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    Journal of East China Normal University(Natural Science) 2011 Vol.2011
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    Journal of East China Normal University(Natural Sc    2011, 2011 (1): 0-0.  
    Abstract2131)      PDF (290KB)(1274)      
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    Seasonal variation of primary productivity in the Daning River backwater area
    ZHANG Jia-lei;;ZHENG Bing-hui;HUANG Min-sheng;LIU Lu-san;WANG Li-ping; WU Guang-ying
    Journal of East China Normal University(Natural Sc    2011, 2011 (1): 1-11.  
    Abstract2751)      PDF (1815KB)(1761)      
    Seasonal variation of primary productivity and its causing factors were investigated during the algae bloom period and dry season in the backwater area of the Daning River, a branch of the Three Gorges, China. The results indicate that most of the investigated physico-chemical parameters, including water temperature, DO concentration (saturation), SPC (specific conductivity), pH, TUR (Turbidity), etc., in the Daning River are significantly different between the algae bloom period and dry season (ANOVA,  p<0.05). The results suggest that primary productivity and chlorophyll-a in algae bloom period are higher than those in the dry season(ANOVA, p <0.05). The vertical distribution of PG (Gross primary productivity), PN (net production) and Chl-a(chlorophyll-a) were not significantly different. The maximum of chlorophyll-a concentrations were observed at 9 m underwater, and the maximun of PN 、 PG were observed from 0 m to 3 m underwater. The results indicate that the Daning River backwater area has a high spatial and temporal heterogeneity in the gross primary productivity, net production and chlorophyll-a. The maximun of gross primary productivity, net production and chlorophyll-a were observed from 0 m to 0.8 m underwater. The results suggest that the water temperature and turbidity are key regulatory factors for primary production. The changes of pH, DO concentration (saturation) and SPC may be the results of the change of the phy-toplankton.
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    Characters and evaluation of nitrogen pollution in the water and surface sediment from six urban lakes in Beijing
    CHEN Jian-jun;;HUANG Min-sheng;LU Shao-yong;ZHAO Yi-kun;WU Yun;HUANG Guo -zhong
    Journal of East China Normal University(Natural Sc    2011, 2011 (1): 12-20.  
    Abstract2982)      PDF (1275KB)(2212)      
    The pollution characters, degree and correlations of the indexes in water and surface sediments from six lakes in Beijing were investigated to provide data for the eutrophication control of urban lakes. Results showed that nitrogen pollution of these urban lakes was serious, and the water total nitrogen (TN) of three lakes were all worse than that of National Environment Quality Standard for Surface Water Grade V during the investigation period. According to the Taihu Lake Basin Pollution Standard, the organic nitrogen content (ON%) pollution from the surface sediment of the six lakes were very serious: the minimum from which was three times of the pollution standard level. According to the standard of Canada, the ecological toxic of sediments TN from two lakes were both above serious toxicity standards, while that of other three lakes were all near to the serious toxicity standards. The correlation of nitrogen fractions and TOC content between index of water and surface sediment from the six urban lakes were calculated, and the results showed that the correlation between sediment TN and sediment TOC was the highest ( r =0.965, p <0.01), correlations between water TN and sediment TN and TOC was extremely significant ( p <0.01) as 0.960, 0.964, respectively. The investigation suggested that the control and reduction of TOC and TN in surface sediment (0~10 cm) of urban lake are of important significance to the control of nitrogen pollution in the lake water.
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    Research on the meteorological and hydrological factors of cyanobacteria bloom in Lake Dianshan
    WANG Ming-wei;XU Qi-xin;CHE Yue;YANG Kai
    Journal of East China Normal University(Natural Sc    2011, 2011 (1): 21-31.  
    Abstract3022)      PDF (390KB)(1397)      
    The high total nitrogen and phosphorus concentration of Lake Dianshan was the key nutrient supply for cyanobacteria bloom and resulted in the eutrophication. The ranges were 3.47~4.53 mg/L and 0.18~0.24 mg/L during 2007-2009, respectively. The results of MODIS images analysis showed that cyanobacteria bloom in Lake Dianshan increased during 2007-2009, and the frequencies were 3 d, 6 d and 10 d, respectively. The results also showed that the main algae aggregation areas after bloom were the centre, the northeast and the east of the lake. The average water level of Lake Dianshan was higher and the water exchanging period extended from June to September, as a result of backwater effect from Huangpu River and Taipu River. The comparison results between the daily meteorological factors variations from July to September and that on the cyanobacteria bloom dates showed that, in summer, high temperature (24.2~30.5 ℃) and long illumination hours (more than 5.9 h) were likely to accelerate the proliferation rate of cyanobacteria; low air pressure(less than 1 015 hPa), low air velocity (slower than 2.2 m/s) and little precipitation were apt to accelerate the floating up rate of cyanobacteria; heavy precipitation and high air velocity would inhibit cyanobacteria bloom. The meteorological and hydrolgocial factors would play a key role in a prediction and early-warning system of lake cyanobacteria bloom, and also be an important part of building a risk prevention system.
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    Review of sediment ecological dredging in urban black-odors river treatment
    CAO Cheng-jin;CHEN Zhen-lou;WANG Jun;HUANG Min-sheng;QIAN Chang-ping;LIU Lin
    Journal of East China Normal University(Natural Sc    2011, 2011 (1): 32-42.  
    Abstract3228)      PDF (1748KB)(3156)      
    Based on the latest research achievements, the common technology of sediment ecological dredging was integrated by condensing some key factors including technical characteristic, process, principle, parameter, using problems, and application prospect. The new integrating technology is expected to be a common technology of sediment displacement treatment. This study offers reference and consult to China urban river pollution controlling.

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    Progress in the development of black-odour prediction models for urban rivers
    LIU Cheng;HU Zhan-bo;HAO Xiao-ming;BAI Yan-yan
    Journal of East China Normal University(Natural Sc    2011, 2011 (1): 43-54.  
    Abstract2704)      PDF (839KB)(2348)      
    The paper first analyzed the causes and mechanisms of black-odour in urban rivers, then provided a review on the achievements on methods and approaches for black-odour evaluation. A number of black-odour assessment models were collected together and then compared with each other. Four widely used models: the multiple linear regression model, the organic pollution index model, the multi-factor weighted index model and the comprehensive water quality identification index model were selected and analyzed. The trend of evaluation model building on black-odour in urban rivers was prospected in the end.
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    Review of artificial wetland treatment technique for initial rainwater runoff pollutant removal
    QIAN Chang-ping;CHEN Zhen-lou;CAO Cheng-jin;WANG Jun
    Journal of East China Normal University(Natural Sc    2011, 2011 (1): 55-62.  
    Abstract2773)      PDF (1131KB)(2259)      
    This paper analyzed and described the technical characteristics, technical procedures, technical principles, technical parameters, technical problems and technology prospects in the artificial wetland treatment. The development prospect of the technique at home and abroad was also anticipated. This investigation will provide references for the project of controlling the city black-odor river pollution.
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    Review of countermeasures of city combined sewer overflows
    LIU Lin;CHEN Zhen-lou;ZHANG Qiu-zhuo;WANG Jun;CAO Cheng-jin
    Journal of East China Normal University(Natural Sc    2011, 2011 (1): 63-72,8.  
    Abstract2406)      PDF (974KB)(2382)      
    This paper analyzed the characteristics of city combined sewer overflow pollutions, illustrated the common process on their control, summarized the research progress. The problems and shortage of combined sewer overflows countermeasures in China were also analyzed. This study which could be useful and provide technical references for chinese city water pollution control.
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    Development and prospect for the study of persistent toxic substances of sediment
    SONG Li;HUANG Min-sheng
    Journal of East China Normal University(Natural Sc    2011, 2011 (1): 73-86.  
    Abstract3348)      PDF (290KB)(1351)      
    The persistent toxic substances (PTS) are divided into persistent organic pollutants(POPs) and heavy metals. The soure of these PTSs and the ways for their entering the sediment were described. It was pointed out that these PTSs have the characteristics of semi-volatilized, high toxic, Long-term residual and biological accumulation. This article also reviewed the research status of the cycle of PTSs in an ecosystem, and PTS damage to the reproductive and organs of a living creature.
    Technique methods for chemical and biological detecting and analyzing PTSs were introduced. The technique of PTS physicochemical-remediation, bio-remediation and phytoremediation were also described. Finally, the research prospect of the PTS in sediment is anticipated.
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    Inoculated sludge selection and start-up of anaerobic ammonia oxidation reactors for the treatment of municipal wastewater
    CHEN Yu-xia; GENG Liang;HUANG Min-sheng;LIN Jian-bo;HE Yan;ZHU Yong
    Journal of East China Normal University(Natural Sc    2011, 2011 (1): 87-94.  
    Abstract2642)      PDF (2878KB)(1486)      
    Two groups of different mixed sludges, with one group including anaerobic granular sludges, malodorous river sediments and aerobic activate sludge (R1), and the other including anaerobic digested sludge, malodorous river bottom sludge and aerobic activate sludge (R2),were used as inocula in two parallel ASBR systems treating actual municipal wastewater for 180~210 d. At the end of the experiment, the inner cultured sludge were observed by scanning electron microscope for analysis of their surface morphology. It was found that anaerobic ammonia oxidation (ANAMMOX) could be successfully achieved in the two systems. The ANAMMOX occurred after operation of 135 days. Additionally, removal efficiencies of NH4+-N(97.35%) and NO-2-N(99%) were observed at the stable stage in the R1 reactor. Comparatively, the R2 reactor took on notable ANAMMOX after 102 days’ operation, the averaged removal efficiencies of ammonia and nitrite were 93.17% and 99% respecfively during stable operation. Taken together, the mixed sludge of R2 can be deemed as a relatively ideal inoculum for the ANAMMOX reactor due to its quicker start-up. The electron microscopy results showed that the anammox bacteria may exist in ASBR reactor.
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    Dynamic junior monitoring of phytoplankton in the process of malodorous river remediation by staged ecological floating-beds
    WU Xiao-hui;ZHANG Dan;HUANG Min-sheng;ZHANG Yong;HE Yan
    Journal of East China Normal University(Natural Sc    2011, 2011 (1): 95-103.  
    Abstract2825)      PDF (2152KB)(1647)      
    The emergent, floating leaf and submerged plants were integrated into Staged Ecological Floating-beds (SEF) for malodorous river′s purification and remediation. The dynamic characteristics of phytoplankton and the water quality were monitored to study the mechanisms of the ecological staged floating-beds for remediation of malodorous river. The results showed that the percentage of Chlorophyta and Cyanophyta decreased after SEF remediation. It was also found that the dominant phytoplankton species were changed, indicating that the quality of effluent were improved. The phytoplankton density reached the maximum in September and the lowest in June, with their values higher than 1×105ind.·L-1 reflecting the high concentrations of nutrients in water. Emerged plant floating-beds among the SEF have the lowest phytoplankton density, indicating that the Hydrocotyle vulgaris has the strongest growth inhibition on algae. Additionally, three kinds of bio-diversity indexes of phytoplankton showed the trends of water quality were improved notably, but there were significant differences in these indexes, and that means it is not suitable to assess the water quality by a single index. The phytoplankton species had close correlation with CODCr and the phytoplankton density had the same relationship with DO. The Shannon-Wiener diversity index was highly correlated with CODCr. The Margalef index was also correlated with CODCr and pH, and the Pielou index significantly correlated with TP ( r =0.438, P <0.05). However, all indexes correlated with NH3-N were not remarkable.
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    Removal of nitrogen in a malodorous river by staged floating treatment wetlands
    XU Yu-rong;ZHANG Yong;HUANG Min-sheng;ZHAO Feng;GAO Shang;HE Yan
    Journal of East China Normal University(Natural Sc    2011, 2011 (1): 104-110.  
    Abstract2587)      PDF (2484KB)(1572)      
    Focused on a malodorous river in Shanghai, a set of staged floating treatment wetlands (SFTWs), by simulating ecological niche distribution of hydrophyte in nature water with three kinds of hydrophyte, Hydrocotyle vulgaris, Nymphaea tetragona, Myriophyllum verticillatum, was designed. The results showed that the average removal rate of ammonian was 71.9%, with 36.1%, 22.3% and 13.5% of ammonia nitrogen being removed by the unit of emergent plants (Hydrocotyle vulgaris) , floating plants (Nymphaea tetragona) and submerged plants (Myriophyllum verticillatum) respectively. Nitrite nitrogen was accumulated in the staged ecological floating wetlands. The average concentration of nitrite in the floating plants unit and submerged unit rose to 1.4 mg/L and 1.5 mg/L from 1.3 mg/L respectively. At the same time, the nitrate nitrogen concentration in the unit of emergent plants and the unit of submerged plants unit is lower than that in the unit of floating plants, also accumulated in the system. The average removal rate of total inorganic nitrogen, mainly by the unit of emergent plants (up to 24.8%), was 45.0%.
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    Demonstration work on purification of urban polluted rivers by staged floating treatment wetlands
    CHEN Yu-hui;ZHANG Yong;HUANG Min-sheng;HE Yan;CAO Cheng-jin
    Journal of East China Normal University(Natural Sc    2011, 2011 (1): 111-118,.  
    Abstract2557)      PDF (2162KB)(1711)      
    By constructing Staged Floating Treatment Wetlands (SFTW) for purification of Xinjiaopu River in Shanghai, the improvement effect of eutrophic water quality was investigated. The results showed that the best removal efficiencies on CODCr, NH4+-N, TN and TP are 21.26%, 29.07%, 37.95% and 20.74%, respectively. According to Surface Water Environment Criteria of China (GB 3838—2002), all the measured water quality indexes except that of TN reached Grade V, basically meeting the requirements.The evaluation result of phytoplankton doinant species and NQI indicated the water quality was at heavy-eutrophication,but NQI decreased 3.26~12.33. The system has good application prospect.
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    Study on the effect of SFTWs for phosphorus removal from malodorous water
    XU Huan;ZHANG Yong;HUANG Min-sheng;LUO Jin-hong;HE Yan
    Journal of East China Normal University(Natural Sc    2011, 2011 (1): 119-125.  
    Abstract2511)      PDF (1534KB)(1642)      
    The staged floating treatment wetlands (SFTWs) were constructed to treat malodorous water of an industrial river in Shanghai by simulating the ecological distribution of aquatic plants in the natural water, focusing on the effect of the season and temperature, plant species, pH, dissolved oxygen (DO) and other factors on the phosphorus removal rate. The results showed that the temperature changes did an obvious effect on the phosphorus removal efficiency of floating bed system where a positive correlation was in a certain temperature range. Total phosphorus (TP) and dissolved phosphorus (PO43- -P) removal rates reached 59% and 62% minimum respectively when the lowest temperature was 15.2 ℃. Among different species of water plants, emergent plant such as Hydrocotyle vulgaris unit removed the most phosphorus with a removal rate of 62.3%. The phosphorus removal efficiency increased when pH value rise. The DO also had an effect on phosphorus removal.
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    Pilot scale study on phosphorus removal from malodorous water body by pumice vertical flow constructed wetlands
    LI Zhen;LUO Jin-hong;HUANG Min-sheng;ZHANG Yong;HE Yan
    Journal of East China Normal University(Natural Sc    2011, 2011 (1): 126-134.  
    Abstract2621)      PDF (2478KB)(1778)      
    Aquatic plants ( Pontederia cordata ) and packing material (pumice) were chosen to construct vertical flow constructed wetlands (VFCW) which have functions of both landscaping and purification of malodorous water body. The pilot study on phosphorus removal from malodorous water body by pumice VFCW was conducted successfully. The concentration of total phosphorus (TP) in influent and effluent of VFCW were detected at different times. The results show that removal rate of TP ranged 58.13%~83.25% and the changing trend of TP removal rate is in accordance with that of temperature. The TP removal effect varies with time and space: In case of short experimental runs (less than 2 months), the surface (less than 20 cm thick) of pumice displays stronger removal effect of phosphorus than other depths; in case of more than 2 months, the removal effects of phosphorus have small variations in different depths. Study on the correlation between ferric iron and phosphorus in the depth of 20 cm by SPSS V13.0 shows Pearson correlation coefficient r =-0.692, P =0.018<0.05, which indicates a negative correlation between the concentrations of ferric iron and the phosphorus.
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    Study of a new bio-packing tank for the pretreatment of malodorous river water
    CHENG Qing-lin;ZHANG Yong;HUANG Min-sheng;PAN Zheng; HE Yan;CAO Cheng-jin
    Journal of East China Normal University(Natural Sc    2011, 2011 (1): 135-140.  
    Abstract2343)      PDF (1863KB)(1654)      
    The goal of this experiment is to improve the performance of constructed wetland for the malodorous black river. The average removal rates of the new bio-packing tank on system CODCr ,NH3-N and TP were 36.63%, 29.41% and 29.22%, respectively, and all being higher than that of the filling purification tank. A Scanning Electron Microscope (SEM) analysis showed that the new flexible medium was characterized by fibrous, large surface area and easy to membrane-hanging. This new tank can be used for recovering the ecosystem of water body, and as a good supplement to constructed wetland.
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    Grey relational analysis of aquatic plants’ physiological responses to malodorous water treatment
    ZHANG Dan;HE Yan;HUANG Min-sheng;LU Xiao-ming
    Journal of East China Normal University(Natural Sc    2011, 2011 (1): 141-147.  
    Abstract2418)      PDF (910KB)(1557)      
    The grey relational analysis was initiated to investigate the relationships between the physiological properties of aquatic plants and the performances of the bio-eco-technology for the treatment of malodorous rivers in Shanghai. The main objective of this research was to provide scientific explanation for the water purification mechanisms of the bio-eco-technology. The results indicated that the priority response order of the plants physiological properties for COD and NH4+ -N removal was POD>CAT>Chla>SP>Chlb, indicating that the microbial degradation could be mainly responsible for the removal of COD and NH4+ -N. However, the priority associated grade of the plant physiological characteristic for TP removal was Chlb>SP>Chla>CAT>POD, demonstrating that the adsorption of aquatic plants played a dominant role in removing total phosphrous from malodorous black water.
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    Process characteristics of EGSB for municipal sewage treatment
    GENG Liang;CHEN Yu-xia;HUANG Min-sheng;ZHU Yong;HE Yan;LIN Jian-bo
    Journal of East China Normal University(Natural Sc    2011, 2011 (1): 148-155.  
    Abstract2596)      PDF (2868KB)(1413)      
    The start-up and operation performances of EGSB were investigated for municipal sewage treatment, and the key operational parameters were also analyzed. After 45 days, EGSB could be started-up effectively with the removal of CODCr and NH3 -N being 58.8% and 32.9%, respectively. In the mean time, the removal efficiency of ammonia and nitrite were from negative to positive, and the anammox strengthened gradually. It was also found that the reactor operated well at ambient temperature with the average CODCr removal efficiencies of 66.6%. The average removal efficiencies of NH3 -N, NO2- -N and NO3- -N were up to 90% and the anammox appeared markedly in this system. The quality of the effluent in the system could meet grade I of Integrated Wastewater Discharge Standard (GB 8978—1996). It was suggested that the HRT of EGSB in operation is less than 2 h and the reflux ratio less than 400%.
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    Oil sorption of textile fibers for sudden oil spill pollution in urban rivers
    QI Pei-shi;LIN Na;LIU Yun-zhi
    Journal of East China Normal University(Natural Sc    2011, 2011 (1): 156-162.  
    Abstract2381)      PDF (1267KB)(1802)      
    Cotton, flax fiber and hemp fiber, three of the most common and aboundant textile fibers, were evaluated as sorbent for treating sudden oil spill pollution. Oil-sorption capacity, sorption rate, reusability of sorbents, and the effect of river temperature were investigated. Sorption kinetic equation was established by curve fitting under the different sorption condition. All of the three textile fibers showed high oil sorption performance from the results and were promising as a rapid respond approach for sudden oil spill treatment of urban river.
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    Development of a black-odour prediction model for Nanning Zhupai Creek
    HAO Xiao-ming;HU Zhan-bo;LIU Cheng;WEI Yong-ping; LI Zhi-hua;WEI Qun
    Journal of East China Normal University(Natural Sc    2011, 2011 (1): 163-171.  
    Abstract3137)      PDF (2329KB)(1963)      
    In this paper, several major parameters (such as CODCr, DO, NH3 -N, Fe and Mn etc.) in Nanning Zhupai Creek were used to correlate with the black-odour index. The results showed that CODCr, NH3 -N, DO, Fe, Mn were the major factors to affect the black-odour index. Based on a set of data, a predict model for the black-odour index in Zhupai Creek was developed, i.e.,
    I=0.050 3[CODCr]+0.257 6[NH3 -N]-2.304 9[DO]+1.239 4[Fe]+2.770 0[Mn]+14.407 8.
    The above model provides not only a good evaluation tool for the black-odour level in Zhupai Creek, but also the theoretical basis for building early warning monitoring system in the black-odor in Nanninig urban rivers.
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    An investigation of human settlement environment of typic black-odor rivers in Wenzhou
    HUANG Jing;LIU Yao-long;CHEN Zhen-lou;WANG Jun;YE Ming-wu
    Journal of East China Normal University(Natural Sc    2011, 2011 (1): 172-178.  
    Abstract2743)      PDF (1843KB)(1802)      
    In order to estimate the performance of the corresponding management engineering, especially relate to the human settlement, a sampled questionnaire survey named <The evaluation of human settlement environment of typic black-odor rivers in Wenzhou > was conducted to the residents along Shanxia River and Jiushan River in Wenzhou to obtain the feelings of people lived near the dirty river about the water, landscape as well as the whole environment. Conclusions can be drawn as follows: the investigated residents who take an attitude that the rivers are in urgent need of comprehensive treatment account for 86.2%. Nearly 40% of the residents enjoy the ecological landscape along both sides of the river, while 58.6% of residents dissatisfy with the water environmental quality. The lifeline system around the river is pretty good, and the cultural and sports facilities of both sides are well received. Environmental management ability of government is deemed to be below average. The results have some guidance for engineering implementation.
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    Pilot scale study on the treatment of water in Wenruitang River by fluidized bed reactor with embedded nitrobacteria
    ZHANG Ye-jian;YE Hai-ren;ZHENG Xiang-yong;Yan Li
    Journal of East China Normal University(Natural Sc    2011, 2011 (1): 179-184.  
    Abstract2181)      PDF (1649KB)(1500)      
    The treatment characteristics of a pilot scale fluidized bed reactor with embedded nitrobacteria was investigated to rapidly remove ammonia from Wenruitang River. Results showed that 45.50% of the ammonia nitrogen in the Wenruitang River was removed by the fluidized bed reactor with the average influent ammonia nitrogen concentration of 6.15 mg/L. The main product of the nitrification process was nitrate nitrogen. CODMn could also be removed during the treatment process. Harmful ammonia nitrogen in urban rivers could be rapidly be removed by the fluidized bed reactor with embedded nitrobacteria. This could be applied in the treatment of urban river water.
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    Efficiencies of different zeolite and medical stone combinations removaling the nitrogen and phosphorus in urban rainfall runoff
    ZHOU Dong;CHEN Zhen-lou;BI Chun-juan;WANG Jun;LIN Shou-min;QI Ying-ying
    Journal of East China Normal University(Natural Sc    2011, 2011 (1): 185-193.  
    Abstract2280)      PDF (1258KB)(1902)      
    One kind of packed columns, which were filled up with three different volume ratios of zeolite and medical stone (5 ∶5, 7 ∶3, 3 ∶7; V ∶V), were used to investigate the efficiency of zeolite and medical stone to removal the nitrogen and phosphorus in synthetic urban rainfall runoff during a 7 days period. The experiments were token twice, and the results showed that 3 ∶7 ratio of packed column could removal 78.61% and 85.28% nitrogen in the first and second phase experiment respectively, and the phosphorus removal rates reached 96.73% and 94.59%; the removal efficiency of nitrogen and phosphorus of 5 ∶5 ratio packed column were 83.18% and 97.02% in the first phase, and 80.24% and 86.16% in the second phase; while in 7 ∶3 ratio packed column, about 92.39% and 80.01% nitrogen and 51.79% and 57.28% phosphorus was removed respectively. It was concluded that in considering the whole removal efficiency and regeneration capability of zeolite and medical stone, the combination of 3 ∶7 ratio was the best choice.
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    Assessment on the effect of surface dust on mercury and arsenic in rainfall-runoff in the Shanghai urban district
    ZHANG Jing-jing;BI Chun-juan;CHEN Zhen-lou;LI Meng
    Journal of East China Normal University(Natural Sc    2011, 2011 (1): 194-202.  
    Abstract2325)      PDF (1811KB)(1804)      
    This study was about undertaken to assess the impact of Hg and As on the surface environment system in Shanghai urban district. Particle size effect of Hg and As in surface dust was researched, and the result showed that the high values centralized in the range of <125 μm and particle size effect played a role in pollutant concentrations. The contents of contaminants decreased with the increasing of flow time except for Hg of highway. The consequence of environmental behavior of Hg and As in multi-media environment of surface dust and rainfall-runoff system proved that surface dust made a great contribution on the load in rain-fall runoff. The EMCs of Hg in roofing and highway were similar, but EMCs of As were opposite to them. The result indicated that the magnitude of the first flush phenomenon which was affected by characterization of rainfall and different land use types was found to be greater which was closely linked with precipitation.
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    Pricing the constant elasticity of variance trinary option
    PENG Bin;PENG Fei
    Journal of East China Normal University(Natural Sc    2011, 2011 (2): 1-9.  
    Abstract2587)      PDF (214KB)(1588)      
    The constant elasticity of variance (CEV) model can prevent the empirical bias exhibited by the Black-Scholes model such as the volatility smile. In this article, CEV model was used to describe the underlying asset price dynamics. The analytical pricing formula for the trinary option was derived in terms of complementary noncentral chi-square distribution function. A simply and efficient algorithm for computing this complementary distribution function was presented. Approximation to this complementary distribution function was provided to estimate accurately the result of the pricing formula derived above when the computation of the exact solution is problematic. This study will pave a new way to evaluate the class of the exotic option in the time dependent constant elasticity of variance.
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    Oscillation theorems of second order neutral differential equations with positive and negative coefficients
    YANG Jia-shan
    Journal of East China Normal University(Natural Sc    2011, 2011 (2): 10-16,3.  
    Abstract2706)      PDF (354KB)(1344)      
    Using the fixed point theorem in Banach space, and by introducing parameter function and the generalized Riccati transformation, a new nonoscillation criteria for the equation was obtained. In addition, a sufficient condition for oscillation of the equation was proposed. These criteria can improve the restriction of the conditions for the equation. Some existed results in the literatures have been further improved and extended.
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    Genus of Cm,n and strong genus embedding of Km,n
    SHAN Song-ling;REN Han
    Journal of East China Normal University(Natural Sc    2011, 2011 (2): 17-21.  
    Abstract2500)      PDF (174KB)(1674)      
    Let Cm,n be the join graph of Cm(a cycle of ength m) and n isolated vertices. In this paper, we first show hat the genus and nonorientable genus of Cm,n equal those of Km,n, which were well known and discovered by Ringel [1, 2].
    Then we show that the complete bipartite graph Km,n has a strong orientable genus embedding if m≥2 and n≥2 and has a strong nonorientable genus embedding if m≥3 and n≥3.
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    Locally connectivity and up-embeddability of a graph
    WU Yong-xiang;LI Gang;LI Hao-ling;REN Han;
    Journal of East China Normal University(Natural Sc    2011, 2011 (2): 22-31.  
    Abstract2567)      PDF (361KB)(1336)      
    This paper studied the transformation of spanning trees in a locally connected graph and gave a new proof of Nebesk theorem for up-embeddability of a locally connected graph and generalized it to a new class of upper- mbeddable graphs.
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    Edge colorings of planar graphs with maximum degree five
    NI Wei-ping
    Journal of East China Normal University(Natural Sc    2011, 2011 (2): 32-38.  
    Abstract2887)      PDF (261KB)(1421)      
    By applying a discharging method and using some theorems of critical graphs, we proved that every planar graph G with Δ=5 is of class 1, if any 3-cycle is not adjacent to any 4-cycle or to any 5-cycle in G. Therefore, we concluded two sufficient conditions for planar graph G to be Class 1.
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    Spectrum of folded hypercubes
    CHEN Ming;CHEN Bao-xing
    Journal of East China Normal University(Natural Sc    2011, 2011 (2): 39-46,6.  
    Abstract2993)      PDF (339KB)(1454)      
    By analyzing the structure of folded hypercubes, we obtained the spectra of folded hypercubes and the spectra of their Laplacian matrices.
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    Parametric estimation of generalized-power-Weibull regression models with interval-censored data
    ZHU Jia-jia; TIAN Hou-kun; XIE Feng-chang
    Journal of East China Normal University(Natural Sc    2011, 2011 (2): 47-53,8.  
    Abstract2841)      PDF (517KB)(1649)      
    In order to study interval-censored observation data, a class of generalized-power-Weibull non-linear regression models combing the generalized-power-Weibull distribution and the non-linear regression model was proposed, and the maximum likelihood estimates of the model parameters were obtained based on iteration. Finally, some Monte Carlo simulation results were given to
    illustrate the effectiveness of the proposed method in terms of different hazard functions, sample sizes and censoring proportions.
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    Normality of a family of meromorphic functions sharing a holomorphic funtion
    LI San-hua;
    Journal of East China Normal University(Natural Sc    2011, 2011 (2): 54-61.  
    Abstract2466)      PDF (239KB)(1181)      
    This paper was concerned with normal families of meromorphic functions associated with shared functions. In given conditions, the normality of families of meromorphic functions sharing one holomorphic function was proved.
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    First-principle investigation of Al2O3 monolayer covered on SiO2
    ZHU Min;HAN Jing-mei;XIE Wen-hui
    Journal of East China Normal University(Natural Sc    2011, 2011 (2): 62-69.  
    Abstract2451)      PDF (2104KB)(1308)      
    We setuped a slab model of Al2O3/SiO2 to investigate atomic coordination and electronic structure. By first-principle calculation, we compared atomic positions of monolayer Al2O3 with normal Al2O3 surface to analyze the variation of atomic positions, bond lengths and bond angles. Moreover, we discussed the electronic structure and chemical bonding of the monolayer Al2O3.
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    Effects of pH and substituent group on electrochemical redox of Schiff bases
    ZHU Yan-song;TIAN Xiao-hua;XIN Guang
    Journal of East China Normal University(Natural Sc    2011, 2011 (2): 70-76.  
    Abstract3863)      PDF (962KB)(1617)      
    Five kinds of Schiff bases with different structures were synthesized (N-phenyl benzoylimine, N-phenyl-2-hydroxyl benzoylimine and N-(2-hydroxyl) phenyl benzoylimine which possessed —OH, N-phenyl-4-nitryl benzoylimine and N-(4-nitryl) phenyl benzoylimine which possessed —NO2). Cyclic voltammetry technique was used to investigate electrochemical redox behavior of these Schiff bases at glassy carbon electrode. Meanwhile, effect of pH on electrochemical redox reaction of Schiff bases was studied. The results demonstrated that these Schiff bases at glassy carbon electrode could be deoxidized and electrochemical reduction was an irreversible process; both different substituting groups (—OH and —NO2) in benzene and the same substituting group in different positions(benzene joined with carbon, benzene joined with nitrogen) had effects on electrochemical deoxidization of —CH==N— group; in a buffer solution with varying pH, the concentration of H+ affected electrochemical deoxidization of —CH==N— group; it was deduced that the mechanism for the electrochemical reduction process of —CH==N— group was that firstly one electron was acquired in nitrogen, secondly one electron was acquired in carbon, and at last two protons were acquired.
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    Area-based algorithm for reshaping simple polygons
    FANG Lei;ZHANG Hua-xin;YAO Shen-jun
    Journal of East China Normal University(Natural Sc    2011, 2011 (2): 77-88.  
    Abstract2777)      PDF (5198KB)(1452)      
    This paper proposed a new algorithm to reshape a simple polygon on the basis of its area. Three adjacent vertexes were firstly chosen to form a triangle. The area of the triangle was then compared with a predefined value. Based on the difference between the two values, a new vertex was created to replace an original one. In this way, the polygon could be reshaped and its area could be kept equal to the user defined value. A probability domain was incorporated to limit the searching directions and the users were allowed to select adjusting vertexes in an interactive manner. The “rose” method was also introduced in this study in order to improve the efficiency. This GIS-based approach was successfully applied to the County-level Spatial Data Collection Information System and the Province-level Land Use Planning Management Information System of Zhejiang Province.
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    Analysis on the macro-pattern of meta-plant-community in Thousand Island Lake area using RS-GIS methods
    WANG Chun-ye; LI De-zhi-; SUN Yu-bing; LI Li-ke; ZHAO Lu-qing; PAN Yu; LU Yuan-yuan; ZHAO Mei-xia; GAO Jin-jin
    Journal of East China Normal University(Natural Sc    2011, 2011 (2): 89-98.  
    Abstract2572)      PDF (826KB)(1521)      
    The macro-pattern of a typical meta-plant-community in the area of Thousand Island Lake, Chun’an country, Hangzhou, was studied using the methods of remote sensing and GIS. The values of NDVI of islands with different sizes, and the landscape pattern of island patches with different grades of NDVI were studied. The results revealed the significant positive correlation between the sizes of islands and their NDVI values. The landscape pattern of patches with various NDVI grades within the different types of islands influenced on its overall level of NDVI values to some extent. The entire landscape suffered from high degree of fragmentation. The results showed that the larger the island area is, the smaller the density of patches with various NDVI grades is, the smaller the degree of fragmentation is, the stronger the cohesion of patches with same NDVI grade is, the more diverse the landscape types is, and the evener the distribution of patches of each type in the landscape is. Such vegetation pattern is conducive to the migration and colonization of individuals or propagules of species, as well as the functional linkage between local plant communities with different NDVI grades, and the maintenance of stability of community structures, resulting the relatively high overall level of NDVI. The results of the landscape indexes of the patches with various NDVI grades reflected the macro-pattern of the meta-plant-communities in the area of Thousand Island Lake, and deepened our understanding of the landscape pattern of the area, which preliminarily tested the adaptability and feasibility of the methods of remote sensing and GIS in studying the macro-pattern of meta-plant-communities in general.
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    Magnetic properties of sediments from the major tributaries of the Jialing River and their implications for provenance identification
    LUO Yi;ZHANG Wei-guo;LIU Ying;LIU Yuan
    Journal of East China Normal University(Natural Sc    2011, 2011 (2): 99-107,.  
    Abstract2524)      PDF (2535KB)(1365)      
    Magnetic measurements and particle size analysis were carried out on samples collected from the tributaries in summer of 2009, with the purpose to recognize the difference in magnetic properties among them. The results indicate that the magnetic properties of the sediments are dominated by both magnetite and hematite, which reflects the fluvial input from Mesozoic red beds widely distributed in Sichuan Basin. Sediments from the main stream of Jialing River are characterized by higher proportions of magnetite due to loess input in the upper reach. A combination of magnetic parameters of χ, SIRM and S-300 can discriminate the sediments from the three tributaries very well.
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    Ecological suitability assessment of land for urban residential areas and optimum strategy: A case study ofFengxian District, Shanghai
    ZHENG Wen-fa;CAI Yong-li;ZHOU Zhao-ying
    Journal of East China Normal University(Natural Sc    2011, 2011 (2): 108-118.  
    Abstract2931)      PDF (3463KB)(1547)      
    This article took Fengxian District, Shanghai as an example to do land ecological suitability assessment for urban residential area location. Topography, land use, natural environment, and service facilities were chosen as factors of the index system. The assessment was accomplished with ecological sensitivity analysis and land suitability evaluation. The result shows that the maximum optimum area for urban resident area accounts for 18.88% of the total area; the moderate optimum area 8.20%, the area for ecological protection 26.52%, and the basic farmland 31.49%. Based on the results, suggestions and recommendations were made on urban development and environmental protection of Fengxian District.
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    Experimental studies on removing humid acid by TiO2 photo-catalytic oxidation
    WU Wei;HU Jiang-yong; ZHAO Ya-ping
    Journal of East China Normal University(Natural Sc    2011, 2011 (2): 119-125.  
    Abstract2363)      PDF (1153KB)(1159)      
    This study investigated the effects of different factors on removal of Humic Acid(HA), such as initial pH, mass concentration of catalyst, initial mass of HA, etc. The combination of SEC and LC-OCD analysis showed that the large HA molecular was converted into acids of small molecular gradually during degradation process. By simulating the disinfection process, the paper demonstrated the photo-catalytic system could not only remove the color of HA but also diminish the formation potential of DBPs effectively.
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    Development and study of the thermophilic microbial agent for disposing the food waste and its degradation properties
    LI Hua-zhi;LI Xiu-yan;HU Qi-ping;HAN Bo-bo
    Journal of East China Normal University(Natural Sc    2011, 2011 (2): 126-133.  
    Abstract2593)      PDF (567KB)(1340)      
    Six strains of thermophilic high-efficient bacteria with amylase, lipase, protease and cellulase activity at 65 ℃ were isolated, purified and screened from food waste treatment system by using its thermostable and thermophilic characteristics and the basic principle of aerobiotic decomposition of organic compound. Pathogens, such as salmonellsa and shigella, were not found in security detection on the six strains, indicating the thermophilic bacteria isolated from pathogenic factors do not exist. With the disposing experiment of food waste,four thermophilic strains(HB1,HB2,HB4 and HB6)with high disposing efficiency for food waste were selected and produced for the thermophilic microbial agent. After being tested on the 100-kg disposing machine of food waste, the thermophilic microbial agent showed significant disposing efficiency on crude fat and crude fiber in food waste within 24 hours. When 5% thermophilic microbial agent was administrated at temperature up to 65 ℃, the degradation efficiency for crude fat and crude fiber was 30.7% and 11.3%, respectively. The crude protein content has increased 9.5%. The degradation efficiency was remained stable following a 48-hour test, demonstrating its rapid degradation ability on organic compound within 24 hours.
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    Teratogenic phenotypes induced in Xenopus tropicalis embryos by all-trans retinoic acid
    CAO Qing-zhen;QIAN Li-juan;ZHANG Xiao-li;YUAN Jing;LIU Jun-qi;SHI Hua-hong
    Journal of East China Normal University(Natural Sc    2011, 2011 (2): 134-141.  
    Abstract2644)      PDF (1203KB)(1444)      
    In this study, Xenopus tropicalis embryos were exposed to a known teratoen, all-trans retinoic acid (RA), for 24, 36 and 48 h. Exposure to 2, 10 and 50 μg·L-1 RA showed no effects on the survival rate of embryos, but it significantly inhibited the growth and development of embryos. RA also led to malformations in all embryos, which suggests that RA is a strong teratogen, and 〖WTBX〗X. tropicalis〖WTBZ〗 is very sensitive to RA. The most characteristic malformations were small brains, less pigmentation in eyes, pericardial edema and bent tails. After 24, 36 and 48 h of exposure, the brain teratogenic index and eye teratogenic index were significantly increased in the treatment groups, and these effects showed a good concentration-effect but not time-effect relation. The tail teratogenic index was higher in embryos after 48 h of exposure than that after 24 h of exposure. The comparisons of teratogenic phenotypes induced by RA and tributyltin indicate that RA is a good reference for revealing the mechanisms of tributyltin-mediated teratogenicity. Our results also suggest that FETAX might be modified as an assay to study the mechanisms of contaminants in future.
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    Cytotoxicity of hollow mesoporous silica nanoparticles on human umbilical vein endothelial cells
    HE Chang-liang;ZHAI Wan-yin;ZHANG Hong-xia;CHANG Jiang;ZHANG Hong-feng;GUO Li-min;CHEN Hang-rong
    Journal of East China Normal University(Natural Sc    2011, 2011 (2): 142-151.  
    Abstract2469)      PDF (2443KB)(1380)      
    In this study the cytotoxicity caused by HMSN to human umbilical vessel endothelial cells (HUVECs) was examined by inhibition of cell proliferation, lactate dehydrogenase (LDH) release assay, flow cytometer analysis, transmission electron microscopy (TEM) and indictive coupled plasma-atomic emission spectroscopy (ICP-AES). The results showed that HMSN at the concentration more than 62.5 μg/mL will exert cytotoxicity on HUVECs and the IC50 is 150 μg/mL. At high concentration HMSN significantly inhibited the proliferation of HUVECs, causing LDH release, arrest cell cycle at G1 period and eventually induced necrosis. The extracts of HMSN also had the same effect on HUVECs at different dilution ratios less than 1:64, indicating the degradation product of HMSN had cytotoxicity. The cytotoicity may come from the physical damage on cell structure by HMSN, and chemical disturbance on metabolism caused by product of HMSN degradation. Therefore, attentions should be paid on the single dosage, avoiding cytotoxicity to normal tissue vessels; stimulating cytotoxicity to tumor vessel.
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    Study on 13 human population genetics characters of Zang of Linzhi in Tibet
    ZHANG Xing-hua;ZHENG Lian-bin;LU Shun-hua;LUO Dong-mei;YU Hui-xin;WANG Zhi-bo;WU Ya-wen
    Journal of East China Normal University(Natural Sc    2011, 2011 (2): 152-162.  
    Abstract2460)      PDF (725KB)(1569)      
    Samples of 492 middle school students of Zang, including 183 males and 309 females, were investigated on 13 human population genetics characters. The results are as follows:(1) There are significant differences on 5 characters, including mongoloid fold, eyefold of the upper eyelid, front tooth type, nasal profile and palmar digital fomula;(2) The mongoloid fold, projecting nasal profile, ear lobe appearance, hyperextension thumb and flat nail of Zang have low percentages in Chinese ethnic groups, but there are high percentages in eyefold of the upper eyelid, narrow nostril, curly hair and 1>2 of plantar digital formula. The percentages of shovel-shaped front tooth, protruding chin, forehead hair point and ring finger have the middle level in Chinese ethnic groups.(3) Correlations are little among 9 characters of head and face,and there are no correlations among 4 characters of hand and foot.The results of cluster analysis show that there are significant differences of the 13 human population genetics characters between Zang from Linzhi and northern ethnic groups.
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    Early maternal deprivation impairs emotional memory in rats
    JIN Jing;ZHANG Xu-liang;YANG Li-guo;XU Hao;ZENG Qing-wen;CAO Xiao-hua
    Journal of East China Normal University(Natural Sc    2011, 2011 (2): 163-170.  
    Abstract2201)      PDF (1017KB)(1627)      
    The experiment was designed to investigate the effect of early maternal deprivation on cognition and memory in rats. The neonatal SD rats were divided into two groups randomly, the control group and the early maternal deprivation group. All rats were tested in the different behavioral paradigms in adult period. No significant difference was measured in locomotor activity and exploration between two groups in the open field test. In the novel object recognition test, there was also no significant difference in exploratory preference to the novel object. However, compared with the controls, rats in the early maternal deprivation group exhibited short escape latency in the passive avoidance test, suggesting early maternal deprivation impairs fear memory of rats. These results indicate that early maternal deprivation may impair amygdala-dependent emotional memory in rats.
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    t-type estimators and influence diagnostics in semiparametric nonlinear models
    JIANG Rong;SHAO Ming-jiang;QIAN Wei-min
    Journal of East China Normal University(Natural Sc    2011, 2011 (3): 1-11.  
    Abstract3041)      PDF (376KB)(1844)      
    t-type regression estimators for the semiparametric nonlinear models were defined, and the EM algorithm for the t-type estimators were given. Moreover, the consistency of t-type regression estimators was obtained. And on the basis of the Q-function in the EM algorithm, statistical diagnostics methods were investigated. Finally, the proposed algorithm was tested by simulation analysis and by a real data sample.
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    Pricing power options in a jump diffusion model
    SU Xiao-nan;WANG Wen-sheng
    Journal of East China Normal University(Natural Sc    2011, 2011 (3): 12-20.  
    Abstract2673)      PDF (350KB)(1782)      
    Under the assumption that the underlying asset prices obey jump diffusion processes and the market interest satisfies Vasicek model, and when the interest is correlated with the asset prices, by the way of change of measure, a closed solution of pricing of power option was given. Moreover, some special situations were considered.
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    Robust strictly dissipative control for delay-dependent uncertain singular markovian jump systems
    LI Xiu-ying;XING Wei;ZHANG Qing-ling
    Journal of East China Normal University(Natural Sc    2011, 2011 (3): 21-28.  
    Abstract2819)      PDF (390KB)(1460)      
    Firstly, the conception of strict dissipativeness was introduced for delay-dependent singular Markovian jump systems. Then a sufficient condition was derived guaranteeing these systems stochastically admissible and strictly dissipative by using the linear matrix inequality technique. Furthermore, the design method of a state feedback controller was given which ensures the resultant closed-loop system to be stochastically admissible and strictly
    dissipative.
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    Algebraic connectivity of trees with the maximum degree
    GU Lei;YUAN Wei-gang;ZHANG Xiao-dong
    Journal of East China Normal University(Natural Sc    2011, 2011 (3): 29-34.  
    Abstract2939)      PDF (174KB)(1911)      
    This paper investigated how the algebraic connectivity of trees changes under some graph perturbations. Then these results were used to characterize the extremal tree which has the smallest algebraic connectivity in the set of trees given the number of vertex and the maximum degree.
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    Fourth and fifth largest spectral radii of a 2-tree with n vertices
    YUAN Xiu-hua
    Journal of East China Normal University(Natural Sc    2011, 2011 (3): 35-39.  
    Abstract2735)      PDF (295KB)(1487)      
    Let G be a 2-tree with n vertices. By applying the technique of edge moving transformation, we first obtained a decidable theorem about the spectral radius of G. Then through comparing the characteristic polynomials of some graphs, the extremal graphs which have the fourth and fifth largest spectral
    radii of this kind of graphs were determined.
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    Lower bounds of signed edge domination numbers in graphs
    JIAO Jiao;SHANG Hua-hui;ZHANG Geng
    Journal of East China Normal University(Natural Sc    2011, 2011 (3): 40-43.  
    Abstract2825)      PDF (293KB)(1314)      
    This paper showed the lower bounds of signed edge domination number of G, if there is a maximum elementary graph which is an induced subgraph of G; Also showed the lower bounds of signed edge domination number for every nontrivial tree T of order n.
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    Study of limit cycles for some non-smooth Lienard systems
    YANG Lu;LIU Xia;XING Ye-peng
    Journal of East China Normal University(Natural Sc    2011, 2011 (3): 44-53.  
    Abstract2328)      PDF (193KB)(1573)      
    Algebraic method was used to study the Hopf cyclicity of non-smooth Lienard systems on the plain. Some new formulas for computing focus values were presented. Based on the formulas, the number of limit cycles bifurcating from some non-smooth Lienard systems was obtained. The results improve the known results.
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    Geometrical property of the three-part homogenous Cantor-set
    LI Xue-feng;JIANG Kan
    Journal of East China Normal University(Natural Sc    2011, 2011 (3): 54-58.  
    Abstract2298)      PDF (290KB)(1366)      
    Let Cβ be the three-part homogenous cantor-set with ratio β(0,1/3). This paper studied a visibility problem: givenβ(0,1/3), is there a ray Lλ with slope λ(0,1) which goes through the origin (0,0) such that the intersection of Lλ and set Cβ× Cβ only contains the origin? Based on the method of renormalization, some results were obtained.
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    Higher order optimality conditions for weakly Benson proper efficient solutions of nonconvex set-valued optimization problems
    WANG Kai-rong;WANG Yi-li;CAO Wei
    Journal of East China Normal University(Natural Sc    2011, 2011 (3): 59-67.  
    Abstract2681)      PDF (333KB)(1930)      
    Firstly, some necessarily basic concepts and an important lemma were given. Secondly, some important properties of generalized higher-order tangent sets were discussed. Finally, by virtue of those properties and the Gerstewitz's nonconvex separation functional, necessary and sufficient optimality conditions were obtained for weakly Benson proper efficient solutions of set-valued optimization problems without any convexity assumption on objective
    and constraint mappings. Moreover, two examples were given to show that the result obtained is a generalization to the corresponding results in literatures.
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    Solvability of equations involving Smarandache function
    ZHAO Jiao-lian
    Journal of East China Normal University(Natural Sc    2011, 2011 (3): 68-72.  
    Abstract2217)      PDF (217KB)(1552)      
    This acticle studied the arithmetical equation involving Euler totient function and Smarandache function. By using elementary number theory methods, the general form of solutons was discussed, and three interesting theories were obtained. The existed results were improved.
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    Maximal signless Laplacian spectral radius of bicyclic graphs with given independence number
    LI Rui-lin;SHI Jin-song;DONG Bing-can
    Journal of East China Normal University(Natural Sc    2011, 2011 (3): 73-84.  
    Abstract2523)      PDF (491KB)(1646)      
    Let B(n,α) be the class of bicyclic graphs on n vertices with independence numberα. Let B1(n,α) be the subclass of B(n,α) consisting of all bicyclic graphs with two edge-disjoint cycles and B2(n,α) = B(n,α)\B1(n,α). This paper determined the unique graph with the maximal signless Laplacian spectral radius among all graphs in B1(n,α) and B2(n,α), respectively. Furthermore, the upper bound of the signless Laplacian spectral radius and the extremal graph for B(n,α) were also obtained.
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    Realization of quantum symplectic group O(Spq(8)) via vector representation of Uq(sp(8))
    GONG Ben-xue;LI Sha-sha
    Journal of East China Normal University(Natural Sc    2011, 2011 (3): 85-89.  
    Abstract2632)      PDF (172KB)(1600)      
    To the quantum enveloping algebra Uq(sl2(C)) of type A Lie algebra A2, Jantzen gave the defining relations of SLq(2) arising from the representations of Uq(sl2(C)) by the R-matrix. This paper studied the similar question to Uq(sp(8)) of type C Lie algebra sp(8) which is more difficult than type A, and gave the realization of O(Spq(8)) arising from the representations of Uq(sp(8)) via Jantzen's approach.
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    Note on induced modules and their extensions for graded Lie algebras of Cartan type
    HUANG Hui
    Journal of East China Normal University(Natural Sc    2011, 2011 (3): 90-99.  
    Abstract2509)      PDF (235KB)(1585)      
    In the sense of generalized restricted Lie algebras, it was proved that the modified induced modules of graded Lie algebras of Cartan types W, S, H coincide with coinduced modules. The relationship between induced modules and coinduced modules was obtained, extending the corresponding result by Rolf Farnsteiner and Helmut Strade in the case of restricted Lie algebras. Therefore, it was proved that any irreducible non-exceptional modules for graded Lie algebras of Cartan types W, S, H with generalized p-character of height not more than a precise upper-bound is a coinduced module. By applying this with some results on cohomology obtained by Rolf Farnsteiner in 1990s, we finally got some further results on extensions between simple modules of graded Lie algebras of Cartan types W, S, H.
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    Extension and implementation of the homotopy analysis method
    ZHU Wei;LIU Yin-ping
    Journal of East China Normal University(Natural Sc    2011, 2011 (3): 100-110.  
    Abstract3406)      PDF (794KB)(1618)      
    The homotopy analysis method (HAM) was extended based on the new definition of the Adomian Polynomials proposed by Rach in 2008. Three new kinds of Rm in HAM were defined. By analyzing we know that their expanding speeds are higher than that of the original HAM. These methods provide us more choices to deal with differential equations, especially when the original HAM does not work well. A Maple package was developed to automatically solve ordinary differential system with all of these methods conveniently.
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    Network selection scheme and a simulator for future urban road heterogeneous wireless access networks
    CHEN Lei;FANG Sheng;WANG Neng
    Journal of East China Normal University(Natural Sc    2011, 2011 (3): 111-122.  
    Abstract2323)      PDF (1506KB)(1754)      
    A utility based network selection scheme having been formerly proposed by us was explained and analysed furtherly. Different from a traditional scheme only considering two factors, our scheme took more factors important for multimedia application in future urban road heterogeneous wireless access networks into account within a simple framework. The selection algorithm was improved and a rudimental simulator was developed.
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    Tacit knowledge transfer simulation based on the cellular automata
    WANG Lu-bang;QIAN Xing-san
    Journal of East China Normal University(Natural Sc    2011, 2011 (3): 123-133.  
    Abstract2150)      PDF (2615KB)(1603)      
    The paper solved the simulating about tacit knowledge transfer by using the cellular antomata model.The neighbor space was changed to simulate the tacit knowledge transfer within the organizatianal structure. Through the collection of the relevant data, the transfer laws and characteristics on the tacit knowledge can be revealed.
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    Tertiary relict plant Liquidambar acalycina Chang on Mt. Tianmu in Eastern China: Characteristics of the community and the ecological significance
    SHANG Kan-kan;WANG Jie;YU Qian;ZHAO Ming-shui;DA Liang-jun-
    Journal of East China Normal University(Natural Sc    2011, 2011 (3): 134-144.  
    Abstract2872)      PDF (965KB)(2202)      

    The floristic composition, physiognomy and community structure of Liquidambar acalycina forests at the typical sites have been studied in this paper. The results showed that a total of 177 species of vascular plants were recorded,belonging to 128 genera and 65 families. The analysis of floristic geographical elements indicated that the areal-types are complicated and the dominant elements are of the temperate type. An analysis of life form spectrum and leaf characters showed that the physiognomy of these communities was characterized by phanerophytes with meso- and microphyllic-herbaceous simple leaves. In these forests, four distinct layers were distinguished from the forest floor to the canopy, namely the herb layer, the shrub layer, the subtree layer and the tree layer, respectively. In conclusion, the L. acalycina communities were remnant forests that characterized by deciduous phanerophytes with meso- and microphyllic-herbaceous simple leaves. The biogeography of L. acalycina forests were divided into the southern and northern part of mid-subtropical zone. The ratio of deciduous elements and cool-tolerated evergreen elements were increased while the latitude was raised. There were more Tertiary relict tree coexisted in the L. acalycina forests at higher latitude. Hence, more studies on evolution history and community dynamics of L. acalycina forests should been developed for explaining the origin and evolution of Liquidambar genus and the effects of ice age on Tertiary forests.

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    Diversity, spatial pattern and dynamics of vegetation under urbanization in Shanghai (Ⅵ): Community diversity and its structural characteristics of Shanghai Green Belt
    ZHANG Kai-xuan, CHE Sheng-quan, MA Shao-chu,WANG Rui, DA Liang-jun
    Journal of East China Normal University(Natural Sc    2011, 2011 (4): 1-14,74.  
    Abstract3025)      PDF (2712KB)(2439)      
    An investigation of plant communities was conducted in Shanghai Green Belt and 177 community plots were surveyed. The flora of vascular plant in the study area consisted of 226 species and varieties, 184 genera and 87 families. But a few species dominated the whole belt, the ratio of native trees being only 25%. There were 67 community types, which were divided into 7 vegetation types, most of them were deciduous broad-leaved forest and evergreen broad-leaved forest; however, few of them were of zonal vegetation types. The species diversity of these communities was low. The result showed that the average number of species in the tree layer was 1.68, and in that the shrub layer was 0.92. The community structure was simple, featured as a dumbbell: sparse in the middle and dense on both sides, and generally in the model of “tree with natural herb”. Most of trees are in poor growth.
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    Diversity,spatial pattern and dynamics of vegetation under urbanization in Shanghai(Ⅶ): Dynamics and a better construction method of the near-natural forest in Pudong of Shanghai for recent ten years
    DA Liang-Jun, YANG Jue, HUO Xiao-li
    Journal of East China Normal University(Natural Sc    2011, 2011 (4): 15-23.  
    Abstract2550)      PDF (647KB)(2143)      
    The near-natural forest was constructed in Pudong New Area of Shanghai in 2000. The study was made by tracking investigation on species composition of communities, plant density, plant height, DBH and soil nutrient. Results showed that: After ten years, forests showed a good growth. Species of plants maintained almost unchanged except for small amount of invasive species. However, due to the lack of shade, the mortality of evergreen tree species such as Castanopsis sclerophylla, Machilus thunbergii etc. was high at the first stage of construction. While Ligustrum lucidum and Liquidambar formosana showed a rapid growth and low mortality, gradually dominating the upper stratum, indicating deciduous broadleaved species gradually found their feet and showed up a more stable growth, with soil fertility rising more steadily than that in the early planting period. In response to the problems we found above, a planting model, the bi-synusia model of deciduous and evergreen trees of uneven aged, are put forward, which might play a guidance and reference role in building near-natural urban forests.
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    Diversity, spatial pattern and dynamics of vegetation under urbanizationin Shanghai(Ⅷ): Distribution of native terrestrial wild plants and their applications to urban greening in Shanghai
    TIAN Zhi-hui, CAI Bei-ming, DA Liang-jun
    Journal of East China Normal University(Natural Sc    2011, 2011 (4): 24-34.  
    Abstract3078)      PDF (1161KB)(2812)      
    Through consulting related data, a list of 534 native terrestrial wild plants species in Shanghai was built, which belonged to 65 families and 284 genera, and the distribution status of wild plants in different lands was investigated along a “urban-suburban-rural” gradient in Shanghai area, Sheshan mountain and Dajinshan island, expounding the diversity of terrestrial wild plants influenced by urbanization. By analyzing the families and genera compositions, areal types, life form and distribution status of species, the decisive role of the geographic location, size, habitat type and degree of urbanization for the composition of wild plants was illustrated. According to the distribution of species and adaptation to the environment, the native terrestrial wild plants in Shanghai were divided into five weeds types, such as eurytopic type, urban type, suburban type, suburb type and wild type. The significance and application of native wild plants in urban greening of Shanghai were analyzed.
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    Seedlings photosynthesis traits and non-structural carbohydrate storage of common species in Tiantong National Forest Park, Zhejiang Province
    ZHAO Lei, YANG Hai-bo, WANG Da-li,ZHANG Na, WANG Xi-hua
    Journal of East China Normal University(Natural Sc    2011, 2011 (4): 35-44.  
    Abstract3636)      PDF (742KB)(3543)      
    The photosynthesis traits and the storage of non-structural carbohydrate (NSC) of twenty common plants seedlings were studied in this case. The results are as follows. There are lower light compensation point (LCP), lower dark respiration rate (Rd), higher apparent quantum efficiency (AQE) and maximum net photosynthetic rate (Amax) in the seedlings of evergreen trees; while the deciduous species show the opposite results. The light saturation point (LSP) of evergreen shrubs is higher than that of evergreen trees. And the other photosynthetic paramaters have no significant difference. Roots are the key place of storage of NSC. The contents of sugar, starch and NSC in root and sugar in stem of evergreen trees seedlings are significantly higher than that of deciduous species, but the contents of starch and NSC in stem have no difference between them. The contents of sugar and NSC in root and starch and NSC in stem of evergreen shrubs are greater than that of evergreen trees, but the contents of starch in root and sugar in stem have no difference between them. Light-demanding species or pioneer species are the type of “fast-growth, low-storage”, and strong shade-tolerant evergreen shrubs are the type of “slow-growth, high-storage”, and photosynthetic capacity and carbohydrate storage of the semi-shade-tolerant evergreen trees are medium.
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    Leaf frost sensitivity and percentage of electrolyte leakage of the evergreen woody species in Tiantong region, Zhejiang Province
    ZHONG Qiang, KANG Meng, GUO Ming, WANG Xi-hua, WANG Liang-yan, YAN En-rong
    Journal of East China Normal University(Natural Sc    2011, 2011 (4): 45-52.  
    Abstract3409)      PDF (791KB)(2222)      
    In this study, leaf percentage of electrolyte leakage was examined by using respectively 26 ℃, 0 ℃ and -5 ℃ temperate treatments, to reflect the leaf frost sensitivity for 59 evergreen woody plants in Tiantong region, Zhejiang province. The objective was to select frost-resistant woody plants for establishing frost-tolerant plantations. The results showed: (1) the most evergreen woody plants acclimatized themselves to 0 ℃, indicating few leaf damage; whereas, -5 ℃ treatment led to a significant increase of leaf percentage of electrolyte leakage for all plants, suggesting a heavy leaf damage; (2) among three dominant families of plants, the frost-resistance was higher in Lauraceae and Fagaceae than in Symplocaceae; and (3) evergreen broadleaf plants was more frost-resistant than conifer species. Therefore, the frost-resistant plants belonging to Lauraceae and Fagaceae families should be preference species in afforestation.
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    Impacts of forest degradation and damage on soil respiration in the Tiantong region, Zhejiang Province
    GUO Ming, KANG Meng, ZHONG Qiang, WANG Xi-hua,DA Liang-jun, YAN En-rong
    Journal of East China Normal University(Natural Sc    2011, 2011 (4): 53-60.  
    Abstract2739)      PDF (387KB)(2172)      
    This paper chose climax evergreen broadleaf forests (EBLF) as a reference, then selected sub-climax forests, secondary coniferous forests, shrubs and grassland to represent different stages of forest degradation, and 4 logging stands to denote forests damage intensity, in the Tiantong region, Zhejiang province. To understand the impacts of EBLF degradation and damage on soil respiration, soil respiration rate and associated influencing factors were measured among above forests. The results showed that: (1) there was a pronounced seasonal pattern of soil respiration among forests; (2) soil respiration rate was the highest in climax EBLF and the grassland, intermediate in coniferous forests and shrub lands, and the lowest in sub-climax EBLF; (3) the logging did not affect soil respiration rate along the forest damage intensity; and (4) soil respiration was determined by soil C/N ratio and soil pH through forest degradation series; specifically, the main factor in the early stage was soil C/N ratio, and in the later stage of degradation was soil temperature. It was concluded that the controlling factor of soil respiration was shifted from biological-based to abiotic-based orientations, through forest degradation.
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    Sensitive periods of teratogenic effects of tributyltin on Xenopus tropicalis embryos
    YUAN Jing, ZHANG Xiao-li, YU Lin, LIU Jun-qi,CAO Qing-zhen, SHI Hua-hong
    Journal of East China Normal University(Natural Sc    2011, 2011 (4): 61-68.  
    Abstract2554)      PDF (1558KB)(2225)      
    Xenopus tropicalis embryos were exposed to 200 ng·L-1 tributyltin chloride (TBTCl) during different periods in the experiement of three days. The percent of survival embryos decreased by 10% in the 3rd, 20% in 3 d treatment groups, respectively. The whole body length reduced by 30% in the 2nd day, 20% in the 3rd day and 39% in 3 d treatment groups, respectively. More than 90% embryos showed malformations in treatment groups. The main characteristic malformations were abnormal eyes, enlarged proctodaeum, narrow fins or absence of fins, bent tails, etc. Compared with the control, the eyes were smaller in the 2nd day and bigger in the 3rd day treatment groups, respectively. The dorsal fins were a little narrower in the 1st day treatment group, both dorsal and ventral fins were much narrower with tail-tip residue or gap near the proctodaeum in the 2nd day treatment group, and the fins were slightly narrower in the 3rd day treatment group, respectively. The results suggest that the malformations in the eyes and fins were more sensitive to different exposure periods.
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    Study of the wave-induced seabed liquefaction failure of the Chengdao Sea at the Yellow River Estuary
    CHANG Fang-qiang, JIA Yong-gang
    Journal of East China Normal University(Natural Sc    2011, 2011 (4): 69-74.  
    Abstract2709)      PDF (1176KB)(2256)      
    The wave-induced seabed liquefaction is the main cause of gedegical disasters at the Chengdao Sea of the Yellow River Estuary, an oil production area. In this paper, a theoretical calculation model was established for assessing the seabed liquefaction, and calculating the liquefaction depth at different drills at the Chengdao Sea; further more, the direction of flow-slide was gotten. Through study some conclusions were gotten. (1) Under extreme sea conditions, the region with larger liquefaction depth lies at the central and southeastern of the Chengdao Sea, the weak soil layer up to 10 m can liquefy. The liquefaction depth can reach 4~8 m at the north, and liquefaction depth at the southwest is relatively little, 〖JP2〗within 3 m. (2) The flow-slide directions of the seabed after liquefaction are as follows, soil at north slide to north, soil at middle firstly slides to east and then to northeast, soil at the southeast may slide to southeast or be residual. The liquefaction depth and slide direction can be used for petroleum engineering design and construction reference.
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    Assessing the ecological assets in coastal zone using remote sensing data: a case study of Baoshan, Shanghai
    SU Pan-pan, GUO Zhong-yang, YE Shu-feng
    Journal of East China Normal University(Natural Sc    2011, 2011 (4): 75-82,93.  
    Abstract2237)      PDF (2987KB)(2224)      
    With remote sensing data, DEM and meteorological data of the coastal zone in Baoshan, Shanghai, we built a coastal indicators system for ecological assets assessment based on the specific ecosystem service of the area. Moreover, we evaluated ecological assets in coastal zone of Baoshan based on an improved total solar radiation model and an ecological total assets model. The results show that total ecological assets in coastal zone of Baoshan are, respectively, 3.226×109 ¥, 2.292×109 ¥ and 3.075×109 ¥ in 1998, 2005 and 2008; it decreases 28.94% and has an average 4.13% reduction per year from 1998 to 2005, and increases 34.16% and has an average 11.39% rise per year from 2005 to 2008. At the same time, the wetland has dominant contribution for the ecological assets in coastal zone, accounting for 92.47% in 1998, 89.91% in 2005 and 92.92% in 2005, respeclively. With driving force analysis, we find that socio-economic factors like population growth, urban planning, and natural factors such as temperature, precipitation and vegetation, are the main reasons for the change of ecological assets in coastal zone of Baoshan, Shanghai.
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    Numerical simulations of effects on urban PBL characters with landuse categeories modification
    ZHANG Chi, SHU Jiong
    Journal of East China Normal University(Natural Sc    2011, 2011 (4): 83-93.  
    Abstract4343)      PDF (1102KB)(4320)      
    ENVI, IDL, GIS and aerial photographs were used to modify landuse data in ARW-WRF within Shanghai area. Firstly, grids were gained with GIS into the same resolution with the input data in WRF, which is too old for present landuse situation in Shanghai. Secondly, irrigated cropland and pasture, grassland, shrubland, loamy sand and silt were partly changed into urban and built-up land grid by grid, so as to be more closer to real situation, and the distribution of buildings was gained, helping to reach more accurate roughness value in UCM according to the 24 landuse categories defined in WRF model. Lastly, both modified and original data were input into WRF in case simulations. The wind field, temperature, and other characters of PBL in spring of Shanghai were gained in the simulation results. It shows that because of landuse types modification, horizontal wind velocity decreases obviously, displaying the urban dragging effects. Meanwhile, the vertical wind velocity increases, being greatly affected by surface warming effects. The higher temperature centers appear in the downwind direction by the effects of surface wind fields. Surface temperature and PBL height are both closer to observation values. The results lead us to discuss the importance of landuse categories input in models, and some other possible reasons causing the difference were mentioned.
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    αCaMKII overexpressions enhance excitatory synaptic transmission in insular cortex of mice
    LIU Ru-qing, DUAN Yan-hong, CAO Xiao-hua
    Journal of East China Normal University(Natural Sc    2011, 2011 (4): 94-103,123.  
    Abstract2513)      PDF (1882KB)(2439)      
    The experiment was designed to study basic electrophysiological characteristics and basal synaptic transmission of insular pyramidal cells in αCaMKII forebrain overexpression mice by patch clamping. The basic electrophysiological results showed that there were no significant differences in the resting membrane potential, action potential and I-V curve of pyramidal cells in insular cortex between wild type and transgenic mice. No significant difference was measured in the frequency of sEPSCs and mEPSCs. However, compared to the wild type mice, transgenic mice exhibited augmented amplitude of sEPSCs and mEPSCs. There was also no significant difference in PPF curve. The results suggested that forebrain specific overexpression of αCaMKII did not change the basic electrophysiological characteristics and presynaptic transmitter release in insular cortex. The influence of αCaMKII overexpression on the amplitude of EPSCs may be mediated by postsynaptic receptors.
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    Pharmacokinetics and tissues distribution of rosiglitazone in rats
    ZHANG Ling-hong, DUAN Ya-le, LI Yu-bo, WAN Xue-mei, ZHAO Zheng
    Journal of East China Normal University(Natural Sc    2011, 2011 (4): 104-114.  
    Abstract2169)      PDF (1055KB)(2021)      
    A simple, rapid and selective HPLC method was developed and validated to determinate rosiglitazone in rat plasma, tissues and cerebrospinal fluid. Samples were prepared, with a higher extraction recovery (96.72% in plasma, 95.63% in tissues and 90.67% in cerebrospinal fluid), based on a simple methanol protein precipitation. Assay of rosiglitazone was achieved on a reversed-phase C18 column (250 mm× 4.6 mm, 5 μm) with a mobile phase consisting of acetonitrile and 20 mmol/L ammonium acetate pH 6.0 (53∶47, v/v) at a flow rate of 0.6 mL/min. The method was applied to study pharmacokinetics, distribution of rosiglitazone in rats after a single intragastric administration. The rosiglitazone was rapidly absorbed (Tmax 0.5~1 h) with an elimination half-life of 2.5 hours. The highest levels of the drug were observed in liver and fat while the lowest levels in the brain and spleen. The method was also used for the determination of rosiglitazone in cerebrospinal fluid. The result showed that rosiglitazone can be detected in cerebrospinal fluid, thus providing direct evidence that rosiglitazone can permeate cross blood brain barrier.
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    Meta-analysis of CYP1A1 polymorphisms and lung cancer risk among smokers
    CAI Yan-yan, TAN Xiao-ming, ZHENG Hong-xia, GU Hai-ying, ZHAN Xiao-ying, WU Qi-han
    Journal of East China Normal University(Natural Sc    2011, 2011 (4): 115-123.  
    Abstract3293)      PDF (1660KB)(2624)      
    All of the publications were eligible from Medline and Pubmed databases and the information about relationship between CYP1A1 Ile462Val and Msp1 polymorphisms and lung cancer risk among smokers was summarized. Meta-analysis was performed using RevMan 4.2. 29 case-control studies were available. For Ile462Val, meta-analysis revealed that the risk of lung cancer among smokers with Val/Val and Ile/Val genotypes was 1.29 times of those with Ile/Ile genotype (P<0.05) by the random effects model. There was no significant correlation between Msp1 and lung cancer among smokers or non-smokers. These results suggest that CYP1A1 Ile462Val polymorphism is related to the susceptibility of lung cancer among smokers.
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    Community structure and biodiversity of birds in Tuohu Nature Reserve, Anhui Province
    BAO Fang-yin, WANG Song, ZHANG Tao, WANG Bang-zheng, CUI Feng
    Journal of East China Normal University(Natural Sc    2011, 2011 (4): 124-133.  
    Abstract3007)      PDF (670KB)(2334)      
    During April 2008 to May 2009, a sysmetic bird community survey was conducted in Tuohu Nature Reserve, Anhui Province, China. A total of 69 species belonging to 13 orders 33 families were recorded, of which 42 species belong to Palaeartic birds (62.0%), and 6 species to Oriental (8.5%). The species of Paleartic are dominant, and in terms of migration 12 species (16.9%) are residents, while 57 species (83.1%) are migratory birds,of which 2 species are in the national grade-one protection list, 6 species in the national grade-two protection list ,and 31 species in Anhui provincial protection list. The bird species diversity shows clear seasonal variation. The management of the protection of the birds, as well as local resources, is also discussed in this paper. Bird diversity index varies with seasons and the living environment. The data shows that diversity index of the habitat of mire is the maximum (1.368 1), and next to it is the habitat of forest (1.258 6), farmland (0.805 9) and water body (0.739 0). However, the habitat of residential area is the minimum (0.642 0). The evenness index of water habitat (0.380 0) is the maximum, and next to it is that of the mire (0.376 1), forest (0.360 0) and farmland (0.314 2). After all, the index of residential area is the minimum (0.267 7). In Huaihe River Basin, Tuohu Lake survives the winter and thus serves as an important route in the migration for the multitudinous waterfowls on the way, and the function of this basin wetland waterfowl protection. The results indicate that the water birds are facing the threats from the environmental degradation and human activity in the area.
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    Maximum-norm superapproximations for tensor-product quadratic rectangular finite elements in 4D
    DENG Yi-jun
    Journal of East China Normal University(Natural Sc    2011, 2011 (4): 135-141.  
    Abstract2508)      PDF (448KB)(1976)      
    For Dirichlet boundary value problems of Poisson equations, an interpolation operator of projection type in 4D was established. Then by using this operator, weak estimates for tensor-product quadratic rectangular finite elements over regular partitions of a domain were obtained. Based on the obtained results and the estimates for the four-dimensional discrete Green's function, some highly accuracy results of the maximum-norm superapproximations of finite elements were derived.
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    Inequalities for unitarily invariant norms
    ZOU Li-min, FENG Yu-ming
    Journal of East China Normal University(Natural Sc    2011, 2011 (5): 1-4.  
    Abstract4204)      PDF (134KB)(467)      
    First, some inequalities for unitarily invariant norms were given and proved. Then these inequalities with previous results were compared. The result showed that the new inequalities are the refinement of old ones.
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    Rank characterizations of some matrix partial orderings
    WANG Hong-xing
    Journal of East China Normal University(Natural Sc    2011, 2011 (5): 5-11.  
    Abstract2441)      PDF (225KB)(572)      
    Applying the representations of {1}-inverse, {1,3}-inverse, {1,4}-inverse and {1,5}-inverse, the representations of the star, left-star, right-star and the Sharp partial orderings were given by using rank equalities, respectively.
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    Global robust exponential stability of high-order cellular neural networks with S-type distributed delays
    MA Cheng-rong
    Journal of East China Normal University(Natural Sc    2011, 2011 (5): 12-20.  
    Abstract2292)      PDF (708KB)(422)      
    By applying analysis techniques and constructing suitable Lyapunov functional with Lebesgue-Stieljes integration, some sufficient conditions on global exponential stability are obtained, which are easily verifiable. Finally, an example is given to illustrate the effectiveness of the main results derived.
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    On the crossing numbers of K2,3 V C n
    YUAN Xiu-hua
    Journal of East China Normal University(Natural Sc    2011, 2011 (5): 21-24.  
    Abstract2077)      PDF (252KB)(431)      
    By connecting the vertices of K_2,3$ to the vertices of Cn, a join graph denoted by K_2,3 V Cn was obtained. By utilizing some results of the crossing number of complete multipartite graphs and comparing K_2,3 V Cn to K_2,3,n, we proved that the crossing number of K_2,3 V Cn is Z(5, n)+n+3.
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    Numerical method of financial product pricing linked to gold
    ZHEN Li-jun, ZHANG Xing-yong, NIU Cheng-hu, LI Wei
    Journal of East China Normal University(Natural Sc    2011, 2011 (5): 25-32.  
    Abstract2344)      PDF (1177KB)(541)      
    For the problem of price a financial product linked to the gold pricing which has the property of double barrier options,this article provided an improved Crank-Nicolson calculation method to get the numerical solution, then verified the feasibility of this method via Matlab.This method, combined with the Pade schemes in the theory of semigroup operators, not only handled the problems of divergent near the obstacles spots, but also retained the strong advantages of high precision and stability of the Crank-Nicolson method. On this basis, the paper discussed the influence of the price of the product with different market volatility, interest rates and the risk-free rate. Finally, the numerical examples indicate that this method coincides the actual situation well.
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    On the Holder continuity of generalized vector equilibrium problems
    FANG Zhi-miao, WANG Li-na
    Journal of East China Normal University(Natural Sc    2011, 2011 (5): 33-41.  
    Abstract2523)      PDF (185KB)(401)      
    Based on the assumptions of weaker strong pseudomonotonicity, the Holder continuity of the solution mappings to parametric generalized vector equilibrium problems in metric spaces was investigated. Examples were given to illustrate applications of the result. The results extend the recent ones in the literature.
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    Minimax inequalities for vector-valued mappings
    ZHANG Yu, CHEN Tao, XU Yan-dong
    Journal of East China Normal University(Natural Sc    2011, 2011 (5): 42-48.  
    Abstract2393)      PDF (240KB)(304)      
    By using a kind of nonlinear scalarization functions and nonconvex separation theorems, under weaker assumptions, the minimax theorem for vector-valued mappings was established. An example was given to illustrate that the result improves the corresponding ones in the literatures.
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    A Class of second-order approximating sets and derivatives
    LIAO Chun-mei, LI Ming-hua
    Journal of East China Normal University(Natural Sc    2011, 2011 (5): 49-59.  
    Abstract2909)      PDF (194KB)(383)      
    A class of second-order approximating sets and second-order derivatives were introduced. The relationships among second-order approximating sets were discussed. Finally, by using so-called second-order approximating Φ-contingent set, second-order differential properties of a class of set-valued maps were investigated.
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    Asymptotic solution for a class of impulsive differential equations
    WU Li-meng, NI Ming-kang, LU Hai-bo, ZHENG Yan
    Journal of East China Normal University(Natural Sc    2011, 2011 (5): 60-65.  
    Abstract2425)      PDF (253KB)(463)      
    By means of singular perturbation theory, We constructed the singularly perturbed problem for the impulsive differential equation problem, and proved that the solution of the derived problem approximated to the solution of original problem, indicating a new way for the study of impulsive differential equations. By virtue of boundary function method, we not only constructed
    continuous formal asymptotic solution but also proved the existence of solution, meanwhile the remainder estimate was presented. Finally, an example was given to illustrate the results.
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    Existence of positive solutions of second-order discrete Neumann boundary value problems with variable coefficients
    LU Yan-qiong, GAO Cheng-hua
    Journal of East China Normal University(Natural Sc    2011, 2011 (5): 66-72,102.  
    Abstract2571)      PDF (349KB)(448)      
    By using the fixed-point index theorem, the optimal conditions of the existence of positive solutions to a class of the second-order discrete Neumann boundary value problems was obtained. It extended the previous results concerning the Neumann boundary value problems in ODE cases to that in the discrete cases.
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    H-oscillation of a class of second-order vector neutral partial differential equations with damped terms
    CAI Jiang-tao
    Journal of East China Normal University(Natural Sc    2011, 2011 (5): 73-78.  
    Abstract2435)      PDF (253KB)(397)      
    The H-oscillation of a class of second-order vector neutral partial differential equations with damped terms and continuously distributed delays were transformed into the problems of which differential inequalities haven't eventually positive solution by employing the method of reducing dimension with the inner product and making use of Riccati transformation and introducing parameter functions. Some criteria of sufficient conditions for the H-oscillation of all solutions of the equations are obtained under Robin boundary value condition.
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    Existence of multiple solutions for singular elliptic equations involving critical exponents with Neumann boundary condition
    CHEN Zi-gao
    Journal of East China Normal University(Natural Sc    2011, 2011 (5): 79-87.  
    Abstract2440)      PDF (306KB)(295)      
    By using variational methods, the existence and multiplicity of weak solutions for Neumann boundary problem for some singular elliptic equations involving critical Sobolev-Hardy exponents and Hardy terms was studied on bounded domain Ω included by R^N. If f(x,t) satisfies the non-quadratic condition, based on the dual fountain theorem and the means of straightening the boundary, we proved that there exists λ*>0 such that for any λ∈(0,λ*), this problem has a sequence of solutions {u_k} W^{1,2}(Ω) such that J(u_k)<0 and J(u_k)→0 as k→∞.
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    U-supplemented subgroups and p-nilpotency of finite groups
    LI Chang-wen, HU Bin
    Journal of East China Normal University(Natural Sc    2011, 2011 (5): 88-92.  
    Abstract2266)      PDF (165KB)(444)      
    The influence of U-supplemented subgroups on the structure of finite groups was investigated. Some conditions of p-nilpotency under assumption that some primary subgroups (for example, 2-maximal subgroups of Sylow subgroup) are U-supplemented were established. Meanwhile, some new characterizations of a group belonging to a given formation of finite groups were obtained. As an application, a series of previously known results are unified and generalized.
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    Leibniz algebras defined by tensor product of Lie algebras
    YAN Qian-qian
    Journal of East China Normal University(Natural Sc    2011, 2011 (5): 93-102.  
    Abstract2627)      PDF (291KB)(247)      
    By the definition of $\mathrm{Leibniz}$ algebra, we showed that \ $\mathcal{G}\otimes\mathcal{G}$\ was a $\mathrm{Leibniz}$\ algebra when \ $\mathcal{G}$\ was a $ \mathrm{Lie}$ algebra. We also proved that $\mathcal{G}\otimes\mathcal{G}$\ and $\mathcal{G}$\ have the same dimension of invariant symmetric bilinear forms in a special case, and the dimension of the derivation algebra of\ $\mathcal{G}$\ is always less than that of $\mathcal{G}\otimes\mathcal{G}$. $\mathcal{G}\boxtimes\mathcal{G}$\ is one of the important \ $\mathrm{Lie}$\ algebra induced by $\mathcal{G}\otimes\mathcal{G}$, and $\mathcal{G}\boxtimes\mathcal{G}$\ is isomorphic to $\mathcal{G}$\ when $\mathcal{G}$\ is a finite dimensional semi-simple\ $\mathrm{Lie}$\ algebra.
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    Note on representations of Cartan type Lie algebras over a finite field
    YAO Yu-feng
    Journal of East China Normal University(Natural Sc    2011, 2011 (5): 103-114.  
    Abstract2450)      PDF (243KB)(279)      
    A sufficient and necessary condition was obtained for an irreducible generalized $\chi$-reduced module of a Cartan type Lie algebra over $k=\bar{\mathbb{F}}_q$ being split over ${\mathbb{F}}_q$, where the height of the character $\chi$ is no more than 0. For the Witt algebra, the corresponding result for general $\chi$ was given.
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    Cohomology of reductive modular Lie algebras
    LI Yi-yang
    Journal of East China Normal University(Natural Sc    2011, 2011 (5): 115-120,132.  
    Abstract2485)      PDF (367KB)(388)      
    Let $G$ be a connected reductive algebraic group over an algebraically closed field $k$ of prime characteristic $p$, and $\mathfrak{g}=\mathrm{Lie}(G)$. This paper studied the cohomology of the reductive Lie algebra $\mathfrak{g}$ with $p$-character $\chi$ of standard Levi form. When the highest weight of baby Verma module is $p$-regular, the necessary and sufficient condition for the Ext groups between baby Verma module and twist baby Verma module being non-split was gotten.
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    SHI Guo-hong
    Journal of East China Normal University(Natural Sc    2011, 2011 (5): 121-132.  
    Abstract1610)      PDF (402KB)(426)      
    null
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    Methods of extracting distribution information of plants at urban darken areas and repairing their brightness
    ZHOU Jian-hua, ZHOU Yi-fan, GUO Xiao-hua, REN Zhen
    Journal of East China Normal University(Natural Sc    2011, 2011 (6): 1-9.  
    Abstract2327)      PDF (5432KB)(2843)      
    In the urban built-up areas with densely high-rising buildings, about 20% of landscape vegetation is growing at darken areas shaded by buildings or other higher plants. In order to drive a model of measuring captured carbon by remote sensing, one of the puzzles to be solved firstly is to separate and extract those plants at darken areas. So a new conception of NDUI (Normalized Difference Umbra Index) has been put forward here. With NDUI, the total area of landscape vegetation is extracted from an infrared remote sensing image by means of NDVI (Normalized Difference Vegetation Index), and then the plants at darken areas are separated from the total area through another segmentation threshold referring to NDUI. These separated plants at darken area can be enhanced with an algorithm of repairing brightness. It is demonstrated by experiments that the algorithm proposed here can work robustly to meet the requirement.
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    Spatial and temporal variations and mechanism of the tidal level and range in the North Branch of the Changjiang Estuary
    SONG Yong-gang, ZHU Jian-rong, WU Hui
    Journal of East China Normal University(Natural Sc    2011, 2011 (6): 10-19.  
    Abstract2916)      PDF (2147KB)(2744)      
    With the combined effects of the river discharge, tide and wind stress, the spatial/temporal variations as well as the dynamical mechanism of the tidal level and tidal range in the North Branch of the Changjiang Estuary were numerically simulated and quantitatively analyzed in this paper. The monthly mean tidal level in the North Branch is increased gradually from January to July and decreased gradually from October to December. It mainly depends on the residual water level, which is determined by the amount of the river discharge. The tidal range experiences a seasonal variation, with two maximum and two minimum values in a year. These two maximum values appear in March (the second lunar month) and September (the eighth lunar month), and the two minimum ones appear in June (the fifth lunar month) and December (the eleventh lunar month), respectively. The highest and lowest tidal levels at the Qinglonggang station are mainly determined by the intensity of tidal forcing, and associate with the seasonal variations of the tide and river discharge. The averaged, highest and lowest tidal levels represent a landward increment feature along the North Branch. The tidal range is increased gradually from the mouth to the middle reaches of the North Branch, and decreased from its middle reaches to its upper reaches. The northerly wind in winter tends to produce an increment of the tidal level at the Qinglonggang, and the southerly wind in summer tends to produce a slight decrement of the tidal level and range there. The wind stress has almost no effect on the tidal range in the North Branch. The river discharge increases the tidal level, restrains the tide, and decreased the tidal range.
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    Risk assessment of typhoon hazard factors in China coastal areas
    NIU Hai-yan, LIU Min, LU Min, QUAN Rui-song, ZHANG Li-jia,WANG Jing-jing, XU Shi-yuan
    Journal of East China Normal University(Natural Sc    2011, 2011 (6): 20-25,35.  
    Abstract4427)      PDF (1915KB)(2890)      
    Three indexes were chosen to establish a hazard assessment index system and model from wind, rain and storm surges . Then in a GIS environment, the risk of typhoon hazard factors were assessed. The assessment result showed that the risk of typhoon hazard factors is higher in Hainan province and the coastal areas of Guangdong, Fujian, Zhejiang provinces; Shanghai and the coastal areas of Guangxi, Jiangsu provinces have medium risk of typhoon hazard factors together with the inland areas of Guangdong, Fujian, Zhejiang provinces; while in Beijing, Tianjin, Liaoning, Hebei, Shandong provinces and the inland areas of Guangxi, Jiangsu provinces, the risk is lower. The result is valuable to provide reference for China coastal areas to deal with disasters.
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    Simulation of circulation and sea temperature in the Northwest Pacific
    SHEN Qi, ZHU Jian-rong, DUAN Yi-hong, SUN Ming-hua
    Journal of East China Normal University(Natural Sc    2011, 2011 (6): 26-35.  
    Abstract3356)      PDF (5971KB)(3607)      
    Based on the ECOM-si, the circulation and temperature in the Northwest Pacific were simulated. The model includes the water flux at the lateral open boundaries, sea surface wind stress, heat flux, evaporation and precipitation at sea surface and so on. The model validation shows that the simulated sea temperatures are consistent with the section data, which were measured by Japan in the Northwest Pacific in each month of 2008. The model reproduces the North Equatorial Current, which flows westward at the surface in the low latitude Pacific, Kuroshio, which is a strong western boundary current, the Taiwan Warm Current and Tsushima Warm Current, the Coastal Current and Yellow Sea Warm Current and so on. In addition, the sea temperature distribution in the Northwest Pacific as well as in the South China Sea, East China Sea and Yellow Sea is also simulated by this model.
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    Performance of fluoride removal by Fe(Ⅲ)-modified resin
    WU Cheng-cheng, TIAN Hao-ting, ZHAO Ya-ping
    Journal of East China Normal University(Natural Sc    2011, 2011 (6): 36-46,74.  
    Abstract3303)      PDF (3310KB)(2627)      
    Fluoride adsorption on Fe(Ⅲ) modified macroporous sulfonic acid resins has been investigated through batch experiments. The adsorption of fluoride on Fe(Ⅲ)-modified resins is independent of pH value,and the saturated adsorption capacity increase with the increase of temperature. The adsorption thermodynamics follows the Langmuir and Freundlich isotherm. The adsorption kinetic follows Elovich kinetic and the pseudo-second-order kinetic equation. The common foreign ions in drinking water do not obviously influence on the adsorption capacity of fluoride. The adsorbent shows good dynamic performance in column experiments. Results show that the Fe-modified resins would be a promising adsorbent for fluoride removal from drinking water.
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    Effects of nutrient management on nutrient utilization of N,P and nitrate accumulation in lettuce
    NIAN Yao-ping, XIA Ti-yuan, HE Ming-zhu,ZHANG Jun-guo, DA Liang-jun
    Journal of East China Normal University(Natural Sc    2011, 2011 (6): 47-56.  
    Abstract2984)      PDF (810KB)(2429)      
    By method of the field plot trial, the experiment was carried out in Dianchi Lake basin to study the influence of different nitrogen and phosphorus fertilizing on lettuce (Lactuca sativa var. ramosa) production, nitrate content and nutrient utilization of N, P. 9 treatments were denoted by T1-T9, respectively. The results showed that: ① The lettuce production of T3(N90P126K180) was higher than other treatments, reaching 28 968.75 kg/ha; except for treatment of T4(N180P126K180)、T5(N270P126K180) and T8(N180P189K180), the contamination levels of nitrate content of the others came out to be Lv.4; after comprehensive consideration on nutrient utilization of N, P, the nutrient utilization of Lettuce showed to be higher after treatments of T4(N180P126K180) and T9(N90P63K180) with 17.42%,2.10% and 20.14%,2.05% respectively. ② Under the same amount of potash fertilizer and the treatment of appropriate nitrogen and phosphorus fertilizers match fertilizing, the corresponding lettuce production, nitrate content and N, P fertilizer nutrient utilization were superior to treatments of partial fertilization or high fertilization. Therefore, control of nitrogen and phosphorus fertilizing, reasonable optimization of ratios of nitrogen and phosphorus will improve the nutrient utilization and vegetables quality, which is of great importance for source controlling the agricultural non-point pollution.
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    Study on the purification effects of aquatic plant floating-beds for urban polluted water
    ZHAO Feng, ZHANG Yong, HUANG Min-sheng, WU Xiao-hui,ZHANG Yi-fan, HE Yan
    Journal of East China Normal University(Natural Sc    2011, 2011 (6): 57-64.  
    Abstract3045)      PDF (1048KB)(2585)      
    Three kinds of ecological floating-beds were made of Hydrocotyle vulgaris, Nymphaea tetragona and Iris sibirica, respectively, to study their purification effects on removing pollutants of urban polluted water. The experiment lasted for 35 days. The results indicated that the three aquatic plants were adaptable to grow in the urban polluted water, and their biomass, height and root increased significantly at the end of the experiment. The growth rates were Nymphaea tetragona>Hydrocotyle vulgaris>Iris sibirica. Three plants had strong ability to remove CODCr, NH+4-N, TN and TP, which were higher than that in the control treatments (P<0.05). The removal rates of TN by Hydrocotyle vulgaris, Nymphaea tetragona and Myriophyllum verticillatum were 90.0%, 85.7% and 81.2%, respectively. In addition, the removal rates of TP by Hydrocotyle vulgaris, Nymphaea tetragona and Myriophyllum verticillatum were 68.6%, 57.0% and 62.8%, respectively. Based on their significant effects on nitrogen and phosphorus removal, the three plants are recommended as species of aquatic plants in ecological restoration engineering of urban polluted water.
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    Effects of tributyltin on mRNA expressions of thyroid hormone response genes in Xenopus tropicalis tadpoles
    CAO Qing-zhen, ZHU Pan, YUAN Jing, ZHANG Xiao-li,LIU Jun-qi, HUANG Min-sheng, SHI Hua-hong
    Journal of East China Normal University(Natural Sc    2011, 2011 (6): 65-74.  
    Abstract2535)      PDF (4228KB)(2431)      
    Xenopus tropicalis tadpoles (NF51) were exposed to TBT for 48 and 96 h, respectively. Exposures to 50 and 200 ng·L-1 TBTCl showed no effects on the survival rate of tadpoles. The expression of TRβ and DI3 mRNA were significantly increased in the tails by 1~2.3 fold in the groups treated with 50 ng·L-1 TBTCl. The expression of TSHβ mRNA was increased in the tails by 2 fold after 48 h of exposure. RXRα mRNA was decreased by 0.4 fold in the brains and tails, and RXRβ mRNA was increased by 5.9 fold in the tails after 96 h of exposure. MCT8 mRNA was increased by nearly 3 fold in the tails in 50 ng·L-1 TBT treatment group and decreased by 3 fold or so in the brains in 50 ng·L-1 TBT treatment group after 96 h of exposure. These results suggest that TBT can result in the changes of multiple mRNA expressions and show high tissue-specific differences. These mRNA are involved in the synthesis, transportations, transformations and actions, which indicate that TBT shows thyroid hormone disrupting effects. The changes of related mRNA expressions indicate that TBT might disrupt the thyroid hormone system of tadpoles by binding with retinoid X receptor. Therefore, biomarkers are not only cost-effective and sensitive endpoints in screening the thyroid disrupting chemicals but also useful in identifying the mode of action of contaminants.
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    Ultrastructure of the microtubular cytoskeleton in Euplotes eurystomus(Hypotrichous, ciliophora)
    SHENG Xin, LI Qi-li, ZHANG Xiao-cui, ZHAI Nan, GU Fu-kang
    Journal of East China Normal University(Natural Sc    2011, 2011 (6): 75-80,107.  
    Abstract2819)      PDF (4683KB)(2600)      
    Ultrastructure of the ciliature and cortical non-ciliated microtubular cytoskeleton in the Hypotrichous ciliate, Euplotes eurystomus were revealed using transmission election microscopy. The results show the former is consist of not only cilium and basal bodies but also their linking-fibrous, the basal body bracket, the associated microtubules and the fibrillar cirral basket; However, the latter is consist of the subpellicular microtubule layers, the microtubules in the subpellicular granular layer, the cytoplasmic microtubules and the microtubules in the cortical preiection-layers. These results offer some basic information for revealing the construction details of cortical microtubular cytoskeleton of hypotrichous ciliate in depth.
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    Analysis of hippocampal ripple osillations by application of Kalman filter
    ZHANG Lu, LIN Long-nian
    Journal of East China Normal University(Natural Sc    2011, 2011 (6): 81-88.  
    Abstract2451)      PDF (1260KB)(2443)      
    This paper studied high frequency ripple (100~200 Hz) oscillations in hippocanpal CA1 area by applications of adaptive autoregressive (AAR) model and Kalman filter. Compared with traditional real time frequency analysis of time seies based on short term Fourier transfrom (STFT), improved time and frequency resolutions in time-frequency representation could be achieved by parametric methold obtained by AAR model and Kalman filter algorithms. Thus, the occurance of ripple oscillations and the variation of ripple power could be addresed more accurate by Kalman filter than that of STFT.
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    Identification of genes associated with age-related memory impairment in rats
    ZHANG Shuang, WANG Lin, DONG Su-zhen
    Journal of East China Normal University(Natural Sc    2011, 2011 (6): 89-99.  
    Abstract2287)      PDF (372KB)(2209)      
    A large body of evidence indicates that memory impairment is associated with normal aging. Interestingly, some older individuals do not show any memory loss. To understand the molecular mechanisms of the age-related memory disorder, gene expression profiles of hippocampus and entorhinal cortex from 24-month-old memory-impaired and maze were examined using high-density DNA microarrays. The results demonstrated that 47 genes in the hippocampus and 37 genes in the entorhinal cortex showed dynamic changes in their expressions levels. Surprisingly, the overall patterns of gene expression changes in these two brain regions were significantly different. Nevertheless, a number of key genes involved in structure organization, neurotransmission, signaling transduction, transcription, immunity and oxidative signaling were differently expressed in both brain regions. These genes and signal pathways may play essential roles in the regulation of memory. Our results provided important information for understanding the molecular mechanism of age-related memory impairment.
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    Den habitat selection of China bamboo-rat (Rnizomys sinehsis) in spring
    YUAN Bao-dong
    Journal of East China Normal University(Natural Sc    2011, 2011 (6): 100-107.  
    Abstract3382)      PDF (412KB)(2740)      
    Den habitat selection of the China bamboo-rat (R. sinehsis) was investigated from January to April in 2009 in Yuanbaoshan Nature Reserve, Guangxi. Thirteen ecological factors were recorded in 10 m×10 m plots of 85 samples, including 54 used samples and 31 unused samples. The data were analyzed by frequency analysis and Mann-Whitney U test. The results showed that the difference among the canopy density, the distance to human disturbance, the shelter of wind, the shrub density, the distance to shrubs, the elevation and the food abundance were significant (P<0.05); while the difference among the water distance, the slope, the aspect, the slope position, the tree density and the tree distance were not significant (P>0.05). The habitat selection shared the following ecological factors: the well canopy density, the well shelter of wind, the well food richness, the slope among 20 to 40 degrees,the aspect toward east or south,the slope position with uphill or middle place, the elevation more than 1 800 m, the tree density less than 30 ind./plot, the distance to tree about 2 to 5 m,the shrub density about 1 000 to 5 000 m, the distance to shrubs less than 0.1 m,far away to water( more than 500 m) and the human disturbance distance more than 1 000 m. Principle component analysis indicated that the shelter, the water, the geography, the human disturbance and the food abundance affected the habitat character of the China bamboo-rat in spring.
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    Ex-treatment of immunoassay method for nodularin and cylindrospermopsins
    LI Shuang, YIN Hao-wen
    Journal of East China Normal University(Natural Sc    2011, 2011 (6): 108-114.  
    Abstract2722)      PDF (349KB)(2185)      
    Effective solid phase extraction (SPE) ex-treatment method and sensitive enzyme-linked immunosorbent asssay (ELISA) were developed for determining the nodularins(NOD) and cylindrospermopsins(CYN) in water samples. Due to the different polarities, two different ex-treatment methods were applied to NOD and CYN, respectively. The methods were developed as followed: ① For NOD,firstly the C18 column was activated by 10 mL methanol and 10 mL Milli-Q water; then the sample was applied to the column at 3-4 mL/min; after washing the column with 10 mL water, the NOD was eluted with 10 mL methanol; then the eluent was dried up with a rotary evaporator, and lastly the final volume was fixed to 1 mL with Milli-Q water for ELISA analyse. ② For CYN, the carb SPE tubes were activated with 10mL methanol and 10mL Milli-Q water; then the sample was applied to the tubes at 2-3 mL/min; after washing the tubes with 10mL methanol, the CYN was eluted with 12 mL methanol containing 0.1% trifluoroacetic acid;then the eluent was dried up with a rotary evaporator, lastly the final volume was fixed to 1 mL with Milli-Q water containing 0.1% ammonia for ELISA analyse. The results indicated that these methods can guarantee the good recoveries of NOD and CYN for ELISA analyse, which could reach to 94.3% and 77%, respectively.
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    Isolation and identification of the fungi which can convert Panax Notoginseng extract into ginsenoside Rg3
    WANG Qing, YUAN Ping, MAO Ren-gang, WANG Ju-yong, ZHENG Zhan
    Journal of East China Normal University(Natural Sc    2011, 2011 (6): 115-121,151.  
    Abstract2421)      PDF (1605KB)(2575)      
    Twenty-three strains were isolated from soil where ginseng grew. The Panax Notoginseng extract were analyzed by TLC and HPLC. There were nine strains which can converte Panax Notoginseng extract into highly active ginsenoside, among which the TR-20 was the best one. Moreover, the TR-20 can convert Panax Notoginseng extract into ginsenoside Rg3(190.2 mg/L). The TR-20 was Aspergillus (Aspergillus sp.) with observation of morphology and cultural characteristics.
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    Study on meta-zooplankton community structure of Dianshan Lake
    FENG De-xiang, LIU Yi, YU Na, CHEN Liang, LI Er-chao, CHEN Li-qiao
    Journal of East China Normal University(Natural Sc    2011, 2011 (6): 122-131.  
    Abstract3084)      PDF (1428KB)(2542)      
    The investigation of the community structure of zooplankton in Dianshan Lake was undertaken monthly during October 2008 to October 2009, including species composition, standing crop dynamics and diversities. A total of 80 metazooplanton species including 46 Rotifera (58%), 21 Cladocera (26%) and 13 Copepoda (16%) were encountered. The dominant species were five species of rotifera (Keratella cochlearis, Keratella quadrata, Keratella valga, Brachionus calyciflorus and Brachionus diversicornis), three species of copepod (Microcyclops leuckarti, Sinocalanus dorrii and Schmackeria forbesi) and two other species of cladocera which showed a trend of miniaturization (Bosmina longirostris, Brachionus coregoni and Moina micrura). The zooplankton mean density was 356±334 ind./L and ranged from 52 ind./L in May 2009 to 1260 ind./L in December 2008, and the zooplankton average biomass was 12.67±12.53 mg/L, with the highest value in July 2009 and lowest in December 2008, which was 40.85 mg/L and 1.45 mg/L respectively. Regarding the distribution of the sampling sites, the highest values of the yearly mean density and biomass both appearred in Site 11, and the lowest density in Site 9 with the lowestbiomass in Site 7, respectively. The value of Shannon-Wiener index(H) in Dianshan Lake fluctuated between 0.841 and 2.187, with 1.718 as average. Upon the evaluation of biological diversity index, the water quality of Dianshan Lake could be regarded as α mesosaprobity according to the results analysis.
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    Research on separation method of highly polar compound DMC and impurities in it by HILIC
    HAN Bing-bing, WANG Cui-cui, LI Xin-jun, ZOU Xin-zhuo
    Journal of East China Normal University(Natural Sc    2011, 2011 (6): 132-138.  
    Abstract3287)      PDF (1517KB)(2390)      
    HILIC method was established to separate and analyze highly polar compound methacryloyloxyethyl trimethyl ammonium chloride (DMC) and its impurities. Using two different chromatographic columns:HP-Cyano column and X-Bridge HILIC column,highly polar compound DMC and its impurities were all well separated by gradient elution using acetonitrile and water as mobile phase. With the two different chromatographic columns, four impurities in DMC were separated, such as dimethylaminoethyl methacrylate (DM),methacrylic acid (MAA), choline chloride (CC) and Hydroquinone monomethyl ether (MQ). This method has higher practical value, which can be used effectively in separated highly polar compounds.
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    Current and future trends of international standards for e-Education technology: ISO/IEC JTC1 SC36, its 24th plenary, WG meetings and open forum
    WU Yong-he, GUO Wei, ZHU Zhi-ting
    Journal of East China Normal University(Natural Sc    2011, 2011 (6): 139-151.  
    Abstract2221)      PDF (1069KB)(2649)      
    First, it makes a brief introduction about ISO/IEC JTC1 SC36 and its seven working groups (WGs), describes the current development of standards for e-Education technology, emphatically analyzes the relationship among the WGs; introduces the progress in the 24th SC36 Plenary and WG meetings; then it summarizes the concerns on thematic reports and proceedings of open forum, and anticipates the future development. Finally, integrating analysis of the whole meeting, it gives the forecast of international standards, emphatically analyzes the new relationship of the WGs.
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