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J* E* C* N* U* N* S* 2007 Vol.2007 Please wait a minute... For Selected: Download Citations EndNote Ris BibTeX Toggle Thumbnails Select Image and Simple Form of a Derivation on a Banach Algebra(Chinese) LIU Jun-Ping Journal of East China Normal University(Natural Sc    2007, 2007 (1): 1-6.   Abstract （2699）            Knowledge map    Save This paper proved Vukman's conjecture concerning the image of a linear derivation on a Banach algebra, gave some sufficient conditions that the image of a linear derivation on complex Banach algebra was in the Jacobson radical, and also discussed the simpleorm of a linear derivation on an annihilator Banach algebra. Related Articles | Metrics | Comments（0） Select Eigenvalue Problems for Second-order Dynamic Equations on Time Scales(English) GENG Feng-jie;ZHU De-ming Journal of East China Normal University(Natural Sc    2007, 2007 (1): 7-12.   Abstract （3069）            Knowledge map    Save The paper studied the eigenvalue problems for nonlinear second-order dynamic equations on time scales with m-point boundary conditions. Using Schauder's and Krasnoselskii's fixed point theorems, the eigenvalues were characterized and the existence of positive solutions established. Several kinds of intervals of λ were presented explicitly, in which the existence of at least one positive solution of BVP was guaranteed. Related Articles | Metrics | Comments（0） Select Oscillation Criteria for Certain Nonlinear Matrix Differential Equations with Damping(English) XU Yan-cong;MENG Fan-wei Journal of East China Normal University(Natural Sc    2007, 2007 (1): 19-26.   Abstract （3353）            Knowledge map    Save Using the method of integral average technique and defining a new prepared solution, this paper presented some new oscillation criteria of matrix differential equations with damping, which extend the results of Rogovchenko and Li for scalar cases and improve the results of Yang for matrix cases; a few examples was given at the end. Related Articles | Metrics | Comments（0） Select Periodicity of a Nonautonomous Ratio-Dependent Predator-Prey Systems with Impulses(English) ZHANG Wei-peng;ZHU De-ming Journal of East China Normal University(Natural Sc    2007, 2007 (1): 27-35.   Abstract （2897）            Knowledge map    Save This paper explored the existence of periodic solutions with strictly positive components and impulses of a nonautonomous ratio-dependent predator-prey system. Sufficient criteria were obtained for the existence of strictly positive periodic solutions. The approach was based on a continuation theorem in the coincidence degree theory as well as some prior estimates. Related Articles | Metrics | Comments（0） Select New Definitions of Partial Ordering of Generalized Inverse(Chinese) HUANG Xuan-chen;WEI Mu-sheng Journal of East China Normal University(Natural Sc    2007, 2007 (1): 36-41.   Abstract （3458）            Knowledge map    Save By using the concept of partial ordering of matrix, some new definitions of partial ordering were put forward, such as $\boldsymbol{A}\leqslant^{\{1\}}\boldsymbol{B}\Leftrightarrow \boldsymbol{A}\boldsymbol{A}\{1\}=\boldsymbol{B}\boldsymbol{A}\{1\},\boldsymbol{A}\{1\}\boldsymbol{A}=\boldsymbol{A}\{1\}\boldsymbol{B} $ and $\boldsymbol{A}\leqslant^{\{1,2\}}\boldsymbol{B}\Leftrightarrow \boldsymbol{A}\boldsymbol{A}\{1,2\}=\boldsymbol{B}\boldsymbol{A}\{1,2\},\boldsymbol{A}\{1,2\}\boldsymbol{A}=\boldsymbol{A}\{1,2\}\boldsymbol{B}$. Four situations were discussed in detail, according to which, sufficient and necessary conditions of the new partial ordering have been derived. Related Articles | Metrics | Comments（0） Select Global Robust Control for a Class of Singularly Perturbed Systems with Nonlinear Uncertainties(Chinese) WANG Ge-xia;CHEN Kun;WANG Zhi-ming Journal of East China Normal University(Natural Sc    2007, 2007 (1): 42-46.   Abstract （3004）            Knowledge map    Save The global robust stabilization problem for a class of nonlinear uncertain two-time scale systems was studied. The robust composite feedback control for the whole systems was obtained by applying the two-time scale design approach, and the upper stability bound of $\varepsilon $ was also given. Finally, examples of the application of the result were presented. Related Articles | Metrics | Comments（0） Select Stability Criterion for Nonlinear Time-Varying Discrete-time Systems(Chinese) YU Su-juan;WANG Zhi-ming Journal of East China Normal University(Natural Sc    2007, 2007 (1): 47-50.   Abstract （4024）            Knowledge map    Save The asymptotic stability of nonlinear time-varying discrete-time systems was studied by using Lyapunov approach. If there exists time independent Lyapunov function V that is positively definite, and its difference is non-increased along the solutions of the systems, plus the additional condition imposed as the one of statements of the Barbashin-Krasovskii theorem, the conclusion of asymptotic stability will be obtained. In applications of Theorem 1 to the time-invariant and periodic systems respectively, the LaSalle theorem and Barbashin-Krasovskii theorem can be reobtained. Related Articles | Metrics | Comments（0） Select Approximation Algorithm for the Total Tardiness Scheduling(Chinese) ZHANG Shu-xia;TANG Guo-chun Journal of East China Normal University(Natural Sc    2007, 2007 (1): 51-55.   Abstract （2795）            Knowledge map    Save For the total tardiness scheduling with precedence constraints, an approximation algorithm with polynomial complexity was presented by transplanting the backward-shift algorithm of the case without precedence constraints. The new algorithm can get an approximation solution for the scheduling quickly. Related Articles | Metrics | Comments（0） Select Choice Number of Some Complete Multi-partite Graphs(English) XU Yang; Journal of East China Normal University(Natural Sc    2007, 2007 (1): 56-61.   Abstract （2810）            Knowledge map    Save This paper investigated the choice number of some complete k-partite graphs, pointed out and corrected some mistakes of S. Gravier, H. Enomoto, et al.. The choice number of the complete k-partite graph K(4, 2, ..., 2) were determined, and also presented were a type of complete multi-partite graphs whose choice numbers are not equal to their chromatic numbers. Related Articles | Metrics | Comments（0） Select Number of 0-1 Triangles in Edge-Coloring of Complete Graphs(Chinese) ZHANG Yan;REN Han Journal of East China Normal University(Natural Sc    2007, 2007 (1): 62-64.   Abstract （3062）            Knowledge map    Save This paper studied the lower bound for the number of triangles having the same color in any 2-edge-colored complete graph, and found the exact number of such triangles by means of adjacency matrix. Related Articles | Metrics | Comments（0） Select Robustness of GLSE(Chinese) LIU Xiang-rong;WANG Jing-long Journal of East China Normal University(Natural Sc    2007, 2007 (1): 65-69.   Abstract （3711）            Knowledge map    Save Linear regression model with elliptically symmetric errors and unknown dispersion matrix was discussed. For a given matrix $ \Sigma}_{0}$, when the real dispersion matrix varying within certain range, the GLSE $\hat{\beta}({\vec \Sigma}_{0}) = (\X'{\vec \Sigma}_{0}^{-1}\X)^{-1}\X'{\vec \Sigma}_{0}^{-1}y$ is the minimum risk estimator under a large class of loss functions, which implies the GLSE is a robust estimator with respect to dispersion matrix and loss functions. Related Articles | Metrics | Comments（0） Select Upper Bound for Renewal Risk Model with Stochastic Investment Return(English) XU Lin;WANG Rong-ming;YAO Ding-jun Journal of East China Normal University(Natural Sc    2007, 2007 (1): 70-77.   Abstract （2947）            Knowledge map    Save Ruin problems in the ordinary renewal risk model with stochastic investment were examined. The asset price process of investment is denoted by $\{e^{R_t},\ t\geqslant 0\}$, where $R_t$ is assumed to be a L\'{e}vy process. By constructing a supermartingale associated with the ruin time of the surplus process with investment, an upper bound for ultimate ruin probability by martingale approach was presented. The impact of inter-arrival times of claims on ruin probability was considered by numerical method. Related Articles | Metrics | Comments（0） Select Online Expressions of Scientific Formula(Chinese) YE Chang-qing;WANG Zhen-xing Journal of East China Normal University(Natural Sc    2007, 2007 (1): 78-83.   Abstract （2940）            Knowledge map    Save This paper designed a WYSWYG online formula input system based on MathML, in order to transmit and present the scientific formula in plain text on the network. Related Articles | Metrics | Comments（0） Select Method on StructureBased Fingerprint Feature Extraction (Chinese) XU Yang;ZHANG Xuedong Journal of East China Normal University(Natural Sc    2007, 2007 (1): 84-90.   Abstract （3135）            Knowledge map    Save The algorithm of fingerprint feature extraction using Gabor filterbank was proposed in order to overcome the drawback of traditional minutiae feature extraction. Through studying texture structure information of fingerprint ridges and applying Gabor filterbank to texture, a physical model of Gabor filtering was established. A quick and simple method of center point searching was presented, according to center point's position round grid feature area was located, filtering by eight directions of Gabor filterbank and feature extraction. The result of comparison experiment showed validity of Gaborbased. Related Articles | Metrics | Comments（0） Select Simulation Model for the Order-Inventory-Sale Policy of a Kind of Merchandise(Chinese) DAI Shu-gui;JIANG Chang-hua;PAN Yin-rong;HU You-hua Journal of East China Normal University(Natural Sc    2007, 2007 (1): 91-99.   Abstract （3587）            Knowledge map    Save Merchandise with certain lifespan and orderdiscount was studied. Its characters in orderinventorysale were analyzed. Based on the simulation principle of the discrete events system, a system simulation model was created, and the simulation software was developed. The inventory system was analyzed with simulation experiments. The model and the software supply retailers with an efficient tool for establishing orderinventorysale policy. Related Articles | Metrics | Comments（0） Select Analysis and Improvement of SVDBased Image Watermarking Algorithm(Chinese) LI Bin;WANG Xin-wei Journal of East China Normal University(Natural Sc    2007, 2007 (1): 100-106.   Abstract （3495）            Knowledge map    Save This paper analyzed some existing image watermarking algorithms using singular value decomposition(SVD) technique, and pointed out they have the problem of high error detection rate of original image and randomly chosen images. With the analysis of SVD's properties a new algorithm was proposed. Experiments showed the new proposed algorithm can distinguish the watermarked image from unwatemarked original image.It can also significantly decrease error detection rate of randomly chosen images. This algorithm has good robustness. Related Articles | Metrics | Comments（0） Select Influence of Metallic Core Diameter on Giant Magnetoimpedance Effect for Fe-based Nanocrystalline Microwires (Chinese) ZHANG Jun-che;LIU Long-ping;ZHAO Zhen-jie;YANG Xie-long;WANG Qing-jiang Journal of East China Normal University(Natural Sc    2007, 2007 (1): 107-112.   Abstract （3291）            Knowledge map    Save Related Articles | Metrics | Comments（0） Select Mechanism of Interface Reaction and Magnetic Properties of Fe-TiN Prepared by High Energy Ball Milling (Chinese) ZHOU Xiong-tu;JIANG Dong-mei;MA Xue-ming;SHI Wang-zhou Journal of East China Normal University(Natural Sc    2007, 2007 (1): 113-118.   Abstract （3003）            Knowledge map    Save Mechanism of interface reaction and magnetic properties of Fe-TiN system attained by high energy ball milling were studied using Xray diffraction (XRD), Mssbauer spectroscopy and vibrating sample magnetometer(VSM). The results showed that during ball milling, a small amount of Fe atoms diffuse into the interface of TiN grains to form a paramagnetic interface phase TiN(Fe)and the diffusion of Fe atoms saturates with increasing milling time. Meanwhile, Ti and N atoms, as a result of the decomposition of fractional TiN, dissolve into the crystal lattices of Fe to form a ferromagnetic solid solution of Fe (Ti,N). The solid solution of Ti and N atoms make the saturation magnetization of powder samples rise first and then fall with the amount of Ti and N atoms increasing. Related Articles | Metrics | Comments（0） Select Separation of Various Components of Nonstationary Signal Using Half Fourier Transform (Chinese) YAO Hong-yu;LIU Yue-qian Journal of East China Normal University(Natural Sc    2007, 2007 (1): 119-126.   Abstract （2909）            Knowledge map    Save This paper used the Half Fourier Transform to analyze various components of a nonstationary signal. By MATLAB simulation, a practical example, remote sensing a finite cylinder, was tested to verify the proposed algorithm. The result showed that in the higher SNR, the proposed algorithm can perfectly meet our expectation: to separate impulse like components from damped exponentials. Related Articles | Metrics | Comments（0） Select Study on Giant MagnetoImpedance Effect in Ni80Fe20Composite Multilayers (Chinese) SONG Zi-cheng;YUAN Wang-zhi;ZHAO Zhen-jie;RUAN Jian-zhong;YANG Xie-long Journal of East China Normal University(Natural Sc    2007, 2007 (1): 127-134.   Abstract （3020）            Knowledge map    Save The(Ni80Fe20/SiO2)n/Cu/(SiO2/Ni80Fe20)n composite multilayers were deposited onto glass substrates using RF magnetron sputtering equipment. The giant magneto impedance (GMI) effect was been investigated. The results show that the GMI effect enhanced, when the (Ni80Fe20/SiO2) bilayers structure repeated in the sample. At n=3, the maximum LMI ratio is 10.81%，while the maximum TMI ratios is 17.08%. And when n increases to 4 and 5, the MI ratios decrease slightly compared with the ratios at n=3. By the Xray diffraction spectrums and the hysteresis loops, the change of the samples′ crystallization structure, magnetism characteristic and GMI effect were studied, which were induced by the number of bilayers. Related Articles | Metrics | Comments（0） Select Preparation of Rutile Titania Nanoparticles at Low Temperature (Chinese) DONG Rui;JIANG Ji-sen Journal of East China Normal University(Natural Sc    2007, 2007 (1): 135-140.   Abstract （3173）            Knowledge map    Save This paper reported a novel method to prepare rutile TiO2 nanoparticles. When TiCl4 solution hydrolyzed, rutile TiO2 nanoparticles can be prepared at low temperature by adding a kind of organic additive into TiCl4 solution. XRD, FE-SEM and TG-DTA were used to analyze the influence of the amount of organic additives and the calcining temperature on the phase and particle size of prepared nanoparticles. It was found that the best additive amount is 0.5 g/100 mL H2O, and the best calcining temperature is about 400 ℃. Being treated at the best condition, rutile TiO2 nanoparticles (40~50 nm) can be obtained. Related Articles | Metrics | Comments（0） Select Community structure and biodiversity characteristics of macrobenthos off coast of Lianyungang(Chinese) CHEN Bin-lin;FANG Tao;LI Dao-ji Journal of East China Normal University(Natural Sc    2007, 2007 (2): 1-10.   Abstract （3428）            Knowledge map    Save This article studied the community composition and biodiversity characteristics of macrobenthos under the intense environmental disturbances and analyzed the pollution status of sampling stations in three areas of Alkaline Factory, Port region and Nuclear Power Station off the coast of Lianyungang. The result shows that polychaete and mollusk are the dominant species which are 42.703%， 51.352%，56.03% and 46.085%，38.145%，32.034% of the total individual numbers, respectively in the three areas. The average value of Shannon-Wiener and evenness index in the region of Nuclear Power Station are the biggest which are 3.184 and 0.868, respectively, and the values in the Alkaline Factory are the smallest. The biggest average value of richness index is in the Port region which is 1.416, and the smallest value is in the Alkaline Factory. There is a approximate inverse relation between macrobenthos richness index and median grain siz Related Articles | Metrics | Comments（0） Select Calculation of the Taxonomic Diversity of Fish Communities in the Yangtze River Estuary(Chinese) ZHANG Heng;LU Jian-jian Journal of East China Normal University(Natural Sc    2007, 2007 (2): 11-22.   Abstract （3702）            Knowledge map    Save Based on the fish surveys using various sample nets in the Yangtze River Estuary, combined with previous studies, the fish master list in this area was updated and its hierarchical diversity was analyzed. The results show that there are 305 species of fishes, belong to 2 classes, 28 orders, 101 families and 215 genera, recorded in the Yangtze River Estuary. The cartilaginous fishes are composed of 5 orders, 12 families, 14 genera and 22 species, while bony fishes composed of 23 orders, 89 families, 201 genera and 283 species. The funnel plots with 95% confidence limits for both average taxonomic distinctness (Δ+) and variation in taxonomic distinctness (Λ+) of the Yangtze River Estuary fish master list were established. The value of Δ+ is 79.9, a little higher than those in Yellow Sea, Bohai Sea and East China Sea. Related Articles | Metrics | Comments（0） Select Pollen and Paloenvironment Analysis of Holocene in Shanghai Region(Chinese) JIA Li;YU Li-zhong;ZHANG Wei-guo Journal of East China Normal University(Natural Sc    2007, 2007 (2): 23-29.   Abstract （3079）            Knowledge map    Save Through the analysis and contrast between HM core and Dh core, combined with the data of AMS14C, six pollen assemblages were ploted out. At the mean time, six stages about the vegetation change and climate fluctuation were rebuild. In addition, there were three subassemblages ploted out in the Atlantic period, SubBoreal period and SubAtlantic period, which reflected the less vibration of the largescale climatic change. Pollen assemblage dominated by Concentricystes in the hard and green clay of late Pleistocene can make it sure that the hard green clay layer was formed by water. Related Articles | Metrics | Comments（0） Select Econometric Analysis of Paddy Production in Shanghai Suburbs(Chinese) YE Le-an;;WU Yong-xing;MAO Guo-fang Journal of East China Normal University(Natural Sc    2007, 2007 (2): 30-35.   Abstract （2770）            Knowledge map    Save Based on the Cobb-Douglas function, an econometric model for paddy′s production in the suburb of Shanghai was established. In the model, seeds, fertilizer, machine, irrigation and drainage, electric power (MIE), and labor were regarded as the production elements effecting paddy′s yield. The conclusion is that the most effective factor on paddy′s yield is MIE′s input, and the inputs of nutrition, seeds, and labors are followed in order. With the increase of planted scale of paddy, farmer′s benefit can be added up, but the increase of paddy′s yield and farmer′s income is not obvious. Related Articles | Metrics | Comments（0） Select Multi-scale Characteristics of the Urban Heat Island Intensity in Shanghai(Chinese) SUN Juan;SHU Jiong;YUE Qun;LU Xiao-qin Journal of East China Normal University(Natural Sc    2007, 2007 (2): 36-43.   Abstract （3367）            Knowledge map    Save The characteristics of the urban heat island (UHI) intensity in Shanghai were studied and calculated using wavelet transformation, based on per hour difference in temperatures in 2000 observed from Davis automatic stations installed at the Urban and Suburb of Shanghai. The results show that the period characteristics of UHI in Shanghai are asymmetric, which correspond with the period extending between wavelet amplitude centers and the strengthening of wavelet amplitude. Wavelet transformation can be used to analyze UHI synoptically. The UHI appears obvious on 14 hour-scale and 26 hour-scale in winter, while 12 hour-scale and 28 hour-scale in summer. The UHI in winter is stronger and more obvious than in summer. Related Articles | Metrics | Comments（0） Select Exploratory Spatial Data Analysis of the Regional Economic Disparities in China(Chinese) LU Feng;;XU Jian-hua Journal of East China Normal University(Natural Sc    2007, 2007 (2): 44-51.   Abstract （3515）            Knowledge map    Save The aim of this paper is an exploratory spatial data analysis of Chinese provincial per capita GDP over the sample period of 1978-2001. It revealed strong evidence of spatial autocorrelation as well as significant patterns of local spatial association. The detection of spatial clusters of high versus low per capita GDP distribution throughout the sample period is an indicator of the persistence of spatial disparities over the Chinese economic landscape. Local Moran autocorrelation statistics, Moran scatterplots and LISA were also computed and reveal the existence of “atypical regions”. Related Articles | Metrics | Comments（0） Select Preparation of Nanometer MgO by Sol-gel Auto-combustion(Chinese) FANG Hai-hong;HU Bing-yuan;WANG Lin-sheng;LU Rong-li;YANG Cui Journal of East China Normal University(Natural Sc    2007, 2007 (2): 52-57.   Abstract （3040）            Knowledge map    Save Nanometer MgO were prepared by sol-gel auto combustion techniques using magne-sium nitrate as raw material and citric acid as chelating agent. IR spectra of dried gels were examined to investigate the structural of precursors. By studying on the different TG curves of magnesium citrate gel, which prepared by different methods, we found that combustion process occurred and the nitrate ions acted as oxidant in combustion process. TEM photographs of synthesis powders by sol-gel auto-combustion showed that the crystallites were uniform. XRD curves of this sample showed that the particle sizes are 8.9 nm. The BET curves showed that the specific surface of the sample is 26.34 m2/g. And mechanism of foaming process in restraining agglomeration were discussed. Related Articles | Metrics | Comments（0） Select Preliminary Study on Polymorphism of Macronuclear and Mitochondria DNA in Resting Cell of Euplotes encysticus(Chinese) CHEN Ji-wu;ZENG Hong;GU Fu-kang Journal of East China Normal University(Natural Sc    2007, 2007 (2): 58-64.   Abstract （3163）            Knowledge map    Save The macronuclear and mitochondria DNA between the resting and the vegetative cell of Euplotes encysticus were comparatively analyzed by using RAPD technique in order to explore the acting feature of two genetic systems in the resting cell of ciliates. The results showed that 220 fragments were amplified in the resting and the vegetative cell DNA from Euplotes encysticus (EE) by using 35 random primers. In these fragments, both the resting and the vegetative cell macronucleus DNA had 18 and 44 specific fragments, respectively. The variance values was 28%. And 154 fragments were amplified in the resting and the vegetative cell mitochondria DNA from EE by using 32 random primers. Among them, both the resting and the vegetative cell mitochondria DNA had 19 and 25 specific fragments, respectively. The variance values was 29%. These data hinted that the structures of the macronuclear DNA in the resting and the vegetative cell of EE had some variances. The structure of both mitochondria DNA also had some variances. Therefore, in the process of EE forming resting cell, the structures of the macronuclear and mitochondria DNA all had perhaps some changes. These changes were closely related to the acute alteration for structural features and metabolism activities during the resting cell formation and related to physiological and biochemical alteration in the resting state. These results provided basic data for revealing relationship between differentiation of ciliates cell structure and acting of cell genetic substance. Related Articles | Metrics | Comments（0） Select Comparative Study on Ultrastructure of Eggshells in Four Species of Birds(Chinese) WANG Jia-yue;TANG Si-xian;WANG Jie;FU Li-ping Journal of East China Normal University(Natural Sc    2007, 2007 (2): 65-71.   Abstract （2801）            Knowledge map    Save Eggshell ultrastructures of Silver Pheasant (Lophura nycthemera),Common Quail (Coturnix coturnix),Pheasant-tailed Jacana (Hydrophasianus chirurgus) and Ashy Drongo (Dicrurus leucophaeus) were observed and researched by scanning electron microscope. The results indicated that the eggshell structures of four birds were much similar with other bird species, which were outer layer, spongy layer, cone layer, mammilla, shell membrane layer and pore channels through the shell from outer to inner. But obvious differences about the amounts and diameters of vesicular holes in spongy layer, the amounts of pores and mammillas of inner surface and the thickness of radial sections within the four birds were observed. From high to low, the arrangement of the amounts of vesicular holes in spongy layer was Common Quail, Silver Pheasant, Ashy Drongo and Pheasant-tailed Jacana； the arrangement of the diameters of vesicular holes in spongy layer was Silver Pheasant, Ashy Drongo Common Quail and Pheasant-tailed Jacana; the arrangement of the amounts of pores of inner surface was Silver Pheasant,Common Quail, Pheasant-tailed Jacana and Ashy Drongo; the arrangement of the mammillas of inner surface was Common Quail, Silver Pheasant,Pheasant-tailed Jacana and Ashy Drongo; the arrangement of the thickness of radial sections was Silver Pheasant,Common Quail, Pheasant-tailed Jacana and Ashy Drongo. The different structures are related with specific difference and living environment. And it is also the accustomization for environment. Related Articles | Metrics | Comments（0） Select Morphological Variation of Different ChineseGeographic Populations of White Shrimp (Exopalaemon modestus Heller)(English) CHEN Jie;GUO Hui;CHEN Li-qiao;WANG Xiao-yan;HAN Jie Journal of East China Normal University(Natural Sc    2007, 2007 (2): 72-80.   Abstract （2670）            Knowledge map    Save Morphological data of white shrimp (Exopalaemon modestus Heller) collected from five fresh water lakes in China were analyzed. Ten morphometric traits were measured from over 300 shrimps and the degree of morphological similarity among sites was calculated using multivariate analysis techniques. Eight from the eleven adjusted morphometric traits in females as well as six in males were effective to discriminate differences among five populations. Discriminant analysis revealed that over 90.8% females and 87.8% males of individuals could be classified to their sites of origin. The results of cluster analysis and principal component analysis revealed that populations from Taihu Lake and Dianchi Lake are most similar and form a common cluster when the other three populations from Xingkai Lake, Hulun Lake and Chaohu Lake form another branch, which means that the patterns of morphological variability in this species could be determined by the local environmental conditions，more research work must be done to identify the source of inter-population variability in the morphology of the white shrimp. Related Articles | Metrics | Comments（0） Select Influence of Cadmium and Lead to the Metallothionein in the Liver of the Quails (Coturnix coturnix japonica)(Chinese) WANG Jie;WANG Ming-shan;TANG Si-xian;ZHOU Zhong-liang Journal of East China Normal University(Natural Sc    2007, 2007 (2): 81-86.   Abstract （2795）            Knowledge map    Save The quails, Coturnix coturnix japonica, were fed with saline of CdCl2 or mixture of CdCl2 and PbCl2 orally, and were sacrificed after 16 days. The cadmium binding metallothionein was purified from the quail liver by the Sephedax G-75 permeation chromatography and centrifugal devices for concentration. After that the protein was tested by UV spectrophotometer and analysis of amino acid composition. The results demonstrate that the quail metallothionein contains 63 amino acid residuals, which has the general biochemical properties of mammal metallothionein: spectroscopic feathers typical of cadmium thiolate clusters, low molecular weight (6 614 Da), high metal (cadmium) content and the high level of cysteine content (about 31.82%). The cadmium-hemoglobin saturation assay was applied for quantification of metallothionein in the quail liver, the results showed that the synthesis of metallothionein in the quail liver can be induced by heavy metal cadmium and lead, and the amount of the liver metallothionein was increased with the heavy metal concentration exposed. The induction of metallothionein in the quail liver suggests that the heavy metal homeostasis mechanism in quails may have evolved similarly to mammals. Related Articles | Metrics | Comments（0） Select Studies on the Antioxidation Effects of Alpha-Lipoic Acid and Dihydrolipoic Acid(Chinese) LIAO De-feng;CHEN Ji-wu;XIE Ping;ZHU Zhen-qin;XU Rong Journal of East China Normal University(Natural Sc    2007, 2007 (2): 87-92.   Abstract （3904）            Knowledge map    Save Lipoic acid(LA) widely exists in all kinds of cells. It can be converted to dihydrolipoic acid (DHLA) in mammalian cell. The ability of alpha-LA and DHLA to scavenge reactive oxygen species and prevent DNA from oxidative damage by &#8226;OH was evaluated using chemiluminescence systems and colorimetric systems. The experiments show that LA and DHLA can directly scavenge &#8226;OH、H2O2、ONOO-and DPPH&#8226; ，effectively inhibit lipid peroxidation and DNA oxidative damage by &#8226;OH； DHLA can also effectively scavenge O&#8226;2-. These results indicate that both LA and DHLA are effective antioxidants and the anti-oxidative ability of DHLA is obviously stronger than that of LA. The present investigation can provide new free radical biological data for the further study on the medical and health-care applications of LA and DHLA. Related Articles | Metrics | Comments（0） Select Fermentation Medium Optimization of Transglutaminase by Response Surface Analysis(Chinese) CAO Dan-yue;GAO Hong-liang;CHANG Zhong-yi;HUANG Xiu-qin Journal of East China Normal University(Natural Sc    2007, 2007 (2): 93-97.   Abstract （2853）            Knowledge map    Save The optimal flask-shaking batch fermentation medium of microbial transglutaminase produced by Streptomyces sp. HS-1 was studied by Plackett-Burman design and Response Surface Analysis (RSA) with SAS (Statistical Analysis System). The results showed that the effects of soybean hydrolysate, glycerol and ammonium sulfate on the activity of microbial transglutaminase were significant among the eight factors by Plackett-Burman design and analysis. A polynomial regression model including the above three important factors was set up by RSA. The optimal concentrations of the three factors were assessed by the Canonical analysis. Estimated optimal conditions of the three factors were as the follows: soybean hydrolysate 24.0 g &#8226;L-1, glycerol 24.4 g &#8226; L-1 and ammonium sulfate 5.40 g &#8226; L-1. The enzyme activity was increased by 16.4%, from 6.27 μ &#8226; mL-1 to 7.30 μ &#8226; mL-1 using the optimal flask-shaking batch fermentation medium. Related Articles | Metrics | Comments（0） Select Luminescent Inhibition of Luminescent Bacteria by Ultra-Violets of Three Different Wave Lengths(Chinese) <SPAN lang=EN-US style= Journal of East China Normal University(Natural Sc    2007, 2007 (2): 98-103.   Abstract （3017）            Knowledge map    Save The influence of three kinds of Ultra-Violets (UVA, UVB and UVC) on two species of luminescent bacteria (V.qinghaiensis andV.fischeri) was studied. The results indicated that all three kinds of Ultra-Violets could inhibit the luminescence of the two species of luminescent bacteria. And with the increase of irradiation time, the inhibiting effects were enhanced without the changing of luminescent spectrum. UVC had the best inhibitory effect, UVB and UVA were in the next place. The experiments showed that even little irradiation（22 μW/cm2）would cause inhibition of luminescence in a few minutes. Furthermore, the MDA content produced by UV irradiation increased evidently. This phenomenon indicated that UV caused cellular membranes′ LPO which damaged the cellular membranes and inhibited the luminescence. Related Articles | Metrics | Comments（0） Select Primary Study of CREB4 Translocation Mechanism from Cytoplasm to Nucleus(Chinese) LIU Yong-qiang;NI Xiao-hua;ZHOU Dan;WANG Xin;GUO Wei-wei Journal of East China Normal University(Natural Sc    2007, 2007 (2): 104-110.   Abstract （3018）            Knowledge map    Save cAMP response element-binding(CREB) proteins are a family of mammalian transcription activators that mediate cAMP and calcium-dependent gene expression through the cAMP response element (CRE). CREB4 is a novel member of the human CREB family. Yeast two-hybrid system revealed that karyopherinα2 may associate with CREB4215-279aa. Subcellular location of CREB4 and CREB41-279aa showed that the GFP-CREB4 fusion protein was localized in cytoplasm, whereas the fusion protein of GFP-CREB41-279aa was translocated in nucleus. Our experiments further showed that CREB4 and karyopherinα2 were co-located in cytoplasm,but CREB41-279aa and karyopherinα2 were co-located in nucleus. These results suggested that first C-terminal was cleaved and then CREB4was carried into nucleus by karyopherinα2 to activate gene transcription. Related Articles | Metrics | Comments（0） Select Theories of Environmental Management for Water Source Protection in Plain River Network Region in East China(Chinese) CHE Yue;WU E-nuo;YANG Kai Journal of East China Normal University(Natural Sc    2007, 2007 (2): 111-121.   Abstract （3234）            Knowledge map    Save Revolved around two points (water source protection and local community development), both theoretical and practical aspects related to environmental management were discussed. The concepts concerning environmental management for water source protection in plain river network were defined and discussed. Complex System, Environmental Justice, Circle′s Protection, and Integrated Water Resources Management were applied to environmental management for water source protection in plain river network as main theories. The vulnerability of water source system and social-economic system, the equality of three areas (water source area, serving area and upper stream area), the circles of protection area and land use, and the integration of four dimensions (time, space, multidiscipline and stakeholder) were defined as the kernel of those theories. Water environment in Upper Huangpu River Watershed in Shanghai, as a study case, is influenced by regional social-economic factors, such as regional development and water quality of upper reaches, urbanization and population scale, local economic level and point pollution, land use and non-point pollution. The case study results show that the environmental management system composed of stakeholder involvement model, cooperative approach, and circle′s protection method is a new way to water source area protection in Upper Huangpu River Watershed. Related Articles | Metrics | Comments（0） Select (Chinese) Journal of East China Normal University(Natural Sc    2007, 2007 (2): 122-125.   Abstract （2344）            Knowledge map    Save Related Articles | Metrics | Comments（0） Select (Chinese) Journal of East China Normal University(Natural Sc    2007, 2007 (2): 126-128.   Abstract （2397）            Knowledge map    Save Related Articles | Metrics | Comments（0） Select (Chinese) Journal of East China Normal University(Natural Sc    2007, 2007 (2): 129-131.   Abstract （2259）            Knowledge map    Save Related Articles | Metrics | Comments（0）