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    Journal of East China Normal University(Natural Science) 2007 Vol.2007
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    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.  
    Abstract2657)           
    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.
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    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.  
    Abstract3033)           
    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.
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    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.  
    Abstract3315)           
    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.
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    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.  
    Abstract2840)           
    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.
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    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.  
    Abstract3406)           
    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.
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    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.  
    Abstract2982)           
    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.
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    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.  
    Abstract3943)           
    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.
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    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.  
    Abstract2760)           
    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.
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    Choice Number of Some Complete Multi-partite Graphs(English)
    XU Yang;
    Journal of East China Normal University(Natural Sc    2007, 2007 (1): 56-61.  
    Abstract2784)           
    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.
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    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.  
    Abstract2964)           
    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.
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    Robustness of GLSE(Chinese)
    LIU Xiang-rong;WANG Jing-long
    Journal of East China Normal University(Natural Sc    2007, 2007 (1): 65-69.  
    Abstract3641)           
    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.
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    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.  
    Abstract2904)           
    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.
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    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.  
    Abstract2906)           
    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.
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    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.  
    Abstract3082)           
    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.
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    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.  
    Abstract3535)           
    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.
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    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.  
    Abstract3444)           
    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.
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    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.  
    Abstract3257)           
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    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.  
    Abstract2969)           
    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.
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    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.  
    Abstract2873)           
    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.
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    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.  
    Abstract2978)           
    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.
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    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.  
    Abstract3041)           
    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.
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    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.  
    Abstract3369)           
    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
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    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.  
    Abstract3601)           
    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.
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    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.  
    Abstract3032)           
    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.
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    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.  
    Abstract2729)           
    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.
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    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.  
    Abstract3284)           
    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.
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    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.  
    Abstract3415)           
    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”.
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    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.  
    Abstract2990)           
    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.
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    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.  
    Abstract3113)           
    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.
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    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.  
    Abstract2733)           
    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.
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    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.  
    Abstract2625)           
    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.
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    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.  
    Abstract2750)           
    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.
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    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.  
    Abstract3728)           
    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 •OH was evaluated using chemiluminescence systems and colorimetric systems. The experiments show that LA and DHLA can directly scavenge •OH、H2O2、ONOO-and DPPH• ,effectively inhibit lipid peroxidation and DNA oxidative damage by •OH; DHLA can also effectively scavenge O•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.
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    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.  
    Abstract2809)           
    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 •L-1, glycerol 24.4 g • L-1 and ammonium sulfate 5.40 g • L-1. The enzyme activity was increased by 16.4%, from 6.27 μ • mL-1 to 7.30 μ • mL-1 using the optimal flask-shaking batch fermentation medium.
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    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.  
    Abstract2972)           
    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.
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    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.  
    Abstract2988)           
    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.
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    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.  
    Abstract3193)           
    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.
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    (Chinese)
    Journal of East China Normal University(Natural Sc    2007, 2007 (2): 122-125.  
    Abstract2319)           
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    (Chinese)
    Journal of East China Normal University(Natural Sc    2007, 2007 (2): 126-128.  
    Abstract2346)           
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    (Chinese)
    Journal of East China Normal University(Natural Sc    2007, 2007 (2): 129-131.  
    Abstract2231)           
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    (Chinese)
    Journal of East China Normal University(Natural Sc    2007, 2007 (2): 132-136.  
    Abstract2105)           
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    Study on the Pharmacological Effects of the Different Crude Extracts of Oldenlandia(Hedyotis)(Chinese)
    CONG Rong ;KUANG Lisha ;FENG Jing;HOU Aijun ;Bai Meirong;QIAN Min
    Journal of East China Normal University(Natural Sc    2007, 2007 (2): 137-140.  
    Abstract2675)           
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    Application of Boundary Layer Function Method in Differential Inequality(Chinese)
    NI Ming-kang;;LIN Wu-zhong;
    Journal of East China Normal University(Natural Sc    2007, 2007 (3): 1-10.  
    Abstract3431)      PDF (547KB)(527)      
    This paper discussed a kind of singularly perturbed ODE with boundary value. The upper and lower solutions defined in Nagumo Theorem by means of Vasil’eva’s boundary layer function method were contructed. Actually, it is of great universality and easy to use. After the construction, the existence of the solution of this singularly perturbed problem and estimation of the remainder terms with differential estimation of inequalities
    was proved.
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    Algebraic Perturbation Theory for Some Generalized Inverse(Chinese)
    SHENG Xing-ping;CHEN Guo-liang
    Journal of East China Normal University(Natural Sc    2007, 2007 (3): 11-15.  
    Abstract3012)      PDF (316KB)(492)      
    This paper introduced several properties of α-β generalized inverse, then used these properties to discuss the algebraic perturbation theory for the α-β generalized inverse in three kinds. The expression of the algebraic perturbation of α-β generalized inverse were presented.This paper introduced several properties of α-β generalized inverse, then used these properties to discuss the algebraic perturbation theory for the α-β generalized inverse in three kinds. The expression of the algebraic perturbation of α-β generalized inverse were presented.
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    Invariant Solutions of Gauss Equation on Jet Bundle R3(Chinese)
    HE Mei;
    Journal of East China Normal University(Natural Sc    2007, 2007 (3): 16-22.  
    Abstract3065)           
    Using symmetry group methods, this paper studied the invariant groups admitted by Gauss curvature equation on jet bundle R3. Invariant groups, infinitesimal generators of the corresponding invariant groups and some group-invariant solutions were found. Results about some surfaces which have constant Gauss curvature were given.
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    Nonlinear Stability of Three-Dimensional Quasi-Geostrophic Motions in Spherical Geometry(English)
    CAI Jing-jing;LIU Yong-ming;
    Journal of East China Normal University(Natural Sc    2007, 2007 (3): 23-30.  
    Abstract3544)           
    A nonlinear stability theorem was established for three-dimensional quasi-geostrophic motions in spherical geometry by establishing an optimal Poincaré inequality. The inequality was derived by variational principle.
    The result was shown better than the known results. Moreover, explicit upper bounds for the disturbance energy, the disturbance potential enstrophy, and the disturbance boundary energy on the rigid lids were also established.
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    Stability in Terms of Two Measures with Perturbing Lyapunov Functions(English)
    GENG Feng-jie
    Journal of East China Normal University(Natural Sc    2007, 2007 (3): 31-38.  
    Abstract2882)           
    This paper extended the method of perturbing cone-valued Lyapunov functions for a system of difference equations. Some properties of $(h_0,h)$-stability and $(h_0,h)$-asymptotical stability were discussed under much weaker assumptions.
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    Oscillations of Certain Second-Order Nonlinear Differential Equations with Impulses(English)
    ZHANG Wei-peng;BI Ping;ZHU De-ming
    Journal of East China Normal University(Natural Sc    2007, 2007 (3): 39-48.  
    Abstract3057)           
    This paper considered the oscillatory behavior of solutions of a second-order impulsive ordinary differential equation by using impulsive differential inequalities established by Lakshmikantham et al. Sufficient conditions were obtained for all solutions of this type of equations to be oscillatory, illustrating that impulses play an important role in giving rise to the oscillation of equations. In particular, our work generalizes some known results. Finally, an example was presented to explain the key role of impulses in
    generating oscillatory.
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    Strong and Weak Convergences of Implicit Iteration Process for Some Asymptotically Nonexpansive Mappings(English)
    QUAN Jing;ZHANG Shi-sheng;LONG Xian-jun
    Journal of East China Normal University(Natural Sc    2007, 2007 (3): 49-57.  
    Abstract3225)           

    The purpose of this paper was to prove some strong and weak convergence theorems of the modified implicit iteration sequence to a common fixed point for a finite family of asymptotically nonexpansive mappings in Banach spaces. The results presented here improve many recent works.

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    Custom Building Finite Tight Frames(Chinese)
    XIN You-ming
    Journal of East China Normal University(Natural Sc    2007, 2007 (3): 58-61.  
    Abstract3055)           
    Let {φm} m=1M be not all zeros vectors of CN. This paper introduced an algorithm to construct a tight finite frame by adding N-d1vectors to{φm} m=1M, where d1 is determined by {φm} m=1M.
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    Crossing Number of C(3m,m)(Chinese)
    LIN Shao-qin;XU Tu;REN Han
    Journal of East China Normal University(Natural Sc    2007, 2007 (3): 62-66.  
    Abstract3274)           
    Using surgical operations on graphs and induction method, this paper proved that the crossing number of the circular graph C(3m,m) is m.
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    Largest Spectral Radius among Graphs with k Cut Edge(Chinese)
    WU Ya-rong;HE Sha;SHU Jin-long
    Journal of East China Normal University(Natural Sc    2007, 2007 (3): 67-74.  
    Abstract3151)           
    This paper showed the types of graphs with the largest spectral radius and the second largest spectral radius among all the graphs with k cut edges respectively.
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    On the Spectral Radius of Trees with Fixed Maximal Degree(Chinese)
    XU Qin;LIN Qi;SHU Jin-long
    Journal of East China Normal University(Natural Sc    2007, 2007 (3): 75-81.  
    Abstract3646)           
    This paper discussed the spectral radius of trees with fixed number of vertices and fixed maximal degree,\ and gave the upper bound and lower bound of the spectral radius of those trees respectively. Furthermore, the minimal spectral radius were obtained at trees $T’_\Delta, T_\Delta $ and $T_\Delta^*$.
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    Predictive Control of Networked Systems with Data Packed(Chinese)
    LENG Cui-ping;ZHENG Yu-fan;ZHANG Xiao-mei
    Journal of East China Normal University(Natural Sc    2007, 2007 (3): 82-88.  
    Abstract3585)           
    A new protocol of network data transmission (i.e. input and output data are packed before transmission) was adopted. Under this protocol, the design of the predictive controller and stability analysis of the networked system were studied. It was proved that the design of the observer and the state feedback controller of the augmented system satisfied separation principle. The responding controller was given in terms of LMIs. A numerical example was provided to show the effectiveness of the method
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    Dircect Method for Solving Burgers Equation(Chinese)
    XI Yuan-xi
    Journal of East China Normal University(Natural Sc    2007, 2007 (3): 89-92.  
    Abstract3674)           
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    Intelligent Algorithm in Image Enhancement Technology (Chinese)
    SONG Juan;QUAN Hui-yun
    Journal of East China Normal University(Natural Sc    2007, 2007 (3): 93-99.  
    Abstract3521)           
    This paper proposed a novel cooperative evolutionary algorithm based on
    simulated annealing algorithm(SA)and particle swarm optimization(PSO). This new method utilizes the global convergence property of SA and the
    facility of realization of PSO, and attains an optimal solution by means of
    the information exchanges of these two kinds of algorithms. Results of
    experiments showed that the proposed algorithm performs better in
    convergence speed and precision of solutions than GA,PSO and SA.

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    Segmentation Algorithm Based on Subpixel Image (Chinese)
    HAN Wen-wen;WANG Ling;CHEN You-guang
    Journal of East China Normal University(Natural Sc    2007, 2007 (3): 100-106.  
    Abstract3223)           
    An algorithm was proposed to realize image segmentation with subpixel
    image based on Niblack and Otsu algorithms. Experimental results showed
    that the proposed algorithm can keep the characters′ topological structure,
    and yield smooth edge effectively. Compared with the original image
    segmentation, this proposed method is more efficient.
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    Infrared Electro Optical Property of Holographic Polymer Dispersed Liquid Crystal Grating (Chinese)
    XIN Zhao-hui;CAI Ji-guang;SHEN Guo-tu;YANG Bao-cheng;ZHENG Ji-hong;GU Ling-juan
    Journal of East China Normal University(Natural Sc    2007, 2007 (3): 107-113.  
    Abstract3140)           
    Experiments were performed to research the electrooptical characteristics of holographic polymer dispersed liquid crystal (HPDLC) at 1 550 nm. Results showed that the frequency and amplitude of the applied field impact the
    diffraction efficiency and transmission efficiency of HPDLC greatly. The theory
    of dielectric matters was used to explain the relationship between the
    applied field frequency and the dielectric constant and how it influences the
    effect of electrooptical modulation of the HPDLC. It was proved that the HPDLC devices are potentially useful for Erbium doped fiber amplifiers as a
    tunable gain equalizer.
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    Ab Initio Calculation of CN Free Radical Using MRD-CI (Chinese)
    YANG Ming;GUO Ying-chun;YANG Xiao-hua;CHEN Yang-qin
    Journal of East China Normal University(Natural Sc    2007, 2007 (3): 114-118.  
    Abstract3069)           
    Ab initio MRD-CI calculations were carried out for the low lying states of CN. The potential curves for the X2Σ+ ground state and A2Π+ excited state were determined. The bond lengths of the two states were found to be in good agreement with the experimental results. The spectroscopic constants of the two states were obtained by solving the Schodinger equation with the obtained potential energy. And the rotational constants′ first three digits are found significant after comparing with the experimental values.
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    Capacitive Deionization with Carbon Nanotubes Film Electrodes (Chinese)
    WANG Xin-zheng;PAN Li-kun;LI Mao-gang;CHEN Yi-wei;CHENG Rong-ming;HUANG Su-mei;SUN Zhuo
    Journal of East China Normal University(Natural Sc    2007, 2007 (3): 119-126.  
    Abstract3552)           
    Carbon nanotubes (CNTs) films electrodes were fabricated by low pressure
    and low temperature thermal chemical vapor deposition (CVD) for capacitive
    deionization (CDI) application. The CNTs films were mainly composed of
    mesopores (2~50 nm) and a small portion of macropores (>50 nm). The pore
    size distribution was optimal for CDI application. The CDI capacity was also
    dependent on working parameters: Higher ions removal is achieved with
    higher applied voltage and an optimal flow rate. The CDI capacity is
    dependent on ions properties: monovalent ions with smaller hydrated radii
    are preferentially removed from water.
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    Research on Electrical Composites: Multiwalled Carbon Nanotube/Sulfonated Polyphenylacetylene(Chinese)
    BIAN Cheng-xiang;XU Xue-cheng;YANG Guo-guang
    Journal of East China Normal University(Natural Sc    2007, 2007 (3): 127-134.  
    Abstract3563)           
    CompositesSulfonated Polyphenylacetylene/Multiwalled Carbon Nanotube(SPPA/MWNT)were prepared by mixing SPPA with MWNT under ultrasonic bath. The composites were studied using Fourprobe, X-Ray photoelectron Spectroscope, UV-Vis-NIR spectrophotometer, X-Ray diffraction, Field Emission Scanning Electron Microscope (FESEM) ,etc. The results show strong interactions between MWNT and SPPA as well as a behavior of
    Negative Temperature Coefficient (NTC) of resistance. The phenomenon of
    the low percolation threshold and twice obvious increases of electrical
    conductivity were also found in the composites. It is assumed that SPPA with
    higher electrical conductivity due to charge transfer between SPPA and MWNT,which were affected by interaction, contacts with each other. Thus it forms
    conductive networks in the composites.
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    Excellent Characteristics of ZnO Nanowires Synthesized by Two Step Method (Chinese)
    ZHANG Qiu-xiang;ZHANG Yong-sheng;BAI Wei;YU Ke;ZHU Zi-qiang
    Journal of East China Normal University(Natural Sc    2007, 2007 (3): 135-140.  
    Abstract2975)           
    ZnO nanowires with excellent properties were synthesized by twostep method. Photoluminescence (PL) measurements showed that the ZnO nanowires
    have stronger ultraviolet emission properties at 376 nm and there is a
    5 nm blue shift after being immersed in thiourea (TU) solution compared with those of without immersion. The immersed ZnO nanowires show a turnon field of 2.3 V/μm at a current density of 0.1 μA/cm2 and emission current density up to 1 mA/cm2 at an applied field of 6.8 V/μm, which are 2.7 V/μm and 7.9 V/μm for those of without being immersed, respectively.
    So this method may be an effective method to improve the characteristics
    of ZnO nanowires.
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    Application of Satellite Remote Sensing Data to the Calculation of Topography and Flooding at Littoral Zone(Chinese)
    ZHU Shou-xian;HUANG Wei-gen;DING Ping-xing;ZHANG Wen-jing
    Journal of East China Normal University(Natural Sc    2007, 2007 (4): 1-8.  
    Abstract3091)           
    A new method was presented using satellite remote sensing data in the calculation of topography and flooding at littoral zone. Flooding lines were drawn from high resolution satellite remote sensing images at different tidal level, and the topography of littoral zone was calculated with these lines. Then, the littoral zone topography was applied in the calcuation of flooding, which was checked with the satellite remote sensing images. Based on this method, the littoral zone flooding lines in Zhanjiang Harbor of China were analyzed by Landsat satellite remote sensing images, and the littoral topography and flooding were calculated.
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    3D Numerical Simulation of Storm Surge in the Changjiang Estuary and the Hangzhou Bay(Chinese)
    HUANG Hua;ZHU Jian-rong;WU Hui
    Journal of East China Normal University(Natural Sc    2007, 2007 (4): 9-19.  
    Abstract3697)           
    The study was based on the improved 3-D estuarine, coastal and oceanic model ECOM-si, in which a model of sea surface pressure and wind fields was embedded. By coupling the action of runoff, astronomic tide and storm surge, water level process in the Changjiang estuary and the Hangzhou Bay during three typhoons(No. 9711(Winnie), No. 0012(Prapiroon) and No. 0014(Saomai)) were simulated in this paper. The model revealed well the water level process during three typhoons. The simulated storm surges by Fujita pressure formula(formulaⅡ) were better fitting the observed than those by FujitaTakahashi pressure formula(formulaⅠ). The mean square errors between the simulated and the observed water level by formulaⅡduring three typhoons were 42.5 cm, 41.7 cm and 35.5 cm, respectively.
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    Design and Application of Integrated Visualized Storm Surge Forecasting System(Chinese)
    GE Jian-zhong;HU Ke-lin;DING Ping-xing
    Journal of East China Normal University(Natural Sc    2007, 2007 (4): 20-25.  
    Abstract3773)           

    The design of the system involved requirement analysis, functional and interface designs,combining the actual hydrological and meteorological data. Manmachine interaction interface was developed by using VB, FORTRAN, and MATLAB. The system has functions of numerical forecasting, data analysis and data storage. This integrated visualized system forecasted the water levels and setup of No.0509 Matsa Typhoon successfully by adjusting the model parameters according to the actual measurment of wind and water levels.

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    Study on Relation between Variation of Chlorophyll aConcentration and Sediment Grain Size on an Intertidal Flat(Chinese)
    LI Wan-hui;DING Ping-xing
    Journal of East China Normal University(Natural Sc    2007, 2007 (4): 26-33.  
    Abstract3748)           
    The chlorophyll a concentration and grain size in the sediment of an intertidal flat, as well as their relations were studied based on experiment data observed in the mudflat of Chongming Dongtan in Changjiang Estuary, where samples from three transects were taken during April, May, October and December in 2005. The results showed that there were remarkable seasonal variations of chlorophyll a concentrations and grain size at the surface of the mudflat, i.e., the chlorophyll a concentrations were higher in April [(5.997±0.803 ) μg·g-1] than in December [(0.571±0.091) μg·g-1], and the grain size had the similar trend of seasonal variations. The correlation between chlorophyll a concentrations and finegrained sediment content was significant at the 0.05 level ( r=0.693, P=0.012). Moreover, due to the light limitation, the chlorophyll a concentrations at the surface of the sediments were high, and rapidly decreased with the depth, and also were higher on the sediments surface in bare tidal flat than in Scripus mariqueter zone of the transition area.
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    Primary Discussion on Seabed Evolution ofNanhuizui and Qiqu Archipelago(Chinese)
    FU Gui;LI Jiu-fa;DAI Zhi-jun;WU Rong-rong;YU Zhi-ying
    Journal of East China Normal University(Natural Sc    2007, 2007 (4): 34-41.  
    Abstract3536)           
    Based on the hydrological and sediment survey datum in the spring of 2005 and the history sea charts, from the points of view on hydrodynamic condition, suspended sediment, sedimentary character, scouring and silting of the seabed, the evolution law of the seabed in the sea area of Nanhuizui and Qiqu Archipelago was analyzed. A trend of weaker silting and stronger scouring of this sea area in the recent 50 years was found, which is caused by the effect of ocean dynamics, the change of sediment flux to the sea and the constructions of some great coastal engineering projects.
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    Spectral Analysis and Remote Sensing Detection of Tidal Shoal′sVegetation in the Estuary of Yangtse River(Chinese)
    ZHANG Jie;SHEN Fang;LIU Zhi-guo
    Journal of East China Normal University(Natural Sc    2007, 2007 (4): 42-48.  
    Abstract3136)           
    This paper analyzed the spectrum character of preponderant vegetables and distilled wave band using the spectrum of the vegetation through field measure in the estuary of Yangtse River. Considering influence factors such as vegetation growth characteristic, season, vegetation cover in tidal shoal,vegetation index of combined characteristic wave bands was used to detect tide shoal's vegetation, in order that it could improve the vegetation classification precision and detect the changes of vegetation environment. The paper computed Vegetation Index of Ratio Vegetation Index(RVI), Normalized Difference Vegetation Index(NDVI), SoilAdjusted Vegetation Index(SAVI) and Modified SoilAdjusted Vegetation Index (MSAVI), and analyzed the advantages and disadvantages of the four vegetation indexes in different covers and seasons. Then used these indexes to detect the vegetation classification in TM image. In conclusion, combining the field measure and taking season factor into account for better classification. MSAVI wins the advantage of each vegetation index in classification.
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    Grain Size Distribution and Aeolian Feature of Loess on the Langgangshan Island in East China Sea(Chinese)
    LIU Fei;ZHENG Xiang-min;CAO Xi-qiang
    Journal of East China Normal University(Natural Sc    2007, 2007 (4): 49-55.  
    Abstract3533)           
    On the basis of systematic sampling and analysis of grainsize of loess on Langgangshan Island in East China Sea, features of component were discussed. The Aeoliandust deposition on Langgangshan Island mainly consists of fine particles(10~50 μm),which is similar to the component of loess in other sections of China but comparatively coarser. The average content of clay is 24.9% and coarse particles (>50 μm) on Langgangshan Island section is over 10%, which indicates that the materials of source contain proximal aeoliandust from shelf area of East China Sea in addition to distant aeoliandust from Northwest China.
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    Heavy Metals in Urban Dusts and Soils of Shanghai and Its Pollution Assessment(Chinese)
    MENG Fei;;LIU Min;HOU Li-jun;CHANG Jing;JIANG Hai-yan;WANG He-yi
    Journal of East China Normal University(Natural Sc    2007, 2007 (4): 56-63.  
    Abstract4583)           
    Through the investigation of 5 types of land use in Shanghai central city, including industrial, residential, traffic, greenbelt and commercial areas, heavy metals concentrations of 69 urban dusts, topsoils and 3 urban runoff samples were obtained. Compared with background concentrations, the heavy metal concentrations in urban dust and topsoils are much higher. The comprehensive pollution indexes in urban dusts and soils of the five land use types vary from 67.1 (residential area), 40.3 (green belt), and 22.9 (traffic area) to 12.5(industrial area), respectively. Both the dusts and soils are all polluted, especially due to the high concentration of Pb, Zn, and Cr. The urban runoffs EMCs (event mean concentration) of Cr, Pb and Zn in all land uses are high than Ⅴof the national standard. So the urban runoff will greatly influence the urban river water quality. Commonly, the heavy metal average contents of urban dusts are high in industrial, traffic and residential area and low in commercial area and green belts. When concerned the topsoils, however, the commercial area has the highest Cu content (75.2 mg●kg-1) and the lowest Pb content ( mg●kg-1), the traffic area has the highest Zn content (2 960 mg●kg-1); the residential area has the highest Pb (595 mg●kg-1) and Cr (627 mg●kg-1) contents. According to the EMCs in the urban runoff, the industrial area has the highest content of all 4 heavy metals and the EMCs of Cr, Pb, Zn, Cu in industrial are 6.9 mg●kg-1, 500 mg●kg-1, 3.9 mg●kg-1 and 2.3 mg●kg-1. The runoff around the industrial area, therefore, should be considered seriously. According to the EMCs in the urban runoff, the order of the rest land use types, from the highest to the lowest Pb, Cr and Zn concentration,is traffic area,residential area and commercial area.
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    Application of Argogeologic Environment Survey in the Development of Regional Agriculture:A Case Study in Shangyu City, Zhejiang Province (Chinese)
    CHEN Mei-jun;HU Xiao-meng;XIE Huai-sheng
    Journal of East China Normal University(Natural Sc    2007, 2007 (4): 64-70.  
    Abstract2972)           
    Taking the work of Argogeologic Environment Survey in Shangyu City as a case study, the paper analysed and evaluated the environmental quality of soil and surface water according to the field survey data. Based on the soil and surface water environmental quality evaluation, land safety and suitability evaluation, the status of land use,and the industry distribution feature in the region, the paper maked a suggestion on land function zoning. In this paper, argogeologic environment survey is used in the work of regional agriculture development, which provides scientific grounds for agricultural spatial arrangement.
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    Study on the Climate Changes Recorded in the Sediment of the Caohu Lake during the Last 300 Years(Chinese)
    FAN Bin;XU Shi-yuan;YU Li-zhong;JIANG Hui;ZHANG Wei-guo;DAI Xue-rong
    Journal of East China Normal University(Natural Sc    2007, 2007 (4): 71-76.  
    Abstract2950)           
    According to systematic research on the phytolith fossils in the sediment of core AC2 from the Caohu Lake, three phytoliths zones were divided. Based on changes in the main components in the phytolith zones and principal components analysis, the evolution of paleoenvironment and paleoclimate in the past 300 years was reconstructed. There are two warm periods(1770 s—1780 s;1890 s—1970 s ), one cold period(1780 s—1890 s)and one warming stage(1970 s—2003)in the last 300 years. The environment changes of each period in the Caohu lake area were further discussed, compared with the climate changes of the historical documents and instrumental data of Hefei and the mid-lower reaches of the Yangtze River.
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    Up-regulations of EphB4, EphA2, EphB3 and Ephrin-A5 in NSCLCs and Their Clinical Significances(English)
    YUN Yun;ZHANG Hong-feng
    Journal of East China Normal University(Natural Sc    2007, 2007 (4): 77-85.  
    Abstract3155)           
    To better understand the biological functions of Eph/ephrin genes in human lung carcinomas, mRNA expression levels of EphA2, EphB,EphB4,ephrin-A5 and ephrin-B2 were quantified in samples from 48 non-small-cell lung carcinomas (NSCLCs) in comparison with normal lung tissues by real-time PCR assay. The up-regulations of EphB4, EphB3 and ephrin-A5 in 27 of 48(60%), 39 of 48(81%) and 31 of 48(65%) lung cancers were found respectively. The results also showed that the expression of ephrin-A5 gene is associated with tumor histology, tumor size, metastasis, gender, smoking habits and age of the patients. There is a significant correlation between EphA2 expression and tumor size, tumor age and family history. All these results suggest that EphB4, EphA2, EphB3 and ephrin-A5 might function independently or synergistically in initiation and progression of primary lung cancer, and they might serve as valuable targets for therapeutic intervention.
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    Viability Rates of Eriocheir sinensis Sperms in SixPreservation Solutions (In Vitro)(Chinese)
    CHEN Dong-hua;ZHOU Zhong-liang;FAN Li-jun;QU Di;ZHAO Yun-long;WANG Qun
    Journal of East China Normal University(Natural Sc    2007, 2007 (4): 86-94.  
    Abstract3121)           
    To evaluate the preservation effects of different solutions, viability rate and density were assessed in of Eriocheir sinensis preserved in six solutions (In Vitro) at 4 ℃. Meanwhile viability rate of sperms was assessed by eosin stain. Those six preservation solutions were calcium-free artificial sea water I (Ca2+-FASW I), calcium-free artificial sea water II (Ca2+-FASW II), isostonie sodium chloride (NaCl) solution, aseptic physiological saline, isostonie potassium chloride (KCl) solution and isostonie glucose solution. Results showed that most of sperms preserved in KCl solution and glucose solution were thorough dead after 2 days. While sperms in Ca 2+-FASW I, II still keep alive.Especially in the Ca2+-FASW II, 92.19% sperms survived after 6 days′ preservation. Therefore, Ca2+-FASW II is an excellent solution to preserve Eriocheir sinensis sperms (In Vitro). Furthermore, Ca2+-FASW II was used to study its preservation effect with different sperms destiny, pH value and osmotic pressure. It indicated that no less than 95% sperms survived after 2 days′ preservation at 106~107 sperm/mL at 4 ℃. At least 90% survived after 15 days′ preservation at pH 7~10. More than 75% survived after 15 days′ preservation at 700~850 mOsmol/kg H2O among 10 scalar solutions at the different osmotic pressures (500~1 000 mOsmol/kg H2O) modulated by NaCl. It is concluded that with sperm density at 106~107 sperm/mL, osmotic pressure at 750~850 mOsmol/kg H2O and pH at 7~10, Eriocheir sinensis sperms are preserved in the optimum condition (In Vitro).
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    Study on DNA Damage Induced by HgCl2 and CdCl2 Using SCGE in Eriocheir Sinensis Sperms (In Vitro)(Chinese)
    FAN Li-jun;ZHOU Zhong-liang;CHEN Dong-hua;ZHAO Yun-long;SUN Ju-xiang;WANG Qun
    Journal of East China Normal University(Natural Sc    2007, 2007 (4): 95-100.  
    Abstract3527)           
    DNA damage induced by mercuric chloride (HgCl2) and cadmium chloride (CdCl2) in Eriocheir sinensis sperms (in vitro) was studied using single-cell gel electrophoresis (SCGE). Separated DNAs were dealt with six HgCl2 and CdCl2 scalar solutions (for each) (0 mmol/L, 0.01 mmol/L, 0.05 mmol/L, 0.1 mmol/L, 1 mmol/L, 5 mmol/L) for one hour at 37 ℃ (water bath) respectively. The length of cometic tail and damage rate of DNAs were betaken as SCGE indices. Results showed that DNAs in control group are free of damage, static in electric field and manifested as a round fluorophoreu without any cometic tails. While those dealt DNAs are damaged to various degrees and demonstrated as cometic fluorophoreu in electric field after Ethidium bromide (EB) stain. Furthermore, with the incremental concentration of HgCl2 and CdCl2, damage rate and migration distance also enlarge accordingly, that′s to say, dose-response relationship exist between SCGE indices and concentration of HgCl2 and CdCl2. Therefore, it is concluded that certain concentration of HgCl2 and CdCl2 does induce DNA damage in Eriocheir sinensis sperms (in vitro) and the damage degree is related to the concentration of HgCl2 and CdCl2, which have been attested using SCGE.
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    Influence of gp150 Protein on Cell Membrane Proteinsduring Dictyostelium Development(Chinese)
    HAN Yi;CHEN Ying-ying;HOU Lian-sheng
    Journal of East China Normal University(Natural Sc    2007, 2007 (4): 101-106.  
    Abstract3277)           
    To study the change of membrane proteins during Dictyostelium discoideum development, we used wild-type cells KAx-3 and mutant cells AK127. Membrane proteins was prepared by biochemical extraction by TritonX-114, separated using SDS-PAGE and scanned by BIO-PROFILE of VILBER LOURMAT. The results showed that 68 kD,60 kD,54 kD,50 kD,37 kD,34 kD and 31 kD are more stable during wild-type cells KAx-3 and mutant cells AK127 developments; they were not changed by AK127 cells devoid of gp150 proteins developments. The difference of protein content exist in 45 kD, 25 kD, 20 kD and 17 kD proteins, contents of those proteins being increased in the wild cells, and two new 10~12 kD proteins appeared in wild cells after 12 h development. This result indicates contents of those proteins expression are influenced by gp150 protein.
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    Cloning, Expression and Property of Protein Phosphatase 2C of Staphylococcus(Chinese)
    GUO Wei-wei;Ni Xiao-hua
    Journal of East China Normal University(Natural Sc    2007, 2007 (4): 107-111.  
    Abstract3088)           
    A novel dual specificity protein phosphatases named sPP2C (protein phosphatase 2C, Staphylococcus aureus) was cloned from Staphylococcus aureus gene library. sPP2C gene contained 741bp. The protein contained 247 amino acids and a protein phosphatases 2C catalytic domain. The molecular weight was 26.1 kDa, and pI was 4.95. sPP2C was expressed in Ecoli.Rossetta and purified by affinity chromatography. Enzyme property research revealed that sPP2C showed no phosphatase activity towards pNPP(p-nitrophenyl phosphate)which is a common synetic protein phosphatase substrate, whereas sPP2C showed phosphatase activity towards oligopetptides containing pSer/Thr and pTyr, indicating that sPP2C is a novel protein phosphatase with dual substrate specificity.
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    High Throughput Screening Method of Identifying Antagonist for Glucagaon Receptor in Chinese Herbs(Chinese)
    WAN Juan;XU Zhi-liang
    Journal of East China Normal University(Natural Sc    2007, 2007 (4): 112-118.  
    Abstract3155)           
    This paper generated a cell-based functional assay for human glucagon receptor antagonist screening. The human glucagon receptor cDNA was cloned into a mammalian expression vector pCDNA3.1 (h Glucagon receptor /pCDNA3.1). This plasmid was co-transfected with a reporter gene construct (3×CRE/3×MRE/SRE-LUC) in HEK293 cells. Stable cell line expressing both human glucagon receptor and the reporter gene was selected for compounds screening. The assay condition was optimized. Our results demonstrated that this cell-based assay can be optimized for high throughput screening and applied to identify antagonist for glucagon receptor in Chinese Herbs.
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    Effects of Lipoic Acid on Protecting in vitro CulturedBovine Aortic Cells from Oxidative Damage(Chinese)
    LIAO De-feng;CHEN Ji-wu;XIE Ping;ZHU Zhen-qin;XU Rong
    Journal of East China Normal University(Natural Sc    2007, 2007 (4): 119-123.  
    Abstract2852)           
    In order to reveal the potential function of lipoic acid (LA)in protecting cardiovascular system from oxidative damage,the effects of LA on cultured bovine aortic endothelial cells (EC) and smooth muscle cells (SMC) injured by H2O2 were investigated. The results showed that LA can dose-dependently promote the activities of superoxide dismutase (SOD) and decrease the level of malondialdehyde (MDA) in EC and SMC,indicating LA can effectively prevent EC and SMC from H2O2 induced oxidative damage. Our results can provide new free radical biological data for the further study on the medical and health-care use of LA.
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    Biodiversity of Macrobenthos in Upper Reaches of Huangpu River(Chinese)
    LIU Bao-xing;YOU Wen-hui;
    Journal of East China Normal University(Natural Sc    2007, 2007 (4): 124-131.  
    Abstract3288)           
    This paper investigated the macrobenthic biodiversity in Upper Reaches of Huangpu River from April 2005 to March 2006.The Shannon-Wiener index(H′), species eveness index(J) and richness index(D) were used to study the community structure, species assemblage, diversity of macrobenthos in Upper Reaches of Huangpu River. A total of 13 species were collected. Of these , the dominant species with high density were Limnodrilus hoffmeisteri , Bellamya aeruginosa and Corbicula fluminea, while the dominant species with high biomass were Corbicula fluminea and Bellamya aeruginosa. The Shannon-Wiener index(H′), species eveness index(J) and richness index(D) of Dianfeng were higher than those of Songpu Bridge. In seasonal variations, all of the three indices peaked in autumn, and were the lowest in summer, winter and spring respectively. According to the analysis of data, we found that the number of species and density have great effects on biodiversity; some environmental factors such as water temperature, water quality, habitat and human disturbance also affect biodiversity greatly.
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    (Chinese)Method for Calculating the Melting Temperature of Crystals at High Pressure
    ZOU Yong;CHEN Li-rong
    Journal of East China Normal University(Natural Sc    2007, 2007 (4): 132-136.  
    Abstract3067)           
    According to the Lindemann′s law and the approximate condition that the quantity αBT is a constant above the Debye temperature, this paper proposed a method to calculate the melting temperature of crystals at high pressure,and calculated the melting temperatures at different pressure for three crystals (LiF, NaCl and Al). The results show that the agreement between the melting curves calculated and the experimental data is good.
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    (Chinese)
    Journal of East China Normal University(Natural Sc    2007, 2007 (4): 137-140.  
    Abstract2550)           
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    Some Remarks on the Weighted Entropy(English)
    WANG Lin-feng;
    Journal of East China Normal University(Natural Sc    2007, 2007 (5): 1-11.  
    Abstract3365)      PDF (188KB)(362)      
    This paper gave the monotonicity of weighted entropy,
    studied the short time behavior of the weighted heat kernel, showed
    the entropy can be regarded as an isoperimetric constant,
    and used it to discuss some geometric properties of the manifold.
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    Criterion for Elliptic Curves with the Lowest 3-Power in L(1)(Chinese)
    SUN Nai-zhe
    Journal of East China Normal University(Natural Sc    2007, 2007 (5): 12-19.  
    Abstract3124)      PDF (265KB)(441)      
    Let K be the 3rd cyclotomic field, E D[lambda] :y2=x3-24 3 3 D[lambda]] be an elliptic curve defined over K, where D\in K is a square-free algebraic integer and [[lambda]] in Z . Qiu Derong found a rather complicated function as the criterion for the value of the Hecke L-function attached to the curve E D[lambda]([lambda]=2,4) at s=1 divided by the period [OMEGA] to be exactly divisible by 3 n/2 -1 . This paper reduced Qiu’s criterion to a simpler version in terms of weighted graphs.
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    Positive Solutions for an nth-Order Delay Differential Equation(English)
    LU Qiu-ying;ZHU De-ming
    Journal of East China Normal University(Natural Sc    2007, 2007 (5): 20-33.  
    Abstract3036)      PDF (218KB)(452)      
    This paper dealt with the existence of positive solutions
    for the nonlinear eigenvalue problem and the superlinear
    semipositone problem of an $n$th-order delay differential equation.
    The main results in this paper generalize some of the existing
    results in the literature. The proofs are based on the well-known
    Guo-Krasnoselskii fixed-point theorem.
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    Oscillation Theorems for Certain Second-Order Nonlinear Matrix Differential Equations(English)
    XU Yan-cong;MENG Fan-wei
    Journal of East China Normal University(Natural Sc    2007, 2007 (5): 34-38.  
    Abstract3594)      PDF (174KB)(407)      
    Some new oscillation criteria were established for the
    second order nonlinear matrix differential system $
    (a(t)\X’(t))’+b(t)\X’(t)+\Q(t)f(\X(t))= 0,t\geqslant t_ 0 >0,$
    where $\Q(t),$ $f’(\X(t))$ are $n \times n$ matrices with
    $f’(\X(t))$ positive definite, and $a(t),$ $b(t)$ are real-valued
    functions. The criteria were presented in the form of $\lim
    \sup\lambda_ 1 > const $ by using a particular function
    $\phi(t,s,r)$ defined as $\phi(t,s,r)=(t-s)^ \alpha (s-r)^ \beta $,
    where $\alpha,\ \beta > \frac 1 2 $ are constants and $r
    \geqslant t_0.$ Our results improve many known oscillation
    results.
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    onditionally Stable Dirichlet Problem for Nonlinear Singulary Perturbed Systems(Chinese)
    WANG Ai-feng;WANG Xun-yang;NI Ming-kang
    Journal of East China Normal University(Natural Sc    2007, 2007 (5): 39-46.  
    Abstract3015)      PDF (306KB)(348)      
    Using the boundary function method, this paper studied a conditionally stable Dirichlet problem for
    a kind of nonlinear perturbed systems.The asymptotic solution of the problem was given and proved to be uniformly effective. And the existence
    and uniqueness of the solution for the systems were proved.
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    Parallel Computation of the Moore-Penrose Inverse of a Bidiagonal Matrix(English)
    FANG Mao-zhong
    Journal of East China Normal University(Natural Sc    2007, 2007 (5): 47-53.  
    Abstract3068)      PDF (165KB)(362)      
    This paper dealt with parallel computation of the Moore-Penrose inverse of a bidiagonal matrix. A divide
    and conquer algorithm was given. A numerical example and a
    theorem about parallel efficiency were presented.
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    3×3 Matrix Spectral Problem and Its Darboux Transformation(Chinese)
    ZHOU Zhen-chuan;ZHOU Zhen-jiang;
    Journal of East China Normal University(Natural Sc    2007, 2007 (5): 54-61.  
    Abstract2945)      PDF (316KB)(388)      
    The Lax pair of a 3×3 matrix spectral problem was
    constructed and the hierarchy corresponding to this Lax pair was
    also obtained. This hierarchy includes not only KdV and mKdV
    equations but also high-order NLS equation. Besides, with the help
    of the gauge transformation of spectral problem, the Darboux
    transformation of this $3\times3$ matrix spectral problem was
    deduced and its explicit solutions were given.
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    Image Restoration Combining the Total Variation Minimization and a SecondOrder Functional(English)
    LI Fang
    Journal of East China Normal University(Natural Sc    2007, 2007 (5): 62-69.  
    Abstract3047)      PDF (772KB)(504)      
    A new variational model for noise removal was proposed. It combines the total variational (TV) functional with a second order functional,and the corresponding negative gradient flow is a fourth order PDE.The proposed model combines the benefits of the total variation model and the secondorder model,being able to preserve edges while at the same time avoid the staircase effect in smooth regions. Experimental results illustracted advantages of the proposed model.
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    Intrinsic Image Segmentation on a Riemannian Manifold(Chinese)
    FAN Jin-song;PI Ling;LI Fang;SHEN Chao-min
    Journal of East China Normal University(Natural Sc    2007, 2007 (5): 70-77.  
    Abstract3504)      PDF (654KB)(362)      
    An image segmentation model based on the view of
    Riemannian Geometry was proposed. Endowed with a Riemannian metric
    derived from the gray scale information of a given image, the image
    space became a Riemannian manifold. On this Riemannian manifold, we
    evolved a curve by the mean curvature flow using the level set
    methods. Because the gray scale information had been embedded into
    the Riemannian manifold, the evolution was intrinsic. Calculations
    show that the method is an extension of existing models;
    furthermore, finer controls for the evolution can be achieved.
    Numerical experiments show the effectivity and some good features of
    the proposed method.
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    Second and Third Largest Spectral Radii of 2-Trees with n Vertices(English)
    YU Hai-xin;;YUAN Jin-song;HONG Yuan;Shu Jin-long
    Journal of East China Normal University(Natural Sc    2007, 2007 (5): 78-84.  
    Abstract3275)      PDF (526KB)(529)      
    By using the concept of Perron vector, this paper
    characterized the extremal graphs of all 2-trees with $n$ vertices
    ($n$ fixed) which have the second and the third largest spectral
    radius, respectively. Particularly, for $n=6$, five 2-trees with 6
    vertices were found whose spectral radii are strictly descent.
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    On the 3-Colorable Planar Graph(Chinese)
    ZHANG Xue-yuan;CHEN Cang;MIAO Lian-ying
    Journal of East China Normal University(Natural Sc    2007, 2007 (5): 85-88.  
    Abstract3572)      PDF (185KB)(589)      
    By using the discharging method, it was proved that every
    planar graph is 3-colorable, provided that it has not any 4-,
    5-cycles, and the distance between any two triangles is at least 2.
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    Newly Designed Option and Its Application in Risk Management(Chinese)
    XIA Xiao-hui;ZHOU Bin
    Journal of East China Normal University(Natural Sc    2007, 2007 (5): 89-91.  
    Abstract2726)      PDF (146KB)(511)      
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    Selection of Top Quality Portfolio under H-Value Rule(Chinese)
    LIANG Yi-kong;CHAI Jun
    Journal of East China Normal University(Natural Sc    2007, 2007 (5): 92-97.  
    Abstract2707)      PDF (265KB)(462)      
    This paper studied how to select several top quality stocks from thousands of stocks in the security market to get a better portfolio.Firstly,H-value rule which can evaluate quality of portfolio was given under the condition of permitting shortsailing for the first time. Then,how to select the better portfolio under H-value rule was studied.Secondly,A simplified theorem of H-value was introduced under the market index model. It showed the efficiency of the selection.

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    Decentralized Adaptive Control for Uncertain Large-Scale Systems with Time-Varying Delays in the Interconnections(English)
    XU Jian-qiang;;CHEN Shu-zhong
    Journal of East China Normal University(Natural Sc    2007, 2007 (5): 98-106.  
    Abstract3058)      PDF (254KB)(407)      
    The problem of decentralized adaptive control was
    considered for a class of uncertain large-scale time-varying delays
    systems in the presence of mismatched and matched uncertainties. The
    interconnections were assumed to satisfy the match condition and be
    bounded by a linear function of delayed states with unknown gains.
    The upper bounds of the matching uncertainties and perturbations
    were also assumed to be unknown. The adaptation laws were proposed
    to estimate such unknown bounds, and by making use of the LMI
    method, a class of decentralized robust adaptive controllers was
    constructed. Based on the Lyapunov stability theory and
    Lyapunov-Krasovskii functional, it was shown that the state
    trajectories of the large-scale systems were uniformly
    asymptotically to zero. Finally, a numerical example was given to
    demonstrate the validity of the results.
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    Domain OntologyBased Document Automatic Summarization(Chinese)
    WANG Qi;JIANG Kai-zhong;YANG Jing;GU Jun-zhong
    Journal of East China Normal University(Natural Sc    2007, 2007 (5): 107-112.  
    Abstract3564)      PDF (417KB)(1529)      
    A new arithmetic based on Latent Semantic Analysis Model and domain ontology was proposed to summarize the document. Based on the traditional statistic arithmetic,recognition of document theme and computation of concept similarity were imposed by using domain ontology,which described the main content of documents better. In the guide of document theme and concept similarity, statistical approaches and heuristic rules to extract keysentences were used, which are proved to improve the quality of automatic summarization arithmetic by experiment.

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    NLMSBased AEDA Algorithm for Sound Source Localization(Chinese)
    LU Jing-yan;ZHU Shou-zheng
    Journal of East China Normal University(Natural Sc    2007, 2007 (5): 113-117.  
    Abstract3125)      PDF (390KB)(306)      
    To speed conventional Adaptive Eigenvalue Deposition Algorithm (AEDA), an NLMSbased optimized AEDA algorithm was proposed.It gives better performance for convergence,which makes it possible for realtime applications.Experimental results showed that this method can work well in sound source localization.

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    Dynamic Characterization of an Innovative RF MEMS Switch(Chinese)
    ZHANG Yong-hua;LIU Lei;DING Gui-fu; CAI Bing-chu;LAI Zong-sheng
    Journal of East China Normal University(Natural Sc    2007, 2007 (5): 118-122.  
    Abstract2961)      PDF (333KB)(456)      
    Due to the use of permanent magnet in structure,a bistable electromagnetic radio frequency microelectromechanical systems (RF MEMS) switch based on UVLIGA technology requires no energy to remain at “on” or “off” state. And the electromagnetic actuation with low power consumption can be achieved.The dynamic characterization of the switch was successfully measured using DMEMS dynamic measurement system attached to wyko NT1 100 optical profiling system supplied by Veeco instruments Co.,Ltd.The results of test showed that the bistable electromagnetic actuation is achieved, and the switching time is less than 20 μs.
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    Enhancement of Giant MagnetoImpedance Effect Using LC Resonance(Chinese)
    WU Zhiming;ZHAO Zhen-jie;LIU Long-ping;YANG Xie-long
    Journal of East China Normal University(Natural Sc    2007, 2007 (5): 123-127.  
    Abstract3349)      PDF (239KB)(446)      
    In this study, resonance enhancement of Giant MagnetoImpedance effect in Febased glasscoated microwires was investigated. A new method was adopted by sputtering a copper layer in the outside of the Febased glasscoated wires. A capacitance was formed between the ferromagnetic core and outer copper layer, where the glass insulator works as dielectric layer. Therefore, the composite wire constructs a LC resonance circuit by itself, resulting in an increase of GMI ratio from 250% to 330%. Meanwhile, the influence of resonance frequency on the GMI effect was discussed.
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    Scalar Field Perturbation and PhaseTransition of Black Holes (English)
    LU Ji-zong;JIANG Yuan-fang
    Journal of East China Normal University(Natural Sc    2007, 2007 (5): 128-133.  
    Abstract2992)      PDF (236KB)(415)      
    In this paper, the scalar field perturbations in the background of the massless BTZ black holes was discussed. We found that the massless BTZ hole contains only normal modes in the perturbations. This is different from the perturbation results in the generic nonrotating BTZ black hole background. This special property reflects that the massless BTZ black hole is a different phase from that of the generic nonrotating BTZ hole.

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    Preparation and Surface Study of Titanium Dioxide Films with Different Crystalline Structures (Chinese)
    HU Shi-qiong;WANG Xiang-hui;LIU En-qing;SHI Qin;YU Wen-juan
    Journal of East China Normal University(Natural Sc    2007, 2007 (5): 134-140.  
    Abstract3080)      PDF (404KB)(376)      
    Titanium dioxide (TiO2) films with different crystalline structures were prepared via solgel dip coating method. The influences of humidity, substrate and catalyst acid on the film quality such as integrality and crystallization were investigated. Pure anatasetyped and rutiletyped TiO2 films with homogeneous and compact nanostructure were prepared under the optimized conditions. The surface characters of both types of TiO2 films were studied by surface energy test and infrared spectrum analysis. The results showed that bothtyped films are able to capture OH radicle, but anatasetyped TiO2 film shows a stronger capability, which leads to a higher surface energy and better hydrophilicity.
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    Neural Mechanism of Binaural Auditory Information Integration in the Brain(Chinese)
    ZHANG Ji-ping;SUN Xin-de
    Journal of East China Normal University(Natural Sc    2007, 2007 (6): 1-11,3.  
    Abstract3130)      PDF (1328KB)(483)      
    In natural environments,human and animals percept auditory signal or sound environment by analyzing and integrating binaural sound information through the auditory system and then make their decisions. The present paper reviewed the research progress regarding the neural mechanism of binaural information integration in the brain within the last 60 years. The anatomical basis of binaural information processing,the classification and response properties of binaural neurons,and the topographic distribution of binaural neurons in the central auditory system were reviewed. Research progress and several models regarding the mechanism of binaural information processing,including the neural coding for binaural time difference and binaural level difference in the superior olive complex,inferior colliculus and auditory cortex were discussed.Future study directions on the binaural processing mechanism were also suggested.
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    Research on Nitrogen Nonpoint Source Pollution Model in Farmland of Shanghai Suburbs(Chinese)
    ZHENG Jian-yu;ZHOU Nai-sheng
    Journal of East China Normal University(Natural Sc    2007, 2007 (6): 12-19.  
    Abstract3452)      PDF (660KB)(310)      

    According to the characters of runoff and fertilization, the runoff process in the farmland was divided into paddy field fertilization period, paddy field growth period and dry land period. Based on the fieldwork in Shanghai area, the regress model of nonpoint source pollution in these three types of farming period were developed. There is difference between the simulated and actual precipitations situations. Nitrogen concentration during the simulated precipitations varied between 28 mg&#8226;L-1 and 45 mg&#8226;L-1, with the precipitation density at 2 mm&#8226;min-1, and the nitrogen concentration during the actual precipitation varied between 0.2 mg&#8226;L-1 and 4.0 mg&#8226;L-1, with the precipitation density varing between 0.037 6 mm&#8226;min-1 and 0.075 1 mm&#8226;min-1. Based on the long-term precipitation data and nitrogen loss in the groundwater, by the modified SCS method the annual nitrogen load in the farmland was calculated, and the value is 26.5 kg&#8226;ha-1.

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    Study on Regulation of Land Use Sustainability in Shanghai Based on Ecological Footprint Model(Chinese)
    DAI Xiao-yan;XU Jian-hua;DONG Shan;MA Jun-jie;WANG Zhi-hai
    Journal of East China Normal University(Natural Sc    2007, 2007 (6): 20-28.  
    Abstract3097)      PDF (918KB)(397)      
    The ecological footprint model was applied to analyze the variation of ecological footprint in Shanghai from 1996 to 2005. Based on these, the ecological footprint and land scale were predicted in 2010 and 2020 through the grey forecast model, and land use regulation indeces and optimal arrangement favorable to ecological environment in Shanghai were obtained. These results are helpful to establish general land use planning scientifically in order to implement the regulation of land use sustainability, and to promote the development of economy, population, resource, environment and land use in a harmonious way.
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    Design and Implement of the Management Information System of Retail Stores Based on GIS for Shanghai City(Chinese)
    WANG Yuan-fei;LIU Li-ming;YANG Qin-zhi;PU Zu-jian
    Journal of East China Normal University(Natural Sc    2007, 2007 (6): 29-36.  
    Abstract3679)      PDF (740KB)(371)      
    This paper showed an implemented project of Shanghai Management Information System for Retail Stores based on GIS .In the process of the system development,several key technologies were issued and solved,such as retail store data model, retail store geocoding,readable user interface and commercial maps.Various functions,including data management,updating and maintenance,query and statistics,analysis and commercial mapping,were programmed.All these offered information tools for management and planning of urban retail stores.
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    Comparison of Two Analysis Methods of Fugitive Road Dust Size in Shanghai City(Chinese)
    HUANG Yan-min;SHU Jiong;GU Ying
    Journal of East China Normal University(Natural Sc    2007, 2007 (6): 37-43.  
    Abstract3214)      PDF (430KB)(453)      
    This paper reported the comparison analysis between laser method and aerodynamic particle sizer spectrometer method of particle size measurement for dust samples of 54 roads form Shanghai city center.Regression relations were established between the results by two methods.The difference of results was explained by their testing principles,which imply more informations for further work.
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    Experimental Study on Physical Controls of an Exotic Plant Spartina alterniflora in Shanghai(Chinese)
    LI He-peng;ZHANG Li-quan
    Journal of East China Normal University(Natural Sc    2007, 2007 (6): 44-55.  
    Abstract3284)      PDF (1167KB)(620)      

    Since introduced into the Chongming Dongtan Nature Reserve in 1995,Spartina alterniflora has rapidly expanded and seriously threatened the biodiversity there.During 2005 and 2006, a field experiment of physical controls, including digging tillage, breaking rhizome, cutting, and biological substitute,on S.alterniflora was conducted to search effective measures for controlling this invasive plant.The growth parameters of density, coverage and aboveground biomass were used to evaluate the efficiency of different treatments.The results showed that for the digging tillage treatments, the density, coverage and aboveground biomass were significantly lower than that of the control and there were no significant difference among the different depth treatments.In the end of the second growing season, there were no significant differences among the treatments and the control.The treatments of breaking rhizome significantly inhibited the growth of S.alterniflora in the first growing season and inhibition increased with the depth of treatments.However, the inhibition of growth disappeared after two growing seasons and there were no significant differences among the treatments and the control.The treatments of cutting significantly inhibited the growth of S.alterniflora in the first growing season.In the end of the second growing season, the growth of S.alterniflora recovered in some extent, only the treatments of JUN, JUL, AUG and SEP significantly inhibited its growth.In the biological substitute treatment, the transplanted Phragmites australis kept a relatively high survival in the first growing season.The survival rate maintained at the level of 54.2% and both the plant height and fruiting increased considerably in the second growing season.The results demonstrated that it is necessary to take into account of frequency, intensity and season of these measures to achieve a high efficiency for controlling the invasion of S.alterniflora.

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    Structural Reexamination and Ab-initio Calculation on the Silver(I) Perchlorate-Benzene Complex(Chinese)
    MA Hui;DONG Ling-ling;LIU Ying;WU Liang-ping
    Journal of East China Normal University(Natural Sc    2007, 2007 (6): 56-61,8.  
    Abstract3054)      PDF (549KB)(405)      
    The silver(I) perchlorate-benzene complex,AgClO4&#8226;C6H6,was synthesized and structurally reexamined by X-ray crystallography at low temperature.The compound crystallized in the orthorhombic space group Cmcm(#63), with unit cell dimensions of a=8.154 0(6)×10-10 m, b=7.918(4)×10-10 m, c=11.717(1)×10-10 m,V=756.4(4)×10-30 m3,Z=4.The study revealed details of the structure not observed by previous authors in respect of the distortions of the benzene molecule and the coordination environment of the metal ion.The data are consistent with the results obtained from ab-initio calculation of the complex.
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    Determination of Chemical Oxygen Demand Values by Photocatalytic Oxidation Using Nano ZnO Film on Quartz(Chinese)
    LU Hua;QU Yun-he;ZHOU Tian-shu;ZHENG Lei;SHI Guo-yue
    Journal of East China Normal University(Natural Sc    2007, 2007 (6): 62-68,9.  
    Abstract2965)      PDF (618KB)(330)      
    A COD measurement by photocatalytic oxidation using nano ZnO film was investigated.K2Cr2O7 was added into the solution to enhance the efficiency of photocatalytic degradation,and simultaneously K2Cr2O7 was reduced to Cr(Ⅲ) by photogenerated electrons which were adsorbed on the surface of ZnO.The measuring principle was based on direct determination of Cr(Ⅲ) concentration which was proportional to the COD value.Under the optimized experiment condition,the application range was 50~1 000 mg/L,and the detection limit was 20 mg/L.The immobilization of photocatalyst on the supports could not only solve the problem of low recovery of the catalyst and hard separation from the solution,but also overcome its shortcoming of poor stability.Applying this method to the determination of real samples,it was found to be rapid and environmentally friendly.Additionally,the method proposed above for determination of COD was in excellent correspondence with values obtained by using the conventional method.
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    Characteristics of Radial Oxygen Loss from Root of Wetland Plants(Chinese)
    DENG Hong;YE Zhi-hong;HUANG Ming-hong
    Journal of East China Normal University(Natural Sc    2007, 2007 (6): 69-76.  
    Abstract4183)      PDF (744KB)(530)      
    Characteristics of radial oxygen loss (ROL) from root of 10 wetland plants was studied in this paper.Root ROL varied with the distance from root tips,as well as with species.Spatial pattern of ROL was identified to show 3 types according to the trends of ROL rate along adventitious roots.Type Ⅰ showed a relatively high rate of ROL along the whole root,declining gradually from root apex to root basal part.Type Ⅱ was indicated by significantly high ROL in root apex but decreased greatly towards root base.As for Type Ⅲ,ROL was similar but very low along the whole root.In nutrient solutions,deoxygenation caused a series of changes in root ana-tomy of some species,such as increased root diameter,root porosity and more developed aerenchyma,inducing a ROL barrier in root basal part and the consequent change of ROL profile.
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    Dynamic and Driving Forces of Landscape Pattern of Estuarine Wetland in the Min River(Chinese)
    ZHOU Liang-jin;YOU Wen-hui
    Journal of East China Normal University(Natural Sc    2007, 2007 (6): 77-87.  
    Abstract3231)      PDF (994KB)(426)      
    Along the Min River, there are more than five areas with relatively large area and well habitant and breeding for birds.Human-induced land use and land cover changes in wetland areas,such as urban construction and flood-proof and transportation projects conversing wetlands into non-wetlands, has significant impacts on landscape pattern of wetlands.This paper applied multiple spatial data and information from remote sensing and maps, as well as geographic information system modeling and landscape ecological approaches to reveal the changes of landscape of wetland in the study area from 1986 to 2003.The results showed: (1) The regional wetland landscape types were characterized into 12 types,including natural wetland, man-made wetland and non-wetland.The landscape diversity index and Shannon’s Evenness index increased in the past 17 years, while the numbers of patches increased, the areas of the nature wetland decreased and that of man-made wetland and non-wetland increased.The fragmentation of landscape of wetland in the study area enhanced steadily due to increasing mankind activities.(2) On respect of individual patches index, wetlands’ patches mean area declined 28.99 percents from 1986 to 2003 and density of patches increased 40.87 percents on the same period, and fractal dimension and shape index which reflected the shape of patches had increased in temporal scales, for the shape of patches more complex under the mankind disturbance.(3) The spatial variation of wetland landscape along the river was affected by a suite of natural and anthropogenic factors, such as hydrological and climate factors and various human activities.Urban construction and flood-proof projects were key factors to natural wetland conversation to non-wetland.Rapid population growth and economic development have significantly impact the spatial pattern of the landscape of study areas.
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    Forming Characteristics of Gap in an Evergreen Broad-leaved Forest in Tiantong National Forest Park,Zhejiang Province,Eastern China(Chinese)
    JIANG Liang-cai;LIU Li-zheng;WANG Xi-hua
    Journal of East China Normal University(Natural Sc    2007, 2007 (6): 88-96.  
    Abstract3317)      PDF (830KB)(557)      
    Gap is a common disturbance regime in forest ecosystem.This paper studied their forming characteristics in an evergreen broad-leaved forest in Tiantong National Forest Park, Zhejiang Province.The results showed: the linear gap density in the forest is 17.08 gaps/km, the expanded gaps occupy 15.42%, and canopy gaps occupy 5.46%.The yearly gap forming frequency is 0.287% and the forming rotation is about 348.4 a.The gap size is smaller than other regions, its expanded gaps vary from 39.3 m2 to 251.2 m2 and the average size is 106.32 m2.Canopy gaps vary from 11.8 m2 to 131.9 m2 and the average size is 37.68 m2.Standing litter, wind damage and selective lumber are main manners of gaps formation, most of gap-makers are Schima superba, Pinus massoniana, Castanopsis fargesii, Lithocarpus glaber, Lithocarpus harlandii,and so on.They are all dominant species in tree layer in this region.The types of gap-makers are different at different landforms.The average gap-maker number in each gap is 1.76, the main distribution range of Base Diameter(BD)of gap-makers is from 20 cm to 40 cm,and their average BD is 28.93 cm.
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    Effects of Artificial Diets on Female Propylea japonica’s Feeding and Body Composition(Chinese)
    LI Kai;ZHANG Tian-shu;ZHANG Li-li;WANG Bin;WANG Qun
    Journal of East China Normal University(Natural Sc    2007, 2007 (6): 97-105.  
    Abstract3306)      PDF (815KB)(470)      
    This paper studied the effects of artificial diets on the female Propylea japonica’s feeding and body composition.And the results indicated that the feeding amount of ladybird increased sharply at the initial days after eclosion, and then decreased gradually.The feeding amount and the consumption index (CI) of the beetles fed on cotton aphid were three to four times higher than that of the beetles fed with artificial diets.The feeding amount of the beetles fed with diet containing sucrose was significantly higher than that of the beetles fed with diets without sucrose, which proved that the sucrose had the function of increasing food intake for Propylea japonica; As to the relative growth rate(RGR) and approximate digestibility(AD) , there existed significant difference between the control and the beetles fed with artificial diets, due to the unbalance of the nutrition or existing some antinutritional facts in the artificial diets probably.While the Efficiency of conversion of ingested food (ECI) and the efficiency of conversion of digested food (ECD) in the control were significantly higher than that in beetles fed with artificial diets, which was probably the strategy of the insects whose food intake was low to survive.Furthermore, the results indicated that the dietary sucrose could improve AD, ECI and ECD of the artificial diets.As to the effects of the artificial diets on the body composition, the results showed that contents of moisture, crude protein and crude fat of female Propylea japonica were 58.77%,15.93% and 11.30%,respectively.And the analysis of the female fatty acids indicated that unsaturated fatty acid (USFA) was the major contents.In monounsaturated fatty acids (MUFA) and the polyunsaturated fatty acids (PUFA), the highest contents were oleic acid (1C18 n-9) and linoleic acid (2C18 n-6) respectively.The dietary sucrose could increase the content of crude protein in Propylea japonica,and the dietary olive oil could increase the content of crude fat significantly.The USFA content (72.70%) of the beetles fed with artificial diets was higher than that of control (58.00%).Supplementing 0.5% olive oil in diet could remarkably increase the content of USFA,specially of oleic acid (1C18 n-9), due to the rich oleic acid content in olive oil.
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    Ciliature Microtubule Differentiation of Euplotes encysticus in Different Physiological Conditions(Chinese)
    NIU Yan-ning;WU Yue-hua;NI Bing;GU Fu-kang
    Journal of East China Normal University(Natural Sc    2007, 2007 (6): 106-111.  
    Abstract3285)      PDF (610KB)(385)      
    The ciliature microtubules of Euplotes encysticus and their structural differentiation during asexual division, encystment and excystment were investigated by using FLUTAX staining and fluorescence microscopic techniques.(1) During morphogenesis, the close gathered kinetosomes of FVT-cirri become separated from each other, disintegrate and disappear gradually.The base bodies of dorsal cilia expand gradually and in the mean time the peripheral microtubules in basal bodies apart gradually from each other forming a plum blossom-like arrangement.Afterwards, the bands of granular cilia-anlagen occur in the corresponding cortical generating regions.(2) During encystment, AZM, PM, FVT-cirri and other organelles undergo a partial dedifferentiation process, i.e.with the condense of cell body, ciliatures aggregate each other at the ventral part of the spherical cyst cell body and the dorsal cilia arrange at the dorsal part with original pattern.(3) During excystment, the cell body swells as water is absorbed into the cell and becomes amoeba-like in shape.During this developmental stage, although weak fluorescence could be detected all over the cell, the fluorescence image of microtubules was never observed.The differentiated cell gets out of the cyst through a dorsal small pore of cyst wall and becomes a morphologically normal ciliate.Some tracks of dorsal cilia could be found at the dorsal part of the cyst wall left over during excystment.
    Based on the above results, following conclusions were suggested: during morphogenesis, the microtubules of ciliatures may have some contributions to the construction of new structures of the ciliate; during excystment, the microtubular structures have a further differentiating process, accompanying the differentiation of ameba-like shaped cell body.After these developmental events, all microtubules may go through a futher step of assembling and morphogenesis.
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    Difference of Killing Effects of Dual-targeting Oncolytic Adenovirus on Tumor and Normal Cells(Chinese)
    ZHANG Wei;ZHANG Hong-feng
    Journal of East China Normal University(Natural Sc    2007, 2007 (6): 112-119.  
    Abstract2980)      PDF (730KB)(479)      
    To reduce the killing effect of oncolytic adenovirus on normal cells and get safe clinical application, oncolytic adenovirus AdCN103, a novel dual-targeting tumor specific proliferating virus,was constructed by replacing the wild type adenovirus E1A promoter with the promoter of human telomerase reverse transonptase (hTERT) and mutant E1A lacking CR2 region.The single-controlled recombinant adenovirus was generated with either 24 bp deleted E1A (AdCN101) or wild-type of E1A driven by hTERT promoter (AdCN102).〖JP〗Killing effects of AdCN103 on several different tumor cells and normal cells were detected by crystal violet dye method and MTT assay.The virus replicating ability was assessed by virus progeny assay.The result shows that AdCN103 can selectively replicate in tumor cells and it has an overt cytopathic effect.Meanwhile, there is a dramatic reduction of cytotoxicity in normal cells infected with AdCN103 compared with its corresponding control vectors.Such protocol may have important applications for cancer gene therapies in the future.
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    Alternative Splicing of Rh Messenger RNA Isoforms(Chinese)
    ZHANG Yu-xian;LI Qin;ZHU Zi-yan
    Journal of East China Normal University(Natural Sc    2007, 2007 (6): 120-124.  
    Abstract3072)      PDF (466KB)(434)      
    This study aimed at analyzing transcription of RHD gene in erythroid cells and non-erythroid cells,and further comparing transcription of RHD gene in individuals with different expression levels of D phenotype.The technique of reverse transcriptase polymorphism chain reaction(RT-PCR) and cDNA sequencing was used to detect RhD mRNA of HL-60,K562,Jurkat,THP-1,HECF and white blood cells from ten unrelated individuals with different Rh phenotypes(2 CCDEe,2 CCDee,2 ccDee,2 CcDee,ccDEe and CcDEe)and reticulocyte from additional ten unrelated individuals with different Rh phenotypes(3 CcDEe,2 CCDEe,2 CCDee,2 CcDee and 1 CCDuee).Results showed except erythroid cells, RhD mRNA was absent in HL-60,Jurkat,THP-1,HECF and nuclear cells of peripheral blood.K562 had a normal RHD transcript.RhD cDNA of reticulocyte from different Rh phenotypes was complex and some absent exon 7, exon 9,exon 7~9,or exon 4~9,but all with normal RHD transcript.Conclusion Multiple RHD transcript is produced by alternative splicing.All these Rh messenger RNA isoforms existing in erythroid cells,such as reticulocyte and K562,absent in white blood cells.
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    Epiphyllous Liverworts of the Maoershan Nature Reserve, Guangxi, China(Chinese)
    NAN Zi;ZHU Rui-liang
    Journal of East China Normal University(Natural Sc    2007, 2007 (6): 125-130.  
    Abstract2900)      PDF (491KB)(408)      
    The epiphyllous liverworts of the Maoershan Nature Reserve of Guangxi Province were reported for the first time through field surveying and data refereeing.There are 19 species of epiphyllous liverworts belonging to eight genera of three families in Maoershan Nature Reserve, including 16 species new to the area investigated, and 15 species belonging to the typical epiphyllous liverworts.Colura tenuicornis and Drepanolejeunea foliicola are new to the liverwort flora of Guangxi.The epiphyllous Colura is newly reported for Guangxi.The number of East Asian species accounts for 36.84% of the total number of the epiphyllous liverworts in Maoershan Nature Reserve.Such a result reveals that the epiphyllous flora of Maoershan is closely related to the East Asian flora of the epiphyllous liverworts.
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    New Records of Mosses from Zhejiang Province(Chinese)
    LIU Yan;CAO Tong
    Journal of East China Normal University(Natural Sc    2007, 2007 (6): 131-134.  
    Abstract3072)      PDF (343KB)(524)      
    Based on the investigation and specimen identification of bryophytes from urban areas of Hangzhou city, Zhejiang province, five new records were reported.Leskeella pusilla (Mitt.) Nog.is recorded for the first time from China.Syntrichia sinensis (C.Müll.) Ochyra, Physcomitrium coorgense Broth, Lindbergia japonica Card.and Haplocladium strictulum (Card.) Reim.are new to Zhejiang province.In addition, Syntrichia is also a new genus to Zhejiang.The major taxonomic characters, habitats and geographical distributions of these species are presented in this paper.The species of Leskeella pusilla and Lindbergia japonica are illustrated.
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    (Chinese)
    Journal of East China Normal University(Natural Sc    2007, 2007 (6): 135-136.  
    Abstract2363)      PDF (149KB)(269)      
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