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Journal of Jilin University Science Edition
ISSN 1671-5489
CN 22-1340/O
主 任:韩啸
编 辑:赵立芹 王健 单凝 李琦
电 话:0431-88499428
E-mail:sejuj@jlu.edu.cn
地 址:长春市南湖大路5372号
    (130012)
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Table of Content
26 September 2008, Volume 46 Issue 05
数学
Global Solvability of Nonlinear Diffusion Equations with Forcing at the Boundary
LI Jian, GAO Wenjie, LIU Linlin
J4. 2008, 46 (05):  801-808. 
Abstract ( 1491 )   PDF (451KB) ( 494 )  
The present paper studied the global existence of nonnegative solutions of onedimensional Newtonian filtration equation with more general boundary fluxes term, reaction, diffusion and convection. The global existence of solutions for such problems was proved by means of a differential inequality involving the Lr+1norms of solutions and the limit solution method, coming to the conclusion that the nonnegative global solution exists.
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A Numerical Method for Initial Value Problem of Elliptic Equation
ZHANG Ye,, MA Fuming
J4. 2008, 46 (05):  809-815. 
Abstract ( 1641 )   PDF (447KB) ( 410 )  
We considered an initial value problem of elliptic equation. This problem is severely illposed, so we must use regularization in the solving process. When the spectrum of the operator consided here satisfied some proper conditions, we made use of a specific form of spectrum decomposition to decompose the solution, and introduced a regularization method in a specifical subspace. We used this method to develop a numerical computation for an initial value problem of Laplace equation. The numerical experiments demonstrate that this method is efficient.
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Linear Summation of Double Fourier Series on a Parallel Hexagon Domain
WANG Shuyun, LIANG Xuezhang, SUN Yi
J4. 2008, 46 (05):  816-824. 
Abstract ( 1169 )   PDF (535KB) ( 407 )  
A new method of linear summation of double Fourier series was put forward on a parallel hexagon associated with 3directional partition. A specific summation factor was so constructed that an integral operator with the summation factor converged uniformly to any given continuous function with periodic domain Ω, where Ω is a parallel hexagon domain. Furthermore, the convergence order of the operator was presented for the smooth approached function.
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Generalized Strong Practical Stability of 1-DOF Model
CHEN Xumei, WANG Linjun, ZHANG Ran
J4. 2008, 46 (05):  829-835. 
Abstract ( 1413 )   PDF (360KB) ( 389 )  
The present paper deals with the generalized strong practical stability of the concrete 1-DOF model. The model could be described as a Filippovtype discontinuous system. The generalized strong practical stability of this model was proved. Furthermore, numerical experiments were carried out. The numerical experiments agreed with the theorical result.
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Maximum Likelihood Estimation of Ratios of Means and Standard Deviations from Normal Populations under Treeorder Restriction
JI Yonggang, LI Shuyou, ZHAO Shishun, SHI Haifang
J4. 2008, 46 (05):  829-835. 
Abstract ( 1354 )   PDF (392KB) ( 363 )  
For knormal populations with unknown means μi and variances σ2i>0 (i=1,2,…,k), it is assumedthat there is a treeorder restriction between ratios of means and standard deviations. According to the method of isotonic regression, a procedure of obtaining the maximum likelihood estimators of μi's and σi's under the treeorder restrictions is proposed. In the case of k=7, some connected results and simulationresultsare given.
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Approximate Bayesian Estimation for Parameters inPoisson Regression under Quadratic Loss Function
ZHAO Zhiwen,, WANG Dehui, LI Han
J4. 2008, 46 (05):  836-840. 
Abstract ( 1478 )   PDF (321KB) ( 472 )  
It is, more often than not, difficult to gain the concret posterior distribution of Poisson regression after priori distribution of parameters is given. This paper provides an approximate likelihood function of the parameters according to the property of the large sample of Γdistribution and their approximate posterior distribution. The simulation study shows that the Bayesian estimation performs well based on the approximate posterior distribution.
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Optimality Conditions for Super Saddle Points of Setvalued Optimizition
XIAO Mingli, XU Yihong
J4. 2008, 46 (05):  841-844. 
Abstract ( 1236 )   PDF (271KB) ( 366 )  
In Hausdorff locally convex spaces, the concept of super saddle points of a setvalued map is introduced by means of Lagrange setvalued map for the setvalued vector optimization problem (SOP). Two scalarization lemmas are proved, and the theorem of super saddle points and the equivalent characterization of super saddle points are obtained by the separation theorem o f convex sets. Therefore the issues charactering super efficiency by super saddle points are solved.
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KAM Tori for 1D Wave Equations
GAO Yixian, LV Xianrui, WU Dongxu
J4. 2008, 46 (05):  845-848. 
Abstract ( 1429 )   PDF (388KB) ( 420 )  
This paper concerns one dimensional (1D) nonlinear wave equations. We can prove the existence of a Whitney smooth of smallamplitude quasiperiodic solution under the antiperiodic boundary conditions. The proof is based on an infinitedimensional KAM (KolomogorovArnoldMoser) theorem.
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Stochastic Integral of Local Square Strong Martingale
REN Xiaohong, ZHANG Zhuokui, CHEN Huichan
J4. 2008, 46 (05):  849-852. 
Abstract ( 1259 )   PDF (247KB) ( 379 )  
Based on the definition of the stochastic integral of local square strong martingale, the properties of the stochastic integral of local square strong martingale were discussed. Some important results that the stochastic integral of local square strong martingale have the properties of stopping and so on were obtained.
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Controllability and Observability of Network ControlSystem Based on Singular Control System
SUN Fengqi
J4. 2008, 46 (05):  853-859. 
Abstract ( 1093 )   PDF (492KB) ( 328 )  
We discussed the networked control system which is based on singular control system. According to the actual conditions, we set up the models which have the network induced delay and give the respondence of state, and give the new definitions about the case and effect character. The necessary and sufficient conditions for the state controllability, output controllability and state observability of the networked control system were presented. Finally we discussed the duality and gave an example to prove the theorem.
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Fast Algorithm of Minimal Norm Least Squares Solutionfor Loewnertype Linear System
TONG Qiujuan,, LIU Sanyang, LU Quan
J4. 2008, 46 (05):  860-864. 
Abstract ( 1223 )   PDF (335KB) ( 398 )  
A new fast algorithm of the minimal norm least squares solution for the linear system whose coefficient matrix is an m×n Loewnertype matrix with full column rank is given by forming a special block matrix and researching its triangular factorization. Its computation complexity is O(mn)+O(n2), but that of usual algorithms is O(mn2)+O(n3).
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A Class of New Composite Implicit Iteration Process for Common Fixed Points of a Finite Family of Strictly Pseudocontractive Maps
RAO Ruofeng, WANG Xiongrui
J4. 2008, 46 (05):  865-869. 
Abstract ( 1234 )   PDF (336KB) ( 298 )  
In view of the existence theory for fixed point of a continuous pseudocontractive mapping, a new composite implicit iterative process with errors for a finite family of strictly pseudocontractive mappings is introduced reasonably in a real smooth Banach space. We have proved by means of the Petryshyn’s inequality that the iterative process converges strongly to a fixed point of the family of strictly pseudocontractive mappings under some suitable conditions.
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Extremal Selfdual Binary Codes with Automorphisms with Type 3-(12,2)
FAN Jiqiu,, XIE Jingran, YANG Qing
J4. 2008, 46 (05):  870-872. 
Abstract ( 1111 )   PDF (224KB) ( 342 )  
The present paper presented an algrithom to find generator matrices of extremal selfdual binary codes of length 38 with the automorphisms of type 3-(12,2). By implementing Visual C++ procedures, we obtained such new extremal codes and determined the codes to meet the weight enumerator W2.
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Effects of Small World Connection on the Stability of a Neural Network
XU Xu, ZHANG Jie, LIANG Yanchun
J4. 2008, 46 (05):  873-876. 
Abstract ( 1447 )   PDF (262KB) ( 302 )  
We made a detailed analysis on the dynamics of a time delay network with small world connection. On the basis of Lyapunov stability approach, we investigated the stability of the system firstly and presented a delaydependent criteria ensuring global stability. We further analyzed the effects of small world connection strength on systemic global stability.
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Optimality Conditions of Nonsmooth Composite Generalized Invex Multiobjective Programming
WANG Cailing, SUN Wenjuan, YANG Rong, WANG Xiaoling
J4. 2008, 46 (05):  877-879. 
Abstract ( 1299 )   PDF (220KB) ( 342 )  
The composite Q-ρinvex vector function and composite S-δinvex vector function are introduced, which are applied to nonsmooth composite multiobjective programming, the optimality conditions of nonsmooth composite Q-ρinvex and S-δinvex multiobjective programmings are obtained and proved.
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Bayesian Network Construction of College Mathematics CoursesBased on Genetic Algorithms
HAO Lili, LAI Min, HAO Lizhu
J4. 2008, 46 (05):  880-884. 
Abstract ( 1424 )   PDF (486KB) ( 354 )  
We utilized the K2 algorithms and adaptive genetic algorithms to construct Bayesian network of college mathematics courses on the basis of 1984~2005’s 10 courses scores of school of statistics from a certain university. As far as the construction is concerned, it uses the information in the sample of students’ scores, combines Directed Acyclic Graph (DAG) with the theory of probability organically, intuitively reveals the dependencies of the courses and incarnates how strong thedependenciesare according to conditional probability table. Not only dose it offer the reference value on courses setting in different terms, but also it provides evidence for students’ advanced studies and option of research direction which is the most suitable.
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计算机科学
Structure Analysis and Optimization Implementation of Advanced Encryption Standard Algorithm
YUAN Wei, HU Liang, LIN Yu, ZHANG Yunlong, HUANG Rui, LI Hongtu
J4. 2008, 46 (05):  885-890. 
Abstract ( 1572 )   PDF (440KB) ( 518 )  
To explain the function of each part of the algorithm we make a detailed analysis of the structure and implementation of AES algorithm. Researching the details of the algorithm, we summarized the characteristics of it, optimized and merged the steps of each round of the algorithm. In order toreduce the complexity of decryption algorithm and make it have the same structure with the encryption algorithm, we changed the order of the decryption algorithm and proved the correctness of this change.
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A Hybrid Optimization Algorithm for Function Optimizationin Noisy Environment
YUE Na, OUYANG Dantong, ZHANG Changsheng, LIU Yuxi
J4. 2008, 46 (05):  891-896. 
Abstract ( 1445 )   PDF (512KB) ( 344 )  
A hybrid algorithm was proposed to solve function optimization problems in noisy environment which combined the Unified Particle Swarm Optimization Scheme, hypothesis test and optimal computing budget allocation technique together. The algorithm has good abilities of exploration and exploitation. Numerical simulations based on several representative benchmark problems were carried out in noisy environment and a comparison was made between UPSOOHT and several popular algorithms. Additionally, the influences of OCBA and noise magnitude were studied. The results show that UPSOOHT has a better performance.
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Arithmetics of Community Mining Based on Static SocialNetwork and Dynamic Social Network
YU Zhuoer, ZHOU Chunguang, YANG Bin, WANG Jianyuan, CAI Hua, XU Hao, WANG Zhe
J4. 2008, 46 (05):  897-902. 
Abstract ( 1755 )   PDF (609KB) ( 373 )  
On the basis of static and dynamic features of social network, we studied community mining problemin social network. We introduced the concept of limbic Ξ coefficient and closed threshold value etc., and Dets tructure algorithm for static social network. Focusing on the dynamic nature of social n etwork, weproposedthe amalgamation mining algorithm based on the attenuation strategy. Both the algorithms have made good results in application.
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Design and Implementation of Graphic Ontology Modeling Tool (GOM)
WANG Xuyan, LU Ning, FAN Renhong, JI Xiang, LIU Lei
J4. 2008, 46 (05):  903-910. 
Abstract ( 1312 )   PDF (613KB) ( 310 )  
The graphical set is designed based on the items of OWL Lite, which is a language designed for describing ontologies, to represent the ontologies in graphic structure and then the Graphic Ontology Modeling Tool (GOM) is designed and implemented. In the Graphic Ontology Modeling Tool, ontologies are represented by the graphic structure. The GOM can transform the ontologies represented by graphic constructions into ontologies represented by OWL Lite; besides, the GOM can also read OWL Lite files, and then transform the ontologies represented by OWL Lite into the ontologies represented by graphic structure. The GOM implements the transformation between the ontologies represented by OWL Lite and ontologies represented by the graphic constructions, improves the readability of the ontologies, and reduces the difficuties of the ontology modeling job.
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Nonlinear Totalvariation Denoising Model Based on AOS Method
ZHAO Shufeng,, LUO Hongwen, HUANG Chengqi, MA Si liang
J4. 2008, 46 (05):  911-914. 
Abstract ( 1859 )   PDF (488KB) ( 336 )  
An addtive operator splitting (AOS) method is employed in the nonlinear total variation model (ROF model) for image denoising. The numerical discretization scheme is semiimplicit and unconditional stable. It overcomes the time step size restriction for explicit scheme. The method can easily be parallelized and one can gain an accelerated convergence. The experiments show that it is extremely promising compared to the explicit scheme.
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Compute All Maximal(NE/SNE) Repeats in a Stringwith Horizontaldivision Method
YUAN Zhe, ZHAO Yongzhe, ZHANG Wenrui, ZHU Xiangbin, ZHAO Dongwei
J4. 2008, 46 (05):  915-924. 
Abstract ( 967 )   PDF (629KB) ( 320 )  
We proposed a new methodhorizontaldivision method by which we can compute all the Maximal Repeats of string x using only suffix array SAx and LCP array LCPx. We analyzed the situatio ns and locations where the Maximal NERepeats and SNERepeats of xcan be. Then we designed three algorithms by which all Maximal Repeats, Maximal NERepeats, and Maximal SNERepeats in a string x[1…n] can be computed onlyby means of SAx and LCPx. The given algorithms overcome the defects of the corresponding algorithms which require other assistant arrays in addition to suffix array and LCP array. So our algorithms reduce the space requirement greatly. Moreover, the time complexity of these algorithms is not increased. In addition, we can get all the Ma ximal Repeats, Maximal NE Repeats and Maximal SNE Repeats of a string by only scanningLCP array once.
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Research of IDS Evaluation Method Based on Bayesian Theory
LI Ruixue,, FANG Zhiyi,, DAI Zhiming, YAN Youlai, XIAO Wei
J4. 2008, 46 (05):  925-929. 
Abstract ( 1440 )   PDF (494KB) ( 309 )  
A fresh IDS evaluation method based on Bayesian theory was proposed, and a more perfect Intrusion Detection System Evaluation System was thus designed and constructed. Meanwhile, the four important indices to evaluate IDS, that is, function index, performance index, security index and user availabilityindex, were established. The specific quantitative analysis about some of the major indices was made, moreover, the process of intrusion and detection was simulated with probability tree. The results show that the presented method can find the optimal balance between the detection rate and false alarm rate of the system.
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Protein Domains Prediction Method Based on Support Vector Machines
ZOU Shuxue, HUANG Yanxin, LI Yanwen, ZHOU Chunguang
J4. 2008, 46 (05):  930-934. 
Abstract ( 1437 )   PDF (454KB) ( 313 )  
Guessing the boundaries of structural domains has been an important and challenging problem in experimentand computational structural biology. A promising method for detecting the domain structure of a protein from sequence information alone was presented. The method is based on analyzing multiple sequence alignments that are derived from a database search. Multiple measures were defined to quantify the domain information content of each position along the sequence and were combined into a single predictor using support vector machines. The overall accuracy of the method for a single protein chains dataset is about 85%. The result demonstrates that the utility of the method can help not only predict the complete 3D structure of a protein but also study proteins’ building blocks of functional analysis.
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A Variable Step Size LMS Algorithm in Smart AntennasBased on Hyperbolic Tangent Function
ZHONG Huixiang, ZHENG Shasha, FENG Yueping
J4. 2008, 46 (05):  935-939. 
Abstract ( 1346 )   PDF (474KB) ( 430 )  
A variable step size least mean square algorithm in smart antennas is presented in this paper. The algorithm is established by introducing a hyperbolic tangent function relation between step size and signal error. The contradiction between the convergence speed and maladjustment error is thus solved. The simulationresults show that the proposed algorithm has faster convergence and smaller maladjustment than standard least mean square algorithm.
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An Algorithm of Online Handwritten Signature Verification Based on HMM
CHENG Kaidong, LUAN Fangjun, MA Siliang
J4. 2008, 46 (05):  940-943. 
Abstract ( 1216 )   PDF (387KB) ( 315 )  
The extracting method of special points in signature is presented, which are used as signature segment points, and the extraction and selection of the features of each segment are analyzed on the basis of which the algorithm of online handwritten signature verification using hidden markov model (HMM) is presented. The algorithm was examined by signature data from SVC 2004 (The First International Signature Veri fication Competition).
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Palmprint Recognition Method Based on Ridgelet Transform
WU Danyang, ZHANG Zhongbo, MA Siliang
J4. 2008, 46 (05):  944-946. 
Abstract ( 1252 )   PDF (346KB) ( 320 )  
A new contactless device was designed to collect high resolution palmprint images. A novel multiplescale feature extraction algorithm with a high resolution was proposed based on ridgelet transform. A coarsetofine hierarchical matching apporach was presented to improve the speed of feature matching on dealing with high rosolution images. Theoretical and experimental results demonstrate the effectiveness of the proposed algorithm.
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Application of Face Recognition to Prison Gallery Management System
LIU Miao, GUO Dongwei, MA Jie, ZHOU Chunguang
J4. 2008, 46 (05):  947-950. 
Abstract ( 1582 )   PDF (438KB) ( 367 )  
According to the feature of prison gallery management, we combined several classic algorithms, including complexion model, template matching and primary component analysis, to develop a realtime and effective human face recognition module. The testing results show that the model is satisfied in the specific application.
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物理
Dynamic Properties of Entanglement in Quantum Dicke Model
WANG Yongchao,, ZHU Hongbo, SONG Lijun, GAI Yongjie,
J4. 2008, 46 (05):  951-955. 
Abstract ( 1224 )   PDF (506KB) ( 312 )  
Under the condition of classical limit, quantized Dicke model shows the dynamical behavior of quantum chaos. The numerical calculation shows that there are some particular points in the classical phasespace at which the quantum chaos is present. The impact of initial conditions of these particular positions on entanglement of the model was analyzed respectively under RWA (rotatingwave approximation) or nonRWA. The evolutionary characteristics of the overall dynamics were studied in the phasespace for all the phase points considered to be under the initial condition. The conclusion obtained is that classical chaos will accelerate the generation of entanglement.
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Accurate Resistivity Measurement with Van Der Pauw Method in DAC
WU Bao jia,, HAN Yong hao
J4. 2008, 46 (05):  956-958. 
Abstract ( 1768 )   PDF (356KB) ( 433 )  
Using finite element analysis, the authors studied the relative error of the van der Pauw method for resistivity measurement in diamond anvil cell (DAC). It was found that the electrode contact area is a key factor affecting the accuracy of the van der Pauw method for resistivity measurement. Always the relative error increases with the increase of contact area, and this is especially obvious for semiconductor samples. But whether the electrodes have point contacts or not, the van der Pauw method would provide accurate result so long as the ratio of sample thickness to its diameter is less than 0.45, and the ratio of the side length of electrode contact area to sample diameter is less than 0.1.
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Continuum Analysis of High\|order Harmonic Generation Spectrum by an Ultra-short Laser Pulse
CHEN Ji gen, CHEN Yan qin, HUANG Wen long, YANG Yu jun
J4. 2008, 46 (05):  959-962. 
Abstract ( 1389 )   PDF (361KB) ( 293 )  
We investigated the high\|order harmonic generation (HHG) power spectrum by means of an ultra\|short laser pulse. Our numerical results show that the harmonics at the end of the plateau of HHG spectrum become successive compared with that of HHG spectrum by a long laser pulse. Three primary reasons cause this character: firstly, in the former, one or two irradiations contribute to the harmonic generation, while in the latter, the multi\|cycle accumulation of the harmonic generation causes separate sharp peaks; secondly, for the same HHG, the band width of the power spectrum of the former is wider than that of the latter; finally, the frequency spectrum of the short laser pulse is broader than that of the long laser pulse.
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Effect of Substrate Bias Voltage on Magnetic Properties of γ′-Fe4N Thin Films
ZHAO Li jun, WANG Li li, GONG Jie, ZHENG Wei tao
J4. 2008, 46 (05):  963-966. 
Abstract ( 1203 )   PDF (406KB) ( 382 )  
γ′-Fe4N thin films were deposited on single crystal Si (100) substrate by DC magnetron sputtering using an Ar/N2 gas mixture (N2/(Ar+N2)=10%). The structure and magnetic properties of the films were characterized via Xray diffraction (XRD) and superconducting quantum interference device (SQUID). The effect of substrate bias voltage on magnetic properties of γ′-Fe4N thin films were investigated. With the increase of substrate bias voltage, the efficiency of the reaction between Fe and N and the growth rate for γ′-Fe4N were improved, the films obtained were smooth, and the values of Ms for all the FeN films were almost the same, but their coercivity was decreased.
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Refractive Indices of Medium by Light-ray Optics Methods
GUO Shou yue, CAO Chun bin, SUN Zhao qi
J4. 2008, 46 (05):  967-970. 
Abstract ( 1101 )   PDF (333KB) ( 287 )  
Two interdependent differentiation equations between the ray cluster equation and dielectric refractive index function, i.e., light\|ray equation and refractive index equation were derived via Fermat principle and ray cluster equation. The expression of refractive index equation was presented in polar coordinate. Furthermore, the refractive index equation was applied to solving radial pattern index of cylinder lens in plane rectangular coordinates and radial pattern dielectric index in polar coordinate. The theoretical results are in good agreement with the facts.
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材料科学
SAXS Investigation the Precipitation of δ′ Phase in 1420 Alloy Treated by Aging-retrogression-reaging
MENG Fan ling, LI Yong hua, LIU Chang sheng, XU Yue, WANG Yu ming
J4. 2008, 46 (05):  971-973. 
Abstract ( 1127 )   PDF (298KB) ( 340 )  
Small-angle X-ray scattering (SAXS) was used to study the precipitation behavior of the δ′phase in 1420 alloy treated by aging-retrogressionreaging. The results show that the transition interfacial layer exists between the δ′ phase and the matrix after reaging for 5 h, but the transition interfacial layer disappears after reaging for 48 h. The gyration radius of the δ′ phase particles, RG was 9.32 nm for aging 80 h and 8.27 nm for reaging 80 h, respectively. This suggests that the δ′ phase particles coarsen is much slower during reaging treatment compared with that of aging treatment. With the reaging time increase, the δ′ phase grain size is not the same. 
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Mixed Amorphous Composites of NaNO2 and KNO2Prepared by Ice Sublimation Method
ZUO Gui hong,, LI Dong mei, MU Jia jia, CHEN Hai yong
J4. 2008, 46 (05):  974-978. 
Abstract ( 1267 )   PDF (360KB) ( 340 )  
The mixed amorphous composites of soluble salts NaNO2 and KNO2 were prepared by ice sublimation method. At the condition of n(NaNO2)∶n(KNO2)=1∶1, the relative intensity of the diffraction peak of the amorphous product reaches the maximum; and the length of short range order decreased from 6.7 nm to 4.8 nm while the proportion of NaNO2 to KNO2 increase. Specially, the minimum of 3.7 nm reaches at the condition of n(NaNO2)∶n(KNO2)=2∶1. So we believe new amorphous structure that is different from pure NaNO2 or KNO2 amorphous structure has been formed.
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化学
Influences of Surfactants on Fluorescent Properties of Watersoluble Fluorescent Polymer PPESO3
LI Dong, DOU Wenchao, ZOU Shen, SU Xingguang
J4. 2008, 46 (05):  978-982. 
Abstract ( 1338 )   PDF (474KB) ( 322 )  
We reported the effect of several kinds of surfactants on the fluorescent properties of a new watersoluble fluorescent polymer (PPESO3) synthesized in this paper. The results show that anionic surfactant can quench the fluorescence of PPESO3, the neutral surfactant can increase obviously the fluorescenceof PPESO3, and the cationic surfactant can also increase the fluorescence of PPESO3 in a general way. This kind of polymer can be developed into a sensitive sensor by virtue of the property of surfactant induced fluorescence enhancement. This study will provide a theoretical account for the study of water soluble fluorescent polymers such as PPESO3 and their biological applications.
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Studies on Interaction between Isorhamnetin and Bovine Serum Albumin and Effects of Several Metal Ionson Interaction by Spectrometry
ZHOU Xiuqing, CHENG Jianhua, SUN Lei, XU Haoyan, JIN Haiyan
J4. 2008, 46 (05):  983-987. 
Abstract ( 999 )   PDF (529KB) ( 300 )  
The interaction mechanisms of Isorhamnetin ( ISO) and bovine serum albumin (BSA), ISO and several metal ions as well as BSA and several metal ions were studied by means of ultraviolet visible absorption spectrometry and fluorescence spectroscopy. These experimental results show that the static gravitation was the major force of the combination about the interaction of ISO and bovine BSA. Flourescence of BSA was quenched by ISO with the static mechanism. The binding styles of several metal ions and ISO were studied, too. It shows the binding mechanisms of some complexes of the metal ions and ISO w ith BSA. It indicates that the interventions of metal ions affected the combination of ISO and BSA, they depressed their abilities of combination.
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Analysis of Trace Elements in Fur of Nyctereutes by ICP-AES
WANG Songjun, WANG Pujun, CHANG Ping, HOU Tianping
J4. 2008, 46 (05):  988-991. 
Abstract ( 966 )   PDF (399KB) ( 288 )  
The sample was prepared by low temperature dry ashing. Trace elements of fur tissue on furbearing animal (sludraccoon) were simultaneously analysed by inductively coupled plasmaatomic emission spectrometry (ICP-AES). The lowest quantitative determinable concentrations are between 1.0 ~9.0 ng/g grade for trace elements Ba,Be,Cd,Si,Y and Zn, and are between 0.01~ 0.09 μg/g grade for microelement B,Fe,La,Mg,Mo,Ni,Ti,Co,Cr,Cu,Sr,V and Zr, and are between 0.13~0.23 μg/g grade for In,Th,P and Pb. The lowest quantitative determinable concentration of Nb is 1.08 μg/g. This method was verified by national hairs standards GBW07601. The relative error is between 083%~959%. The relative standard deviation is between 081%~520%. The 22 elements were analysed for the fur of health and illness sludraccoon. The contents of elements B,Co,Cr a nd Ni of the health sludraccoon are apparently higher than the corresponding ones of illness sludraccoon. The content of elements Al,Ba,Be,Cd,Mo,Pb,Sr,Ti and Zr of the health sludraccoon were lower than the corresponding ones of illness sludraccoon. The determination data satisfy the standards of biological sample analysis.
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生命科学
Prokaryotic Expression, Purification and Renaturation ofRecombinant Human CDK4
CAO Yuhua, XU Jingjing, CHEN Yong, WANG Qi, FENG Jing, HAO Dongyun, LI Guiying
J4. 2008, 46 (05):  992-996. 
Abstract ( 1382 )   PDF (578KB) ( 340 )  
The expression vector pET28a-CDK4 was constructed by inserting human CDK4 cDNA into pET28a(+)and was identified by digestion with restriction enzymes and sequence analysis. Then an expressionstrain was selected after transformation of the recombined plasmid into E.coliBL21 (DE3), fusion protein with His tag was efficiently expressed in the form of inclusion body af ter IPTG induction and its content was approximately 52.6% of total bacteria pro teins. The inclusion body was washed, dissolved and purified by Ni2+ chelate chromatography under denatured condition. The purified inclusion body protein was renatured by the gradual removal of urea via dialysis in solubilization buffer. SDSPAGE analysis and Western blotting with an anti-CDK4 antibody showed that the fusion protein with a molecular weight of about 43000 was purifiedand its purity was up to 98%.
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The Newly Development of theEnzymecatalyzed Resolution Methods and Application
ZHANG Guoyan,, CAO Shugui
J4. 2008, 46 (05):  997-1000. 
Abstract ( 1355 )   PDF (432KB) ( 454 )  
The present paper described the recent research and application of chiral resolution by enzyme {catalysis}. The methods of kinetic resolution, dynamic kinetic resolution and enantioconvergence resolution were compared with each other. The steoroselective hydrolysis, transesterification and acylation of esters and amines catalyzed by enzymes, in particular, hydrolases in non-aqueous solution were also introduced {according} to the progress of research and the problems of technology.
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环境科学
Effects of Sample Aging on Distribution of Heavy Metals in Natural Surface Coatings Collected from Natural Waters
WANG Ting, WANG Xiaoli, DU Xianyuan, LIU Jianlin, CHEN Jiejiang, LI Yu,
J4. 2008, 46 (05):  1001-1005. 
Abstract ( 1260 )   PDF (536KB) ( 221 )  
Distribution of heavy metals in the natural surface coatings collected from the Songhua River was studied before and after their aging for 3 months. It was indicated that sample aging resulted in 11.17%~2627% manganese to turn from carbonateassociated and Fe/Mnoxides phases to exchangeable and residual phases. After sample aging, some iron associated with organic matters and residues (16.89%~24.97% of iron) transferred to Fe/Mnoxides phases. All copper associated with organic matters transferred to Fe/Mnoxidesand residual phases after aging. Exchangeable and organic mattersassociated zinc transferred to other phases completely because of aging.
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