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Relativistic Scattering States of Coulomb Potential Plus a New Ring-Shaped Potential

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Communications in Theoretical Physics 2006年第5期45卷 889-893页

作者： CHEN Chang-Yuan LU Fa-Lin SUN Dong-Sheng Department of Physics Yancheng Teachers College Yancheng 224002 China

In this paper, exact solutions of scattering states of the Klein-Gordon equation with Coulomb potential plus a new ring-shaped potential are studied under the condition that the scalar potential is equal to the vector potential. The normalized wave functions of scattering states on the “k/27π scale” and the calculation formula of phase shifts are presented. Analytical properties of the scattering amplitude are discussed.

关键词： Coulomb potential plus a new ring-shaped potential scattering states phase shifts Klein-Gordon equation

Identification of suitable reference genes for quantitative gene expression analysis in clam Cyclina sinensis under salinity stress and Vibrio infection

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Journal of Oceanology and Limnology 2023年第1期41卷 352-363页

作者： Fengjuan JIANG Qingyao WANG Jingjing DU Fu LÜ Qing NIE Weihong ZHAO college of Marine and Biological Engineering Yancheng Institute of TechnologyYancheng 224051China

The appropriate reference gene is a prerequisite for accurate normalization of gene expression level,and research on suitable reference genes in clam Cyclina sinensis is *** improve the situation,we selected five commonly used housekeeping genes,including β-actin,Elongation factor 1-α(EF1-α),Glyceraldehyde-3-pho sphate dehydrogenase(GAPDH),40S ribosomal protein S18(RPS18),and Tubulin a(TUB-α),then evaluated their expression stability in different adult tissues and under different experimental treatments(salinity stress and Vibrio parahaemolyticus infection).Their expression stability was analyzed by three frequently used programs,geNorm,NormFinder,and *** analysis indicated that multiple genes should be used for normalization,and we concluded that the reference gene combination GAPDH-RPS18-β-actin,should be used for qRT-PCR analysis in different tissues of *** under normal physiological *** the clams under salinity stress and Vibrio infection,EF1-α-GAPDHRPS18 was recommended as the gene combination for qRT-PCR ***-αwas generally poorly ranked by all programs,and should not be used in future *** study should provide fundamental support for accurate quantitative gene expression analysis of this species.

关键词： Cyclina sinensis reference gene different tissues salinity stress Vibrio infection

Fabrication of Sulfated Silk Fibroin‑Based Blend Nanofbrous Membranes for Lysozyme Adsorption

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Advanced Fiber Materials 2022年第1期4卷 89-97页

作者： Ying Zhou Jiaxue Wu Yanyi Li Wei Zhang Yushan Zou Lian Duan Xiao Yang Bo Xiao Shixiong Yi State Key Laboratory of Silkworm Genome Biology College of SericultureTextile and Biomass SciencesSouthwest UniversityBeibei 400715ChongqingPeople’s Republic of China college of Textiles Yancheng Polytechnic CollegeYancheng 224005JiangsuPeople’s Republic of China

In this work,the silk fbroin/cellulose blend nanofbrous membranes modifed with sodium-3-sulfobenzoate(S-SCBNM)were fabricated by electrospinning technique for lysozyme *** morphology and structure of membranes was *** efect of sulfate contents,pH values and concentration of lysozyme on adsorption performance were studied,*** reuse capacity was *** results showed that the resultant S-SCBNM exhibited integrated properties of ultrathin fber diameter(148 nm),fast adsorption equilibrium,excellent adsorption performance(636 mg g−1)and good *** envision that this new class of green and natural blend membranes is particularly promising for the development of proteins separation.

关键词： Silk fbroin Cellulose acetate Nanofbrous membranes Lysozyme Adsorption

Molecular and Crystal Structure of 1-(4-Chlorophenyl)-3-(2-nitrophenyl)-1-triazene

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Chinese Journal of Structural Chemistry 2001年第1期20卷 27-30页

作者：费正锆张德纯 Department of Chemistry Yancheng Teachers CollegeYancheng224002 Department of Chemistry Suzhou UniversitySuzhou215006

The title compound, 1 (4 chlorophenyl) 3 (2 nitrophenyl) 1 triazene (C 12 \|H 9ClN 4O 2, M r =276.68) crystallized in the orthorhombic system,space group Pbca (#15), with a=7.040(1), b=13.520(2), c=26.253(3), V=2498.8(6) 3, D c =1.471g/cm 3, Z=8, μ (Mo Kα )=0.309mm -1 , F (000)=1136. The final R and wR are 0.0345 and 0\^0608 for 2428 observed reflections ( I>2σ(I) ), respectively. The title molecule has trans geometry about the central triazenyl linkage. The dihedral angle between the two phenyl rings is 5.5(2)° and the twist angle for the nitro group is 6.9(2)°. The whole molecule is almost coplanar, which results mainly from the intramolecular hydrogen bonds and the resonance effect in the middle of the skeleton. In the crystal structure, the inversion centre related molecules are packed anti parallely into mixed stacks through π…π interactions along [100] direction, and the interstack forces are mainly the hydrogen bonds and van der Waals interactions.

关键词： molecular structure crystal structure resonance effect triazene

Quantitative Correlation of the Acute Toxicity of Phenylthio-carboxylates with Their Structural and Thermodynamic Parameters by DFT Calculation

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Chinese Journal of Structural Chemistry 2005年第2期24卷 145-150页

作者：韩香云王遵尧杨春生 Department of Chemical Engineering Yancheng Institute of TechnologyYanchengJiangsu 224003China Department of Chemical Engineering Yancheng Institute of TechnologyYanchengJiangsu 224003ChinaCollege of EnvironmentNanjing UniversityNanjingJiangsu 210093China

Phenylthio-carboxylates were computed at the B3LYP/6-31G* level with DFT method. Based on linear solvation energy theory, the structural parameters were firstly taken as theoretical descriptors, and the corresponding linear solvation energy relationship (LSER) equation (r = 0.8989) to the toxicity of photobacterium phosphoreum (–lgEC50) was thus obtained. Then the structural and thermodynamic parameters were taken as theoretical descriptors, and as a result the other corresponding correlation equation (r = 0.9274) relating to –lgEC50 was provided. The two equations achieved in this work by B3LYP/6-31G* are both more advantageous than that from AM1.

关键词： acute toxicity linear solvation energy theory DFT method quantitative structure-activity relationships (QSAR) aquatic life

ADSORPTION OF 2,4-DICHLOROPHENOL IN AQUEOUS SOLUTION ONTO ADSORPTION RESIN MODIFIED BY N-ACETYLANILINE

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Chinese Journal of Polymer Science 2007年第3期25卷 263-269页

作者：费正皓 Jiangsu Provincial Key Laboratory of Coastal Wetland Bioresources and Environmental Protection Department of Chemistry of Yancheng Teachers' CollegeYancheng 224002China

A hypercrosslinked adsorption resin （ZH-05） modified by N-acetylaniline in the post crosslinking process was prepared. The adsorption properties of ZH-05 toward 2,4-dichlorophenol in comparison with granular activated carbon （GAC） and Amberlite XAD-4 were observed. The present study mainly focuses on the static equilibrium adsorption behaviors, desorption profiles and the proof of chemisorption. The results show that the Langmuir equation can give a perfect fitting to experimental data, and high temperature was favorable for adsorption of 2,4-dichlorophenol on ZH-05. A related equation was used to correlate the amount of chemisorption and the suppositionai chemisorption equilibrium concentration of adsorbate in aqueous solution. The adsorption capacities from different ranges of temperature and the static desorption experiment both reveal the same conclusion, i.e., the adsorption of 2,4-dichlorophenol from water on ZH-05 is a coexistent process of physical adsorption and chemical transition as on GAC.

关键词： Adsorption resin 2,4-Dichlorophenol Chemisorption Chemical modification

Studies on the Quantitative Structure-activity Relationship of Toxicity of Chlorophenol Serial Compounds in the ab initio Methods and Substitutive Position of Chlorine Atom (N_(PCS))

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Chinese Journal of Structural Chemistry 2007年第8期26卷 933-938页

作者： ZHENG Qing WANG Lian-Sheng Chemistry ＆ Bioengineering college Yancheng Institute of Technology Yancheng Jiangsu 224003 China School of the Environment Nanjing University Nanjing Jiangsu 210093 China

20 Quantum chemical parameters of chlorophenol compounds were fully optimized by using B3LYP method on both 6-31G^＊ and 6-311G^＊ basis sets. These structural parameters are taken as theoretical descriptors, and the experimental data of 20 compounds＇ aquatic photogen toxicity（-lgEC50） are used to perform stepwise regression in order to obtain two predicted -lgEC50 correlation models whose correlation coefficients R^2 are respectively 0.9186 and 0.9567. In addition, parameters of chlorine atom＇s substitutive positions and their correlations （NPCs） are taken as descriptors to obtain another predicted -lgEC50 model with the correlation coefficient R2 of 0.9444. Correlation degree of each independent variable in the three models is verified by using variance inflation factors （VIF） and t value. In the cross-validation method, cross-validation coefficients q^2 of 3 models are respectively 0.8748, 0.9119 and 0.8993, which indicates that the relativity and prediction ability of this model are superior to those of the model obtained by topological and BLYP methods.

关键词： chlorophenol toxicity (-lgEC50) linear dissolving energy theory density functional theory (DFT) substitutive position of chlorine atom (NPCS) QSAR

Preparation and characterization of LSO-SDC composite electrolytes

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Journal of Rare Earths 2015年第3期33卷 304-309页

作者：施庆乐张华李天景于方丽侯海军韩朋德 School of Materials Engineering Yancheng Institute of Technology college of Materials Science and Engineering Nanjing Tech University yancheng Institute of Industry Technology

The properties of LSO-SDC composite electrolytes prepared by the mixed powder with different LSO/SDC mass ratios were studied. The apatite-type lanthanum silicates La10Si6O27（LSO） and Sm0.2Ce0.8O1.9（SDC） were synthesized via sol-gel process and glycine-nitrate process（GNP）, respectively. The phase structure, microstructure, relative density, thermal expansion properties and oxygen ion conductivity of the samples were investigated by means of techniques such as X-ray diffraction（XRD）, scanning electron microscopy（SEM）, Archimedes method, dilatometer, and AC impedance spectroscopy. The results showed that SDC addition to the samples could enhance the density of the samples. However, the LSO-SDC composite electrolyte sintered at 1550 oC was over sintering when the SDC content was 50 wt.%. At the lower content of SDC（0–10 wt.%）, the decrease of conductivity was predominantly attributed to the reducing concentration of carriers. However, the conductivities of the composite electrolytes increased with the increasing SDC content（10 wt.%–40 wt.%） because of the enhanced percolation of highly conductive SDC component in the microstructure of composite electrolytes. In addition,the dependence of conductivity on p（O2） showed that LSO-SDC composite electrolytes were stable in the examined range of p（O2）.

关键词： LSO-SDC composite electrolytes relative density conductivity rare earths

PROBABILISTIC NORM OF LINEAR OPERATORS ON PN SPACE

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Applied Mathematics and Mechanics(English Edition) 1997年第3期18卷 307-313页

作者：肖建中蒋兴国 Jiangsu yancheng Educational Institute Yancheng PR China Agricultural college of Yangzhou University Yangzhou PR China

In this paper, the new definition of probabilistic norm of linear operators on a PN space is given. In virtue of this, the boundedness of linear operators is described and the completeness of the PN space composed of ... 详细信息

关键词： PN space operator probability norm