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Chinese Chemical Letters 1998年第7期9卷 655-656页

作者： Chuan Ming JIN Chu Ru GONG Zhong Qiu HU Ming Hua YANG(Department of Chemistry, Hubei Normal University, huangshi 435002) Department of Chemistry Hubei Normal University Huangshi 435002 China

This paper introduces the synthesis of a new color reagent 1-(6-nitro-2-benzothiazolyl)3-(4-nitrophenyl)-triazene (NBTNPT) and the color reaction of NBTNPT with Cd (II) has been studied. In the presence of Triton X-100, the reagent with Cd (II) forms an orange-yellow complex (1:1) at pH=11.5-12.3, the molar absorptivity is 2.81x10(5)L . mol(-1)m(-1) by dual-wavelength spectrophotometry, Beers law is obeyed in the range of 0-280 mu g/L for Cd (II).

关键词： 1-(6-nitro-2-benzothiazolyl)-3-(4-nitrophenyl)-triazene spectrophotometry : Cd (II)

The Colour Reaction of Mercury with 1-(6-Ethoxyl-2-benzothiazolyl)-3-(4-Nitrophenyl)-Triazene and its Application

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Chinese Chemical Letters 1998年第3期9卷 277-279页

作者： Chuan Ming JIN Ming Hua YANG Chu Ru GONG Zhong Qiu HU(Department of chemistry,Hubei Normal University, huangshi 435002) Hubei Normal Univ Dept Chem Huangshi 435002 Peoples R China

A new triazene reagent 1-(6-ethoxyl-2-benzothiazolyl)-3-(4-nitrophenyl)-triazene (EtOBThTPT) has been synthesized. The colour reaction of EtOBTNPT with Hg(II) has been studied. At pH = 10.1-10.7, in the presence of Triton X-100, the reagent with Hg(II) forms an orange-yellow complex with high sensitivity. The molar absorptivity is 2.38 X 10(5) ***(-1).cm(-1). Beer's law is obeyed for Hg(II) in the range of 0-7 mu g/25 ml.

关键词： 1-(6-ethoxyl-2-benzothiazolyl)-3-(4-nitrophenyl)-triazene spectrophotometry mercury

Existence and Application of Optimal Markovian Coupling with Respect to Non-Negative Lower Semi-Continuous Functions

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Acta Mathematica Sinica,English Series 2000年第2期16卷 261-270页

作者： Shaoyi ZhangDepartment of Mathematics.Beijing Normal University,Beijing 100875,P.R.China Department of Mathematics,Hubei Normal University,huangshi 435002,P.R.China Department of Mathematics Beijing Normal University Beijing 100875 P. R. China Department of Mathematics Hubei Normal University Huangshi 435002 P. R. China

In this paper,for two given transition probabilities,the existence of the optimal Markovian coupling with respect to a non-negative lower semi-continuous function is *** an application of this result,the well-known Strassen’s theorem is ***,it is proved that the existence of an order-preserving Markovian coupling of two given jump processes is equivalent to their stochastical comparability.

关键词： Transition probability Markovian coupling Jump process

Effect of Annealing Temperature on the Ferroelectric Properties of BiFeO_3 Thin Films Prepared by Sol-gel Process

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Journal of Wuhan University of Technology(Materials Science) 2010年第3期25卷 384-387页

作者：王秀章 Hubei Key Laboratory of Pollutant Analysis & Reuse Technology School of Computer Science and Technology Huangshi Institue of Technology

Sol-gel process was adopted to prepare BiFeO3 ***3 films were deposited on LaNiO3 coated Si（100） substrates annealed at 500 and 550 ℃,*** X-ray diffraction results reveal that BiFeO3 film has a rhombohedrally distorted perovskite structure with space group *** film annealed at 500 ℃ has larger remnant polarization（Pr） of 35.3 μC/*** the film annealed at 550 ℃,smaller remnant polarization of Pr=4.8 μC/cm^2 is observed for its low breakdown electric *** leakage conduction is observed in the film annealed at 500 ℃ at low applied field.

关键词： multiferroics BiFeO3 thin film sol-gel method ferroelectricity dielectric property

Synthesis and Luminescent Properties of Eu^(3+)-Doped Na_(24)P_2W_(22)O_(83)

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Chinese Chemical Letters 1998年第10期9卷 911-912页

作者： Shui Jin YANG Ju Tang SUN and Zi Bin QIN(Depaltment of Chemistry, Hubei Normal University, huangshi, 435002 Department of Chemistry, Wuhan University, Wuhan 430072) Department of Chemistry Hubei Normal University Huangshi 435002 China Department of Chemistry Wuhan University Wuhan 430072 China

The Eu3+-doped Na24P2W22O83 has been prepared by solid state reaction, and characterized by element analysis, infrared spectroscopy, powder X-ray diffractometry. The emission and excitation spectra were measured. The ... 详细信息

关键词： heteropolytungstate europium crystal structure phosphor

Oscillatory and Asymptotic Behaviour of Fourth Order Nonlinear Difference Equations

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Acta Mathematica Sinica,English Series 1997年第1期13卷 105-115页

作者： Yan Jurang (Department of Mathematics,Shanxi University,Taiyuan,030006,China)Liu Bin (Department of Mathematics,Hubei Normal University,huangshi,435002,China) Department of Mathematics Shanxi University Taiyuan China Department of Mathematics Hubei Normal University Huangshi China

This paper considers a class of fourth order nonlinear difference equations Δ2（rnΔ2yn）+ f（n,yn）=0,n∈N（n0）,where f（n,y）may be classified as superlinear,sublinear,strongly super- linear and strongly *** superlinear and sublinear cases,necessary and sufficient conditions are obtained for the difference equation to admit the existence of nonoscillatory solutions with special asymptotic *** strongly superlinear and strongly sublinear cases,sufficient conditions are given for all solutions to be oscillatory.

关键词： Nonlinear difference equation Oscillation Asymptotic behaviour.

Thermal Behavior and Non-isothermal Kinetics of the Polyoxometalate of Ciprofloxacin with Tungstophosphoric Acid

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Journal of Wuhan University of Technology(Materials Science) 2007年第2期22卷 240-244页

作者：汪敦佳 Hubei Key Laboratory of Bioanalytical Technique Department of Chemistry and Environmental EngineeringHubei Normal University

The polyoxometalate （CPFX-HCl）3H3PW12O40·.8H2O was prepared and characterized by elemental analysis, IR spectra and TG-DTA-DTG. The thermal decomposition mechanism and non-isothermal kinetic parameters of the polyoxometalate were obtained from the analysis of TG-DTG data using the Achar equation, Coats-Redfern equation （CR）, Madhusudanan-Krishnan-Ninan equation （MKN） and Horowitz-Metzger equation （HM）. And their mathematical expressions of the kinetic compensation effect were also calculated.

关键词： non-isothermal kinetics thermal behavior polyoxometalate ciprofloxacin TG-DTA-DTG

The　Strategic　Problems　on　Economy　Development　in　The　Jump　Pattern　of　Economics　Suplus

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Systems Science and Systems Engineering 1995年第1期5卷 40-44页

作者： ZHOU Jianzhong(Habei Normal University,huangshi, Hubei,China,435002)WANG Huanchen(Shanghai Jiaotong University,Shanghai,China,200052)

In this paper,the strategic problems on economy development in the jump pattern of economic surplus have been *** mathermatical calculate,the authors have given out the quantitative formula on the condition that the pattern of economic surplus is a jump function,and made out the curve figure of the econmic surplus and development ***,the authors have advanced that the states of economy development can be divided into three types,and anyone of them will have many and varied possible conditions. And then,the authors have abvanced the quantitaive criterion to the three types of the states of economy development,and discussed the states. Lastly, the authors have researched the strategic problems about the three types of state of econmy development.

关键词： Economic surplus Jump pattern Strategy.

Some Rank Equalities about Combinations of Two Idempotent Matrices

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Wuhan University Journal of Natural Sciences 2010年第5期15卷 380-384页

作者： ZUO Kezheng School of Mathematics and Statistics Hubei Normal UniversityHuangshi 435002 Hubei China

The paper researches the rank of combinations a PA＋bAQ-cPAQ of two idempotent matrices P and *** the properties of the idempotent matrix and elementary block matrix operation,we get some rank equalities for combinations a PA＋bAQ-cPAQ of two idempotent matrices P and *** rank equalities generalize the results of Koliha J J,Rakoevi V and Tian Y,and give some applications of the rank equalities.

关键词： idempotent matrix rank invertibility range null space

THE　COLOUR　REACTION　OF　CADMIUM　WITH　1-(2-BENZOTIIIAZOLYL)-3-(4-PHENYLAZOPHENYL)-TRIAZENE　AND　ITS　APPLICATION

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Chinese Chemical Letters 1995年第9期6卷 787-788页

作者： Chu Ru GONG Zhi Gang SHE Hao Xing XU Bin XU(Department of Chemistry, Hubei Normal University,huangshi 435002)

Abstract: A new triazene reagent 1-(2-benzothiazolyl)-3-(4-phenylazoghecyl )-triazece (BTPAPT) has been *** clour reaction of STPAPT with Cd (Ⅱ) has been studied. At pH=9～11,in the presence of Triton X-100,the reagent with Cd (Ⅱ) forms a complex with high sensitivity, the molar ratio of Cd (Ⅱ) to BTPAPT is 1: 2. The molar absarptlvity is 1. 4 × 10-5 L. mol-1. cm-1. Beer's law is obeyed for Cd (Ⅱ) in the range of 0-14 μg/25ml.

关键词： ITS TRIAZENE APPLICATION AND