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wuhan university Journal of Natural sciences 2000年第4期5卷 474-478页

作者： Dai Zhong-xu, Wang Di-hua, Zou Jin-yun, Zhou Yun-hong college of chemistry and Environmental science, wuhan university, wuhan 430072, china wuhan university College of Chemistry and Environmental Science Wuhan China (GRID:grid.49470.3e) (ISNI:***)

The behaviors ot PbSO4/Pb and PbO4/PbSO4 electrode prepared from PbCO3 have been examined using powder microelectrode(PME) technique and cyclic voltammetry(CV). Firstly, PMEs parked with Pb- CO3 transformed into PtSO4 PME in 1. 0 mol/L H2SO4 solution at 30 C, and then the PbSO4 in the PMEs were formed to Pb or PbO2 using an unsymmetrical signal(Qa/Qe for PbSO4/Pb electrode and Qe/Qa for PsO2/ PbSO4 electrode being 0. 1-0. 3) in 2. S mol/L H2SO4 solution. The results show that the CV characteristic of either PbSO4/Pb or PsO2/PbSO4 PME prepared from PhCO3 are as good as that of both electrodes made from lead oxide powder produced by ball mill.

关键词： lead carbonate powder microelectrode lead/acid battery formation

Electrochemical-Voltammetry Behavior of Several Aromatic Aldehydes in Acid Solution

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wuhan university Journal of Natural sciences 2000年第4期5卷 485-490页

作者： Zhou Xiao-rong,Li Wei-dong, Hu Jin, Zuo Zheng-zhong college of chemistry and Environmental science,wuhan university,wuhan 430072, china wuhan university College of Chemistry and Environmental Science Wuhan China (GRID:grid.49470.3e) (ISNI:***)

The electrochemical-voltammetry behavior of vanillin, heliotropin, anisaldehyde on the surface of Pt, Au electrodes in acid solution has been studied by means of the electrochemical cyclic voltammetry method. It was found that the electrochemical processes of them are irreversible on both Pt and Au electrodes. The electrochemical activity of vanillin is stronger than heliotropin's and heliotropin's is stronger than anisaldehyde's on Pt electrode. While the electrochemical activity of anisaldehyde is stronger than heliotropin's and vanillin's is the weakest on Au. The results indicate that when they are used as additives for electroplating, they must be consumptive, and it will improve the leveling ability of plating solution and brightness of the deposition layer.

关键词： Key words aromatic aldehyde acid solution electrochemical behavior cyclic voltammetry

Determination of abscisic acid based on the fluorescent quenching of quantum dots

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science china chemistry 2010年第1期53卷 245-249页

作者： ZHANG Lei,GUAN HongLiang & HE ZhiKe Key Laboratory of Analytical chemistry for Biology and Medicine,Ministry of Education college of chemistry and molecular sciences,wuhan university,wuhan 430072,china 1. Key Laboratory of Analytical chemistry for Biology and Medicine Ministry of Education college of chemistry and molecular sciences Wuhan University Wuhan 430072 China

The quenching mechanism of the fluorescence of quantum dots by abscisic acid has been systematically *** quenching constant KSV = 5.1 × 1011 / M was obtained under the optimized *** the basis of that,a very sensitive method for the determination of abscisic acid has been *** linear equation was F0/F = 0.9309 + 0.5072 C(pmol/L) and its linear range was 0.2-3.0 pmol/L with a correlation coefficient of *** limit of detection was 0.09 pmol/L.

关键词： abscisic acid quantum dots superquenching

Studies on the Inclusion Complex Reaction and Fluorescent Analytical Application of β- cyclodextrin with Hymecromone

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wuhan university Journal of Natural sciences 1999年第4期4卷 473-476页

作者： LUO Zhao fu, SONG Wei, PAN Zu ting  college of chemistry and Environmental science, wuhan university, wuhan 430072, china wuhan university College of Chemistry and Environmental Science Wuhan China (GRID:grid.49470.3e) (ISNI:***)

The inclusion complex reaction condition and the mechanism of β cyclodextrin with hymecromone have been studied by fluorescent spectrum. The fluorescent intensity and the stability of the system can be qreatly increased in qiven condition, and the formation constant of the inclusion complex reaction has been determined too. The system can be applied to the determination of trace amounts of hymecromone, the maximum fluorescent intensity is obtained with excitation and emission wavelength at 362 nm and 452 nm, respectively. The linear range for hymecromone is 8.0×10 -9 mol·L -1 to 1.0×10 -5 mol·L -1 . The detection limit is 1.8×10 -9 mol·L -1 . A simple, rapid and highly sensitive fluorimetric method is proposed for the determination of hymecromone. The results obtained are in agreement with those given by an official method.

关键词： Fluorescent spectra hymecromone β cyclodextrin inclusion complex

What we have learned from transcript profile analyses of male and female gametes in flowering plants

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science china(Life sciences) 2010年第8期53卷 927-933页

作者： XIN HaiPing & SUN MengXiang Key Laboratory of the Ministry of Education for Plant Developmental Biology, college of Life science, wuhan university, wuhan 430072, china 1. Key Laboratory of the Ministry of Education for Plant Developmental Biology College of Life Science Wuhan University Wuhan 430072 China

Double fertilization is one of the predominant features of sexual reproduction in flowering plants but, because of the physical inaccessibility of gametes, the essential molecular mechanisms in these processes are largely unknown. Based on the techniques for isolating highly purified gametes from several species and well-developed methods for manipulating RNA from limited quantities of gametes, genome-wide investigations of gamete transcription profiles were recently conducted in flowering plants. In this review, we survey the accumulated knowledge on gamete collection and purification, cDNA library construction, and transcript profile analysis to assess our understanding of the molecular mechanisms of gamete specialization and fertilization.

关键词： sperm cell egg cell fertilization cDNA library gametogenesis transcript profile

Spectrofluorimetric Method for the Determination of Triamcinolone Acetonide

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wuhan university Journal of Natural sciences 2004年第3期9卷 353-358页

作者： PanZu-ting YuJun-ping collegeofchemistryandmolecularsciences WuhanUniversityWuhan430072HubeiChina

A simple and highly sensitive method for the determination of triamcinolone acetonide in pharmaceutical formulations is presented. The approach is based on the fluorescence of production of triamcinolone acetonide oxidized by concentrated sulfuric acid. The effect of H2SO4, β-cyclodextrin (β-CD), solvent and cetyltrimethylammonium bromide (CTMAB) were discussed. And two analytical systems were established. One is CTMAB system, the linear range is 0–4.6×10?6 mol/L, and the detection limit is 3.59×10?8 mol/L. The other is β-CD and ethanol system, the linear range is 0–2.3×10?6 mol/L and the detection limit is 1.91×10?8 mol/L. The selectivity of analysis, the analytical figures of optimization, and the accuracy of the method are demonstrated with the determination of triamcinolone acetonide in pharmaceutical preparations. Key words triamcinolone acetonide - fluorimetry - CTMAB - β-cyclodextrin - pharmaceutical analysis CLC number O 657.39 Foundation item: Supported by the National Natural science Foundation of china (20275028)Biography: Pan Zu-ting (1945-), male, Professor, research direction: analytical chemistry.

关键词： triamcinolone acetonide fluorimetry CTMAB β-cyclodextrin pharmaceutical analysis

Studies of the Energy Release of Mitochondria from Sporophyte Cytoplasmic Male Sterile Rice by Differential Scanning Calorimetry

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wuhan university Journal of Natural sciences 1999年第4期4卷 498-502页

作者： ZHOU Pei jiang, LING Xing yuan, ZHOU Han tao,ZHANG Duang yang, ZHU Ying guo college of Life Seiences, wuhan university, wuhan 430072, china QU Song sheng college of chemistry and Enviromental science, wuhan university, wuhan 430072 , china wuhan university College of Life Seiences Wuhan China (GRID:grid.49470.3e) (ISNI:***) wuhan university College of Chemistry and Environmental Science Wuhan China (GRID:grid.49470.3e) (ISNI:***)

The differential scanning calorimetric (DSC)curves of the mitochondria isolated from two varieties of sporophyte cytoplasmic male sterile and their fertile lines of Yie Bai and Ma Xie type rice have been determined. The curves show that the energy is released continuously as temperature rise to 70℃. Some thermodynamic and kinetic parameters of the energy release of the mitochondria have been obtained. The presented results showed that the mitochondria from cytoplasmic male sterile rice released more heat and they had higher energy barrier, less rate, and more complicated mechanism than that of their fertile lines in the energy release process.

关键词： rice mitochondria energy release thermodynamics thermokinetics differential scanning calorimetry (DSC) cytoplasmic male sterile (CMS)

Inclusion Property and molecular Modeling of Calix[4]arene Derivatives

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wuhan university Journal of Natural sciences 1999年第4期4卷 463-468页

作者： YU Xiao dong, LIN Lin, HAN Hui ming, WU Cai ying  college of chemistry and Environmental science, wuhan university, wuhan 430072, china wuhan university College of Chemistry and Environmental Science Wuhan China (GRID:grid.49470.3e) (ISNI:***)

The inclusion properties of two calix[4]arene derivatives 5,11,17,23 tetra tert butyl 25, 27 bis (isopropyl carbamoyl methoxy) 26,28 diundecenyloxy calix[4]arene (C[4]A) and 25,27 dibutoxy 5,11,17,23 tetra tert butyl 26,28 diundecenyloxy calix[4]arene (C[4]B) were studied by gas chromatographic method. It was found that C[4]A could form inclusion complexes with benzene, toluene, methanol and ethanol while C[4]B could only form inclusion complex with methanol, which might be due to the different conformations of C[4]A and C[4]B. molecular modeling showed that CH/π and OH/π interactions played important roles in the forming of inclusion complexes.

关键词： calixarene gas chromatography molecular modeling inclusion interaction

Studies on the Interaction of DNA and Ru(1,10-phenanthroline)_2-(dipyrido[3,2-a:2′,3′-c]phenazine)^(2+)

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wuhan university Journal of Natural sciences 1999年第4期4卷 482-486页

作者： LING Lian sheng, HE Zhi ke,ZHANG Ping yi,ZENG Yun e college of chemistry and Enviromental science, wuhan university, wuhan, 430072,china

The interaction of Ru(phen) 2(dppz) 2+ (phen=1,10 phenanthroline,dppz=dipyrido[3,2 a:2′,3′ c]phenazine) and the calfthymus DNA were studied with fluorescence and ultraviolet visible absorption spectroscopy. The ultraviolet visible absorption spectrum of Ru(phen) 2(dppz) 2+ , calfthymus DNA, and their interaction demonstrated that Ru(phen) 2(dppz) 2+ intercalated into the double helix of DNA via the ligand dppz. Fe(CN) 6 4- and NaCl can not quench the fluorescence of Ru(phen) 2(dppz) 2+ DNA, which was in agreement with the intercalation mode.

关键词： Ru(phen) 2(dppz) 2+ DNA absorption spectroscopy fluorescence intercalate binding

Study on Laccase-Catalyzed Oxidation of Disubstituted Ferrocene and π-arene-π- cyclopentadienyliron Derivatives

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wuhan university Journal of Natural sciences 2000年第3期5卷 351-356页

作者： Ji Li-cai1, Hu Pei-zhi2, Jin Chang-hua3 , Ding Zi-rong2 1. college of Adult Education, wuhan university, wuhan 430072, china 2. Col lege of chemistry and Environment science, wuhan university, wuhan 430072, C hina 3,Yiping Plant of chemistry and Industry at Zhong Qing City, Zhong Qing 631323, china wuhan university College of Adult Education Wuhan China (GRID:grid.49470.3e) (ISNI:***) wuhan university College of Chemistry and Environment Science Wuhan China (GRID:grid.49470.3e) (ISNI:***) Yiping Plant of chemistry and Industry at Zhong Qing City Zhong Qing China (GRID:grid.49470.3e)

It is studied that Rhus vernicifera laccase catalyzed oxidation of 26 disubstituted ferrocene and its metal complexes, π-arene-π-cyclopentadienyliron derivatives and metal meso-(tetra-4-sulfanatophenyl)porphyrin in the diethylene glycol monobutyl ether (DGBE)/phosphate buffer (V/V, 1/5). It is found that 1,1′-bishydroxylmethyl ferrocene etc 16 compounds are new substrates of laccase. The relation of structure and function of substrates is discussed. The affective factors of laccase-catalyzed oxidation of 1,1′-bishydroxyl-methyl ferrocene—pH, temperature, substrate concentration, laccase quantity and surfactant were investigated further.

关键词： Key words Rhus vernicifera laccase disubstituted ferrocene catalytic oxidation π arene π cyclopentadienyliron