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Electrochemical Probe of Hydroxylation of 4-Nitro-phenol by Cytochrome C with Hydrogen Peroxide

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Chemical Research in Chinese Universities 1998年第2期14卷 45-51页

作者： ZHU Yi-min WANG Jin-cheng LI Jing-hong dong shao-jun BU Feng-quan Laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022 Norma n Bethune Univer sity of Medica l Science Cha ngchun130023

BU Fengquan(Norman Bethune University of Medical Science, Changchun, 130023)(Received Dec. 2, 1996) The reaction of hydrogen peroxide with cytochrome c makes them coupled to lead to the hydroxylation of 4-nitrophenol. In situ electrochemical probe was used to detect the hydroxylation of 4-nitrophenol, which can avoid the tedious extraction procedure, the loss of the active species and the interference of some colored substances in the detection of 4-nitrocatechol by spectroscopic method. The hydroxyl radical scavengers mannitol and sodium benzoate did not eliminate hydroxylation, but the inhibitory effect of uric acid on the hydroxylation lead to the formation of the ferryl species of the protein during the reaction. These studies suggest that the electrochemical probe might efficiently detect the trace 4-nitrocatechol from the onset of the hydroxylation reaction and thus provides a more sensitive tool.

关键词： Hydrogen peroxide Hydroxylation of 4-nitrophenol Cytochrome c

Direct Electron Communication Between Glucose Oxidase and Carbon Electrode Covered with Polypyrrole

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Chemical Research in Chinese Universities 1996年第1期12卷 37-43页

作者： CHI Qi-jin and dong shao-jun(Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry,Chinese Academp of Sciences, Changchun 130022) ACAD SINICA CHANGCHUN INST APPL CHEMELECTROANALYT CHEM LABCHANGCHUN 130022PEOPLES R CHINA

Glucose oxidase can be effectively adsorbed onto the polypyrrole (PPy) thin film electrochemically formed on an anodized galssy carbon electrode (GCEa ). Direct electron communication between the redox of GOD and the modified electrode was successfully achieved, which was detected using cyclic voltammetry. GOD entrapped in PPy film still remained its biological activity and could catalyze the oxidation of glucose. As a third generation biosensor, GOD-PPy/GCEa responded linearly up to 20 mM glucose with a wider linear concentration range.

关键词： Biosensor Polypyrrole Anodization Glucose oxidase

Catalysis of dioxygen reduction at soluble polyaniline modified electrode

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Chinese Journal of Chemistry 1991年第2期9卷 116-125页

作者： JIANG,Rong-Zhong dong,shao-jun Changchun Institute of Applied Chemistry,Academia Sinica,Changchun 130022 Changchun Institute of Applied Chemistry Academia Sinica Changchun 130022

A reflux-treatment of soluble polyaniline(SPA)in dimethylformamide(DMF)containing CoCl_2 yields an active catalyst for dioxygen reduction which can be adsorbed on the electrode surface *** catalytic reduction of dioxygen at the glassy carbon(GC)electrode modified by the cata- lyst was studied with cyclic voltammetry(CV),rotating disk electrode(RDE)and rotating ring-disk electrode(RRDE).The kinetic process of dioxygen reduction at the modified electrode was analyzed with a new RRDE theory dealing with a nondiffusion-controlled process on ring *** rate constants for each scheme of dioxygen reduction were calculated,showing that only 2-electron reduction to H_2O_2 was conducted at the modified *** effect of solution acidity on the electrocatalytic behaviour for dioxygen reduction was investigated.A possibility of initiating catalytic activity for dioxygen reduction was explored with ESCA method.

关键词： Co line rate Catalysis of dioxygen reduction at soluble polyaniline modified electrode SPA

UV-Vis and Surface Photovoltage Spectra of Fe_2O_3/Polystyrene Composite Microspheres

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Chemical Research in Chinese Universities 2002年第1期18卷 75-78页

作者： QIAN Xin-ming ZHANG Xin-tong shao Hui-bo BAI Yu-bai LI Tie-jin TANG Xin-yi dong shao-jun Laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022P.R.China Department of Chemistry Jilin UniversityChangchun 130023P.R.China Department of Chemistry Capital Normal UniversityBeijing 100037P.R.China

Fe_2O_3 sol with the particle diameter of 3-5 nm was flocculated by the addition of SDS, and the flocculate formed was redispersed by the further addition of that surfactant. Thus the surfactant bilayer was formed on the surface of Fe_2O_3. The emulsion polymerization of styrene(St) adsolubilized on the surfactant adsorbed bilayer was carried out by initiator potassium persulfate(KPS). The UV-Vis and surface photovoltage spectra(SPS) indicate that the Fe_2O_3 particles were encapsulated in polystyrene(PSt) successfully.

关键词： Fe2O3 nanoparticles Encapsulation Composite microspheres

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新型凝胶聚合物电解质的合成与性能

高等学校化学学报 2005年第11期26卷 2165-2169页

作者：齐力董绍俊中国科学院长春应用化学研究所电分析化学国家重点实验室长春130022

设计并合成了丙烯腈-甲基丙烯酸甲酯-甲基丙烯酸聚乙二醇单甲醚酯共聚物及其梳状凝胶聚合物电解质.表征结果表明,合成的产物结构与设计的结果一致.该梳状凝胶聚合物电解质具有丙烯腈和聚氧化乙烯的优点,力学性能优良,室温电导率可达到10... 详细信息

设计并合成了丙烯腈-甲基丙烯酸甲酯-甲基丙烯酸聚乙二醇单甲醚酯共聚物及其梳状凝胶聚合物电解质.表征结果表明,合成的产物结构与设计的结果一致.该梳状凝胶聚合物电解质具有丙烯腈和聚氧化乙烯的优点,力学性能优良,室温电导率可达到10-3S/cm,在锂聚合物电池领域中具有实际应用价值.

关键词：聚氧化乙烯聚合物电解质合成丙烯腈电导率

Researches on chemically modified electrode *** reduction of oxygen on iron porphyrin modified electrode

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Chinese Journal of Chemistry 1984年第2期2卷 95-104页

作者： dong shao-jun XU Li-Juan MA Yue Changchun Institute of Applied Chemistry,Academia Sinica Changchun Institute of Applied Chemistry Academia Sinica

By surface organic synthesis a Fe(Ⅲ)tetra-o-aminophenyl porphyrin modified electrodewas successfully prepared on glassy carbon electrode surface through *** preparativeconditions were investigated in *** cyclic voltammetry and semidifferential neo-polarogra-phy in an acidic aqueous solution the behavior of the catalytic reduction ofoxygen on iron porphyriamodified electrode was *** on experimental results it was shown that the irreversibleprocess of 2-electron-reduction to hydrogen peroxide belongs to EC parallel catalytic process.

关键词： TAPP Researches on chemically modified electrode V.Catalytic reduction of oxygen on iron porphyrin modified electrode

Action of Schwann Cells Implanted in Cerebral Hemorrhage Lesion

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Biomedical and Environmental Sciences 2007年第1期20卷 47-51页

作者： HONG WAN shao-dong ZHANG jun-HUA LI Beijing Neurosurgical Institute Capital Medical University Beijing 100050 China

Objective To investigate whether there is neogenesis of myelin sheath and neuron after transplantation of Schwann cells into cerebral hemorrhage lesion. Methods Schwann cells were expanded, labeled with BrdU in vitro and transplanted into rat cerebral hemorrhage with blood extracted from femoral artery and then injected into the basal nuclei. Double immunohistochemistry staining and electron microscopy were used to detect the expression of BrdU/MBP and BrdU/GAP-43 and remyelination. Results BrdU/MBP double positive cells could be seen at 1 week up to 16 weeks after transplantation of Schwann cells. Thin remyelination was observed under electron microscope. GAP-43 positive cells appeared after 12 weeks and were found more in Hippocamp. Conclusions Grafted Schwann cells participate in remyelination and promoter nerve restore in rat cerebral hemorrhage.

关键词： Schwann cell MBP GAP-43

A study of ion exchange selectivity coefficient by cyclic voltammetric measurement

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Chinese Journal of Chemistry 1991年第4期9卷 315-321页

作者： dong,shao-jun LIAN,Guo-Hua Laboratory of Electroanalytical Chemistry,Changchun Institute of Applied Chemistry,Academia Sinica,Changchun 130022 Laboratory of Electroanalytical Chemistry Changchun Institute of Applied Chemistry Academia Sinica Changchun 130022

An equation to express ion exchange selectivity coefficient was derived and used for cal- culating that of PPY film with the results obtained by cyclic voltamrnetric *** film was synthesized by electrochemical method in aqueous solution using K_4Fc(CN)_6 as supporting electrolyte, and the anions were doped into the *** exchange behaviour of doped Fe(CN)_6^(3-/4-)in the PPY film with Cl^-,NO_3^- or F^- ions in solution has been studied,and the corresponding ion exchange selec- tivity coefficients were determined.

关键词： CN A study of ion exchange selectivity coefficient by cyclic voltammetric measurement

Study of inclusion complexes of cyclodextrin by cyclic voltammetry

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Acta Chimica Sinica(English Edition) 1988年第2期6卷 116-122页

作者： dong shao-jun ZHANG dong-Bo Changchun Institute of Applied Chemistry,Academia Sinica,Changchun Department of Applied Chemistry,Chinese Science and Technology University in 1986 Changchun Institute of Applied Chemistry Academia Sinica Changchun

The inclusion complexes of a series of organometallic compound-cyclodextrin andaromatic compound-cyclodextrin have been studied by cyclic voltammetry using glassy carbon *** variations of peak potential and peak current are showed on cyclic voltammogram when the eletroac-tive guest molecules are complexed by *** constants of cyclodextrin in-clusion complexes have been calculated on the basis of this variation by both potential and *** to the magnitude of dissociation constants the relationship between the stabilityof cyclodextrin inclusion complex and the degree of matching host molecule with guest moleculehas been discussed.

关键词： NP Study of inclusion complexes of cyclodextrin by cyclic voltammetry