A procedure for preparing carbon paste microeletrodes is described. This procedureis based on incorporation of carbon paste into the microholes at the tips ofchemically etched microdisk electrodes. The electrodes comb...A procedure for preparing carbon paste microeletrodes is described. This procedureis based on incorporation of carbon paste into the microholes at the tips ofchemically etched microdisk electrodes. The electrodes combine the advantages ofmicrodisk electrodes and carbon paste electrodes. Sigmoidal-shape voltammograms wereobserved and steady-state currents were quickly achieved on these electredes.展开更多
The semiempirical calculations were performed to discuss the effects of different substituents on the optical properties of a series of substituted benzonitriles and their corresponding oligomers. The substituents loc...The semiempirical calculations were performed to discuss the effects of different substituents on the optical properties of a series of substituted benzonitriles and their corresponding oligomers. The substituents located in para, meta and ortho-position of the benzenoid ring involve a large range of delta-pi electron-donor-acceptor capability. Theoretical analysis shows that the optical property is affected by the steric and electronic characteristics of the substituents on the benzenoid ring, moreover, the third-order polarizability regularly varies with the polymerization degrees.展开更多
Linear polybenzonitrile with carbon-nitrogen conjugated backbones was prepared by plasma polyemrization techniques The 'ultrafast Kerr effect of polymer in DMF solution was examined with femtosecond laser pulses...Linear polybenzonitrile with carbon-nitrogen conjugated backbones was prepared by plasma polyemrization techniques The 'ultrafast Kerr effect of polymer in DMF solution was examined with femtosecond laser pulses Second Order hyperpolarizability varied with polymerization degrees .展开更多
A new procedure for developing high performance enzyme electrode is described. The procedure is based on the covalently binding of horseradish peroxidase to a self-assembling monolayer on a gold electrode. An enhanced...A new procedure for developing high performance enzyme electrode is described. The procedure is based on the covalently binding of horseradish peroxidase to a self-assembling monolayer on a gold electrode. An enhanced catalytic current is observed with addition of hydrogen peroxide into phosphate buffer solution (PBS) in the presence of mediators. The electrode exhibits high sensitivity and a wide linear range to hydrogen peroxide.展开更多
METHANOL is a chemical manufactured world-wide and its production is of interest from bothindustrial and academic points of view. It is used as gasoline extenders and in the manufac-ture of methyl tetra-butyl ether wh...METHANOL is a chemical manufactured world-wide and its production is of interest from bothindustrial and academic points of view. It is used as gasoline extenders and in the manufac-ture of methyl tetra-butyl ether which is used as an octane enhancer in gasoline. The search forpotential additives has been carried out since the discovery of the promoting effect. In thisnote, we report the promoting effect of Mn on Cu-Zn-Al catalyst. The results indicated展开更多
A strategy for digital simulation methods was presented for solving partial differential equations, called as IPBFP which is to insert M points before the first time point of the usual way, to decrease simulation erro...A strategy for digital simulation methods was presented for solving partial differential equations, called as IPBFP which is to insert M points before the first time point of the usual way, to decrease simulation errors. The theoretical analysis and simulation results show that it can improve the fully implicit method with any dimensionless diffusion coefficient lambda, Crank-Nicolson method with large lambda and Saul'yev method with small lambda. The IPBFP is convenient to arrange the simulation time points flexibly and reduce calculation time and errors. This approach can combine the merits of non-uniform time grid and uniform time grid methods in simulation for electrochemical studies.展开更多
Several aspects of the application of silver electrode to the electrochemical studies of hemoglobin have been discussed in this paper. The silver electrode could not only be used directly as the electrode for the elec...Several aspects of the application of silver electrode to the electrochemical studies of hemoglobin have been discussed in this paper. The silver electrode could not only be used directly as the electrode for the electrochemical studies of hemoglobin, but also react with phenothiazine and benzimidazole to give stable and useful mediator-coated electrodes. In addition, the silver electrode could help sodium dodecyl sulfate to give full play to its promoting effect on the protein.展开更多
文摘A procedure for preparing carbon paste microeletrodes is described. This procedureis based on incorporation of carbon paste into the microholes at the tips ofchemically etched microdisk electrodes. The electrodes combine the advantages ofmicrodisk electrodes and carbon paste electrodes. Sigmoidal-shape voltammograms wereobserved and steady-state currents were quickly achieved on these electredes.
文摘The semiempirical calculations were performed to discuss the effects of different substituents on the optical properties of a series of substituted benzonitriles and their corresponding oligomers. The substituents located in para, meta and ortho-position of the benzenoid ring involve a large range of delta-pi electron-donor-acceptor capability. Theoretical analysis shows that the optical property is affected by the steric and electronic characteristics of the substituents on the benzenoid ring, moreover, the third-order polarizability regularly varies with the polymerization degrees.
文摘Linear polybenzonitrile with carbon-nitrogen conjugated backbones was prepared by plasma polyemrization techniques The 'ultrafast Kerr effect of polymer in DMF solution was examined with femtosecond laser pulses Second Order hyperpolarizability varied with polymerization degrees .
文摘A new procedure for developing high performance enzyme electrode is described. The procedure is based on the covalently binding of horseradish peroxidase to a self-assembling monolayer on a gold electrode. An enhanced catalytic current is observed with addition of hydrogen peroxide into phosphate buffer solution (PBS) in the presence of mediators. The electrode exhibits high sensitivity and a wide linear range to hydrogen peroxide.
文摘METHANOL is a chemical manufactured world-wide and its production is of interest from bothindustrial and academic points of view. It is used as gasoline extenders and in the manufac-ture of methyl tetra-butyl ether which is used as an octane enhancer in gasoline. The search forpotential additives has been carried out since the discovery of the promoting effect. In thisnote, we report the promoting effect of Mn on Cu-Zn-Al catalyst. The results indicated
基金Project supported by the National Natural Science Foundation of China.
文摘A strategy for digital simulation methods was presented for solving partial differential equations, called as IPBFP which is to insert M points before the first time point of the usual way, to decrease simulation errors. The theoretical analysis and simulation results show that it can improve the fully implicit method with any dimensionless diffusion coefficient lambda, Crank-Nicolson method with large lambda and Saul'yev method with small lambda. The IPBFP is convenient to arrange the simulation time points flexibly and reduce calculation time and errors. This approach can combine the merits of non-uniform time grid and uniform time grid methods in simulation for electrochemical studies.
基金Project supported by the National Natural Science Foundation of China.
文摘Several aspects of the application of silver electrode to the electrochemical studies of hemoglobin have been discussed in this paper. The silver electrode could not only be used directly as the electrode for the electrochemical studies of hemoglobin, but also react with phenothiazine and benzimidazole to give stable and useful mediator-coated electrodes. In addition, the silver electrode could help sodium dodecyl sulfate to give full play to its promoting effect on the protein.
