Myoglobin was immobilized on edge-plane pyrolytic graphite（EPG）electrodes by sodium alginate hydrogel.The protein entrapped in the sodium alginate film undergoes fast direct electron-transfer reactions with the form...Myoglobin was immobilized on edge-plane pyrolytic graphite（EPG）electrodes by sodium alginate hydrogel.The protein entrapped in the sodium alginate film undergoes fast direct electron-transfer reactions with the formal potential(Eo′)of-0.296V（vs SCE）,corresponding to FeⅢ+e-→FeⅡ,The Eo′s are linearly dependent on solution pH with the slope value of-35.0 mV/pH,indicating that the electron transfer was proton-coupled.The mechanisms for catalytic reduction of oxygen,hydrogen peroxide and nitric oxide by myoglobin entrapped in sodium alginate hydrogel were also explored.展开更多
For the method of phase transfer catalysis oxidation to synthesize benzoic acid,a series of factors were reviewed in detailed.The catalysis effect of HDTBP was found the best.The yield was 70 1%.BTEA is a good catalys...For the method of phase transfer catalysis oxidation to synthesize benzoic acid,a series of factors were reviewed in detailed.The catalysis effect of HDTBP was found the best.The yield was 70 1%.BTEA is a good catalyst and cheaper than HDTBP,and its yield was 50 5%.The fact that potassium permanganates decomposition hampered its oxidation to organic substrate was discovered,so the reaction should be done in neutral medium.展开更多
文摘Myoglobin was immobilized on edge-plane pyrolytic graphite（EPG）electrodes by sodium alginate hydrogel.The protein entrapped in the sodium alginate film undergoes fast direct electron-transfer reactions with the formal potential(Eo′)of-0.296V（vs SCE）,corresponding to FeⅢ+e-→FeⅡ,The Eo′s are linearly dependent on solution pH with the slope value of-35.0 mV/pH,indicating that the electron transfer was proton-coupled.The mechanisms for catalytic reduction of oxygen,hydrogen peroxide and nitric oxide by myoglobin entrapped in sodium alginate hydrogel were also explored.
文摘For the method of phase transfer catalysis oxidation to synthesize benzoic acid,a series of factors were reviewed in detailed.The catalysis effect of HDTBP was found the best.The yield was 70 1%.BTEA is a good catalyst and cheaper than HDTBP,and its yield was 50 5%.The fact that potassium permanganates decomposition hampered its oxidation to organic substrate was discovered,so the reaction should be done in neutral medium.
