direct electron transferring of glucose oxidase was investigated   on reduced graphene and graphene oxide templates. the direct electrochemistry   glucose oxidase on   graphene showed a cyclic voltammograms corresponding to the fad/fadh 2   redox couple with an anodic, cathodic and formal potential of -430, -460 and   -445 mv, respectively in 0.1 m phosphate buffer solution and air saturated   ...

Amines inhibit photosynthetic oxygen evolution by binding to manganese in the oxygen evolving complex. This inhibition is more effective if chloride is absent. Steady-state kinetic analyses show that ammonia and chloride compete for the same site in the oxygen evolving complex; inhibition of oxygen evolution by either chloride depletion or by ammonia addition induces Signal IIr, which saturates...

Computer simulation of charge transport in GaAs resistive-gate charge-coupled devices is reported. The simulation has been performed for 10 /1-m finger spacings, doping concentrations in the range of I X 10_1 X 10 cm -3, effective channel thicknesses 0.1-1.0 ,urn, lateral applied fields 3-10 kV/cm, and charge packet sizes 5%-100% offull bucket capacity. Inhibition of charge packet broadening du...

The drug-resistant leukemic cell lines, CEM/VLBlm and K/ DAU-, are more sensitive to tumor necrosis factor a (TNFa)-mediated cytotoxicity compared with their parental cell lines, CCRF-CEM and K562 c1.6. Drugresistant leukemic cell lines have more active mitochondrial function, which is associated with a greater susceptibility to TNFa-induced respiratory inhibition. TNFa blocked electron tran...

Although photoinduced proton-coupled electron transfer (PCET) plays an essential role in photosynthesis, a full understanding of the mechanism is still lacking due to complex nonequilibrium dynamics arising from strongly coupled electronic and nuclear degrees freedom. Here we report PCET biomimetic model system investigated by means transient IR two-dimensional electronic–vibrational (2DEV) spe...

A quinone-mediated two-electron gate is shared by Photosystem II (PS II) and the photosystem of purple bacteria. In the bacterial reaction center, electron transfer from the reduced primary quinone acceptor, QA, to the secondary quinone, QB, as well as the sensitivity of this electron transfer step to inhibition by terbutryn, are regulated by the H subunit of the reaction center. Sequential rem...

EPR spectroscopy was applied to investigate the inhibition of electron transport in photosystem II by Cu2+ ions. Our results show that Cu2+ has inhibitory effects on both the donor and the acceptor side of photosystem II. In the presence of Cu2+, neither EPR signal IIvery fast nor signal IIfast, which both reflect oxidation of tyrosinez, could be induced by illumination. This shows that Cu2+ in...

1. We have investigated the effects of ethanethiol, methanethiol and dimethyl sulphide on some metabolic processes of isolated rat hepatocytes, isolated mitochondria from liver and brain and ox-heart submitochondrial particles. 2. Ethanethiol, but not dimethyl sulphide, inhibited both gluconeogenesis and ureogenesis from various substrates in rat hepatocytes, depressed cellular ATP content and ...