In this study, the Pd/BiVO4 composite was prepared by hydrothermal method as an electrochemical sensing material for epinephrine. X-ray diffraction, scanning electron microscopy, and a transmission microscope were used to characterize samples. detection system, cyclic voltammetry differential pulse applied measure concentration of epinephrine solution (0.9–27.5 µM) with Pd/BiVO4-coated glassy c...

The development of an efficient photoanode remains the primary materials challenge in the establishment of a scalable technology for solar water splitting. The typical photoanode architecture consists of a semiconductor light absorber coated with a metal oxide that serves a combination of functions, including corrosion protection, electrocatalysis, light trapping, hole transport, and eliminatio...

Bismuth - sulphur quantum dots can be silver enhanced by autometallography (AMG). In the present study, autometallographic silver enhanced bismuth-sulphur nanocrystals were isolated from unfixed cryo-sections of kidneys and livers of rats exposed to bismuth (Bi207) subnitrate. After being subjected to AMG all the organic material was removed by sonication and enzymatic digestion and the silver ...

The plasma membrane ATPase of Neurospom cmsa, which is believed to function as an electrogenic proton pump, is extremely sensitive to inhibition by vanadium in the +5 oxidation state (vanadate). At pH 6.7 (the pH optimum of the ATPase), inhibition is half-maximal between 0.45 and 1.0 PM vanadate, depending upon the ionic composition of the reaction medium. Inhibition also depends upon pH, with ...

The present study was undertaken to test the hypothesis that the toxicity and carcinogenicity of vanadium might arise from elevation of reactive oxygen species leading to activation of the transcription factor activator protein-1 (AP-1). The AP-1 transactivation response has been implicated as causal in transformation responses to phorbol esters and growth factors. To investigate the possible a...

The bare surface of BiVO4 photoanode usually suffers from extremely low interfacial charge transfer efficiency which leads to a significantly suppressed photoelectrochemical water splitting performance. Various strategies, including modification and the loading co-catalysts, facilitate interface process in BiVO4. In this study, we demonstrate that CoS2 synthesized hydrothermal method can be use...

The interaction of vanadium in the +5 oxidation state (vanadate) with purified dog kidney Na+ and K+-stimulated adenosine trlphosphatase [(Na,K)-ATPase] has been studied using equilibrium binding, steady state kinetics, and measurements of relaxation kinetics. Vanadate binds to one high affinity site (Kl = 4 no) and one low afinity site (Kz = 0.5 pM) per enzyme molecule (Le. per ouabain binding...

It has been shown that the combination of benzylamine or tyramine and low concentrations of vanadate markedly stimulates glucose transport in rat adipocytes by a mechanism that requires semicarbazide-sensitive amine oxidase (SSAO) activity and H(2)O(2) formation. Here we have further analysed the insulin-like effects of the combination of SSAO substrates and vanadate and we have studied the sig...

The plasma membrane ATPase of Neurospom cmsa, which is believed to function as an electrogenic proton pump, is extremely sensitive to inhibition by vanadium in the +5 oxidation state (vanadate). At pH 6.7 (the pH optimum of the ATPase), inhibition is half-maximal between 0.45 and 1.0 PM vanadate, depending upon the ionic composition of the reaction medium. Inhibition also depends upon pH, with ...