It has been found that the bimetallic nanoclusters often have so-called core/shell structure if they are prepared by alcohol-reduction of two kinds of noble metal ions in the presence of a water-soluble polymer like poly(N-vinyl-2-pyrolidone)(PVP), and that the core/ shell structured bimetallic nanoclusters have much higher catalytic activity than the corresponding monometallic nanoclusters. He...

Inorganic nanoprobes with ultrasmall size have the advantage of kidney clearance, which was very meaningful for achieving clinical application. In this article, Mn2+-doped gold nanoclusters (Mn-AuNCs) were synthesized, by magnetic resonance imaging (MRI) and tumor-microenvironment-responsive chemodynamic therapy (CDT) photodynamic (PDT) achieved. The results showed that...

A simplified 5-RC transmission line equivalent circuit was introduced. Manganese dioxide cathodes from three commercial primary alkaline cells were investigated by means of ac impedance technique. Cathode Ohmic resistance, Faraday resistance for the reduction of MnO2, proton diffusion rate inside the lattice of EMD and electrochemical accessible surface area were obtained by numerical fitting o...

Industrial exposure to gases and fumes may produce a wide variety of respiratory damage including tracheobronchial inflammation and parenchymal damage.' Tracheobronchial inflammation is reported, particularly after exposure to chlorine, ammonia, and sulphur dioxide. Interstitial pneumonitis has been associated with the inhalation of oxides of nitrogen,2 cadmium,3 manganese,4 mercury,5 and resin...

Washed Mycoplasma organisms died rapidly when suspended in 0435 yo (w/v) NaCl prepared in laboratory ‘distilled’ water (steam condensate) at room temperature; this rapid killing was decreased by adding to the suspensions certain chelating agents, reducing agents or finely ground manganese dioxide. Washed organisms survived well in potassium phosphate (K,HPO,, 0.01 M adjusted to pH 7) dissolved ...

The proton diffusion coefficients in an electrolytic manganese dioxide (EMD) electrode at various stages of the constant current discharge have been determined by means of AC impedance technique. The finite diffusion model was applied in the numerical fitting. The crystallite size of EMD was estimated from (1 1 0), (1 2 1) and (0 2 1) diffraction peaks with both Scherrer equation and Warren–Ave...

Bisphenol A (BPA), an environmental contaminant with weak estrogenic activity, resists microbial degradation under anoxic conditions but is susceptible to abiotic transformation by manganese dioxide (MnO2). BPA degradation followed pseudo-first-order kinetics with a rate constant of 0.96 (±0.03) min(-1) in the presence of 2 mM MnO2 (0.017% w/w) at pH 7.2. 4-hydroxycumyl alcohol (HCA) was the ma...