Selenite and selenocystamine [(CyaSe)2] efficiently activate the decomposition of H2O2 by GSH and by other thiols, as demonstrated using a leuco crystal violet POD-based H2O2 assay which is applicable (unlike other assays) also in presence of thiols. The GPx-like activities were estimated to be 3.6 and 2.7 mumol H2O2/min per mumol SeO3(2-) and (CyaSe)2, respectively. Both selenium compounds als...

zno and tio2 nanoparticles wereimpregnated with merbromin dye and used as modified photocatalysts for degradation of phenol. dye-modified zno and tio2 showed significantly higher photocatalytic activity than neat zno and tio2 under visible light illumination. moreover, the prepared dye-modified zno showed superior photocatalytic efficiency in degradation of phenol compared to the dye-modified t...

A gas-pressure cell, based on a leuco-sapphire single-crystal, serving as pressure vessel and sample holder, is presented for real time in situ studies of solid-gas hydrogenation reactions. stainless steel corpus, coated with neutron absorbing varnish, allows alignment the single-crystal holder minimizing contributions to diffraction pattern. Openings corpus enable scattering well contactless t...