Glasses and polycrystals in the series xNa2S + (1 − x)B2S3 have been prepared and studied by magic angle spinning (MAS) NMR and by two-dimensional multiple-quantum (MQ) MAS NMR of11B and 23Na. These techniques, when applied at various magnetic fields and combined with computer simulations of the spectra, provide new insights into the structure of the polycrystalline samples. Isotropic chemical ...

This paper describes an easy and time-saving strategy for the fabrication of heterogeneous nanotubular arrays of TiO2-CdS (TCHNTAs) on transparent conductive glass (FTO) and their photoelectrochemical properties. The use of transparent FTO instead of opaque Ti substrate allows incident light from the substrate side. The anodized TiO2 nanotubular arrays were firstly detached from Ti substrate by...

The paper reports rapid mixing and relaxation experiments performed on mixtures of oxy(HbOz) and carbon monoxide (HbCO) human hemoglobin. On the (well justified) assumption that the two ligands will distribute at random between the available sites, intermediates containing different proportions of 02 and CO will be formed. In the stopped flow experiments mixtures containing different proportion...

The contributions of gasotransmitters to itch sensation are largely unknown. In this study, we aimed to investigate the roles of hydrogen sulfide (H2S), a ubiquitous gasotransmitter, in itch signaling. We found that intradermal injection of H2S donors NaHS or Na2S, but not GYY4137 (a slow-releasing H2S donor), dose-dependently induced scratching behavior in a μ-opioid receptor-dependent and his...

Z. Naturforsch. 56 b, 1257-1263 (2001); received September 11, 2001 Gold(I) Complexes, Tri(tertiary phosphine) Complexes, Thiolate Complexes Treatment of the ligand l,3,5-tris[(diphenylphosphanyl)methyl]trimethylbenzene (P3) with (tetrahydrothiophene)gold(I) chloride results in the symmetrical trigold complex [(P3)(AuC1)3]. In the presence of sodium methoxide, [(P3)(AuC1)3] reacts with thiocres...

Growth rate and concentrations of sulfates, sulfides, proteins and glucosamine were analyzed during long-term (over 60 days) incubation of Desulfotomaculum acetoxidans DSM 771. To imitate natural conditions, incubation was done in obligate anaerobic conditions in three series, without stirring or shaking. In the first 2–3 days of incubation (lag phase), only a decrease of the sulfate level occu...

Recovering Y and Eu from waste phosphors using chlorination roasting followed by a water leaching process was investigated in this study. Firstly, by chlorination roasting and water leaching, Y and Eu elements present in waste phosphors were efficiently extracted into a leach solution. Secondly, the majority of the impurities in the solution can be removed by adjusting the pH to 4.5 using a Na2...

The main objective of this study was to test the possibility that graphene-based nanomaterials can mediate environmentally relevant abiotic redox reactions of organic contaminants. We investigated the effect of graphene oxide (GO) on the reduction of nitrobenzene by Na2S in aqueous solutions. With the presence of GO (typically 5 mg/L), the observed pseudofirst-order rate constant (kobs) for the...