The activation of dihydrogen on silica, silver, and silica-supported silver (9 wt% Ag) was investigated. Both, silica and silver are individually able to dissociate dihydrogen. Silanol groups on silica undergo H→D exchange at 393 K in D2 as detected by IR spectroscopy. HD is observed in temporal analysis of products (TAP) experiments when H2 and D2 are sequentially pulsed on silver at 673 K; ev...

Catalytic oxidation of spent sulfidic caustic consist SH- ion or NaHS compound by H 2 O2 in neutral acidic solution to elemental sulphur may provide a convenient and economical method for the control sulphide wastes their associated odors at pulp, paper textile industry. Oxidation sulfide rayon waste hydrogen peroxide was investigated presence ferric sulfate catalyst. Kinetic equations activati...

Introduction: It is known that space weathering, in particular the nanophase iron (npFe) created via vapor and/or sputter deposition, has distinct and predictable effects on the optical properties of lunar soils [1,2]. In addition to the attenuation of absorption bands, weathering introduces a “characteristic continuum” which is controlled by the amount of npFe present [3]. The shape of this co...

Biohydrogen production from synthesis gas (syngas) was investigated using a local bacterium isolated from anaerobic sludge of dairy wastewater. The isolated strain Rhodopseudomonas palustris PT was able to convert syngas to hydrogen through water shift gas (WGS) reaction. The aim of present study was to determine the optimum concentration of ferric citrate which avoids the cell growth inhibitio...

Due to its unique properties, iron hematoxylin has been traditionally recommended for staining intestinal protozoa. This process can be simplified by reducing the number of steps and periods of permanence of the slides in some of the liquids used, without detriment to the quality of the results. Thus iron hematoxylin becomes adequate for routine use. Hematoxylin is a natural dye extracted from ...

A facile and eminent method has been reported for the preparation of amido alkyl naphthols. Amido naphthol derivatives were synthesized by condensation pyrazole aldehydes, β-naphthol acetamide in presence a heterogeneous SiO2 supported sodium hydrogen sulphate catalyst using acetic acid as solvent. This protocol is advantageous its shorter reaction hours, simplest workup technique, excellent yi...

The solvent free route for the synthesis of diaryl sulfoxides from arenes and thionyl chloride in the presence of Lewis acids such as aluminum chloride and ferric chloride on silica gel are described.