We characterize nanostructures of Bi(2)Se(3) that are grown via metal-organic chemical vapor deposition using the precursors diethyl selenium and trimethyl bismuth. By adjusting growth parameters, we obtain either single-crystalline ribbons up to 10 μm long or thin micrometer-sized platelets. Four-terminal resistance measurements yield a sample resistivity of 4 mΩ·cm. We observe weak antilocali...

Chalcogen bonding is a little explored noncovalent interaction similar to halogen bonding. This manuscript describes the first application of selenium-based chalcogen bond donors as Lewis acids in organic synthesis. To this end, the solvolysis of benzhydryl bromide served as a halide abstraction benchmark reaction. Chalcogen bond donors based on a bis(benzimidazolium) core provided rate acceler...

BACKGROUND Selenium dependent glutathione peroxidase (GPx) reduces hydrogen peroxide (H2O2) and organic hydrogen peroxides in both normal and pathological states. Chronic dietary deficiency of selenium results in a gradual decrease in GPx and altered response to environmental stress. However, glutathione-S-transferase (GST) isozymes may increase and compensate for chronic GPx deficiency. The pa...

Abstract The supplementation of Selenium-enriched probiotics is effective in reducing oxidative stress and maintaining meat quality stability broiler chicken especially under heat stress. An experimental study was conducted to perform Comparative analysis Selenium yeast with inorganic Se broilers A total 120 chicks one day were assigned 4 groups each consisting 30 fed on same basal diet but dif...

Benthic organisms and substrates in the Great Salt Lake, Utah, were sampled during one week in June 2006 to test collection methodologies for biostromes and soft substrates and to get preliminary information on the selenium concentrations of benthic organisms. The sampling was focused on biostromes, as these solid reef-like structures cover 23% of the oxic benthic area of the lake and are the p...

an experiment was carried out to evaluate and compare the effects of organic and inorganic selenium (se) sources on broiler male birds (ross 308). uniform broiler male chicks divided in to five groups with six replicates were fed with either normal feed (without supplemental se, negative control), 0.25 ppm of inorganic se, 0.5 ppm of inorganic se, 0.25 ppm of inorganic se + 0.25 ppm of organic ...

Selenium enriched yeast is the most prevalent source of organic selenium for humans and animals. In this study, an effective capillary zone electrophoresis method was established to quantify total in biomass by measuring selenite level post incubated culture media. The detection could be achieved within 7.9 min under condition a mixture buffer 85 mM Na2HPO4 0.5 CTAB (pH 9.37), –5 kV separation ...

Abstract In recent years, the importance of nanomaterials in food science, medicine, etc. has been increasing quickly. Herein, organic and inorganic red selenium nanoparticles synthesised by reduction sodium selenite with chemical biological reducing agents. Grey hexagonal form aqueous powder was assembled at a high temperature 85 °C for 10 min. Also, enriched yogurt made that contained about 2...

Petrographic and mineralogical analyses combined with sequential extractions leaching experiments as a function of pH were performed on black clayey sediments fulfilling karsts in the Hydrogeological Experimental Site (HES) Poitiers (France) to investigate behavior arsenic selenium fractured limestone aquifer. Sequential showed that is mainly associated pyrite (about 35%) secondary iron oxyhydr...