Selenium (Se) can be assimilated and volatilized via the sulfate assimilation pathway. Cystathionine-c-synthase (CGS) is thought to catalyze the synthesis of Se-cystathionine from Se-cysteine, the first step in the conversion of Se-cysteine to volatile dimethylselenide. Here the hypothesis was tested that CGS is a rate-limiting enzyme for Se volatilization. Cystathionine-c-synthase from Arabido...

This report is an evaluation of the selenium removal from agricultural drainage water and synthetic solutions contaminated with high amounts of selenium. Batch and kinetic studies were conducted on the removal of selenium and the effectiveness of various remediation materials was determined. The agricultural drainage water samples were obtained from San Joaquin Valley and provided by Department...

In fi eld experiments, tartary buckwheat and hybrid buckwheat were foliarly sprayed with an aqueous solution of sodium selenate (20 mg Se L–1). In treated plants, the selenium content was signifi cantly higher than in controls, irrespective of the plant part and taxon of buckwheat. The highest average Se concentrations in hybrid and tartary buckwheat were found in seeds. The main Se species fou...

Production of functional food with high levels selenium and other antioxidants is very valuable for human protection against different forms oxidant stress. Among leafy vegetables parsley demonstrate the highest antioxidants. Biochemical analysis fluorimetric determination revealed that foliar biofortification 4 (Petroselinum crispum) cultivars Mitsuba (Cryptotaenia japonica) sodium selenate (2...

Previously, it has been suggested that the phenotypic level of albumin in peripheral blood mononuclear cells (PBMC) decreased in streptozotocin (STZ)-induced diabetic rats. Concomitantly, the production of oxidative stresses was also elevated in the diabetic PBMC compared to that of normal control. These results suggest the close relationship between PBMC-albumin and its antioxidant roles. Here...

Three month old Thunbergia alata were exposed for 13 days to 10 μM selenite to determine the biotransformation of selenite in their roots. Selenium in formic acid extracts (80 ± 3%) was present as selenopeptides with Se-S bonds and selenium-PC complexes (selenocysteinyl-2-3-dihydroxypropionyl-glutathione, seleno-phytochelatin2, seleno-di-glutathione). An analytical method using HPLC-ICPMS to de...

Involvement of the bacterial thiopurine methyltransferase (bTPMT) in natural selenium methylation by freshwater was investigated. A freshwater environment that had no known selenium contamination but exhibited reproducible emission of dimethyl selenide (DMSe) or dimethyl diselenide (DMDSe) when it was supplemented with an organic form of selenium [(methyl)selenocysteine] or an inorganic form of...