Selenium-reducing microorganisms produce elemental selenium nanoparticles with particular physicochemical properties due to an associated organic fraction. This study identified high-affinity proteins associated with such bionanominerals and with nonbiogenic elemental selenium. Proteins with an anticipated functional role in selenium reduction, such as a metalloid reductase, were found to be as...

The role of selenium (Se) in human health and diseases has been discussed in detail in several recent reviews, with the main conclusion being that selenium deficiency is recognised as a global problem which urgently needs resolution. Since selenium content in plant-based food depends on its availability from soil, the level of this element in food and feeds varies among regions. In general, egg...

A biogeochemical model was developed to simulate salinity, total suspended material, phytoplankton biomass, dissolved selenium concentrations (selenite, selenate, and organic selenide), and particulate selenium concentrations (selenite + selenate, elemental selenium, and organic selenide) in the San Francisco Bay estuary. Model-generated estuarine profiles of total dissolved selenium reproduced...

The purpose of the present study was to evaluate the impact of vitamin E and selenium (Se) supplementation on the performance, egg quality and hatchability of eggs from Japanese breeding quails. The experiment was conducted over a 60 day period using 135 quails in a completely randomized design (CRD) with two levels of vitamin E and two levels of selenium (80 mg/kg of vitamin E+0.2 mg/kg organi...

the purpose of the present study was to evaluate the impact of vitamin e and selenium (se) supplementation on the performance, egg quality and hatchability of eggs from japanese breeding quails. the experiment was conducted over a 60 day period using 135 quails in a completely randomized design (crd) with two levels of vitamin e and two levels of selenium (80 mg/kg of vitamin e+0.2 mg/kg organi...

The accumulation of selenium (Se) and distribution in the sprouts of tartary buckwheat cultivated in Na2SeO3 solutions with different concentrations were investigated in this study. Total Se content, organic Se content and the proportion of organic Se were determined. The results indicated that the total Se content increased gradually while the proportion of organic selenium decreased gradually...

this experiment was conducted using 216 male chicken (ross 308) to evaluate the effects of organic selenium and sodium bicarbonate supplementation on blood parameters, growth performance and carcass characteristics in heat stress condition. birds were reared under same condition and fed with similar diets till 28 d of age. at 28 days of old, broiler with similar weight were regrouped within die...

Selenium is an important trace element with anti-cancer properties. In the present study, the apoptosis-inducing effects of organic selenium derivatives, namely methyl-L-selenocysteine and selenomethionine, were evaluated in vitro on human tumour-derived cell lines from breast, liver, colon, brain, skin and a non-tumorigenic line of epithelial origin. Apoptosis was assessed by cell-death detect...

The appearance of selenium in organic synthesis is relatively rare, and thus examples in the literature pertaining to the masking of its considerable reactivity are similarly uncommon. Greene's Protecting Groups in Organic Synthesis, the standard reference for the state of the art in this arena, offers no entries for selenium protective methodology, in stark comparison to its mention of the gre...

Two glutathione peroxidase activities have been described in rat liver. One contains selenium and is virtually absent in selenium deficiency. The other seems to be unaffected by selenium status. The selenium-dependent glutathione peroxidase utilizes H,O, and organic hydroperoxides as substrates, but the selenium-independent glutathione peroxidase is much more efficient with organic hydroperoxid...