the aim of this study was to provide preliminary quantitative information on selenium and iodine statusof sheep in markazi province, iran. selenium and iodine status of grazing sheep were measured for 57different flocks in 14 regions over one year. the districts were selected to represent major sheep growingareas in the province. blood samples were collected from 2 to 3-year-old ewes during sum...

It is well known that the animal organism has the ability of converting both inorganic selenium and tellurium into volatile substances which are exhaled in the respiratory gases. The nature of the volatile tellurium compound has been shown to be a methylated telluride, while the contention of Hofmeister that the exhaled selenium compound is likewise a methyl derivative (1) lacks to date adequat...

To the editor: It has been, currently, acknowledged that selenium, as a chemopreventive agent, reduces considerably the risk of prostate, colorectal, lung, breast or any other cancer. Furthermore, therapeutic application of selenium compounds for several advanced epithelial carcinomas has been tried through translational research. Although the anti-tumor mechanism of selenium was not entirely u...

A method for the quantitation of proteinaceous selenocysteine (SeCys) in Se-rich yeast was developed. The method is based on the reduction of the Se-Se and S-Se bridges with dithiotretiol, derivatization with iodoacetamide (carbamidomethylation), followed by HPLC-ICP MS. The chromatographic conditions were optimized for the total recovery of the proteinaceous selenocysteine, the minimum number ...

A method to estimate the content of selenium in organics was introduced based on reversed phase-high performance liquid chromatography (RP-HPLC).The maximum absorption peak of piazselenol was at 330 nm and the optimized temperature and pH value were 40 degrees C and 2.8, respectively. The minimum detection concentration of selenium(IV) was 0.06 microg/mL and the measurable range was 0.12-12.0 m...

Selenium hyperaccumulator Stanleya pinnata, Colorado ecotype, was supplied with water-soluble and biologically available selenate or selenite. Selenium distribution and tissue speciation were established using X-ray microscopy (micro-X-ray fluorescence and transmission X-ray microscopy) in two dimensions and three dimensions. The results indicate that S. pinnata tolerates, accumulates, and vola...

The aim of this study was to provide preliminary quantitative information on selenium and iodine statusof sheep in Markazi province, Iran. Selenium and iodine status of grazing sheep were measured for 57different flocks in 14 regions over one year. The districts were selected to represent major sheep growingareas in the province. Blood samples were collected from 2 to 3-year-old ewes during sum...

The effects of organic and inorganic sources and concentration (0 and 0.3 mg per kg of diet) of Selenium (Se) on growth performance, blood biochemical and immune system were evaluated in broiler chickens. Chickens were fed corn-soy-based diets formulated to 8 dietary treatments containing no added Se (negative control), negative control plus yeast (positive control), and 6 diets had 0.3 mg/kg o...

Basnayake, Rukma ST, Inorganic Selenium and Tellurium Speciation in Aqueous Medium of Biological Samples, Master of Science (Chemistry), December 2001, Sam Houston State University, Huntsville, Texas, 60 pp. Purpose The purpose of this research was to develop methods to study the ability of bacteria, Pseudomonas fluorescens K27 to detoxify tellurium and selenium salts by biotransformation proce...

Selenium is an integral part of the human antioxidant system. Both hemodialysis (HD) and peritoneal dialysis (PD) patients are deficient in selenium and its subsequent enzymes, compared to a healthy population. Few selenium supplementation trials have been conducted to evaluate its effect on enzymes, markers of peroxidation and clinical health outcomes in dialysis patients. Introduction Seleniu...