The objective of this study was to test the hypothesis that an equine diet formulated with chelated trace minerals, organic selenium, yeast culture, direct-fed microbials (DFM) and Yucca schidigera extract would decrease excretion of nutrients that have potential for environmental impact. Horses were acclimated to 100% pelleted diets formulated with (ADD) and without (CTRL) the aforementioned a...

Determining the speciation of selenium in vivo is crucial to understanding the biological activity of this essential element, which is a popular dietary supplement due to its anti-cancer properties. Hyphenated techniques that combine separation and detection methods are traditionally and effectively used in selenium speciation analysis, but require extensive sample preparation that may affect s...

For a long period, Selenium was considered mainly a toxic element and has been the object of disputes for its controversial balance between beneficial and toxic effects. Nowadays, many evidences demonstrated its role as essential microelement in mammalian diet, having an essential role in redox homeostasis of all the living systems. Around 25 proteins were discovered to contain a selenocysteine...

Excellent crystals of (TMTSF)(2)AsF(6) (TMTSF, tetramethyltetraselenafulvalene) were employed to obtain x-ray diffraction data for a determination of the electron density distribution in this organic superconductor. Electron density was observed between molecules in a stack of donors of an organic metal and between certain interstack selenium atoms of these donors.

A. Organic Analyses 218 1. General Organic Analyses 218 2. Pesticides 219 3. PAHs and PCBs 221 4. Dioxin 222 5. VOCs 223 6. Textile Dyes 223 7. Surfactants 223 8. Disinfection Byproducts 224 9. Taste and Odor Compounds 226 10. Algal and Bacterial Toxins 226 11. Other Organic Pollutants 227 B. Inorganic Analyses 229 1. Disinfection Byproducts 229 2. Perchlorate and Dissolved Gases 230 3. Multipl...

The aim of this trial was to compare the effect of supplementation of goats with different forms of selenium on the metabolism of their kids at the time of weaning. The experiment was performed with 45 kids of mothers supplemented with various forms of selenium. Group C was control while the other four groups were supplemented with selenium for six weeks before (0.3 mg/goat/day) and after partu...

Selenium, an element long known to be toxic to living organisms (1, 2), has only recently been implicated as an essential trace element for rats (3), chicks (4,5) and several other animals. The work of Franke (6), Horn et cd. (7), Painter (8, 9), and McConnell (10, 11) established that if toxic amounts of selenium were supplied in various chemical forms to a number of plants, animals, and micro...