INTRODUCTION Forms of selenium found in soils influence its mobility, uptake, and metabolism by plants. The major forms in alkaline, oxidizing environments which are available for plant uptake are selenium-VI as selenate, Se0 4 2 -) and selenium-IV (as selenite, $e0,'). The major influences on uptake are soil pH and salinity. High salinit y and pH favor seienium anion adsorption onto clays and ...

In 1938, Moxon discovered that arsenic protected against selenium toxicity. Since that time it has been shown that this protective effect of arsenic against selenium poisoning can be demonstrated in many different animal species under a wide variety of conditions. Antagonistic effects between arsenic and selenium have also been noted in teratologic experiments. Early metabolic studies showed th...

Natural Sciences[1] Natural Sciences[1]Fish [2]Reproductive health [3]Norway [4]Forskning.no [5] Although experimented on zebrafish, the researchers believe the results are applicable to humans. It has been previously shown that selenium can protect from the toxic effects mercury (Hg) has to the nervous system. However, little is known about how they interact in reproduction. In a recently publ...

Woolfolk, C. A. (University of Washington, Seattle) and H. R. Whiteley. Reduction of inorganic compounds with molecular hydrogen by Micrococcus lactilyticus. I. Stoichiometry with compounds of arsenic, selenium, tellurium, transition and other elements. J. Bacteriol. 84:647-658. 1962.-Extracts of Micrococcus lactilyticus (Veillonella alcalescens) oxidize molecular hydrogen at the expense of cer...

Fish contain nutrients essential to the developing fetal brain, but they are contaminated with methylmercury. The Tohoku Study of Child Development, now underway in the Sanriku coastal area of Miyagi prefecture, Japan, follows mother-child pairs to examine the risks and benefits of fish consumption during pregnancy, especially the effects of prenatal exposures to methylmercury, selenium, and do...

Redox-modulating compounds derived from natural sources, such as redox active secondary metabolites, are currently of considerable interest in the field of chemoprevention, drug and phytoprotectant development. Unfortunately, the exact and occasionally even selective activity of such products, and the underlying (bio-)chemical causes thereof, are often only poorly understood. A combination of t...

Spirodiazaselenuranes are structurally interesting compounds and the stability of these compounds depends highly on the nature of the substituents attached to the nitrogen atoms. Aromatic substituents are known to play important roles in stabilizing the Se-N bonds in spiro compounds. In this study, several spirodiazaselenuranes are synthesized by introducing benzylic and aliphatic substituents ...

• Selenium?nitrogen secondary-bonding is important in relevant crystal structures. Isolated Se?N interactions are found 9% of crystals containing Se and N. Se?N(selenadiazole) occur 75% where they can form. Zero-, one-, two- three-dimensional architectures feature interactions. One-dimensional chains 45% examples. An evaluation the Cambridge Structural Database for secondary--bonding was conduc...