The chemistry of white phosphorus has generated much interest over the past decades owing to its unique tetrahedral structure and variable bonding situation. Organophosphorus compounds can be used as reagents and as ligands for innumerable complexes in catalytic processes. The reactions of transition-metal complexes with white phosphorus have been extensively studied and have resulted in a larg...

Acute static bioassays were conducted with 13 pesticides to determine their comparative toxicity to fish. There was a wide range in the toxicity of these compounds with 96-hour TLm values ranging from 0.0033 to 4.0 mg/1. Of the compounds tested, Thiodan, a chlorinated hydrocarbon, and Thimet, an organic phosphorus pesticide, were the most toxic; and Bayer 29493, an organic phosphorus compound, ...

• Interest in this laboratory has been directed toward the pathogenesis of plaque formation and general tissue change in the aortae of rabbits with induced atherosclerosis. Specifically, components of the tissue involving sulfate and phosphorus in relation to localization and chemical composition have been dealt with in some detail. In this communication, the action of the chelating agent ethyl...

• Interest in this laboratory has been directed toward the pathogenesis of plaque formation and general tissue change in the aortae of rabbits with induced atherosclerosis. Specifically, components of the tissue involving sulfate and phosphorus in relation to localization and chemical composition have been dealt with in some detail. In this communication, the action of the chelating agent ethyl...

The aims of this study were to evaluate the quantitative and qualitative chemical compound of the calcium and phosphorus ions on the carious radicular dentine surfaces resulted after lesional treatment with Carisolv system and to compare with the healthy radicular surfaces. EDX method was used for quantitative and qualitative chemical microanalysis of dentine radicular surfaces. This method als...

In this research work, we studied theoretically the structural properties of (5H-tetrazol-1-yl)(triphenylphosphine)gold or [Au(tetz)(PPh3)] by density functional theory (DFT) method at LANL2DZ level. All calculations were performed at 298.15 K and 1 atmosphere. Firstly, the bond lengths, bond angles, dihedral angles and natural charge density on atoms of the compound were calculated. The depend...

A53868A is a novel phosphorus-containing antibiotic obtained by fermentation of Streptomyces luridus NRRL15.101 ; the product has a broad-spectrum antimicrobial activity1^ The molecular formula of CnH22N3O5P(MW307) contains units of glycine, leucine, and C3H7NOSP ; mass spectral fragmentation observations and 1H NMRstudies were combined to suggest the structure 11}. However,attempts to synthesi...

Hormone level differences are generally accepted as the primary cause for sexual dimorphism in animal and human development. Levels of low molecular weight metabolites also differ between men and women in circulating amino acids, lipids and carbohydrates and within brain tissue. While investigating the metabolism of blue crab tissues using Phosphorus-31 Nuclear Magnetic Resonance, we discovered...