Phosphorus, effect

Previously Issleib et a/.(1866,27) had found a clear relationship of J(P-H) with the 5 character, calculated from LCAO-MO orbitals, for PHf (ca. 140 Hz 17% r), PH3 (185 Hz 18% s) and PH (550 Hz 36% i).f Other factors, however, may contribute to these couplings, some arguments have been recently proposed(1969,50) to prove the importance of the phosphorus effective charge, similar to that found for the effect of the carbon charge on 13C-H coupling. (1965,X1)... 

Auclair, J. C. 1995. Implications of increased UV-B induced photoreduction Iron(II) enrichment stimulated picocyanobacterial growth and the microbial food web in clear-water acidic Canadian Shield lakes. Canadian Journal of Fisheries and Aquatic Sciences 52 1782—1788. Auclair, J. C., P. Brassard, and P. Couture. 1985. Total dissolved phosphorus Effects of two molecular weight fractions on phosphorus cycling in natural phytoplankton communities. Water Research 19 1447—1453. 

Vitamin D is necessary to allow the body to metabolize calcium and phosphorus effectively. Independent of the formation of vitamin D, it must be emphasized that excessive uptake of UV sunlight can lead to abnormal skin cell division and the possibility of skin cancer. 

The Glow of Phosphorus—Effect of Pressure upon Oxidation of Phosphorus— Velocity of the Reaction—Effect of Temperature—Production of Ozone— Inhibition of the Glow—Nature of the Chemiluminescence—Ionisation by the Glow—The Emission Spectrum. 

The relationship between the magnitudes of Jpj (gem) and Jpj (cis and trans) coupling constants is similar to that observed in coupling constants. Jp (trans) is frequently larger than Jp (cis), but Jp (gem) can be larger than Jp (trans). The electron density on phosphorus has a pronounced effect on Jp (gem) and Jp (cis). Coordination to a transition metal markedly increases both, whereas electronegative substituents on phosphorus effect only Jp (cis) in a variable manner. The effect on Jpjj (trans) is small, but nonetheless significant. 

F. Caracciolo and J.A. Spearot, "Engine Oil Phosphorus Effects of Catalytic Converter Performance in Federal Durability and High-Speed Vehicle Tests," Society of Automotive Engineers Paper No. 770637 (June, 1977). 

Cole, C. V. and Heil, R. D. (1981). Phosphorus effects on terrestrial nitrogen cycling. Ecol. Bull. 33, 363-374. 

Interestingly, Ueda and his associates [8] found much earlier that both calcium and magnesium diminished phosphorus effects on the catalyst. (If these two types of additives were capable of forming volatiles, they might curtail adverse phosphorus effects.)... 

The presence of phosphorus effects a high char yield in the course of heating and consequently the materials have good flame retardant properties. Solutions of the polymers in V-methyl-2-pyrrolidone show a photoluminescence in the blue region [58]. 

The MINICAMS-FPD (Figure 7.5) is a prime example of how the technology has impacted on studies of CWAs. MINICAMS is the analytical instrument of choice in CWA laboratories. Given that the FPDs detect both sulfur and phosphorus effectively, the MINICAMS-FPD covers nearly all commonly tested chemical agents. 

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