Pearsall

T. P. Pearsall, ed., GalnAsP Alloy Semiconductors, John Wiley Sons, Inc., New York, 1982. 

In practice it is expensive, and therefore uneconomic, to produce a pump which operates completely free from cavitation. As a result it is usual for commercial pumps to operate in the NPSH range between inception and a point where erosion damage is unacceptable. The extent of this range may be increased by using impellers made from the more resistant materials shown in Fig. 8.77. The subject of cavitation in pumps has been dealt with extensively by Pearsall and Grist... 

Using CO-saturated hydrocarbon matrices, Pearsall and West" photolyzed sily-lene precursors at 77 K and monitored CO coordination to the silylenes by UV-vis spectroscopy (Scheme 13). Bis(trimethylsilyl)silanes 44a-c or SifiMcji were irradiated at 254 nm to create silylenes 45a-d, which reacted with CO, causing new peaks to ca. 290 and 350 nm, which were attributed to complex 46a-d, a resonance structure of silaketene 47a-d. Silylene adducts form fairly weak bonds, as seen by warming of the matrices. In the case of silylene adducts where one R = Mes, the CO dissociates and the corresponding disilene 48a-c peaks in the UV-vis spectra observed upon warming (R2 = Me most likely produced silane rings Si, Me6. etc.). 

Pearsall, Ronald. The alchemists. London Weidenfeld andNicolson, 1976. 185p. ISBN 0-297-77086-1... 

Pearsall, D. M. and D. R. Piperno (1993), Current Research in Phytolith Analysis Applications in Archaeology and Paleoecology, MASCA, Univ. Pennsylvania, Philadelphia. 

Fyarestor 100 4 Pearsall Chemical Bromochlorinated Paraffins Durable... 

Fyarestor 330 5 Pearsall Chemical Bromine-Phosphorus Compound/Water Nondurable... 

Vapour pressure investigations of the systems here under discussion have frequently been carried out (cf. Olah, 1963). However, many of these studies are concerned with the question of the composition of the complexes formed in binary or ternary systems (Van Dyke, 1950 Brown and Pearsall, 1952 Brown and Brady, 1949, 1952 Brown and Wallace, 1953a, b Lieser and Pfluger, 1960a, b). To answer this question, the vapour pressm-e diagrams were recorded as a function of the composition of the binary or ternary system. The direct evaluation of the Henry s law constant, however, also permits the basicity of the unsaturated hydrocarbons to be determined. 

This topic has a long history of research (Harrison and Aiyer, 1920 Sturgis, 1936 Pearsall and Mortimer, 1939 Shioiri, 1943 De Gee, 1950 Takai, 1952 Ponnamperuma, 1955 Baas-Becking et al., 1960 Jeffrey, 1961 Patrick, 1966 Ponnamperuma, 1972 Yu, 1985 Kyuma, 2003). The following factors result in conditions differing from those in simple aquatic systems ... 

Pearsall WH, Mortimer CH. 1939. Oxidation-reduction potentials in waterlogged soils, natural waters and muds. Journal of Ecology 27 483-501. 

Houp, K. W. Pearsall, T. E. Tebeaux, E. Dragga, S. Reporting Technical Information, 11th ed. Oxford University Press New York, 2006. 

Recent work (Brown and Pearsall, 15) has indicated that while hydrogen aluminum tetrachloride is nonexistent, interaction of aluminum chloride and hydrogen chloride does occur in the presence of substances (such as benzene and presumably, olefins) to which basic properties may be ascribed. It may be concluded that while hydrogen aluminum tetrachloride is an unstable acid, its esters are fairly stable. Further evidence in support of the hypothesis that metal halides cause the ionization of alkyl halides (the products of the addition of the hydrogen halide promoters to the olefins) is found in the fact that exchange of radioactive chlorine atoms for ordinary chlorine atoms occurs when ferf-butyl chloride is treated with aluminum chloride containing radioactive chlorine atoms the hydrogen chloride which is evolved is radioactive (Fair-brother, 16). 

Brown, H. C., and Pearsall, H., Paper presented at the New York meeting of the American Chemical Society, September, 1947. 

Figure 1.30 Representation of Frenkel and Schottky defects in a crystalline solid. Adapted from W. G. Moffatt, G. W. Pearsall, and J. Wnlff, The Structure and Properties of Materials, Vol. 1. Copyright 1964 by John Wiley Sons, Inc.

Bonner, F. T., and Pearsall, K. A. (1982). Aqueous nitrosyliron(ll) chemistry. 1. Reduction of nitrite and nitric oxide by iron(ll) and (trioxodinitrato)iron(ll) in acetate buffer. Intermediacy of nitrosyl hydride. Inorg. Chem. 21, 1973-1978. 

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