نتایج جستجو برای: organo catalyst
تعداد نتایج: 45742 فیلتر نتایج به سال:
Organo-soluble photoresponsive azo thiol monolayer-protected gold nanorods were synthesized; the resulting gold nanorods encapsulated by thiols on their entire surface with strong covalent Au-S linkages were very stable in both organic solvents and in the solid state without aggregation or decomposition.
The alterations in serum pseudo-cholinesterase, transaminases, and aldolase observed in 12 agricultural workers exposed to the organo-phosphorus insecticide, malathion, over a period of six months are recorded. A comparison with a series of unselected controls and a series of manual workers is made. Evidence is produced that the majority of the agricultural workers have been suffering from mino...
A simple strategy avoiding the decomposition of a naked trifluoromethyl anion to difluorocarbene by a sterically very demanding organo-superbase without the help of a trifluoromethyl anion reservoir such as DMF is reported. The direct non-metallic trifluoromethylation of carbonyl compounds using fluoroform in the presence of t-Bu-P4 base afforded trifluoromethyl alcohols in high yields.
In this paper, we propose a structure for organo-mineral associations in soils based on recent insights concerning the molecular structure of soil organic matter (SOM), and on extensive published evidence from empirical studies of organo-mineral interfaces. Our conceptual model assumes that SOM consists of a heterogeneous mixture of compounds that display a range of amphiphilic or surfactant-li...
After the combustions, the phosphoric acid was, in fact, in aqueous solution, so that a correction for the heat of solution was necessary. These combustions were made in a static bomb, and as a result the concentration of phosphoric acid probably varied considerably in different parts of the bomb, leading to the comparatively large error of ±O·l per cent, associated with the heats of combustion...
Organo-osmium(II) 16-electron complexes [OsII(?6-arene)(R-PhDPEN)] (where ?6-arene = para-cymene or biphenyl) can catalyze the reduction of prochiral ketones to optically pure alcohols in presence a hydride source. Such achieve conversion pyruvate unnatural d-lactate cancer cells. To improve catalytic performance these osmium complexes, we have introduced electron-donor and electron-acceptor su...
Sodium Montmorillonite (NaMMT) has been modified via cation exchange reaction using three different organic cations. Basal spacings, interlamellar structure and thermal stability of these organo-montmorillonites (OMMT) clays have been characterized using wide angle X-ray diffraction (WAXD) and thermogravimetric analysis (TGA) techniques. Increase in the basal spacing due to organic modification...
Allen, R. J. L. (1940). Biochem. J. 34, 858. Aten, A. H. W. jun. & Hevesy, G. (1938). Nature, Lond., 142, 111. Berenblum, I. & Chain, E. (1938). Biochem. J. 32, 295. Blackwood, J. H. (1934). Biochem. J. 28, 1346. Garton, G. A. & Popjak, G. (1952). Biochem. J. 50, xVi. Graham, W. R. jun., Jones, T. S. G. & Kay, H. D. (1936). Proc. Roy. Soc. B, 120, 330. Hilditch, T. P. & Maddison, L. (1941). Bio...
A solution chemistry synthetic route yields Cs(3)C(60) with a face-centred cubic structure. The described method uses well-established Schlenk techniques and THF as a solvent. The controlled addition of an organo-metallic salt reducing agent prevents the formation of C(60)(4-) salts. The final product can be precipitated from the solution using hexane as an anti-solvent.
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