نتایج جستجو برای: nonaqueous medium
تعداد نتایج: 237763 فیلتر نتایج به سال:
An annual increase of CO2 concentrations in the atmosphere causes global environmental problems, addressed by systematic research to develop effective technologies for capturing and utilizing carbon dioxide. Electrochemical catalytic reduction is one directions conversion into valuable chemicals fuels. The electrochemical at catalytically active electrodes aqueous solutions most studied. Howeve...
Operation of the nonaqueous Li-O2 battery critically relies on the reversible oxygen reduction/evolution reactions in the porous cathode. Carbon and polymeric binder, widely used for the construction of Li-O2 cathode, have recently been shown to decompose in the O2 environment and thus cannot sustain the desired battery reactions. Identifying stable cathode materials is thus a major current cha...
kinetic parameters of the ammonolysis reaction of dichloroethane in nonaqueous media are studied and the optimum reaction conditions are reported. a suitable reactor for running the reaction under high pressure in the range of 50 to 500 °c is designed. kinetic behaviours of the system is studied and other reaction parameters such as rate constant, kinetic order, and activation energy are determ...
The authors provide a review and literature survey of many-body effects in intermolecular forces. Topics include experimental methods, theoretical methods, many-body effects in atomic systems, and many-body effects in aqueous and nonaqueous molecular systems.
Subtilisin and alpha-chymotrypsin vigorously act as catalysts in a variety of dry organic solvents. Enzymatic transesterifications in organic solvents follow Michaelis-Menten kinetics, and the values of V/Km roughly correlate with solvent's hydrophobicity. The amount of water required by chymotrypsin and subtilisin for catalysis in organic solvents is much less than needed to form a monolayer o...
Intracellular distributions of the low molecular weight RNA species of HeLa cells were determined by a nonaqueous method of cell fractionation, in which lyophilized cells were homogenized and centrifuged in anhydrous glycerol. The nonaqueous method was used to avoid artifactual extraction of weakly bound nuclear RNA during cell fractionation. We found that the mature small RNA species K, A, C, ...
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