Results 31 to 40 of about 10,545 (194)
Tikrit Journal of Pure ScienceThe Hammett equation constants were calculated theoretically by statistically correlating the practical Hammett equation constants for these compounds with several theoretically calculated structural properties.
Abdullah Ramadan Ali, Faiz M. Hamid
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Temperature gradient driven heat flux closure in fluid simulations of collisionless reconnection
, 2018 Recent efforts to include kinetic effects in fluid simulations of plasmas have been very promising. Concerning collisionless magnetic reconnection, it has been found before that damping of the pressure tensor to isotropy leads to good agreement with ...
Allmann-Rahn, Florian +2 more
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Kinetics and Mechanism of Hydrolysis of Benzimidazolylcarbamates [PDF]
, 2007 Synthesis of new 2-aminobenzimidazole-1-carbamates was accomplished by carbamoylation of 2-aminobenzimidazole using different substituted phenyl chloroformates. The aqueous hydrolysis of the new compounds was examined in the pH range 1-13 at 25 oC.
Corte Real, M. +4 more
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Low Temperature Chemoselective Hydrogenation of Aldehydes over a Magnetic Pd Catalyst
Applied Sciences, 2019 Chemoselective hydrogenation of aldehydes with heterogeneous catalysts under mild conditions is of great importance but remains a major challenge. Herein, an efficient strategy was developed for low temperature chemoselective hydrogenation of aldehydes ...
Anqiu Liu +6 more
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Secondary instability of electromagnetic ion-temperature-gradient modes for zonal flow generation [PDF]
, 2011 An analytical model for zonal flow generation by toroidal ion-temperature-gradient (ITG) modes, including finite $\beta$ electromagnetic effects, is derived.
Anderson, Johan +3 more
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Molecules, 2020 The chloride-chloride exchange reaction in arenesulfonyl chlorides was investigated experimentally and theoretically by density functional theory (DFT) calculations. The second order rate constants and activation parameters of this identity reaction were
Marian Mikołajczyk +4 more
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, 2017 An important ingredient in numerical modelling of high temperature magnetised astrophysical plasmas is the anisotropic transport of heat along magnetic field lines from higher to lower temperatures.Magnetohydrodynamics (MHD) typically involves solving ...
Mignone, Andrea +4 more
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A Special Case of the Hammett Equation
Transactions of the Kansas Academy of Science (1903-), 1954 k=rate constant for a reaction of a substituted compound ko=rate constant for the reaction of the unsubstituted compound =--constant specific for the substituent p=constant specific for the reaction Hammett has shown that it is necessary to restrict the use of this equation to series of reactions in which the entrophy of activation is constant if the ...
Gilkerson, W.R. +2 more
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Chemistry – A European Journal, EarlyView.ABSTRACT Hexanuclear cyclic Gd(III) coordination compounds are promising candidates for magnetic and magnetocaloric applications, yet systematic series remain rare due to synthetic challenges. We report the synthesis and characterization of five new complexes with the general formula [Gd(H3bt)(carboxylate)]6, employing four different carboxylate ...
Ondřej František Fellner +7 more
wiley +1 more source
Fluidization of collisionless plasma turbulence
, 2018 In a collisionless, magnetized plasma, particles may stream freely along magnetic-field lines, leading to phase "mixing" of their distribution function and consequently to smoothing out of any "compressive" fluctuations (of density, pressure, etc ...
Dorland, William +3 more
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