Results 301 to 310 of about 1,822,559 (326)

Evaluation of the rate constants in chemical reactions

International Journal of Chemical Kinetics, 1998
This article is concerned with the application of a new method to recover the rate constants in chemical reactions. The method is based on treating the unknown parameters as time dependent. With appropriate experimental data the unknown rate constants are guided from an arbitrary initial condition to their true value at a final time.
M. Tadi, Richard A. Yetter
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Dichlorosilylene: rate constant for reaction with oxygen

Chemical Physics Letters, 1987
Abstract Using the recently detected intense UV absorption spectrum of SiCl 2 (X 1 A 1 ) the absolute rate constant has been measured for its reaction with oxygen. The value of the bimolecular rate constant, k (SiCl 2 + O 2 ), is equal to (3.4 ± 0.7) × 10 9 M −1 s −1 at 25° C.
Otto P. Strausz, I. Safarik, T.N. Bell, A. Jodhan, V. Sandhu   +4 more
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Determination of Rate Constants for Rapid Peroxidase Reactions

Analytical Biochemistry, 1995
We describe an improved enzyme-monitored stopped-flow method for determining rate constants for peroxidase reactions that are too rapid to measure by conventional pseudo-first-order methods. Ascorbate will reduce many substrate radicals as rapidly as they are generated by a peroxidase.
Isao Yamazaki, Steven D. Aust, Thomas A. Grover, Douglas C. Goodwin   +3 more
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Rate constant for the reaction of Cl with CHCl3

International Journal of Chemical Kinetics, 1996
The rate constant for the reaction of Cl with CHCl3 was measured relative to the Cl reaction with CH4 and CH3Cl using long path FTIR. The measured rate constant at 298 K and 1 atm total pressure was (1.21 ± 0.13) × 10−13 cm3 molecule −1s−1 (2σ) about 60% larger than the currently recommended value (although within the large error bars).
Gwen D. Boone, Arlene D. Hewitt, Scott A. Hewitt, Karen M. Brahan   +3 more
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Rate Constants for the Reactions of a Series of Alkylperoxy Radicals with NO

The Journal of Physical Chemistry A, 2005
The rate constants for the gas-phase reactions of isopropyl- and tert-butylperoxy radicals with nitric oxide (NO) have been studied at 298 +/- 2 K and a total pressure of 3-4 Torr (He buffer) using a laser flash photolysis technique coupled with a time-resolved negative-ionization mass spectrometry.
Jia-Hua Xing, Akira Miyoshi
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Absolute Rate Constants for Iminyl Radical Reactions

The Journal of Organic Chemistry, 1997
The kinetics of cyclization of the 2-methyl-6,6-diphenyl-5-hexeniminyl radical (3) were measured by laser flash photolysis methods from 0 to 50 degrees C, and the kinetics of trapping of radical 3 by thiophenol and p-chlorothiophenol were determined between 4 and 83 degrees C by indirect methods using the unimolecular rate constants as the basis values.
Anne Claude Callier-Dublanchet, John H. Horner, Martin Newcomb, Béatrice Quiclet-Sire, Samir Zard, Marie Hélène Le Tadic-Biadatti   +5 more
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Rate Constants for the Reactions of Halogenated Organic Radicals

International Journal of Radiation Biology, 1988
Absolute rate constants have been measured by means of pulse radiolysis for the reactions of various halogenated aliphatic compounds (ethane derivatives, including the anaesthetics halothane, enflurane, isoflurane and methoxyflurane) with hydrated electrons and .OH radicals, the reactions of halogenated carbon-centered radicals, derived thereby, with ...
Christian Schöneich, Klaus-Dieter Asmus, Manohar Lal, Jörg Mönig   +3 more
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Reaction rate constant for the BGK model

Chemical Physics Letters, 1981
Abstract The exact rate constant is found for reaction modelled as passage over a parabolic barrier subject to solvent collisions described by the BGK model.
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Calculations of parabolic reaction rate constants

Oxidation of Metals, 1987
The oxidation kinetics of only a very limited number of pure metals or binary alloys can be described by the simplest parabolic law, Δm2=kpt, Thus for a transient period of faster kinetics, the steady state parabolic law is given by (Δm−Δmi)2 = kp(t−ti) when the initial weight gain Δmi does not contribute to steady state rate control. In such a case, a
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The Reaction Rate Constant of Chlorine Nitrate Hydrolysis

Chemistry, 2001
The first-order rate constant for the decomposition of chlorine nitrate (ClONO2) by water in a cyclic 1:3 complex at stratospheric temperatures is shown to be close to the values for the hydrolysis rate coefficient of chlorine nitrate on an ice surface determined in the laboratory.
Thomas Loerting, Klaus R. Liedl
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