Results 261 to 270 of about 70,914 (313)

Kinetics of the Decomposition of a Mannich Base

Journal of Pharmaceutical Sciences, 1970
The elimination reaction of 3-(4-o-methoxyphenyl-1-piperazinyl)-4′-morpholinopropiophenone dihydrochloride (Su 17595A) was studied over the pH range of 1–10.It appears that only the unprotonated form of the Mannich base undergoes elimination in the pH range of 3–10.The observed rate constant for elimination as a function of pH corresponds well with the
J A, Mollica, J B, Smith, I M, Nunes, H K, Govan   +3 more
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A Kinetic Study of S-Nitrosothiol Decomposition

Chemistry - A European Journal, 2002
Under anaerobic conditions S-nitrosothiols 1a-e undergo thermal decomposition by homolytic cleavage of the S-N bond; the reaction leads to nitric oxide and sulfanyl radicals formed in a reversible manner. The rate constants, k(t), have been determined at different temperatures from kinetic measurements performed in refluxing alkane solvents.
Loris, Grossi, Pier Carlo, Montevecchi
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Decomposition kinetics of CaCu3Ti4O12

2008 17th IEEE International Symposium on the Applications of Ferroelectrics, 2008
Various compositions of CaCu3+xTi4+yO12 ceramics based on the cation stoichiometry (x = ?0.06, 0, +0.06; y = ?0.08, 0, +0.08) were prepared via conventional solid state method. From the XRD data, CuO phases were found on the surface layers of all non-stoichiometric CCTOs.
S. Kwon, N. Triamnak, D. P. Cann
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Kinetics of polymer decomposition

Journal of Polymer Science: Polymer Chemistry Edition, 1973
AbstractKinetic equations have been developed for polymers that decompose by the zipper mechanism. The usual assumption of steady state kinetics has not been made. Plots of the fraction decomposed α, as a function of time demonstrate a variety of patterns depending upon the relative values of the fraction k1, of chains becoming activated per second and
Joseph D. Danforth, Tsugio Takeuchi
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Kinetics of the decomposition of diazirines

Journal of the Chemical Society, Perkin Transactions 2, 1974
Thermal decomposition of a series of meta-substituted 3-chloro-3-aryldiazirines in cyclohexene has been investigated over the temperature range 60–95 °C. In contrast to the kinetics of the para-substituted compounds in cyclohexene, the rates of decomposition of this series of compounds are linearly related to their respective σ values.
Michael T. H. Liu, David H. T. Chien
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Kinetics of propellant decomposition

Journal of Chemical Technology and Biotechnology, 1979
AbstractEquations for solid‐state decompositions which are controlled by the phase‐boundary movement and nucleation have been examined using ammonium perchlorate/polystyrene propellant decomposition at 503 K and 533 K. It was found that 3 different equations governed by the nucleation process show a good fit of data at these temperatures.
Kishore, Kaushal, Kashyap, Arun K, Prasad, Ganga   +2 more
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On the kinetics of spinodal decomposition

Zeitschrift f�r Physik B Condensed Matter, 1980
We discuss the kinetics of phase separation based on the mechanism of spinodal decomposition. The starting point is Boltzmann's transport equation. A perturbation theory will be developed leading to a hierarchy of differential equations for the local density. The first member of this hierarchy is a nonlinear wave-type equation, which linearized version
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The mechanism and kinetics of decomposition of 5-aminotetrazole

Journal of Molecular Modeling, 2008
The pathway and ab initio direct kinetics of the decomposition 5-aminotetrazole (5-ATZ) to HN(3) and NH(2)CN was investigated. Reactant, products and transition state were optimized with MP2 and B3LYP methods using 6-311G** and aug-cc-pVDZ basis sets.
Jian-Guo, Zhang, Li-Na, Feng, Shao-Wen, Zhang, Tong-Lai, Zhang, Hui-Hui, Zheng   +4 more
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Decomposition kinetics in Ni-Ti alloys

Physical Review B, 1990
Etude par diffusion centrale de neutrons entre 773 et 853 K. A 853 K, l'intensite integree indique que la composition des precipites reste constante apres environ 200 mn.
, Cerri, , Schönfeld, , Kostorz
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On the kinetic decomposition voltage of ternary oxides

Physical Chemistry Chemical Physics, 2018
The theoretical and experimental kinetic decomposition voltage in a ternary oxide under electric driving force.
Jakyu Chun, Manfred Martin, Han-Ill Yoo
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