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Mostrando ítems 11-20 de 214
A kinetic study of the reaction between boldine and singlet oxygen [O2(1Äg)]
(1997)
The sensitized photo-oxidation of boldine and its permethylated derivative, glaucine, has been studied in
several solvents using steady-state kinetic methods. Values of kB, the total rate constant for the reaction
between ...
Structural effects in the kinetic behavior of the monomer-dimer surface reaction over nondeterministic fractal surfaces
(ACADEMIC PRESS INC ELSEVIER SCIENCE, 2003-11-15)
A study is made of the segregation effect of adsorbed species related to the inner structure of two bidimensional adsorbent fractals, the incipient percolation cluster (IPC) and the backbone of the IPC, and their connection ...
Solvent effect on a model S N Ar reaction in ionic liquid/water mixtures at different compositions
(The Royal Society of Chemistry, 2018)
The reaction of phenyl 2,4,6-trinitrophenyl ether and piperidine was kinetically evaluated in BMIMBF4/water mixtures as the reaction media. This study shows the dramatic effect of the mixture composition on the reacting ...
Density functional based reactivity parameters: Thermodynamic or kinetic concepts?
(2010)
The Density Functional Theory of chemical reactivity has provided and effective way to develop a mathematical
framework for many empirical chemical concepts. In this work, the relation of some of the proposed
indexes ...
Gating kinetics of Ca++-activated K+ channels from rat muscle incorporated into planar lipid bilayers: Evidence for two voltage-dependent Ca2+ binding reactions
(1983)
The gating kinetics of a Ca2+-activated K+ channel from adult rat muscle plasma membrane are studied in artificial planar bilayers. Analysis of single-channel fluctuations distinguishes two Ca2+- and voltage-dependent ...
Complex SRO isothermal kinetics in quenched Cu-12 at.% Mn assessed by microhardness measurements
(ELSEVIER, 2006-01-15)
The isothermal kinetics of the return of short-range-order (SRO) in quenched Cu-12 at.% Mn alloy samples subsequently annealed at various temperatures was analyzed by means of microhardness measurements. An apparent ...
Solvent effects on reactions of singlet molecular oxygen, O2(1Δg), with antimalarial drugs
(2004)
Detection of O2(1Δg) emission, λmax=1270 nm, following laser excitation and steady-state methods were employed to measure total reaction rate constants, k T, for the reaction between singlet oxygen and the antimalarial ...
Development of a Kinetic Spectrophotometric Method for the Determination of Ciclopirox Olamine in Pharmaceutical Sample
(Sociedad Chilena Química, 2016)
A simple and sensitive kinetic spectrophotometric method was developed for the determination of ciclopirox olamine in pharmaceutical formulations (cream). The method is based on the oxidation of ciclopirox olamine with ...
Iso-solvation effects in mixtures of ionic liquids on the kinetics of a model SNAr reaction
(Royal Society Chemistry, 2017)
The SNAr reaction between 1-chloro-2,4-dinitrobenzene and morpholine was used as a model system to study solvation effects in a series of mixtures involving imidazolium based ionic liquids. Iso-solvation regimes (i.e. a ...
Kinetic Solvent Deuterium Isotope Effects on the Micellar-Catalyzed Hydrolysis of Trisubstituted Phosphate Esters
(1976)
Functional micelles of hexadecyl(2-hydroxyethyl)dimethylammonium bromide (I) are better catalysts than hexadecyltrimethylammonium bromide (CTABr) for the alkaline hydrolysis of diethyl and di-n-hexyl p-nitrophenyl phosphate ...