Results 261 to 270 of about 3,531,989 (315)
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Chemical modelling of kerogens
Organic Geochemistry, 1987Abstract Models of kerogens belonging to the three classical Types have been represented at the following evolution stages: • -beginning of diagenesis (sensu-stricto), • -beginning of catagenesis, • -end of catagenesis. Chemical models are drawn, using analytical data obtained on natural samples: elemental analysis, electron ...
M. Vandenbroucke, Françoise Behar
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Chemical models of monooxygenases
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science, 19751. Employing specially selected tests, a comparison of model systems of enzymatic oxidation with known radical and oxenoid reactions indicates the inclusion of OH radicals in the reaction. 2. A model system for the low-temperature oxidation of alkanes by molecular oxygen to alcohols was found, which presumably operates by the oxenoid ...
A. A. Shteimman, N. Z. Muradov
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[Proceedings] 1992 RNNS/IEEE Symposium on Neuroinformatics and Neurocomputers, 1992
An attempt is made to design a model of intracellular chemical processes of excitability regulation based on the prediction of probable after-effects of a signal and the estimation of its biological value. While constructing the model, the author tried to take into account as much data relating to actual chemical processes in the neurons as possible ...
L.E. Tsitolovsky, Y.Z. Saakyan
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An attempt is made to design a model of intracellular chemical processes of excitability regulation based on the prediction of probable after-effects of a signal and the estimation of its biological value. While constructing the model, the author tried to take into account as much data relating to actual chemical processes in the neurons as possible ...
L.E. Tsitolovsky, Y.Z. Saakyan
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Modelling of chemical reactors
Pure and Applied Chemistry, 1965Abstract
M. G. Slin'ko, G. K. Boreskov
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Chemical models and nitrogenase
Journal of Molecular Catalysis, 1988Abstract This paper discusses four aspects of the nitrogen-fixation problem: the structure of nitrogenase; the mechanism of the function of nitrogenase; the chemistry of dinitrogen; and the function of nitrogenase at an atomic level. It is concluded that the chemistry of singly-bound end-on dinitrogen complexes supplies precedents for many of the ...
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Modelling of chemical pulp bleaching
Nordic Pulp & Paper Research Journal, 2008Conventional pulp bleaching processes consist of the following unit operations: chemical mixing, bleaching reactions (retention towers) and pulp washing. The quality and profitability of chemical pulp bleaching depends on how well one is able to utilise the physico-chemical phenomena (chemical reactions, fluid dynamics, thermodynamics, mass and heat ...
Susanna Kuitunen +8 more
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, 1997 Over centuries of development of science, it gradually became clear that our theories are unable to reflect the “physical reality” in all its complexity but can only supply models which describe certain aspects of some phenomena. The Newtonian mechanics, the Maxwellian electrodynamics, thermodynamics, statistical physics, the special and the general ...
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Chemical model for superconductivity
International Journal of Quantum Chemistry, 2002AbstractA “chemical” model based on the theory of mixed valence systems is successful in explaining a number of properties of superconductors. The model is formulated in configuration space but is consistent with Bardeen–Cooper–Schrieffer theory, and connects directly to chemical properties that may be calculated by quantum chemical methods.
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1978
The purpose of a chemical model of a lake is an accurate and concise description of the chemical processes taking place within the lake. A lake and its sediments represent an open system which interacts with its environment (that is, with the drainage basin and the atmosphere) in different ways by exchanging energy and matter.
Abraham Lerman, Dieter M. Imboden
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The purpose of a chemical model of a lake is an accurate and concise description of the chemical processes taking place within the lake. A lake and its sediments represent an open system which interacts with its environment (that is, with the drainage basin and the atmosphere) in different ways by exchanging energy and matter.
Abraham Lerman, Dieter M. Imboden
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Modeling in chemical engineering
Chemical Engineering Science, 2002Abstract In its 90 year life what has chemical engineering (ChE) contributed to society? Firstly, we have invented and developed processes to create new materials, more gently and more efficiently, so as to make life easier for all. Secondly, ChE has changed our accepted concepts and our ways of thinking in science and technology.
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