On the classification and coding of linear reaction mechanisms

1980 ◽  
Vol 15 (1) ◽  
pp. 113-117 ◽  
Author(s):  
D. Bonchev ◽  
O. N. Temkin ◽  
D. Kamenski
Keyword(s):  
Reaction Mechanisms ◽  
Linear Reaction

On the complexity of linear reaction mechanisms

1980 ◽  
Vol 15 (1) ◽  
pp. 119-123 ◽  
Author(s):  
D. Bonchev ◽  
O. N. Temkin ◽  
D. Kamenski
Keyword(s):  
Reaction Mechanisms ◽  
Linear Reaction

scholarly journals Parallel and series-reaction mechanisms of wood and char combustion

2004 ◽  
Vol 8 (2) ◽  
pp. 51-64 ◽  
Author(s):  
Carmen Branca ◽  
Blasi di
Keyword(s):  
Weight Loss ◽  
Reaction Mechanisms ◽  
Beech Wood ◽  
Activation Energies ◽  
Linear Reaction ◽  
Char Reactivity ◽  
Exponential Factors ◽  
Fourth Step ◽  
Parallel Reactions ◽  
Step Mechanism

Thermo gravimetric curves in air of beech wood and char, obtained from conventional pyrolysis of beech wood at a laboratory scale, have been re-examined using different kinetic models. Multi-step reaction mechanisms consisting of either four (wood) or two (char) reactions are needed for accurate predictions of weight loss curves. In the case of wood, three reactions are linear in the reactant mass fraction whereas the fourth step presents a power-law dependence. A linear reaction for devolatilization and a non-linear reaction for combustion are used for the weight loss curves of char. It has been found that activation energies and pre-exponential factors are in variant with series or parallel reactions, providing changes in the stoichiometric coefficients. Further more, the activation energies of the two reactions occurring at higher temperatures in the four-step mechanism (wood) and those of the two-step mechanism (char) are the same. Thus pre-exponential factors and reaction order take into account variations in the char reactivity derived from different pyrolysis conditions.

Enumeration, Coding, and Complexity of Linear Reaction Mechanisms

1994 ◽  
Vol 34 (2) ◽  
pp. 436-445 ◽  
Author(s):  
Ekaterina Gordeeva ◽  
Danail Bonchev ◽  
Dimitar Kamenski ◽  
Oleg N. Temkin
Keyword(s):  
Reaction Mechanisms ◽  
Linear Reaction

ChemInform Abstract: Enumeration, Coding, and Complexity of Linear Reaction Mechanisms.

ChemInform ◽  
2010 ◽  
Vol 25 (30) ◽  
pp. no-no
Author(s):  
E. GORDEEVA ◽  
D. BONCHEV ◽  
D. KAMENSKI ◽  
O. N. TEMKIN
Keyword(s):  
Reaction Mechanisms ◽  
Linear Reaction

Analyzing reactions of single mechanoenzyme molecules by light microscopy

1992 ◽  
Vol 50 (1) ◽  
pp. 426-427
Author(s):  
Jeff Gelles
Keyword(s):  
Image Processing ◽  
Reaction Mechanisms ◽  
Transient State ◽  
Nanometer Scale ◽  
Reaction Intermediates ◽  
Enzyme Molecule ◽  
Directed Movement ◽  
Enzyme Molecules ◽  
Individual Enzyme ◽  
Single Reaction

Mechanoenzymes are enzymes which use a chemical reaction to power directed movement along biological polymer. Such enzymes include the cytoskeletal motors (e.g., myosins, dyneins, and kinesins) as well as nucleic acid polymerases and helicases. A single catalytic turnover of a mechanoenzyme moves the enzyme molecule along the polymer a distance on the order of 10−9 m We have developed light microscope and digital image processing methods to detect and measure nanometer-scale motions driven by single mechanoenzyme molecules. These techniques enable one to monitor the occurrence of single reaction steps and to measure the lifetimes of reaction intermediates in individual enzyme molecules. This information can be used to elucidate reaction mechanisms and determine microscopic rate constants. Such an approach circumvents difficulties encountered in the use of traditional transient-state kinetics techniques to examine mechanoenzyme reaction mechanisms.

X-Ray Microanalysis of Nickel and Cobalt Intensified Peroxidase- Antiperoxidase For Verification of Reaction Sites

1985 ◽  
Vol 43 ◽  
pp. 468-469
Author(s):  
A. Angel ◽  
K. Miller ◽  
V. Seybold ◽  
R. Kriebel
Keyword(s):  
Reaction Mechanisms ◽  
Visual Discrimination ◽  
Osmium Tetroxide ◽  
Ultrastructural Level ◽  
Microscopic Level ◽  
Electron Microscopic Level ◽  
Electron Microscopic ◽  
X Ray ◽  
Insoluble Polymer ◽  
Cytochemical Reaction

Localization of specific substances at the ultrastructural level is dependent on the introduction of chemicals which will complex and impart an electron density at specific reaction sites. Peroxidase-antiperoxidase(PAP) methods have been successfully applied at the electron microscopic level. The PAP complex is localized by addition of its substrate, hydrogen peroxide and an electron donor, usually diaminobenzidine(DAB). On oxidation, DAB forms an insoluble polymer which is able to chelate with osmium tetroxide becoming electron dense. Since verification of reactivity is visual, discrimination of reaction product from osmiophillic structures may be difficult. Recently, x-ray microanalysis has been applied to examine cytochemical reaction precipitates, their distribution in tissues, and to study cytochemical reaction mechanisms. For example, immunoreactive sites labelled with gold have been ascertained by means of x-ray microanalysis.

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