Chromatographic study of reaction kinetics of formation and degradation of polyamido acid

1985 ◽  
Vol 34 (9) ◽  
pp. 1842-1847 ◽  
Author(s):  
V. P. Sklizkova ◽  
L. Z. Vilenchik ◽  
V. V. Kudryavtsev ◽  
T. B. Tennikova ◽  
N. G. Bel'nikevich ◽  
...  
Keyword(s):  
Reaction Kinetics ◽  
Chromatographic Study ◽  
Polyamido Acid ◽  
Kinetics Of Formation ◽  
Kinetics Of

Cinétique de la formation de la métalloporphyrine Cu(II)—dérivé tétra éthylènediamino de la protoporphyrine IX (ENP) en milieu aqueux

1979 ◽  
Vol 57 (22) ◽  
pp. 2916-2922 ◽  
Author(s):  
Guy Paquette ◽  
Miklos Zador
Keyword(s):  
New Species ◽  
Reaction Kinetics ◽  
Side Chains ◽  
Mixed Complex ◽  
Final Reaction Product ◽  
Final Reaction ◽  
Kinetics Of Formation ◽  
Degree Of Association ◽  
Kinetics Of ◽  
A New Species

The kinetics of formation of the metalloporphyrin Cu(II)–ENP is dependent on the pH due to the protonation of the pyrrol nitrogen atoms and the protonation of the diamino groups of the side chains. The degree of protonation of these side chains also influences the degree of association of the prophyrin and the metalloporphyrin in solution. The order of reaction with respect to the porphyrin is not unity, a consequence of an inhibition by the reaction product; this inhibition operates via the formation of a new species, a mixed complex of porphyrin–metalloporphyrin of low reactivity.The order of reaction with respect to Cu(II) is also not unity, a consequence of the chelation of Cu(II) by the diamino groups of the side chains. The presence of Cu(II) ligands influence both the reaction kinetics and the nature of the final reaction product. [Journal translation]

Reaction kinetics of formation of hydrochloric acid in municipal refuse incinerators

1983 ◽  
Vol 22 (1) ◽  
pp. 144-149 ◽  
Author(s):  
Shigeo Uchida ◽  
Hiroshi Kamo ◽  
Hiroshi Kubota ◽  
Ken Kanaya
Keyword(s):  
Hydrochloric Acid ◽  
Reaction Kinetics ◽  
Kinetics Of Formation ◽  
Municipal Refuse ◽  
Kinetics Of

Sintering of a Crystallizable K2O–CaO–SrO–BaO–B2O3–SiO2 Glass with Titania Present

2002 ◽  
Vol 17 (7) ◽  
pp. 1772-1778 ◽  
Author(s):  
Jau-Ho Jean ◽  
Yu-Ching Fang ◽  
Steve X. Dai ◽  
David L. Wilcox
Keyword(s):  
Activation Energy ◽  
Reaction Kinetics ◽  
Crystalline Phase ◽  
Glass Powder ◽  
Energy Analysis ◽  
Dissolution Kinetics ◽  
Critical Value ◽  
Sio2 Glass ◽  
Kinetics Of Formation ◽  
Kinetics Of

Crystallization and reaction kinetics of a crystallizable K2O–CaO–SrO–BaO–B2O3–SiO2 glass powder with 17–40 vol% titania powder were investigated. The initially amorphous K2O–CaO–SrO–BaO–B2O3–SiO2 glass powder formed cristobalite (SiO2) and pseudowollastonite [(Ca, Ba, Sr)SiO3] during firing. The above crystalline phases were completely replaced by a crystalline phase of titanite [(Ca, Sr, Ba)TiSiO5] when the amount of added titania was greater than a critical value, e.g., 10 vol%, at 99–1100 °C. A chemical reaction taking place at the interface between titania and the glass was attributed to the above observation. The dissolved titania changed the composition of the glass, and the dissolution kinetics was much faster than the formation of cristobalite and pseudowollastonite. Activation energy analysis showed that the crystallization of titanite [(Ca,Sr,Ba)TiSiO5] was controlled by a reaction-limiting kinetics of formation for the Ti–O bond.

scholarly journals Reaction kinetics and macromolecule-metal chelate complex formation in metal containing semi-interpenetrating polymer networks based on crosslinked polyurethane and linear polymethylmethacrylate

2008 ◽  
Vol 2 (4) ◽  
pp. 263-270
Author(s):  
Ludmila Kosyanchuk ◽  
◽  
Nataly Kozak ◽  
Oksana Antonenko ◽  
Yury Nizelskii ◽  
...  
Keyword(s):  
Complex Formation ◽  
Reaction Kinetics ◽  
Metal Chelate ◽  
Polymer Networks ◽  
Interpenetrating Polymer Networks ◽  
The Other ◽  
System Composition ◽  
Kinetics Of Formation ◽  
Kinetics Of ◽  
Formation Of Complexes

According to DSC and EPR data kinetics of formation of simultaneous semi-interpenetrating polymer networks based on crosslinked polyurethane and linear polymethylmethacrylate with 50:50 and 70:30 ratio obtained in the presence of 3d-metal chelates depends on type of metal. On the other hand system composition determines polyurethane or polymethylmethacrylate selection during formation of complexes with metal -diketonates.

Impact Of Synthesis Route on the Water Oxidation Kinetics of Hematite Photoanodes

2020 ◽  
Author(s):  
Camilo A. Mesa ◽  
Ludmilla Steier ◽  
Benjamin Moss ◽  
Laia Francàs ◽  
James E. Thorne ◽  
...  
Keyword(s):  
Oxygen Vacancy ◽  
Reaction Kinetics ◽  
Water Oxidation ◽  
Oxidation Kinetics ◽  
Oxidation Reaction ◽  
Charge Accumulation ◽  
Optical Signals ◽  
Current Voltage ◽  
Voltage Performance ◽  
Kinetics Of

<p><i>Operando</i> spectroelectrochemical analysis is used to determine the water oxidation reaction kinetics for hematite photoanodes prepared using four different synthetic procedures. Whilst these photoanodes exhibit very different current / voltage performance, their underlying water oxidation kinetics are found to be almost invariant. Lower photoanode performance was found to correlate with the observation of optical signals indicative of charge accumulation in mid-gap oxygen vacancy states, indicating these states do not contribute directly to water oxidation.</p>

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