Combustion of Hydrocarbons - Free Radical Chain Reactions

1949 ◽  
Vol 41 (5) ◽  
pp. 893-897 ◽  
Author(s):  
P. L. Cramer ◽  
J. M. Campbell
Keyword(s):  
Free Radical ◽  
Radical Chain ◽  
Chain Reactions

scholarly journals The detection and inhibition of free radical chain reactions

1942 ◽  
Vol 180 (982) ◽  
pp. 237-256 ◽  
Keyword(s):  
Nitric Oxide ◽  
Free Radical ◽  
Chemical Analysis ◽  
Diethyl Ether ◽  
Pressure Increase ◽  
Stationary States ◽  
Decomposition Rates ◽  
Radical Chain ◽  
Chain Reactions ◽  
Limiting Values

Part I. Comparison of nitric oxide and propylene as inhibitors The reduction by propylene of the rate of pressure increase in the decomposition of propaldehyde at 550° has been shown by chemical analysis to represent a true inhibition of the reaction, and not to be due n an important degree to an induced polymerization of the propylene. With propaldehyde and with diethyl ether the limiting values to which the decomposition rates are reduced by nitric oxide and by propylene respectively are the same, although much more propylene is required to produce a given degree of inhibition. From this it is concluded that the limiting rates are more probably those of independent non-chain processes, than those characteristic of stationary states where the inhibitor starts and stops chains with equal efficiency.

scholarly journals Evidence that Criegee intermediates drive autoxidation in unsaturated lipids

2020 ◽  
Vol 117 (9) ◽  
pp. 4486-4490 ◽  
Author(s):  
Meirong Zeng ◽  
Nadja Heine ◽  
Kevin R. Wilson
Keyword(s):  
Free Radical ◽  
Radical Chain ◽  
Chain Reactions ◽  
Unsaturated Lipids ◽  
Criegee Intermediates ◽  
Age Related ◽  
Lipid Autoxidation ◽  
Free Radical Chain Reaction ◽  
Cyclic Network ◽  
Radical Chain Reaction

Autoxidation is an autocatalytic free-radical chain reaction responsible for the oxidative destruction of organic molecules in biological cells, foods, plastics, petrochemicals, fuels, and the environment. In cellular membranes, lipid autoxidation (peroxidation) is linked with oxidative stress, age-related diseases, and cancers. The established mechanism of autoxidation proceeds via H-atom abstraction through a cyclic network of peroxy–hydroperoxide-mediated free-radical chain reactions. For a series of model unsaturated lipids, we present evidence for an autoxidation mechanism, initiated by hydroxyl radical (OH) addition to C=C bonds and propagated by chain reactions involving Criegee intermediates (CIs). This mechanism leads to unexpectedly rapid autoxidation even in the presence of water, implying that as reactive intermediates, CI could play a much more prominent role in chemistries beyond the atmosphere.

Free radical chain reactions of 3-fluoro-3-iodo-β-lactams

1993 ◽  
Vol 34 (19) ◽  
pp. 3087-3090 ◽  
Author(s):  
Robert Kawecki ◽  
John T. Welch
Keyword(s):  
Free Radical ◽  
Radical Chain ◽  
Chain Reactions

Kinetics of Ionic and Free Radical Chain Reactions in Radiation Chemistry

1969 ◽  
Vol 6 (5) ◽  
pp. 466-473
Author(s):  
Donald H. Martin ◽  
Robert B. Taylor ◽  
Ffrancon Williams
Keyword(s):  
Free Radical ◽  
Radiation Chemistry ◽  
Radical Chain ◽  
Chain Reactions ◽  
Kinetics Of

Free-Radical Chain Reactions Involving Hydrogen and Bromine Atom Transfer Induced by TiO2-Mediated Photocatalysis

Langmuir ◽  
1999 ◽  
Vol 15 (4) ◽  
pp. 1141-1146 ◽  
Author(s):  
Shlomo Gershuni ◽  
Norbert Itzhak ◽  
Joseph Rabani
Keyword(s):  
Free Radical ◽  
Bromine Atom ◽  
Atom Transfer ◽  
Radical Chain ◽  
Chain Reactions

Chemical Inhibition of Ozone Degradation of SBR

1959 ◽  
Vol 32 (4) ◽  
pp. 1155-1163 ◽  
Author(s):  
H. W. Kilbourne ◽  
G. R. Wilder ◽  
J. E. Van Verth ◽  
J. O. Harris ◽  
C. C. Tung
Keyword(s):  
Free Radical ◽  
Radical Chain ◽  
Polymeric Structure ◽  
Chain Reactions ◽  
Resonance Effects ◽  
Active Structure ◽  
Active Structures ◽  
Chemical Inhibition ◽  
Ozone Resistance

Abstract The standard rubber antioxidant types which are capable of imparting ozone resistance to SBR vulcanizates are summarized. The 6-ethoxy-l,2-dihydro-2,2,4-trimethylquinoline and para phenylenediamines are shown to represent the most active structures. Steric, mesomeric, and resonance effects are shown to be important in imparting high levels of antiozone activity. When electronegative groups are substituted in an active structure, antiozone effectiveness is greatly reduced. Antiozonant activity is attributed to efficient stopping of ozone-induced free radical chain reactions in the polymeric structure.

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