Radiation-induced formation of Co3O4 nanoparticles from Co2+(aq): probing the kinetics using radical scavengers

2015 ◽  
Vol 17 (37) ◽  
pp. 24138-24150 ◽  
Author(s):  
L. M. Alrehaily ◽  
J. M. Joseph ◽  
J. C. Wren
Keyword(s):  
Particle Formation ◽  
Co3o4 Nanoparticles ◽  
Particle Sizes ◽  
Radical Scavengers ◽  
Final Particle ◽  
Model Calculations ◽  
Γ Radiation ◽  
Nanoparticle Formation ◽  
Radiation Induced ◽  
Kinetics Of

The kinetics of γ-radiation-induced Co3O4 nanoparticle formation occurs in four distinct stages. Scavengers and [Co2+]0 affect the kinetics in different stages, and consequently influence the final particle sizes. Radiolysis model calculations on the effects of radical scavengers provide insights into their role in controlling particle formation.

Kinetics of the γ-radiation-induced polymerization of ethylene

1962 ◽  
Vol 57 (165) ◽  
pp. 867-879 ◽  
Author(s):  
Richard H. Wiley ◽  
N. T. Lipscomb ◽  
F. J. Johnston ◽  
J. E. Guillet
Keyword(s):  
Γ Radiation ◽  
Radiation Induced ◽  
Kinetics Of

Biological outcomes of γ-radiation induced DNA damages in breast and lung cancer cells pretreated with free radical scavengers

2019 ◽  
Vol 95 (3) ◽  
pp. 274-285 ◽  
Author(s):  
Vladana D. Petković ◽  
Otilija D. Keta ◽  
Marija Z. Vidosavljević ◽  
Sebastien Incerti ◽  
Aleksandra M. Ristić Fira ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Free Radical ◽  
Cancer Cells ◽  
Lung Cancer Cells ◽  
Free Radical Scavengers ◽  
Radical Scavengers ◽  
Dna Damages ◽  
Γ Radiation ◽  
Radiation Induced ◽  
Biological Outcomes

Kinetics of the γ-radiation-induced polymerization of ethylene in alkyl chlorides

1964 ◽  
Vol 2 (6) ◽  
pp. 2503-2511 ◽  
Author(s):  
Richard H. Wiley ◽  
N. T. Lipscomb ◽  
C. F. Parrish ◽  
J. E. Guillet
Keyword(s):  
Γ Radiation ◽  
Radiation Induced ◽  
Kinetics Of

Kinetics of hydrogen isotope exchange reactions - XXVIII. Steric course of radiation-induced tritium exchange between water and cyclohexane-1, 2-diols

1975 ◽  
Vol 346 (1647) ◽  
pp. 427-441 ◽  
Keyword(s):  
Hydrogen Abstraction ◽  
Tritiated Water ◽  
Organic Radical ◽  
Radical Scavengers ◽  
Exchange Reactions ◽  
Solvated Electron ◽  
Γ Irradiation ◽  
Reaction Proceeds ◽  
Radiation Induced ◽  
Kinetics Of

Under the influence of tritium β-radiation, dissolved trans -cyclohexane- 1, 2-diol exchanges carbon-bound hydrogen with the solvent (tritiated water). The exchange occurs not only at the hydroxyl-substituted (α) carbon atoms but also at non-α positions, which are, on the average, less reactive. The overall G -value for exchange in all positions is ca . 0.33. With γ-irradiation, exchange takes place with a slightly lower overall G -value. Exchange at α-positions occurs with predominant retention of con­figuration (76%). In the corresponding α-exchange of cis -cyclohexane-1, 2-diol, 79% of the reaction proceeds with inversion, i. e. the labelled products are in both reactions formed in practically the same ratio ( trans -diol: cis -diol ⋍ 3.5:1). It is concluded that the reactions go through a common intermediate (or rapidly equilibrating common set of inter­mediates), for both diols as substrates. A chemically reasonable mechanism in accordance with this requirement involves as the first step hydrogen abstraction (mainly by hydroxyl radicals) from a C—H grouping, followed by conversion of the organic radical produced to the carbanion by electron capture. The carbanion then reverts to a diol by protonation (tritonation). Equilibration of diastereomers can occur in the radical and/or in the carbanion. The involvement of both the hydroxyl radical and the solvated electron is qualitatively in accord with the action of electron and radical scavengers on the velocity of the exchange reaction.

Sign in / Sign up

Export Citation Format

Share Document