Kinetics of 25-hydroperoxycholesterol formation during photo-oxidation of crystalline cholesterol

2013 ◽  
Vol 94 (8) ◽  
pp. 1543-1551 ◽  
Author(s):  
Ilce Gabriela Medina-Meza ◽  
Maria Teresa Rodriguez-Estrada ◽  
Giovanni Lercker ◽  
Carlo Barnaba ◽  
Hugo Sergio García
Keyword(s):  
Photo Oxidation ◽  
Kinetics Of

Kinetics of photo-oxidation of polydienes

1978 ◽  
Vol 20 (2) ◽  
pp. 526-532 ◽  
Author(s):  
V.B. Ivanov ◽  
M.N. Kuznetsova ◽  
L.G. Angert ◽  
V.Ya. Shlyapintokh
Keyword(s):  
Photo Oxidation ◽  
Kinetics Of

scholarly journals Characteristics and Kinetics of Rosin Pentaerythritol Ester via Oxidation Process under Ultraviolet Irradiation

Molecules ◽  
2018 ◽  
Vol 23 (11) ◽  
pp. 2816 ◽  
Author(s):  
Yuanlin Li ◽  
Xiongmin Liu ◽  
Qiang Zhang ◽  
Bo Wang ◽  
Chang Yu ◽  
...  
Keyword(s):  
Light Intensity ◽  
Oxidation Kinetics ◽  
Pseudo First Order Reaction ◽  
Initial Oxidation ◽  
Photo Oxidation ◽  
Average Value ◽  
Pentaerythritol Ester ◽  
Fundamental Information ◽  
The Stability ◽  
Kinetics Of

A self-designed reaction device was used as a promising equipment to investigate the oxidation characteristics and kinetics of rosin pentaerythritol ester (RPE) under UV irradiation. Photo-oxidation kinetics and the initial quantum yield (Φ) of RPE were calculated. The initial oxidation product of the photo-oxidation reaction—peroxide was analyzed by iodimetry. The peroxide concentration is related to the light intensity (I) and the temperature (T), and the increasing T and I would destabilize the RPE by accelerating peroxide forming. Photo-oxidation of RPE follows the pseudo first-order reaction kinetics. The relationship between activation energy and logarithm of light intensity (ln I) is linear, and it is expressed as Ea = −4.937ln I + 45.565. Φ was calculated by the photo-oxidation kinetics, and the average value of Φ was 7.19% in the light intensity range of 200–800 μW cm−2. This research can provide fundamental information for application of RPE, and help obtain a better understanding of the stability of rosin esters.

Kinetics of the sulfate radical-mediated photo-oxidation of humic substances

2007 ◽  
Vol 40 (1) ◽  
pp. 19-24 ◽  
Author(s):  
Pedro M. David Gara ◽  
Gabriela N. Bosio ◽  
Mónica C. Gonzalez ◽  
Daniel O. Mártire
Keyword(s):  
Humic Substances ◽  
Sulfate Radical ◽  
Photo Oxidation ◽  
Kinetics Of

Kinetic investigations of Cl atom initiated photo-oxidation reactions of cyclic unsaturated hydrocarbons in the gas phase: an experimental and theoretical study

2017 ◽  
Vol 41 (15) ◽  
pp. 7491-7505 ◽  
Author(s):  
S. Vijayakumar ◽  
C. B. Ramya ◽  
Avinash Kumar ◽  
B. Rajakumar
Keyword(s):  
Gas Phase ◽  
Oxidation Kinetics ◽  
Theoretical Study ◽  
Oxidation Reactions ◽  
Unsaturated Hydrocarbons ◽  
Photo Oxidation ◽  
Kinetic Investigations ◽  
Kinetics Of ◽  
Cl Atom

Cl atom initiated photo oxidation kinetics of cyclohexene and cycloheptene.

BIODEGRADATION OF OIL IN THE ARCTIC: ENHANCEMENT BY OIL-SOLUBLE FERTILIZER APPLICATION

1989 ◽  
Vol 1989 (1) ◽  
pp. 439-446 ◽  
Author(s):  
Per Sveum ◽  
Alain Ladousse
Keyword(s):  
Growth Kinetics ◽  
Fertilizer Application ◽  
Oxidation Products ◽  
The Arctic ◽  
Photo Oxidation ◽  
Arctic Regions ◽  
Series Of Experiments ◽  
Soluble Fertilizer ◽  
Oil Spill Cleanup ◽  
Kinetics Of

ABSTRACT Oil exploration in arctic regions will require special oil spill cleanup methods for shorelines. The application of fertilizers to speed biodegradation of oil may hold promise. INIPOL EAP22, an oil-soluble fertilizer that is nontoxic and biodegradable, was tested in a series of experiments on Spitsbergen, Norway, to determine its effectiveness under various conditions. The fertilizer was applied to floating oil and to oil on shoreline sediments. Effectiveness of the treatments varied. The oil-on-water experiments showed virtually no signs of biodegradation, perhaps because photo-oxidation products and low-boiling-point hydrocarbons interfered. Experiments with oil in sediments showed mixed results: oil in finer sediments showed little or no biodegradation, but oil in coarser sediments was significantly biodegraded. Uptake and exchange of nutrients depends on the complex growth kinetics of the bacteria involved, and requires detailed study.

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