Kinetic study on the prooxidative effect of vitamin C on the autoxidation of glycerol trioleate in micelles

2006 ◽  
Vol 19 (2) ◽  
pp. 136-142 ◽  
Author(s):  
Zai-Qun Liu
Keyword(s):  
Vitamin C ◽  
Kinetic Study ◽  
Prooxidative Effect

scholarly journals Kinetic Study on Esterification of Ascorbyl Oleate Catalyzed by Lipase NS 88011

2020 ◽  
Vol 11 (1) ◽  
pp. 8374-8388
Keyword(s):  
Experimental Data ◽  
Ascorbic Acid ◽  
Oleic Acid ◽  
Reaction Mechanism ◽  
Vitamin C ◽  
Kinetic Study ◽  
Immobilized Enzyme ◽  
Molar Ratio ◽  
A Value ◽  
Ping Pong

In this study, bisubstrate kinetics mechanism models were correlated with the experimental data of ascorbyl oleate using the new lipase preparation, Candida antarctica NS 88011, and kinetic parameters (Vmax, Km, and Ki) were estimated. The highest conversion (49.42 %) was observed at 1 h of reaction using the ascorbic acid/oleic acid molar ratio of 1:9, 70 ºC and 30 % of enzymatic loading. The Ping Pong Bi-Bi model showed better congruence with the experimental data for all the effects evaluated. The kinetic constants showed that the lipase had an identical affinity, with a value of 0.81 for both substrates and inhibitory constant (Ki) of ascorbic acid (1.959) much higher than oleic acid (0.0008). It has been demonstrated that lipase has good operational stability (14th cycle). The results obtained with the new immobilized enzyme are valuable to elucidate the reaction mechanism. In addition, it represents an important contribution to optimize the reaction and create strategies to increase the productivity of the esters of vitamin C.

Kinetic study of the reaction of vitamin C with vitamin E radicals (tocopheroxyls) in solution

1989 ◽  
Vol 991 (2) ◽  
pp. 276-279 ◽  
Author(s):  
Kazuo Mukai ◽  
Motoi Nishimura ◽  
Kazuhiko Ishizu ◽  
Yoichi Kitamura
Keyword(s):  
Vitamin E ◽  
Vitamin C ◽  
Kinetic Study

Kinetic Study of Anthocyanins, Vitamin C, and Antioxidant Capacity in Strawberry Juices Treated by High-Intensity Pulsed Electric Fields

2008 ◽  
Vol 56 (18) ◽  
pp. 8387-8393 ◽  
Author(s):  
Isabel Odriozola-Serrano ◽  
Robert Soliva-Fortuny ◽  
Vicente Gimeno-Añó ◽  
Olga Martín-Belloso
Keyword(s):  
Vitamin C ◽  
Antioxidant Capacity ◽  
Kinetic Study ◽  
Electric Fields ◽  
High Intensity ◽  
Pulsed Electric Fields

A Kinetic Study of the Loss of Vitamin C, Color, and Firmness During Thermal Processing of Canned Peas

1981 ◽  
Vol 46 (2) ◽  
pp. 636-637 ◽  
Author(s):  
M. A. RAO ◽  
C. Y. LEE ◽  
J. KATZ ◽  
H. J. COOLEY
Keyword(s):  
Vitamin C ◽  
Kinetic Study ◽  
Thermal Processing

Stopped-Flow Kinetic Study of the Aroxyl Radical-Scavenging Action of Catechins and Vitamin C in Ethanol and Micellar Solutions

2008 ◽  
Vol 56 (12) ◽  
pp. 4406-4417 ◽  
Author(s):  
Shuji Mitani ◽  
Aya Ouchi ◽  
Emi Watanabe ◽  
Yu Kanesaki ◽  
Shin-Ichi Nagaoka ◽  
...  
Keyword(s):  
Vitamin C ◽  
Kinetic Study ◽  
Radical Scavenging ◽  
Stopped Flow ◽  
Micellar Solutions
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