Kinetic Study of Singlet-Oxygen Quenching by Caffeic Acid and Related Phenols

2009 ◽  
Vol 82 (6) ◽  
pp. 689-691 ◽  
Author(s):  
Keishi Ohara ◽  
Yoko Ichimura ◽  
Shin-ichi Nagaoka
Keyword(s):  
Singlet Oxygen ◽  
Kinetic Study ◽  
Caffeic Acid ◽  
Oxygen Quenching ◽  
Singlet Oxygen Quenching

Theoretical and kinetic study of the singlet oxygen quenching reaction by hesperidin isolated from mandarin (Citrus reticulata) fruit peels

2021 ◽  
Author(s):  
Carlos Diaz-Uribe ◽  
William Vallejo ◽  
Teylis De la Hoz ◽  
Jiress Florez ◽  
Amner Muñoz-Acevedo ◽  
...  
Keyword(s):  
Singlet Oxygen ◽  
Kinetic Study ◽  
Citrus Reticulata ◽  
Oxygen Quenching ◽  
Singlet Oxygen Quenching

Singlet oxygen quenching by trolox C in aqueous micelle solutions

2009 ◽  
Vol 97 (3) ◽  
pp. 132-137 ◽  
Author(s):  
Keishi Ohara ◽  
Kaori Kikuchi ◽  
Takashi Origuchi ◽  
Shin-ichi Nagaoka
Keyword(s):  
Singlet Oxygen ◽  
Oxygen Quenching ◽  
Singlet Oxygen Quenching ◽  
Trolox C

scholarly journals Singlet Oxygen Quenching by Phenylamides and their Parent Compounds

2007 ◽  
Vol 62 (11-12) ◽  
pp. 833-838 ◽  
Author(s):  
Violeta B. Velikova ◽  
Aglika M. Edreva ◽  
Tsonko D. Tsonev ◽  
Hamlyn G. Jones
Keyword(s):  
Singlet Oxygen ◽  
Hydroxycinnamic Acids ◽  
Oxygen Quenching ◽  
Amino Groups ◽  
Plant Metabolites ◽  
Antioxidant Defence ◽  
Enzymatic Antioxidant ◽  
Singlet Oxygen Quenching ◽  
First Time ◽  
Photosynthetic Centers

This paper demonstrates for the first time that plant metabolites of the phenylamide type, conjugates of putrescine with hydroxycinnamic acids (p-coumaric, caffeic and ferulic), possess 1O2 quenching properties. Data were obtained confirming that their acidic parent compounds were also able to quench 1O2, as did polyamines (putrescine, spermidine and spermine), and that this ability depends on the number of amino groups. Potentiation of the 1O2 quenching ability of the conjugates relative to both parent components was established. The importance of polyamines and phenylamides in the plant non-enzymatic antioxidant defence at sites of intensive 1O2 generation, such as the photosynthetic centers, was suggested.

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