Bactericidal photoproducts in medium containing riboflavin plus aromatic compounds and MnCl2

1983 ◽  
Vol 29 (6) ◽  
pp. 670-675 ◽  
Author(s):  
Cesar A. Chelala ◽  
Paul Margolin
Keyword(s):  
Hydrogen Peroxide ◽  
Acetic Acid ◽  
Visible Light ◽  
Salmonella Typhimurium ◽  
Propionic Acid ◽  
Growth Medium ◽  
Aromatic Compounds ◽  
Aminobenzoic Acid ◽  
Low Concentrations ◽  
Indole 3 Acetic Acid

Exposure to visible light of growth medium containing riboflavin and indole at low concentrations created photoproducts highly toxic to Salmonella typhimurium and other bacteria. No toxicity was detected in the dark or when either of these two components was present singly. Other aromatic compounds (serotonin, indole-3-acetic acid, indole-3-propionic acid, tryptophan, tyrosine, phenylalanine, and p-aminobenzoic acid) tested in place of indole produced various degrees of toxicity. The presence of MnCl2 significantly enhanced the toxicity. Addition of catalase eliminated the toxicity, indicating an important role for hydrogen peroxide.

scholarly journals Hydrogen Peroxide in the Enzymic Oxidation of Heteroauxin

1951 ◽  
Vol 4 (3) ◽  
pp. 293 ◽  
Author(s):  
PL Goldacre
Keyword(s):  
Hydrogen Peroxide ◽  
Acetic Acid ◽  
Enzymic Oxidation ◽  
Low Concentrations ◽  
Colloidal Platinum ◽  
Indole 3 Acetic Acid

A hydrogen peroxide-peroxidase system is essential to the enzymic oxidation of indole-3-acetic acid. Catalase and colloidal platinum inhibited strongly such oxidation, and extremely low concentrations of guaiacol competed with the LA.A. for the LA.A. oxidase.

scholarly journals Hydrogen peroxide is a mediator of indole-3-acetic acid/horseradish peroxidase-induced apoptosis

FEBS Letters ◽  
2006 ◽  
Vol 580 (5) ◽  
pp. 1439-1446 ◽  
Author(s):  
Dong-Seok Kim ◽  
Sang-Eun Jeon ◽  
Yun-Mi Jeong ◽  
So-Young Kim ◽  
Sun-Bang Kwon ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Acetic Acid ◽  
Horseradish Peroxidase ◽  
Induced Apoptosis ◽  
Indole 3 Acetic Acid

Mitigation of arsenate toxicity by indole-3-acetic acid in brinjal roots: Plausible association with endogenous hydrogen peroxide

2020 ◽  
pp. 124336
Author(s):  
Saud Alamri ◽  
Manzer H. Siddiqui ◽  
Bishwajit Kumar Kushwaha ◽  
Vijay Pratap Singh ◽  
Hayssam M. Ali
Keyword(s):  
Hydrogen Peroxide ◽  
Acetic Acid ◽  
Indole 3 Acetic Acid

Elevated indole-3-acetic acid peroxidase activity is involved in the cadmium-induced hydrogen peroxide production in barley root tip

2010 ◽  
Vol 62 (1) ◽  
pp. 59-64 ◽  
Author(s):  
L’ubica Halušková ◽  
Katarína Valentovičová ◽  
Jana Huttová ◽  
Igor Mistrík ◽  
Ladislav Tamás
Keyword(s):  
Hydrogen Peroxide ◽  
Acetic Acid ◽  
Peroxidase Activity ◽  
Barley Root ◽  
Root Tip ◽  
Hydrogen Peroxide Production ◽  
Indole 3 Acetic Acid ◽  
Barley Root Tip

Oxydation peroxydative de l'acide indolyl-1 acétique par une peroxydase de Raifort. Influence du pH

1979 ◽  
Vol 57 (9) ◽  
pp. 1078-1082
Author(s):  
Annette Chappet ◽  
Martine Deschamps-Mudry ◽  
Dominique Job
Keyword(s):  
Hydrogen Peroxide ◽  
Acetic Acid ◽  
Equilibrium Constant ◽  
Indole 3 Acetic Acid ◽  
Medium Acidity

Contrary to indole-3-acetic acid, indole-1-acetic acid (I1AA) may be destroyed by horseradish isoperoxydase ‘c’ (HRPc) only in the presence of hydrogen peroxide. This peroxidative reaction depends on the enzyme and H2O2 concentrations and on the medium acidity. By calculation of the binding equilibrium constant of the HRPc–I1AA complex for different pH, it appears that enzyme affinity for this substrate is higher for the more acidic tested pH.

Photo-oxidation of formic, acetic, and propionic acids with aqueous hydrogen peroxide

1981 ◽  
Vol 59 (1) ◽  
pp. 14-18 ◽  
Author(s):  
Yoshiro Ogata ◽  
Kohtaro Tomizawa ◽  
Kaoru Takagi
Keyword(s):  
Hydrogen Peroxide ◽  
Acetic Acid ◽  
Formic Acid ◽  
Propionic Acid ◽  
Aqueous Hydrogen Peroxide ◽  
Photo Oxidation ◽  
Aliphatic Acids ◽  
Tartaric Acids

Photolytic oxidation of aliphatic acids with aqueous H2O2 has been studied. Formic acid gives CO2 and H2O. Acetic acid gives products containing CO2, methane, formic, glycolic, and tartaric acids. Propionic acid gives CO2, methane, ethane, acetic, formic, lactic, β-hydroxypropionic, malonic, and glycolic acids. A mechanism involving an initial H-atom abstraction by HO•formed via photo-dissociation of H2O2 is postulated and discussed.

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