Reaction of free hydroxyl radicals and oxygen with vapors of acetic acid

1963 ◽  
Vol 12 (5) ◽  
pp. 872-872
Author(s):  
I. A. Kazarnovskii ◽  
N. P. Lipikhin ◽  
S. V. Kozlov
Keyword(s):  
Acetic Acid ◽  
Hydroxyl Radicals ◽  
Free Hydroxyl

The aqueous photochemistry of sodium 9,10-anthraquinone-2-sulfonate

1976 ◽  
Vol 54 (4) ◽  
pp. 512-515 ◽  
Author(s):  
James Leslie Charlton ◽  
Rhonda Gail Smerchanski ◽  
Charles Eugene Burchill
Keyword(s):  
Hydroxyl Radicals ◽  
Free Hydroxyl

The aqueous photochemistry of sodium 9,10-anthraquinone-2-sulfonate is described and a new mechanism for the photohydroxylation is proposed. The participation of kinetically free hydroxyl radicals is ruled out.

scholarly journals Antioxidant activity of Induna apple pomace extract

2005 ◽  
pp. 239-246 ◽  
Author(s):  
Sladjana Savatovic ◽  
Sonja Djilas ◽  
Vesna Tumbas ◽  
Jasna Canadanovic-Brunet ◽  
Gordana Cetkovic
Keyword(s):  
Aqueous Solution ◽  
Antioxidant Activity ◽  
Acetic Acid ◽  
Electron Spin Resonance ◽  
Hydroxyl Radicals ◽  
Electron Spin ◽  
Esr Spectroscopy ◽  
Methanol Extract ◽  
Apple Pomace ◽  
Spin Resonance

Different concentrations ofmethanol aqueous solution with or without 0.5% acetic acid and 80% acetone were used to achieve the highest yield of extraction of phenolics from Induna apple pomace. The highest content of phenolics (6.38 mg/g) was detected in the 80% methanol extract. The influence of 80% methanol extract of Induna apple pomace on stable l,l-diphenyl-2-picrylhydrazyl (DPPH) and reactive hydroxyl radicals has been investigated by electron spin resonance (ESR) spectroscopy. Based on the obtained results it can be concluded that the investigated extract is more effective in the DPPH test than on the DMPO-OH scavenging. In both cases antioxidant activity increased with increasing concentration of the investigated extract. The high contents ofphenolics (6.38 mg/g), flavonoids (1.01 mg/g) and flavan-3-ols (0.70 mg/g) in 80% methanol extract indicated that these compounds contributed to the antioxidant activity of Induna apple pomace.

scholarly journals Identification of free hydroxyl radicals in respiring rat heart mitochondria by spin trapping with the nitrone DMPO

FEBS Letters ◽  
1981 ◽  
Vol 123 (2) ◽  
pp. 241-244 ◽  
Author(s):  
Hans Nohl ◽  
Werner Jordan ◽  
Hegner Dietmer
Keyword(s):  
Hydroxyl Radicals ◽  
Rat Heart ◽  
Spin Trapping ◽  
Heart Mitochondria ◽  
Free Hydroxyl ◽  
Rat Heart Mitochondria

Detection of Free Hydroxyl Radicals during the Oxidation of Cellulose in Air

Nature ◽  
1954 ◽  
Vol 173 (4403) ◽  
pp. 539-539
Author(s):  
R. HOLDEN
Keyword(s):  
Hydroxyl Radicals ◽  
Free Hydroxyl

Formation of free hydroxyl radicals after pentylenetetrazol-induced seizure and kindling

1999 ◽  
Vol 847 (2) ◽  
pp. 347-351 ◽  
Author(s):  
Christine Rauca ◽  
Renate Zerbe ◽  
Hannelore Jantze
Keyword(s):  
Hydroxyl Radicals ◽  
Free Hydroxyl

Fenton reagents (1:1 FeIILx/HOOH) react via [LxFeIIOOH(BH+)] (1) as hydroxylases (RH .fwdarw. ROH), not as generators of free hydroxyl radicals (HO.bul.)

1993 ◽  
Vol 115 (13) ◽  
pp. 5817-5818 ◽  
Author(s):  
Donald T. Sawyer ◽  
Chan Kang ◽  
Antoni Llobet ◽  
Chad Redman
Keyword(s):  
Hydroxyl Radicals ◽  
Fenton Reagents ◽  
Free Hydroxyl

Preparation of Zinc Phthalocyanine-Calcium Alginate Gel Beads and its Use for Photocatalytic Oxidation Decolorization of Methyl Orange

2014 ◽  
Vol 809-810 ◽  
pp. 252-257
Author(s):  
Min Hong Xu ◽  
Hai Feng Chen ◽  
Guo Xiang Pan ◽  
Pei Song Tang
Keyword(s):  
Methyl Orange ◽  
Hydroxyl Radicals ◽  
Calcium Alginate ◽  
Photocatalytic Oxidation ◽  
Water Soluble ◽  
Zinc Phthalocyanine ◽  
Alginate Gel ◽  
Gel Beads ◽  
Calcium Alginate Gel ◽  
Free Hydroxyl

A supported photocatalyst zinc phthalocyanine-calcium alginate gel beads (Zn-MPc-SA) was prepared through the mixture of water-soluble zinc phthalocyanine (Zn-MPc) and sodium alginate was drip into 5% (w/v) CaCl2 solution. The Zn-MPc-SA was characterized by IR. Methyl orange was selected as a substrate to investigate the photocatalytic activity of Zn-MPc-SA. The results shown that: the surplus of methyl orange was 22.05% at the condition of pH 3, methyl orange 10mg/L 25mL, H2O2 50μL, Zn-MPc-SA 0.1460g and visible light irradiation for 3h. Zn-MPc-SA remains efficient in repetitive test cycles with no obvious degradation of catalytic activity. The reaction mechanism was likely to involve free hydroxyl radicals.

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