hydroxyl radical


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Related to hydroxyl radical: superoxide anion, superoxide
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Noun1.hydroxyl radical - the monovalent group -OH in such compounds as bases and some acids and alcohols
chemical group, radical, group - (chemistry) two or more atoms bound together as a single unit and forming part of a molecule
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References in periodicals archive ?
When the [H.sub.2][O.sub.2] concentration is increased to 2.5 g [L.sup.-1] the performance was very similar, probably due to excess hydrogen peroxide, which can act as a hydroxyl radical scavenger (Eq.
During the experiment, the meat samples showed higher scavenging activities for the hydroxyl radicals than for other radicals indicating lower [IC.sub.50] values.
Especially, hydroxyl radical (OH*) plays important role in the decolorization of synthetic dye because it quickly cleavage double bond (-N=N-) of chromophoric group [17].
The DPPH, ABTS, and hydroxyl radical scavenging activity indicated higher contribution of lutein and zeaxanthin to the antioxidant properties of the CGM carotenoids (Table 1).
The Equation 32, shows that since hypochloride radical anion is less reactive compared to hydroxyl radical hence reaction is evidently obstructed.
The overproduction of ROS, including superoxide anion radical, hydroxyl radical, hydrogen peroxide, reactive oxygen, DPPH radicals, and nitrogen species, could result in oxidative stress, leading to the chemical modification of key cellular components, DNA instability, the membrane integrity, and decline in enzymatic activities [30].
After the specified time, the sample was immediately cooled in iced water, then centrifuged at 18000 x g (4[degrees]C) for 30 min, and subsequently evaluated for DPPH and hydroxyl radical scavenging activities.
Also, regarding the short lifetime of the produced free radicals such as sulfate radical and hydroxyl radical, which are about 4 seconds and 20 nanoseconds, respectively, they may react with PG molecules immediately after production and before reaction with intermediate compounds.
Bromate formation during ozonation of bromide-containing waters: interaction of ozone and hydroxyl radical reactions.
The ability of the extracts to scavenge hydroxyl radicals was determined by the method of Aruoma et al.(19).