Hydrolysable tannins are mixtures of polygalloyl glucoses and / or poly-galloyl quinic acid derivatives containing in between 3 up to 12 gallic acid residues per molecule.
32.
In addition, the chloroform fraction of a methanol extract of " Avrainvillea erecta " exhibited hydrogen peroxide scavenging activity as strong as that shown by gallic acid.
33.
Gallic acid, ( + )-catechin and epicatechin are the major phenolics in seeds, while ellagic acid, myricetin, quercetin, kaempferol, and trans-resveratrol are the major phenolics in the skins.
34.
Although these phytochemicals are typically mentioned as specific to " Rhodiola " extracts, there are many other constituent phenolic antioxidants, including proanthocyanidins, quercetin, gallic acid, chlorogenic acid and kaempferol.
35.
It is formed with one hexahydroxydiphenic acid unit, one modified hexahydroxydiphenic acid unit ( dehydrohexahydroxydiphenic acid or DHHDP ) and one gallic acid unit linked to a glucose molecule.
36.
The leaves also contain a range of hydroxybenzoic acids : gallic acid and its ethyl ester, gentisic acid, anthranilic acid, protocatechuic acid, and ellagic acid ( alizarine yellow ).
37.
Mango peel pigments under study include carotenoids, such as the provitamin A compound, beta-carotene, lutein and alpha-carotene, and polyphenols, such as quercetin, kaempferol, gallic acid, caffeic acid, catechins and tannins.
38.
Blackberries rank highly among fruits for in vitro antioxidant strength, particularly because of their dense content of polyphenolic compounds, such as ellagic acid, tannins, ellagitannins, quercetin, gallic acid, anthocyanins, and cyanidins.
39.
According to King and White ( 1957 ), the hydrolysable tannins and gallic acid found in the sapwood constitute the raw material for the biosynthesis of the condensed tannins found in the heartwood.
40.
Gallic acid was one of the substances used by Angelo Mai ( 1782 1854 ), among other early investigators of palimpsests, to clear the top layer of text off and reveal hidden manuscripts underneath.
