gallic acid


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a colorless crystalline acid obtained from tannin

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The total phenol and flavonoid contents of the extracts were expressed as gallic acid and quercetin equivalents (mg g-1 extract), respectively.
All the other chemicals required for antioxidant studies were purchased from HiMedia, Merck, and gallic acid was procured from Sigma.
Chemicals and reagents: 2,2-diphenyl-1-picrylhydrazyl (DPPH), Folin-Ciocalteu reagent, gallic acid, rutin, Tri-fluoroacetic acid (TFA), tri-chloroacetic acid (TCA), aluminium chloride (AlCl3) were purchased from Sigma.
The ABF extract contains phenolic compounds, in order of increasing concentration: quercetin, pcoumaric acid, gallic acid, epicatechin gallate, catechin, epicatechin and syringic acid, and has significant potential to be exploited as an antioxidant and antibacterial agent in the pharmaceutical and food industry.
The results for Total phenolic Assay were noted down by comparing them with the Gallic acid equivalent and the resultant values were recorded in the form of ug/g of Gallic acid.
The amount of total polyphenols was calculated as a gallic acid equivalent from the calibration curve of gallic acid standard solutions (covering the concentration range between 0.
Each experiment was performed in triplicates The total phenolic content was expressed in mg of Gallic acid equivalent (GAE)/g of extract.
Gallic acid is considered the primary phenolic constituent, ranging from 27% to 70% of the total phenols identified in various areas of Africa.
Quantification was carried out using the DAD-chromatograms obtained at 270 nm for gallic acid, 280 nm for caffeine, catechin, epicatechin and epigallocatechin, 327 nm for caffeic, ellagic and chlorogenic acids and 366 nm for flavonoids, by means of external standard calibration curves.
8ug/mL) Gallic acid equivalent (GAE) and aerial part of Ajuga bracteosa (178.
Contract awarded for Lee gallic acid 1 (prosperous cotton) nongro opened construction
Hydrolysis of Acacia nilotica extract, tannic and gallic acids by butanolic-hydrochloric acid yielded gallic acid which is considered to be a chemical precursor of hydrolyzable tannins.