tannic acid


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Related to tannic acid: tannin

tannic acid

[′tan·ik ′as·əd]
(organic chemistry)
C14H10O9 A yellowish powder with an astringent taste; soluble in water and alcohol, insoluble in acetone and ether; derived from nutgalls; decomposes at 210°C; used as an alcohol denaturant and a chemical intermediate, and in tanning and textiles. Also known as digallic acid; gallotannic acid; gallotannin; tannin.
C76H52O46 Yellowish-white to light-brown amorphous powder or flakes; decomposes at 210-215°C; very soluble in alcohol and acetone; used as a mordant in dyeing, in photography, as a reagent, and in clarifying wine or beer. Also known as pentadigalloylglucose.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The model reaction was first carried out in absence of catalyst in water the reaction was not gave desired product even after prolonged reaction time, then we employed different catalysts for model reaction some catalysts (Table l) can catalyze this reaction with moderate yields but we found that using tannic acid the desire product formed with higher yield that is 96% yield within 45 minutes (Table l, entry 9).
In ad- dition to growth in the oral cavity Candida albicans can ferment and/or assimilate some dietary sugars and produce organic acids in dental plaque.14 The pur- pose of the present study was to determine the effect of Tannic Acid on the growth and acid production of Candida albicans.
The samples' tannic acid levels totaled 0.25, 0.5, 1.0 and 2.0 milligrams (mg) per milliliter of peanut butter extract.
For the study, Chung mixed four different levels of tannic acid in peanut butter extract.
Furthermore, histopathology study revealed normal glomerulus and tubules with intact renal architecture in normal (Figure 3(a)), gallic (Figure 5(a)), and tannic acid (Figure 5(b)) group without cisplatin injection.
The results show that as the quantity of tannic acid is increased, first the size decreases and then reaches saturation.
Recently, reduction of metal salts by tannic acid has attracted attention of scientific community since it fulfils the requirement of a chemical reductant, but itself is a plant derived compound.
Cotrut, "Spectral characteristics and antioxidant properties of tannic acid immobilized on collagen drug-delivery systems," Revista de Chimie, vol.
Caption: Mix iron and tannic acid in water and they'll bond, forming little capsules (shown).
Figure 4 presents the percentage of remaining DPPH ([DPPH.sub.R] as a function of the concentrations of EELB, ascorbic acid and tannic acid. Ascorbic acid was selected for its common use in the food industry, and tannic acid for being reported as a metabolite present in the EELB.
Massachusetts Institute of Technology (MIT) engineers developed a nanoscale biological coating that consists of two alternating layers of thrombin, a natural clotting protein, and tannic acid, a small molecule found naturally in tea, which yields a film containing large amounts of functional thrombin.