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A mixture of benzaldehyde (1a, 1mmol), [beta]-naphthol (2, 1mmol), dimedone (3, 1 mmol) and tannic acid 10 mol % was stirred at 90[degrees]C under neat condition for 45 min (Table 4, entry-1).
The reaction mixture (1 mL) contained 250 [micro]L of 1% tannic acid (in phosphate buffer, pH 6.0), 500 [micro]L of phosphate buffer (pH 6.0) and 250 [micro]L of the culture filtrate.
Tannic Acid or Hydrolysable Tannins are naturally occurring complex phenol-rich polymers.12 They are described as heat-stable and water-soluble metabolites of plants with a molecular weight between 500 and 3000 Daltons.34 Tannic Acid is a water-soluble polyphenol containing sugar esters mainly glucose and phenol carboxylic acid such as Gallic acid hexahydroxydipenic acid or its stable dilactone ellagic acid.567 It is found in a wide variety of plants and fruits and produced from secondary metabolism of these plants.
The scientists mixed four different levels of tannic acid in peanut butter extract.
Chung wanted to see whether mixing tannic acid with major peanut allergen proteins (Ara h 1 and Ara h 2) would form stable complexes (pellets) that could prevent release of the peanut allergens in the human stomach and gut.
Chemicals such as tannic acid, gallic acid, Oxidized and reduced glutathione, hydrogen peroxide ([H.sub.2][O.sub.2]), dithionitrobenzene (DTNB), thiobarbituric acid (TBA), and adrenaline were purchased from Sigma Chemical Co.
Trisodium citrate ([C.sub.6][H.sub.5][O.sub.7][Na.sub.3][H.sub.2]O), tannic acid ([C.sub.76][H.sub.52][O.sub.46]), and hydrogen tetrachloroaurate trihydrate reagent (HAu[Cl.sub.43][H.sub.2]O) were purchased from Sigma-Aldrich.
Tannic acid has been well studied for its antioxidant, antimutagenic, and anticancarcinogenic properties [18, 19].
When the researchers add tannic acid to water, it tends to congregate around surfaces, whether pieces of polystyrene or E.
The inhibitory action of the extracts of water is due to that it contained Tannins, which include some phenolic compounds such as Gallic acid and Tannic acid, both have biological influence against many races of bacteria due to the presence of aggregates hydroxyl (-OH), which have the ability to form bonds of hydrogen between the hydroxyl group in these compounds and the water molecules in the bacterial cell and that the water (90%) of the weight which disables dynamic process in the bacterial cell [15], as these compounds (Gallic acid, Tannic acid) as they are phenolic compounds have the ability to coagulation of proteins in the bacterial cell and destroy the enzymes involved in the manufacture of the necessary amino acids to increase cell division [16].