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- W803428894 abstract "The Acorn (Quercus acutissima CARRUTHERS), which contains a large quantity of tannin, should be developed as a processed food as the acorn is rich in natural antioxidants and other valuable components. Accordingly, acorn extraction conditions for polyphenol and gallic acid (both antioxidants) were investigated by response surface methodology. The content of polyphenols were determined under 16 different extraction conditions based upon a central composite design. The parameters varied over of extraction temperature, 1-5 h of extraction time, and 5-25 mL/g of solvent ratio, Gallic acid extraction was optimal at extraction temperature, 1-5 h of extraction time, and 5-25 mL/g of solvent ratio, Epicatechin content was highest at , 4.16 hand 22.38 mL/g. Catechin content was highest at , 2h and 23.59 mL/g. The maximum catechin content was . Epigallocatechin content was influenced by extraction temperature and time. The maximum epigallocatechin content was at , 4.17h, and 9.25 mL/g. The maximum value of epicatechingallate content was at , 3.04h, and 24.93mL/g. Epigallocatechingallate content was influenced principally by solvent ratio and the maximum content was at , 2.96h, and 24.95mL/g. The total polyphenol content was maximal at , after extraction at , 4.24h, at 9.71mL/g. The higher the extraction temperature and the longer the extraction time, the greater the polyphenol content. Gallic acid content was highest, the maximal level was after , 1.65h at 17.17 mL/g, and this was influenced principally by extraction time and solvent ratio." @default.
- W803428894 created "2016-06-24" @default.
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- W803428894 date "2008-01-01" @default.
- W803428894 modified "2023-09-29" @default.
- W803428894 title "Optimization of Hot-Water Extraction Conditions for Preparation of Polyphenol and Gallic Acid from Acorn" @default.
- W803428894 hasPublicationYear "2008" @default.
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