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ผลงานตีพิมพ์ในวารสารวิชาการLarge Scale Synthesis of Green Synthesized Zinc Oxide Nanoparticles from Banana Peel Extracts and Their Inhibitory Effects against Colletotrichum sp., Isolate KUFC 021, Causal Agent of Anthracnose on Dendrobium Orchidผู้แต่ง: Dr.Nattanan Panjaworayan T-Thienprasert, Associate Professor , Dr.Jiraroj T-Thienprasert, Associate Professor ,  Jittiporn Ruangtong, Thitiradsadakorn Jaithon, Pattana Srifah Huehne, Dr.Onuma Piasai, Associate Professor , วารสาร: |
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 หัวเรื่อง:การสกัดแทนนินจากเปลือกกล้วย ผู้เขียน:Vipa Surojanamethakul, นางชิดชม ฮิรางะ สื่อสิ่งพิมพ์:pdf AbstractTannin was extracted form banana peels of Kluai Hom Tong, Kluai Nam-wa and Kluai Khai at different stages of ripeness. The result indicated that varieties and ripening stages affected the amount of tannin content. Kluai Hom Tong containes more tannin than Kluai Nam-wa (stages 1 and 3) and Kluai Khai (stages 1, 3 and 6). Green banana peels provided high level of tannin content and then decreased during the ripening process. Decreading rate of tannin inKluai Khai was quite high compared to the other ones. Tannin extraction from banana peels were carried out to determine the optimum condition such as type of solvents, extraction time, extraction temperature and ratio of banana peels to solvent. The recovery yield of tannin from one-time extraction was 81-85% of total tannin with 2 hrs soaking in 50% ethanol at 50?C and ratio of banana peels to solvent 1:30 or 1:40 w/v. Tannin was isolated and purified from the crude extracted of Kluai Nam-wa peel by adsorption chromatography on Sephadex LH-20. The brownish purified condensed tannin showed differences in their reactivity toward chemical reagents compared to hydrolyzable tannin as tannic acid. Condensed tannin also exhibited the ability to precipitate protein and metal ion. |
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