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    題名: Conversion of squid pen by Serratia ureilytica for the production of enzymes and antioxidants
    作者: Wang, San-lang;Lin, Chin-lin;Liang, Tzu-wen;Liu, Kao-cheng;Kuo, Yi-hsuan
    貢獻者: 淡江大學化學學系
    關鍵詞: Serratia ureilytica;Chitinase;Protease;Antioxidant activity;Squid pen wastes
    日期: 2009-01
    上傳時間: 2013-02-27 09:31:44 (UTC+8)
    出版者: Amsterdam: Elsevier BV
    摘要: Two proteases (P1 and P2) and a chitinase (C1) were purified from the culture supernatant of Serratia ureilytica TKU013 with squid pen as the sole carbon/nitrogen source. The molecular masses of P1, P2 and C1 determined by SDS–PAGE were approximately 50 kDa, 50 kDa and 60 kDa, respectively. The optimum pH, optimum temperature, pH stability, and thermal stability of P1, P2 and C1 were (pH 10, 40 °C, pH 7–11, and <50 °C), (pH 10, 40 °C, pH 8–11, and <40 °C) and (pH 6, 50 °C, pH 5–8, and <50 °C), respectively. P1 and P2 were inhibited by Mg2+, EDTA and C1 was inhibited completely by Cu2+. The antioxidant activity of TKU013 culture supernatant was 72% per mL (DPPH scavenging ability). With this method, we have shown that squid pen wastes can be utilized and have revealed its hidden potential in the production of functional foods.
    關聯: Bioresource Technology 100(1), pp.316-323
    DOI: 10.1016/j.biortech.2008.06.026
    顯示於類別:[化學學系暨研究所] 期刊論文

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