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  • 學位論文

利用饋料醱酵生產納豆激酶之研究

Production of Nattokinase by Fed-batch Fermentation

指導教授 : 段國仁
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摘要


從市售納豆健康食品中分離篩選出可生產納豆激酶 ( Nattokinase ) 的菌株A,藉由液態搖瓶培養生產納豆激酶,其最適條件以3%黃豆粉、3% 葡萄糖,並額外添加0.5% CaCO3、 0.5% KH2PO4和0.1% MgSO4‧7H2O為培養基,在溫度37℃、180 rpm的條件下進行培養,經醱酵培養48小時之後得到酵素最佳活性值27 U/mL。 批次醱酵試驗結果指出,接種10%的種菌液,以1 vvm 之通氣量,配合300 rpm 的攪拌速度,於37℃下進行放大培養,結果指出菌株A於培養第42 小時出現最佳之酵素活性 ( 81.3 U/mL )。 饋料批次醱酵分為兩階段,第一階段以葡萄糖為主,目的是要提高細胞濃度,接著以黃豆粉為氮源以及酵素生產的誘導劑,在醱酵培養第48 小時出現最佳之酵素活性 ( 330 U/mL )。 在酵素的pH穩定性及溫度穩定性實驗中,粗酵素液之最穩定的pH值在6.0〜7.0,將粗酵素一保存在4℃,1個月後,仍可維持65%的活性。

關鍵字

納豆激酶 饋料醱酵

並列摘要


Abstract We isolate a strain A from natto purchased from the local market. It was employed for the production of nattokinase by shaking culture at 180 rpm and 37 C. The optimum medium for the shaking culture was (g/l) : 3% soybean flour, 3% glucose, 0.5% CaCO3, 0.5% KH2PO4, 0.1% MgSO4.7 H2O. The nattokinase activity of 27 unit/ml was achieved after 48 h shaking culture. The batch fermentation was performed using the same medium as the shaking culture at 300 rpm, 1 vvm of aeration, 37 C. 81.3 unit/ml of nattokinase activity was achieved after 42 h cultivation. Fed-batch fermentation was initialized by using the batch fermentation. Various concentrations of glucose, yeast extract and soybean flour were employed to formulate the feeding medium. 330 unit/ml nattokinase was achieved after 48 h cultivation for the fed-batch fermentation. The crude enzyme was stable at pH 6~7, and 65 % activity retained for the crude enzyme stored at 4 C for 1 month.

並列關鍵字

nattokinase

參考文獻


謝寶全、鄧德豐、陳武元、林麗菁,2004。納豆菌之液態培養及其產生Nattokinase之探討。九十一年度國科會專題研究計畫成果報告。
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被引用紀錄


彭一凡(2007)。探討照光強度對納豆菌生長與納豆激酶生產之影響〔碩士論文,國立中央大學〕。華藝線上圖書館。https://www.airitilibrary.com/Article/Detail?DocID=U0031-0207200917345834
郭洲獎(2011)。利用芽孢桿菌醱酵生產納豆激酶與環狀糊精葡萄糖苷轉移酶之研究〔博士論文,大同大學〕。華藝線上圖書館。https://www.airitilibrary.com/Article/Detail?DocID=U0081-3001201315110885

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