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  • 學位論文

以穀類及抗性澱粉類為發酵基質生產乳酸菌之研究

Production of Lactic Acid Bacteria Using Cereals and Resistant Starch as Fermentation Broth

指導教授 : 陳齊聖
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摘要


本研究探討三類含抗性澱粉(香蕉、山藥;黃豆、黑豆;燕麥、糙米)之培養基,接種Lactobacillus acidophilus (A菌)、Bifidobacterium bifidum (B菌)及Lactobacillus sporogenes (S菌)進行液態培養,以平板塗抹劃菌法計算菌體濃度,並利用棚架式乾燥系統進行乾燥,對於不同的培養基發酵乳酸菌,觀察乾燥後菌體活性。 實驗結果顯示,以A菌、B菌、S菌三種菌種活性比較,抗性澱粉類生山藥培養基以A菌最佳,達4.3×108 CFU/mL,其他培養基皆以B菌為最佳菌體活性:熟山藥培養基7.7×108 CFU/mL、香蕉皮培養基達5.5×108 CFU/mL,香蕉肉培養基達6.8×108 CFU/mL,黃豆培養基達1.1×109 CFU/mL,黑豆培養基達1.2×109 CFU/mL,燕麥培養基達9.5×108 CFU/mL,糙米培養基達5.7×108 CFU/mL。S菌黑豆培養4.6×108 CFU/ mL為最佳菌體濃度。A菌乾燥後的菌數,以燕麥培養基之菌種活性最佳,達1.3×107 CFU/g,B菌乾燥後的菌數,以糙米培養基,菌種活性最佳,達2.2×107 CFU/g,S菌乾燥後的菌數,黑豆培養基較佳菌種活性達2.6×107 CFU/g;A菌、B菌、S菌乾燥後的菌數比較,豆類培養基乾燥後,皆以S菌活性最佳,黑豆培養基達2.6×107 CFU/g、黃豆培養基達1.3×107 CFU/g。燕麥培養基乾燥後以A菌活性為最佳,達1.3×107 CFU/g,糙米培養基乾燥後以B菌為最佳菌體活性,達2.2×107 CFU/g,乾燥後的抗性澱粉菌體活性在1.8×106至6.5×106 CFU/g之間。

關鍵字

抗性澱粉 穀類 豆類 乾燥 乳酸菌

並列摘要


In this research, mediums containing three types of resistant starch: bananas, Chinese yam; soy beans, black soy beans; and oats, brown rice; were used for culturing Lactobacillus acidophilus, Bifidobacterium bifidum, Lactobacillus sporogenes in submerged fermentation. Viable bacteria concentrations were determined by spread plate for colony enumeration. Then use shelf-type drying system to make lactic acid bacteria (LAB) powder. The cell viabilities in the LAB powder were compared. The results of submerged fermentation showed that, in raw Chinese yam, the cell activity of L. acidophilus (4.3×108 CFU/mL) was the highest among the species investigated. In medium of other components, the viability of B. bifidum were: in boiled Chinese yam, 7.7×108 CFU/mL; in banana peel, 5.5×108 CFU/mL; in banana pulp, 6.8×108 CFU/mL; in soy beans, 1.1×109 CFU/mL; in black soy beans, 1.2×109 CFU/mL; in oats, 9.5×108 CFU/mL; and in brown rice, 5.7×108 CFU/mL. L. sporogenes grew best in black soy beans with cell viability of 4.6×108 CFU/mL. After drying, the cell viabilities were: L. acidophilus in oats 1.3×107 CFU/g; B. bifidum in brown rice 2.2×107 CFU/g; and L. sporogenes in black soy beans 2.6×107 CFU/g. The viability of LAB powder in resistant starch fermentation after drying process ranged from 1.8×106 to 6.5×106 CFU/g.

並列關鍵字

cereal beans drying lactic acid bacteria resistant starch

參考文獻


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