【摘要】 从健康女性粪便中筛选出一株耐氧性丁酸梭菌TK520,并对其特性进行研究。试验结果显示,丁酸梭菌TK520在限氧条件下仍能达到较高的菌体浓度,具有较好的耐氧性,利于丁酸梭菌的工业应用。测定丁酸梭菌TK520特性结果显示,丁酸梭菌TK520发酵α-酮异己酸(KIC)产量最高为(6.23±0.75) mg/L;蛋白酶酶活力最高为(50.74±1.82) U/mL;木聚糖酶的酶活力最高为(2.5±0.04) U/mL。更多还原

【Abstract】 An oxygen resistant strain of C. butyricum TK520 was screened from feces of healthy women. The results showed that the cell concentration of fermentation broth of C. butyricum TK520 could reach a high level under a large amount of limiting oxygen, it showed that C. butyricum TK520 had good oxygen-resistance and was beneficial to industrial application. Production ability of C. butyricum TK520 was tested, the results showed that: the butyric acid production of C. butyricum TK520 was higher than that of the tested strains, the yield of KIC was the highest 6.23 ±0.75 mg/L, the protease activity in fermentation liquid was the highest 50.74 ± 1.82 U/mL, and the xylanase activity was highest 2.5 ± 0.04 U/mL.更多还原