产碱性纤维素酶菌株的筛选及酶学性质研究
摘要:从采集的造纸厂土样中,筛选出l株产碱性纤维素酶酶活力较高的菌株H-1,经鉴定,该菌株为革兰氏阳性芽孢杆菌属。发酵产酶条件和酶学性质研究表明H-1菌株的适宜发酵条件为:接种量为6%,pH 9.0,温度为37 ℃,此条件下的酶活力可达8.69 U/mL,是初始酶活力(2.93 U/mL)的3倍。该酶最适反应温度为40 ℃,最适反应pH 9.0。在25~55 ℃,pH 7.0~11.0仍能保持60%以上的酶活力,能较好地满足日常洗涤的环境要求。
关键词:碱性纤维素酶(CMC酶);菌株筛选;发酵条件;酶学性质
Screening of Alkaline-Cellulose Producing Strain and Study on Its Enzymaic Characterization
Abstract: From soil samples collected from paper mills, one strain called H-1 capable of degrading cellulose was screened and identified as Gram-positive Bacillus. The optimum enzyme-producing conditions were as follows, inoculum amount 6%, pH 9.0 , temperature 37 ℃. The enzyme activity was up to 8.69 U/mL, which was 3 times higher than the initial enzyme activity(2.93 U/mL). The optimal conditions for the enzymatic reaction were about 40 ℃ and pH 9.0. The enzyme activity could be maintained above 60% at temperature 25~55℃ and pH 7.0~11.0, which meet the environmental requirements of the daily washing.
Key words: a lkaline-cellulose enzyme (CMC enzyme); strain screening; fermentation conditions; characteristics of enzyme
纤维素酶的研究一般都以有效利用纤维素资源为主,酶作用的pH多为酸性,当添加到洗涤剂中,由于所处环境为碱性而失去活力,不能发挥作用[1]。近年来碱性纤维素酶的发现使其在洗涤工业中得到成功应用。碱性纤维素酶是纤维素酶系的一个组分,即羧甲基纤维素酶(CMC酶),它不含有纤维素酶系的
产碱性纤维素酶菌株的筛选及酶学性质研究
摘要:从采集的造纸厂土样中,筛选出l株产碱性纤维素酶酶活力较高的菌株H-1,经鉴定,该菌株为革兰氏阳性芽孢杆菌属。发酵产酶条件和酶学性质研究表明H-1菌株的适宜发酵条件为:接种量为6%,pH 9.0,温度为37 ℃,此条件下的酶活力可达8.69 U/mL,是初始酶活力(2.93 U/mL)的3倍。该酶最适反应温度为40 ℃,最适反应pH 9.0。在25~55 ℃,pH 7.0~11.0仍能保持60%以上的酶活力,能较好地满足日常洗涤的环境要求。
关键词:碱性纤维素酶(CMC酶);菌株筛选;发酵条件;酶学性质
Screening of Alkaline-Cellulose Producing Strain and Study on Its Enzymaic Characterization
Abstract: From soil samples collected from paper mills, one strain called H-1 capable of degrading cellulose was screened and identified as Gram-positive Bacillus. The optimum enzyme-producing conditions were as follows, inoculum amount 6%, pH 9.0 , temperature 37 ℃. The enzyme activity was up to 8.69 U/mL, which was 3 times higher than the initial enzyme activity(2.93 U/mL). The optimal conditions for the enzymatic reaction were about 40 ℃ and pH 9.0. The enzyme activity could be maintained above 60% at temperature 25~55℃ and pH 7.0~11.0, which meet the environmental requirements of the daily washing.
Key words: a lkaline-cellulose enzyme (CMC enzyme); strain screening; fermentation conditions; characteristics of enzyme
纤维素酶的研究一般都以有效利用纤维素资源为主,酶作用的pH多为酸性,当添加到洗涤剂中,由于所处环境为碱性而失去活力,不能发挥作用[1]。近年来碱性纤维素酶的发现使其在洗涤工业中得到成功应用。碱性纤维素酶是纤维素酶系的一个组分,即羧甲基纤维素酶(CMC酶),它不含有纤维素酶系的