期刊文献+
共找到3篇文章
< 1 >
每页显示 20 50 100
美利用基因工程技术研制生物计算机
1
《计算机研究与发展》 EI CSCD 北大核心 2008年第7期1278-1278,共1页
来自美国戴维森学院、北卡罗来那大学和密苏里西部大学等多个高校生物和数学专业的研究人员,通过对埃希氏菌属大肠杆菌添加基因,成功创造出细菌计算机.这一经基因改造后的细菌是名副其实可以进行计算的“微生物”.与传统计算机相比... 来自美国戴维森学院、北卡罗来那大学和密苏里西部大学等多个高校生物和数学专业的研究人员,通过对埃希氏菌属大肠杆菌添加基因,成功创造出细菌计算机.这一经基因改造后的细菌是名副其实可以进行计算的“微生物”.与传统计算机相比,这种生物计算机有更多潜在的优势,一个小摇瓶就可以培养上百亿的细菌,每一个都能包含多个拷贝的DNA片段用来计算; 展开更多
关键词 生物计算机 基因工程技术 埃希氏菌属大肠杆菌 DNA片段 研究人员 数学专业 基因改造 戴维森
下载PDF
THE CHEMICAL MODIFICATION OF E. Coli L-ASPARAGINASE WITH O - CARBOXYMETHYLATED CHITOSAN
2
作者 Li Minqin Ma JianbiaoPan Zaiqun +2 位作者 Xu Huixian Wang Daobin He Binglin(The State Key Laboratory of Functional Polymer Materials for Adsorption and Separation,Institute of Polymer Chemistry, Nankai University, Tianjin 300071, P. R. China) 《Chinese Journal of Reactive Polymers》 1998年第1期49-53,共5页
Escherichia colt L - asparaginase was modified with O - carboxymethylated chitosan using glutaraldehyde as a coupling agent. The resulting coujugate retained more than 50% of its original enzyme activity under theprot... Escherichia colt L - asparaginase was modified with O - carboxymethylated chitosan using glutaraldehyde as a coupling agent. The resulting coujugate retained more than 50% of its original enzyme activity under theprotection of its normal substrate or product and shoWed marked resistance toproteolysis by trypsin and chymotrypsin. 展开更多
关键词 化学修饰 埃希氏菌属大肠杆菌 L-天门冬酰胺酶 羧甲基壳聚糖 聚氨基葡糖
下载PDF
Process Control for Production of Human-like Collagen in Fed-batch Culture of Escherichia coli BL 21 被引量:7
3
作者 骆艳娥 范代娣 +4 位作者 马晓轩 王德伟 米钰 花秀夫 李稳宏 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2005年第2期276-279,共4页
Recombinant E. coli BL 21 was cultivated in high cell density to produce human-like collagen. The effects of the feeding of nitrogen source, controlled by an auto on/off-feeding mode with two different cycles of 0.5mi... Recombinant E. coli BL 21 was cultivated in high cell density to produce human-like collagen. The effects of the feeding of nitrogen source, controlled by an auto on/off-feeding mode with two different cycles of 0.5min and 4min intervals, oxygen-enrichment methods and inducement strength on the cell yield and human-like collagen production were investigated. The studies showed that nitrogen source feeding in fast cycle could result in higher human-like collagen production than that in slow cycle; and the feedback regulation of glucose, increase of the pressure of fermentation bioreactor, and supply of oxygen-enriched air could all increase cell yield and human-like collagen production. The effects of inducement strength on protein expression were found important. When OD600 reached 90-100, the cultivation temperature was increased to 42℃ to begin induction for 2-3 h, and then shifted to 39℃ for 5-6h induction, the cell density and human-like collagen production could reach 96g·L-1 [DCW (dry cell mass)] and 19.8% (g·g-1 DCW) respectively. 展开更多
关键词 human-like collagen recombinant Escherichia COLI fed-batch culture nitrogen oscillation oxygenenrichment temperature inducement
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部