目的建立一种新的用离子交换层析从Cohn组分IV沉淀中分离纯化α1-抗胰蛋白酶(α1-antitrypsin,α1-AT)制剂的工艺。方法以Cohn组分Ⅳ为原料,用12倍体积20mmol/L Tris-HCl缓冲液溶解后,加入2.5%气相二氧化硅搅拌吸附脂蛋白等杂质。抽提...目的建立一种新的用离子交换层析从Cohn组分IV沉淀中分离纯化α1-抗胰蛋白酶(α1-antitrypsin,α1-AT)制剂的工艺。方法以Cohn组分Ⅳ为原料,用12倍体积20mmol/L Tris-HCl缓冲液溶解后,加入2.5%气相二氧化硅搅拌吸附脂蛋白等杂质。抽提液经离心收集上清,再用0.45μm滤膜过滤。将滤液上样于CM-Sepharose Fast Flow阳离子交换层析柱,收集未吸附的流穿蛋白液。再将收集的流穿液上样于Q-Sepharose Fast Flow阴离子交换层析柱,上样及平衡液清洗后,用含60mmol NaCl的缓冲液洗涤杂蛋白,再用含100mmol/L NaCl的缓冲液洗脱,收集洗脱液。展开更多
933214快速简易的噬菌体 DNA 分离法[英]/Kernodle,S.P.…//BioTechniques.-1993,14(8).-360～362[译自 DBA,1993,12(9),93-04859]纯化噬菌体 DNA 的新方法是:用分散的噬菌体侵染 Y1088或 LE392,并在室温下保温20分钟;37℃置于 NZ 培养...933214快速简易的噬菌体 DNA 分离法[英]/Kernodle,S.P.…//BioTechniques.-1993,14(8).-360～362[译自 DBA,1993,12(9),93-04859]纯化噬菌体 DNA 的新方法是:用分散的噬菌体侵染 Y1088或 LE392,并在室温下保温20分钟;37℃置于 NZ 培养基中裂解12～16小时;展开更多
The seed germination and tomato seedling tests showed that Bacillus subtilis SL-13 could promote the sprouting and seedling growth of tomato.The fresh and dry weight of tomato seedlings increased 42.86%and 18.75%,resp...The seed germination and tomato seedling tests showed that Bacillus subtilis SL-13 could promote the sprouting and seedling growth of tomato.The fresh and dry weight of tomato seedlings increased 42.86%and 18.75%,respectively.The control efficacies of the SL-13 to tomato Rhizoctonia rot were 20.65%and 35.23%in the greenhouse and field,respectively.The growth of the plant-pathogenic fungus Rhizoctonia solani was considerably inhibited in the presence of the strain SL-13 culture supernatant.The main antifungal protein was detected to be chitinase through vitro assay.The chitinase was purified with DEAE-Sepharose fast flow ion exchange column chromatography and Sephadex G-75 gel filtration for further characterization.The optimal pH and temperature for the chitinase activity were 7.0 and 50°C,respectively.It was demonstrated that the enzyme was stable at pH 5-9 and 40-60°C.70%of the enzyme activity was retained when incubated at 121°C and 0.11 MPa for 20 min,and the enzyme was not sensitive to protease K and ultraviolet radiation.Thus it is suitable for effective biological control in relatively unstable environment.展开更多
文摘目的建立一种新的用离子交换层析从Cohn组分IV沉淀中分离纯化α1-抗胰蛋白酶(α1-antitrypsin,α1-AT)制剂的工艺。方法以Cohn组分Ⅳ为原料,用12倍体积20mmol/L Tris-HCl缓冲液溶解后,加入2.5%气相二氧化硅搅拌吸附脂蛋白等杂质。抽提液经离心收集上清,再用0.45μm滤膜过滤。将滤液上样于CM-Sepharose Fast Flow阳离子交换层析柱,收集未吸附的流穿蛋白液。再将收集的流穿液上样于Q-Sepharose Fast Flow阴离子交换层析柱,上样及平衡液清洗后,用含60mmol NaCl的缓冲液洗涤杂蛋白,再用含100mmol/L NaCl的缓冲液洗脱,收集洗脱液。
文摘933214快速简易的噬菌体 DNA 分离法[英]/Kernodle,S.P.…//BioTechniques.-1993,14(8).-360～362[译自 DBA,1993,12(9),93-04859]纯化噬菌体 DNA 的新方法是:用分散的噬菌体侵染 Y1088或 LE392,并在室温下保温20分钟;37℃置于 NZ 培养基中裂解12～16小时;
基金Supported by the National Natural Science Foundation of China（20776017） the Xinjiang Uygur Autonomous Region High-tech Research and Development Project（20081108）+1 种基金 the Fok Ying Tung Education Foundation（101071） the Xinjiang Bingtuan Key Science and Technology Industry Project（2008GG24）
文摘The seed germination and tomato seedling tests showed that Bacillus subtilis SL-13 could promote the sprouting and seedling growth of tomato.The fresh and dry weight of tomato seedlings increased 42.86%and 18.75%,respectively.The control efficacies of the SL-13 to tomato Rhizoctonia rot were 20.65%and 35.23%in the greenhouse and field,respectively.The growth of the plant-pathogenic fungus Rhizoctonia solani was considerably inhibited in the presence of the strain SL-13 culture supernatant.The main antifungal protein was detected to be chitinase through vitro assay.The chitinase was purified with DEAE-Sepharose fast flow ion exchange column chromatography and Sephadex G-75 gel filtration for further characterization.The optimal pH and temperature for the chitinase activity were 7.0 and 50°C,respectively.It was demonstrated that the enzyme was stable at pH 5-9 and 40-60°C.70%of the enzyme activity was retained when incubated at 121°C and 0.11 MPa for 20 min,and the enzyme was not sensitive to protease K and ultraviolet radiation.Thus it is suitable for effective biological control in relatively unstable environment.
