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CuO/TiO_2的制备及对NO+CO反应性能的研究 被引量:10
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作者 楼莉萍 蒋晓原 +1 位作者 陈英旭 郑小明 《燃料化学学报》 EI CAS CSCD 北大核心 2003年第5期490-495,共6页
以三种不同的TiO2为载体,负载6%CuO,在色谱 微反装置上考察了三种Cu6 Ti催化剂对NO+CO反应的活性。结果表明,由于制备方法不同,活性差别很大,三者活性顺序依次为:Cu6 Ti(T)>Cu6 Ti(S)>Cu6 Ti(nm),TiO2的比表面积及晶型对活性的影... 以三种不同的TiO2为载体,负载6%CuO,在色谱 微反装置上考察了三种Cu6 Ti催化剂对NO+CO反应的活性。结果表明,由于制备方法不同,活性差别很大,三者活性顺序依次为:Cu6 Ti(T)>Cu6 Ti(S)>Cu6 Ti(nm),TiO2的比表面积及晶型对活性的影响不明显。H2 TPR结果表明,Cu6 Ti在整个TPR过程中出现了3或4个还原峰,表明有多种CuO物种存在。不同预处理Cu6 Ti的TPR显示,在反应中Cu物种可能以多种价态同时存在。NO TPD结果亦证明,Cu6 Ti对NO+CO的反应活性与NO在催化剂表面的解离难易密切相关,而与NO的吸附量关系不大。 展开更多
关键词 CuO/TiO2 NO+CO反应 载体制备方法
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Research on the Construction of Bacterial Artificial Chromosome Vector DNA and the Potentials in Application
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作者 崔红玉 王亚萍 +5 位作者 徐明举 薛永志 石星明 兰德松 王云峰 童光志 《Agricultural Science & Technology》 CAS 2008年第2期70-75,共6页
[ Objective] The aim of this study was to provide a method for solving the problems in preparing BAC vector with High-copy plasmid pUC119- Bluelox BAC. [ Method ] With selecting a proper single restriction site, seque... [ Objective] The aim of this study was to provide a method for solving the problems in preparing BAC vector with High-copy plasmid pUC119- Bluelox BAC. [ Method ] With selecting a proper single restriction site, sequences of a single copy BAC vector plasmid were inserted into proper site of High-copy plasmid pUC119 vector. [ Result] The gene sequence of BAC vector lost control function of single copy number in new plasmid pUC119-BAC and was copied through High-copy form. The gene sequence of BAC vector basic function was completely cutted off through single enzyme digestion and the control function of single copy could be recovered by auto-connection. [ Conclusion] The High-copy pUC119-BAC plasmid was used to copy and amplify high copy of basic function gene sequence in BAC vector, besides that it could be used to construct transfer vector of molecular cloned recombinant virus or BAC library. 展开更多
关键词 Bacterial artificial chromosome (BAC) High-copy plasmid BAC vector Single-copy plasmid
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