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作者 贾培武 《电子与电脑》 2000年第12期109-109,共1页
智能ABC输入法因具有自动记忆、朦胧回忆等多项智能本领,因而广受一般办公人员的喜爱,是普通办公人员的首选输入法。笔者在使用中还发现“U”、“I”和“V”这三个键,在智能ABC输入法中有许多妙用。今整理于下,与大家共享。
关键词 智能ABC输入法 图形符号 中文输入法 汉字输入法 计算机 “U”键 “i”键 “V”键
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Ab initio Study on Ionization Energies of 3-Amino-1-propanol
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作者 王克栋 贾迎宾 +1 位作者 赖振讲 刘玉芳 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2011年第3期315-318,I0004,共5页
Fourteen conformers of 3-amino-1-propanol as the minima on the potential energy surface are examined at the MP2/6-311++G** level. Their relative energies calculated at B3LYP, MP3 and MP4 levels of theory indicated... Fourteen conformers of 3-amino-1-propanol as the minima on the potential energy surface are examined at the MP2/6-311++G** level. Their relative energies calculated at B3LYP, MP3 and MP4 levels of theory indicated that two most stable conformers display the intramolecular OH - N hydrogen bonds. The vertical ionization energies of these conformers calculated with ab initio electron propagator theory in the P3/aug-cc-pVTZ approximation are in agreement with experimental data from photoelectron spectroscopy. Natural bond orbital analyses were used to explain the differences of IEs of the highest occupied molecular ortibal of conformers. Combined with statistical mechanics principles, conformational distributions at various temperatures are obtained and the temperature dependence of photoelectron spectra is interpreted. 展开更多
关键词 Ab initio 3-amino-1-propanol conformer Vertical ionization energy Hydrogen bond Natural bond orbital
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Inter-chain disulfide bond improved protein trans-splicing increases plasma coagulation activity in C57BL/6 mice following portal vein FVIII gene delivery by dual vectors 被引量:1
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作者 ZHU FuXiang LIU ZeLong +3 位作者 WANG XiaoLei MIAO Jing QU HuiGe CHI XiaoYan 《Science China(Life Sciences)》 SCIE CAS 2013年第3期262-267,共6页
Protein trans-splicing based dual-vector factor VIII (FVIII) gene delivery is adversely affected by less efficiency of protein splicing. We sought to increase the amount of spliced FVIII protein and plasma coagulati... Protein trans-splicing based dual-vector factor VIII (FVIII) gene delivery is adversely affected by less efficiency of protein splicing. We sought to increase the amount of spliced FVIII protein and plasma coagulation activity in dual-vector FVIII transgene in mice by means of strengthening the interaction of inteins, protein splicing elements, thereby facilitating protein trans-splicing. Dual-vector delivery of the FVIII gene in cultured cells showed that replacement of Met226 in the heavy chain and Asp1828 in the light chain with Cys residues could facilitate inter-chain disulfide linking and improve protein trans-splicing, increasing the levels of spliced FVIII protein. In this study, C57BL/6 mice were coadministered dual vectors of intein-fused human FVIII heavy chain and light chain with Cys mutations via portal vein injection into the liver. Forty-eight hours post-injection, plasma was collected and analyzed for FVIII antigen concentration and coagulation activity. These mice showed increased circulating FVIII heavy chain polypeptide (442± 151 ng mL i vs. 305±103 ng mL-1) and coagulation activi- ty (1.46±0.37 IU mL i vs. 0.85±0.23 IU mL-1) compared with control mice co-administered dual vectors expressing the heavy and light chains of wild-type FVIII. Moreover, coagulation activity was similar to that of mice receiving a single vector ex- pressing FVIII (1.79_+0.59 IU mL-l). These findings indicate that improving protein trans-splicing by inter-chain disulfide bonding is a promising approach for increasing the efficacy of dual-vector based FVIII gene transfer. 展开更多
关键词 coagulation factor VIII protein trans-splicing dual-vector gene delivery plasma coagulation activity
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