The enthalpies of mixing for the PbCl_2-NaCl-BaCl_2 ternary molten salt mixtures have been measured along four iso-αPbCl_2 Iines by using a SETARAM calorimeter at 873 K.The results show that the molar enthalpy of mix...The enthalpies of mixing for the PbCl_2-NaCl-BaCl_2 ternary molten salt mixtures have been measured along four iso-αPbCl_2 Iines by using a SETARAM calorimeter at 873 K.The results show that the molar enthalpy of mixing between iso-αPbCl_2 liquid binary subsystems PbCl_2-NaCl and PbCl_2-BaCl_2 is near zero.approximately fitting the partial ideal solution model.展开更多
Low temperature is one of the most important environmental stresses that affect plant survival,growth and development.In response to cold stress,hundreds of genes are upor down-regulated in plants[1].The C-repeat bind...Low temperature is one of the most important environmental stresses that affect plant survival,growth and development.In response to cold stress,hundreds of genes are upor down-regulated in plants[1].The C-repeat binding factor（CBF）regulon is the best-understood cold-responsive transcriptional module[1].In Arabidopsis,there are three CBF genes,i.e.,CBF1,CBF2 and CBF3.They are rapidly.展开更多
The experimental investigations on the interaction between Ag-nanocrystal particles (Ag-NCPs) and carbon nanotubes (CNTs) in Ag-nanocrystal particles/carbon nanotubes (Ag-NCPs/CNTs) hybrid structures were reported. Th...The experimental investigations on the interaction between Ag-nanocrystal particles (Ag-NCPs) and carbon nanotubes (CNTs) in Ag-nanocrystal particles/carbon nanotubes (Ag-NCPs/CNTs) hybrid structures were reported. The growth of Ag-NCPs on multiwalled carbon nanotubes (MWCNTs) was carried out by thermal evaporation deposition. High-resolution transmission electron microscopy and X-ray diffraction analyses revealed that Ag-NCPs had the crystal lattice feature of face-centered cube (fcc). The growth of Ag-NCPs on MWCNTs induced the cross-section deformation of MWCNT. The experimental results also showed that the synthesized Ag-NCPs/CNTs hybrid structure appeared as quasi-one dimensional nanowires containing the Ag-NCP/CNT hetero-junction. There was local cross-section deformation on MWCNTs at the interface of hetero-junction. These results involve the important topic about fundamental and practical studies for structure of MNCPs on CNTs and also find clues to further research of Ag nanocrystal growing on MWCNTs and related Ag-CNT interaction.展开更多
Gene expression is intensively regulated at the transcript level. It is the rate of transcription and the rate of degrada- tion that together determine the steady-state level of a specific transcript. A whole-genome s...Gene expression is intensively regulated at the transcript level. It is the rate of transcription and the rate of degrada- tion that together determine the steady-state level of a specific transcript. A whole-genome study indicates that the half-life of Arabidopsis transcripts varies from 0.2 to 〉24 h, indicating large variations in the turnover rate of specific transcripts, which is related to their biological functions.展开更多
文摘The enthalpies of mixing for the PbCl_2-NaCl-BaCl_2 ternary molten salt mixtures have been measured along four iso-αPbCl_2 Iines by using a SETARAM calorimeter at 873 K.The results show that the molar enthalpy of mixing between iso-αPbCl_2 liquid binary subsystems PbCl_2-NaCl and PbCl_2-BaCl_2 is near zero.approximately fitting the partial ideal solution model.
文摘Low temperature is one of the most important environmental stresses that affect plant survival,growth and development.In response to cold stress,hundreds of genes are upor down-regulated in plants[1].The C-repeat binding factor（CBF）regulon is the best-understood cold-responsive transcriptional module[1].In Arabidopsis,there are three CBF genes,i.e.,CBF1,CBF2 and CBF3.They are rapidly.
基金Supported by the National Natural Science Foundation of China (Grant No. 10575128)Shanghai Leading Academic Disciplines Project (Grant No. S30109)
文摘The experimental investigations on the interaction between Ag-nanocrystal particles (Ag-NCPs) and carbon nanotubes (CNTs) in Ag-nanocrystal particles/carbon nanotubes (Ag-NCPs/CNTs) hybrid structures were reported. The growth of Ag-NCPs on multiwalled carbon nanotubes (MWCNTs) was carried out by thermal evaporation deposition. High-resolution transmission electron microscopy and X-ray diffraction analyses revealed that Ag-NCPs had the crystal lattice feature of face-centered cube (fcc). The growth of Ag-NCPs on MWCNTs induced the cross-section deformation of MWCNT. The experimental results also showed that the synthesized Ag-NCPs/CNTs hybrid structure appeared as quasi-one dimensional nanowires containing the Ag-NCP/CNT hetero-junction. There was local cross-section deformation on MWCNTs at the interface of hetero-junction. These results involve the important topic about fundamental and practical studies for structure of MNCPs on CNTs and also find clues to further research of Ag nanocrystal growing on MWCNTs and related Ag-CNT interaction.
文摘Gene expression is intensively regulated at the transcript level. It is the rate of transcription and the rate of degrada- tion that together determine the steady-state level of a specific transcript. A whole-genome study indicates that the half-life of Arabidopsis transcripts varies from 0.2 to 〉24 h, indicating large variations in the turnover rate of specific transcripts, which is related to their biological functions.
