Electrochemical Scanning TUnneling Microscopy (ECSTM) has been extended to characterizc polycrystalline silver electrode surfaces in iodide solution. Potential-dependcnt ordered and disordered structures of the silver...Electrochemical Scanning TUnneling Microscopy (ECSTM) has been extended to characterizc polycrystalline silver electrode surfaces in iodide solution. Potential-dependcnt ordered and disordered structures of the silver electrode as well as the iodine adsorption layer have been obscrved to coexist on polycrystalline silver electrode surfaces, for the first time. A very special column arrangement of the iodine adsorption layer, similar to the so called "ndssing row" type of structure has been obseryed. Some columns of the iodine adsorption layer roll over from one place to another along with the time and changing potential. A proposed model has been given to better describe the structure. The highly corrugated and loose surface structure of the polycrystalline surface are responsible for this special phenomenon.展开更多
5月12日，清华大学生命学院、结构生物学高精尖创新中心施一公研究组于《细胞》（Cell）在线发表了题为《人源剪接体的原子分辨率结构》（An Atomic Structure of the Human Spliceosome）。这是第一个高分辨率的人源剪接体结构，也是...5月12日，清华大学生命学院、结构生物学高精尖创新中心施一公研究组于《细胞》（Cell）在线发表了题为《人源剪接体的原子分辨率结构》（An Atomic Structure of the Human Spliceosome）。这是第一个高分辨率的人源剪接体结构，也是首次在近原子分辨率的尺度上观察到酵母以外的、来自高等生物的剪接体的结构，进一步揭示了剪接体的组装和工作机理，为理解高等生物的RNA剪接过程提供了重要基础。展开更多
文摘Electrochemical Scanning TUnneling Microscopy (ECSTM) has been extended to characterizc polycrystalline silver electrode surfaces in iodide solution. Potential-dependcnt ordered and disordered structures of the silver electrode as well as the iodine adsorption layer have been obscrved to coexist on polycrystalline silver electrode surfaces, for the first time. A very special column arrangement of the iodine adsorption layer, similar to the so called "ndssing row" type of structure has been obseryed. Some columns of the iodine adsorption layer roll over from one place to another along with the time and changing potential. A proposed model has been given to better describe the structure. The highly corrugated and loose surface structure of the polycrystalline surface are responsible for this special phenomenon.
文摘5月12日，清华大学生命学院、结构生物学高精尖创新中心施一公研究组于《细胞》（Cell）在线发表了题为《人源剪接体的原子分辨率结构》（An Atomic Structure of the Human Spliceosome）。这是第一个高分辨率的人源剪接体结构，也是首次在近原子分辨率的尺度上观察到酵母以外的、来自高等生物的剪接体的结构，进一步揭示了剪接体的组装和工作机理，为理解高等生物的RNA剪接过程提供了重要基础。
