Rocket UV flash spectra from the solar eclipse of March 7, 1970

Flash spectra of the total solar eclipse throughout all its phases have been obtained in the extreme ultraviolet for the first time.     

Millisecond X-ray diffraction and the first electron density map from Laue photographs of a protein crystal

Attempts to use X-ray crystallography to extract three-dimensional information on transient phenomena in crystals have been hampered primarily by long data collection times. Here we report on the first difference Fourier map obtained from Laue diffraction photographs of a protein crystal, glycogen phosphorylase b. Data collection time was 3 s using the high-intensity white X-radiation generated on the wiggler magnet of the Daresbury Synchrotron Radiation Source (SRS), but data acquisition in the millisecond-submillisecond range is possible. The method presented here uses a simple difference technique and was designed to analyse structural changes relative to a known starting structure. The combination of this approach with cine techniques allows the recording of three-dimensional motion pictures at atomic resolution and opens up new areas in structural biology and chemistry.     

太阳光控薄膜的研制

利用光控膜对太阳光透过或反射的选择性,借以改善节能建筑热光性能,获得舒适的环境.同时通过该光控膜彩色反射作用增加美感,这是近年来发展起来的一项技术.制备这些光控膜的工艺方法很多,如真空蒸发、溅射浸渍、喷涂热解及化学沉积等.光控膜可直接沉积在玻璃上,也可以沉积在塑料聚酯膜上,再粘到玻璃上.实际应用中要求     

Crystal structure determining of 7-ADCA based on X-ray powder diffraction

Traditionally, crystal structure data can be collected and determined from single-crystal X-ray diffraction. However, in the fields of organic and macromolecular crystallography, it is often difficult or impractical to grow single crystals with suitable sizes and purity. Therefore, it will be benefited from the newly growing analytical tool that combining X-ray powder diffraction based on polycrystalline samples and ab initio calcula- tion[1]. 7-ADCA is one of the most important intermediate…