Summary of main observation and conclusion The radical-initiated carboxylative cyclization of allylamines with CO2 represents an efficient and highly promising
Summary of main observation and conclusion In order to extend the absorption spectrum of poiyoxo-titanium clusters into the visible region,two new heterometal-o
Summary of main observation and conclusion In multidimensional (nD) NMR spectroscopy,t1 noise usually appears as ridges along indirect dimensions,and affects ob
Summary of main observation and conclusion Understanding and optimizing structure of active sites is of significance in zeolite catalysis.Benzene ethylation is
Background rnOrganofluorine compounds play an important role in pharmaceuticals,agrochemicals and material sciences owing to the unique nature of fluorine.[1] R
BackgroundrnThe partial scenario of the time on earth is that the last century is the information age from silicon to computer while the 21st century is the era
Because carbon dioxide is abundant,cheap and nontoxic in organic synthesis,much work has been done in organic synthesis with carbon dioxide.[1] Allenes are an i
第八届青海省文学艺术奖评选活动已经圆满结束.今天,省委、省政府隆重召开表彰大会,对获奖的作者和作品进行表彰,这是我省文学艺术界的盛会.借此机会,我就贯彻党的十九大精神
王之涣的《凉州词》中有“黄河远上白云间,一片孤城万仞山”的名句,描绘了青藏高原群山起伏的高原特色.李白《将进酒》开篇“君不见黄河之水天上来,奔流到海不复回”,更是大
棕背黑头鸫rn无名小河自东向西蜿蜒,发出哗哗声响,河水不算清洌,可能上游地区才落了场雨.河流自然来源于不远处的祁连山脉,那山我已经熟悉,曾数次登临.海拔高,云雾便始终在那