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光促进温和条件下烯烃的氢甲酯化反应
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作者 尹静梅 由业诚 +3 位作者 高大彬 马永安 庄建勤 王祥生 《合成化学》 CAS CSCD 2000年第2期134-136,141,共4页
在紫外光照射下烯烃的氢甲酯化反应能在常温常压条件下完成 ,系统地研究了不同钴盐催化剂的反应规律及酸碱性对反应的影响。发现醋酸钠可大大提高反应的选择性及产率 ,提出了醋酸钠作用的初步机理 ,即对反应体系酸碱性的调节及醋酸钠与... 在紫外光照射下烯烃的氢甲酯化反应能在常温常压条件下完成 ,系统地研究了不同钴盐催化剂的反应规律及酸碱性对反应的影响。发现醋酸钠可大大提高反应的选择性及产率 ,提出了醋酸钠作用的初步机理 ,即对反应体系酸碱性的调节及醋酸钠与催化剂的相互作用。 展开更多
关键词 氢甲酯化 钴盐 催化剂 烯烃 光化有机合成
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Bacterial diversity in the sea surface microlayer of the Northern Yellow Sea of China
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作者 MING Hong-xia FAN Jing-feng +2 位作者 WANG Xiao-hui LI Hong-bo ZAN Shuai-jun 《Marine Science Bulletin》 CAS 2017年第2期1-19,共19页
The surface microlayer(SML)is a thin biogenic film found between the marine environment and troposphere that comprises a unique marine ecosystem with its own physicochemical and microbiological compositions.In this st... The surface microlayer(SML)is a thin biogenic film found between the marine environment and troposphere that comprises a unique marine ecosystem with its own physicochemical and microbiological compositions.In this study,we compared the bacterial cell abundance and community structure of the SML and subsurface waters(0.50m depth)using traditional culture and flow cytometry methods.Overall,53strains were screened and sequenced.In addition,DNA was extracted from the SML and corresponding subsurface water and used for bacterial community analysis by denaturing gradient gel electrophoresis(DGGE).The results revealed that the SML had a distinct microbial community structure from the corresponding subsurface water.This is the first compresensively detailed molecular biological analysis of the bacterioneuston in the Yellow Sea of China. 展开更多
关键词 surface microlayer bacterial diversity denaturing gradient gel electrophoresis
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