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在大型仪器分析实验教学中,为了提升学生对基础知识的运用能力,提高学生的动手能力、创新能力,通过引入培训、教学双模式,建立了大型仪器多层次(即基础理论培训、上机操作技术培训和仪器功能应用培训)培训体系。实践证明这种多层次培训体系搭建了学生与专家、学者之间交流的平台。从理论讲解到操作,再到应用的多层次培训体系有效地弥补了大型仪器实验教学中单一教学模式存在的不足,可以很好地培养本科生和研究生的学习兴趣,提高学生分析问题、解决问题的科研能力,同时提升了仪器使用效率,储备了大量仪器方面的专业人才。 相似文献
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Convenient procedure for coupling of 1,2,3,5-tetra-O-acetyl-β-D-ribofuranose and 4-nitroimidazole was provided to obtain β-anomer as major product. A novel category of nucleoside analogues with an imidazole base moiety bearing amino-acid residue was designed and synthesized to develop selective and effective antiviral agents. They were evaluated for the anti-HBV activity. 相似文献
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Asymmetric Pinacol Coupling of Aromatic Aldehydes Catalyzed by TiCl_4(THF)_2-Zn/Chiral Diamines 总被引:1,自引:0,他引:1
IntroductionFormationofradicalanionscatalyzedbythetransitionmetalisachallengingfieldinorganicsynthesisasitcanleadtopotentialcontrolofdiastereoselectivityandenan tioselectivityinawiderangeoforganictransformations .1Thereductivecouplingreactionofaldehydesisanimpor tantmethodofcarbon carbonbondformation .Itisalsothemostdirectandefficientmethodofsynthesizingvicinaldi ols .2 ,3VariousmetalssuchasMg ,4 Al,5Zn ,6 Ce ,7Mn ,8Sm ,9Ti,10 Sn11andCr12 havebeenshowntobeefficientinpinacolcoupling .Sincet… 相似文献
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Asymmetric pinacol coupling of aromatic aldehydes catalyzed by chiral diamines/iow-valent titanium complexes gave corre-sponding pinacois in good yields with high diastereoselectivity and moderate enantioselectivities. 相似文献
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