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International Journal of Organic Chemistry 2014年第3期4卷 174-181页

作者： Khalid Hussain Deepak Wadhwa Department of chemistry Kurukshetra University Kurukshetra India Mewat Engineering College (WAKF) Nuh India

A mild, general, convenient, and efficient one-pot synthesis of 4-arylpyridines (4) is described using conventional heating, ultrasound and microwave irradiation. Aryl aldehydes (2) were efficiently condensed with ethylacetoacetate (1) and ammonium acetate in acetonitrile to give dihydropyridine intermediates (4). The latter underwent a smooth Iodobenzene diacetate (III) mediated aromatization reaction in the same pot to afford 4-arylpyridines (4) in good to excellent yields.

关键词： Dihydropyridines Iodobenzene diacetate Ultrasonic Microwave One-Pot Formylpyrazoles

Cobalt Sulfate as a Recyclable Catalyst for Chemoselective Synthesis of diacetates from Aldehydes

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Chemical Research in Chinese Universities 2009年第4期25卷 455-457页

作者： WANG Min TIAN Gui-fu SONG Zhi-guo JIANG Heng College of Chemistry and Chemical Engineering Bohai University Jinzhou 121000 P. R. China Center for Science ＆ Technology Experiment Bohai University Jinzhou 121000 P. R. China College of Petrochemical Engineering Liaoning Shihua University Fushun 113001 P. R. China

A mild and efficient method for diacetylation reaction was developed,by which diacetate could be achieved through the reaction of aldehyde with acetic anhydride,in the presence of cobalt sulfate,with an admirable yiel... 详细信息

关键词： diacetate Aldehyde Acetic anhydride Cobalt sulfate

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NEW 19-NOR-ENT-LABDANE AND 16, 19-DIHYDROXY-ENT-KAURENE FROM Austroeupatorium inulaefolium

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Chinese Science Bulletin 1988年第1期33卷 69-71页

作者：孙洪发 J.JAKUPOVIC F.BOHLMANN R.M.KING H.ROBINSON Institute for Organic Chemistry Technical University of Berlin D-1000 Berlin 12 West German Institute for Organic Chemistry Technical University of Berlin D-1000 Berlin 12 West Germany Smithsonian Institution Department of Botany Washington DC 20560 U.S.A.

Austroeupatorium inulaefolium (B. L. Robinson) K. et R. has been investigated. A collection from Ecuador gave several ent-labdanes like austrofolin and related compounds. A second collection from Paraguay gave ent-kaurene derivatives and three nor-ent-labdanes. A third investigation of material from Argentina also gave ent-kaurenes and nor-ent-labdanes, which were only slightly different from those of the Paraguay location.

关键词： collection slightly petrol formulae diacetate likely Negro singlet 占一 polar

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细胞死亡的判断方法

国外医学.临床生物化学与检验学分册 1985年第6期 44-45页

作者：魏中坚杨洋

判断细胞的生死,一般以实验系统内细胞某种性质的变化作为指标。目前这样的指标已报道了40多种,大致分为以下6类: 1.群落计数法1955年Puck和Marcus根据哺乳类细胞在体外固体培养基中具有增殖并形成群落的特点创立了定量测定法。如果细... 详细信息

判断细胞的生死,一般以实验系统内细胞某种性质的变化作为指标。目前这样的指标已报道了40多种,大致分为以下6类: 1.群落计数法1955年Puck和Marcus根据哺乳类细胞在体外固体培养基中具有增殖并形成群落的特点创立了定量测定法。如果细胞在一定的培养期内能分裂,增

关键词：细胞死亡定量测定法计数法哺乳类细胞固体培养基死亡细胞胸腺细胞 diacetate 化学定量法胞膜

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豚鼠耳蜗外毛细胞的一氧化氮定量分析

中国体视学与图像分析 2002年第4期7卷 244-247页

作者：孙建和李兴启沙淑花 JochenSchach 解放军总医院耳鼻咽喉科研究所北京100853 KresgeHearingResearchInstitute UniversityofMichigaAnnArbor KresgeHearingResearchInstituteUniversityofMichigaAnnArbor

目的:为了观察一氧化氮底物左旋精氨酸(L-arginie)和一氧化氮合酶抑制剂左旋硝基精氨酸甲酯(L-NAME)对豚鼠耳蜗外毛细胞一氧化氮的影响。方法:应用新的荧光染料4,5二氨基乙酰乙酸荧光素(4,5-diaminofluorescein diacetate,DAF-2DA)测定... 详细信息

目的:为了观察一氧化氮底物左旋精氨酸(L-arginie)和一氧化氮合酶抑制剂左旋硝基精氨酸甲酯(L-NAME)对豚鼠耳蜗外毛细胞一氧化氮的影响。方法:应用新的荧光染料4,5二氨基乙酰乙酸荧光素(4,5-diaminofluorescein diacetate,DAF-2DA)测定豚鼠耳蜗外毛细胞内一氧化氮的含量。结果:发现加左旋精氨酸后外毛细胞的荧光灰度值比正常外毛细胞的灰度值升高。而加左旋硝基精氨酸甲酯后,外毛细胞的荧光灰度值比正常外毛细胞的灰度值降低。结论:进一步证明豚鼠耳蜗外毛细胞内存在一氧化氮。

关键词：一氧化氮(NO) 4,5二氨基乙酰乙酸荧光素(4,5-diaminofluorescein diacetate DAF-2DA) 外毛细胞(OHC) 左旋精氨酸(L-arginine) 左旋硝基精氨酸甲酯(NG-monomethyl-L-arginine monoacetate,L-NMMA)

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