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IntroductionThealkalihalidediatomicmoleculesprovideatypicalcurvecrosingproblem[1].Theoutstandingnonadiabaticbehaviorofthechem... 相似文献
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XIAN Mo YAN Ji chang CHENG Tie xin KANG Yi jian LI Wen xing BI Ying li ZHEN Kai ji ** . College of Chemistry Jilin University Changchun P. R. China . College of Chemistry Northeast Normal University C 《高等学校化学研究》2002,18(3):303-306
IntroductionThe biosynthesis of unsaturated fatty acidshasattracted more attention in recent years. Forexample,linoleic and linolenic acids are importantmaterials for pharmaceutical and food industries.Besides,they can be used to synthesize paint,printing ink and surfactant,etc. A number ofmicroorganisms have been studied as potentialcommercial sources to produce unsaturated fattyacids[1] .Agricultural and industrial products,by-products,etc. have been employed in thecultivation of those orga… 相似文献
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以芹菜素为起始原料,在C-5、C-6、C-7、C-4′位置上引入甲基、苄基、乙酰基、对甲苯磺酰基、三异丙基硅烷基等多种单元结构基团,合成了16个芹菜素衍生物,采用CCK-8的方法考察了所合成化合物对人肝癌细胞(Hep3β)、人结肠癌细胞(LOVO)、人肺癌细胞(A549)的抑制作用。结果显示,经过化学修饰后的部分化合物比芹菜素有更强的抗肿瘤活性,其中化合物13对人肺癌细胞(A549)的抑制率超过了顺铂,值得进一步探讨和研究。 相似文献
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Study of Static Adsorption Capacity of ACF for Xenon at 201 K 总被引:2,自引:0,他引:2
WANG Ya long ** ZHANG Hai tao WANG Xu hui ZHANG Li xing CHEN Li yun XIE Jin chuan 《高等学校化学研究》2002,18(2):216-220
IntroductionTheradioxenonsarenuclearfissionproducts .AccordingtotheComprehensiveNuclear Test BanTreaty (CTBT) ,thenucleareventswhichviolatethetreatymaybefoundbymonitoringradioxenonsinglobalatmospherewithInternationalMonitoringSys tem(IMS) .However ,allxenons… 相似文献
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IntroductionSeveralacyclicchiralinsectpheromonesarecharacterizedbyopticallyactiveerythro-methylalkanol.TypicalexamplesarethepheromoneofantTetramoriumimpurm(1a)andthetrailpheromoneofantLeptogenysdiminuta(1b).In1981,Pasteelsetal.[1]isolated4-methyl-3-h… 相似文献
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IntroductionTherehasbeenanincreasedinterestinthethermodynamicbehaviorofternarymixtures(water+nonaqueoussolvent+electrolyte)[1].However,therehasbeenashortageofinvestigationsonsuchmixtures,especiallyonaromaticsolutesthatcontainthesubstituent.Littleiskn… 相似文献
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