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IntroductionThemethodofseparatingaracemicmixtureintoitsenantiomersthroughtheformationofdiastereomericmolecularcomplexbyreactionwithanopticallyactivecompoundhasbeenwidelyinvestigated .Fromthepointofviewofcrystallography ,anessentialprerequisiteofthesucc… 相似文献
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用音频关键信息浏览搜索提高了多媒体请求式系统的信息搜索效率。在这一系统里,用来浏览的可听的文摘(关键信息),随相应信息的基础索引同步提供了文本。 相似文献
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IntroductionInthepastdecade ,alotofinteresthasbeencon centratedonpreparingandcharacterizingbridgingmetalcomplexesforinvestigatingtheirpotentiallyusefulelec tronicormagneticproperties .1,2 Recently ,severalmetalcomplexesbridgedbydicarboxylatehavebeensynthes… 相似文献
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以电视接收机中帧偏转的适当调整为基础的行闪烁(边缘闪烁)降低系统可应用于传统的接收机以及以场重复为基础的接收机中。 相似文献
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1 INTRODUCTION As 4,5-diazafluoren-9-one (dafone) is structu- rally similar to phenanthroline (phen), dafone has been used as a chelating reagent in preparing metal complexes. Several dafone-chelating complexes, such as Cu(II)-dafone complexes with an e… 相似文献
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1INTRODUCTIONTheformationofco-crystalsofadiastereo-mericmolecularcomplexisaneffectivemethodforseparatingracemicmixtureintoitsenantiomers[1,2].Asasequeltotheinvestigationonseparatingtheracemicmandelicacidbyachiralalanineinthelaboratory[3],inthepresentworkt… 相似文献