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500 个结果
  • 简介:KazkeaertefaultzoneisrecognizedasanimportantboundarybetweenPamirandTianshanCenozoicMountainbeltsinthewestofTarimBasin.Itisanactivethrustfaultandcanbedividedintothreesegmentsfromthewesttoeast:Jilekeroutefaultzone,Wuqiaearthquakefaultzone,MushifaultzoneaftergeologicalinvestigatingandmappingalongPamirpiedmont.Basedonthefaultedlandformaswellasdeformationanddisplacementofyoungdepositlayers,theslipratesofKazkeaertefaultzonesincethelateQuaternaryarebrieflystudied.Theresultshowsthattheaveragesliprateoffaultisdifferentiatealongdifferentsegments.

  • 标签: Kazkeaerte FAULT ZONE Scarp ACTIVE FAULT
  • 简介:研究证明了许多化学成分由哌啶碱统治了,flavonoids例如lobelanidine,洛贝林,和lobelanine,从山梗莱属的植物chinensis愁相被获得了。试验性的研究和临床的应用也显示了那L。chinensis拥有很多项药理学活动(例如,利尿剂,choleretic,呼吸兴奋,反毒液,抗菌剂,和anticancer)。这篇论文集中于L的性质,化学成分,和anticancer活动。chinensis将在他们之中澄清连接,并且识别活跃anticancer混合物。这个工作为L的进一步的研究和开发用作基础。chinensis。

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  • 简介:Tostudytheeffectofthesugarchainsinglycoalkaloidsagainstcancercells,6-O-sulfatedsolamargineandacid-catalyzedhydrolyticproductsofα-solamargineandα-solasoninewereprepared.ThesulfationatO-6ofsolamarginewasproceededinfivesteps.The6-OHgroupwasfirstselectivelyprotectedwithDMT-Cl,andthenthesecondaryhydroxylgroupsonthesugarringwereacetylated.AftertheprotectivegroupDMTrwasremoved,thefree6-OHgroupwassulfated.Finally,theacetylgroupswereremovedtogive6-O-sulfatedsolamargineinagoodyield.Thehydrolysesofsolamargineandsolasoninewereperformedindilutedhydrogenchlorede.Threeandtwohydrolyzedproductswereobtainedfromsolamargineandsolasonine,respectively.TheantiproliferativeactivitiesagainstHCT-8tumorcellsoftwoglycoalkaloidsandtheirderivatieswereexaminedviaaMTTassay.Theresultsshowthatα-solamargineandα-solasonineexhibitstrongcytotoxicactivitieswithanIC50of10.63and11.97μmol/L,respectively,wherastheirderivatiesseemtobelessactivities.

  • 标签: 配糖生物碱 糖链修饰 抗癌活性变化 硫酸盐化作用 酸解
  • 简介:Englishwritingisgainingattentionandemphasisinourcol-legesyllabus,havinganimportantroletoplayinlearningandcommunication.However,ofthefourskills(speaking,reading,writingandlistening),itremainsthemostdifficult.Traditionalmethodsofteachingwritinghaveundoubtedlycon-tributedtotheimprovementofthelearner’swritingskillsandstrategies.Butnewmethodsandactivitiesareneededtomaxi-mizetheefficiencyoftraditionalmethodsandkeepstudentsin-terestedinthiscourse.Thispaperisastep-by-stepdescriptionofanactivityusedinawritingcourseforEnglishmajors,whichcombinesspeakingwithwritingandmakesthewritingtaskac-quirerealcommunicativeneeds.Toputitplainly,thestudentsareaskedtointerviewanEnglishteacherandthenwriteareportbasedontheinformationobtainedfromtheinterview.

  • 标签: 内口
  • 简介:IllustrationAllthedatainthiscatalogarechosenfromthe(PreliminarySeismologicalReportofChineseSeismicStations((Itsabbreviationis(MonthlyReport().ThecatalogincludestheeventsofM(4.7inandnearChinaandM(6allovertheworld.The(MonthlyReport(ismonthlycompiledbytheNinthSectionofInstituteofGeophysics,CSB.Theorigintimesofearthquakesinthecatalogadoptcoordinateduniversaltime(UTC)inaccordancewithinternationalconvention.Thelocationofeveryepicenterisexpressedbyitslatitudeandlongitude,atthesametimebythecorrespondinggeographicalregionproposedbyFlinnandEngdahl.Theregionalnamesareonlyforreferencesanddonotimplyanypoliticalsignificance.Thenumberofstationsusedandstandarddeviationarealsogiveninordertoillustratetheprecisionoflocation.

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  • 简介:StrongearthquakeactivityalovertheworldandstrongmoderateearthquakeactivitywithinandnearChina(April,1997~May,1997)PEISHANCHEN...

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  • 简介:  Illustration  Allthedatainthiscatalogarechosenfromthe″PreliminarySeismologicalReportofChi-neseSeismicStations″(Itsabbreviationis″MonthlyReport″).ThecatalogincludestheeventsofM≥4.7inandnearChinaandM≥6allovertheworld.The″MonthlyReport″ismonthlycompiledbytheNinthSectionofInstituteofGeophysics,CSB.  ……

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  • 简介:IlustrationAlthedatainthiscataloguearechosenfromthe″PreliminarySeismologicalReportofChineseSeismicStations″(It′sabbreviation...

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  • 简介:StrongearthquakeactivityalovertheworldandstrongmoderateearthquakeactivitywithinandnearChina(June,1996~August,1996)PEISHANCH...

  • 标签: China
  • 简介:调查的目的在里面vitro抗氧化剂活动和methanolic叶的全部的酉分的内容Nyctanthesarbor-tristisL提取。(NA)。样品在vitro抗氧化剂方法用五被测试的方法(1,1-diphenyl-2-picryl肼基清除活动(DPPH),氢氧根激进清除的活动(-OH),氮的氧化物清除活动(没有),superoxide激进清除的活动,并且总计抗氧化剂活动)评估在里面NA和全部的酉分的内容(Folin-Ciocalteu方法)的vitro抗氧化剂潜力。摘录看好免费激进的清除性质哪个作为IC50价值计算。methanolic摘录的结果IC50(半最大的禁止的集中)被发现是57.93?g牴慥整?慲獴愠?潢桴搠獯獥

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  • 简介:Theshapeofnanostructurehasimportanteffectsontheirproperties,thereforeinthisstudy,wehavepreparedandcharacterizedthreedifferentmorphologiesofWO3nanostructuresi.e.nanorod,nanosphereandnanoplateforsurveyingshapeeffectontheirphotocatalyticpropertiestowarddegradationofRhodamineB(RhB)dye.ObtainedresultsshowthatnanoplateWO3incomparisonwithothershasthebestphotocatalyticactivity.AccordingtoSEM,andphotocatalyticdegradationresults,thereasonforthisbehavioristhesharpedgesandcornersofWO3nanoplates.Becauseoftheirlowcoordinationnumber,atomslocatedintheedgesandcornersoftheWO3nanoplateshavemoreactivity,adsorbmoreRhBandthereforegivemorephotocatalyticactivitytotheWO3nanoplates.UsingofdifferentscavengersshowedthathydroxylradicalsaremainlyresponsibleforphotocatalyticactivityofWO3nanoplatesandnanospheresbutforWO3nanorods,superoxideradicalsarethemainphotocatalyticdegradationagents.

  • 标签: 光催化活性 纳米结构 光催化降解性能 形态 罗丹明B 形状效应