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1.
IntroductionThesol gelprocessprovidesaversatilemethodforthefabricationofinorganicandinorganic organichybridmaterialsviathehydrolysisandcondensationofsuitablemetalalkoxides .1 3Thesematerialspossessnotablead vantagesoverotherinorganic organicmaterialsfort…  相似文献   

2.
Traditionally ,thehydrothermalsynthesisofti taniumsilicalite 1 (TS 1 )needsalargeamountoftetrapropylammoniumhydroxide (TPAOH)asatemplate ( n(TPAOH) n(SiO2 ) =0 4~ 1 0 ) ,andthecrystallizationtimetakes 10~ 30d[1] .Recently ,muchattentionhasbeenpaidtothemodificationofsynthesi…  相似文献   

3.
ASimpleNewMethodfortheFabricationofCarbonPasteMicroelectrodeanditsCharacterizationJianJunSUN;HuiQunFANG;HongYuanCHEN(Departme...  相似文献   

4.
《化学通报》2002,65(3)
[W 0 1 7]可溶性支载体在有机合成中的应用TheApplicationofSolubleSupportinOrganicSynthesis吴茂江 郭红超 # 王 敏 # (固原师范高等专科学校宁夏固原 ;  #中国农业大学应用化学学院 北京 1 0 0 0 94 )介绍了用可溶性聚合物作为支载体进行有机合成、组合合成及支载试剂和催化剂的液相方法。Inthisarticle ,theliquid phasemethodologythatusessolublepolymerassupporttoconductorganics…  相似文献   

5.
利用激光喇曼装置进行毛细管电泳—激光诱导荧光实验   总被引:4,自引:0,他引:4  
细管电泳(electrophoresis,CE)是一种高效、快速的新型分析方法,尤其适合于肽、蛋白质及核苷酸等生理活性大分子的分离。CE通常以内径小于100μm弹性石英管为分离通道,受光程和进样量的限制,常用的紫外吸收检测无法满足低浓度物质检测的需求...  相似文献   

6.
[W 0 49]ω ,ω′ 端羟基脂肪族聚碳酸酯的合成、性质和应用SynthesisPropertyandApplicationofω ,ω′ Hydroxyl endedAliphaticPolycarbonatePolyols刘保华1,2  陈立班2 (1中国科学院化学研究所 北京  1 0 0 0 80 ; 2 中国科学院广州化学研究所 广州  5 1 0 65 0 )综述了ω ,ω′ 端羟基脂肪族聚碳酸酯的合成、性质和应用的研究进展 ,并对其发展进行了展望。ω ,ω′ Hydroxyl endedaliphaticpolycarbonatepo…  相似文献   

7.
Inorganicceramicmembranehasbeenattractedmoreandmoreattentioninthefieldofmembranescienceandtechnologyduetoitsuniquethermal,chemicalandbiologicalstability.Inthelastdecade,alargenumberofpaperswerepublishedonthepreparationandapplicationofceramicmembranes[1,…  相似文献   

8.
Inrecentyears,thestudyontheconversionandapplicationofsolarenergyhasbeenoneofthemostactiveaspectsinthefieldsofnewenergeticsourcedevelopment,thefabricationofnovelsolarenergycellsbecomesthegoalofpeople’sefforts.Inorganicsemiconductivesolarenergycellshave…  相似文献   

9.
催化酯化新进展   总被引:3,自引:0,他引:3  
王乃兴  李纪生 《合成化学》1999,7(3):259-264
酯化是一经典的有机合成反应,随着肽合成的进展,在此领域已做了大量的研究工作,了一析的酯化有机催化剂如:N,N‘-Dicyclohexylearbodiimide,4-dimethylaminopyridine,Bis「4-2,2-dimethyl-1,3-dioxolyl)methy」carbodiimide,benzotriazolylN-oxytrisoimethylamino-phospho  相似文献   

10.
AScopeStudyofCondensationof1,3-DiketoneswithDiethylAcetonedicarboxylateZHONGZhen-qi,TANGHui-tong,ZHANGPang(DepartmentofChemis...  相似文献   

11.
Kinetic model of living ionic polymerization with three active species   总被引:2,自引:0,他引:2  
Livingionicpolymerizationusuallyinvolvesseveralcoexistingspeciesofdifferentreactivities,suchascontactionpairs,solventseparatedionpairsandfreeanions,whichareindynamiceqillibria.Thereactionschemereads[1,2]asscheme1.P-i,M+i+nS ks  kc P-i,Sn,M+t kd  ka P-i+M+i,Sn+Mk…  相似文献   

12.
ChemicalModificationofEVAforDrugReleaseApplicationHUYun-huaandZHUORen-xi(DeparrmentofChemistry,WuhanUniuersity,Wuhan,430072)(...  相似文献   

13.
郭礼伟  高翔  张丹维  吴世晖  吴厚铭 《中国化学》2002,20(11):1430-1433
IntroductionPodophyllotoxin (1)isawellknownnaturalproductendowedwithpotentantineoplasticactivity .1Thesynthe sisandpreparationofdifferenttypesofderivativesofthismoleculehavebeenattractingmuchinterestofbothorgan icchemistsandmedicinalchemists .2 Inthispaper …  相似文献   

14.
IntroductionMicrosomalcytochromeb5(Cytb5)isamemberofcytochromeb5family ,anditservesasanelectroncarrierinaseriesofelectron transferprocessesinbiologicalsys tems .1 3 Cytb5isamembraneproteinwithMr~ 16kDa ,consistingoftwodomains ,onehydrophobicdomainwhichanchorsth…  相似文献   

15.
Theinterfacebetweenhomogeneouscatalysisandheterogeneouscatalysishasgreatscopeforthedevelopmentofnewcatalyticmaterials[1~ 4] .Sup portedaqueous phase (SAP)catalysishasbeenem ployedforthehydroformylationofolefinsundermildconditionswithhighefficiencyandconven…  相似文献   

16.
Theuniquepropertyoftheazobenzenegroupisitscis transisomerizationcausedbybeingirradiatedwithappropriateUVlight(suchas 356nmwhichdependsontheUV Visibleab sorptionofthecompound)andthusmonomericorpolymericliquidcrystalscontainingazoben zenegroupsshow promisef…  相似文献   

17.
BothUVVisspectrophotometryandfluorometryareimportantandeffectivemethodsofspectrometry[1,2].Theyhavebeenplayinganimportantroleinthestudyonthesequenceofbiologicalmolecules,analysisofbiologicalmolecules,andbiologicalmedicineanalysis.Ingeneral,thesensitivityo…  相似文献   

18.
IntroductionManyorganochlorinepesticideswereusedonaglobalscalefromthe 195 0stothemid 80s .Becauseoftheirstabilityand persistenceintheenvironment,theyarefrequentlyreferredtoasthepersistentorgan icpollutants(POPs) [1] .Thesechemicalsarebioaccu mulativeinnature ,ca…  相似文献   

19.
Investigation on False Peak Phenomena in On-line Sweeping Technique in MEKC   总被引:2,自引:0,他引:2  
杨更亮  李保会  王德先  陈义 《中国化学》2002,20(12):1579-1583
IntroductionMicellarelectrokineticchromatography (MEKC)wasinventedtoextendtheutilityofcapillaryelectrophoresis(CE)andpermittedtheseparationandanalysisofneutralcompounds .ButjustlikeothermodesofCE ,MEKCarehamperedbythelowconcentrationsensitivityoftheultra …  相似文献   

20.
Thalliumisatoxicmetal.Becauseitsconcentrationinenvironmentalandbiologicalsam plesisinthe 1ng/grangeorless[1] ,itisdifficulttodeterminethemetalbyusingconventionalelectroanalysismethods .Differentialpulseanodicstrippingvoltammetry(DPASV )isasensitivemethodfor…  相似文献   

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