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1.
IntroductionTriazenereagentsareinterestingbecauseoftheirstrongcomplexationabilitieswithtransitionmetals .1 6However,littledecolorationofthemcatalyzedbysilverionhasbeenstudiedinanalyticalchemistry .Manyanal ysistshavereportedtheuseofcatalyticreactionsfort…  相似文献   

2.
FECS ,theFederationofEuropeanChemicalSoci eties,comprisesanumberofDivisionsandWorkingPar tiesspecializingincertainfieldssuchasFoodChem istry ,ElectrochemistryorChemicalEducation .AmongthemtheDivisionofAnalyticalChemistry ,DAC ,isoneofthelargestwithrespectto…  相似文献   

3.
Intruduction  Thedevelopmentofnucleosideprodrugscapableofundergoingintracellularactivationtothecorrespondingnucleotidehasbecomeanareaofintenseinterest.1Sever alpurineandpyrimidinebasesandnucleosideanalogsareimportantweaponsintheanticancerandantiviralc…  相似文献   

4.
杨一飞  穆绍林 《中国化学》2002,20(6):583-590
IntroductionThediscoveryoftheconductivityofpolyacetylenehasopenedanewresearchfieldforthesynthesisofnewmaterials .Conductingpolymerscanbesynthesizedbythechemicalpolymerizationandelectrochemicalpolymeriza tion .1 7Theelectrochemicalpolymerizationprovidesas…  相似文献   

5.
林鹏  郑洪  朱庆枝  许金钩 《中国化学》2002,20(9):872-877
IntroductionThechemicalpropertiesofrare earthelementsareverysimilar ,consequently ,itisdifficulttodetectanin dividualionintheirmixturesowingtotheinterferenceofotherrare earthelements .Duetoahighersensitivityandselectivity ,fluorimetricmethodsofrare earthel…  相似文献   

6.
Beingthemostessentialchemicalmaterialinlivingorganisms,theDNAinviralcapsids,bacterialnucleoids,andchromosomesofhigherorganismsonlyoccupies104—106timeslessvolumethanitdoeswhenexistsasextendeddoublehelixstructures.Tounderstandhowthegeneticinformationstoredi…  相似文献   

7.
StructureofPotassiumofUndecatungstomononickelosilicateQuLun-Yu;MaRong-Hua;ChenYa-Guang(DepartmentofChemistry,NortheastNormalU...  相似文献   

8.
Recently,muchattentionhasbeenpaidto4,9dihydroxy3,10perylenequinonoidphotosensitizers(PQP)[1].Theypossesslotsofexcellentproperties,suchaseasilybeingpurified,largeconcentrationtolerance,highquantumyieldof1O2,highthermalstability,etc.Inaddition,theyshowtheabilityo…  相似文献   

9.
ExtensivestudiesofradiationorchemicalinjuryofbiologicaltargetmoleculesdemonstratethatOHradical,themostreactiveoxygenspecies,reactswithbiologicalmacromolecules,suchasDNA,inducingbasealterations,basicsites,andstrandbreaks,resultedinvariouspathogenesis,such…  相似文献   

10.
苗志伟  付华  冯玉萍  韩波  涂光忠  赵玉芬 《中国化学》2002,20(11):1434-1438
IntroductionNucleosidesandtheiranaloguesaspotentialanti cancerandantivirusagentshavebeenstudiedextensively .Mostofthecurrentlylicensedantiviraldrugsandmanyofthedrugsusedinanticancerchemotherapyarenucleosideanalogues .1Forthemajorityoftheseanaloguesshown…  相似文献   

11.
IntroductionItisgenerallyacceptedtodaythattherearethreekindsofbindingmodelsforsmallmoleculestoDNA ,whichrefertointercalativebinding ,groovebindingandelectrostaticbinding .Inthesebindingmodels ,theinter calativebindingisthoughtastobethestrongestbindingbec…  相似文献   

12.
Organicperoxidesaretheintermediateproductsintheoxidationofhydrocarboncompounds(HC).MethaneisthemostabundantHCintheatmosphere,anditsconcentrationisstillincreasingattherateof0.8%annually.Hence,theoxidationofCH4maybeanimportantsourceoforganicperoxides.However…  相似文献   

13.
赵生敏  王梅祥 《中国化学》2002,20(11):1291-1299
IntroductionBiotransformationsofnitriles ,eitherthroughanitri lase catalyzeddirectconversiontothecarboxylicacidsorviaanitrilehydratase catalyzedhydrationtotheamidesfollowedbythehydrolysistotheacidsmediatedbyanamidase ,haveprovidedausefulandenvironmental…  相似文献   

14.
IntroductionMaterialsbasedoncobaltoxideshaveattractedagreatinterestinviewoftheirpotentialapplicationsinscientificandtechnologicalfields .1Theyhavebeenusedfortheproductionofsolid statesensors ,2 heterogeneouscatalysts ,3electrochromicdevices (ECDs) 4andasinte…  相似文献   

15.
Inrecentyears,thestudyontheconversionandapplicationofsolarenergyhasbeenoneofthemostactiveaspectsinthefieldsofnewenergeticsourcedevelopment,thefabricationofnovelsolarenergycellsbecomesthegoalofpeople’sefforts.Inorganicsemiconductivesolarenergycellshave…  相似文献   

16.
IntroductionChlordiazepoxide (7 chloro 2 methylamino 5 phenyl 3H 1,4 benzodiazepine 4 oxide)showingpowerfulan tianxietyeffecthasbeenwidelyusedasapsychotherapeu ticdrug .Consequently ,theneedaroseforsensitiveandrapiddeterminationofchlordiazepoxideinblood ,urinean…  相似文献   

17.
IntroductionAmongtheinteractionsbetweenporphyrinsandfunctionalmoleculessuchasaminoacids ,ubiquinoneplaysimportantbiologicalfunctions .Themolecularrecognitionofaminoacidsandtheirderivativesisanimportanttopicforbothunderstandingthemechanismofaminoacyl tr…  相似文献   

18.
Glycoproteinsareknowntobeanimportantgroupoffunctionalmacromoleculesinbiologicalsystems,butitismoredifficulttoanalyzethemthannormalproteins.Themostseriousproblemliesintheanalysisoftheirmicroheterogeneitywhichisaspecialphenomenonofglycoconjugates.Differ…  相似文献   

19.
Studiesonkineticsofradicalreactions[1]andonCHbonddissociationenergies(BDE)[2]haveshownthatcarbonradicalsarestabilizedbyeitheranelectrondonatinggroup(EDG)oranelectronwithdrawinggroup(EWG),andthatifacarbonradicalissubstitutedwithbothanEDGandanEWGatthesamecen…  相似文献   

20.
Metaloxidesareonekindofmaterialofimportantapplications[1,2].Fortheclustermodelingofmetaloxideswithquantumchemicalmethods,thewaysgointothreegroups[3,4],i.e.thebareclustermodel,thesaturatedclustermodelandtheembeddedclustermodel.Thebareclustermodelissimplyasmal…  相似文献   

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