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简介：Thereactionsofimidatesincludingcyclicimidates,oxazolinesanddihydrooxazinewithphenoxyacetylchloride,wereinvestigated.TheresultsindicatethatdiacylamideoracylamidewasgeneratedfromN-phenoxyacetylatedimidates,whilecyclicimidateoxazolinesunderwentaring-openingreactiontoyielddifferentamidesdependingonthereactionconditions.Evenundernon-nucleophilicconditions,noβ-lactam-fusedoxazolinederivativewasobtained.

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简介：TheunimolccularreactionsofammoniaoxideH3NO,isomerizationanddehydrogenation,areinvestigatedbyabinitioMOcalculationswiththe4-31Gbasisset.Thegeometriesandenergiesofthereactant,transitionstatesandproductshavebeendeterminedonthesingletpotentialenergysur-face.Thereactionergodographyalongtheintrinsicreactioncoordinate（IRC）forthetworeactionshavebeenperformed.ThevibrationalfrequencycorrelationdiagramofthetworeactionsareanalyzedalongtheIRC.

简介：在量以内分子的动力学(QMD)模型，动态octupole变丑在重离子的熔化反应的来临的过程作为在射弹和目标之间的中央距离的功能被学习。事件精力上的最大的动态octupole变丑的依赖也被调查。动态octupole变丑能在来临的过程期间被观察，并且最大的动态octupole变丑与减少的事件精力变得更重要。在射弹和目标的质子和中子中心的分布也分别地被调查。在重离子的熔化反应的来临的过程，因为强壮的库仑潜力，在二个原子核的质子中心之间的分离在中子中心之间比那大。

简介：Difluorocarbenegeneratedfromthedecompositionoffluorosulfonyldifluoroaceticacid(2)reactedwithvarioussodiumsaltsofN-heterocycliccompounds(1)givingthecorrespondingdifluoro-methylatedproductsinacetonitrileat10—40℃.Benzotriazole(1a),benzimidazole(1b)andimidazole(1c)wereconvertedinto1-(difluoromethyl)benzotriazole(3a),1-(difluoromethyl)benzimidazole(3b)and1-(difluoromethyl)imidazole(3c)respectively.Indole(1d)reactedwith2togive-(fluorosulfonyldifluoro-acetate)indole(2d)ratherthantheexpecteddifluoromethylatedderivatives.

简介：ＥｎｔｈａｌｐｙｏｆＲｅａｃｔｉｏｎｓｉｎＹ－Ｂａ－Ｃｕ－ＯＳｙｓｔｅｍＳｈａＷｅｉ沙维（Ｄｅｐａｒｔｍｅｎｔｏｆ．ＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅａｎｄＭｅｔａｌｌｕｒｇｙ，ＵｎｉｖｅｒｓｉｔｙｏｆＣａｍｂｒｉｄｇｅ．Ｕ．Ｋ．）Ｒｅｃｅｉｖｅｄ１７...

简介：在在精力的反应关上到库仑障碍的multinucleon转移的主要进步被考察。在试验性的进步和理论进步的一个短演讲以后，为未知充满中子的重原子核和trans铀原子核的预言的生产十字节被介绍。

简介：Theaimofthisarticleistostudytheeffectivebehaviorofthesolutionofanonlinearproblemarisinginthemodellingofenzymecatalyzedreactionsthroughtheexteriorofadomaincontainingperiodicallydistributedreactivesolidobstacles,withperiodε.Theasymptoticbehaviorofthesolutionofsuchaproblemisgovernedbyanewellipticboundary-valueproblem,withanextrazero-ordertermthatcapturestheeffectoftheenzymaticreactions.

简介：ＱｕａｎｔｕｍＭｏｌｅｃｕｌａｒＤｙｎａｍｉｃｓＡｐｐｒｏａｃｈｆｏｒＬｏｗＥｎｅｒｇｙＨｅａｖｙＩｏｎＲｅａｃｔｉｏｎｓ￥ＷｅｉＺｈｉｙｏｎｇａｎｄＺｈｕＹｏｎｇｔａｉＦｒａｇｍｅｎｔａｔｉｏｎｉｎｔｈｅｈｅａｖｙｉｏｎｒｅａｃｔ...

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简介：Animidazolemodifiedsilverelectrodeispreparedbyimmersingthesubstratesilverelectrodeina2%imidazolesolutionofethanolat50℃for10min.Themodifiedelectrodeisthensweptinacytochromecsolutionandthemodifiedlayertakesoffbecausethemodifiedelectrodeisveryunstable.Althoughtheamountofthesilver-imidazolecomplexisverysmallcomparedwiththeamountofcytochromecintheproteinsolution,itgreatlyfacilitatesredoxreactionsinvolvingthebiomacromolecules.

简介：Bis(β-alkoxy-ethylcyclopentadienyl)titanium(zirconium)dichlorideswasnewlysynthe-sized,andthroughinterfacialpolycondensationofbis(β-alkoxy-ethylcyclopentadienyl)titaniumdichlorideswithdiacids,diphenols,andhydroxy-acids,aseriesofnewtitaniumpolymerswereprepared.Thepolymersobtainedareyellowincolor,havingmol.wtsbetween10^3-10^6.Theypossessheat-resistantpropertiesandshowbettersolubilitiesthatCarraher′sseries.Thus,TG/DTGdeterminationsshowedthatwhilesufferinginitiallossofwts.ataround260℃-470℃,theyremainstableat600-800℃.Residualwts.arearound50%oftheinitialat947.5℃.Theyaresolubleinglacialaceticacid,DMAC,DMF,andDMSO.

简介：Morelocalizedenergydepositionisabletobeproducedinantiproton-nucleuscollisionsincomparisonwithheavy-ioncollisionsduetoannihilationreactions.Searchingforthecoldquark-gluonplasma(QGP)withantiprotonbeamshasbeenconsideredasahottopicbothinexperimentsandinthereticalcalculationsoverthepastseveraldecades.Strangenessproductionandhypernucleusformationinantiproton-inducednuclearreactionsareimportanceinexploringthehyperon(antihyperon)-nucleon(HN)potentialandtheantinucleon-nucleoninteraction,whichhavebeenhottopicsintheforthcomingexperimentsatPANDAinGermany.

简介：Carbonsupportedgold-iridiumcomposite(AuIr/C)wassynthesizedbyafacileone-stepprocessandwasinvestigatedasthebifunctionalcatalystforoxygenreductionreaction(ORR)andoxygenevolutionreaction(OER).ThephysicalpropertiesoftheAuIr/Ccompositewerecharacterizedbytransmissionelectronmicroscopy(TEM),X-raydiffraction(XRD)andX-rayphotoelectronspectroscopy(XPS).AlthoughtheAuandIrintheAuIr/Cdidnotformalloy,itisclearthattheintroductionofIrdecreasestheaverageAuparticlesizeto4.2nmcomparedtothatintheAu/C(10.1nm).BysystematicalanalysisonchemicalstateofmetalsurfaceviaXPSandtheelectrochemicalresults,itwasfoundthattheAusurfacefortheAu/Ccanbeactivatedbypotentialcyclingfrom0.12Vto1.72V,resultingintheincreasedsurfaceroughnessofAu,thusimprovingtheORRactivity.Bythesamepotentialcycling,theIrsurfaceoftheIr/Cwasirreversiblyoxidized,leadingtodegradedORRactivitybutuninfluencedOERactivity.FortheAuIr/C,IrprotectsAuagainstbeingoxidizedduetothelowerelectronegativityofIr.CombiningtheadvantagesofAuandIrincatalyzingORRandOER,theAuIr/CcatalystdisplaysanenhancedcatalyticactivitytotheORRandacomparableOERactivity.Inthe50-cycleacceleratedagingtestfortheORRandOER,theAuIr/Cdisplayedasatisfiedstability,suggestingthattheAuIr/Ccatalystisapotentialbifunctionalcatalystfortheoxygenelectrode.

简介：TheauthorshavestudiedtheDiels-Alderreactionsbetweenfuranderivativesandmaleimidederivativesinanionicliquidandhavefoundthathigherreactivitycanbeobtainedinaproticionicliquid[Mim]Tf2Nthanintheconventionalorganicsolvent.Furthermore,intheDiels-Alderreactionsof2-and2,5-alkylfuranswithN-alkylma-leimide,thereactivityincreasesbyextendingthealkylchainlengthofN-alkylmaleimide.Inaddition,itwasdemon-stratedthatendo-selectivityincreaseswhen2,5-disubstitutedfuransareused.TheseresultswillbeexplainedbycomparingthestabilityoftheDiels-Alderadductwiththatoftheproductsobtainedfromthereactionsof2-substitutedfuransand2,5-disubstitutedfurans.更多还原

简介：AReviewwith56referencesonthereactionbetweenboricacidandpolyhydroxycompounds,andthedevelopmentsofboron-selectiveresins.

简介：AconvenientprocedureforthepreparationofsomenewgermasesquioxidescontainingphosphonylgroupscarriedbyanintramolecularcatalyticMannich-typereactionisreported.

简介：ＴｈｅａｎｏｍａｌｏｕｓｒｅａｃｔｉｏｎｓｏｆｔｈｅｇｅｏｍａｇｎｅｔｉｃｈｏｒｉｚｏｎｔａｌｆｉｅｌｄｔｒａｎｓｆｅｒｆｕｎｃｔｉｏｎｓｂｅｆｏｒｅＴａｎｇｓｈａｎｅａｒｔｈｑｕａｋｅＳＨＡＯＪＩＮＧＧＯＮＧ（龚绍京）ＨＵＡＲＡＮＣＨＥＮ（...