简介：

简介：Amicrofluidicsystemwasdevelopedforthesynthesisoftrigonalselenium(t-Se)nanowires,whichwascomposedofaglassmicrochipcoupledwithapoly(methylmethacrylate)(PMMA)microchip.Intheglassmicrochip,amorphousselenium(a-Se)colloidwaspreparedbyreducingseleniousacidwithanexcessamountofhydrazineatatemperatureof100℃.InthecoupledPMMAmicrochip,a-Sewastransformedintomorestablet-Seseedsviasonicationatroomtemperature.Theresidencetimeofthereactantsinbothmicrochipswasoptimizedbyvaryingthedimensionandlengthofthemicrochanneleach.Thet-Senanowireswereformedbyanisotropicgrowthofseleniumcrystalliteduringsonicationandagingundertheassistanceofβ-cyclodextrin(β-CD).Variousstagesofthenanowires'growthwereinvestigated.Theas-synthesizedproductswerecharacterizedbypowderX-Raydiffraction(XRD),Ramanspectroscopy,scanningelectronmicroscopy(SEM),transmissionelectronmicroscopy(TEM)andselected-areaelectrondiffraction(SAED).

简介：AquantummechanicalcalculationwasperformedtostudytheTranslation-Vibration(T-V)energytransferofacolinearOH+O/OD+Osystem,forwhichDelvescoordinatesandR-matrixpropagatationmethodswereappliedtoaMulius-Blintpotentialenergysurface.ThecalculatedresultoftheT-Venergytransferprobabilityshowsstrongoscillationphenomenaandthecollisiondelaytimeofthetitlesystemwasinthe10-15—10-12stimescale.Thekineticisotopeeffectwasdiscussedinthisworktoo.

简介：Areusablecinchonaalkaloidderivativeligand,whichcouldbeeasilysynthesizedbytwosteptransformationwithcheap3,6-dichloropyridazineandquinineasmaterials,wasappliedtohomogeneousasymmetricdihydroxylationofolefinswithNMOasco-oxidantinMe2CO-H20systemandtheproductscouldbeextractedwithEt2Ofromtherecyclablecatalystsystem.80%---93%yieldand51%-99%eehavebeenobtained.Whentrans-stilbenewaschosenasthesubstrateforrecyclingexperiment,88%-92%yieldand>99%eehavebeenobtainedfortenrecycles.

简介：Wehavestudiedtheelectronic,bondingandenergeticcharacteristicsoftheFe-Sibinarysystemusingthetight-bondingextendedHuckelmethod.AmongtheFe-Sibinarycompounds,FeSihasthemostsymmetricgeometricarrangementinthecrystalstructure.Italsopossessesthelargestcohesiveenergyperatom.ThiscorrelatestothefactthatFeSiisthemoststablecongruently-meltingcompoundinthebulkphasediagram.Anestimateofinteractionenergiesbetweendifferentatomsisalsogiven.

简介：ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｄｅｔｅｒｍｉｎａｔｉｏｎｏｆｃｈｌｏｒｏｔｅｔｒａｃｙｃｌｉｎｅ（ＣＴＣ）ｈａｖｅｍａｉｎｌｙｂａｓｅｄｕｐｏｎｃｈｒｏ－ｍａｔｏｇｒａｐｈｉｃ［１］，ｓｐｅｃｔｒｏｐｈｏｔｏｍｅｔｒｙ［２］，ｖｏｌｔａｍｍｅｔｒｙ［...

简介：在油页岩的反击过程期间形成的CaS在表面水质量上有危险影响。有水的反驳说的油页岩的相互作用由于CaS部件与硫的一个高内容产生高度碱的leachate。在与水的接触描述稳固的钙硫化物的行为的一个理论模型被开发。模型与在溶解行为看变化稳固的CaS什么时候留在答案的大小历久不渝。pH的试验性的大小和离子的集中在25点在没有氧的水里被执行吗？

简介：ThecatalyticoxidationofcyclohexenetocyclohexanoneusingPd(OAc)2/HQ/FePcwasinvestigatedinanacidicaqueoussolutionofacetonitrile.TheroleofeachcomponentofthissystemintheoxidationofcyclohexenewasexploredbymeansofUV-VIS,IR,XPSspectroscopyandcyclicvoltammetry,respectively.Basedontheexperimentalresults,themechanismoftheoxidationofcyelohexenecatalyzedbyPd(OAc)2/HQ/FePcwaselucidated.

简介：Inthispaper,itwasdiscoveredthatanovelpH-sensitivecopolymerofN-isopropylacrylamide(NIP)andN-(3-dimethylaminopropyl)methacrylamide(DMAPM)couldbegottenbypolymerization.ThephasetransitionpH(pHtr)ofP(NIP-DMAPM)polymerwasfoundtobe7.4at37℃.ThepolymerwasprecipitatedoutofwateraboveacriticalpH=7.4andre-dissolvedbelowpH----7.4.Thecharacteristicofthispolymermadeitpossibletocarryouttheimmunochemicalstepsofanimmunoassayinatruesolutionandthentoquicklyseparatetheresultingproductfromthereactionmixture.Inacompetitivefluorescenceimmunoassay,thestandardrabbitIgGandrabbitIgGimmobilizedonP(NIP-DMAPM)firstcompetitivelyreactedwiththefluoresceinisothiocyanate(FITC)labeledantibody,thenthepHofsolutionwasadjustedabovethepHtrofpolymertoprecipitatethepolymer-immunecomplex,andthepolymer-immunecomplexprecipitatewasseparatedandre-dissolvedbytheadjustmentofpH,finallytheFITC-labeledantibodyintheimmunecomplexwasquantifiedbyfluorescencemeasurement.ThecalibrationgraphforrabbitIgGwaslinearovertherangeof100-1000ng/mLwithadetectionlimitof11ng/mL.Themethodisrapid,sensitiveandsimple.OwingtoneutralpHtrofP(NIP-DMAPM),thedamagetoantigen-antibodyimmunecomplexwasgreatlydecreasedinthecourseofseparation.Inaddition,asandwichenzyme-linkedfluorescenceimmunoassaymethodforthedeterminationofhumanIgGwasalsodeveloped,showingthatthepH-sensitivephaseseparatingimmunoassaycouldbeperformedinthecompetitivemethodaswellasthesandwichmethod.

简介：Asimplemodelofchromatographicmechanicalmechanismispresent,andthenascricsoftheoreticalchromatographicequationsandfundamentalFormulaearederived.Thesetheoreticalequationsandformulaenotonlyreservethermodynamiccharacteristicsinthecurrentfundamentalchromatographicformulae,butalsointroduceoneormorekineticparameter,soitispossibletomakethemacroscopic-controlontheeffectofkineticcharacteristicsonchromatographicsystem.

简介：Micelles,microemulsions.vesicles,etc.,areorganicmicroheterogeneousmedia.Useofthesemediainanalyticalreactionsfordevelopingnewkinetic-baseddeterminationsorimprovingpreviouslyestablishedkineticmethodshasbeenreported'2.Inrecentyears,amixedmicellarmediumc...

简介：Inthisstudy,etherificationofginkgolideBanddimethylaminoethylchloridehydrochloridewasinvestigatedasamodelreactioninamicro-flowsystem(MFS),providingtheresultingethersinhighyieldwithfewersideeffects.Meanwhile,thisnovelprocessinMFSworkedwellforotherginkgolidesfromGinkgolbilobaandhalides,givingmoderateyields.

简介：Thestrueturaleffectoftheconjugativesystem(C)withcarbonyl-iminobridgeshasbeenstudied.Theresultsshowthat:Intheconjugatedsystem(C),thereisnoelectronicabsorptionpeakattributabletothewholesystem,buttherearethreeπ-π*bandseachntwhichdisplayschacactecisticsofitsownindependently.Theseindicatethatthetwobridges-carbonyl-and-imino-canblockthetlanSmlSSionoftheconjngativepolarizationofthewholesystem,soastoformthreesegments,thisisverifiedbymeansofchemicalsynthesisanddegradation.

简介：Theenergyabsorbedbynorfloxacincouldbetransferredtoterbium(Ⅲ)throughchela-tionofnorfloxacinwithterbium(Ⅲ),thenthecharacteristicfluorescenceemissioncouldbeobserved.Theinteractionofserumalbuminswithnorfloxacinhavebeeninvestigatedinthispaper.TheresultsshowedthatHSAcouldinhibittheenergytransferbetweennorfloxacinandterbium(Ⅲ).But,BSAcouldnot.ItwasshownthatthebindingpropertiesofnorfloxacintoHSAandBSAweretotallydifferent.

简介：Ithasbeenfoundthatthetwo-phasereactionsofaqueousHCl,HOAcorH3PO4withprimaryamineN1923inchloroformareosiclatingreactions.Theirpower-timecurvesweremeasuredbythetitrationmicrocalorimetricmethod,andtheinductionperiod(tin).Thefirstoscillatingperiod(tp.1)andthesecondoscillatingperiod(tp.2)weredetermined.Theapparentactivatingparametersandtheordersoftheoscillatingsystemswerecalculatedandthefollowingrelationshipswereestablished:fortheoscillatingsystemofhydrochloricacid.

简介：试验性的研究被进行探索碱的基本机制降低oil/heavyalkylbenzenesulfonates(HABS)的界面的紧张系统。钠氢氧化物被用作强壮的碱化学药品调查oil/HABS系统的界面的紧张(IFT)。在界面的活动的盐和碱的影响被界面的紧张和分区系数的测量学习。而且，碱/表面活化剂答案被动态激光散布测量。结果与盐相比显示出那，降低界面的紧张并且改进分区系数是的碱的功能更重要。因为增加碱因此微粒的尺寸减少和单音表面活化剂的增加的数字，表面活化剂形成的微粒能是disaggregated，然后，到油/表面活化剂系统和在油水接口的表面活化剂的吸附的接口的更多的表面活化剂分子行动增加，它能导致IFT的减少。

简介：由di-(2,4,4-trimethylpentyl)的L本氨基丙酸的抽取行为phosphinic酸，di-(2,4,4-trimethylpentyl)-monothiophosphinic酸和di-(2-ethylhexyl)磷的酸分别地在二阶段、三阶段的系统被学习。为这些抽取反应的平衡常数是计算的。

简介：Phasebehaviorofbinarysystemofbromobenzene-chlorobenzene(C6H_5Br-C_6H_5Cl)confinedinSBA-15andMCM-41(porediameter8nm,3.8nm,respectively)hasbeeninvestigatedbymeansofdifferentialscanningcalorimetry(DSC).PhasediagramofC_6H_5Br-C_6H_5ClsystemconfinedinSBA-15isatypeofthecompletemisciblebothinliquidandsolidstate,thesamephasebehaviorasthebulksystem.However,thephasediagramcomprisesonlyoneboundaryline,whichisshifteddown22-36Kwithrespecttothebulksystem.C_6H_5Br,C_6H_5ClorthemixturewithinnanoporesofMCM-41isnonfreezing.ThedifferentphasebehaviorofthesystemconfinedinSBA-15andMCM-41isthoughtmainlyduetotherelativesizeofporetomolecule.

简介：Copolymerizationofstyrene(St)andisoprene(IP)wascarriedoutwithacatalystsystemcomposeaofanhydrouslanthanidechloridehexamethylphosphoramidecomplex(LnCl3·HMPA)andaluminumorganiccompound(AOC).Amongthecatalystsexamined,catalystNdCl3·HMPA/AI(i-Bu)3showedahighactivityinthecopolymerizationundercertainconditionsgivingcopolymers(5%—15%Stcontent)withhighcis-1,4microstructureinIPunits(>95%).TheeffectsofHMPA/Ndmolarratio,Al/Ndmolarratio,monomer/Ndmolarratio,Stfeedratio,andthereactiontimeoncopolymerizationwereexaminedwiththiscatalyticsystem.Theobtainedcopolymerswerecharacterizedby^1Hand^13CNMRspectroscopiesandgel-permeationchromatography(GPC).

简介：Variousenolsof2-acylmethyl-4,4-dimethyl-2-oxazolineswerepreparedinmoderateyieldsviaultrasonicallycatalyzedreactionsof2,4,4-trimethyl-2-oxazolinewitharenecarboxylicestersinthepresenceofUDP-t-BuCl-i-Pr2NHsystem.