简介：ＳＴＵＤＹ　ＯＮ　ＴＨＥ　ＲＥＬＡＴＩＯＮＳＨＩＰ　ＢＥＴＷＥＥＮ　ＭＥＬＴＩＮＧ　ＰＯＩＮＴ　ＡＮＤ　ＡＣＩＤ　ＤＥＮＡＴＵＲＩＮＧ　ＡＣＩＤＩＴＹ　ＯＦ　ＤＮＡ　ＢＹ　ＵＬＴＲＡＶＩＯＬＥＴ　ＳＰＥＣＴＲＯＭＥＴＥＲＳＴＵＤＹＯＮＴＨＥＲＥＬＡＴ...

简介：ZrO2nanopowdersbasedstearicacidphasechangematerials(PCMs)werepreparedbyhigh-energymilling.Theconceptofheatcapacityfactor(HCF)wasusedtoanalyzethethermalpropertiesofthematerials.TheheatstoragepropertyofPCMs,containingthesamecontentofstearicacid(23%bymass)inthestartingmaterialsbutsynthesizedbydifferenttechnicalprocesses,wasinvestigatedbyusingHCF.Itwasfoundthattherewerevastinfluencesofdifferentdispersantsontheheatcapacity.Thesamplespreparedwithchloroformprovidedthebestheatstorageabilityinallsamplestested.

简介：InthispaperweprovethataclassoftrustregionmethodspresentedinpartⅠissuperlinearlyconvergent.Numericaltestsarereportedthereafter.Resultsbysolvingasetoftypicalproblemsselectedfromliteratureshavedemonstratedthatouralgorithmiseffective.

简介：Adirectsynthesisofmethyllevulinatefromcellulosealcoholysisinmethanolmediumundermildcondition(180210C)catalyzedbyextremelylowconcentrationsulfuricacid(0.01mol/L)andtheproductisolationweredevelopedinthisstudy.Effectsofdifferentprocessvariablestowardsthecatalyticperformancewereperformedasafunctionofreactiontime.Theresultsindicatedthatsulfuricacidconcentration,temperatureandinitialcelluloseconcentrationhadsignificanteffectsonthesynthesisofmethyllevulinate.Anoptimizedyieldofaround50%wasachievedat210Cfor120minwithsulfuricacidconcentrationof0.01mol/Landinitialcelluloseconcentrationbelow100g/L.Theresultingproductmixturewasisolatedbyadistillationtechniquethatcombinesanatmosphericdistillationwithavacuumdistillationwheren-dodecanewasaddedtohelpdistilltheheavyfraction.Thelightfractionincludingmainlymethanolcouldbereusedasthereactionmediumwithoutanysubstantialchangeintheyieldofmethyllevulinate.ThechemicalcompositionandstructuraloflowerheavyfractionwerecharacterizedbyGC/MS,FTIR,1H-NMRand13C-NMRtechniques.Methyllevulinatewasfoundtobeamajoringredientoflowerheavyfractionwiththecontentover96%.Thispathwayisefficient,environmentallybenignandeconomicalfortheproductionofpurelevulinateestersfromcellulose.

简介：由包含微生物引起的整个房间的催化剂的RhodococcuserythropolisAJ270，nitrilehydratase和amidase催化，在10点

简介：ＰＲＥＰＡＲＡＴＩＯＮＯＦＮ－ｔ－ＢＵＴＹＬＯＸＹＣＡＲＢＯＮＹＬ－Ｏ￣α－９－ＦＬＵＯＲＥＮＹＬＭＥＴＨＹＬＥＳＴＥＲＯＦＡＳＰＡＲＴＩＣＡＣＩＤ￥ＺｏｎｇＪｉｎＨＡＮ；ＺｈｅｎＫａｉＤＩＮＧａｎｄＱｉＫａｉＺＨＡＮＧ（ＢｅｉｊｉｎｇＩｎｓｔｉｔｕ...

简介：Quinolinederivativeswereefficientlypreparedthroughacid-catalyzedFriedlanderreactioninionicliquid([bmim][BF4]).Itisshownthattheproposedmethodisoperationallysimpleandenvironmentallybenigninthatthereactionmediaandthecatalystcanberecoveredandbereusedeffectivelyforatleastfourtimes.

简介：ＳｕｒｆａｃｅＡｃｉｄｉｃＰｒｏｐｅｒｔｉｅｓｏｆＬｏａｄｅｄＨｅｔｅｒｏｐｏｌｙＡｃｉｄａｎｄＰｒｅｐａｒａｔｉｏｎｏｆＤｉｍｅｔｈｙｌｅｔｈｅｒｂｙＣａｔａｌｙｚｅｄＤｅｈｙｄｒａｔｉｏｎｏｆＭｅｔｈｙｌＡｌｃｏｈｏｌ＊ＨＵＡＲｕｉ－ｎｉａｎ，Ｗ...

简介：Aseriesof5-aminolevulinicacidanditsalkylestermethanesulfonateswasexploitedtophotodynamictherapy(PDT)ofhumanlymphocyticcells,U-937invitro.ThePDTefficiencyisinfluencedbytheconcentrationandincubationtime.Generally,forALAanditsalkylestermethanesulfonates,thecellsurvivalratedecreasesandtheaccumulationabilityofPpIXincreaseswiththeconcentrationandincubationtime.Wefoundthatthelongercarbonchainmethanesulfonates(C5-S,C6-S,C8-S)exhibitbetterPDTeffectthanALAmethanesulfonate.ThispossiblyprovidesapromisingroutetotheclinicalapplicationofPpIX-mediatedPDTtocancercell.

简介：4,4-Dialkyl-2-oxazolin-5-onesarepreparedbyonestepreactionof2-oxazolin-5-onewiththemagnesiummethylcarbonate(MMC)andalkyIhalides.Itisanovelandconvenientmethodforsynthesisofα,Υ-disubstitutcdα-aminoacidbyhydrolysisof4,4-dialkyl-2-oxazolin-5-ones.

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简介：ThedynamiccompetititveadsorptionbehaviorsofdifferentbinaryorganicvapormixturesonACF-Psunderdifferentoperationconditonswereinvestigatedbygaschromatographyinthispaper,Thestudiedmixtruesincludedbenzene/toluene,toluene/xylene,benzene/isopropylbenzeneethlyacetate/tolueneandbenzene/ethylacetate.ExperimentalresultsshowthatvariousACF-Ps,aswithACF-W,canremovebothvaporsinbinaryvapormixtureswithover99%ofremovalefficiencybeforethebreakthroughpointofthemoreweaklyadsorbedvapor,Indynamiccompetitiveadsorption,themoreweaklyweakleadsorbedvapornoeonlypenetratesearly,butalsowillbedisplacedanddesorbedconsequentlybystrongeradsorbateandthereforeproducesarollingupinthebreakthroughcurve,TheACF-Pspreparedatdifferenttemperatuershavesomewhatdifferentadsorptionselectivity,Thefeedconcentrationratioofvapros,thelength/diameterratioandthethickofbedhaveeffectoncompetitiveadsorption.Thecompetitiveadsorptionabilityofavaporismainlyrelatedtoitsboilingpoint.Usually,thehighertheboilingpoint,thestrongerthevaporadsorbedonACF-P.

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简介：Carbonsurfacewithlargeoxygenandcarbonratio(O/C)indicatedanoutstandingelectro-catalyticactivitytowardL-ascorbicacidoxidation,comparedtoplatinumgroupmetals.However,interrelationofsurfacefunctionalgroupsanditselectro-catalyticactivityisstillunclear.Inthispaper,weprepareddifferentlevelsofoxidizedcarbonsbyasimpleacidtreatmentandinvestigatedthecorrelationbetweenthesurfaceoxygenfunctionalgroupsofacid-treatedcarbonandelectro-catalyticactivityinanelectrooxidationofL-ascorbicacid.Positivelychargedcarbonwasdemonstratedbylonepairelectronofoxygenfromvalencebandspectrastudy.Itwasrevealedthatthepositivelychargedcarbon,especiallyinvolvedincarbonyl,showedenhancedtheelectro-catalyticactivitythroughbothbetteradsorptionofnegativelychargedreactantsandloweredLUMObyelectronegativityofoxygen.

简介：变形癌症房间的俘获和察觉为恶意的瘤的诊断和治疗是关键的。这里，我们报导folic酸(FA)的使用poly修改了electrospun(乙烯基白酒)(PVA)为癌症房间俘获应用的/polyethyleneimine(PEI)nanofibers。由glutaraldehyde蒸汽的ElectrospunPVA/PEInanofiberscrosslinked与FA被修改经由一poly(乙烯乙二醇)(木钉)分隔符，由纤维表面PEI胺的acetylation列在后面。形成的修改FA的nanofibers很好被描绘。electrospunPVA/PEInanofibers的形态学尽管有表面修正光滑、一致。另外，修改FA的nanofibers显示由溶血证实了的好hemocompatibility试金。重要地，发达修改FA的nanofibers能明确地捕获癌症房间overexpressingFA受体，它被数试金和质的共焦的显微镜学分析的量的房间验证。发达修改FA的PVA/PEInanofibers可以被用于为癌症诊断应用程序捕获传播肿瘤房间。

简介：AsimplemethodfortheoxidativearomatizationofHantzsch1,4-dihydropyridinestothecorrespondingpyridinesisachievedbyusinghydrogenperoxideasgreenoxidantandaceticacidascatalystinaqueoussolution.

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简介：Graphitic碳氮化物(g-C3有向在可见轻照耀下面的4-nitrophenol的降级的高photocatalytic活动的N4)被蚀刻的HCl准备由氨中立化列在后面。准备样品的结构，形态学，表面区域，和photocatalytic性质被学习。在处理以后，g-C3N4从几测微计减少了到几百纳米，和g-C3N4从11.5 增加了；m2/g到115 ；m2/g。同时，g-C3N4显著地在可见的光下面向4-nitrophenol的降级在处理以后被改进照耀。小粒子g-C3N4是5.7次体积g-C3为水处理和环境补习为未来应用使它成为有希望的可见轻光催化剂的N4,。

简介：Thegeneralprocedurebasedonthepotentiometrictitrationhasdeveloped.Accordingtotheprocedure,therationalequilibriumconstantsoftheionexchangereactionsRH/Na,RH/Ca,RH/Sr,RH/BafortheweakacidcationexchangeresinD725andROH/ClfortheweakbaseanionexchangeresinD705havebeendetermined.