简介:Inthispaper,theauthorspointoutanddemonstratethedifferenceoftheconceptsconcerningco-satisfiableandco-validbetweenonefirst-orderlanguageandtwofirst-orderlanguages,andputforwardtheconceptsaboutuniformco-identicaltruthanduniformco-satisfiability.Thussometheoremsinthebook“ACourseinMathematicalLogic”,writtenbyJ.L.BellandM.Machover,arecorrected.
简介:Twoseriesofmixedoxides,CoAlMandMgAlM(M=Cr,Mn,Fe,Co,Ni,Cu),werepreparedbycalciningtheircorrespondinghydrotalcite-likecompounds(HTLc).TheratioofMg:Al:M(orCo:Al:M)was3:1:1.ThecatalyticactivityofallsamplesforthereactionofNO+COwasinvestigated.TheresultsshowedthattheactivityofCoAlMwasmuchhigherthanthatofMgAlM.ThestructureandthepropertyofredoxwerecharacterizedbyXRDandH2-TPR.TheresultsindicatedthatonlyMgOphasewasobservedaftercalciningMgAlMhydrotalcites,andthetransitionmetalsbecamemorestable.Thespinel-likephaseappearedinallofCoAlMsamplesafterthecalcination,andthetransitionmetalswerechangedtobemoreactive,andeasilyreduced.TheactivitiesofthreeseriesofmixedoxidesCoAlCuobtainedfromdifferentpreparationmethods,differentratioofCo:Al:Cuandatdifferentcalcinationtemperatures,werestudiedindetailforproposingthemechanismofreaction.TheabilityofadsorptionofNOandCO
简介:TheCurietemperatureof(Nd1-xPrx)2Fe14CoyBcompounds(x=0,0.2,…,1.0andy=O,2,4,6,14)hasbeendeterminedwithACinitialsusceptibilitymeasurement.ItwasfoundthatthevariationsofCurietempera-turewithxisnotlinearfory=0and14,whereasitislinearforothervaluesofy.Thelatticeconstantsof(Nd1-xPrx)2Fet14BweredeterminedbyusingX-raydiffraction.Thelatticeexpansionwasmostlyalongthecaxis,whereasthatalongthea-axisremainedpracticallyzeroforthewholeseries.ItissuggestedthatPratomsmayshowsitepreferenceinR2M14Bcompounds(M=FeorCo).DuetothesubstitutionofCoforFe.thetendencyofsitepreferenceofPrbecomeslesspronounced,whichmaybeattributedtothedecreaseofdiffer-enceofcrystalelectricfield(CEF)actingonthetworareearthsiteswiththeintroductionofCoorFe.Incon-trasttothatofthePratoms,thesitepreferenceofCoiu(Nd(1-x)Prx)2Fe(14-y)CoyBcompoundsdoesnotdependonthecompositionoftherareearthsublattice(R=NdorPr).
简介:FormerlyNo.713Factory,HuaxingMetallur-gical&ChemicalCo.underChinaNuclearIndustryGeneralCorporationwasestablishedin1958andputintooperationin1962.ThecorporationislocatedinShangrao,JiangxiProvinceandwasoriginallydesignedtoproducerawmaterialsformillitaryuse.Inkeepingupwiththepaceofthedevelopmentofthenationaleconomy,
简介:目的比较HBVS基因与HCVC基因真核表达质粒融合基因免疫与联合基因免疫的效果,为HBV和HCV融合基因疫苗研究奠定基础。方法将同时含HBVS基因与HCVC基因的真核表达质粒SCpcDNA3.1、含HBVS基因真核表达质粒SpcDNA3.1、含HCVC基因真核表达质粒CpcDNA3.1分别免疫小鼠;将SpcDNA3.1+CpcDNA3.1联合免疫小鼠。ELISA法检测血清抗HBs和抗HCV。结果无论是抗HBs和抗HCV阳转出现的时间、阳转率和体液免疫应答强度,融合基因免疫都优于联合基因免疫:融合基因免疫的抗HBs的应答强度低于SpcDNA3.1质粒的免疫,抗HBc的应答强度高于CpcDNA3.1质粒的免疫。结论HCVC基因或其表达产物对HBVS基因或抗原的表达和提呈有抑制作用;HCVC基因与HBVS基因相融合,更有利于HCV核心蛋白的提呈。
简介:TheAnhuiHuaihuaGroupCo.Ltd.islocatedinthecentreofHuainanCity,closetoHuainan’sninecoalminesandthreepowergeneratingplants,witheasy-to-reachtraffic,developedtelecommunications,favorablepolicyandadvantageousdevelopmentconditions.ThecompanyisAnhui’simportantbaseincoalandchemicals,withfixedassetsofRMB900million;itisaClassAlegalpersonenterprise,realizinganintegrationofcapitalandoperation.Productioncapabilityformainproducts:280,000tonsofsyntheticammonia,80,000tonsofconcentratednitrateacid,110,000tonsofcarbamide,140,000tonsofammoniumnitrate,60,000tonsofpuresoda,250m~2
简介:1.MainachievementsofenvironmentalprotectionFrom1987to1994,withdoublingoftheinstalledgeneratingcapacity,thecoalconsumptionofpowerplantsdoubledaswell.Powerindustryhasbeenfacingthechallengefromenvironmentalprotection.Inordertopromotethecoordinateddevelopmentofpowerindustryandenvironmentalprotection,powersector:
简介:GansuRECo.Ltd.wasformerlyabery-lliumproducersetupin1970.ItchangedovertoproduceREproductsandrenamedin1975.ItislocatedinNorthwestChina’sin-dustrialcity,Lanzhou,thecapitalcityofGansuProvince.Ithasnearlythreehundredengineer-ingnersonnelandmorethantwentywellequippedproductionlinesbestsuitableforprocessingvariouskindsofrawmaterialsfromacrossthecountry.RE
简介:ThebindingofCo(bpy)2dppz3+tocalfthymusDNAwasinvestigatedbyusingabsorptionandemissionspectroscopy,DNAmeltingtechniques,cyclicvoltammetry,viscosityandelectro-phoresismeasurements,wherebpyis2,2’-bipyridyl,dppzisdipyrido[3,2-o:2’,3’-c]phenazine.Thebindingcompoundshowsabsorptionhypochromicity,fluorescenceenhancement,andincreasingofDNAmeltingtemperatureandthespecificviscosity.CVmeasurementshowstheshiftsinoxidation-reductionpotentialandchangeinpeakcurrentwithadditionofDNA.ThecompoundisalsoshowntobemoreefficientphotosensitisersforstrandbreaksinplasmidDNA.