简介：五亿年前的声音是怎么样的？德国FISCHER＆FISCHER成立于1981年，三十多年来专注于板岩音箱的设计与制作，创始人ThomasFischer的祖父拥有一个开采板岩的石场，大概在40年前他们开始采用板岩来制作音箱，令这种深藏了5亿年的岩石被重新赋予生命。

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简介：乔治费歇尔（GeorgFischer）在昆山的新铸铁厂正式成立。因该厂将生产与安全性相关的关键部件，所以生产设施全部高标准打造

简介：AsustainablestrategyforFischer–Tropschironcatalystsissuccessfullyachievedbyembeddingofsynergisticpromotersfromarenewableresource,corncob.Theiron-basedcatalysts,namedas“corncob-driven”catalysts,arecomposedofironspeciessupportedoncarbonasprimaryactivecomponentsandvariousminerals（K,Mg,Ca,andSi,etc.）aspromoters.Thecorncob-drivencatalystsarefacilelysynthesizedbyaone-pothydrothermaltreatmentundermildconditions.Thecharacterizationresultsindicatethattheformationofironcarbidesfromhumboldtineisclearlyenhancedandthemorphologyofcatalystparticlestendstobemoreregularmicrospheresafteraddingcorncob.Itisobservedthattheoptimizedcorncob-drivencatalystexhibitsahigherconversionthanwithoutpromoters’catalystinFischer–Tropschsynthesis（ca.73%vs.ca.49%）.Moreimportantly,asynergisticeffectexistsinmultiplepromotersfromcorncobthatcanenhanceheavyhydrocarbonsselectivityandlowerCO2selectivity,obviouslydifferentfromthecatalystwithpromotersfromchemicals.Theproposedsynthesisrouteofcorncob-drivencatalystsprovidesnewstrategiesfortheutilizationofrenewableresourcesandeliminationofenvironmentalpollutantsfromchemicalpromoters.

简介：深圳中心·天元项目建筑设计师在超高层的外墙设计了大量的天然石材干挂,希望以天然石材呈现出建筑的完美与奢华.而要实现这-设计理念,则必须充分考虑天然石材在时间维度上的耐久性、在空间维度上的安装维护便利性,以及在人性关怀维度上的万无-失和安全可靠性.

简介：E、Fischer(以下简称E、F)对葡萄糖分子构型的测定是有机化学的教学难点之一,今以南大本为依循线索(见南京大学有机化学教研组编《有机化学》下册P278—P279),兹对E、F法做一简析。为了避免误解,需要说明的是,这不是一篇有关某个实验的史料介绍的文字,文中一些无关宏旨的叙述纯然是为了叙述的自然性的需要而做出的。葡萄糖分子构型的确定,包括两方面的工作:第一:开链式中各手型碳原子构型的确定。第二:氧环式中半缩醛环大小的确定。由于氧环式中半缩醛环的大小的推证较为简单,故从略。本文仅限于对开链式中各

简介：Carbonnanotube(CNT)-supportedRunanoparticleswithmeansizesrangingfrom2.3to9.2nmwerepreparedbydifferentpost-treatmentsandstudiedforFischer-Tropsch(FT)synthesis.TheeffectsofRuparticlesizeoncatalyticbehaviorswereinvestigatedatbothshorterandlongercontacttimes.Atshortercontacttime,wherethesecondaryreactionswereinsignificant,theturnoverfrequency(TOF)forCOconversionwasdependentonthemeansizeofRuparticles;TOFincreasedwiththemeansizeofRuparticlesfrom2.3to6.3nmandthendecreasedslightly.Atthesametime,theselectivitiestoC5+hydrocarbonsincreasedgraduallywiththemeansizeofRuparticlesupto6.3nmandthenkeptalmostunchangedwithafurtherincreaseinRuparticlesize.Atlongercontacttime,C10-C20selectivityincreasedsignificantlyattheexpenseofC21+selectivity,suggestingtheoccurrenceoftheselectivehydrocrackingofC21+toC10-C20hydrocarbons.

简介：摘要目的对Fischer编制的简版就医态度量表(attitudes toward medical help-seeking scale，ATMHSS)进行汉化，并分析就医态度量表中文版在中国居民群体中的信度和效度。方法以方便取样的方法，选取来自不同城市居民769名，进行问卷调查，通过项目分析及探索性因素分析初步筛选，确定量表最终项目。检验ATMHSS的中文修订版的信度和效度。结果通过探索性因子分析，共提取四个主因子，分别为行为意向(10个条目)、非宿命论(10个条目)、医疗信任(6个条目)和非回避态度(4个条目)。ATMHSS各维度与总分相关系数在0.641～0.839之间，各维度相关系数在0.213～0.556之间。ATMHSS与各效标变量均呈显著正相关(r＝0.406～0.696，均P<0.01)。验证性因素分析结果显示，各项目拟合度良好(χ2＝752.572，df＝391，χ2/df＝1.925，RMSEA＝0.045，SRMR＝0.058，CFI＝0.902，GFI＝0.903，IFI＝0.903，TLI＝0.891)。ATMHSS的内部一致性信度在0.726～0.879之间，重测信度在0.622～0.736之间。结论ATMHSS中文修订版信效度良好，可作为测量就医态度的有力工具。

简介：Thl-responseplaysacrucialroleindeterminingpathogenesisoforgan-specificautoimmunediseases.ItisbelievedthatbothIL-12andINF-αareinitiatorstoregulateTh1-response.Inourexperimentalautoimmuneuveitis(EAU)model,bothLewisandFischer344ratssharethesameMHCclassⅡImolecules,whileLewisratisEAUsusceptibleandFischer344ratisEAUresistant.However,underthesameconditionofimmunization,ifpertussistoxin(PTX)wasinjectedintraperitoneallyasanadditionaladjuvant,Fischer344ratcandevelopEAU.InthisstudyweinvestigatewhichmechanismsareinvolvedintheinductionofEAUinCFA+R16+PTX-treated(CRP-treated)Fischer344rats.InvivoandinvitrodatademonstratedthatThl-cytokine,IFN-γmRNAexpressionwassignificantlyincreasedindiseasetargettissue-eyesandindraininglymphnodecellsofCRP-treatedFischer344rat.WhenIL-12andIFN-αmRNAexpressionwerecomparedintheexperimentalgroups,onlyIFN-αmRNAexpressionwasassociatedwithEAUdevelopment.TodistinguishthesourcesofIFN-αproducingcells,itwasobservedthatIFN-αexpressionwasmainlyproducedbymacrophages.ItwasfurtherconfirmedthatnormalmacrophagefromFischer344ratwasabletoproducesignificantIFN-αinthepresenceofPTX.ThedatastronglysuggestedthatIFN-αmightbeinvolvedininitiatingThl-celldifferentiationandinturncontributetotheinductionofEAU.HighIFN-αexpressioninducedbyPTXmayrepresentanovelpathwaytoinitiateThlresponseinFischer344rat.

简介：ThedetailedkineticsofFischer-TropschsynthesisoveranindustrialFe/Cu/La/Sicatalystwasstudiedinacontinuousspinningbasketreactorundertheconditionsrelevanttoindustrialoperations.ReactionrateequationswerederivedonthebasisofLangmuir-HinshelwoodHougen-WatsontypemodelsforFischer-Tropschsynthesisbasedonpossiblereactionssetsoriginatedfromthecarbide,enolicandcombinedenol/carbidemechanisms.Kineticmodelcandidateswereevaluatedbytheglobaloptimizationofkineticparameters,whichwererealizedbyfirstminimizationofmulti-responseobjectivefunctionswithconventionalLevenberg-Marquardtmethod.Itwasfoundthatanenolicmechanismbasedmodelcouldproduceagoodfitoftheexperimentaldata.Theactivationenergyforparaffinformationis95kJmol-1whichissmallerthanthatforolefinformation(121kJmol-1).

简介：K-promotediron/carbonnanotubescomposite(i.e.,FeK-OX)waspreparedbyaredoxreactionbetweencarbonnanotubesandK_2FeO_4followedbythermaltreatmentsonapurposeastheFischer–Tropschcatalystforthedirectconversionofsyngastolowerolefins.ItscatalyticbehaviorswerecomparedwiththoseoftheothertwoFe-IMandFeK-IMcatalystspreparedbyimpregnationmethodfollowedbythermaltreatments.ThenovelFeK-OXcompositecatalystisfoundtoexhibithigherhydrocarbonselectivity,lowerolefinsselectivityandchaingrowthprobabilityaswellasbetterstability.ThecatalyststructureperformancerelationshiphasbeenestablishedusingmultipletechniquesincludingXRD,Raman,TEMandEDSelementalmapping.Inaddition,effectsofadditionalpotassiumintotheFeK-OXcompositecatalystontheFTOperformancewerealsoinvestigatedanddiscussed.Additionalpotassiumpromotersfurtherendowthecatalystswithhigheryieldoflowerolefins.Theseresultsdemonstratedthattheintroductionmethodofpromotersandironspeciesplaysacrucialroleinthedesignandfabricationofhighlyactive,selectiveandstableiron-basedcompositecatalystsfortheFTOreaction.

简介：Aseriesof3wt%Ruembeddedonorderedmesoporouscarbon(OMC)catalystswithdifferentporesizeswerepreparedbyautoreductionbetweenrutheniumprecursorsandcarbonsourcesat1123K.RunanoparticleswereembeddedonthecarbonwallsofOMC.CharacterizationtechnologiesincludingpowerX-raydiffraction(XRD),nitrogenadsorption-desorption,transmissionelectronmicroscopy(TEM),andhydrogentemperature-programmedreduction(H2-TPR)wereusedtoscrutinizethecatalysts.ThecatalystactivityforFischer-Tropschsynthesis(FTS)wasmeasuredinafixedbedreactor.Itwasrevealedthat3wt%Ru-OMCcatalystsexhibitedhighlyorderedmesoporousstructureandlargesurfacearea.Comparedwiththecatalystswithsmallerpores,thecatalystswithlargerporeswereinclinedtoformlargerRuparticles.These3wt%Ru-OMCcatalystswithdifferentporesizesweremorestablethan3wt%Ru/ACcatalystduringtheFTSreactionsbecauseRuparticleswereembeddedonthecarbonwalls,suppressingparticlesaggregation,movementandoxidation.ThecatalyticactivityandC5+selectivitywerefoundtoincreasewiththeincreasingporesize,however,CH4selectivityshowedtheoppositetrend.ThesechangesmaybeexplainedintermsofthespecialenvironmentoftheactiveRusitesandthediffusionofproductsintheporesofthecatalysts,suggestingthattheactivityandhydrocarbonselectivityaremoredependentontheporesizeofOMCthanontheRuparticlesize.

简介：OnSeptember19,2018,the100kt/acommercialdemonstrationhigh-temperatureFischer-Tropschsynthesisunit,constructedbytheShaanxiFutureEnergyChemicalCompany,Ltd.(FECC),cameonstreamsuccessfullyatthefirstattemptandhadbeenoperatingcontinuouslyandsmoothlyfor168hoursatfullload.ItistoldthatthisisthefirstcommercialdemonstrationhightemperatureFischer-TropschsynthesisunitbuiltinChinawithcompletelyindependentintellectualpropertyrights.Thecommissioningofthisdemonstrationunitevidencesthatthehigh-temperatureFischer-Tropschsynthesistechnologyhasfullymettheindustrializationconditions.

简介：Co-basedcatalystswerepreparedbyusingdielectric-barrierdischarge(DBD)plasmaasanalternativemethodtoconventionalthermalcalcination.ThecharacterizationresultsofN2-physisorption,temperatureprogrammedreduction(TPR),transmissionelectronmicroscope(TEM),andX-raydiffraction(XRD)indicatedthatthecatalystspreparedbyDBDplasmahadahigherspecificsurfacearea,lowerreductiontemperature,smallerparticlesizeandhighercobaltdispersionascomparedtocalcinedcatalysts.TheDBDplasmamethodcanpreventthesinteringandaggregationofactiveparticlesonthesupportduetothedecreasedtreatmenttime(0.5h)atlowertemperaturecomparedtothelongerthermalcalcinationathighertemperature(at500℃for5h).Asaresult,thecatalyticperformanceoftheFischer-TropschsynthesisonDBDplasmatreatedCo/SiO2catalystshowedanenhancedactivity,C5+selectivityandcatalyticstabilityascomparedtotheconventionalthermalcalcinedCo/SiO2catalyst.

简介：创新是设计随时代前进和消费需求增加所必行之路，洁具业也正着眼于通过创新的产品开发和全新的设计理念，逐渐改变那些不愿投资的家庭和物业开发商的陈旧观念。我们关注到一些国际卫浴品牌在中国市场的巨大成功，而这些成功，正是由不断的设计创新开始。

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简介：目的研究氩氦冷冻治疗9L/Fischer344大鼠脑胶质瘤的疗效及预后。方法Fischer344大鼠胶质瘤模型建立成功后,随机分为空白对照组、手术组、氩氦冷冻组,每组10只。游标卡尺测量并计算肿瘤体积,观察各组大鼠行为及生存期。结果空白对照组、手术组和氩氦冷冻组大鼠生存时间分别为（78.5±1.1）d、（171.0±10.8）d和（252.8±5.0）d,差异具有统计学意义（P=0.002）。氩氦冷冻组肿瘤体积呈逐渐缩小趋势。结论氩氦冷冻是治疗胶质瘤有效方法,推测可能与瘤细胞破裂,抗原暴露,而刺激机体产生抗肿瘤的抗体有关。