简介:Arelevantexpertgrouphascheckedandassessedthefeasibilityofanintegratedpropyleneprojecttobecon-structedbytheChangjiangNaturalGasChemicalCo.,Ltd.Theexpertsunanimouslyadmittedthatthefeasibil-itystudyreportofthisprojectisperfectandtheconstruc-tionplanisbasicallyviable.ThisintegratedpropyleneprojectwillbelocatedintheChemicalAreaofRugaoHarbor,
简介:TheSouthwestResearchandDesignInstituteofChemicalIndustryuponundertakingtheNationalScienceandTechnologySupportProgram'CatalystformanufactureofEGviahydrogenationofoxalateandrelatedprocessdevelopment'envisagedinthe'EleventhFive-YearPlan'hassuccessfullydevelopedthePdseriesofcatalystsfor
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简介:Inthispaperalumpedparametermodelofatwo-passgas-to-gascrossflowheatexchangerwithhighspeedairflowhasbeenpresentedfortheinvestigationofitstransientbehaviours.Theeffectsofboththechangesofinlettemperatureandflowrateonoutlettemperaturecanbepredictedwiththismodel.Thecalcuationresultsundertypicalconditionsarecomparedwithexperimentalresultsandgoodagreementsareobtained.
简介:Basedontherainbow-ladderapproximationoftheDyson-Schwingerequationsandtheassumptionoftheanalytieityofthefermion-bosonvertexintheneighborhoodofzerochemicalpotential(μ=0)andneglectingtheμ-dependenceofthedressedgluonpropagator,weapplythemethodin[Phys.Rev.C71(2005)015205]ofstudyingthedressedquarkpropagatoratfinitechemicalpotentialtoprovethatthegeneralfermion-bosonvertexatfiniteμcanalsobeobtainedfromtheoneatμ=0byasimpleshiftofvariables.Usingthisresultweextendtheresultsof[Phys.Lett.B420(1998)267]tothesituationoffiniteehemicalpotentialandshowthatundertheapproximationswehavetaken,theGe11-MannOakesRennerrelationalsoholdsatfinitechemicalpotential.
简介:Hypericin是主要从属于节Euhypericum和凯勒的分类的Campylosporus的类Hypericum的工厂提取的最重要的phenanthoperylenequinones之一。普遍注意到抗病毒并且hypericin的反肿瘤性质刺激了化学合成的调查和这唯一的混合物的生合成。然而,合成策略为器官、生物的化学家是挑战性的。在这评论,在在过去的十年的全部的合成,半合成,和生合成的特定的重要进展被总结。