简介:Carbonsupportedgold-iridiumcomposite(AuIr/C)wassynthesizedbyafacileone-stepprocessandwasinvestigatedasthebifunctionalcatalystforoxygenreductionreaction(ORR)andoxygenevolutionreaction(OER).ThephysicalpropertiesoftheAuIr/Ccompositewerecharacterizedbytransmissionelectronmicroscopy(TEM),X-raydiffraction(XRD)andX-rayphotoelectronspectroscopy(XPS).AlthoughtheAuandIrintheAuIr/Cdidnotformalloy,itisclearthattheintroductionofIrdecreasestheaverageAuparticlesizeto4.2nmcomparedtothatintheAu/C(10.1nm).BysystematicalanalysisonchemicalstateofmetalsurfaceviaXPSandtheelectrochemicalresults,itwasfoundthattheAusurfacefortheAu/Ccanbeactivatedbypotentialcyclingfrom0.12Vto1.72V,resultingintheincreasedsurfaceroughnessofAu,thusimprovingtheORRactivity.Bythesamepotentialcycling,theIrsurfaceoftheIr/Cwasirreversiblyoxidized,leadingtodegradedORRactivitybutuninfluencedOERactivity.FortheAuIr/C,IrprotectsAuagainstbeingoxidizedduetothelowerelectronegativityofIr.CombiningtheadvantagesofAuandIrincatalyzingORRandOER,theAuIr/CcatalystdisplaysanenhancedcatalyticactivitytotheORRandacomparableOERactivity.Inthe50-cycleacceleratedagingtestfortheORRandOER,theAuIr/Cdisplayedasatisfiedstability,suggestingthattheAuIr/Ccatalystisapotentialbifunctionalcatalystfortheoxygenelectrode.
简介:OxygenIsotopeFractionationofCommonREFluorocarbonateFangTao(方涛)(InstituteofGeochemistry,AcademiaSinica,Guiyang550002,China)Re...
简介:Baosteel's60000m3/hairseparationunit(ASU)isthelargestoxygengeneratingsysteminChina.Theoperationalcostofsuchagiantsystemisveryhigh.Howtoreducetheoperationalcostisacriticalissue.Thispaperdiscussesthesystem'scharacteristics,thecurrentoperationalstatusandthedifficultiesinreducingthecost,andanalyzesrelevantindicators,suchasthetechnicalandeconomicalindicatorsofindividualunitsandsystemsaswellastheindicatorsconcerningthecosts.Therelationshipbetweenthecostandeacheconomicalindicatorandmeasurestooptimizeaneconomicaloperationoftheoxygengeneratingsystemarealsodiscussedinthispaper.
简介:Theeffectsofrefractoriesofquartz-corundunconsistingof45mass%quartzand55mass%corundum,fusedcorundumandfusedmagnesiaonthetotalaxygencontent(TOC)andthecompositionofinclusionsininterstitialfree(IF)steelwerestudied.3mass%microsilicawasaddedintothethreerefractoriesasbinder.Therefractorieswereshapedasliningofthegraphitecruciblebycastablemethod.IFsteelwasplacedinthecrucibles,thentheywereheatedat1600℃for90minand45minrespectively.Oxygencontentsofthesteelsampleswereobtainedbyaxygendeterminator.InclutsionswereanalyzedbySEMandEDS.TheresultsshowthattheTOCofsteelincreasedwithincreaseofIndexofOxygenPotential(IOP)oftherefractories.ThesteelsamplecopedwithMgOrefractorieshavingthelowestIOPhasthelowestTOC.
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简介:BulkZr55Al10Ni5Cu30metallicglassplateswithadimensionof85mm×35mm×4mmandacomplicatedplatewerefabricatedbyinjectingcastingmethodusingspongyzirconiumandindustrialpurityaluminum,nickelandcopperasrawmaterials.Itwasshownthattheholdingtimeofliquidmetalsatelevatedtemperatureshadagreatinfluenceontheoxygencontentoftheplatesduetothecontaminationresultingfromtheatmosphere.Increasingholdingtimeresultedintheincreaseofoxygencontentintheinjectedalloy.Theglasstransitiontemperaturesofthebulkmetallicglassplatesarehigherthanthatreportedintheliteratureandcrystallizationtemperatureislowerfortheonewithhigheroxygencontentatthesameheatingrate.Theextensionoftheundercooledliquidregion△Txreachingabout87Kis3Khigherthanthatpreviouslyreportedand26Khigherthanthatwithoxygencontentof0.076wtpctfortheonewithoxygencontentashighas0.065wtpct.Thereforetheoxygencontentofthealloyhasasignificantinfluenceontheglassformingabilityandthermalstabilityofbulkmetalglass.Itissuggestedthatdirectcorrelationbetweenhighglassformingabilityandlarge△Txisonlyvalidforawell-definedIowoxygenconcentrationorhastobereconsideredbyincorporatingoxygenasanadditionalalloyingelement.
简介:这研究为预言并且分类氧绑定蛋白质描述一个方法。第一,支持向量机器(SVM)模块为预言氧绑定蛋白质用氨基酸作文和dipeptide作文被开发,并且分别地完成了85.5%和87.8%的最大的精确性。第二,一个SVM模块基于氨基酸作文被开发,分别地分类进有为erythrocruorin,蚯蚓血红蛋白,血蓝蛋白,血红素,腿血红素,和肌球素蛋白质的95.8%,97.5%,97.5%,96.9%,99.4%,和96.0%的精确性的六个班的预言的氧绑定蛋白质。最后,一个SVM模块为分类氧绑定蛋白质用dipeptide作文被开发,并且分别地为上述六个班完成了96.1%,98.7%,98.7%,85.6%,99.6%,和93.3%的最大的精确性。所有模块被五倍的生气确认训练并且测试。基于上述途径,网服务者Oxypred为预言并且分类氧绑定蛋白质被开发(从http://www.imtech.res.in/raghava/oxypred/可得到)。
简介:Yifeng(TE17),Tinghui(GB2),Zhongzhu(TE3)andXiaxi(GB43)wereselectedaskeyacupointsplushyperbaricoxygentotreat50casesofsuddendeafness,andthetotaleffectiveratewas98%.
简介:Yttriumaluminumgarnet(YAG)transparentceramicswerefabricatedbysinteringatoxygenatmosphere.Tetraethylorthosilicate(TEOS)wasaddedasthesinteringadditivetocontrolthegraingrowthanddensification.Poreswereeliminatedclearlyattemperaturelowerthan1700oC,whilegrainsizewasaround3μm.Thein-linetransmittancewas80%at1064nmwhensamplesweresinteredat1710oC.TheeffectofTEOSwasstudiedinoxygenatmospheresinteringforNd:YAGtransparentceramics.Athighertemperaturelike1710oC,thegraingrowthmechanismwassolutedrag,whileat1630and1550oCthegraingrowthwascontrolledbyliquidphasesinteringmechanism.And0.5wt.%TEOSwasthebestaddingcontentforNd:YAGsinteredinoxygenatmosphere.
简介:RecentlytheCASQingdaoInstituteofBioenergyandProcessesincollaborationwiththeLeibnizUniversit?tHannover,ForschungszentrumJülichandBayerAGhasmadeattemptstocarryoutmethanearomatizationreactioninanoxygen-permeablemembranereactortoyield
简介:AbstractBackground:Hyperbaric oxygen treatment (HBOT) has been demonstrated to influence the keloid recurrence rate after surgery and to relieve keloid symptoms and other pathological processes in keloids. To explore the mechanism of the effect of HBOT on keloids, tumor immune gene expression and immune cell infiltration were studied in this work.Methods:From February 2021 to April 2021, HBOT was carried out on keloid patients four times before surgery. Keloid tissue samples were collected and divided into an HBOT group (keloid with HBOT before surgery [HK] group, n = 6) and a non-HBOT group (K group, n = 6). Tumor gene expression was analyzed with an Oncomine Immune Response Research Assay kit. Data were mined with R package. The differentially expressed genes between the groups were compared. Hub genes between the groups were determined and verified with Quantitative Real-time PCR. Immune cell infiltration was analyzed based on CIBERSORT deconvolution algorithm analysis of gene expression and verified with immunohistochemistry (IHC).Results:Inflammatory cell infiltration was reduced in the HK group. There were 178 upregulated genes and 217 downregulated genes. Ten hub genes were identified, including Integrin Subunit Alpha M (ITGAM), interleukin (IL)-4, IL-6, IL-2, Protein Tyrosine Phosphatase Receptor Type C (PTPRC), CD86, transforming growth factor (TGF), CD80, CTLA4, and IL-10. CD80, ITGAM, IL-4, and PTPRC with significantly downregulated expression were identified. IL-10 and IL-2 were upregulated in the HK group but without a significant difference. Infiltration differences of CD8 lymphocyte T cells, CD4 lymphocyte T-activated memory cells, and dendritic resting cells were identified with gene CIBERSORT deconvolution algorithm analysis. Infiltration levels of CD4 lymphocyte T cell in the HK group were significantly higher than those of the K group in IHC verification.Conclusion:HBOT affected tumor gene expression and immune cell infiltration in keloids. CD4 lymphocyte T cell, especially activated memory CD4+T, might be the key regulatory immune cell, and its related gene expression needs further study.
简介:沉积氧需求(草皮)是为水质量分析并且为在河,湖,河口和海湾里当模特儿的水质量的一个关键参数。草皮能在实验室并且在situ被测量。然而,在里面situ技术看起来是为测量草皮,,的更好的途径它可能提供更代表性、精确的结果。以便优化设计在situ草皮测量房间,在圆柱的草皮测量房间的三维的流动地,通常使用为在situ大小,被使用基于RNG的k-数字地模仿了两倍方程骚乱模型。有三种不同流入管子配置的草皮房间被调查。结果证明那房间III在另外的图案上介绍明显的优点为在situ草皮测量,因为好流动混合能被完成,底部沉积暂停能在房间被避免。数字模拟结果被比较验证,存在结果源于实验室实验。设计反映数字模拟的结果的草皮测量房间成功地被测试为在新鲜、盐的水里的situ草皮大小。
简介:Accordingto350MWand600MWboilers,underoxygenfuelcondition,throughthereasonablecontroloftheprimaryandsecondaryflowandthecorrectoptionandrevisionofmathematicalmodel,thetemperaturedistribution,heatfluxdistributionandabsorptionheatdistribution,etc.wasobtainedwhichcomparedwiththoseunderaircondition.Throughcalculation,itisobtainedthattheprimaryandsecondaryflowmixedwell,goodtangentiallyfiredcombustioninfurnacewasformed,thetemperatureunderairconditionobviouslyhigherthanthetemperatureunderO26condition.Theadiabaticflametemperatureofwetcyclewasslightlyhigherthanthatofdrycycle.Themaximumheatloadappearedonthewaterwallaroundtheburnerarea.Theheatloadgraduallydecreasedalongthefurnaceheightupanddowninburnerarea.TheheatabsorptioncapacityofthefurnaceunderO26waslowerthanthatundertheaircondition.Theheatabsorptioncapacityoftheplatenheatingsurfaceunder026wasequaltothatunderaircondition.AndtheheatabsorbingcapacityofwaterwallunderO26wasabout7%~12%lessthanthatunderaircondition.
简介:OnthebasisoftheresearchofDObudgetorkineticsinshrimppond,themaininfluenceprocessofDOanditsseasonalvariationsarequantitativelydescribedthroughredividingthebudgetprocessandmodifyingthequantitativemethodoftheprocess.Thepercentagesofoxygendemandofvariousprocessesinthetotaloxygendemandaredifferentinshrimpcultivationseasons.Itisshowedthatthedissolvedoxygendemandofmini-organismsisthemajoraffectedfactorofDOinthisenvironmentandapproximatelyaccountsfor64.1~74.1%ofthetotaloxygendemand.Intheearlyperiodofshrimpculture,thedissolvedoxygendemandofallotrophicbacteriadegradingorganicmattersismuchlowerthanthatofphytoplanktonrespiration.Butinthemidterrnandlaterperiod,itisabout50%ofthetotaloxygendemandbecauseofthehigherwatertemperatureandmoreseriousself-pollution.Thedissolvedoxygendemandofsedimentislowerandjust19.1~28.8%,whilethepercentageofshrimpoxygendemandislower.TheeffectofphytoplanktononDOinshrimpculturingwaterhasdualism.Oneistheoxygenproducingprocessofphotosynthesisandtheotheristheoxygenconsumptionprocessofrespiration.Itisestimatedthatthedissolvedoxygendemandofphytoplanktonrespirationisapproximatelyone-fifthoftheoxygenproducedbyphotosynthesisundernormalilluminationconditions.Thedissolvedoxygendemandofallotrophicbacteriadegradingorganicmattersandthetotaloxygendemandofsedimentincrease4timesand1.7timesrespectivelyfromtheearlyperiodtothemidtermandlaterperiod.Obviously,theDOofculturingwatercanbealsogreatlyimprovedbycontrollingtheselfpollutionoforganicmattersduringshrimpculture.