简介：Thesurfaceshapeofliquidwateriswellcontrolledduringnanosecondpulselaserablationplasmapropulsion.Inthisstudy,wemeasuredtheeffectoftheshapeonthecouplingcoefficientandthespecificimpulse.Wefoundthatthecouplingcoefficientandspecificimpulsecouldbeoptimizedbyvaryingthesurfaceconvexity.Basedontheanalysisofthesurfaceradiuscurvature,wedemonstratethattheconvexsurfacechangesthelaserfocalpositionstoachievehighefficiency.

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简介：Hydrogenthermalplasmajetwasemployedtopreparenano-sizedboronpowderwithhydrogenreductionofBCl3.Themaximumyieldofnano-sizedboronpowderswasabout50%withtheoperationalconditionsofH2/BCl3of4.5:1,totalfeedof4.9m3/h,andplasmapowerof25kW.ThesampleswereanalyzedbyX-raydiffraction（XRD）,fieldemissionscanningelectronmicroscopy（FE-SEM）,andinductivelycoupledplasma-massspectrometry（ICP-MS）,inductivelycoupledplasma-atomicemissionspectrometry（ICP-AES）,inductivecombustioninfraredabsorption（ICIA）andinfraredthermalconductivityofoxygenandnitrogenanalyzer（ITCA）.Theresultsshowthattheboronpowdershavedifferentcrystalstructureswithhigherdispersionandpurity.Theaveragediameterisabout50nm,andthepurityis90.29%orso.Thisnewtechnologycanusesimpleprocesstoproducehighqualityboronpowders,andisfeasibleforindustrialproduction.

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简介：Thermalplasmawasappliedforthetreatmentofcokewastewatersludgederivedfromthesteelindustryinordertoinvestigatethefeasibilityofthesafetreatmentandenergyrecoveryofthesludge.A30kWplasmatorchsystemwasappliedtostudythevitrificationandgasproductionofcokewastewatersludge.Toxicityleachingresultsindicatedthatthesludgetreatedviathethermalplasmaprocessconvertedintoavitrifiedslagwhichresistedtheleachingofheavymetals.CO2wasutilizedasworkinggastostudytheproductionandheatenergyofthesyngas.Theheatingvalueofthegasproductsbythermalplasmaachieved8.43kJ/L,indicatingthefurtherutilizationofthegasproducts.Consideringtheutilizationofthesyngasandrecoveryheatfromthegasproducts,theestimatedtreatmentcostofcokewastewatersludgeviaplasmatorchwasabout0.98CNY/kgsludgeintheexperiment.Bypreliminaryeconomicanalysis,thedehydrationcosttakesanimportantpartofthetotalsludgetreatmentcost.Thetreatmentcostofthecokewastewatersludgewith50wt.%moisturewascalculatedtobeabout1.45CNY/kgsludgedrybasis.Thetreatmentcostofthecokewastewatersludgecouldbeeffectivelycontrolledbydecreasingthewatercontentofthesludge.Thesefindingssuggestthataneconomicdewateringpretreatmentmethodcouldbecombinedtocutthetotaltreatmentcostinanactualtreatmentprocess.

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简介：FractionsofplasmaproteinofmaleKunmingmice(bodyweight24.2±0.3g)，treatedwithCisplatini.p.injectionindoseof10mg/kg,wereobtainedbyseparationonSephadex-G-50columns,bufferedwithammoniumacetatetopH5.7,TheXSRFexperimentswereperformedattheBEPC(BeijingElectronPositronCollider)synchrotronradiationfacility.Theelements(Pt,S,Ca,Fe,Ni,Cu,Zn,Se,BrandSr)inthefractionoftheplasmaproteins(>22KD)wereassayedusinghighlysensitiveSXRF.TherelativeconcentrationsofelementswerecalculatedbyanormalizationofCOmptonscatteringintensityaround22KeV,afterthenormalizationforcollectingtimeofX-rayspectrumandthecountingoftheionchamber,andsubractingthecontributionofthepolycarbonatefilmusedforsupportingthesamples.ThedeterminationcouldprovethattheelementPtinplasmawasboundwithmacro-molecularprotein.CuandSwerepresentinthefractionoftheproteininmicetreatedwithCisplatinandexhibitedanincrease,therationoftreated/controlwere1.66±0.06and1.78±0.33repectively,whereasZndecreasedtoaratioof0.78±0.09,OurresultsareinagreementwithotherswhichshowedthatCisplatinexposureleadstoamarkedlossofkidneycopper,andamoderateriseindidneyzinc.However,thisworkmainlyfocussedontheimplementationofthisanalyticalprocedure,butnotontheresultsoftheinvestigationsoftheeffectofCisplatinontraceelementsinplasmaprotein.

简介：Whenwespeakofclusters,wehaveinmindentitieswhichhaveneitherthewell-definedcompositions,geometries,andstrongbondsofconventionalmoleculesnortheboundary-independentpropertiesofbulkmatter.Forexample,anaggregateofafewatomsheldtogetherbyVanderWaalsforcesconstitutesacluster.Butclustersneednotbeweaklybound,severalmetalatomsboundtogetheralsoconstituteacluster.Clustersneednotbecomposedofasinglekindofchemicalentity,eitheratomicormolecular,

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简介：Dependenceofthecurrent-voltagecharacteristicsofanon-transferredDCcascadedplasmatorchusedfornanoparticlesynthesis,ontheplasmacurrentandtheplasmaargongasflowratearereportedinthispaper.Thepotentialstructureinsidethetorchanditsdependenceontheplasmacurrentandgasflowratearealsoinvestigated.Thearcvoltageisseentoexhibitnegativecharacteristicforacurrentbelow150Aandpositivecharacteristicabovethatcurrentvalue.Thevoltagedropneartheelectrodesisfoundtodecreasewiththeincreaseinplasmacurrent.25%ofthetotalvoltageisdroppednearthecathodeataplasmacurrentof50Aandaargonplasmagasflowrateof10literperminute(LPM),anditdecreasesto12%withthecurrentincreasingto300A,andto17%withagasflowrateof25LPM.Thevariationinthetorchefficiencywiththegasflowrateandplasmacurrentisalsoreported.Theefficiencyofthetorchisfoundtobebetween36%and48%.Inaddition,theplasmagastemperatureatvariouspositionsofthereactorandfordifferentcurrentsandvoltagesaremeasuredbycalorimetricestimationwithaheatbalancetechnique.

简介：Objective:Tostudythechangesofthrombomodulin(TM)inbothplasmaandtissueextractsofcancerpatientsforevaluatingitsclinicalsignificance.Methods:PlasmaTMlevelsweremeasuredbyenzyme-linkedimmunosorbentassay(ELISA)inbothplasmaof188cancerpatientsand24cancertissueextractsincludingtheiradjacentnon-cancertissues.Results:TheplasmaTMlevelsbothincancerpatientsandinmetastasispatientsweresignificantlyhigherthanthatincontrols[(33.47±14.25)μg/L,(41.68±16.96)μg/L,vs(20.40±7.22)μg/L,P<0.01].TheplasmaTMlevelsincancerpatientsafteroperationdecreasedobviouslythanthatbeforeoperation[(18.45±9.96)μg/L,vs(28.29±11.74)μg/L,P<0.01],whereas,theplasmaTMlevelsinpatientswithrecurrenceandmetastasisafteroperationincreasedobviously[(34.50±12.57)μg/L].Amongthetypesofcancer,theplasmaTMlevelsinmetastasislungcancers,gastriccancersandpancreaticcancersweresignificantlyhigherthanthatinnon-metastasisrespectivecancers.Nosignificantdifferenceswerefoundbetweencontrolsandnon-metastasiscancersincludinggastriccancers,pancreaticcancers,nasopharyngealcancers,largeintestinecancersandlaryngealcancers(P>0.05).TheTMlevelsincancertissueextractsweresignificantlylowerthanthatintheiradjacentnon-cancertissueextracts[(647.71±317.51)μg/Lvs(1455.63±772.22)μg/L,P<0.01].Onthecontrary,theplasmaTMlevelsinthesecancersweresignificantlyhigherthanthatincontrols.Conclusion:TheriseofplasmaTMlevelsincancerpatientswasassociatedwithmetastasisanddiffusionofcancers.TheTMlevelscanbeservedasansensitiveindexforjudgingprogressionandmetastasisofcancers.

简介：Thepoloidalrotationofthemagnetizededgeplasmaintokamakdrivenbytheponderomotiveforcewhichisgeneratedbyinjectinglowerhybridwave(LHW)electricfieldhasbeenstudied.TheLHWislaunchedfromawaveguideintheplasmaedge,andbyBrambilla’sgrilltheory,analyticexpressionsforthewaveelectricfieldintheslabmodelofaninhomogeneouscoldplasmahavebeenderived.ItisshownthatastrongwaveelectricfieldwillbegeneratedintheplasmaedgebyinjectingLHwaveofthepowerinMWmagnitude,andthiselectricfieldwillinduceapoloidalrotationwithashearedpoloidalvelocity.PACS:52.55.Fa

简介：【摘要】目的：探讨plasma治疗瘢痕不良反应的护理对策。方法：本研究选取在我院2021年1月至2022年1月间进行治疗的瘢痕患者中随机选取68例，将其随机分为对照组和观察组。对照组患者采用常规护理，观察组患者则在采用常规护理的同时采用特色式护理模式包括心理干预、对症干预等。通过患者的满意度对比两组患者的护理效果。结果：两组患者在以不同的方式进行护理后，观察组的患者的满意度优于对照组，差异显著（P

简介：学习指南针这是报刊、网站上常见的知识小短文,以普及常识为主旨,点到即止,并不会深入探讨细节。文章覆盖的时间从公元前四千多年的美索不达米亚人到16世纪的教皇格列高利十三世,再到现代,时间跨度达六千多年。四百多字的短文显然无法深究历法变化的各种原因及细节,只能非常简单地介绍几大主要事件。阅读时要注意把握变化趋势——即时间愈往后,历法越准确。

简介：放学了，小红和小芳在一起做家庭作业，小红说：“1/3和1/4之间没有其他分数了。”可小芳说：“它们之间不但有分数，而且有许多不同的分数。”小朋友她俩谁说得对？1/3和1/4之间有许多不同的分数号？请你找出2个。

简介：当都市渐成樊篱，心灵的园地块垒纵横，放飞成为惟一的渴望。于是，你成了我突破而出的知音。无需惘顾都市的天空，让头灯如炬直指远方，上路。

简介：ThefabricationofX-raymasksisacriticalandchallengingprocessinLIGAtechnique.Asinductivelycoupledplasma(ICP)deepetchingappearstobethemostsuitablesourcefordeepsiliconetching,wefabricatedanewtypeX-raymaskusingthistechnique.IncomparisonwithothertypesofX-raymasks,themaskwefabricatedhastheadvantagesofitslowcostanditssimplefabricationprocess.BesiredmicrostructureshavealsobeenfabricatedusingthisnewtypeX-raymaskinLIGAtechnique.

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简介：Anovelatmosphericplasmadevicedevelopedinthispaper,whichismoreeffectiveandconvenienttostudytheplasma-initiatedpolymerization(PIP)thanconventionalsetup.Thestructureandmechanismofthedeviceisintroduced.Someplasma-initiatedpolymerizationexperimentsarecarriedoutonthedevice,andtheconversionofAA(Acrylicacid)andAM(Acrylamide)atmospheric(N2)plasmapolymerizationarerespectively89%and94%after120hpostpolymerization,wherebyIRspectraoftheproduct(AA,AM).OurPIPresultareconfirmed.

简介：Thehydrophilicityofsiliconehydrogelsusedassoftcornealcontactlensplaysanimportantroleinwearingcomfort.Inordertoenhancehydrophilicityandproteinresistance,siliconehydrogelmembranesweremodifiedbyatmosphericpressureglowdischargeplasma(APGDP)inducedsurfacegraftpolymerizationofN-vinylpyrrolidone(NVP)andpoly(oligoethyleneglycolmethylethermethacrylate)(PEGMA)inthispaper.XPSanalysisdemonstratedthesuccessofgraftpolymerizationofNVPandPEGMAontothesurfaceofsiliconehydrogelmembranes.Thehydrophilicityofsiliconehydrogelswascharacterizedbythemeasurementofwatercontactangle(WCA).TheresultshowedthatNVPgraftedsiliconehydrogelhastheWCAofabout68°andPEGMAgraftedsiliconehydrogelhasthelowestWCAofabout62°,whilethepristinesiliconehydrogelishydrophobicwiththeWCAofabout103°.Proteinresistanceofsiliconehydrogelswasinvestigatedbythemethodofbicinchoninicacidassayusingbovineserumalbumin(BSA)asamodel.It'sfoundthatthegraftedsiliconehydrogelhasasignificantimprovementofproteinresistance,andPEGMAgraftingismoreefficientforthereductionofproteinadsorptionthanNVPgrafting.ThesiliconehydrogelmembranesgraftedwithNVPandPEGMAaregoodcandidatesofsoftcornealcontactlenses.