SAE AMS4130 Aluminum Alloy Die Forgings, 4.4Cu - 0.85Si - 0.80Mn (2025-T6), Solution and Precipitation Heat Treated (NON
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Product Code:SAE AMS4130
Title:Aluminum Alloy Die Forgings, 4.4Cu - 0.85Si - 0.80Mn (2025-T6), Solution and Precipitation Heat Treated (NONCURRENT Aug 2009)
Issuing Committee:Ams D Nonferrous Alloys Committee
Scope:This specification has been declared 鈥淣ONCURRENT鈥?by the Aerospace Materials Division, SAE, as of August 2009. It is recommended, therefore, that this specification not be specified for new designs.鈥淣ONCURRENT鈥?refers to those materials which may have been widely used previously and which may be required for production or processing of existing designs in the future. The Aerospace Materials Division, however, does not recommend these specifications for future use in new designs.鈥淣ONCURRENT鈥?specifications are available from SAE upon request.
- 上一篇：SAE AMS4921 Titanium Bars, Wire, Forgings, and Rings, Commercially Pure, 70 ksi (483 MPa) Yield Strength
- 下一篇：SAE AMS5506 Steel, Corrosion and Heat Resistant, Sheet, Strip, and Plate, 13Cr (0.30 - 0.40C) (SAE 51420), Annealed
【英文标准名称】:Photography(Film)-Plastic,WoodorMetalCores-Dimensions
【原文标准名称】:摄影(胶片).塑料,木质或金属芯的尺寸
【标准号】:ANSIPH1.13-1965
【标准状态】:作废
【国别】:
【发布日期】:
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:
【中国标准分类号】:
【国际标准分类号】:
【页数】:
【正文语种】:
【英文标准名称】:StandardTestMethodforDeterminingtheMolarMassofChitosanandChitosanSaltsbySizeExclusionChromatographywithMulti-angleLightScatteringDetection(SEC-MALS)
【原文标准名称】:用多角度光散射器尺寸筛析色谱法(SEC-MALS)测定壳聚糖和壳聚糖盐摩尔质量的标准试验方法
【标准号】:ASTMF2602-2008e1
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:F04.42
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:Chitosansalts;Sizeexclusionchromatographywithmulti-anglelightscatteringdetection(SEC-MALS);Tissueengineeredmedicalproducts(TEMPs)
【摘要】:Thedegreeofdeacetylationofchitosan,aswellatthemolarmassandmolarmassdistribution,determinesthefunctionalityofchitosaninanapplication.Forinstance,functionalandbiologicaleffectsarehighlydependentuponthecompositionandmolarmassofthepolymer.Thistestmethoddescribesproceduresformeasurementofmolarmassofchitosanchloridesandglutamates,andchitosanbase,althoughitinprincipleappliestoanychitosansalt.Themeasuredmolarmassisthatforchitosanacetate,sincethemobilephasecontainsacetateascounterion.Thisvaluecanfurtherbeconvertedintothecorrespondingmolarmassforthechitosanasabase,ortheparentsaltform(chlorideorglutamate).Lightscatteringisoneofveryfewmethodsavailableforthedeterminationofabsolutemolarmassandstructure,anditisapplicableoverthebroadestrangeofmolarmassesofanymethod.Combininglightscatteringdetectionwithsizeexclusionchromatography(SEC),whichsortsmoleculesaccordingtosize,givestheabilitytoanalyzepolydispersesamples,aswellasobtaininginformationonbranchingandmolecularconformation.Thismeansthatboththenumber-averageandmass-averagevaluesformolarmassandsizemaybeobtainedformostsamples.Furthermore,onehastheabilitytocalculatethedistributionsofthemolarmassesandsizes.Multi-anglelaserlightscattering(MALS)isatechniquewheremeasurementsofscatteredlightaremadesimultaneouslyoverarangeofdifferentangles.MALSdetectioncanbeusedtoobtaininformationonmolecularsize,sincethisparameterisdeterminedbytheangularvariationofthescatteredlight.Molarmassmayinprinciplebedeterminedbydetectingscatteredlightatasinglelowangle(LALLS).However,advantageswithMALSascomparedtoLALLSare:(1)lessnoiseatlargerangles,(2)theprecisionofmeasurementsaregreatlyimprovedbydetectingatseveralangles,and(3)theabilitytodetectangularvariationallowsdeterminationofsize,branching,aggregation,andmolecularconformation.Sizeexclusionchromatographyusescolumns,whicharetypicallypackedwithpolymerparticlescontaininganetworkofuniformporesintowhichsoluteandsolventmoleculescandiffuse.Whileinthepores,moleculesareeffectivelytrappedandremovedfromtheflowofthemobilephase.Theaverageresidencetimeintheporesdependsuponthesizeofthesolutemolecules.Moleculesthatarelargerthantheaverageporesizeofthepackingareexcludedandexperiencevirtuallynoretention;theseareelutedfirst,inthevoidvolumeofthecolumn.Molecules,whichmaypenetratetheporeswillhavealargervolumeavailablefordiffusion,theywillsufferretentiondependingontheirmolecularsize,withthesmallermoleculeselutinglast.Forpolyelectrolytes,dialysisagainsttheelutionbufferhasbeensuggested,inordertoeliminateDonnan-typeartifactsinthemolarmassdeterminationbylightscattering(1,2).However,inthepresentmethod,thesizeexclusionchromatographystepprecedingthelightscatterdetectionisanefficientsubstituteforadialysisstep.ThesampleisseparatedonSECcolumnswithlargeexcessofelutionbufferfor30to40min,anditisthereforeinfullequilibriumwiththeelutionbufferwhenitreachestheMALSdetector.1.1Thistestmethodcoversthedeterminationofthemolarmassofchitosanandchitosansaltsintendedforuseinbiomedicalandpharmaceuticalapplicationsaswellasintissueengineeredmedicalproducts(TEMPs)bysizeexclusionchromatographywithmulti-anglelaserlightscatteringdetection(SEC-MALS).AguideforthecharacterizationofchitosansaltshasbeenpublishedasGuideF2103.1.2Chitosanandchitosansal......
【中国标准分类号】:C10
【国际标准分类号】:11_120_10
【页数】:7P.;A4
【正文语种】:英语