简介:Inthispaper,theequilibriumsurfacetensionandthedynamicsurfacetensionofaqueousTritonX100solutionattemperature25℃weremeasuredbymeansofWilhelmyplatemethodandmaximalbubblepressuremethodrespectively.Thedeterminedcriticalmicellarconcentration(cmc)ofTritonX-100at25℃is2.2×10^-4mol/dm^3.TheadsorptionmechanicsofTritonX-100atair/solutionwasdetermined.Forthesubmicellarconcentrationsitisdiffusion-controlled.Thediffusioncoefficientwascalculatedfromtheexperimentaldataintherangeofshortlimit.Intherangeoflongtimeadsorption,thesubsurfaceconcentrationisfittedfromthemeasureddynamicsurfacetensions.
简介:ThehydrolysisofcephanoneinTritonX-100micelleandTritonX-100/n-C5H11OH/H2O(O/W)microemulsionwerestudiedbymeansofUV-Visabsorptionspectroscopy.Theresultsshowthatcomparedwithwater,TritonX-100micelleandTritonX-100/n-C5H11OH/H2O(O/W)microemulsioncaninhibitthehydrolysisofcephanone.TheinhibitioneffectsofTritonX-100micelleandTritonX-100/n-C5H11OH/H2O(O/W)microemulsiononthehydrolysisofcephanonearerelatedtothelocationofcephanoneintheinterphasesofTritonX-100micellesandTritonX-100/n-C5H11OH/H2O(O/W)microemulsiondroplets.
简介:摘要笔者对100例骨肿瘤侵犯关节病例进行了x线病例分析。侵犯关节的骨肿瘤以骨巨细胞瘤、骨肉瘤、软骨肉瘤、纤维肉瘤及转移瘤多见。良性骨肿瘤亦可跨越关节。肿瘤直接侵犯关节表现为肿瘤破坏骨性关节面,同时关节内有瘤块。肿瘤还可从关节边缘、关节囊韧带附着处、骨板壳破裂、关节内病理骨折处侵入关节,亦可发生肿瘤性滑膜炎。
简介:分为两只(或更多)并内置解码或播放界面的音箱在使用和摆放上相当灵活,又能带来更佳的声场效果,可作为双声道书架箱或是桌面音箱使用。
简介:采用原位拉伸扫描电镜试验对X100级管线钢的动态塑性形变行为进行观察,并运用EBSD微观取向分析技术对形变前后管体组织的取向变化进行分析。结果表明,X100级管线钢的微观组织由针状铁素体、粒状贝氏体和M/A岛组成。在拉伸应力的作用下针状铁素体首先发生形变,随着应变的增加,针状铁素体形变累积到一定程度后,导致粒状贝氏体发生形变。针状铁素体边界和贝氏体基体上的M/A组织钉扎位错使变形不易发生。由EBSD取向可知,晶体在发生形变后轧面的{110}晶面方向沿拉伸形变方向转动。由扫描电镜照片观察到,在外加应力作用下,夹杂物成为微裂纹形核核心并随着外加应力的增加而扩展,最后连接,导致裂纹贯穿基体直至失效。
简介:ThelocalstructuresoftheimmiscibleFe100-xCuxalloys(x=0,10,20,40,60,80and100)producedbymechanicalalloyinghavebeeninvestigatedbyXAFS.FortheFe100-xCux(x≥40)solidsolutions,thelocalstructuresaroundFeatomschangefrombccstructuretofcconeandtheCuatomsmaintaintheoriginalcoordinationgeometryaftermillingfor160hours.Onthecontrary,thelocalstructuresaroundCuatomsinbothofFe80Cu20andFe90Cu10alloysappearatransitionfromfcctobccstructure.WefoundthattheDebye-wallerfactorσoffccFe-CuphaseislargerthanthatofbccF-Cuphase,andtheσ(0.099A°)aroundFeatomsislargerthanthat(0.089A°)ofCuintheFe100-xCux(x≥40)solidsolutions,ThissuggeststhatthemechanicallyalloyedFe100-xCuxsupersaturatedsolidsolutionisnotahomogeneousalloy,andconsistsofFe-richandCu-richregionsforvariouscompositions.Apossiblemechanismforbcc-to-fccandfcc-to-bccchangesinFe100-xCuxsolidsolutionsisdiscussedinrelationtotheinterdiffusionandtransitioninducedbytheballmilling.