简介:
简介:摘要目的探讨血清胱抑素C及尿β2-微球蛋白在高胆红素血症足月新生儿中的表达及临床意义。方法选取2013年9月份~2015年6月份入我院就诊的高胆红素血症足月新生儿50例,设为观察组,另选取同期正常足月儿18例作为对照组。检测两组新生儿血清胱抑素C和尿β2-微球蛋白含量以及胆红素含量,并进行分析比较之间的关系。结果观察组血清胱抑素C及尿β2-微球蛋白均明显高于对照组,两组相比较具有统计学意义(P<0.05);且在观察组中,随着新生儿胆红素含量的增高,其血清胱抑素C和尿β2-微球蛋白含量均增高。结论血清胱抑素C和尿β2-微球蛋白均是反应肾功能的有效指标,研究结果中其值变化与胆红素含量的关系表明,血清胱抑素C和尿β2-微球蛋白可作为高胆红素血症肾功能损害的早期诊断指标,值得临床推荐应用。
简介:Inthiswork,theinfluenceofCO2onthestructuralvariationandcatalyticperformanceofNa2WO4/Mn/SiO2foroxidativecouplingofmethanetoethylenewasinvestigated.ThecatalystwaspreparedbyimpregnationmethodandcharacterizedbyXRD,RamanandXPStechniques.AppropriateamountofCO2inthereactantgasesenhancedtheformationofsurfacetetrahedralNa2WO4speciesandpromotedthemigrationofOinMOx,Na,Wfromthecatalystbulktosurface,whichwerefavorableforoxidativecouplingofmethane.WhenthemolarratioofCH4/O2/CO2was3/1/2,enrichedsurfacetetrahedralNa2WO4speciesandhighsurfaceconcentrationofOinMOx,Na,Wweredetected,andthenhighCH4conversionof33.1%andhighC2H4selectivityof56.2%wereobtained.WithfurtherincreaseofCO2inthereagentgases,thecontentofactivesurfacetetrahedralNa2WO4speciesandsurfaceconcentrationofOinMOx,Na,Wdecreased,whilethatofinactivespecies(MnWO4andMn2O3)increaseddramatically,leadingtolowCH4conversionandlowC2H4selectivity.ItcouldbespeculatedthatNa2WO4crystalwastransformedintoMnWO4crystalwithexcessiveCO2addedunderthereactionconditions.PretreatmentofNa2WO4/Mn/SiO2catalystbymoderateamountofCO2beforeOCMalsopromotedtheformationofNa2WO4species.