简介:摘要目的探讨真菌细胞壁(1-3)-β-D葡聚糖体外检测的影响因素。方法实验组将白色假丝酵母菌分别用正常血浆、无热原蒸馏水、0.9%的生理盐水、0.02%两性霉素B生理盐水和0.75%氟康唑生理盐水稀释为0.05麦氏单位(含白色假丝酵母菌1×107CFU/ml),对照组将上述各液稀释100倍,采用免疫沉淀试验(G试验)检测其10次(1-3)-β-D葡聚糖含量,并进行体外培养,以此探讨生理盐水、抗真菌药物对(1-3)-β-D葡聚糖体外检测的影响。结果实验组中,正常血浆葡聚糖含量为(92.5±14.2)ug/L,蒸馏水组含量为(94.5±15.2)ug/L,生理盐水组含量为为(93.6±14.8)ug/L,两性霉素B组含量为(95.5±16.2)ug/L,氟康唑组(97.3±16.8)ug/L,经统计检验组内结果间无显著性差异(P>0.05)。对照组中正常血浆含量为(6.8土2.7)ug/L,蒸馏水组含量为(6.1±2.4)ug/L,生理盐水组含量为为(7.3±2.0)ug/L,两性霉素B含量为(6.8±2.5)ug/L,氟康唑组(6.7±2.8)ug/L,经统计检验组内间结果无显著性差异(P>0.05)。实验组与对照组比较有显著差异(P<0.05)。结论体外真菌细胞壁(1-3)-β-D葡聚糖含量变化与液体介质无关,与真菌治疗药物无关,与真菌数量密切相关。
简介:采用热重-微分热重技术研究了1-L-谷氨酸-1-脱氧-D-果糖的热失重和裂解温度,通过在线裂解气质联用技术分别分析研究了无氧和有氧条件下1-L-谷氨酸-1-脱氧-D-果糖在300℃、600℃、750℃和900℃四个温度的热裂解产物。研究结果表明1-L-谷氨酸-1-脱氧-D-果糖的裂解温度为161.3℃,在700℃时失重达到90.50%。无氧和有氧条件下裂解产物的种类和数量随着裂解温度升高而增多,有氧条件下裂解产物总数稍多于无氧条件,但种类有明显差异。无氧裂解和有氧裂解产物主要为酮类、吡咯类、吡啶类、呋喃类、吡嗪类、吲哚类以及少量芳香族化合物。有氧热裂解产物的香韵分析结果表明1-L-谷氨酸-1-脱氧-D-果糖裂解产物具有烘烤香、坚果香、甜香、花香、奶香等香韵。
简介:Objective:Tofindoutthebasicconditionsofmycosisinfectionoffull-termpregnantwomen.Methods:Fungusisolationandidentificationfromthevaginalsecretionsandoralspecimensfrom208full-termpregnantwomenwerecarriedoutbyfungicultureandidentifiedfollowingstandardbiologicalpractice.Results:Thepositivedetectionrateforvaginalfungiwas51.92%andfororalfungiitwas47.59%.20.19%hadfungiinboththevaginalandoralcavity.ThefungifoundweremainlyofthespeciesCandidaalbicans.Conclusion:Theprevalenceoffungalmycosisinfectioninfull-termpregnantwomenwashigherthanthatusuallyfoundinnon-pregnantwomen.Inordertopreventfurthercomplicationsandmateral-childtransmission,seriousattentionshouldbepaidtothishighprevalencefinding.
简介:完整的波形倒置(FWI)直接最小化在合成、观察的数据之间的错误。为表面获得几何学,从深反射镜产生的思考是敏感的压垂组织,因此更新宏速度模型在是合理的一从上到下举止。为水平地分层的结构统治的模型,偏移量/时间weighting和经常的更改深度控制(CUDC)的联合为剥去层的FWI是足够的。CUDC要求光线跟踪在经常的深度决定思考traveltimes。作为模型复杂性增加,多路径效果将不得不被考虑。我们开发了利用抑制地震思考数据的一个新剥去层的FWI方法,它不需要CUDC并且光线跟踪。数字例子证明有效更改深度(EUD)能被甚至在复杂区域抑制常数控制,倒置结果比常规方法更精确。
简介:Athermalconductionmodelisappliedtospeedupthenumericalanalysisofthetemperaturedistributionandtheweldpoolgeometryoffullpenetrationingastungstenarc(GTA)welding.Withconsideringbothtopandbottomfreesurfacedeformationoffull-penetratedweldpool,three-dimensionalweldpoolwithmeltingfrontandsolidificationfrontispredicted.Weldingexperimentsareconductedtomeasurethemeltingfrontcurvesatthetopsurfaceandthelongitudinalsectionoftheweld.Itshowsthatthepredictedandmeasuredresultsareingoodagreement.
简介:Anovelsystemconfigurationoffiberopticsensorbasedonopticalabsorptionisproposed.Severalcompensationmeasuresarediscussed.Asimulatedexperimentisdesignedandtheoutputcurveofsystemisgiven.Theexperimentalresultshowsthatthesecompensationmeasuresareeffectiveondynamicdisturbanceswhicharecausedbybackgroundlightandopticalfiberbend,Inaddition,thedriftsinthelightsourceintensity,fiberlosses,andphotodetectorefficiencyareaslocompensated.
简介:Wefocusonthefullrelativisticquantummechanicalcalculationsfromborontofluorineatomswithelectronicconfigurationof1s22s22pn(n=1,2,3,4,and5),where1s22s2istheclosedshelland2pnistheopenshell.Theiractiveelectronsintheopenshelloccupyallthesixspinorsasfaraspossible.Therefore,wesuggestanewrulecalled'maximumprobability'forthefullsymmetrygrouprelativistictheory.Furthermore,thespectralfinestructureoftheatomicgroundstatesbasedonthefullrelativistictheoryandtheirintervalsofL-Ssplittingareallreasonable.ItisimpossibletocalculatetheL-Ssplittingthroughnon-relativisticquantummechanics.Therelativisticeffectofatomicmassisincreasedsignificantlybyabout12foldsfromboronatomtofluorineatom.