简介:SystemofProvidingTEGas¥LiXuekuan;HeYusheng;ZhuLianfang;ChenXuebing;SuYouwuandJiaoDunpangThesystemofprovidingTEgasforcylinderf...
简介:Theabsorptionofsingle-cav计yanddouble-cavityoptomechanicalsystemsandperiodicoptomechanicallatticeshaspreviouslybeeninvestigatedextensively.Inthispaper,wepresenttheabsorptionofanonperiodiccavitychain.wheretheabsorptionvalueontheresonancepointshowsswitchabledipsorpeaks,accordingtowhethertheoptomechanicalinteractionisatanoddoreven-numberedpositioninthechain.Meanwhile,thevalueofabsorptionduetotheoptomechanicalinteractionvarieswiththenumberofthebarecavities.Thecalculatedresultsmayhavesomenovelapplications,suchasdetectingthepositionofthemovablemirrorinalongcavitychain,whichwouldbeusefulinquantuminformationprocessingbasedonoptomechanicalsystems.
简介:目的分析心肌致密化不全(noncompactionofventricularmyocardium,NVM)儿童T波峰末间期(Tp-Te)、校正的Tp-Te间期(Tp-Tec)、Tp-Te与QT间期的比值(Tp-Te/QT)等心肌复极指标的变化及其临床意义。方法收集34例住院NVM患儿作为NVM组,随机选取健康儿童34例作为对照组,比较两组12导联体表心电图心率、校正的QT间期(QTc)、Tp-Te、Tp-Tec及Tp-Te/QT等指标。结果34例NVM患儿中5例(14.7%)并发室性心律失常(室性早搏4例,室性心动过速1例)。NVM组心率较对照组明显加快,差异有统计学意义[(128.8±21.8)次/minvs.(113.1±17.5)次/min,P〈0.05]。两组QTc、Tp-Te比较,差异均无统计学意义[(404.8±30.9)msvs.(402.6±21.4)ms,(76.1±17.3)msvs.(72.1±13.9)ms,P均〉0.05]。NVM组与对照组比较,Tp-Tec明显延长,Tp-Te/QT明显升高,差异均有统计学意义[(112.7±26.8)msvs.(98.6±16.6)ms,(0.27±0.06)vs.(0.23±0.04),P均〈0.05]。结论儿童NVM存在跨室壁复极离散度的异常,易导致室性心律失常的发生。由于心率等因素的影响,Tp-Tec、Tp-Te/QT对儿童NVM发生室性心律失常的预测价值高于Tp-Te。
简介:MicrodosimetricSpectrumandRadialDoseDistributionof239PuαRayinTEGas¥ZhuLianfang;LiXuekuan;ChenXuebing;HeYusheng;SuYouwuandJiao...
简介:MicrodosimetricSpectrumandRadialDoseDistributionof252CfαRayinTEGas¥ZhuLianfang;LiXuekan;ChenXuebing;HeYusheng;SuYouwuandJi?..
简介:AbstractObjective:The relationship between mitochondrial DNA (mtDNA) polymorphisms and abnormalities in sperm quality has been the subject of several studies, with the objective of improving the treatment of male infertility. This study, which contributes to the identification of genetic markers of sperm abnormalities, was conducted to study mtDNA mutations in the asthenozoospermia profile.Methods:This case-control study included 30 patients with asthenozoospermia and 28 with normospermia after spermogram and spermocytogram analyses. After the extraction of total DNA from the spermatozoa of 58 ejaculates from these individuals using the phenol-chloroform method, the amplification of genes of interest in mtDNA using specific primers was performed by conventional polymerase chain reaction, and sequencing was used to detect mutations.Results:Male patients with asthenozoospermia in the tertiary sector had significantly more mutant- than wild-type (P = 0.0005) MT-CO II genes. Similarly, for the same gene, males with asthenozoospermia and primary infertility had significantly more mutants than the wild-type (P = 0.001). Sequencing revealed 29 mutations that were observed only with asthenozoospermia, which could be the basis for low sperm mobility.Conclusion:This study identified several mutations in mtDNA genes that could be considered genetic markers of asthenozoospermia if confirmed in a deeper study.