简介:Meiotic前期我是一个长、复杂的阶段。相应再结合是在meiotic前期期间发生在相应染色体之间的一个重要过程我。chiasmata的形成,它一起保持相应染色体直到中期我到后期,我转移,为合适的染色体分离是批评的。最近的研究建议了SPO11蛋白质在产生被认为是相应再结合的起点的双strandedDNA裂缝(DSB)的地点在很多个有机体保存了功能。DSB的这些地点处理要求RecA相当或相同的事物的功能,例如RAD51,DMC1,和其它,由变异的研究建议了;因此,修理这些meioticDSB的失败导致反常chromosomal引申,导致破坏成熟分裂。这些RecA相当或相同的事物的功能上的最近的发现改进了位于meiotic下面的机制的理解相应再结合。
简介:有有限阴极联系的欧姆的阳极接触和注射的一个双性人层模型被建议了计算再结合效率和设备的再结合区域宽度。洞传送层的厚度和联合效率和再结合宽度上的organic/organicinterface的障碍的效果被讨论了。它被发现那:(1)当电子充分被堵住,洞没在theorganic/organic接口显著地被堵住时,为给定的L_h/L,再结合效率与增加应用电压增加,但是在更高应用的电压,有增加L_h/L的再结合效率减少;(2)有增加的再结合效率增加使用了电压andH′_h,并且什么时候使用了电压和H′_h超过某价值,再结合效率作为一个高原出现;(3)有增加应用电压和L_h/L.This模型的再结合宽度减少可能向相对实验解释现象。
简介:TheinfluenceoftemperatureandGacompositiononAugerrecombinationlifetimeinn-typeandp-typeIn1-xGaxAsmaterialsisinvestigatedthroughthesimulation,assumingtheconcentrationsofelectronsandholesare1017cm-3and1018cm-3,respectively.TheresultsshowthatthetemperaturehaslittleinfluenceonAugerrecombinationlifetimeofIn1-xGaxAsmaterialsatx<0.3.However,ithasagreatimpactwhenx>0.3andtheeffectismoreobviousatalowertemperature.Moreover,Augerrecombinationlifetimeofp-typeIn1-xGaxAsislongerthanthatofn-typeIn1-xGaxAswiththesametemperature,Gacompositionandcarriersconcentration.
简介:ThedisproportionatedphasesofNdHx,Fe2B,anda-FefromNd2Fe14BwereappliedtoprepareNdFeBmagnetsbytwodifferentroutes.Theresultsshowthattherouteofannealinginhorizontalvacuumsinteringfurnacecannotreachthepurposeofcompleterecombinationafterthehotpressingandhotdeformationprocessduetothelackofdehydrogenationchannel.Therouteofapplyinglowpressureof4–25MPaontheas-disproportionatedgreencompactduringthedesorptionrecombinationprocessinsituhotdeformationinasparkplasmasintering(SPS)systemcanobtaincompletelyrecombinedNdFeBmagnetwithgoodanisotropyandmagneticproperties.Themaximummagneticproperties,(BH)max=201kJm-3,Br=1.142TandHcj=469kAm-1,areobtainedafterbeingtreatedfor15minat750°Cunderlowpressure.
简介:ByanalyzingthemainrecombinationmechanismsinGaInAsSbmaterials,thedependencesofthedarkcurrentdensityandopencircuitvoltageinn+-pGaInAsSbthermophotovoltaiccellsontherecombinationparameters,carrierconcentrationandcellthicknessarecalculated.Theresultsshowthatthedarkcurrentmainlycomesfromp-region,anditisrelatedwiththesurfaceandAugerrecombinationsinlowandhighcarrierconcentrationranges,respectively.ThesurfaceandAugerrecombinationscanbesuppressedbyreducingthesurfacerecombinationvelocityandcarrierconcentration,respectively.Thedarkcurrentdensitycanbesuppressedbyoptimizingmaterialparametersanddevicesurfacepassivationtechnique.SothehighopencircuitvoltagecanbeobtainedforGaInAsSbthermophotovoltaiccells.
简介:Amethodbasedupontheweightedtotalcrosssection(WTCS)theoryisproposedtocalculatethephoto-ionisationcrosssectionsandtheradiativerecombinationratecoefficientsbetweenthefundamentallevelofCOandthemainelectronicstatesofitscorrespondingion.Totalphoto-ionisationcrosssectionsandradiativerecombinationratecoefficientsaredeterminedfromthecalculationofelementaryvibrationalphoto-ionisationcrosssections.TransitionsbetweenCO~+(X,AandB)andCO(X)areconsidered.Totalphoto-ionisationcrosssectionsandrecombinationcoefficientsarecomputedinthetemperatureinterval500-15000K.
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简介:瞄准:探索可能的效果在中国人口在精子发生上在精子缺乏(DAZ)删除了拷贝簇删除,精子缺乏因素c(AZFc)的删除区域在346个normozoospermic人被分析。方法:三DAZ单个核苷酸变体部位和七个AZFc特定的标注顺序的地点与聚合酶链反应(PCR)被检验限制碎片长度多型性和平淡的PCR。结果:(1.4%)五normozoospermic人被发现有gr/gr-DAZ1/DAZ2的删除。任何一个都没这些人被发现有b2/b4-entireDAZ删除。结论:在有normozoospermia的五个人的gr/gr-DAZ1/DAZ2删除的存在建议这删除本身不能为在中国人的精子发生的缺陷是足够的。