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407 个结果
  • 简介:Aim:TocomparetherecoveryrateofmorphologicallynormalandchromatincondensedspermatozoafromnativesemensamplesusingtheSpermPrepTMfiltrationcolumnsandPercollgradientcentrifugationandtodeterminetheinfluenceofthetwoprocessingtechniquesonfertilizationandpregnancyratesinanIVF-ETprogram.Methods:Sixteensemensamplesobtainedfrompatient'shusbandwereincludedinthisstudy.Eachwasdividedintotwoaliquots.ThefirstaliquotwasprocessedwithSpermPrepTMfiltrationcolumnsandthesecond,Percollgradientcentrifugation.Smearsweremadebeforeandaftersemenprocessingwithbothmethodsfortheevaluationofchromatincondensation(chromomycineCMA3)aswellasmorphology(strictcriteria)ofspermatozoa.Onehundredandseventyoocyteswereretrievedfromthepatientsandtheoocytesfromeachpatientweresubdividedintotwosets:onesetwasinseminatedusingspermatozoaprocessedwithSpermPrepTMandtheotherinseminatedaftersemenprocessingwithPercollgradientcentrifugation.Resuits:ThePercollmethodyieldedasignificantlyhigherpercentageofchromatincondensed(90.8±6.5%vs82.3±8.8%,P=0.017)andmorphologicallynormalspermatozoa(12.9±7.4%vs6.9±4.8%,P=0.001)incomparisontoSpermPrepTM.Whereas,spermcountrecoveryratewassignificantlyhigheraftertheuseofSpermPrepTMthanafterthePercollgradientcentrifugation.Thefertilizationratewassimilarbetweenthetwomethods.Conclusion:SemenprocessingwithPercollshouldberecommendedforintracytoplasmicsperminjectionasthenaturalselectionisbypassedandtheSpermPrepTMtechniquecouldberecommendedfor1VFandIUIprogramsasthespermconcentrationplaysamoresignificantroleintheseprocedures.

  • 标签: TM IUI IVF-ET
  • 简介:Afieldexperimentwasconductedfrom1999to2002tocompareandevaluatetheeffectsofnutrientandwaterregimesonpaddysoilqualitybyinvestigatingsoilchemicalandmicrobiologicalparameters.Fournutrientregimes,acontrol,chemicalfertilizersonly(CF),chemicalfertilizerswithswinemanure(SM),andchemicalfertilizerswithwheatstraw(WS),andtwosoilmoistureregimes,continuouswaterlogging(CWL)andalternatewettinganddrying(AWD),wereinvestigated.WithSMandWStotalorganiccarbonandtotalnitrogeninthepaddysoilweresignificantlyhigher(P<0.05)thanthosewithCF.AsimilareffectfororganicamendmentswasobservedinthesoillightfractionorganicC(LFOC),water-solublecarbohydrates(WSC),andwater-solubleorganicC(WSOC).CWL,inparticularwhenswinemanurewasincorporatedintothepaddysoil,markedlydecreasedsoilredoxpotential(Eh)andincreasedtotalactivereducingsubstances(ARS).Meanwhile,ascomparedtoCF,SMandWSsignificantly(P<0.05)increasedsoilmicrobialbiomassC(MBC)andmineralizablecarbon,withdifferencesinAWDbeinghigherthanCWL.Inaddition,SMandWStreatmentssignificantly(P<0.05)improvedriceabove-groundbiomassandgrainyield,withAWDbeinggreaterthanCWL.Thus,forecologicallysustainableagriculturalmanagementofpaddysoils,long-termwaterloggingshouldbeavoidedwhenorganicmanurewasincorporatedintopaddysoil.

  • 标签: 土壤肥力 生物指数 营养体系 水分 水稻土质量
  • 简介:在50个非粘的米饭变化(线)的Wx基因的突变而产生之遗传的变化被使用微卫星标记RM190分析[为(CT)_n简单顺序重复(SSR)]并且劈开的放大多态的顺序(帽子)标记484/W2R-ACCI[为G/T单个核苷酸多型性(SNP)]。六同型结合(CT)_n打字,也就是(CT)_(20),(CT)_(19),(CT)_(18),(CT)_(17),(CT)_(16),(CT)_(14),(CT)_(11)并且(CT)_(10),和异质接合的遗传型(CT)_(11)/(CT)_(18)为RM190被检测,哪个(CT)_(11)并且(CT)_(18)是占优势的。TwohomozygousWx遗传型(G/G和T/T)和遗传型异质接合(G/T)与RM190用材料的484/W2R-ACCI.Most被检测(CT)_(11)是为484/W2R-ACCI的SNP的G/G,当为SNPwas的T/T主要出现在材料与时(CT)_(18)。测试的材料能是一起使用二个标记的组织into10范畴。结果显示直链淀粉内容的59.3%变化被归因于RM190揭示的Wx基因的多型性,当在直链淀粉的56.1%变化和24.6%内容和胶化一致性是时分别地由484/W2R-ACCI揭示了到Wxgene的多型性。与SSR和帽子标记,而且,在直链淀粉内容的72.4%变化能被解释。另外,使近交的二个标记的申请前景也被讨论。

  • 标签: 遗传多样性 品种 水稻 基因
  • 简介:Thisarticleistrytoexplainoranalyzethekeytechnologiesofcontrollingthesurfacequalityoflowcarbonsteelascaststripthroughinvestigationofinterfaceheattransferbetweensolidifiedshellandliquidsteel.Theoneofthekeytechnologiesofcontrollingsurfacequalityoflowcarbonsteelascaststripisthroughthecastingrollsurfacetextureinordertoachievethehomogeneoussolidificationonthecastingroll.Anotheristhroughformingathinfilmonthecastingrollsurfaceinordertoachieveabalancebetweenrapidsolidificationandhomogeneoussolidification.Thisfilmformedbetweenthetwinrollandthemoltensteelcanbecontrolledbyadjustingthechemicalcompositionandinclusioninliquidsteelthroughcontrollingtheamountofall[O]andfree[O].

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  • 简介:重金属的环境质量(Pb,Cd,Cr,同样Hg)在Chongming的农业表面土壤,岛被国家、本地、职业的标准基于大规模调查估计在哪个从蔬菜的28件样品阴谋,来自稻地的65件样品和来自西瓜地的9件样品从整个岛区域被收集。结果证明Pb的平均集中,Cd,Cr,并且Hg是21.6mg????踮

  • 标签: 土壤重金属 郊区农业 环境质量 崇明岛 上海 评价
  • 简介:这篇文章介绍与汽油装备的FCC技术的商业应用程序在在PetroChina哈尔滨石油化学的布朗奇同伴的RFCC单位的辅助反应堆。测试结果为在辅助反应堆升级在FCC石油减少石蜡内容的汽油的商业申请显示出优秀结果。这种技术的申请能在FCC石油把石蜡内容归结为不到35v%。向更严重的条件的FCC操作的调整能进一步在FCC石油把石蜡内容归结为不到20v%,以便FCC石油能满足当前的标准或在完成引人注目的经济、社会的好处的未来满足更紧的说明要求。

  • 标签: 催化裂化 汽油 烯烃 商务应用
  • 简介:基于比赛理论和主要代理人的理论,这篇论文集中于当道德的危险存在时,怎么在供应链控制产品质量和设计质量合同。我们安装了供应商,买主期望利润函数模型,供应商在使生产过程成为投资级的决定并且决定产品质量预防水平,而买主做优秀评估决定并且决定产品质量检查水平。有减少投资水平的道德的危险的供应商可以在生产过程缺乏投资;因此,买主将付信息租金到incentivize改进投资水平的供应商。买主创造夸大产品质量有缺陷者率的道德的危险,在检查的overinvest可以处理。我们使用最佳的条件解决供应商外部失败的第一最好的优秀检查水平,内部惩罚,和分配比率花费了的第一最好的投资水平,产品质量预防水平,和买主。我们也进行显示出下列的模拟测试:当供应商改进它的投资水平时,它的产品质量预防水平将增加,并且买主质量检查水平将减少。当它的期望的利润将减少时,与在买主产品质量检查水平,它的内部惩罚愿望增加,和供应商的改进,外部失败费用将也增加。因此,买主将设计一个刺激合同,哪个将增加的期望的利润,和整个供应链联合期望的利润功能可以成为反的U形状。最后,我们开发一个模拟例子并且在不对称的信息的条件下面在供应链为质量控制策略和合同设计建议建议。

  • 标签: 供应链设计 设计质量 合同设计 道德风险 产品质量检验 风险投资商
  • 简介:BasedonananalysisofmajorrecentsocialeventsinChina,suchasthe2008BeijingOlympicGames,2010ShanghaiWorldExpo,2014NanjingYouthOlympicGames,and2014BeijingAsiaPacificEconomicCooperationConference,mandatory,temporary,andindemnificatoryquantitativepoliciesaimedatprotectingairquality,whichwerecarriedoutbybothcentralandlocalgovernments,madesubstantialcontributionstochangesandimprovementsinairquality.Tosomeextent,thefindingsshowthatcommandandcontrolmeasuresplayasignificantroleinprotectingairquality,whilethelawandeconomicandvoluntaryenvironmentalsafeguardmeasuresdonotduringmajorsocialevents.Therefore,itremindsustheairqualitycouldandwillimprovenotonlyduringmajorsocialeventsbutalsointheregulardaysifweimplementappropriateenvironmentalpoliciesandsafeguardmeasures.

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  • 简介:LuangPrabangProvinceislocatedwithinthearearecognizedasthecenterofrice(OryzasativaL.)diversityinLaoPDR.Thisstudyreportedongrainqualitycharacteristicsof60uplandriceseedsamplessharing49varietynamescollectedfrom6villagesinLuangPrabangin2015.Mostofthesampleshasnon-pigmentedpericarp,whileredpericarpwasfoundinfoursamplesandpurpleinfivesamples.Almostallofthesampleswereoflargegraintype,withglutinousendospermin70%andnon-glutinousendospermin30%.Thebrown(unpolished)ricewasfoundwithawiderangeofgrainnutritionalquality,includingprotein(9.2%±0.9%),Fe(15.9±6.9mg/kg),Zn(19.6±2.1mg/kg),anthocyanin(0.774±0.880mg/g),andanti-oxidativecapacity(2.071±1.373mg/g).Thevarietiessharingsimilarnameshadsimilarmorphologicalcharacteristicsbutvariedinnutritionalconcentration,withrequiredconfirmationingeneticvariationanalysis.Thisstudyfoundthatsomericevarietieswithhighgrainqualitymaybenefitthefarmersdirectlyorcouldbeusedinvarietalimprovementprograms.

  • 标签: GRAIN morphology genetic diversity NUTRITIONAL quality
  • 简介:TheImpactsofLowerPopulationGrowthontheQualityofLifeandEconomicDevelopment:China'sExperienceJiangZhenghua&ZhangLingguangViceMi...

  • 标签: LOWER POPULATION ECONOMIC EXPERIENCE Growth IMPACTS
  • 简介:Foryearssufferingfromhypertension,Mrs.Zhang,nowinher60s,isafrequentvisitortoBeijingDewaiCommunityHospitalinherneighborhood.'Ifeeltoopainstakingtogotoa'bighos-pital,''shesays.'Busesarealwaysovercrowdedandslow,notsuitableforpeoplelikeme.Besides,community-basedmedicalinstitutionschargelessfortreatmentofthesamediseases.'InChina,a'bighospital'isamedicalinstitutionlargeinsizeandfullyequipped,inmanycasesstaffedbysomeofthemostreputedmedicalexpertslocallyornationwide.Meanwhile,community-basedhospitalsandclinicsareoftenreferredtoas'smallhospitals.'

  • 标签: 医疗服务 中国 社区医院 医院管理
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