简介：

简介：继2010年销售额过千亿后，万科在“限购”的2011年销售额又过千亿，达1215亿元。这真是件值得庆贺的事。但我相信，大多数万科人对这一结果并不十分在意，更令他们自豪的也许是这千亿背后的战略思想与卓越运营。

简介：Electrophoresis,chromatography,immunoassay,sequencingandothertimeconsumingap-proacheshavebeendevelopedtodetermineDNAbasemismatching,oxidativelesionorstrandbreaks.Sometimes,however,onlyqualitativeinformationisenoughtodecidewhethermutationhashappenedtoDNAanditsextent.Convolutionspectrometry(CS),anewtechniquetodiscoverultrafmedifferenceonultraviolet(UV)absorptionofdifferentsubstances,isoriginallyemployedtofindoutanysubtlemutationofDNAinducedbyUVradiation.Muta-tiveDNAiscomparedwithegocriteriabasedonthespectraoftheformerDNA,anydifferenceisquantitativelyex-pressedbydispersion(5).Visiblechangescannotbeobservedonsecond-derivativespectrauntilthemutationgets5upto11.48%.DimethylsulfoxideisanintensifierofUV254nminducedDNAmutationandprotectorat365nm,whichissimplyconfirmedbyincreasinganddecreasing5.Everyconvolutionproceduretakeslessthan1min.Convolutionspectrometryprovidesafast,simple,sensitiveandinexpensivealternativetodetermineDNAmutation,andtoscreenanti-mutationalmedicines.

简介：DNA复制这一类型题的考察重点主要是DNA半保留复制的特点，DNA复制与细胞分裂过程中染色体行为的变化规律及标记技术（同位素标记技术）相整合，随着DNA的复制碱基突变等．

简介：学校品牌建设，说到底是一种文化建设。它最原始、最本真的表象，应该是一所学校与众不同的文化浸润——学校品牌建设的DNA。

简介：本文为人教版高中生物新教材DNA分子结构的教学设计，力求立足新教材优势，以高一学生智力特点为基础，充分体现新课标理念。

简介：Adetectionofanthracyclineantitumordrugdaunomycin(DNR)reactingwithDNAinsimulatemetabolisminvitrohasbeenmade.ItwasfoundthatDNRcouldreactwithDNAtoformDNR-DNAadducts.TheadductcompositionsofDNRwithfishspermDNAandthermallydenaturatedDNAweredetermined.TheequilibriumassociationconstantKofDNRwithfishspermDNAis1.98×10^5L/molandthatofDNRwithdenaturatedDNAis2.29×10^4L/mol.Semiquinonefreeradicals,metabolicproductsofDNR,candestroybothfishspermDNAanditsthermallydenaturatedDNA.ItisverifiedbyhyperchromiceffectincreaseobservedinUVspectrumandAFMexperiments.ThemechanismofDNAdegradationhasalsobeeninvestigated.Resultsobtainedallowonetoexplainthereasonofsideeffectofanthracyclinedrugandgivethewaytodepress,whichwereofclinicalsignificance.

简介：Eelfamilyisahugeone,inwhichmanykindsofeelsespeciallysomemigratoryeels,bearstrongresemblancetoeachother,andarethereforedifficulttobeidentified.Inthisstudy29randomprimerswereusedtomakeRAPDanalysisforJapaneseseel(Anguillajaponica),Europeaneel(Anguillaanguilla)andPikeeel(Muraenesoxcinereus).Andtotally299fragmentswerecounted.Sharedorspecificfragmentswerecountedandgeneticsimilarityorgeneticdistancewerecalculated.ThegeneticsimilaritybetweenJapaneseeelandPikeeelis0.68andthegeneticdistancebetweenthemis0.32;thosebetweenEuropeaneelandPikeeelare0.72and0.28respectively,andbetweenJapaneseeelandEuropeaneelare0.74and0.25respectively.Themethodhasbeenshowntobesuitabletomolecularidentificationofeels.Itprovidesanalternativeapproachtodeterminetherelationshipbetweenspecies.

简介：随着男性不育症发病率的升高,精液常规检测已不足以精确评估男性生育力。近年来,精子DNA损伤检测作为一项评估精子质量及男性生育力更精准的指标,逐步成为生殖医学领域的研究热点。精子DNA损伤的机制包括精子发生异常、氧化应激损伤、精子凋亡异常等。目前,精子染色质结构分析法（SCSA）已经成为检测精子DNA完整性的金标准。精子DNA损伤可能与男性不育、辅助生殖结局及后代生长、发育相关。笔者拟就精子DNA损伤的机制、检测方法、对男性生育力的影响及其与辅助生殖技术的关系进行综述,旨在为男性不育症的临床诊断提供依据。

简介：

简介：

简介：AvohammetricstudyoftheinteractionofneutralRed(NR)withDNAatagoldelectrodeinaphosphatebuffersolutionisdescribed.AfteraddingDNAinanNRsolution,thereductionpeakcurrentofNRdecreases.ThebindingmeehahismsofNRtoDNAindifferentpHrangesaredifferent.ThereductionpeakpotentialofNRinapH7.0phosphatebuffersolutioninthepresenceofDNAshiftspositively,indicatingthatthebindingofNRtoDNAisintercalationaction,butatpH=6.0thereductionpeakpotentialofNRshiftsnegatively,indicatingthatthebindingofNRtoDNAiselectrostaticaction.TheformedcomplexesareDNA-NRwhen[NR]/[DNA]<0.18andDNA-3NRwhen[NR]/[DNA]>0.35,respectively.

简介：DNA聚合酶III是为DNA的复制负责的五eubacterialDNA聚合酶之一双。在DNA聚合酶III核心酶的十个子单元之中，高山哈子单元两个都为polymerizing催化反应DNA海滨。在这研究，我们提取了高山的genomic序列哈从159的子单元定序eubacterial染色体，并且执行了基于顺序的种系发生、结构的分析。我们发现所有eubacterial染色体有至少一座高山哈子单元，哪个形式homodimers或heterodimers。种系发生并且领域高山的结构的分析以及拷贝数字变化哈在每个细菌的子单元显示高山的分类哈子单元进四个基本的组：polC，dnaE1，dnaE2，和dnaE3。这个分类具有在染色体作文分析的本质。我们也巩固了命名惯例在基因注解避免进一步的混乱。

简介：应用DNA技术开展警犬优良品种保纯和培育,是提高我国警犬技术工作科技含量的重要举措,对于促进我国警犬技术与国际警犬技术接轨,通过警犬DNA数据库对警犬资源的遗传质量进行实时监测和管理,在保持我国警犬技术的可持续发展中将发挥重要作用.

简介：云计算可以改变什么？ICT的业态，企业的商业模式，社会生活……而IDC给出的数字量化指标是，未来五年，公有和私有云计算服务上的支出将在全球创造近1400万个工作岗位，其推动的IT创新预计每年会带来1．1万亿美元的新业务收入。

简介：1案例简介2002年1月5日凌晨，宜昌市某村发生一起蒙面入室抢助案，受害人罗某夫妇被一伙蒙面歹徒持刀砍伤，并抢走部分财物。接到报案后，区公安分局侦技人员立即赶赴现场开展侦破工作，经勘察现场，仅在距中心现场60余米处的一田坎下提取到数枚烟头，同时在侦察中发现外来人员向某与李某有作案嫌疑，但李某去向不明，传唤向某，因无

简介：Moleculardynamics(MD)simulationsareperformedtostudyadhesionandpeelingofashortfragmentofsinglestrandDNA(ssDNA)moleculefromagraphitesurface.Thecriticalpeel-offforceisfoundtodependonboththepeelingangleandtheelasticityofssDNA.FortheshortssDNAstrandunderinvestigation,weshowthatthesimulationresultscanbeexplainedbyacontinuummodelofanadhesiveelasticbandonsubstrate.Theanalysissuggeststhatitisoftenthepeakvalue,ratherthanthemeanvalue,ofadhesionenergywhichdeterminesthepeelingofananoscalematerial.

简介：Aminoglycosides(AmAn)arewidelyusedfortheirgreatefficiencyagainstgram-negativebacterialinfections.However,theycanalsoinduceototoxichearingloss,whichhasaffectedmillionsofpeoplearoundtheworld.Aspreviouslyreported,individualsbearingmitochondrialDNAmutationsinthe12SrRNAgene,suchasm.1555A>Gandm.1494C>T,aremorepronetoAmAn-inducedototoxicity.Thesemutationscausehumanmitochondrialribosomestomorecloselyresemblebacterialribosomesandenableastrongeraminoglycosideinteraction.Consequently,exposuretoAmAncaninduceorworsenhearinglossintheseindividuals.Furthermore,awiderangeofseverityandpenetranceofhearinglosswasobservedamongfamiliescarryingthesemutations.StudieshaverevealedthatthesemitochondriamutationsaretheprimarymolecularmechanismofgeneticsusceptibilitytoAmAnototoxicity,thoughnuclearmodifiergenesandmitochondrialhaplotypesareknowntomodulatethephenotypicmanifestation.

简介：MtDNAwassuccessfullyextractedfromtenindividualbones(femurs)inthetombsofancientJushiinTurfanbasin,datedbacktotheyearabout3000-2500yearsago.Bymeansoffouroverlappingprimers,wegotnucleotidesequenceofthe218bplength.AncientmtDNAwasanalyzedbythesequencingofhypervariableregionⅠofthemtDNAcontrolregion.Theresultshowsthat9haplotypeswith24polymorphicsiteswereobtained.ThephylogeneticanalysisindicatedthatMongoliansandAltaiarethepopulationgeneticallyclosesttotheJushigroupsandJushimtDNApoolbeinganadmixtureofeasternAsianandEuropeanlineages.SoourpreliminarydataimplythatanancientminglingofEuro-AsianpopulationhadexistedinTurfanbasinpriortotheearlyIronAge.

简介：在源于mitochondrial机能障碍的氧化phosphorylation的改变长被假设了涉及tumorigenesis。线粒体最近被显示了在调整规划房间死亡和房间增长起一个重要作用。而且，mitochondrialDNA(mtDNA)变化在各种各样的癌症房间被发现了。然而，在tumorigenesis的这些mtDNA变化的角色仍然保持大部分未知。这评论集中于基本mitochondrial遗传，mtDNA变化和与癌症联系的结果的mitochondrial机能障碍。潜在的分子的机制，调停从mtDNA变化的致病和到tumorigenesis的mitochondrial机能障碍也被讨论。