简介：介绍了阻变存储器及其I-V特性的测试分析方法。通过测量三明治结构的阻变存储器的I-V特性,采用多种拟合方法,与导电机制原理对比,可以判断器件的导电机制,便于深入分析阻变机理。

简介：TP333.42002053608超高密度信息存储/分子存储及其存储机理=Ultrahighdensitydatastorageandmolecularrecording[刊,中]/高鸿钧,时东霞,张昊旭,林晓(中科院物理所凝聚态物理中心.北京(100080))//物理.—2001,30(8).—453-455在有机功能纳米薄膜上通过扫描隧道显微技术实现了超高密度的信息存储。实验与理论计算的结果表明,其存储机理是薄膜的导电性质的变化。图3参10(李瑞

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简介：TP333.42002010377DVD光学头读出物镜设计=Designofpick-upob-jectivelensesforDVD[刊,中]/郭培基,余景池,樊仲维(中科院长春光机所应用光学国家重点实验室.吉林,长春(130022))∥光电子·激光.—2001,12(1).—4-6

简介：TP333.42002021250准线性区光盘聚焦自动预搜索机制的研究=Investi-gationonautomaticsearchmechanisminquasi-linear-regionforopticaldiskfocusing[刊,中]/蔡忠平,徐端颐,潘龙法(清华大学光盘国家工程研究中心.北京(100084))∥光电工程.—2001,28(1).—16-18,26

简介：TP333.42000031824光盘光学系统标量衍射理论的有效性分析=Validityanalysisofscalardiffractiontheoryinopticalsystemofopticaldisk[刊,中]/成先富,贾惠波,徐端颐(清华大学精密仪器与机械学系,光盘国家工程研究中心.北京(100084))//清华大学学报.自然科学版.—1999,39(8).—53-55,59分析了标量衍射理论的能量计算误差,用耦合波理论分析了入射波偏振态的影响。计算表明TM波和TE波的衍射特性与标量理论的结论相差极大,TM波和TE波的衍射行为也有差别。图3参6(李瑞琴)

简介：TP333.498963677光盘信息处理的理论分析=Theoreticalanalysisonopticaldiscinformationprocessing[会,中]/宋贵才,李雄,陈亚孚(长春光机学院.吉林,长春(130022))//全国第八次光纤通信暨第九届集成光学学术会议.—湖北武汉,97.10

简介：DNA计算是近年来信息领域提出的一种全新的计算理念和模式,具有传统电子计算机不可比拟的优点。简要介绍了DNA计算的基本概念、特点、发展历程,4种基本的DNA计算模型及其应用,最后对DNA计算进行了展望。

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简介：ThebindingofCo(bpy)2dppz3+tocalfthymusDNAwasinvestigatedbyusingabsorptionandemissionspectroscopy,DNAmeltingtechniques,cyclicvoltammetry,viscosityandelectro-phoresismeasurements,wherebpyis2,2’-bipyridyl,dppzisdipyrido[3,2-o:2’,3’-c]phenazine.Thebindingcompoundshowsabsorptionhypochromicity,fluorescenceenhancement,andincreasingofDNAmeltingtemperatureandthespecificviscosity.CVmeasurementshowstheshiftsinoxidation-reductionpotentialandchangeinpeakcurrentwithadditionofDNA.ThecompoundisalsoshowntobemoreefficientphotosensitisersforstrandbreaksinplasmidDNA.

简介：DNAcondensationisanimportantprocessinmanyfieldsincludinglifesciences,polymerphysics,andappliedtechnology.Inthenucleus,DNAiscondensedintochromosomes.Inpolymerphysics,DNAistreatedasasemi-flexiblemoleculeandapolyelectrolyte.Manyagents,includingmulti-valentcations,surfactants,andneutralpoorsolvents,cancauseDNAcondensation,alsoreferredtoascoil–globuletransition.Moreover,DNAcondensationhasbeenusedforextractionandgenedeliveryinappliedtechnology.ManyphysicaltheorieshavebeenpresentedtoelucidatethemechanismunderlyingDNAcondensation,includingthecounterioncorrelationtheory,theelectrostaticzippertheory,andthehydrationforcetheory.Recentlyseveralsingle-moleculestudieshavefocusedonDNAcondensation,sheddingnewlightonoldconcepts.Inthisdocument,themulti-fieldconceptsandtheoriesrelatedtoDNAcondensationareintroducedandclarifiedaswellastheadvancesandconsiderationsofsingle-moleculeDNAcondensationexperimentsareintroduced.

简介：TheeffectofCdionsonsalmonspermDNAwasstudiedbymeansofcirculardichroism(CD),Ramanspectroscopy,X-rayphotoelectronspectroscopy(XPS)andfluorescencespectroscopy.TheCDspectralandfluorescentprobe-acriflavineresultsindicatethattheDNAunderwentaconformationchangeupontheadditionofCdions.XPSandRamanstudiesrevealthatthereexistedinteractionsbetweenCdionsandthephosphategroupsoftheDNA.Inaddition,anewbandappearedat803cm-1intheRamanspectra,whichcanbeattributedtocharacterizing"marker"bandofA-DNA.ItisconcludedthatCdionscanbecoordinatedbythephosphategroupsoftheDNAandinducetheconformationchangesoftheDNAfromB-DNAtoA-DNA.

简介：HydrolysisofDNAisanimportantenzymaticreaction,butitisexceedinglydifficulttomimicinthelaboratorybecauseofthestabilityofhydrolysisofDNA.Inthispaper,thecleavageactivityofcomplexesformedbetweenCu(Ⅱ)andfourdifferentaminoacidoraminoacidmethylesteronDNAisstudiedbygelelec-trophoresis.ItisfoundthatDNAcouldbecleavedbyCu(Ⅱ)-L-HisandCu(Ⅱ)-L-Hismethylestercomplexesandtheefficiencyofcleavageislargelydependentonthemetalion-to-ligandratio.FurtherexperimentsshowthatthecleavageofDNAmediatedbyCu(Ⅱ)-L-HiscomplexesoccursviaahydrolyticmechanismandtheactivechemicalspeciesthataffectsDNAcleavageisproposedtobeMI2H+andML2H22+.

简介：针对数值计算中的乘法计算,通过编码特定的DNA分子,将所有计算中可能出现的DNA分子链设定为特殊结构的DNA分子库,建立数值乘法DNA计算的自装配模型。相对于已有的针对数值计算的DNA计算模型,这种计算模型的优点是采用了并行计算的方式,特别在计算位数比较多时,表现出DNA计算极度并行的优点,使计算更加有效。虽然讨论的是十进制数的乘法,但其方法也适用于任意的N进制乘法运算。

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简介：AdoublehelixmodelofchargetransportinDNAmoleculeisgivenandthetransmissionspectraoffourDNAsequencesareobtained.ThecalculatedresultsshowthatthetransmissioncharacteristicsofDNAarenotonlyrelatedtothelongitudinaltransportbutalsotothetransversetransportofmolecule.Theperiodicsequencewiththesamecompositionhasstrongerconductionability.Withtheincreasingofbasescomposition,theconductiveabilityreduces,buttheweightofθdirectionrisesinchargetransfer.

简介：TQ5942005053594电子俘获光存储材料的最新研究进展=Thelatestdevel-opmentofelectrontrappingmaterials[刊,中]／王欣姿(北京交通大学光电子技术研究所．北京(100044)),王永生…∥光电子技术与信息．-2005,18(2)．-6-10分类介绍了近年来几种典型的电子俘获材料在发光机理和应用方面的最新进展,尤其重点介绍了新兴的玻璃陶瓷型电子俘获材料的研究工作情况。图2参20(严寒)

简介：O4382005021197FDTD方法对固体浸没透镜的光场分析=AnalysisoftheopticalfieldofsolidimmersionlensbyFDTD[刊,中]／张东玲(河南大学物理与信息光电子学院．河南,开封(475001)),白永林…//光子学报．-2004,33(7).-884-888采用二维时域有限差分(2D-FDTD)方法研究了高斯光束通过固体浸没透镜(SIL)的光场分布特性。模拟结果

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

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