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简介：Muscovitemicasheetswithathicknessof12mwereirradiatedbyswiftheavyionsKrandBifromHeavyIonResearchFacilityinLanzhou(HIRFL).Theuencesrangefrom11010to11012ions/cm2.Theelectronicenergyloss(dE/dx)eincreasesfrom5.9to31.5keV/nm.ThevibrationalmodicationsinirradiatedmicawereinvestigatedbyFourier-transforminfraredspectroscopyandthelatenttrackswereobservedbytransmissionelectronmicroscope(TEM).Theinfraredspectrumshowsthatmotionsfromallatomtypesinthemuscovitemicastructurecouldbefoundinmodesforallvibrations.AsshowninFig.1,theintensityofallvibrationalmodesinmica,includingtheOHstretchmotionat3621cm??1,decreasedwiththeincreasing(dE/dx)e.Thesimilartendencyisfoundinsamplesirradiatedbyswiftheavyionswithincreasingionuence.Itisindicatedthatdefectsandstructuralmodicationsgeneratedduringswiftheavyionirradiation,andmoredefectsareintroducedbyirradiationwithhigherionuence.

简介：Understandingthehealtheffectsofexposuretospaceradiationisofparticularimportancebecauseofthemountinginterestindeepspaceexploration.Heavyionssuchas56Fearemainradiationsourcesindeepspace,whichcouldposeasignificanthazardtospaceflightcrewsduringandaftermissions[1].ComparedtoX-rays,56FeionshasthemostdeleteriouseffectsonsurvivalandlevelsofDNAdamage[2].

简介：分析研究了《分子物理学与热力学》课程结构体系，教学内容的特点，将《热学》和《热力学．统计物理》中的热力学部分有机地结合在一起，整合成一门结构合理，体系完整的《分子物理学与热力学》，经过几年的教改实践，取到了好的教学效果。

简介：对聚对苯二甲酸乙二醇酯（polyethyleneterephthalate,PET）纤维分别进行了酸、碱、盐处理,测量获得了处理前后PET纤维的拉曼光谱。分析表明,当拉曼频移在200~1750cm~（-1）时,经NaOH处理的PET纤维的拉曼峰强度高于未经处理的PET纤维,当拉曼频移大于1750cm~（-1）时,经NaOH处理的PET拉曼峰强度低于未经处理的PET纤维,且荧光背景减弱;经H_2SO_4处理的PET拉曼峰强度显著低于未经处理的PET纤维;经CuSO_4处理的PET拉曼峰强度较未经处理的PET纤维明显增高。同时,NaOH、CuSO_4和H_2SO_4对PET纤维的拉曼光谱强度及不同振动模式所对应的拉曼峰寿命有影响。

简介：Nuclearmassisoneofthefundamentalquantityofatomicnucleus.Thetotalbindingenergyofanucleusderivedfromtherelatedmassvaluesreflectsalltheinteractionsamongtheconstitutingnucleons.Massesofshort-livedA=2Z+3nucleiof112SnprojectilefragmentshavebeenmeasuredattheexperimentalcoolerstorageringCSRe,employingtheIsochronousmassspectrometry(IMS).TheexperimentwasconductedattheHeavyIonResearchFacilityinLanzhouatthebeginningof2016.Theprimarybeamof112Sn35+wasaccumulatedinthesynchrotronCSRmandacceleratedto467.91MeV/u.Secondarybeamwereproducedbyimpingingthehighintensity112Sn35+beamontoa10mmberylliumtargetwhichwaslocatedattheentranceoftheradioactivebeamlineRIBLL2.Theprojectilefragmentsof112Snemergedfromthetargetwerethentransmitted,separatedinflightthroughRIBLL2andfinallyinjectedintoCSRe.

简介：AnewgeneralizedJacobiellipticfunctionmethodisusedtoconstructtheexacttravellingwavesolutionsofnonlinearpartialdifferentialequations(PDEs)inaunifiedway.Themainideaofthismethodistotakefulladvantageoftheellipticequationwhichhasmorenewsolutions.Morenewdoublyperiodicandmultiplesolitonsolutionsareobtainedforthegeneralized(3+1)-dimensionalKronig-Penny(KP)equationwithvariablecoefficients.Thismethodcanbeappliedtootherequationswithvariablecoefficients.

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简介：Menofreproductiveageundergoingradiotherapyareoftenconcernedaboutthepossibleeffectsonfertilityandfuturechildren[1].Inthisinvestigation,serumtestosteronewasmeasuredfollowingwhole-bodyirradiationwitha2Gycarbonionradiation(CIR),andimmunofluorescencewereusedtoinvestigateproteinlocalizationthatevaluatetheunderlyingtoxicologicalmechanismofacuteinjuryinducedbyCIRinpubertalmicetestes.

简介：TheDNA-dependentproteinkinasecatalyticsubunit(DNA-PKcs)playsamajorroleinDNAdamagesignalingandrepair,andisalsofrequentlyover-expressedintumormetastasis.WeusedisogeniccelllinesexpressingdifferentlevelsofDNA-PKcstoinvestigatetheroleofDNA-PKcsinmetastaticdevelopment.Interestingly,ourresultsshowedthatX-rayirradiationinducedthemetastasisofDNA-PKcspositive(M059K)butnotnegative(M059J)cells;however,genisteincouldsuppresstheradiation-inducedmetastaticpotentialofM059Kcells(Fig.1).Theconcretemechanismsunderlyingthisphenomenonwillbeinvestigatednextyear.

简介：Thispaperreportsthathexagonal-phaseLaF3:Yb30.20,Er30.02andLaF3:Yb30.20,Tm30.02nanocrystals(NCs)weresynthesizedviaahydrothermalmethod.Thetransmissionelectronmicroscopy,selectedareaelectrondiffraction,powderx-raydiffraction,andthermogravimetricanalysisareusedtocharacterizetheNCs.Under980nmexcitation,theYb3/Er3andYb3/Tm3codopedNCscolloidalsolutionspresentbrightgreenandblueupconversionfluorescence,respectively.TheseNCsshowefficientinfrared-to-violetandinfrared-to-visibleupconversion.TheupconversionfluorescencemechanismsofLaF3:Yb30.20,Er30.02andLaF3:Yb30.20,Tm30.02NCsareinvestigatedwitha980-nmdiodelaserasexcitationsource.

简介：Thisworkpresentsthesaturableabsorption（SA）propertiesofCsPbBr3perovskitequantumdots（QDs）.TheperovskiteQDsshowexcellentSAperformancewithanonlinearabsorptioncoefficientof-35×10-2cm∕GWandafigureofmeritof3.7×10-14esucm.Further,theiruseassaturableabsorbersinapassivelyQ-switchedvisiblesolid-statelaserforthegenerationofsolitonpulsesisdemonstrated.TheseresultsdemonstratethepotentialfortheperovskiteQDstoactassaturableabsorbers.

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简介：Weperformfirst-principlecalculationsforthestudyoftheorthorhombicRb2Cd2(SO4)3structure.Electronicenergybands,totalandpartialdensitiesofstatesarereportedandanalysed.Itisfoundthatoxygenatomic2pelectronsstronglyhybridizewithRb/orCd4dandS2pstates,resultingintwo-typeionicgroupswithweakcouplings.Itisshownthatmacroscopicdomainwallsoriginatefromsuchweak-couplingionicgroups,arisingatthecellboundaries.Theasymmetriccationbonds(Rb-OandCd-O)andthesubsequentrotationsoftheS04tetrahedracanleadtothedrivingforceoftheferroelectricbehaviour.Thepredictedpyroelectriccurrenteffectsareobservedexperimentallyintheferroelectricphase.

简介：研究了ＹＢａＣｕ３Ｏ６～７超导催化剂上ＣＯ２的加氢制醇反应。考察了温度、压力和空速等条件对催化剂反应性能的影响。反应的主要产物是甲醇、ＣＯ和少量甲醚。利用ＸＰＳ、ＸＲＤ和ＡＦＭ等技术对催化剂的结构、铜的存在状态和反应活性位进行表征发现，在反应过程中，ＹＢａ２Ｃｕ３Ｏ６～７由ｏｒｔｈｏｍｂｉｃ相转变为ｔｅｔｒａｇｏｎａｌ相。反应活性位可能是Ｃｕ（Ｉ）物种。反应后催化剂颗粒的分散程度明显提高

简介：在这份报纸，我们在场一三维(3D)在为收音机频率的晶片水平的真空包装技术微机电的系统(RFMEMS)共鸣器，低损失的硅vias在被用来播送RF发信号。Au-Sn焊接结合被采用象电的导体一样提供真空封装。封装帽子的一个RF模型被建立评估包装的寄生效果，它提供3DRFMEMS封装的一个有效设计答案。与建议包装结构，24dB的signal-to-background比率(SBR)被完成，以及共鸣器的优秀因素(Q因素)在包装以后从8000～10400增加。包装共鸣器有线性频率温度(英尺)在在0楨?慰数?之间的一个温度范围特征?牵敶?牡?牰癯摩吗？？