学科分类
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63 个结果
  • 简介:EversincethenuclearbombingatHiroshimaandNagasakiin1945,nuclearweaponshavebecomeoneofthedefiningelementsinshapingtheworldstrategicsituationforbetterorworse.TheendoftheColdWarhasledtodramaticchangesintheworldsecuritylandscape.Theinternational

  • 标签: 加甜 入户
  • 简介:Thenonchromatinproteinousresidueofthecellnucleuswasrevealedinourlaboratoryasearlyasin1948andthenidentifiedbylightandelectronmicroscopyasresidualnucleoli,intranuclearnetworkandnuclearenvelopebefore1960,Thisstructuretermedafterwardsas'nuclearresidue','nuclearskeleton','nuclearcage','nuclearcarcass'etc.,wasmuchlater(in1974)isolated,studiedandentitledas'nuclearmatrix'byBerezneyandCoffey,towhomthediscoveryofthisresidualstructureisoftenwronlyascribed.Therealhistoryofnuclearmatrixmanifestationisreportedinthispaper.

  • 标签: 核碎片 细胞核 核基质 分部分离 历史
  • 简介:China’snuclearindustryisgoingtomakegreateruseofitsREmetalstogivefullplaytoitsenergy-producingtechnology.TheChinaNationalNuclearCorporation(CNNC)willconcentrateonthedevelop-mentofREpermanentmagnets,REfluore-scence,andREceramics.Theseproducts,alsohighprioritiesinthedevelopmentplanfortheREindustryinthecomingsixyears,areallhi-techandenergy-savingproducts.

  • 标签: NUCLEAR PERMANENT ceramics CONCENTRATE SAVING URANIUM
  • 简介:SinceAugust2005,IranononesideandtheUnitedStatesandtheEuropeancountriesontheotherhavebeenlockedinarangleovertheIrannuclearissueandtensionhassteadilyescalatedtoacriticalpointasbothsidessticktoanuncompromisingposition.InearlierJune2006,inordertobreakthedeadlock,theEU,withU.S.blessing,onceagainofferedIrananewpackageofincentivesinan

  • 标签: 阴山 五让 理川 小曲 对力 曲唱
  • 简介:Weisolatedandpurifiedmitochondriafrommouseliversandspinachleaves.WhenaddedintoeggextractsofXenopuslaevis,theycausednucleiofmouselivertoundergoapoptoticchanges.Chromatincondensation,marginationandDNAladderwereobserved.Afterincubatingisolatedmitochondriainsomehypotonicsolutions,andcentrifugingthesemixturesatmghspeed,wegotmitochondrialsupernatants.Itwasfoundthatintheabsenceofcytosolicfactor,thesupernatantalonewasabletoinduceapoptoticchangesinnuclei.Theeffectivecomponentswerepartlyofprotein.DNAfragmentationwaspartlyinhibitedbycaspaseinhibitorsAC-DEVD-CHOandAC-YVAD-CHO.Meanwhile,caspaseinhibitorsfullyblockedchromatincondensation.Primarycharacterizationofthenuclearendonuclease(s)inducedbymitochondrialsupernatantswasalsoconducted.ItwasfoundthatthisendonucleaseisdifferentfromendonucleaseG,cytochromec-inducednuclease,orCa^2+-activatedendonuclease.

  • 标签: 分离线粒体 诱导 核凋亡 核酸内切酶
  • 简介:Thenuclearmatrixattachmentregions(MARs)andthebindingnuclearmatrixproteinsinthe5'-flankingcisactingelementsofthehumanε-globingenehavebeenexamined.UsinginvitroDNA-matrixbindingassay,ithasbeenshownthatthepositivestage-specificregulatoryelement(ε-PREII,-446bp--419bp)upstreamofthisgenecouldspecificallyassociatewiththenuclearmatrixfromK562cells,indicatingthatε-PREIImaybeanerythroidspecificfacultativeMAR.IngelmobilityshiftassayandSouthwesternblottingassay,anerythroid-specificnuclearmatrixprotein(ε-NMPk)inK562cellshasbeenrevealedtobindtothispositiveregulatoryelement(ε-PREII).Furthermore,wedemonstratedthatthesilencer(-392bp--177bp)upstreamofthehumanε-globingenecouldassociatewiththenuclearmatricesfromK562,HELandRajicells.Inaddition,thenuclearmatrixproteinspreparedfromthesethreecelllinescouldalsobindtothissilencer,suggestingthatthissilencerelementmightbeaconstitutivenuclearmatrixattachmentregion(constitutiveMAR).Ourresultsdemonstratedthatthenuclearmatrixandnuclearmatrixproteinsmightplayanimportantroleintheregulationofthehumanε-globingeneexpression.

  • 标签: 核基质蛋白 K562细胞 结合区 人ε珠蛋白基因 基因表达 分子调节机制
  • 简介:Coactivatorsandcorepressorsregulatetranscriptionbycontrollinginteractionsbetweensequence-specifictranscriptionfactors,thebasaltranscriptionalmachineryandthechromatinenvironment,Thisreviewconsidertheaccessofnuclearandsteroidreceptorstochromatin,theiruseofcorepressorsandcoactivatorstomodifychromatinstructureandtheimplicationsfortranscriptionalcontrol.Theassemblyofspecificnucleoproteinarchitecturesandtargetedhistonemodificationemergeascentralcontrollingelementsforgeneexpression.

  • 标签: 类固醇激素受体 核受体 染色质结构重建 调节 转录
  • 简介:<正>TheceremonyforissuingtheinstrumentofratificationonfirstfuelloadingtoUnit.1ofTianwanNuclearPowerPlantwasholdonOctober23thisyear.TheStateEnvironmentalProtectionAdministrationissuedthisinstrumentattheceremony.Onthesameday,ninety-fivegroupsofPWRfuel

  • 标签: NUCLEAR CEREMONY instrument starts issued Jiangsu
  • 简介:ConstructionofLing’aoNuclearPowerPlantinGuangdongProvince,thecountry’ssecond-largestnuclearpowerprojectbetween1996-2000,chalkedupnotableprogressthisyear.OnJuly,15,allforeignsuppliersintheprojectweregivenofficialnoticethatbothsidesshouldstarttoimplementthecontracts."Themovemarkedasignificantstepforwardintheproject’sconstruction,"saidZengWenxing,GeneralManagerofLing’aoNuclearPowerCoLtd,setupinSeptember

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  • 简介:客观:在在人的创伤的奔流和正常透镜的上皮的房间之间的原子factor-KB(NF-κB)的表示学习差别。方法:全部的RNAof前面的囊标本从受不了创伤的奔流做半量的RT-PCR并且在在他们之间的NF-κB的表示进行差别的分析的正常cadaveric眼睛施主和那些在显微镜下面被拿。结果:作为与在正常控制组的0.8337的平均数相比,NF-κB的表示等价物为在创伤的奔流患者的透镜的上皮的房间是0.9074,并且差别具有显著意义(t=2.447,P<0.05)因此。结论:NF-κB是可能的对必要的一种抄写因素维持正常透镜的上皮的房间的新陈代谢。在创伤的奔流患者可得到的更高的NF-κB“透镜的上皮的房间工具NF-κB具有到创伤的奔流的出现和开发的可能的关联的s。

  • 标签: 核因子-ΚB 创伤 白内障 基因表达
  • 简介:Since2003,theIrannuclearissuehasattractedworldwideattention.Thisistheworld’smostprotractedandmostinfluentialconfrontationbetweenasuperpowerandabigIslamiccountrysincetheendoftheColdWar.AstheIrannuclearissuehasabearingonthemaintenanceoftheinternationalnuclearnon-proliferationsystem,theUnitedNations,theInternational

  • 标签: 鲜笋 刀刃 切胶 刀比 民心 明心
  • 简介:在新ZWILAGnuclear浪费处理植物(瑞士)的不同踪迹元素和收音机核种的命运被建模,以便在植物预言并且检查不稳定的种类和他们的分发的运输行为。计算从药为活跃废物显示出那,工业,仅仅Zn和C有的研究(米尔浪费)在1200℃的稳定的气体的种类。调查证实清洗系统的检验烟道气体的效率。

  • 标签: 核污染 热处理 气体净化 示踪元素 重金属
  • 简介:IntheGCMwestudysomepropertiesofπmesonastheGoldstonebosonsinanuclearmatterwithfinitedensity.Usingtheeffectiveactioninanuclearmatter,wecalculatethedecayconstantandπmassasfunctionsofthechemicalpotential.Therelationbetweenthechemicalpotentialandthedensityofanuclearmatterisfirstlygivenhere.Wefindthatfπandmπmonotonouslydecreaseasnuclearmatterdensityincreases.Theresultisconsistentwiththeusualassumptionthatthechiralsymmetryisgraduallyrestoredasthedensityofanuclearmatterincreases.

  • 标签: 原子核物质 π介子性质 核物质有限密度