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  • 简介:生物技术的最新进展给蚕、蜜蜂和其他重要经济昆虫的遗传操作提供许多方法,特别是DNA直接转化为研究这些昆虫提供一个有希望的方法。尽管转化蚕和蜜蜂的尝试已有若干报道(Miline等,1986;田村等,1990),但要发展DNA导

  • 标签:转座因子经济昆虫蜜蜂杂交带转化载体果蝇
  • 简介:目的建立一种简便、快捷、准确的检测方法用于近交系小鼠的遗传检测。方法根据近交系小鼠的H-2基因序列设计相应的探针,并标记生物素,利用微孔板Southern杂交技术,使探针与模板DNA杂交,再加入亲和素标记的辣根过氧化物酶进行酶显色反应,通过酶标仪检测杂交结果,以确定近交系小鼠的基因型。结果57BL/6和C57B:/10为H-2^b型;DBA/2和Scid为H-2^d型;615和C3H为H-2^k型;NCPC/2、TA1、TA2和T739均为H-2^b型。结论通过Southern杂交检测可以确定近交系小鼠的基因型。该检测方法简便、易行,检测结果客观,可以应用于近交系小鼠的遗传检测。

  • 标签:SOUTHERN杂交H-2基因近交系小鼠
  • 简介:两种风马牛不相及的产品组合在一起,创造出一种新的品类,具有某些让消费者迫切想拥有的功能。这种看似随机无意的混搭,能够产生惊人的效果,实际上是经过了品牌经理无数次探询和试验,才得以“灵光乍现”。

  • 标签:产品组合品牌经理消费者
  • 简介:把Niya节的地质的记录基于多索引的合成研究,它具有在Tarim盆的南部的边缘的高分辨率,和在南部的Xinjiang的另外的地质的记录,这篇论文重建了自从大约4.00kaBP,paleoclimatic的历史在这个区域变化。在最后4.00ka期间,南部的Xinjiang的区域经历了相对寒冷湿、相对的温暖干燥的时期的引申。三个显著寒冷湿的时期(4.00-3.45kaBP,2.50-1.90kaBP,ca。1.40?1.00kaBP)并且三个温暖干燥的时期(3.45-2.50kaBP,1.90-1.40kaBP,1.00kaBP礼品)被识别。人的活动在南部的Xinjiang与古气候的进化有一种亲密关系,这被显示出。

  • 标签:SOUTHERNXINJIANGHISTORICALCLIMATECHANGES
  • 简介:SeismicanisotropybeneathSouthernTibetQING-TIANLUI(吕庆田),KAI-YIMA(马开义),MEIJIANG'(姜枚),A.HirnandA.Nercessian(InstituteofMineralDe...

  • 标签:TibetanPlateauANISOTROPYSHEAR-WAVESPLITTINGupper
  • 简介:Sedimentaryfaciesisanimportantfactorinfluencingshalegasaccumulation.Itnotonlycontrollshydrocarbongeneration,butalsoaffectsreservoircharacteristicsanddistribution.ThispaperdiscussestheLowerSilurianLongmaxiFormationinthesouthoftheSichuanBasin.Outcrop,core,drillingandloggingdataidentifythesedimentaryfaciesoftheformationascontinentalshelffacies,whichisdividedintotwosubfacies:aninnershelfandanoutershelfsubfacies.Thesetwosubfaciescanbefurtherdividedintosevenmicrofacies:muddysiltyshallowshelf,calcareoussiltyshallowshelf,muddylimyshallowshelf,stormflow,muddydeepshelf,siltymuddydeepshelfandcontourcurrentmicrofacies.Verticalandhorizontaldistributionofmicrofaciesestablishesasedimentationmodelofthecontinentalshelffacies.Combinedwithanalizationorcalculationofgeochemical,mineralogical,physicalandgas-bearingpropertiesofsamples,sedimentarymicrofaciesisevaluatedusingnineparameters:totalorganiccarboncontent,effectiveshalecontinuousthickness,vitrinitereflectance,kerogentype,mineralcomponents,porosity,permeability,watersaturationandgascontent.Theevaluationrevealedthatthemostfavorablefaciesforshalegasexplorationanddevelopmentarethemuddydeepshelfandpartofthesiltymuddydeepshelfmicrofacies,withTOCmorethan2%,siliceouscomponentover50%,claylessthan30%,porositymorethan3%,watersaturationlowerthan40%,gascontentgreaterthan2m3/t.Theseresultsprovideatheoreticalbasisfordeciston-makingonthemostpromisingareasforshalegasexplorationintheSichuanBasinandformarineshalegasexplorationanddevelopmentinSouthChina.

  • 标签:四川盆地龙马溪组下志留统页岩气沉积相地层
  • 简介:摘要华裔和中国文化因素是贯穿彼得?凯里整个创作的一个重要主题,在他的小说中较为真实地再现了华裔在澳国历史上的处境。凯里的创作打破了澳国文学史上对华裔和中国的类型化表述,同时也强调了某些类型化表述。在澳大利亚的民族认同中,由于白澳政策的长期存在和深远影响,使得备受压制的华裔的族裔认同走向了社会主流认同的反面。然而,华裔的这种反向认同也促进了澳大利亚以白人为主的民族认同的形成。

  • 标签:彼得?凯里华裔文化认同套话
  • 简介:以19个欧洲丁香品种为亲本,进行了38个杂交组合的人工杂交授粉和杂交种子播种试验。结果表明,有26个杂交组合能够正常结实,但结实率差异较大,其中有5个杂交组合的结实率达到90%以上;杂交种子播种后,有25个组合能够正常出茁。但出苗率差异很大。通过对杂交授粉结实率和杂交种子出苗率的统计分析,探索了欧洲丁香不同品种间人工杂交亲和力的强弱,为今后丁香杂交苗的培育及优良单株的筛选奠定了基础。

  • 标签:欧洲丁香杂交组合亲和力结实率出苗率
  • 简介:通过综述国内外杜鹃花自然杂交与远缘杂交的研究,归纳了前人在杜鹃花自然杂交以及远缘杂交取得的成果,杜鹃花自然杂交现象较为频繁,自然杂交后代的发现能大大缩短杜鹃花育种进程.远缘杂交主要存在花粉管生长异常、胚败育、杂交苗白化三个问题,通过一定技术手段可以解决.尽管杜鹃花远缘杂交整体成功率较低,亲本间可配性差异大,然而远缘杂交能够创造新种质、转移目标性状,同时有助于研究种间亲缘和进化关系.

  • 标签:杜鹃花育种自然杂交远缘杂交
  • 简介:使用每月的风和海面温度(SST)数据,在印度洋与印度洋偶极子模式(IOD)事件联系的南部的南方的大气循环房间第一次被描述并且检验。分叉的风和压力vertical速度为大气循环房间的鉴定被采用。在积极IOD事件的四个不同阶段期间,在西方的印度洋上的异常南方的哈德利发行量证明空气在更低的对流层在热带,在上面的对流层的流动杆病房,在画热带的水池,和回来升起回到热带。在东方印度洋上的塞诺马劳斯·哈德利循环在西方的印度洋上对那相反。在积极IOD事件期间,当它在西方的印度洋上被加强时,在东方IndianOcean上的南方的哈德利发行量被削弱。在IOD索引和哈德利房间的索引之间的相关分析也证明那,大气循环模式在在记录的时期上的每个IOD事件是明显的。

  • 标签:印度洋IOD表面温度大气循环
  • 简介:InSeptember2002,"OrganizingofNationalRareEarthEnterprisesGroup"whichwasdeliveredbyoriginalNationalEconomy&TradeCommitteeandoriginalNationalPlanningCommittee,MinistryofFinanceP.R.C,MinistryofLand&ResourceP.R.C.andMinistryofForeignEconomy&Trade,wasapprovedbytheStateCouncilofP.R.C.toorganizeSouthernandNorthernRareEarthGroups.OnOctober30,2002,ChinaNorthernREGroupCo.,LtdPreparationTeamheldthefoundationconventioninBaotou,whichdrewthecurtainof...

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  • 简介:THEyear2006seesthelaunchoftheChinesegovernment'scampaignto'buildanewsocialistcountryside.'Aftermorethan20yearsofreformandopening-up,thefocusisnowonChina'shugeruralpopulation.The

  • 标签:中国新农村建设农民收入生活水平
  • 简介:TheanalysisoftherelationshipbetweenseaiceinArcticandAntarctic,andtheSouthernOscillationIndex(SOI)variationonthetemporalscaleofmonth,seasonandyearismadeinthispaper.ThenegativecorrelationbetweenseaiceinArcticandtheSOI.andthepositivecorrelationbetweenseaiceinAntarcticandtheSOIarefound.ThevariationofseaiceinAntarcticPacificseemstoplayanimportantroleintheinfluencetoatmosphere.Theirnonlinearrelationshipspresentmorestronglythanthelinearrelationshipbetweenthem.TherelationshipbetweenseaiceinArcticandAntarcticandtheSOIintheearlystageisinvestigated.Theirvariationshowsperiodicphenomena.ThemaximumcorrelationisusedtobuildthemodelforforecastingthevariationoftheSOIontheconditionoftheseaiceinArcticandAntarctic.Theexplainedvarianceofthesimulatedseriesisgreaterthan0.90.Thereexistsa17-monthperiodintherelationshipbetweenseaiceinArcticandAntarcticandSOI.Theexistingofthecommonfactorwithlargerscaleisdiscussedinthispaper.

  • 标签:analysisoftimeSCALEnonlinearRELATIONSHIP
  • 作者:Viegi GiovanniBaldacci SandraMaio SaraFasola SalvatoreAnnesi-Maesano IsabellaPistelli FrancescoCarrozzi LauraLa Grutta StefaniaForastiere Francesco
  • 学科:医药卫生>
  • 创建时间:2020-08-10
  • 出处:《中华医学杂志(英文版)》2020年第13期
  • 机构:National Research Council (NCR) Institute for Biomedical Research and Innovation (IRIB), 90146 Palermo, Italy; National Research Council (NCR) Institute of Clinical Physiology (IFC), 56126 Pisa, Italy,National Research Council (NCR) Institute of Clinical Physiology (IFC), 56126 Pisa, Italy,National Research Council (NCR) Institute for Biomedical Research and Innovation (IRIB), 90146 Palermo, Italy,Department of Epidemiology of Allergic and Respiratory Diseases, Sorbonne Université and INSERM, Institut Pierre Louis d'Épidémiologie et de Santé Publique, F75012 Paris, France,Department of Cardiothoracic and Vascular, University Hospital of Pisa, 56124 Pisa, Tuscany, Italy,Department of Surgical, Medical, Molecular Pathology and Critical Area, University of Pisa, 56126 Pisa, Tuscany, Italy
  • 简介:AbstractObjective:To summarize the main updated evidence about the health effects of air pollution, with a special focus onSouthernEurope.Data sources:Literature was obtained through PubMed Central and the official websites of European Agencies and Scientific Societies.Study selection:Recent shreds of evidence about the health effects of air pollution coming from international reports and original research were collected and described in this review.Results:Air pollution is an avoidable risk factor that causes a huge burden for society, in terms of death, health disorders, and huge socio-economic costs. ThesouthernEuropean countries face a more threatening problem because they experience the effects of both anthropogenic pollutants and natural dusts (particulate matter [PM]). The European Environment Agency reported the number of premature deaths in the 28 countries of the European Union attributable to air pollutant exposure in the year 2016: 374,000 for PM2.5, 68,000 for nitrogen dioxide, and 14,000 for ozone. In Italy, time series and analytical epidemiological studies showed increased cardiorespiratory hospital admissions and mortality, as well as increased risk of respiratory diseases in people living in urban areas.Conclusions:Based on abundant evidence, the World Health Organization, which hosts the Global Alliance against Chronic Respiratory Diseases (GARD), the scientific respiratory societies, and the patients’ associations, as well as others in the health sector, must increase their engagement in advocacy for clean air policies.

  • 标签:EnvironmentRespiratory disordersEpidemiology
  • 简介:袁隆平是世界著名的杂交水稻专家,是我国杂交水稻研究领域的开创者和带头人,为我国和世界粮食生产和农业科学的发展做出了杰出的贡献,被誉为“杂交水稻之父”。

  • 标签:杂交水稻袁隆平高中生物备课参考
  • 简介:“出优势”的这一说法.我想凡是有几年养鸽经历的人.可能都是耳熟能详的。但是信鸽杂交出优势的基本原理是什么?杂交需要具备什么条件?以及如何保持杂交优势.使其优势一代代的遗传下去。且一代胜过一代。这就不是一件容易的事情。

  • 标签:信鸽饲养技术饲料气候条件
  • 简介:论述了龙眼有性杂交的各个技术环节,包括花粉采集及处理、母本花穗的选择及处理、授粉、保果以及存在问题等,为开展龙眼杂交育种提供参考。

  • 标签:龙眼有性杂交技术
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