维普中文期刊产品整合服务
647篇 您的检索式:作者名="Wehner"
    题名 作者 年代 出处 被引量
1北京夏季高温高湿和降水过程对大气颗粒物谱分布的影响显示文摘2004—07—13~2004—08—23使用TDMPS-APS系统在线测量颗粒物的数浓度谱分布,并于07—16~07—18选取了高温闷热夜晚、日间高温高湿和雨后晴朗干洁3种天气条件,使用多级串联撞击式采样器(MOUDI)测量颗粒物的质量浓度谱分布,结果表明,高温高湿天气条件下颗粒物的污染、尤其细粒子污染严重,导致很低的能见度(2.5km);PM1.8和PM10的质量浓度分别为170.68μg/m^3和249.35μg/m^3,细粒子质量浓度占PM10的68%;粒径为50~100nm颗粒物的数浓度最高,为2×10^4~3×10^4个/cm^3;降雨过程对粗粒子和细粒子均有去除作用,对细粒子的去除作用尤为明显;降雨后PM10和PM1.8浓度分别比降雨前降低3倍和6倍;降雨过后的晴朗干洁天气有利于新粒子(3~20nm)的生成,生成的新粒子快速长大到50~100nm;随着污染物的累积,以后几天内又变为污染天气.胡敏 刘尚 吴志军 张静 赵云良 Birgit Wehner Alfred Wiedensohler 2006环境科学2006,27,11:117
2重污染和新粒子生成过程中城市大气颗粒物数谱分布演变过程显示文摘使用双电迁移性颗粒物粒径谱分析仪和空气动力学颗粒物粒径谱分析仪对北京城市大气颗粒物(3nm^10μm)数浓度谱分布进行长期观测.选取2006年春节期间出现的一次重污染事件和一次新粒子生成过程,对期间颗粒物数谱分布特征及演变过程进行分析.在重污染事件中3~10nm颗粒物(平均数浓度46cm?3)几乎在大气中消失,而新粒子生成事件中核模态颗粒物数浓度最高达到3.5×104cm?3.这种现象可以通过颗粒物的碰并汇和低挥发性气态前体物的凝结汇从颗粒物的汇和源两个角度进行解释:重污染事件中,3~10nm颗粒物的碰并汇为1.1×10?2~1.2×10?3s?1,显著高于新粒子生成过程(9.9×10?4~1.4×10?4s?1);在新粒子生成过程中,参与成核的低挥发性气态前体物的凝结汇为0.01s?1,显著低于重污染事件(0.13s?1).研究结果表明在分析极端大气环境中的颗粒物数谱分布时,除交通和气象因素外,碰并和凝结过程的影响也需要给予足够的重视.吴志军 胡敏 岳玎利 Birgit WEHNER Alfred WIEDENSOHLEP 2011中国科学:地球科学2011,41,8:17
3黄瓜黑色果刺基因染色体定位及候选基因分析显示文摘【目的】黄瓜作为重要的果菜类蔬菜,果实品质一直是黄瓜育种研究的重点。果实品质包括内在品质和外观品质,其中外观品质对黄瓜的商品性具有重要影响。果刺颜色作为黄瓜重要的品质性状之一,对其进行遗传分析和基因定位将有助于了解果刺颜色遗传的分子机理,为黄瓜果实性状改良提供理论依据和技术支撑,同时也可为刺色基因的精细定位及克隆奠定基础。【方法】研究利用黄瓜白色果刺自交系GY14(P1)和黑色果刺自交系NC76(P2)为亲本构建遗传群体,进行黄瓜果刺颜色的遗传分析。以F2分离群体为试材,应用分离群体分组分析法(BSA)和2 112对SSR引物进行SSR分析,结合9 930黄瓜全基因组序列信息和100份核心种质重测序结果开发新标记,对初定位区域进行标记加密。采用JoinMap 4.0作图软件和MapInspect软件构建连锁群并完成连锁群与染色体的对应,实现黄瓜黑色果刺性状的基因定位。运用生物信息学,在定位区域进行候选基因分析。利用包含156个株系的重组自交系(RILs)群体,对黑色果刺基因紧密连锁的两侧翼分子标记进行验证,确定标记用于分子标记辅助选择(MAS)育种的准确性。【结果】研究表明,黄瓜自交系NC76的黑色果刺符合质量性状遗传特点,由显性单基因B控制,黑色对白色为显性。初步定位筛选获得了与B基因连锁的8对SSR引物,将B定位于黄瓜4号染色体(Chr.4)上,最近的连锁标记为SSR22231,遗传距离为10.8 cM;根据初定位区域的序列信息,设计合成了新的SSR引物212对和Indel引物25对,利用这些引物对双亲和F2群体DNA进行分析,最终构建了一个包含14个SSR标记和1个InDel标记的分子标记连锁群,获得与B连锁的两侧翼标记SSRB-181和SSRB-130,遗传距离分别为2.0 cM和1.6 cM,该区段物理距离为422.1 kb,有60个预测候选基因,推测Csa4G003095和Csa4G001690是与黑色果刺形成相关性较大的候选基因。与B紧密连锁的两侧翼标记用于MAS育种的准确率分别为96.8%和96.2%,其中SSRB-181对黑色果刺植株鉴定的准确率达到100%,将在MAS育种发挥重要作用。【结论】黄瓜自交系NC76的黑色果刺性状由显性单基因控制,该基因位于Chr.4上422.1 kb范围内,两侧翼标记为SSRB-181和SSRB-130,遗传距离为3.6 cM。本研究结果为黑色果刺基因的精细定位和克隆及MAS育种奠定了良好基础。刘书林 顾兴芳 苗晗 王烨 Yiqun Weng Todd C Wehner 张圣平 2014中国农业科学2014,47,1:11
4成熟黄瓜果皮红色性状的遗传分析及其基因定位显示文摘以黄瓜(Cucumis sativus L.)成熟瓜红色果皮自交系‘NCG127’(P1)和成熟瓜黄色果皮自交系‘9930’(P2)为试验材料构建F2遗传群体,对成熟瓜红色果皮R基因进行遗传分析和基因定位研究。结果表明,黄瓜成熟瓜红色果皮性状由显性单基因控制,红色对黄色为显性。以256株F2分离群体为试材,应用群体分离分析(BSA)法筛选得到与R基因连锁的20个多态性SSR标记,构建了R基因的分子标记连锁图谱,将R基因定位到黄瓜4号染色体上,物理距离为213.4 kb的区段内,两侧翼标记为UW019319和UW019203,与R遗传距离分别为0.8 cM和0.7 cM。生物信息学分析表明,该区段存在30个预测候选基因。刘书林 顾兴芳 苗晗 王敏 王烨 Todd C. Wehner 张圣平 2014园艺学报2014,41,2:11
5Evolution of particle number size distribution in an urban atmosphere during episodes of heavy pollution and new particle formation显示文摘This study discusses the evolution of particle number size distribution during episodes of heavy pollution and new particle formation in the urban atmosphere of Beijing to quantify the effects of dynamic processes (coagulation and condensation) on the particle number size distribution.During a heavy-pollution event,an extremely low number concentration of 3-10 nm particles (on average 46 cm-3) was observed.This is because nucleation-mode particles were easily removed by strong coagulational scavenging of larger particles under this condition.In addition,a large condensation sink (on average 0.13 s-1) restrained nucleation,which is one of the major sources of nucleation-mode particles.Conversely,during a new-particle formation event,the small condensation sink (0.01 s-1) of precursor facilitated nucleation.At the same time,preexisting particles had little ability to scavenge newly formed particles (around 1 nm) and allowed them to grow to a detectable size (larger than 3 nm currently).We suggest that the effects of dynamic processes (coagulation and condensation) on particle size distribution should be stressed under some extreme conditions of the relatively polluted urban atmosphere in addition to traffic and meteorological factors.WU ZhiJun, HU Min YUE DingLi Birgit WEHNER Alfred WIEDENSOHLER 2011Science China Earth Sciences2011,54,11:8
6家具机械的SICGE分类法显示文摘从生产流程的角度对某一家具企业的各种家具机械进行SICGE分类,可以为家具机械生产企业的产品研发和推广提供一种基于用户的新观点。SICGE分类法是根据生产设备的通用性和数量对某企业生产设备实行动态分类,还可以为企业进行生产流分析、计划成组技术、识别作业研究和设备管理的重点等提供分析依据。韩维生 Heinrich Koster Marcus Wehner 2010西北林学院学报2010,25,3:2
7Stability of fruit quality traits in diverse watermelon cultivars tested in multiple environments显示文摘Lycopene is a naturally occurring red carotenoid compound that is found in watermelon.Lycopene has antioxidant properties.Lycopene content,sugar content and hollowheart resistance are subject to significant genotype×environment interaction(G×E),which makes breeding for these fruit quality traits difficult.The objectives of this study were to(i)evaluate the influence of years and locations on lycopene content,sugar content and hollowheart resistance for a set of watermelon genotypes,and(ii)identify genotypes with high stability for lycopene,sugar,and hollowheart resistance.A diverse set of 40 genotypes was tested over 3 years and 8 locations across the southern United States in replicated,multi-harvest trials.Lycopene was tested in a subset of 10 genotypes.Data were analyzed using univariate and multivariate stability statistics(BLUP-GGE biplot)using SASGxE and RGxE programs.There were strong effects of environment as well as G×E interaction on watermelon quality traits.On the basis of stability measures,genotypes were classified as stable or unstable for each quality trait.'Crimson Sweet'is an inbred line with high quality trait performance as well as trait stability.'Stone Mountain','Tom Watson','Crimson Sweet'and'Minilee'were among the best genotypes for lycopene content,sugar content and hollowheart resistance.We developed a stability chart based on marketable yield and average ranking generated from different stability measures for yield attributes and quality traits.The chart will assist in choosing parents for improvement of watermelon cultivars.See http://gffzz783b6e01a04243c3hqcp6ovpx65q069vv.ffgz.tsg.suse.edu.cn/cucurbit/wmelon/wmelonmain.html.Mahendra Dia Todd C Wehner Penelope Perkins-Veazie Richard Hassell Daniel S Price George E Boyhan Stephen M Olson Stephen R King Angela R Davis Gregory E Tolla Jerome Bernier Benito Juarez 2016Horticulture Research2016,3,1:2
8Gene list 2001 for cucumber显示文摘WEHNER T C XIE J H 2001Cucurbit Genetics Cooperative Report2001,24,:1
9Screening the cucumber germplasm collection for resistance to gummy stem blight in North Carolina field tests显示文摘WEHNER T C SHETTY N V 2000HortScience2000,35,6:1
10Review of genes and linkage groups in cucumber显示文摘Lawrence K P Wehner T C 1990HortScience1990,25,6:1
11Interaction of flesh color genes in watermelon显示文摘HENDERSON W R SCOTF G H WEHNER T C 1998J Hered1998,89,:1
12The characterization of bacterial and nonbacterial prostatitis prostatic immunoglobulins显示文摘 Wehner N 1986Medicine1986,65,6:1
13Endovascular thrombolysis in deep cerebral venous thrombosis显示文摘 Jungries CA Wehner JJ 1997Am J Neuroradiol1997,18,:1
14How bees analyse the polarization patterns in the sky显示文摘Rossel S Wehner R 1984Journal of Compalafive Physiology A1984,154,5:1
15Contributions of anthropogenic and natural forcing to recent tropopause height changes显示文摘SANTER B D WEHNER M F WIGLEY T M L 2003Science2003,301,5632:1
16The genes of watermelon显示文摘GUNER N WEHNER T C 2004HortScience2004,39,:1
17Genetic variation for low-temperature germination ability in cucumber显示文摘Wehner T C 1982Cucurbit Genetics Cooperative Report1982,5,:1
18'Cascade'-and 'nonskid-chain-like'syntheses of molecular cavity topologies显示文摘 WEHNER W VOGTLE F 1978Synthesis1978,,2:1
19Heat shock protein synthesis and thermotolerance in Cataglyphis,an ant from the Sahara desert显示文摘Gehring W J Wehner R 1995Proc Natl Acad Sci USA1995,92,5:1
20Review of genes and linkage groups in cucumber 显示文摘Pierce L K Wehner T C 1990Horticulture1990,25,6:1
返回顶部 每页显示:
共33页 首页 上一页 第1页 下一页 末页 /33 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费