维普中文期刊产品整合服务
948篇 您的检索式:作者名="Warren D"
    题名 作者 年代 出处 被引量
1中-新元古界标准剖面蓟县系首获高精度年龄制约——蓟县剖面雾迷山组和铁岭组斑脱岩锆石SHRIMP U-Pb同位素定年研究显示文摘近期在蓟县中-新元古界标准剖面铁岭组和雾迷山组首次发现斑脱岩、并测得其锆石SHRIMP U-Pb同位素年龄为~1440Ma(1439±14Ma)和~1485Ma(1483±13Ma和1487±16Ma),这标志着这条传统的标准剖面上以碳酸盐岩为主体的蓟县系上部的两个重要组,从此也获得了直接的、高精度的锆石U-Pb同位素年龄约束。这是华北中-新元古界标准剖面蓟县系相关地层单位首次获得直接而精确的锆石U-Pb同位素年龄约束,也是在整个华北北缘燕山地区雾迷山组内部首次获得精确的直接定年。这一进展为闻名中外的天津蓟县剖面中-新元古界年代地层格架的正确厘定、以及今后继续作为华北该阶段的标准剖面,并与国内外其他地区相关地层的正确对比等,提供了新的、精确的年代学"锚点",因而具有重要的科学和实际意义。李怀坤 苏文博 周红英 相振群 田辉 杨立公 Warren D HUFF Frank R ETTENSOHN 2014岩石学报2014,30,10:68
2Ovarian autoimmune disease: clinical concepts and anima models显示文摘卵巢不是一个 immunologically 给予优惠的机关,但是在为卵巢特定的抗原的 tolerogenic 机制的一个故障在生育力上有灾难性的后果在里面女人,和这在自体免疫的疾病的鼠科的模型被复制。孤立的卵巢的自体免疫的疾病在女人是稀罕的,由于疾病和无能到的严厉可能播送越过代授与卵巢的疾病的基因信息。尽管如此,自体免疫的卵巢炎经常与另外的自体免疫的疾病联合被观察,特别地自体免疫的肾的疾病,并且在社会和单个健康上拿使用费。在老鼠的研究揭示了保护卵巢免受自体免疫的攻击的伤害的至少二机制。这些机制为自体免疫的管理者(亚耳河) 由导出胸腺的规章的 T 房间,以及一个角色包括 autoreactive T 房间的控制,在髓的 thymic 导致限制织物的抗原的表示的一个 transcriptional 管理者上皮的房间在 T 房间的开发期间。尽管后者机制不完全地被定义,也的失败导致自体免疫调停指向和卵巢的滤泡的弄空,这很好被建立。在这评论,我们将探讨自体免疫调停的临床的特征和后果在女人的卵巢的不孕,以及由动物揭示了的疾病的可能的机制当模特儿。Bryce D Warren William K Kinsey Lynda K McGinnis Lane K Christenson Susmita Jasti Anne M Stevens Brian K Petroff Margaret G Petroff 2014Cellular & Molecular Immunology2014,11,6:3
3A prospective trial of volumetric intensity-modulated arc therapy vs conventional intensity modulated radiation therapy in advanced head and neck cancer显示文摘AIM: To prospectively compare volumetric intensitymodulated arc therapy(VMAT) and conventional intensity-modulated radiation therapy(IMRT) in coverage of planning target volumes and avoidance of multiple organs at risk(OARs) in patients undergoing definitive chemoradiotherapy for advanced(stage Ⅲ or Ⅳ)squamous cell cancer of the head and neck. METHODS: Computed tomography scans of 20 patients with advanced tumors of the larynx, naso-, oroand hypopharynx were prospectively planned using IMRT(7 field) and VMAT using two arcs. Calculated doses to planning target volume(PTV) and OAR were compared between IMRT and VMAT plans. Dose-volume histograms(DVH) were utilized to obtain calculated doses to PTV and OAR, including parotids, cochlea,spinal cord, brainstem, anterior tongue, pituitary and brachial plexus. DVH's for all structures were compared between IMRT and VMAT plans. In addition the planswere compared for dose conformity and homogeneity. The final treatment plan was chosen by the treating radiation oncologist. RESULTS: VMAT was chosen as the ultimate plan in 18 of 20 patients(90%) because the plans were thought to be otherwise clinically equivalent. The IMRT plan was chosen in 2 of 20 patients because the VMAT plan produced concentric irradiation of the cord which was not overcome even with an avoidance structure. For all patients, VMAT plans had a lower number of average monitor units on average(MU = 542.85) than IMRT plans(MU = 1612.58)(P < 0.001). Using the conformity index(CI), defined as the 95% isodose volume divided by the PTV, the IMRT plan was more conformal with a lower conformity index(CI = 1.61) than the VMAT plan(CI = 2.00)(P = 0.003). Dose homogeneity, as measured by average standard deviation of dose distribution over the PTV, was not different with VMAT(1.45 Gy) or IMRT(1.73 Gy)(P = 0.069). There were no differences in sparing organs at risk.CONCLUSION: In this prospective study, VMAT plans were chosen over IMRT 90% of the time. Compared to IMRT, VMAT plans used only one third of the MUs, had shorter treatment times, and similar sparing of OAR. Overall, VMAT provided similar dose homogeneity but less conformity in PTV irradiation compared to IMRT. This difference in conformity was not clinically significant.Simon D Fung-Kee-Fung Rachel Hackett Lee Hales Graham Warren Anurag K Singh 2012World Journal of Clinical Oncology2012,3,4:2
4什那干群层凝灰岩夹层SHRIMP锆石U-Pb年代学研究及其意义显示文摘在内蒙古乌拉特前旗大佘太镇附近的什那干群“下岩组”中下部,第一次发现了层凝灰岩等火山沉积夹层,并对其中的层凝灰岩(NM-1191)开展了SHRIMP锆石U-Pb年代学研究,精确标定其喷发时间为1614±8 Ma。由此可以确认,什那干群整体上应属于国际古元古代固结纪(Statherian Period,1800~1600 Ma)末期-中元古代盖层纪(Calymmian Period,1600~1400 Ma)初期(相当于中国中元古代长城纪(1800~1600 Ma)末期-蓟县纪(1600~1400 Ma)初期)沉积。这一新的年代地层学归属的确定,显示什那干群与毗邻的渣尔泰山群及白云鄂博群(化德群)的相应层位,应属于“三群并立”、“同时异相”的沉积古地理格局;同时这也表明,该群基本可与华北克拉通北缘-中部的大红峪组-高于庄组对比,并与南缘洛峪口组-龙家园组大体相当。结合相关资料可进一步推知,位于鄂尔多斯西缘贺兰山-千里山一带的黄旗口组-王全口组及阿拉善南缘龙首山地区墩子沟群中下部(即第一、第二岩组),也应与什那干群的层位基本一致。这一广泛存在的对比关系很可能也说明,至少到中元古代盖层纪早期,阿拉善(阴山)地块仍隶属于华北克拉通的范畴,并与鄂尔多斯西缘、燕辽盆地-华北中部带及熊耳裂谷区等,共同拥有一个统一的“泛华北”陆表海。什那干群新的年代学约束及相关地层单元年代学等时框架的建立,为重新认知该阶段华北克拉通北缘沉积-构造古地理及其演化,探讨华北克拉通与哥伦比亚超大陆关系等重要命题,提供了关键的年代地层学约束。苏文博 李文国 李惠民 宋彪 狄永军 周红英 王惠 王健 Frank R Ettensohn Warren D Huff 2022华北地质2022,45,2:2
5Qiamtofuomg augmentation gluteoplasty outcomes:a comparison of three instruments used to measure gluteal projection显示文摘 FERREIRA D M WARREN S M 2007Aesthetic Plast Surg2007,21,:1
6Surface disturbance of cryptobiotic soil crusts: Nitrogenase activity,chlorophyll content,and chlorophyll degradation显示文摘Belnap J Harper K T Warren S D 1994Arid Soil Research and Rehabilitation1994,8,:1
7The program dependence graph and its use in optimization显示文摘Ferrante J Ottenstein K J Warren J D 1987ACM Transactions on Programming Languages and Systems1987,9,3:1
8Extmsion cooking and feed ingredients:the effects of processing on extrudedfeed and feed ingredients,particuliarly for animal performance显示文摘Warren G D 2003Worid Grain2003,,:1
9Surface passivation of bare aluminum nanoparticles using perfluoroalkyl carboxylic acids 显示文摘JOUET R J WARREN A D ROSENBERG D M BELITTO V J PARK K ZACHARIAH M R 2005Chem Mater2005,17,11:1
10Constructive and destructive deviance in organi- zations显示文摘Warren D E 2003Academy of Management Review2003,28,4:1
11Transistor selection and design of a VHF DC-DC power converter显示文摘Warren J R Rosowski A Perreault D J 2008IEEE Transactions on Power Electronics2008,27,1:1
12Relaxations in double base propellants 显示文摘Townend D J Warren R C 1985Polymer1985,26,:1
13Wiggler field measurements and corrections using the pulsed wire technique显示文摘Preston D W Warren R W 1992Nucl Instr and Meth In Phys Res1992,318,:1
14Structures of GRP94-nucleotide complexes reveal mechanistic differences between the hsp90 chaperones显示文摘Dollins D E Warren J J Immormino R M 2007Mol Cell2007,28,1:1
15Splicing by overlap extension by PCR using asymmetric amplification: an im- proved technique for the generation of hybrid proteins of immunological interest 显示文摘WARRENS A N JONES M D LECHLER R I 1997Gene1997,186,1:1
16Old age and the hepatic sinusoid 显示文摘Le Couteur D G Warren A Cogger V C 2008Anat Rec ( Hoboken)2008,291,6:1
17Inducible nitric oxidesynthase is increased in murine lung epithelial cells by cytokine stimula-tion显示文摘Robbins R A Springall D R Warren J B 1994Biochem Biophys Res Comniun1994,198,3:1
18Surface disturbance of cryptobiotic soil crusts: nitrogenase activity, chlorophyll content and chlorophyll degradation 显示文摘Belnap J Harper K T Warren S D 1994Arid Soil Research and Rehabilitation1994,8,:1
19The application of neutron activation analysis to the measurement of the wear of a friction material 显示文摘Bush H D Rowson D M Warren S E 1972Wear1972,20,2:1
20Modeling the impact of summer temperatures on national electricity consumption显示文摘Le Comte D M Warren H E 1981J Appl Meteor1981,20,12:1
返回顶部 每页显示:
共48页 首页 上一页 第1页 下一页 末页 /48 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