维普中文期刊产品整合服务
11篇 您的检索式:作者名="Christopher Norton"
    题名 作者 年代 出处 被引量
1中国北方全新世人群头面部形态特征的微观演化显示文摘通过对中国北方地区新石器时代(161例)、青铜铁器时代(423例)和现代(134例)成年男性头骨的21项测量项目的对比、分析和显著性检验,对中国全新世人群颅骨形态特征的微观演化(microevolution)问题进行了研究.结果显示近万年来中国全新世人群的体质特征仍在进化.从新石器时代经过青铜铁器时代到现代,脑颅和面颅趋向缩小、鼻型趋向狭化、眶型趋向高窄化、颅型趋向圆隆化.在不同的演化时期里,颅骨各个性状的表现特点和变化幅度亦不同.脑颅缩小主要发生在从青铜铁器时代到现代.面颅缩小、狭鼻化及高眶化现象持续地发生在整个全新世时期,有可能还在继续演化.世界各地人群体质特征相似的演化趋势表明,全新世人群头骨形态特征的微观演化是受人类进化机制制约的.头骨缩小的原因与气候、环境及人们生活方式的改变有一定的关系.吴秀杰 刘武 张全超 朱泓 Christopher Norton 2007科学通报2007,52,2:17
2颅内模——人类脑演化研究的直接证据及研究状况显示文摘脑演化是人类演化的重要组成部分.尽管通过不同的方式都可以获取人类脑演化的信息,但颅内模作为古人类大脑形态的固化保存形式,储存着古人类脑的解剖、生理和进化等方面的信息,提供分析和探索人类脑进化的直接证据.文中概述了颅内模的主要特征及人类脑演化关注的几个问题,包括绝对脑量和相对脑量的进化,脑的形态特征及各脑叶的解剖结构的变化,脑不对称性与一侧优势,脑膜中动脉系统和静脉窦系统,计算机CT虚拟成像技术和三维重建对脑演化研究的促进.针对我国脑演化研究的状况,对未来工作加以展望.吴秀杰 刘武 Christopher Norton 2007自然科学进展2007,17,6:13
3Craniofacial morphological microevolution of Holocene populations in northern China显示文摘In order to better understand microevolutionary processes in Holocene Chinese craniofacial mor- phology, an analysis has been done on 21 metric traits on Neolithic (n=161), Bronze Age (n=423) and modern (n=134) adult male skulls from northern China. The results indicate that the physical characters of these Chinese populations evolved throughout the Holocene. From the Neolithic to Bronze Age to present day, general trends include: cranial and facial sizes decrease; the nose gets narrower and longer; the orbits become narrower and higher; the head is more globular. The expression of the cranial features varies between the different time periods. The decrease in cranial size primarily occurred from the Bronze Age to present day. However, the decrease in facial size, the narrowing of the nose, and the elevation of the orbits took place throughout the Holocene. These traits are likely still evolving. This evolving pattern of the cranial features for the Holocene Chinese populations is similar to that found elsewhere in the world. The decrease in overall craniofacial size is associated with changes in climate and diet. In addition, it is possible that the craniofacial morphological microevolution is controlled by human evolutionary mechanisms.WU XiuJie LIU Wu ZHANG QuanChao ZHU Hong Christopher J. NORTON 2007Chinese Science Bulletin2007,52,12:11
4Vanishing bile duct syndrome in human immunodeficiency virus infected adults:A report of two cases显示文摘Vanishing bile duct syndrome(VBDS) is a group of rare disorders characterized by ductopenia,the progressive destruction and disappearance of intrahepatic bile ducts leading to cholestasis.Described in association with medications,autoimmune disorders,cancer,transplantation,and infections,the specific mechanisms of disease are not known.To date,only 4 cases of VBDS have been reported in human immunodeficiency virus(HIV) infected patients.We report 2 additional cases of HIV-associated VBDS and review the features common to the HIV-associated cases.Presentation includes hyperbilirubinemia,normal liver imaging,and negative viral and autoimmune hepatitis studies.In HIV-infected subjects,VBDS occurred at a range of CD4+ T-cell counts,in some cases following initiation or change in antiretroviral therapy.Lymphoma was associated with two cases;nevirapine,antibiotics,and viral co-infection were suggested as etiologies in the other cases.In HIV-positive patients with progressive cholestasis,early identification of VBDS and referral for transplantation may improve outcomes.Ana Paula Oppenheimer Christopher Koh Mary McLaughlin John C Williamson Thomas D Norton Jennifer Laudadio Theo Heller David E Kleiner Kevin P High Caryn G Morse 2013World Journal of Gastroenterology2013,19,1:8
5Endocasts-the direct evidence and recent advances in the study of human brain evolution显示文摘Brain evolution is one of the most important aspects of human evolution,usually studied through endocasts.Analysis of fossil hominid endocasts allows inferences on functional anatomy,physiology,and phylogeny.In this paper,we describe the general features of endocast studies and review some of the major topics in paleoneurology.These are:absolute and relative brain size evolution;brain shape variation;brain asymmetry and lateralization;middle meningeal vessels and venous sinuses;application of computed tomography and virtual imaging;the history of Chinese brain endocast studies.In particular,this review emphasizes endocast studies on Chinese hominin fossils.Wu Xiujie Liu Wu Christopher J. Norton 2007Progress in Natural Science:Materials International2007,17,9:4
6Delayed diagnosis of alpha-1-antitrypsin deficiency following post-hepatectomy liver failure: A case report显示文摘Post-hepatectomy liver failure(PHLF) is a leading cause of morbidity and mortality following major liver resection. The development of PHLF is dependent on the volume of the remaining liver tissue and hepatocyte function. Without effective pre-operative assessment, patients with undiagnosed liver disease could be at increased risk of PHLF. We report a case of a 60-year-old male patient with PHLF secondary to undiagnosed alpha-1-antitrypsin deficiency(AATD) following major liver resection. He initially presented with acute large bowel obstruction secondary to a colorectal adenocarcinoma, which had metastasized to the liver. There was no significant past medical history apart from mild chronic obstructive pulmonary disease. After colonic surgery and liver directed neo-adjuvant chemotherapy, he underwent a laparoscopic partially extended right hepatectomy and radio-frequency ablation. Post-operatively he developed PHLF. The cause of PHLF remained unknown, prompting reanalysis of the histology, which showed evidence of AATD. He subsequently developed progressive liver dysfunction, portal hypertension, and eventually an extensive parastomal bleed, which led to his death; this was ultimately due to a combination of AATD and chemotherapy. This case highlights that formal testing for AATD in all patients with a known history of chronic obstructive pulmonary disease, heavy smoking, or strong family history could help prevent the development of PHLF in patients undergoing major liver resection.Benjamin Norton Jemimah Denson Christopher Briggs Matthew Bowles David Stell Somaiah Aroori 2016World Journal of Gastroenterology2016,22,11:3
7Numerical analysis of concrete-filled circle steel tubes显示文摘Yaohua Deng Terri R Norton Christopher Y Tuan 2012Structures and Buildings2012,1,1:1
8Hormone therapy and Alzheimer disease dementia: New findings from the Cache County Study显示文摘Huibo Shao John C.S. Breitner Rachel A. Whitmer Junmin Wang Kathleen Hayden Heidi Wengreen Chris Corcoran JoAnn Tschanz Maria Norton Ron Munger Kathleen Welsh-Bohmer Peter P. Zandi James Anthony Erin Bigler Ron Brookmeyer James Burke Eric Christopher Jane 2012Neurology2012,,18:1
9Hormone therapy and Alzheimer disease dementia: New findings from the Cache County Study显示文摘Huibo Shao John C.S. Breitner Rachel A. Whitmer Junmin Wang Kathleen Hayden Heidi Wengreen Chris Corcoran JoAnn Tschanz Maria Norton Ron Munger Kathleen Welsh-Bohmer Peter P. Zandi James Anthony Erin Bigler Ron Brookmeyer James Burke Eric Christopher Jane 2012Neurology2012,,18:1
10The prevalence of extracardiac findings by multidetector computed tomography before atrial fibrillation ablation显示文摘Brian J. Schietinger Ugur Bozlar Klaus D. Hagspiel Patrick T. Norton Heather R. Greenbaum Hongkun Wang David C. Isbell Rajan A.G. Patel John D. Ferguson Spencer B. Gay Christopher M. Kramer J. Michael Mangrum 2008American Heart Journal2008,,:1
11Postpolypectomy lower GI bleeding: Descriptive analysis显示文摘Darius Sorbi Ian Norton Massimo Conio Rita Balm Alan Zinsmeister Christopher J. Gostout 2000Gastrointestinal Endoscopy2000,,6:1
返回顶部 每页显示:
共1页 首页 上一页 第1页 下一页 末页 /1 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