维普中文期刊产品整合服务
4699篇 您的检索式:作者名="KERN"
    题名 作者 年代 出处 被引量
1不同围压下岩石中泊松比的各向异性显示文摘由弹性波纵横波速比计算得到的泊松比 ,在利用地震波反演地下结构和物质组成时 ,可以提供比单纯地利用纵波或者横波波速更强的约束 .为了研究不同岩石中泊松比及其各向异性随围压的变化 ,选取 1 9块典型的岩石样品 ,在不同围压下沿相互正交的 3个方向同时测量纵、横波速度 ,并通过计算得到了泊松比及其各向异性 .结果表明 ,在大部分样品中泊松比各向异性与纵波速度各向异性有一定的相关性 ,但在有的样品中泊松比各向异性与纵波速度各向异性没有明显的关系 ,甚至表现出完全相反的变化规律 .由于泊松比也表现出很强的各向异性 ,在排除微裂隙的影响后有的仍可以达到 30 %以上 ,在利用实际地震波传播数据通过泊松比反演地下物质结构时必须考虑其各向异性的影响 .刘斌 席道瑛 葛宁洁 王宝善 H. Kern T. Popp 2002地球物理学报2002,45,6:55
2The emerging role and targetability of the TCA cycle in cancer metabolism显示文摘tricarboxylic 酸(TCA ) 周期是为在房间的氧化 phosphorylation 的一条中央线路,并且完成他们的 bioenergetic, biosynthetic,和氧化还原作用平衡要求。尽管有癌症房间绕过的早教义 TCA 骑车并且首先利用氧气的 glycolysis,新兴的证据表明那某些癌症房间,特别那些与 deregulated oncogene 和肿瘤 suppressor 表示,为精力重重地依靠 TCA 周期生产和大分子合成。作为地进步,在 tumorigenesis 和使用小分子禁止者使不安的潜力的异常 TCA 周期功能的重要性为癌症治疗的提高的周期功能开始演变。在这评论,我们关于在燃料上喂周期, oncogenes 的效果和肿瘤 suppressors 的燃料总结当前的知识,周期酶的周期用法,普通基因改变和解除管制,和为指向 TCA 的潜在的治疗学的机会在癌症房间骑车。用先进技术并且在 vivo 模型有机体研究的申请,是我们的希望这个以前俯看的生物化学的中心学习将提供新鲜卓见进癌症新陈代谢和 tumorigenesis,随后在各种各样的癌症为治疗学的干预揭示危险打字。Nicole M. Anderson Patrick Mucka Joseph G. Kern Hui Feng 2018Protein & Cell2018,9,2:17
3Proposal of an ultrasonographic classification for hepatic alveolar echinococcosis: Echinococcosis multilocularis Ulm classification-ultrasound显示文摘AIM: To establish an ultrasonographic classification based on a large sample of patients with confirmed hepatic alveolar echinococcosis(AE).METHODS: Clinical data and ultrasonography(US) findings of 185 patients(100 males; 85 females; mean age at diagnosis: 51.4 ± 17.6 years; mean age at time of US examination: 58.7 ± 18.2 years) were retrospectively reviewed with respect to the US morphology of hepatic AE lesions. The sonomorphological findings were grouped according to a five-part classification scheme.RESULTS: Application of the new classification resulted in the following distribution of sonomorphological patterns among the patients examined: hailstorm(54.1%); pseudocystic(13.5%); ossification(13.0%); hemangioma-like(8.1%); and metastasis-like(6.5%). Only 4.9% of lesions could not be assigned to a sonomorphological pattern.CONCLUSION: The sonomorphological classification proposed in the present study facilitates the diagnosis,interpretation and comparison of hepatic alveolar echinococcosis in routine practice and in the context of scientific studies.Wolfgang Kratzer Beate Gruener Tanja EM Kaltenbach Sarina Ansari-Bitzenberger Peter Kern Michael Fuchs Richard A Mason Thomas FE Barth Mark M Haenle Andreas Hillenbrand Suemeyra Oeztuerk Tilmann Graeter 2015World Journal of Gastroenterology2015,21,43:16
4The Role of Host-derived Dentinal Matrix Metalloproteinases in Reducing Dentin Bonding of Resin Adhesives显示文摘Dentin matrix metalloproteinases (MMPs) are a family of host-derived proteolytic enzymes trapped within mineralized dentin matrix, which have the ability to hydrolyze the organic matrix of demineralized dentin. After bonding with resins to dentin there are usually some exposed collagen fibrils at the bottom of the hybrid layer owing to imperfect resin impregnation of the demineralized dentin matrix. Exposed collagen fibrils might be affected by MMPs inducing hydrolytic degradation, which might result inreduced bond strength. Most MMPs are synthesized and released from odontoblasts in the form of proenzymes, requiring activation to degrade extracellular matrix components. Unfortunately, they can be activated by modern self-etch and etch-and-rinse adhesives. The aim of this review is to summarize the current knowledge of the role of dentinal host-derived MMPs in dentin matrix degradation. We also discuss various available MMP inhibitors, especially chlorhexidine, and suggest that they could provide a potential pathway for inhibiting collagen degradation in bonding interfaces thereby increasing dentin bonding durability.Matthias Kern 2009International Journal of Oral Science2009,1,4:13
5Structure and composition of the continental crust in East China显示文摘Crustal structures of nine broad tectonic units in China, except the Tarim craton, are derived from 18 seismic refraction profiles including 12 geoscience transects. Abundances of 63 major, trace and rare earth elements in the upper crust in East China are estimated. The estimates are based on sampling of 11 451 individual rock samples over an area of 950 000 km^2, from which 905 large composite samples are prepared and analyzed by 13 methods. The middle, lower and total crust compositions of East China are also estimated from studies of exposed crustal cross sections and granulite xenoliths and by correlation of seismic data with lithologies. All the tectonic units except the Tarim craton and the Qinling orogen show a four-layered crustal structure, consisting of the upper, middle, upper lower, and lowermost crusts. P-wave velocities of the bulk lower crust and total crust are 6.8—7.0 and 6.4—6.5 km/s, respectively. They are slower by 0.2—0.4 km/s than the global averages. The bulk lower crust is高山 骆庭川 张本仁 张宏飞 韩吟文 赵志丹 KERN Hartmut 1999Science China Earth Sciences1999,42,2:11
6说《诗》:《孔子诗论》之文理与义理显示文摘所谓《孔子诗论》(或简称《诗论》),是约公元前300年的一篇竹简文,现藏上海博物馆。这篇文本在论述《诗经》诗篇时,呈现出了丰富的修辞模式,包括反问、感叹句式,归诸孔子的直接引语,一连串独特的句法结构,不同寻常地突出使用第一人称代词,在进行阐述或做出结论之前分两步乃至三步提出简短命题的写法,等等。不过,《诗论》是否就诗歌提出了任何特殊观点,抑或是某些诗歌之外的东西?该文本是否意在讨论、说服?这些论断精简的深奥话语,是否只对那些抱持同样看法的读者才具有意义?该文本为何而作?《诗论》不是关于《诗经》的综论,也不能仅凭推测便将之系于古代中国的某位名人名下。相反,它是一篇特殊的学校文本,是一种教学手段,用来教导如何释诗、用诗。据此而言,文本的写作相当独特,因而也格外重要,它为我们理解周代楚国地区特殊语境中具体的释诗、教诗活动提供了洞见。而且,作为迄今所见的最早此类文本,它促使我们不仅就《毛诗传》提出质疑,而且更重要的是还对我们所持的、自宋代以来的现代读法本身提出了质疑。柯马丁(Martin Kern) 刘倩(译) 杨治宜(校) 2012文学遗产2012,,3:11
7Proposal of a computed tomography classification for hepatic alveolar echinococcosis显示文摘AIM: To establish a computed tomography(CT)-morphological classification for hepatic alveolar echinococcosis was the aim of the study. METHODS: The CT morphology of hepatic lesions in 228 patients with confirmed alveolar echinococcosis(AE) drawn from the Echinococcus Databank of the University Hospital of Ulm was reviewed retrospectively. For this reason, CT datasets of combined positron emission tomography(PET)-CT examinations were evaluated. The diagnosis of AE was made in patientswith unequivocal seropositivity; positive histological findings following diagnostic puncture or partial resection of the liver; and/or findings typical for AE at either ultrasonography, CT, magnetic resonance imaging or PET-CT. The CT-morphological findings were grouped into the new classification scheme.RESULTS: Within the classification a lesion was dedicated to one out of five 'primary morphologies' as well as to one out of six 'patterns of calcification'. 'primary morphology' and 'pattern of calcification' are primarily focussed on separately from each other and combined, whereas the 'primary morphology' V is not further characterized by a 'pattern of calcification'. Based on the five primary morphologies, further descriptive sub-criteria were appended to types Ⅰ-Ⅲ. An analysis of the calcification pattern in relation to the primary morphology revealed the exclusive association of the central calcification with type Ⅳ primary morphology. Similarly, certain calcification patterns exhibited a clear predominance for other primary morphologies, which underscores the delimitation of the individual primary morphological types from each other. These relationships in terms of calcification patterns extend into the primary morphological sub-criteria, demonstrating the clear subordination of those criteria.CONCLUSION: The proposed CT-morphological classification(EMUC-CT) is intended to facilitate the recognition and interpretation of lesions in hepatic alveolar echinococcosis. This could help to interpret different clinical courses better and shall assist in the context of scientific studies to improve the comparability of CT findings.Tilmann Graeter Wolfgang Kratzer Suemeyra Oeztuerk Mark Martin Haenle Richard Andrew Mason Andreas Hillenbrand Thomas Kull Thomas F Barth Peter Kern Beate Gruener 2016World Journal of Gastroenterology2016,22,13:10
8现象学在中国显示文摘Iso Kern 倪梁康 2000江海学刊2000,,5:10
9Comparison between cerebral state index and bispectral index as measures of electroencephalographic effects of sevoflurane using combined sigmoidal Emax model显示文摘目的: 服的州的索引(CSI ) 最近为测量麻醉的深度作为一个 electroencephalographic 监视器被介绍。我们作为 sevoflurane 的措施完成使用二联合 sigmoidal E 最大 模型。Dong Woo HAN Olinto-Jose LINARES-PERDOMO Jong Seok LEE Jun Ho KIM Steven E KERN 2011Acta Pharmacologica Sinica2011,32,10:9
10Radiation exposure and reduction in the operating room: Perspectives and future directions in spine surgery显示文摘Intraoperative imaging is vital for accurate placement of instrumentation in spine surgery. However, the use of biplanar fluoroscopy and other intraoperative imaging modalities is associated with the risk of significant radiation exposure in the patient, surgeon, and surgical staff. Radiation exposure in the form of ionizing radiation can lead to cellular damage via the induction of DNA lesions and the production of reactive oxygen species. These effects often result in cell death or genomic instability, leading to various radiation-associated pathologies including an increased risk of malignancy. In attempts to reduce radiation-associated health risks, radiation safety has become an important topic in the medical field. All practitioners, regardless of practice setting, can practice radiation safety techniques including shielding and distance to reduce radiation exposure. Additionally, optimization of fluoroscopic settings and techniques can be used as an effective method of radiation dose reduction. New imaging modalities and spinal navigation systems have also been developed in an effort to replace conventional fluoroscopy and reduce radiation doses. These modalities include Isocentric Three-Dimensional C-Arms, O-Arms, and intraoperative magnetic resonance imaging. While this influx of new technology has advanced radiation safety within the field of spine surgery, more work is still required to overcome specific limitations involving increased costs and inadequate training.Ankur S Narain Fady Y Hijji Kelly H Yom Krishna T Kudaravalli Brittany E Haws Kern Singh 2017World Journal of Orthopedics2017,8,7:9
11Expert consensus for the diagnosis and treatment of cystic and alveolar echinococcosis in humans显示文摘Enrico Brunetti Peter Kern Dominique Angèle Vuitton 2009Acta Tropica2009,,1:4
12早期中国手抄文献研究方法之反思显示文摘本文讨论了早期中国手抄文献研究中的若干方法论问题:抄本创作和传承过程中的书写及口头性现象;当抄本有对应传世文本时的阐释问题;不同文本间引文和平行文本的事实;以及作者身份的问题及其功能。当前西方漠学研究裹所关注的某些研究方法论,在如今的中国学术界却没有得到普遍的关注,这些只是其中的几个例证。本文追问的是这一情况的成因,为何缺乏真正的互动是与我们(境内外学者)都息息相关的问题,以及我们何以促进致力古代中国研究的不同学术共同体之间的全球交流。此外,本文也反思了北关及欧洲汉学界之间的差异,并介绍了目前正在编写中的一本漠学研究手册,题为:《早期中国手抄文献:文本、语境及方法》。柯马丁(Martin Kern) 杨治宜(译) 2011国学学刊2011,,4:4
13Poisson's ratio of eclogite: Implications for lower crustal delamination of orogens显示文摘Laboratory measurements of combined P- and S-wave-velocities of eclogite from the Dabie-Sulu ultrahigh pressure metamorphic belt and from literature data show a significant increase of Poisson抯 ratio of eclogite with its intrinsic water content H2O+ and thus the degree of hydration. Unaltered eclogites with H2O+<1.0% have an average Poisson抯 ratio between 0.24 and 0.25, which is identical to that calculated from single crystal elastic properties but lower than the averages (0.270.02) of measurements compiled by previous studies. Thus, the Poisson抯 ratio of unaltered eclogites is considerably lower than that of lower crustal mafic granulite and upper mantle peridotite. The lower crust and upper mantle of the Dabie ultrahigh pressure metamorphic belt, the northern and southern parts of the Tibetan Plateau as well as the central Andes, where eclogite may have formed during Mesozoic and Cenozoic tectonism, are characterized by the Poisson抯 ratio >0.26. This, together with their normal upper mantle P-wave velocities, implies that eclogites are no longer an important component of the present-day lower crust and upper mantle of these subduction-collision belts. Combined with age constraints on eclogite-facies metamor- phism and subsequent exhumation, this in turn suggests that the interval from formation to delamination of eclogites is confined to a very short period of <15 Ma.高山 Hartmut Kern 金振民 张宏飞 张本仁 2003Science China Earth Sciences2003,46,9:4
14Physiological Assessment of Coronary Artery Disease in the Cardiac Catheterization Laboratory: A Scientific Statement From the American Heart Association Committee on Diagnostic and Interventional Cardiac Catheterization, Council on Clinical Cardiology显示文摘Morton J. Kern Amir Lerman Jan-Willen Bech Bernard De Bruyne Eric Eeckhout William F. Fearon Stuart T. Higano Michael J. Lim Martijn Meuwissen Jan J. Piek Nico H.J. Pijls Maria Siebes Jos A.E. Spaan 2006Circulation2006,,12:3
15Niederaussem电站1000MW超临界汽轮机(英文)显示文摘 本文对Niederau?emK电站汽轮机的初始运行情况展开讨论,并对已使用的最新技术进行了详细的论述。Wilfried Ulm Dale Ernette John Kern Ralf M. Bell 2003热力透平2003,,1:3
16Testing the robustness of particle-based separation models for the magnetic separation of a complex skarn ore显示文摘Physical separation processes are best understood in terms of the behaviour of individual ore particles.Yet,while different empirical particle-based separation modelling approaches have been developed,their predictive performance has never been tested under variable process conditions.Here,we investigated the predictive performance of a state-of-the-art particle-based separation model under variable feed composition for a laboratory-scale magnetic separation of a skarn ore.Two scenarios were investigated:one in which the mass flow of the different processing streams could be measured and one in which it had to be estimated from data.In both scenarios,the predictive models were sufficiently general to predict the process outcomes of new samples of variable composition.Nevertheless,the scenario in which mass flow could be measured was4%more precise in predicting mass balances.The process behaviour of minerals present at concentrations above 0.1%by weight could be accurately predicted.Our findings indicate the potential use of this method to minimize the costs of metallurgical testwork while providing in-depth understanding of the recovery behaviour of individual ore particles.Moreover,the method may be used to establish powerful tools to forecast mineral recoveries for partly new ore types at a running mining operation.Lucas Pereira Max Frenzel Markus Buchmann Marius Kern Raimon Tolosana-Delgado K.Gerald van den Boogaart Jens Gutzmer 2022International Journal of Mining Science and Technology2022,32,3:3
17Retinol Binding Protein 4 Expression in Humans: Relationship to Insulin Resistance, Inflammation, and Response to Pioglitazone显示文摘Aiwei Yao-Borengasser Vijayalakshmi Varma Angela M. Bodles Neda Rasouli Bounleut Phanavanh Mi-Jeong Lee Tasha Starks Leslie M. Kern Horace J. Spencer Amir Adel Rashidi Robert E. McGehee Susan K. Fried Philip A. Kern 2007The Journal of Clinical Endocrinology & Metabolism2007,,7:3
18Current Concepts of Integrated Coronary Physiology in the Catheterization Laboratory显示文摘Morton J. Kern Habib Samady 2010Journal of the American College of Cardiology2010,,3:3
19不同粘固剂粘固的IPS-Empress2后牙全瓷冠边缘微渗漏比较研究显示文摘目的 :评价 3种不同粘固剂粘固的 IPS- Empress2后牙全瓷冠的边缘微渗漏。方法 :制作 2 4个 IPS-Empress2全瓷冠 ,分 3组用 3种不同粘固剂粘固于上颌第三磨牙 ,经温度循环试验后 ,将样本浸入 2 %品红溶液2 4 h,用体视显微镜观测牙 -粘固剂界面、全瓷冠 -粘固剂界面边缘微渗漏状况。结果 :Panavia F树脂粘结系统组微渗漏最小 (0 .90± 0 .75 ,0 .4 6± 0 .37) ,Dyract compomer树脂粘结剂组次之 (4.71± 1.6 8,5 .2 8± 1.4 8) ,而 Harvard磷酸锌粘固剂组最大 (6 .99± 0 .0 4 ,6 .99± 0 .0 4 ) ,经 F检验 P<0 .0 1。结论 :Panavia F树脂粘结系统抗边缘微渗漏性能优越 ,适于粘固 IPS- Empress2后牙全瓷冠。顾新华 Matthias Kern 2002浙江大学学报(医学版)2002,31,3:3
20Early Results of the Swiss Multicentre Bypass or Sleeve Study (SM-BOSS): A Prospective Randomized Trial Comparing Laparoscopic Sleeve Gastrectomy and Roux-en-Y Gastric Bypass显示文摘Ralph Peterli Yves Borbély Beatrice Kern Markus Gass Thomas Peters Martin Thurnheer Bernd Schultes Kurt Laederach Marco Bueter Marc Schiesser 2013Annals of Surgery2013,,5:3
返回顶部 每页显示:
共235页 首页 上一页 第1页 下一页 末页 /235 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