维普中文期刊产品整合服务
908篇 您的检索式:作者名="BER"
    题名 作者 年代 出处 被引量
1稳定型冠心病患者其N-末端前B型脑钠肽与远期死亡率的关系Kragelund C. Grφnning B. Kφber L. 赵和平 2005世界核心医学期刊文摘(心脏病学分册)2005,0,7:37
2Crown and leaf traits as predictors of subtropical tree sapling growth rates显示文摘Aims Growth rates of plants are driven by factors that influence the amount of resources captured and the efficiency of resource use.In trees,the amount of light captured and the efficiency of light use strongly depends on crown characteristics and leaf traits.Although theory predicts that both crown and leaf traits affect tree growth,few studies have yet to integrate these two types of traits to explain species-specific growth rates.Using 37 broad-leaved tree species of subtropical forests in SE China,we investigated how interspecific differences in wood volume growth rates were affected by crown and leaf traits.We tested the hypotheses that(i)larger crown dimensions promote growth rates,(ii)species-specific growth rates are positively related to leaf stomatal conductance,leaf water potential and leaf chemical components,and negatively related to leaf C/N and leaf toughness and(iii)the two sets of traits better explain growth rates in combination than either alone.Methods Our study was conducted in a large-scale forest Biodiversity and Ecosystem Functioning experiment in China(BEF-China),located in a mountainous region in Jiangxi Province.We related 17 functional traits(two crown dimension and three crown structure traits;six physiological and six morphological leaf traits)to the mean annual growth rate of wood volume of young trees of the studied species.Interrelationships between crown and leaf traits were analyzed using principal component analysis.Simple linear regression analysis was used to test the effect of each trait separately.We used multiple regression analysis to establish the relationship of growth rate to each set of traits(crown traits,physiological and morphological leaf traits)and to the combination of all types of traits.The coefficients of determination(R^(2)_(adj))of the best multiple regression models were compared to determine the relative explanatory power of crown and leaf traits and a combination of both.Important Findings The species-specific growth rates were not related to any of the single crown traits,but were related positively to leaf stomatal conductance and leaf water potential individually,and negatively to leaf toughness,with approximately 13%variance explained by each of the traits.Combinations of different crown traits did not significantly explain the species-specific growth rates,whereas combinations of either physiological or morphological leaf traits explained 24%and 31%,respectively.A combination of both crown and leaf traits explained 42%of variance in species-specific growth rates.We concluded that sets of traits related to carbon assimilation at the leaf-level and to overall amount of leaves exposed at the crown-level jointly explained species-specific growth rates better than either set of traits alone.Ying Li Wenzel Kröber Helge Bruelheide Werner Härdtle Goddert von Oheimb 2017Journal of Plant Ecology2017,10,1:18
3Correlation of IL-8 with induction, progression and metastatic potential of colorectal cancer显示文摘AIM: To investigate the expression profile of IL-8 in inflammatory and malignant colorectal diseases to evaluate its potential role in the regulation of colorectal cancer (CRC) and the development of colorectal liver metastases (CRLM). METHODS: IL-8 expression was assessed by quantitative real-time PCR (Q-RT-PCR) and the enzyme-linked immunosorbent assay (ELISA) in resected specimens from patients with ulcerative colitis (UC, n = 6) colorectal adenomas (CRA, n = 8), different stages of colorectal cancer (n = 48) as well as synchronous and metachronous CRLM along with their corresponding primary colorectal tumors (n = 16). RESULTS: IL-8 mRNA and protein expression was significantly up-regulated in all pathological colorectal entities investigated compared with the corresponding neighboring tissues. However, in the CRC specimens IL-8 revealed a significantly more pronounced overexpression in relation to the CRA and UC tissues with an average 30-fold IL-8 protein up-regulation in the CRC specimens in comparison to the CRA tissues. Moreover, IL-8 expression revealed a close correlation with tumor grading. Most interestingly, IL-8 up-regulation was most enhanced in synchronous and metachronous CRLM, if compared with the corresponding primary CRC tissues. Herein, an up to 80-fold IL-8 overexpression in individual metachronous metastases compared to normal tumor neighbor tissues was found. CONCLUSION: Our results strongly suggest an association between IL-8 expression, induction and progression of colorectal carcinoma and the development of colorectal liver metastases.Claudia Rubie Vilma Oliveira Frick Sandra Pfeil Mathias Wagner Otto Kollmar Berit Kopp Stefan Grber Bettina M Rau Martin K Schilling 2007World Journal of Gastroenterology2007,13,37:12
4ICE3列车直线涡流制动装置显示文摘目前 ,德国铁路公司的第三代高速列车 ICE3已采用直线涡流制动装置。因为物理作用原理的缘故 ,该制动装置的使用要求从技术角度出发 ,对线路基础结构的一些特性 ,特别是信号技术方面的敏感元件和轨道 (几何 )位置的热稳定性 ,要进行重新审查。文章阐述了涡流制动装置 ( WB)在制动技术和运行方面的一些优点 ,讲述了从 2 0 0 2年 8月起 ,在科隆—莱茵 /美因这一新的高速行车区段的使用情况。叙述的重点是运转方案和对 ICE3调控区段基础设施事先所进行的强化检查。最后 ,介绍了自2 0 0 1年以来 ,在汉堡—慕尼黑区段上涡流制动装置 ( WB)在运转试验方面的一些经验。Johannes GRA■BER 张彦儒 2003国外机车车辆工艺2003,,5:10
5媒介进化是什么——新媒介历史的理论化阐释显示文摘此文对新媒介的出现提出了一种解释。媒介不只是技术发明的后果,它衍生于发明和'社会制度化'这样一个两阶段过程。技术发明只是改进了旧媒介。在创新阶段,新媒介开始被制度化。社会制度化的过程从根本上改变了媒介。本文探讨出版业、电报、电影、电台、电视和多媒体之间竞争性的媒介历史。同时审视了新媒介的出现与社会、政治、文化、经济和技术基础的关系。Rudolf Stber 尹良润 2007国际新闻界2007,29,10:7
6结直肠手术后感染的预防与治疗显示文摘大肠手术后并发感染的原因有病人机体状况欠佳,大肠本身的内在因素,对大肠手术适应症选择不当。节食、灌洗、应用抗生素是预防术后感染的传统三大步骤,本文作了详细阐述。并介绍术后感染的处理。徐以浩 J.Wortmann H.G.W■ber 1989腹部外科1989,2,3:6
7CT对诊断妇科肿瘤的价值显示文摘CT对诊断妇科肿瘤的意义说法不一。有必要严格制定使用CT检查的标准,使检查得到最大的效益。G.Rber B.Ptzschke 苏萍 1991放射学实践1991,6,2:5
8Improvement in corrosion resistance of magnesium coating with cerium treatment显示文摘Corrosion protection afforded by a magnesium coating treated in cerium salt solution on steel substrate was investigated using open circuit potential, polarization curves, and electrochemical impedance spectroscopy (EIS) in 0.005 M sodium chloride solution (NaCl). The morphology of the surface was characterized by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and X-ray diffraction (XRD). The cerium treated coating was obtained by immersion in CeCl3 solution. The results showed that the corrosion resistance of the treated magnesium coating was improved. The corrosion potential of the treated coating was found to be nobler than that of the untreated magnesium coating and the corrosion current decreased significantly. Impedance results showed that the cerium treatment increased corrosion protection. The improvement of anti-corrosion properties was attributed to the formation of cerium oxides and hydroxides that gave rise to a physical barrier effect.Samia Ben Hassen Latifa Bousselmi Patrice Berot El Mustafa Rezrazi Ezzeddine Triki 2009Rare Metals2009,28,3:5
9验证单源CT和双源CT利用调制传递函数评估时间分辨力的研究显示文摘本研究的目的是在单源CT和双源CT上验证一种利用三维心动自控装置测量时间分辨率的方法,它不依赖于生产商,有质量保证。D.Ertel E.Krber Y.Kyriakou O.Langner W.A.Kalender 张朝晖 2008国际医学放射学杂志2008,31,A06:4
10Giant hepatic extra-gastrointestinal stromal tumor treated with cytoreductive surgery and adjuvant systemic therapy:A case report and review of literature显示文摘BACKGROUND Primary extra-gastrointestinal stromal tumors(E-GIST)of the liver are rare.The clinical presentation may range from asymptomatic to bleeding or manifestations of mass effect.Oncologic surgery followed by adjuvant therapy with imatinib is the standard of care.However,under specific circumstances,a cytoreductive approach may represent a therapeutic option.We describe herein the case of an 84-year-old woman who presented with a tender,protruding epigastric mass.Abdominal computed tomography scan revealed a large,heterogeneous mass located across segments III,IV,V,and VIII of the liver.The initial approach was transarterial embolization of the tumor,which elicited no appreciable response.Considering the large size and central location of the tumor and the advanced age of the patient,non-anatomic complete resection was indicated.Due to substantial intraoperative bleeding and hemodynamic instability,only a near-complete resection could be achieved.Histopathology and immunohistochemical staining confirmed the diagnosis of primary E-GIST of the liver.Considering the risk/benefit ratio for therapeutic options,debulking surgery may represent a strategy to control pain and prolong survival.CASE SUMMARY Here,we present a case report of a patient diagnosed with E-GIST primary of the liver,which was indicated a cytoreductive surgery and adjuvant therapy with imatinib.CONCLUSION E-GIST primary of the liver is a rare conditional,the treatment is with systemic therapy and total resection surgery.However,a cytoreductive surgery will be necessary when a complete resection is no possible.Michel Ribeiro Fernandes Caroline Lorenzoni Almeida Ghezzi Tomaz J M Grezzana-Filho Flávia Heinz Feier Ian Leipnitz Aljamir Duarte Chedid Carlos Thadeu Schmidt Cerski Marcio Fernandes Chedid Cléber RositoPinto Kruel 2021World Journal of Gastrointestinal Surgery2021,13,3:3
11Search for a dark photon in the π 0 → e + e ? γ decay显示文摘P. Adlarson W. Augustyniak W. Bardan M. Bashkanov F.S. Bergmann M. Ber?owski H. Bhatt A. Bondar M. Büscher H. Calén I. Ciepa? H. Clement D. Coderre E. Czerwiński K. Demmich E. Doroshkevich R. Engels W. Erven W. Eyrich P. Fedorets K. F?hl K. Fransson F. Go 2013Physics Letters B . 2013 (1-3)2013,,1:3
12Postoperative pain after transvaginal cholecystectomy: single-center, double-blind, randomized controlled trial显示文摘Dietmar H. Borchert Matthias Federlein Frauke Fritze-Büttner Jens Burghardt Britta Liersch-L?hn Yüksel Atas Verena Müller Oskar Rückbeil Stefan Wagenpfeil Stefan Gr?ber Klaus Gellert 2014Surgical Endoscopy2014,,6:2
13Xanthogranulomatous cholecystitis resembling carcinoma with extensive tumorous infiltration of the liver and colon显示文摘Jürgen Pinocy Antje Lange Claudius K?nig Edwin Kaiserling Horst D. Becker Stefan M. Kr?ber 2003Langenbeck’s Archives of Surgery2003,,1:2
14Cardiac myocytes Ca2+and Na+regulation in normal and failing hearts显示文摘Bers DM Despa S 2006J Pharmacol Sci2006,100,5:1
15Ca2+ handling and sarco plasmic reticulum Ca2+ content in isolated failing and nonfailing human myocardium显示文摘PIESKE B MAIER L S BERS D M 1999Circ Res1999,85,:1
16Seismic traveltime tomography:a simulated annealing approach显示文摘Wéber Z 2000Physics of the Earth and Planetary Interiors2000,19,2:1
17Trandolapril reduces the incidence of atrial fibrillation after acute myocardial infarction in patients with left ventricular dysfunction显示文摘Pedersen OD Bagger H Kber L 1999Circulation1999,100,:1
18Controlled growth of Monodisperse silica spheres in the micron size range 显示文摘Werner St ber Arthur Fink 1968Journal of colloid and interface science1968,26,:1
19Trandolapfil reduces the incidence of atrial fibrillation after acute myocardial infarction in patients with left ventricular dysfunction显示文摘Pedersen OD Bagger H K? ber L 1999Circulation1999,100,:1
20Rat middle cerebral artery occlusion:evaluation of the model and development of neurologic examination显示文摘Ber derson JB Pitts LH Tsuji M 1986Stroke1986,17,:1
返回顶部 每页显示:
共46页 首页 上一页 第1页 下一页 末页 /46 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