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465篇 您的检索式:作者名="R.M."
    题名 作者 年代 出处 被引量
1三维CT肾盂成像指导经皮肾造口取石术:结石测量、结石显示及肾盂肾盏系统重建的准确性显示文摘对经皮肾造口取石术(PCNL)前的CT肾盂成像检查进行回顾性研究。对20例肾结石病人应用精心设计的方案进行CT肾盂成像。评分并比较横断位、冠状位最大密度投影(MIP)和容积再现(VR)影像上结石的大小、对比剂排泄的一致性及结石和肾盂肾盏系统重建的准确性。注射对比剂后,横断位像可准确显示结石大小,而在冠状位像上常被低估。增强前后测量结果分别平均为14.7mm:14.4mm(横断位)、17.2mm:16.1mm(冠状位)(P=0.11和0.03)。U. Patel R.M. Walkden K.R. Ghani K. Anson 闫喆(译) 李威(校) 2009国际医学放射学杂志2009,32,4:42
2铁矿石的阳离子浮选:胺的性质和行为显示文摘本文研究了不同厂家生产的醚胺、脂肪胺和缩合胺的红外光谱差别。在 3种胺及其衍生物的红外吸收光谱中观察到它们明显的区别。醚胺在 1114cm- 1 处有一个很易于识别的特征峰。这个峰是由C O基团引起的 ,根据这个峰可将醚胺与其它类型胺化合物区别开。若没有这个峰存在 ,就表明那个化合物不是醚胺。根据 32 0 0cm- 1 附近陡的峰来区别脂肪胺和缩合胺。这个峰可能是因为缩合分子的N H基团与C =O基团亲合引起的。根据铁英岩矿石分批试验结果 ,评价了这些胺的浮选性质。试验表明 ,醚胺是最有效的浮选石英的捕收剂。对于所研究的矿石 。R.M.帕皮里 王皓 2001国外金属矿选矿2001,38,8:17
3射血分数正常心力衰竭的患病率和临床结局的变化趋势显示文摘Background: The prevalence of heart failure with preserved ejection fraction may be changing as a result of changes in population demographics and in the prevalence and treatment of risk factors for heart failure. Changes in the prevalence of heart failure with preserved ejection fraction may contribute to changes in the natural history of heart failure. We performed a study to define secular trends in the prevalence of heart failure with preserved ejection fraction among patients at a single institution over a 15-year period. Methods: We studied all consecutive patients hospitalized with decompensated heart failure at Mayo Clinic Hospitals in Olmsted County, Minnesota, from 1987 through 2001. We classified patients as having either preserved or reduced ejection fraction. The patients were also classified as community patients(Olmsted County residents) or referral patients. Secular trends in the type of heart failure, associated cardiovascular disease, and survival were defined. Results: A total of 6076 patients with heart failure were discharged over the 15-year period; data on ejection fraction were available for 4596 of these patients(76 percent). Of these, 53 percent had a reduced ejection fraction and 47 percent had a preserved ejection fraction. The proportion of patients with the diagnosis of heart failure with preserved ejection fraction increased over time and was significantly higher among community patients than among referral patients(55 percent vs. 45 percent). The prevalence rates of hypertension, atrial fibrillation, and diabetes among patients with heart failure increased significantly over time. Survival was slightly better among patients with preserved ejection fraction(adjusted hazard ratio for death, 0.96; P=0.01). Survival improved over time for those with reduced ejection fraction but not for those with preserved ejection fraction. Conclusions: The prevalence of heart failure with preserved ejection fraction increased over a 15-year period, while the rate of death from this disorder remained unchanged. These trends underscore the importance of this growing public health problem.Owan T.E. Hodge D.O. Herges R.M. M.M. Redfield 马超 2006世界核心医学期刊文摘(心脏病学分册)2006,,12:11
4多普勒组织成像技术评价左心室扭转重构:标记磁共振成像验证研究Notomi Y. Setser R.M. Shiota T. J.D. Thomas 苏畅 2005世界核心医学期刊文摘(心脏病学分册)2005,0,9:10
5象征人类学显示文摘在人类学中,“象征的”或“解释的”风气正日益占据优势,并变得越来越时髦。象征人类学使文化的研究明显地成为一种解释的探索(interpretive quest)。用格尔茨的话来说,人类是“被吊在意义的网(webs of significance)中”。人类学是对积累和收集起来的其他民族的象征符号的探究与发掘,就事物的内涵、隐藏的联系和深层的特点而论,是比民族志的表面迹象的描述更深入的研究。如果把文化比作教科书。R.M.基辛 刘文远 王威 1988世界民族1988,,6:6
6Binary gas adsorption/desorption isotherms: effect of moisture and coal composition upon carbon dioxide selectivity over methane显示文摘C.R. Clarkson R.M. Bustin 2000International Journal of Coal Geology2000,,4:4
7Fluorescence as a potential monitoring tool for recycled water systems: A review显示文摘R.K. Henderson A. Baker K.R. Murphy A. Hambly R.M. Stuetz S.J. Khan 2008Water Research2008,,4:3
8Biological activities of sulfated polysaccharides from tropical seaweeds显示文摘L.S. Costa G.P. Fidelis S.L. Cordeiro R.M. Oliveira D.A. Sabry R.B.G. Camara L.T.D.B. Nobre M.S.S.P. Costa J. Almeida-Lima E.H.C. Farias E.L. Leite H.A.O. Rocha 2009Biomedicine & Pharmacotherapy2009,,1:3
9Effects of conservation tillage on corn and soybean yield in the humid continental climate region of Northeast China显示文摘Y. Chen S. Liu H. Li X.F. Li C.Y. Song R.M. Cruse X.Y. Zhang 2011Soil & Tillage Research2011,,:3
10Effects of essential oils on Aedes aegypti larvae: Alternatives to environmentally safe insecticides显示文摘W.J. Silva G.A.A. Dória R.T. Maia R.S. Nunes G.A. Carvalho A.F. Blank P.B. Alves R.M. Mar?al S.C.H. Cavalcanti 2007Bioresource Technology2007,,8:2
11Volumetric parameterization and trivariate B-spline fitting using harmonic functions显示文摘T. Martin E. Cohen R.M. Kirby 2008Computer Aided Geometric Design2008,,6:2
12Electrophoreted Zn–TiO 2 –ZnO nanocomposite coating films for photocatalytic degradation of 2-chlorophenol显示文摘A. Abdel Aal M.A. Barakat R.M. Mohamed 2008Applied Surface Science2008,,15:2
13Effects of Delayed Second Cochlear Implant显示文摘Objective Since Helms' successful bilateral cochlear implantation with good results in 1996, there have been increasing number of reports on bilateral cochlear implantation. Most second device have been implantated within one year after the first. Considering effects of long time auditory deprivation, it is not clear whether a delayed second cochlear implant serves to add additional benefits and how it may interact with central nervous system plasticity. Methods Three cases who received delayed second cochlear implants at People's Hospital of Peking University from 2002 to 2005 were reviewed. The interval between the first and second implants was longer than 2 years in all three patients. Sound perception, and unilateral/bilateral speech discrimination in quiet and noise were evaluated. In addition, GAP detection test was conducted in one patient. Results In one case, having both implants on provided improved performance compared to using only one implant both in quiet and noise. Presumably due to visual interference from lip-reading or short interval between second implant and testing, one patient showed no improvement from using the second implant either in quiet or noise, while the last case demonstrated additional benefits from the second implant only in quiet. In all three patients, performance in recognizing the four tones in Mandarin was superior over word recognition. Conclusions Considerable plasticity in the cerebral auditory center is preserved, despite long acoustic deprivation in some children who have received unilateral cochlear implant. Delayed second implants can result in significant improvements in some of these children. Visual interference from lip-reading may be an obstacle during retraining. The better recognition of tones in the Mandarin language may represent a different sound discrimination mechanism in the auditory system, although it may also be related to the signal processing mechanisms of the implant used (MED-EL COMBI 40+).XIA Rui-ming1, WU Xi-hong2, JANG Zi-gang1, JING Yuan-yuan1, LIN Yun-juan1, YU Li-sheng1 1. Department of Otolaryngology, People’s Hospital, Peking University, P. R. China 11, Xizhimen South St, 100044 Beijing, P.R. China 2. Speech and Hearing Research Center, Peking University, China R.M. Xia, X.H. Wu, Z.G. Jang, Y.Y. Jing, Y.J. Lin, L.S.Yu 2006Journal of Otology2006,1,2:2
14Chitosan—A versatile semi-synthetic polymer in biomedical applications显示文摘M. Dash F. Chiellini R.M. Ottenbrite E. Chiellini 2011Progress in Polymer Science2011,,8:2
15在眼眶减压术当时及以后行上睑退缩矫正术对治疗甲状腺性眼眶病的疗效比较Ben Simon G.J. Mansury A.M. Schwarcz R.M. 王永强 2005世界核心医学期刊文摘(眼科学分册)2005,0,10:2
16主观整体评价、传统营养评分和机体组成分析:对3种肝硬化营养评价方法的比较Figueiredo F.A.F. Perez R.M. Freitas M.M. Kondo M. 廖新华 2006世界核心医学期刊文摘(胃肠病学分册)2006,0,11:2
17Modelling the growth boundaries of Staphylococcus aureus : Effect of temperature, pH and water activity显示文摘A. Valero F. Pérez-Rodríguez E. Carrasco J.M. Fuentes-Alventosa R.M. García-Gimeno G. Zurera 2009International Journal of Food Microbiology2009,,1:2
18OLGA staging for gastritis: A tutorial显示文摘M. Rugge P. Correa F. Di Mario E. El-Omar R. Fiocca K. Geboes R.M. Genta D.Y. Graham T. Hattori P. Malfertheiner S. Nakajima P. Sipponen J. Sung W. Weinstein M. Vieth 2008Digestive and Liver Disease2008,,8:2
19产生量子点的一种新方法(英文)显示文摘我们提出并试验了一种制备量子点阵的新方法。利用二步法制备的阳极氧化铝上规则排列纳米洞为模板,以紫外脉冲激光(2 48nm)溅射方法将氧化物经过带纳米洞的模板溅射到单晶Si的衬底上。以荧光材料La0 .95Eu0 .0 5BaB9O16 为靶材,初步获得了Si衬底上荧光材料的点阵。ZHANG P.X. WANG C.Z. ZHOU X.F. YANG R.M. YU L. WANG L.Y. FANG Y. 2005光散射学报2005,17,1:2
20Fertility results using bovine semen cryopreserved with extenders based on egg yolk and soy bean extract显示文摘A.M. van Wagtendonk-de Leeuw R.M. Haring L.M.T.E. Kaal-Lansbergen J.H.G. den Daas 2000Theriogenology2000,,1:2
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