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1235篇 您的检索式:作者名="DENNIS R"
    题名 作者 年代 出处 被引量
1小花棘豆(Oxytropis glabra DC.)内生真菌的培养与鉴定显示文摘小花棘豆(Oxytropis glabra DC.)是内蒙古草原上的重要毒草,实验结合微生物学和分子生物学手段进行了其内生真菌研究。结果表明:体外培养的小花棘豆内生真菌生长缓慢,呈圆形、隆起、边缘整齐、辐射状生长的白色菌落,后菌体分泌黑褐色的色素物质,分生孢子近圆柱形,有粗且比孢子壁厚的暗色横隔膜,隔膜数1-5个。10个菌株的5.8S rDNA/ITS序列与内生真菌Embellisia sp.L12株的序列高度相似。推测该内生真菌属于Embellisia。卢萍 Dennis Child 赵萌莉 Dale R Gardener 吕桂芬 韩国栋 2009生态学报2009,29,1:29
2Effect of prophylactic clip placement following endoscopic mucosal resection of large colorectal lesions on delayed polypectomy bleeding: A meta-analysis显示文摘BACKGROUND The role of prophylactic clipping for the prevention of delayed polypectomy bleeding(DPB) remains unclear and conclusions from prior meta-analyses are limited due to the inclusion of variety of resection techniques and polyp sizes.AIM To conduct a meta-analysis on the effect of clipping on DPB following endoscopic mucosal resection(EMR) of colorectal lesions ≥ 20 mm.METHODS We performed a search of PubMed and the Cochrane library for studies comparing the effect of clipping vs no clipping on DPB following endoscopic resection. The Cochran Q test and I^2 were used to test for heterogeneity. Pooling was conducted using a random-effects model.RESULTS Thirteen studies with a total of 7794 polyps were identified, of which data was available on 1701 cases of EMR of lesions ≥ 20 mm. Prophylactic clipping was associated with a lower rate of DPB(1.4%) when compared to no clipping(5.2%)(pooled OR: 0.24, 95%CI: 0.12-0.50, P < 0.001) following EMR of lesions ≥ 20 mm.There was no significant heterogeneity among the studies(I^2 = 0%, P = 0.67).CONLUSION Prophylactic clipping may reduce DPB following EMR of large colorectal lesions.Future trials are needed to further identify risk factors and stratify high risk cases in order to implement a cost-effective preventive strategy.Fares Ayoub Donevan R Westerveld Justin J Forde Christopher E Forsmark Peter V Draganov Dennis Yang 2019World Journal of Gastroenterology2019,25,18:9
3利用抗高血压药相关的遗传变异发现其潜在的功效和副作用显示文摘通过研究药物靶蛋白基因的自然变异可以了解药物的功效。本研究旨在利用这种方法探索抗高血压药的潜在副作用和再利用潜力。研究者首先确定了血管紧张素转换酶抑制剂(angiotensin converting enzyme inhibitor,ACEI)、β受体阻滞剂和钙拮抗剂的合适代表基因。刘青(译) 叶鹏(校) Gill D Georgakis MK Koskeridis F Jiang L Feng Q Wei WQ Theodoratou E Elliott P Denny JC Malik R Evangelou E Dehghan A Dichgans M Tzoulaki I 2019中华高血压杂志2019,0,9:3
4Acoustic measurements of models of military style supersonic nozzle jets显示文摘Modern military aircraft jet engines are designed with variable-geometry nozzles to provide optimal thrust in different operating conditions,depending on the flight envelope. However,acoustic measurements for such nozzles are scarce,due to the cost involved in making fullscale measurements and the lack of details about the exact geometries of these nozzles. Thus the present effort at Pennsylvania State University(PSU) in partnership with GE Aviation and the NASA Glenn Research Center is aiming to study and characterize the acoustic field produced by supersonic jets issuing from converging-diverging military style nozzles,and to identify and test promising noise reduction techniques. An equally important objective is to develop methodology for using data obtained from small- and moderate-scale experiments to reliably predict the full-scale engine noise. The experimental results presented show reasonable agreement between small-scale and medium-scale jets,as well as between heated jets and heat-simulated ones.Ching-Wen Kuo Jérémy Veltin Dennis K.McLaughlin 2014Chinese Journal of Aeronautics2014,27,1:2
5CDX2 protein expression compared to alcian blue staining in the evaluation of esophageal intestinal metaplasia显示文摘AIM:To compare the sensitivity and specificity of CDX2 and alcian blue(AB) p H 2.5 staining in identifying esophageal intestinal metaplasia.METHODS:One hundred and ninty-nine biopsies from 186 patients were retrospectively reviewed and categorized as Barrett's esophagus(BE)(n =108); non-Barrett's esophagus(NBE)(n =48); columnar blue cells(CB) and esophageal glands(EG)(n =43).The biopsies were stained with AB and immunostained for CDX2 using a mouse monoclonal antibody from Biogenex(clone CDX2-88) and the Ventana Discovery X automated immunostainer.The positive and negative predictive value of each group was used to determine the predictive power of CDX2 and AB in diagnosing intestinal metaplasia.RESULTS:All of the 108 BE biopsies(100%) were positive for AB and 102 of them(94.4%) were positive for CDX2.The six BE patients(5.6%) who failed to stain with CDX2 were found to have lost the focus of intestinal metaplasia upon deeper sectioning for immunostaining.Both AB and CDX2 were negative in 43 out of 48(89.6%) NBE cases.Five NBE patients(10.4%) were falsely positive for AB due to the presence of EG and CB in these biopsies.These cases were all CDX2 negative.In addition,5 AB negative NBE were found to be CDX2 positive.Based on these results the CDX2 immunostain had similar sensitivity but higher specificity(100% vs about 91%) than AB in detecting intestinal type metaplasia in these samples.Our data shows that CDX2 has a better PPV in detecting intestinal metaplasia as compared to AB(95.6% vs 71.5%,respectively).CONCLUSION:CDX2 has a better positive predictive value than AB in detecting intestinal metaplasia.CDX2may be useful when challenged by gastro-esophageal biopsies containing mimikers of BE.Dennis R Johnson Maisoun Abdelbaqui Maryam Tahmasbi Zoltan Mayer Hung-Wei Lee Mokenge P Malafa Domenico Coppola 2015World Journal of Gastroenterology2015,21,9:2
6地中海膳食干预研究中来自胆碱通路的血浆代谢物与心血管病风险的关系显示文摘血浆甜菜碱水平以及胆碱代谢水平与主要心血管病终点之间的联系仍不清楚。研究者评估了胆碱通路的代谢物与偶发心血管病风险以及地中海膳食干预的潜在调节效应之间的相关性。黄洁 叶鹏 Guasch-Ferré M Hu FB Ruiz-Canela M Bulló M Toledo E Wang DD Corella D Gómez-Gracia E Fiol M Estruch R Lapetra J Fitó M Arós F Serra-Majem L Ros E Dennis C Liang L Clish CB Martínez-González MA Salas-Salvadó J 2017中华高血压杂志2017,25,12:2
7Precision atomic gravimeter based on Bragg diffraction显示文摘P A Altin M T Johnsson V Negnevitsky G R Dennis R P Anderson J E Debs S S Szigeti K S Hardman S Bennetts G D McDonald L D Turner J D Close N P Robins 2013New Journal of Physics2013,,2:2
8Depression and lipoprotein lipids in healthy, postmenopausal women The moderating effects of hormone replacement therapy 显示文摘BROWN R A GIGGEY P P DENNIS K E 2004J Psychosomatic Res2004,57,2:1
9Synthesis of alkyl and aryl phosplaazene high polymers显示文摘Harry R Allcock Dennis B Patterson Thomas L Evans 1977J Am Chem Soc1977,99,18:1
10Bacterial vaginesis and susceptibility to HIV infection in South African women:a nested case-control study显示文摘Myer L Denny L Telerant R 2005J Infect Dis2005,192,8:1
11Tracking and followup of 16, 915 Adolescents: Minimizing Attrition Bias 显示文摘Theodore C Dennis R Melbourne F 1997Controlled Clinical Trails1997,18,:1
12Gastrointestinal hemorrhage after acute stroke显示文摘Davenport R J Dennis MS Warlow CP 1996Stroke1996,27,3:1
13Band theory for the magnetic moment in the bcc Fe-Co alloy显示文摘Schwarz Karlheinz Salahub Dennis R 1982Phys Rev B1982,25,:1
14An objective technique for evaluating doubletalk detectors in acoustic echo canceller显示文摘Cho J H Dennis R M Senesty J 1990IEEE Trans on Speech and Audio Processing1990,4,6:1
15Rubber elongation by farnesyl pyrophosphate synthases involves a novel switch in enzymes tereospecificity 显示文摘LIGHT D R LAZARUS R A DENNIS M S 1989The Journal of Biological Chemistry1989,264,18:1
16The environmental fate of phthalate esters -flliterature review显示文摘Charles A S Dennis R P 1997Chemosphere1997,35,4:1
17Climate change and the effect of increasing spring temperatures on emergence dates of the butterfly Apatura iris (Lepidoptera: Nymphalidae)显示文摘Dell D Sparks T H Dennis R L H 2005European Journal of Entomology2005,102,2:1
18Kinematics of the patellofemoral joint in total knee arthroplasty显示文摘Stiehl J B Komistek R D Dennis D A 2001Journal of Arthroplasty2001,16,6:1
19Bacterial Vaginosis and Susceptibility to HIV Infection in South African Women:A Nested Case-Control Study显示文摘Myer L Denny L Telerant R 2005J Infect Dis2005,192,8:1
20Dynarrfic EMG analysis of torque transfer in professional baseball pitchers显示文摘WATKINS R G DENNIS S DILLIN W H 1989Spine1989,14,4:1
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