|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Design of 16S rRNA gene primers for 454 pyrosequencing of the human foregut microbiome显示文摘AIM:To design and validate broad-range 16S rRNA primers for use in high throughput sequencing to classify bacteria isolated from the human foregut microbiome.METHODS:A foregut microbiome dataset was constructed using 16S rRNA gene sequences obtained from oral,esophageal,and gastric microbiomes produced by Sanger sequencing in previous studies represented by 219 bacterial species.Candidate primers evaluated were from the European rRNA database.To assess the effect of sequence length on accuracy of classification,16S rRNA genes of various lengths were created by trimming the full length sequences.Sequences spanning various hypervariable regions were selected to simulate the amplicons that would be obtained using possible primer pairs.The sequences were compared with full length 16S rRNA genes for accuracy in taxonomic classification using online software at the Ribosomal Database Project (RDP).The universality of the primer set was evaluated using the RDP 16S rRNA database which is comprised of 433 306 16S rRNA genes,represented by 36 phyla.RESULTS:Truncation to 100 nucleotides(nt)downstream from the position corresponding to base 28 in the Escherichia coli 16S rRNA gene caused misclassification of 87(39.7%)of the 219 sequences,compared with misclassification of only 29(13.2%)sequences with truncation to 350 nt.Among 350-nt sequence reads within various regions of the 16S rRNA gene,the reverse read of an amplicon generated using the 343F/798R primers had the least(8.2%)effect on classification.In comparison,truncation to 900 nt mimicking single pass Sanger reads misclassified 5.0%of the 219 sequences.The 343F/798R amplicon accurately assigned 91.8%of the 219 sequences at the species level.Weighted by abundance of the species in the esophageal dataset,the 343F/798R amplicon yielded similar classification accuracy without a significant loss in species coverage(92%).Modification of the 343F/798R primers to 347F/803R increased their universality among foregut species.Assuming that a typicalpolymerase chain reaction can tolerate 2 mismatches between a primer and a template,the modified 347F and 803R primers should be able to anneal 98%and 99.6%of all 16S rRNA genes in the RDP database.CONCLUSION:347F/803R is the most suitable pair of primers for classification of foregut 16S rRNA genes but also possess universality suitable for analyses of other complex microbiomes. | Carlos W Nossa William E Oberdorf Jφrn A Aas Bruce J Paster Todd Z DeSantis Eoin L Brodie Daniel Malamud Michael A Poles Zhiheng Pei | 2010 | World Journal of Gastroenterology2010，16，33： | 16 |
| 2 | Executive Summary: Heart Disease and Stroke Statistics— 2010 Update: A Report From the American Heart Association显示文摘 | Donald Lloyd-Jones Robert J. Adams Todd M. Brown Mercedes Carnethon Shifan Dai Giovanni De Simone T. Bruce Ferguson Earl Ford Karen Furie Cathleen Gillespie Alan Go Kurt Greenlund Nancy Haase Susan Hailpern P. Michael Ho Virginia Howard Brett Kissela Stev | 2010 | Circulation2010，，7： | 5 |
| 3 | Quality indicators for colonoscopy显示文摘 | Douglas K. Rex John L. Petrini Todd H. Baron Amitabh Chak Jonathan Cohen Stephen E. Deal Brenda Hoffman Brian C. Jacobson Klaus Mergener Bret T. Petersen Michael A. Safdi Douglas O. Faigel Irving M. Pike | 2006 | Gastrointestinal Endoscopy2006，，4： | 4 |
| 4 | Chromosome-scale scaffolding of the black raspberry (Rubus occidentalis L.) genome based on chromatin interaction data显示文摘Black raspberry(Rubus occidentalis L.)is a niche fruit crop valued for its flavor and potential health benefits.The improvement of fruit and cane characteristics via molecular breeding technologies has been hindered by the lack of a high-quality reference genome.The recently released draft genome for black raspberry(ORUS 4115-3)lacks assembly of scaffolds to chromosome scale.We used high-throughput chromatin conformation capture(Hi-C)and Proximity-Guided Assembly(PGA)to cluster and order 9650 out of 11,936 contigs of this draft genome assembly into seven pseudo-chromosomes.The seven pseudo-chromosomes cover~97.2%of the total contig length(~223.8 Mb).Locating existing genetic markers on the physical map resolved multiple discrepancies in marker order on the genetic map.Centromeric regions were inferred from recombination frequencies of genetic markers,alignment of 303 bp centromeric sequence with the PGA,and heat map showing the physical contact matrix over the entire genome.We demonstrate a high degree of synteny between each of the seven chromosomes of black raspberry and a high-quality reference genome for strawberry(Fragaria vesca L.)assembled using only PacBio long-read sequences.We conclude that PGA is a cost-effective and rapid method of generating chromosome-scale assemblies from Illumina short-read sequencing data. | Rubina Jibran Helge Dzierzon Nahla Bassil Jill M.Bushakra Patrick P.Edger Shawn Sullivan Chad E.Finn Michael Dossett Kelly J.Vining Robert VanBuren Todd C.Mockler Ivan Liachko Kevin M.Davies Toshi M.Foster David Chagné | 2018 | Horticulture Research2018，5，1： | 4 |
| 5 | 建立初级卒中中心的修订和更新意见来自脑卒中联盟的总结声明显示文摘背景和目的自从2000年脑卒中联盟发布首份关于建立初级卒中中心的推荐意见以来,初级卒中中心的组建和认证工作已出现迅速发展。本文的目的在于修订和更新我们关于初级卒中中心的推荐意见以反映最新资料和经验。方法我们使用MEDLINE和PubMed数据库回顾了相关文献(2000年3月至2011年1月),主要针对急性卒中的诊断、治疗和护理。如果发现有效且相关,同样对原始文献、汇总分析和其他治疗指南进行回顾并纳入分析。标明证据等级以反映当前指南发展的实际情况。结果基于文献回顾以及针对初级卒中中心的经验,一些要素的重要性已得到进一步的加强,同时增加了几个新的领域。这些内容包括:(1)急诊卒中团队的重要性;(2)配备遥测监控的卒中单元的重要性;(3)MRj和弥散加权序列进行脑成像的实施;(4)用磁共振血管成像或CT血管成像对脑血管系统进行评价;(5)心脏影像学检查;(6)康复治疗的早期启动;(7)由独立机构进行的认证,包括实地考察和疾病评价指标。结论基于上述证据,初级卒中中心的某些要素对于改善急性卒中患者的诊治特别重要。其他要素则集中于脑、脑血管系统和心脏的影像学检查。这些新的要素也许能改善在初级卒中中心接受诊治的卒中患者的治疗和转归。 | Mark J. Alberts Richard E. Latchaw Andy Jagoda Lawrence R Wechsler Todd Crocco Mary G. George E.S. Connolly Barbara Mancini Stephen Prudhomme Daryl Gress Mary E. Jensen Robert Bass Robert Ruff Kathy Foell Rocco A. Armonda Marian Emr Margo Warren Jim Baranski Michael D. Walker 黄志超(译) 张霞(译) 尤寿江(译) 曹勇军(译) 刘春风(译) | 2012 | 国际脑血管病杂志2012，20，7： | 3 |
| 6 | High school sports programs differentially impact participation by sex显示文摘背景:研究表明,参加体育活动可降低儿童和青少年肥胖的风险。学校是促进儿童和青少年参加体育活动的理想环境,但目前尚不清楚体育活动的'获得'和'选择'如何影响学生的参与度,也不清楚学校体育课的特点对学生参与体育的影响是否存在性别差异。本研究旨在评价高中体育运动项目的特点,并确定这些体育课程对男女生参与运动队的影响程度。方法:用电话采访的方式纵向调查了1,244名新罕布什尔州和佛蒙特州的学生。学生自述他们小学至高中阶段参与运动队的情况。通过调查高中职员了解体育机会。在本研究中,'体育机会'是指每100名学生所对应的学校提供的体育项目种类《选择)和学校提供的体育种类中不限制参加人数的体育项目的比例(获得)。结果:约70%的儿童参加了至少一个体育运动队,男生为73%,女生为66%。研究发现在性别和两个体育机会变量之间存在显著交互影响。控制小学生参与体育活动和其他协变量后,发现如果学校不限制最受欢迎的体育项目的参与人数,男生会参加更多的体育运动队(RR=1.12,p<0.01)。相反,如果学校提供广泛的体育项目,女生会参加更多的体育运动队(RR=1 47,p<0.001)。结论:前人研究表明,参加体育活动能带来许多健康效益。对公共卫生工作包括预防肥胖而言,学校体育课可能是一个重要而有效但未被充分利用的对象。要使青少年参加更多的体育活动,就应综合考虑学校体育项目的获得和选择。学校可运用不同策略,促使男生和女生更多地参加体育活动。 | Keith M. Drake Meghan R. Longacre Todd MacKenzie Linda J. Titus Michael L. Beach Andrew G. Rundle Madeline A. Dalton | 2015 | Journal of Sport and Health Science2015，4，3： | 3 |
| 7 | Thoracoscopic segmentectomy compares favorably with thoracoscopic lobectomy for patients with small stage I lung cancer显示文摘 | Mark Shapiro Todd S. Weiser Juan P. Wisnivesky Cynthia Chin Michael Arustamyan Scott J. Swanson | 2009 | The Journal of Thoracic and Cardiovascular Surgery2009，，6： | 3 |
| 8 | Clinical and Pathologic Correlation of 84 Mucinous Cystic Neoplasms of the Pancreas: Can One Reliably Differentiate Benign From Malignant (or Premalignant) Neoplasms?显示文摘 | Michael G. Sarr Herschel A. Carpenter Lawrence P. Prabhakar Todd F. Orchard Steven Hughes Jon A. van Heerden Eugene P. DiMagno | 2000 | Annals of Surgery2000，，2： | 3 |
| 9 | Impacts of climate change on hydrology,water quality and crop productivity in the Ohio-Tennessee River Basin显示文摘Nonpoint source pollution from agriculture is the main source of nitrogen and phosphorus in the stream systems of the Corn Belt region in the Midwestern US.The eastern part of this region is comprised of the Ohio-Tennessee River Basin(OTRB),which is considered a key contributing area for water pollution and the Northern Gulf of Mexico hypoxic zone.A point of crucial importance in this basin is therefore how intensive corn-based cropping systems for food and fuel production can be sustainable and coexist with a healthy water environment,not only under existing climate but also under climate change conditions in the future.To address this issue,a OTRB integrated modeling system has been built with a greatly refined 12-digit subbasin structure based on the Soil and Water Assessment Tool(SWAT)water quality model,which is capable of estimating landscape and in-stream water and pollutant yields in response to a wide array of alternative cropping and/or management strategies and climatic conditions.The effects of three agricultural management scenarios on crop production and pollutant loads exported from the crop land of the OTRB to streams and rivers were evaluated:(1)expansion of continuous corn across the entire basin,(2)adoption of no-till on all corn and soybean fields in the region,(3)implementation of a winter cover crop within the baseline rotations.The effects of each management scenario were evaluated both for current climate and projected mid-century(2046-2065)climates from seven global circulation models(GCMs).In both present and future climates each management scenario resulted in reduced erosion and nutrient loadings to surface water bodies compared to the baseline agricultural management,with cover crops causing the highest water pollution reduction.Corn and soybean yields in the region were negligibly influenced from the agricultural management scenarios.On the other hand,both water quality and crop yield numbers under climate change deviated considerably for all seven GCMs compared to the baseline climate.Future climates from all GCMs led to decreased corn and soybean yields by up to 20%on a mean annual basis,while water quality alterations were either positive or negative depending on the GCM.The study highlights the loss of productivity in the eastern Corn Belt under climate change,the need to consider a range of GCMs when assessing impacts of climate change,and the value of SWAT as a tool to analyze the effects of climate change on parameters of interest at the basin scale. | Yiannis Panagopoulos Philip W.Gassman Raymond W.Arritt Daryl E.Herzmann Todd D.Campbell Adriana Valcu Manoj K.Jha Catherine L.Kling Raghavan Srinivasan Michael White Jeffrey G.Arnold | 2015 | International Journal of Agricultural and Biological Engineering2015，8，3： | 2 |
| 10 | Preoperative Nutritional Status Is an Important Predictor of Survival in Patients Undergoing Surgery for Renal Cell Carcinoma显示文摘 | Todd M. Morgan Dominic Tang Kelly L. Stratton Daniel A. Barocas Christopher B. Anderson Justin R. Gregg Sam S. Chang Michael S. Cookson S. Duke Herrell Joseph A. Smith Peter E. Clark | 2011 | European Urology2011，，6： | 2 |
| 11 | Targeting α-7 Nicotinic Acetylcholine Receptor in the Enteric Nervous System显示文摘 | Todd W. Costantini Michael Krzyzaniak Gerald A. Cheadle James G. Putnam Ann-Marie Hageny Nicole Lopez Brian P. Eliceiri Vishal Bansal Raul Coimbra | 2012 | The American Journal of Pathology2012，，2： | 2 |
| 12 | Quality indicators for colonoscopy显示文摘 | Douglas K. Rex John L. Petrini Todd H. Baron Amitabh Chak Jonathan Cohen Stephen E. Deal Brenda Hoffman Brian C. Jacobson Klaus Mergener Bret T. Petersen Michael A. Safdi Douglas O. Faigel Irving M. Pike | 2006 | Gastrointestinal Endoscopy2006，，4： | 2 |
| 13 | Is There a Role for Endoscopic Therapy as a Definitive Treatment for Post-Laparoscopic Bile Duct Injuries?显示文摘 | Javairiah Fatima Joshua G. Barton Travis E. Grotz Zhimin Geng William S. Harmsen Marianne Huebner Todd H. Baron Michael L. Kendrick John H. Donohue Florencia G. Que David M. Nagorney Michael B. Farnell | 2010 | Journal of the American College of Surgeons2010，，4： | 2 |
| 14 | Stratified-charge combustion: modeling and imaging of a spray-guided direct-injection spark-ignition engine显示文摘 | Michael C. Drake Todd D. Fansler Andreas M. Lippert | 2004 | Symposium (International) on Combustion2004，，2： | 2 |
| 15 | Integrated Genomic Analysis Identifies Clinically Relevant Subtypes of Glioblastoma Characterized by Abnormalities in PDGFRA , IDH1 , EGFR , and NF1显示文摘 | Roel G.W. Verhaak Katherine A. Hoadley Elizabeth Purdom Victoria Wang Yuan Qi Matthew D. Wilkerson C. Ryan Miller Li Ding Todd Golub Jill P. Mesirov Gabriele Alexe Michael Lawrence Michael O'Kelly Pablo Tamayo Barbara A. Weir Stacey Gabriel Wendy Winckler | 2010 | Cancer Cell2010，，1： | 2 |
| 16 | EUS-guided biliary drainage for patients with malignant biliary obstruction with an indwelling duodenal stent (with videos)显示文摘 | Mouen A. Khashab Larissa L. Fujii Todd H. Baron Marcia Irene Canto Christopher J. Gostout Bret T. Petersen Patrick I. Okolo Mark D. Topazian Michael J. Levy | 2012 | Gastrointestinal Endoscopy2012，，1： | 2 |
| 17 | Disconnected pancreatic duct syndrome in severe acute pancreatitis: clinical and imaging characteristics and outcomes in a cohort of 31 cases显示文摘 | Mario Pelaez-Luna Santhi Swaroop Vege Bret T. Petersen Suresh T. Chari Jonathan E. Clain Michael J. Levy Randal K. Pearson Mark D. Topazian Michael B. Farnell Michael L. Kendrick Todd H. Baron | 2008 | Gastrointestinal Endoscopy2008，，1： | 2 |
| 18 | Peroral Endoscopic Drainage/Debridement of Walled-off Pancreatic Necrosis显示文摘 | Georgios I. Papachristou Naoki Takahashi Prabhleen Chahal Michael G. Sarr Todd H. Baron | 2007 | Annals of Surgery2007，，6： | 2 |
| 19 | Formation and Function of Acute Stroke–Ready Hospitals Within a Stroke System of Care Recommendations From the Brain Attack Coalition显示文摘 | Mark J. Alberts Lawrence R. Wechsler Mary E. Lee Jensen Richard E. Latchaw Todd J. Crocco Mary G. George James Baranski Robert R. Bass Robert L. Ruff Judy Huang Barbara Mancini Tammy Gregory Daryl Gress Marian Emr Margo Warren Michael D. Walker | 2013 | Stroke2013，，12： | 2 |
| 20 | High-speed imaging for direct-injection gasoline engine research and development显示文摘 | Volker Sick Michael C. Drake Todd D. Fansler | 2010 | Experiments in Fluids2010，，4： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员