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3552篇 您的检索式:作者名="Buchanan"
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1National trends in resection of the distal pancreas显示文摘AIM:To investigate national trends in distal pancreatectomy(DP) through query of three national patient care databases.METHODS:From the Nationwide Inpatient Sample(NIS,2003-2009),the National Surgical Quality Improvement Project(NSQIP,2005-2010),and the Surveillance Epidemiology and End Results(SEER,2003-2009) databases using appropriate diagnostic and procedural codes we identified all patients with a diagnosis of a benign or malignant lesion of the body and/or tail of the pancreas that had undergone a partial or distal pancreatectomy.Utilization of laparoscopy was defined in NIS by the International Classification of Diseases,Ninth Revision correspondent procedure code;and in NSQIP by the exploratory laparoscopy or unlisted procedure current procedural terminology codes.In SEER,patients were identified by the International Classification of Diseases for Oncology,Third Edition diagnosis codes and the SEER Program Code Manual,third edition procedure codes.We analyzed the databases with respect to trends of inpatient outcome metrics,oncologic outcomes,and hospital volumes in patients with lesions of the neck and body of the pancreas that underwent operative resection.RESULTS:NIS,NSQIP and SEER identified 4242,2681 and 11 082 DP resections,respectively.Overall,laparoscopy was utilized in 15%(NIS) and 27%(NSQIP).No significant increase was seen over the course of the study.Resection was performed for malignancy in 59%(NIS) and 66%(NSQIP).Neither patient Body mass index nor comorbidities were associated with operative approach(P = 0.95 and P = 0.96,respectively).Mortality(3% vs 2%,P = 0.05) and reoperation(4% vs 4%,P = 1.0) was not different between laparoscopy and open groups.Overall complications(10% vs 15%,P < 0.001),hospital costs [44 741 dollars,interquartile range(IQR) 28 347-74 114 dollars vs 49 792 dollars,IQR 13 299-73 463,P = 0.02] and hospital length of stay(7 d,IQR 4-11 d vs 7 d,IQR 6-10,P < 0.001) were less when laparoscopy was utilized.One and two year survival after resection for malignancy were unchanged over the course of the study(ductal adenocarinoma 1-year 63.6% and 2-year 35.1%,P = 0.53;intraductal papillary mucinous neoplasm and nueroendocrine 1-year 90% and 2-year 84%,P = 0.25).The majority of resections were performed in teaching hospitals(77% NIS and 85% NSQIP),but minimally invasive surgery(MIS) was not more likely to be used in teaching hospitals(15% vs 14%,P = 0.26).Hospitals in the top decile for volume were more likely to be teaching hospitals than lower volume deciles(88% vs 43%,P < 0.001),but were no more likely to utilize MIS at resection.Complication rate in teaching and the top decile hospitals was not significantly decreased when compared to non-teaching(15% vs 14%,P = 0.72) and lower volume hospitals(14% vs 15%,P = 0.99).No difference was seen in the median number of lymph nodes and lymph node ratio in N1 disease when compared by year(P = 0.17 and P = 0.96,respectively).CONCLUSION:There appears to be an overall underutilization of laparoscopy for DP.Centralization does not appear to be occurring.Survival and lymph node harvest have not changed.Armando Rosales-Velderrain Steven P Bowers Ross F Goldberg Tatyan M Clarke Mauricia A Buchanan John A Stauffer Horacio J Asbun 2012World Journal of Gastroenterology2012,18,32:8
2流域水文模型中的土壤质地转换与饱和导水率Ks值确定显示文摘构建于GIS基础之上的分布式水文模型,近年来得到了普遍的应用和较快的发展。土壤质地数据是模型构建的重要参数,但实际运用中,常存在土壤数据多种统计口径并存、与模型运算所需的数据类型不一致等问题,限制了模型的应用和模拟的精度。根据土壤典型剖面值,利用3次样条函数曲线插值得出了模型所需土壤粒径分布。根据粒径组成,使用NeroTheta软件计算出饱和导水率Ks值。为构建分布式水文模型数据库,确定主要土壤参数提供了简便有效的方法。陆颖 Sam BUCHANAN 何大明 2008云南地理环境研究2008,20,5:5
3The Level of Expression of Thioredoxin is Linked to Fundamental Properties and Applications of Wheat Seeds显示文摘有谷物(大麦和小麦) 和荚(Medicago truncatula ) 的工作作为种子的中央规章的蛋白质建立了 thioredoxin h (Trx h ) 。Trx h 由减少二硫化物(SS ) 扮演一些多样的种子蛋白质(存储蛋白质,酶,和酶禁止者) ,从而便于萌芽。早,在 vitro,蛋白质研究与有在内乳的 Trx h overexpressed 的大麦种子在显示出加速的萌芽和联系的酶(淀粉酶和 pullulanase ) 的早或提高的表示的实验被补充。当前的学习扩大转基因的工作到小麦。二条途径被跟随在内乳改变 Trx h 基因的表示:(1 ) 一个大麦蛋白倡导者和它指向顺序的蛋白质身体导致了 Trx h5 的 overexpression,并且(2 ) Trx h9 的 antisense 构造导致了那基因(Arabidopsis 指明) 的 cytosolic underexpression。Trx h9 的 Underexpression 导致了对在萌芽的 barleyretardation 为 overexpression Trx h5 观察并且推迟了或减少联系的酶的表示的那些相反的效果。类似的酶变化在开发种子被观察。有 underexpressed Trx 的小麦线看了发芽的推迟的 preharvest 没有减少,什么时候在最后的产量在温室或领域成长。有 overexpressed Trx h5 的小麦显示出与同量的变化在 vitro 工作更早:二硫化物蛋白质的增加的溶解度和麦胶蛋白质部分的更低的 allergenicity。结果是在谷物内乳的 Trx h 的水平决定基本性质以及种子的潜在的应用程序的进一步的证据。Yong-Chun Li Jiang-Ping Ren Myeong-Je Cho Su-Mei Zhou Yong-Bum Kim Hong-Xiang Guo Joshua H. Wong Hong-Bin Niu Hyun-Kyung Kim Susumu Morigasaki Peggy G. Lemaux Oscar L. Frick Jun Yin Bob B. Buchanan 2009Molecular Plant2009,2,3:5
4Systematic review of periprosthetic tibia fracture after total knee arthroplasties显示文摘AIM: To investigate the known incidences, treatment options, and related outcomes of periprosthetic tibia fractures after total knee arthroplasty(TKA).METHODS: A literature search was done to identify studies that fit the inclusion criteria. The database search yielded 185 results, which were further reduced by the exclusion criteria to 13 papers, totaling 157 patients that met these criteria. Incidence rates of the different types of periprosthetic tibia fractures were determined and their treatments were subsequently analyzed based on the fracture's subclass, with patient outcomes being overall favorable.RESULTS: Of the 144 documented patients, 54(37.5%) had a subclass C fracture, which are frequently seen in revision arthroplasties or when using cement intraoperatively. The fractures of subclasses A and B occur postoperatively. There were 90 subclass A and B fractures with incidences of 18.75% and 43.75% respectively. When broken down by type, 62(55.36%) were type 1, 24(21.4%) were type 2, 24(21.4%) were type 3, and 2(1.8%) were type 4. Furthermore, from the studies that included origin of injury, the types were further classified as having non-traumatic or traumatic origins. Type 1 had 78%(40/51) non-traumatic origin and 22%(11/51) traumatic origin. Fifteen fractures were type 2, but 5 were falls and 1 through a motor vehicle accident, giving a trauma causation of 40%(6/15). Of the 24 type 3 fractures, 12 were falls and 2 vehicular accidents, leading to a trauma causation of 58%(14/24).CONCLUSION: Type 1 fractures were the most common. Subclass A was treated with locking plates, B required a revision TKA, and C was treated intraoperatively or nonoperatively.Nabil A Ebraheim Joseph R Ray Meghan E Wandtke Grant S Buchanan Chris G Sanford Jiayong LiuZ 2015World Journal of Orthopedics2015,6,8:4
5Preprotein Import into Chloroplasts via the Toc and Tic Complexes Is Regulated by Redox Signals in Pisum sativum显示文摘原子编码 preproteins 的进口是必要的维持叶绿体功能。越过叶绿体信封的大多数先锋蛋白质的识别和转移被二插入膜的蛋白质建筑群,外部的叶绿体的 translocons 和内部信封便于(Toc 和 Tic 建筑群,分别地) 。几个信号被调用了调整 preproteins 的进口。在我们的学习,我们对基于氧化还原作用的进口感兴趣规定由二个信号调停了:规定基于 thiols 并且在新陈代谢的 NADP+/NADPH 比率上。我们寻求了鉴别参予这些的规定的蛋白质搬运小径并且描绘其进口是氧化还原作用依赖者的 preprotein 亚群。我们的结果提供在 Toc 受体和 Toc translocation 隧道的二硫化物桥的形成和减小在所有测试 preproteins 的进口产量上有强烈影响的证据为 translocation 取决于 Toc 建筑群。而且,新陈代谢的 NADP+/NADPH 比率影响 Tic 建筑群,而且大多数,然而并非所有的进口效率的不仅作文,测试的 preproteins。因此,几 Tic subcomplexes 看起来参予不同 preprotein 亚群的 translocation,并且这些建筑群的氧化还原作用活跃的部件多半在调整运输起一个作用。Anna Stengel 2009Molecular Plant2009,2,6:4
6Association Between Molecular Subtypes of Colorectal Cancer and Patient Survival显示文摘Amanda I. Phipps Paul J. Limburg John A. Baron Andrea N. Burnett-Hartman Daniel J. Weisenberger Peter W. Laird Frank A. Sinicrope Christophe Rosty Daniel D. Buchanan John D. Potter Polly A. Newcomb 2014Gastroenterology2014,,:3
7为改善脱水、降低能耗、延长压榨毛布使用寿命优化压区系统的措施显示文摘新式多层有接缝高定量压榨毛布的使用,以及纸机车速不断提高,导致了出压榨总干度不够,无法实现压榨干度最大化。压区脱水可以提高出压榨的干度、降低真空度而且延长压榨毛布的使用寿命。压区脱水要有一些为整个压区系统工作所必须的部件。造纸厂通过收集和监控与纸机性能相对应的数据,就有机会优化系统,以便在许多方面对性能进行改善。David Buchanan 2008中华纸业2008,29,18:3
8Aroma volatile biosynthesis in apples affected by 1-MCP and methyl jasmonate显示文摘S. Kondo S. Setha D.R. Rudell D.A. Buchanan J.P. Mattheis 2004Postharvest Biology and Technology2004,,1:3
9Advances in cellulose ester performance and application显示文摘Kevin J Edgar Charles M Buchanan John S Debenham Paul A Rundquist Brian D Seiler Michael C Shelton Debra Tindall 2001Progress in Polymer Science2001,,9:2
10Ecological Footprint Dynamics of Yunnan, China显示文摘A fundamental element of sustainable development is that humans live within nature's biological capacity. Quantifying this, however, remains a significant challenge for which there are many emerging tools. The concept of the Ecological Footprint is one such accounting tool for comprehensive assessment of the status of sustainable development, based on integration of resource consumption and land capacity, reflecting the human impact on the environment. A region's development is defined as unsustainable when the Ecological Footprint surpasses the biological capacity. In this paper, the Ecological Footprint concept was applied in assessing the development of Yunnan Province, China in a period between 1988 and 2006. The results showed that the Ecological Footprint per capita in Yunnan rose from 0.854 gha in 1988 to 2.11 gha in 2006. Ecological deficit, defined as when the human demand on the land surpasses the regions biological productive capacity, emerged in 1991 and quickly increased from 0.02 gha in 1991 to 1.05 gha in 2006. The increase in the ecological deficit is primarily a result of the rapid increase in population and consumption level. To achieve sustainable development in Yunnan, production and consumption rates need to be modified.LU Ying HE Daming Sam Buchanan LIU Jiang 2009Journal of Mountain Science2009,6,3:2
11Management of Chronic Hepatitis B in Pregnancy显示文摘Corinne Buchanan Tram T. Tran 2010Clinics in Liver Disease2010,,3:2
12Rapid and environmentally friendly preparation of starch esters显示文摘Atanu Biswas R.L. Shogren Gordon Selling J. Salch J.L. Willett Charles M. Buchanan 2008Carbohydrate Polymers2008,,1:2
13Terahertz Semiconductor Quantum Well Devices显示文摘For eventually providing terahertz science with compact and convenient devices,terahertz (1~10THz) quantum-well photodetectors and quantum-cascade lasers are investigated.The design and projected detector performance are presented together with experimental results for several test devices,all working at photon energies below and around optical phonons.Background limited infrared performance (BLIP) operations are observed for all samples (three in total),designed for different wavelengths.BLIP temperatures of 17,13,and 12K are achieved for peak detection frequencies of 9.7THz(31μm),5.4THz(56μm),and 3.2THz(93μm),respectively.A set of THz quantum-cascade lasers with identical device parameters except for doping concentration is studied.The δ-doping density for each period varies from 3.2×1010 to 4.8×1010cm-2.We observe that the lasing threshold current density increases monotonically with doping concentration.Moreover,the measurements for devices with different cavity lengths provide evidence that the free carrier absorption causes the waveguide loss also to increase monotonically.Interestingly the observed maximum lasing temperature is best at a doping density of 3.6×1010cm-2.Liu H C Luo H Ban D Waichter M Song C Y Wasilewski Z R Buchanan M Aers G C SpringThorpe A J Cao J C Feng S L Williams B S Hu Q 2006Journal of Semiconductors2006,27,4:2
14A Putative Nuclear CLE-Like (CLEL) Peptide Precursor Regulates Root Growth in Arabidopsis显示文摘Dear Editor, It is well established that local intercellular signaling networks control cell identity and activity.Secreted peptides have been found to play a central role in this capacity in plants (Matsubayashi and Sakagami,2006;Meng et al.,2010;Meng,2012).Ling Meng Bob B. Buchanan Lewis J. Feldman Sheng Luan 2012Molecular Plant2012,5,4:2
15中国交通工程面临的挑战显示文摘在为上海市政府编写了交通白皮书初稿的4年之后,ColinBuchanan公司又受邀为已出版的白皮书的修改提供建议,以解决交通拥堵问题和确定不同交通方式应起的作用。建议提出应发展比导致拥堵的小汽车和出租汽车更好的交通方式,然后鼓励大众使用它们。依据在上海工作的经历,对中国交通工程面临的部分问题进行了阐述。Malcolm Buchanan Rob Goldup 胡树成 2007城市交通2007,5,5:2
16GaAs/AlGaAs多量子阱空间光调制器入射角度特性研究显示文摘研究了GaAs/AlGaAs多量子阱(MQW)空间光调制器(SLM)在不同入射角度下的调制特性。对腔模位置与入射角度的关系进行了理论计算和实验验证,两者具有较好的一致性。当入射角在0°~75°之间变化时,腔模从871nm变化至845nm,可调节范围达26nm。当入射光从垂直入射变化为约45°入射时,SLM对比度从(CR)3.8提高到16.3,调制电压从9.5V下降至6.5V。理论分析和实验结果表明,入射角度调节能够有效提高GaAs/AlGaAs MQW SLM调制性能。黄寓洋 刘惠春 Wasilewski Z R Buchanan M Laframboise S R 杨晨 崔国新 边历峰 杨辉 张耀辉 2010光电子.激光2010,21,5:2
17抑郁治疗和急性心肌梗死后1年死亡率的相关性:TRIUMPH注册研究显示文摘在急性心肌梗死(acute myocardial infarction,AMI)患者中,抑郁症是很普遍的,并且与不良的生活质量和预后相关。尽管一些国家组织提出了筛选抑郁症的建议,但尚不清楚AMI患者的抗抑郁治疗是否与更好的预后相关。该研究的目的是确定接受抗抑郁治疗是否对患者的预后有影响。方法:刘莉 叶鹏 Smolderen KG Buchanan DM Gosch K Whooley MA Chan PS Vaccarino V Parashar S Shah AJ Ho PM Spertus JA 2017中华高血压杂志2017,25,2:2
18A randomized controlled crossover study comparing synthetic porcine and human secretins with biologically derived porcine secretin to diagnose Zollinger-Ellison Syndrome显示文摘METZ DC BUCHANAN M PURICH E 2001Aliment Pharmacol Ther2001,5,15:1
19Gestational diabetes mellitus显示文摘Buchanan T A Xiang A H 2005J Clin Invest2005,115,3:1
20Involvement of chemokine receptors in breast cancer metastasis显示文摘Muller A Homey B Soto H Ge N Catron D Buchanan M E 2001Nature2001,410,:1
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