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321篇 您的检索式:作者名="DAVID G K"
    题名 作者 年代 出处 被引量
1Q&P钢热处理工艺的开发进展(英文)显示文摘Q&P钢的工艺概念已提出了有些年了,它作为一种热处理工艺,生产的组织具有马氏体和富C的亚稳残余奥氏体。工艺包括:控制淬火形成部分的马氏体,然后热处理以使C从过饱和的马氏体中转移到残余奥氏体中。潜在的应用包括具有好的成型性和抗断裂的高强度钢。应用该工艺可生产薄板和厚板,以及用从长锻材生产热处理元件,甚至于铸铁。自2003年一直在实验室研究,早期的工作结果已有发表。近期的研究主要集中于机理方面的细节。国际范围的独立团队在此研究领域也有很多进展。John G Speer David K Matlock 2009世界钢铁2009,9,1:21
2汽车用钢的最新研究进展显示文摘为满足提高燃油效率及汽车'轻量化'等方面持续的需求,学术界及工业领域一直都很重视钢铁及其替代材料的研发,这两类材料之间的竞争始终十分激烈。对汽车用钢在北美的研究现状进行了概述,并重点介绍了几种冷轧和热轧汽车用钢的研究进展及其生产情况。新一代先进高强钢的发展将依然令人关注并充满机遇。John G Speer David K Matlock Emmanuel de Moor Grant A Thomas 周澍(译) 李晟(校) 2013世界钢铁2013,,5:10
3澳大利亚人乳头状瘤病毒疫苗计划实施5年对年轻人群生殖器疣患病情况的影响:国家调查数据分析显示文摘目的评估2007年中开始的澳大利亚人乳头状瘤病毒(HPV)疫苗计划对生殖器疣患病情况的影响。设计国家调查数据趋势分析。数据来源数据收集于2004--2011年度澳大利亚8所性健康服务机构;其中2所最大的临床中心收集了自我报告的本中心2009年度HPV疫苗现状。研究对象2004--2011年度首次就诊的85770名澳大利亚出生的国民;其中7686(9.0%)名患生殖器疣。主要结局测量比较前疫苗时期(2004—2007年中)和疫苗时期(2007年中-2001年末)不同人群生殖器疣新发病率变化趋势。结果疫苗时期21岁以下和21~30岁女性诊断患有生殖器疣的比例明显下降,发病率分别从2007年度的11.5%和11.3%下降至2011年度的0.85%和3.1%,P均〈0.001。在30岁以上的女性中未发现发病率的明显下降。在21岁以下和21~30岁异性恋男性人群中疫苗时期生殖器疣的发病率较前疫苗时期明显下降,分别由2007年度12.1%和18.2%下降至2011年度2.2%和8.9%,P均〈0.001。30岁以上的异性恋男性人群中发病率无明显下降。2011年235名21岁以下女性在使用HPV疫苗后无新发生殖器疣病例。结论年轻女性生殖器疣发病率的显著下降和2011年度部分年轻女性使用疫苗后的零发病率,说明HPV疫苗获得实验室外的良好功效。异性恋男性生殖器疣发病率的显著下降可能是由于群体免疫所致。Hammad Ali,lecturer Basil Donovan, professor HandanWand,senior lecturer Tim R H Read, sexual health physician David G Regan,senior lecturer Andrew E Grulich, professor Christopher K FaMey, professor Rebecca J Guy, associate professor 尹婕(译) 潘凌亚(校) 2013英国医学杂志中文版2013,16,4:4
4Sofosbuvir with pegylated interferon alfa-2a and ribavirin for treatment-naive patients with hepatitis C genotype-1 infection (ATOMIC): an open-label, randomised, multicentre phase 2 trial显示文摘Kris V Kowdley Eric Lawitz Israel Crespo Tarek Hassanein Mitchell N Davis Michael DeMicco David E Bernstein Nezam Afdhal John M Vierling Stuart C Gordon Jane K Anderson Robert H Hyland Hadas Dvory-Sobol Di An Robert G Hindes Efsevia Albanis William T Symo 2013The Lancet2013,,9883:3
5Hepatocellular carcinoma after Iocoregional therapy:Magnetic resonance imaging findings in falsely negative exams显示文摘AIM:To elucidate causes for false negative magnetic resonance imaging(MRI)exams by identifying imaging characteristics that predict viable hepatocellular carcinoma(HCC)in lesions previously treated with locoregional therapy when obvious findings of recurrence are absent.METHODS:This retrospective institutional review board-approved and Health Insurance Portability and Accountability Act-compliant study included patients who underwent liver transplantation at our center between 1/1/2000 and 12/31/2012 after being treated for HCC with locoregional therapy.All selected patients had a contrast-enhanced MRI after locoregional therapy within 90 d of transplant that was prospectively interpreted as without evidence of residual or recurrenttumor.Retrospectively,2 radiologists,blinded to clinica and pathological data,independently reviewed the pre transplant MRIs for 7 imaging features.Liver explan histopathology provided the reference standard,with clinically significant tumor defined as viable tumor≥1.0cm in maximum dimension.Fisher’s exact test was firs performed to identify significant imaging features.RESULTS:Inclusion criteria selected for 42 patients with 65 treated lesions.Fourteen of 42 patients(33%and 16 of 65 treated lesions(25%)had clinically significant viable tumor on explant histology.None o the 7 imaging findings examined could reliably and reproducibly determine which treated lesion had viable tumor when the exam had been prospectively read as without evidence of viable HCC.CONCLUSION:After locoregional therapy some treated lesions that do not demonstrate any MRI evidence o HCC will contain viable tumor.As such even patients with a negative MRI following treatment should receive regular short-term imaging surveillance because some have occult viable tumor.The possibility of occult tumo should be a consideration when contemplating any action which might delay liver transplant.David Becker-Weidman Jesse M Civan Sandeep P Deshmukh Christopher G Roth Steven K Herrine Laurence Parker Donald G Mitchell 2016World Journal of Hepatology2016,8,16:2
6The impact of ipsilateral testicular atrophy on semen quality and sperm DNA fragmentation response to varicocele repair显示文摘Varicoceles adversely impact semen quality and sperm DNA fragmentation,which typically improve with surgical repair.Some men with varicoceles have ipsilateral testicular atrophy due to damage from the varicocele.This study assessed semen quality and the sperm DNA fragmentation index(DFI)response to varicocele repair in men with ipsilateral testicular atrophy(TA)versus men with no testicular atrophy(NTA).Semen parameter values and DFI in both groups were compared preoperatively and postoperatively.The Mann-Whitney U test and the Wilcoxon signed-rank test were used where appropriate.There were 20 men in the TA group and 121 men in the NTA group with no difference in age,varicocele grade,or preoperative semen parameter values between the two groups.The NTA group had a higher preoperative DFI than the TA group.Both groups showed improvement in semen quality postoperatively,only the TA group showed a significant improvement in DFI,whereas the NTA group showed significant improvements in several parameter values and DFI.The change from preoperative to postoperative parameter values when comparing the two groups revealed a difference in total sperm motile count and DFI,with a larger mean improvement in the NTA group than in the TA group.Both TA and NTA groups showed improved semen quality and DFI after varicocele repair,but the NTA group had more improvement than the TA group.However,only total motile count(TMC)and DFI had a significantly greater mean change in preoperative to postoperative response in the NTA group than in the TA group.Parviz K Kavoussi Natasha Abdullah Melissa S Gilkey Caitlin Hunn G Luke Machen Shu-Hung Chen Keikhosrow M Kavoussi Amy Esqueda J David Wininger Shahryar K Kavoussi 2021Asian Journal of Andrology2021,23,2:2
7Surgical left atrial appendage occlusion during cardiac surgery: A systematic review and meta-analysis显示文摘AIM To evaluate the safety and efficacy of surgical left atrial appendage occlusion(s-LAAO) during concomitant cardiac surgery.METHODS We performed a comprehensive literature search through May 31 st 2018 for all eligible studies comparing s-LAAO vs no occlusion in patients undergoing cardiac surgery. Clinical outcomes during follow-up included: embolic events, stroke, all-cause mortality, atrial fibrillation(AF), reoperation for bleeding and postoperative complications. We further stratified the analysis based on propensity matched studies and AF predominance.RESULTS Twelve studies(n = 40107) met the inclusion criteria.s-LAAO was associated with lower risk of embolic events(OR: 0.63, 95%CI: 0.53-0.76; P < 0.001) and stroke(OR: 0.68, 95%CI: 0.57-0.82; P < 0.0001).Stratified analysis demonstrated this association was more prominent in the AF predominant strata. There was no significant difference in the incidence risk of allcause mortality, AF, and reoperation for bleeding and postoperative complications.CONCLUSION Concomitant s-LAAO during cardiac surgery was associated with lower risk of follow-up thromboembolic events and stroke, especially in those with AF without significant increase in adverse events. Further randomized trials to evaluate long-term benefits of s-LAAO are warranted.Varunsiri Atti Mahesh Anantha-Narayanan Mohit K Turagam Scott Koerber Sunil Rao Juan FViles-Gonzalez Rakesh MSuri Poonam Velagapudi Dhanunjaya Lakkireddy David G Benditt 2018World Journal of Cardiology2018,10,11:2
8Constitutive renal Rel/nuclear factor-κB expression in Lewis polycystic kidney disease rats显示文摘AIM:To determine the temporal expression and pattern of Rel/nuclear factor(NF)-κB proteins in renal tissue in polycystic kidney disease(PKD). METHODS: The renal expression of Rel/NF-κB proteins was determined by immunohistochemistry, immunofluorescence and immunoblot analysis in Lewis polycystic kidney rats(LPK, a genetic ortholog of human nephronopthsis-9) from postnatal weeks 3 to 20. At each timepoint, renal disease progression and the mR NA expression of NF-κB-dependent genes(TNFa and CCL2) were determined. NF-κB was also histologicaly assessed in human PKD tissue.RESULTS: Progressive kidney enlargement in LPK rats was accompanied by increased renal cell proliferation and interstitial monocyte accumulation(peaking at weeks 3 and 10 respectively), and progressive interstitial fibrosis(with a smooth muscle actin and Sirius Red deposition significantly increased compared to Lewis kidneys from weeks 3 to 6 onwards). Rel/NF-κB proteins(phosphorylated-p105, p65, p50, c-Rel and RelB) were expressed in cystic epithelial cells(CECs) of LPK kidneys as early as postnatal week 3 and sustained until latestage disease at week 20. From weeks 10 to 20, nuclear p65, p50, Rel B and cytoplasmic IκBa protein levels, and TNFa and CCL2 expression, were upregulated in LPK compared to Lewis kidneys. NF-κB proteins were consistently expressed in CECs of human PKD. The DNA damage marker γ-H2AX was also identified in the CECs of LPK and human polycystic kidneys. CONCLUSION: Several NF-κB proteins are consistently expressed in CECs in human and experimental PKD. These data suggest that the upregulation of both the canonical and non-canonical pathways of NF-κB signaling may be a constitutive and early pathological feature of cystic renal diseases.Michelle HT Ta Kristina G Schwensen David Liuwantara David L Huso Terry Watnick Gopala K Rangan 2016World Journal of Nephrology2016,5,4:2
9Managing lessons learned and tacit knowledge in new product development 显示文摘KEITH G URSULA K DAVID B 2010Research Technology Management2010,53,4:1
10Accelerated Amyloid Deposition in the Brains of Transgenic Mice Coexpressing Mutant Presenilin 1 and Amyloid Precursor Proteins显示文摘David R Borchelt Tamara Ratovitski Judy van Lare Michael K Lee Vicki Gonzales Nancy A Jenkins Neal G Copeland Donald L Price Sangram S Sisodia 1997Neuron1997,,4:1
11Outcome of transurethral prostatectomy for the palliative management of lower urinary tract symptoms in men with prostate cancer显示文摘Vincent J G Vinod K David L 2006Int J Urol2006,13,6:1
12The effects of system and geometric parameters on abrasive water jet nozzle wear显示文摘MADHUSARATHI N DAVID G T THOMAS J K 2002International Jour- nal of Machine Tools b- Manufacture2002,42,:1
13Relevance of Subcor- tical Stroke in Dysphagia显示文摘Cola Monique G Daniels Stephanie K Corey David M 2010Stroke2010,41,3:1
14Levels of Expression of P-Selectin, E-Selectin, and Intercellular Adhesion Molecule-1 in Coronary Atherectomy Specimens from Patients With Stable and Unstable Angina Pectoris显示文摘Alan N Tenaglia MD Andrew J Buda MD Robert G Wilkins MD Michael K Barron MD Paul R Jeffords BS Khoa Vo BS Maureen O Jordan BS Barry A Kusnick MD David J Lefer PhD 1997The American Journal of Cardiology1997,,6:1
15The Medicinal Plants of Uzbekistan and Kyrgyzstan显示文摘David E Z lgor V B Anvar G K 2012Medicinal Plants of Central Asia: Uzbekistan and Kyrgyzstan2012,,7:1
16Fast one-phase oil-rich processes for the preparation of vegetable oil methyl esters显示文摘Babcock David G B Konar Samir K Mao Vinnie 1996Biomass andBioenergy1996,11,1:1
17Clinical implications of borte- zomib in frontline treatment of newly diagnosed multiple my- elome显示文摘Ohashi K Paul G David I 2008GanToKagakuRyobo2008,35,:1
18Fast one-phase oil-rich processes for the preparation of vegetable oil methylesters显示文摘David G B B Samir K K Vinnie M 1996Biomass & Bioenergy1996,111,:1
19Wellens’ Syndrome显示文摘Thomas K Tandy David P Bottomy Joseph G Lewis 1999Annals of Emergency Medicine1999,,3:1
20Effectiveness of various cover scenarios on the rate of sulfide oxidation of mine tailings 显示文摘Connie G R Mayer K U David R J 2003Journal of Hydrology2003,271,14:1
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