维普中文期刊产品整合服务
2608篇 您的检索式:作者名="s NA"
    题名 作者 年代 出处 被引量
1The Qitai radio telescope显示文摘This study presents a general outline of the Qitai radio telescope(QTT)project.Qitai,the site of the telescope,is a county of Xinjiang Uygur Autonomous Region of China,located in the east Tianshan Mountains at an elevation of about 1800 m.The QTT is a fully steerable,Gregorian-type telescope with a standard parabolic main reflector of 110 m diameter.The QTT has adopted an umbrella support,homology-symmetric lightweight design.The main reflector is active so that the deformation caused by gravity can be corrected.The structural design aims to ultimately allow high-sensitivity observations from 150 MHz up to115 GHz.To satisfy the requirements for early scientific goals,the QTTwill be equipped with ultra-wideband receivers and large field-of-view multi-beam receivers.A multi-function signal-processing system based on RFSo C and GPU processor chips will be developed.These will enable the QTT to operate in pulsar,spectral line,continuum and Very Long Baseline Interferometer(VLBI)observing modes.Electromagnetic compatibility(EMC)and radio frequency interference(RFI)control techniques are adopted throughout the system design.The QTT will form a world-class observational platform for the detection of lowfrequency(nano Hertz)gravitational waves through pulsar timing array(PTA)techniques,pulsar surveys,the discovery of binary black-hole systems,and exploring dark matter and the origin of life in the universe.The QTT will also play an important role in improving the Chinese and international VLBI networks,allowing high-sensitivity and high-resolution observations of the nuclei of distant galaxies and gravitational lensing systems.Deep astrometric observations will also contribute to improving the accuracy of the celestial reference frame.Potentially,the QTT will be able to support future space activities such as planetary exploration in the solar system and to contribute to the search for extraterrestrial intelligence.Na Wang Qian Xu Jun Ma Zhiyong Liu Qi Liu Hailong Zhang Xin Pei Maozheng Chen Richard N.Manchester Kejia Lee Xingwu Zheng Hans J.Kärcher Wulin Zhao Hongwei Li Dongwei Li Martin Süss Matthias Reichert Zhongyi Zhu Congsi Wang Mingshuai Li Rui Li Ning Li Guljaina Kazezkhan Wenming Yan Gang Wu Lang Cui Ming Zhang Haitao Li 2023Science China(Physics,Mechanics & Astronomy)2023,66,8:14
26min步行试验中不同指令对行走距离的影响显示文摘6min步行试验(6-minwalktest,6MWT)作为测定心肺功能的一种方法,一直以使患者走的尽可能远为目标,然而,特定的步行指令对患者6MWT测定的影响尚不清楚。方法:纳入肺动脉高压(pulmonaryarterialhypertension,PAH)、特发性肺间质纤维化(idiopathicpulmonaryfibrosis,IPF)和其他类型的间质性肺疾病(interstitiallungdisease,ILD)患者,刘莉 叶鹏 Weir NA Brown AW Shlobin OA Smith MA Reffett T Battle E Ahmad S Nathan SD 2014中华高血压杂志2014,22,2:13
3Performance of the Prostate Health Index in predicting prostate biopsy outcomes among men with a negative digital rectal examination and transrectal ultrasonography显示文摘[-2]proPSA (p2PSA ) 和它的衍生物, p2PSA-to-free PSA 比率(% p2PSA ) ,和前列腺健康索引(PHI ) 极大地在前列腺活体检视有或没有前列腺癌症(PCa ) 改进了在人之间的辨别。然而,很少在数字直肠的考试(DRE ) 和 transrectal ultrasonography (TRUS ) 是否定的情况中对他们的表演被知道。在有否定 DRE 和 TRUS 的中国的 261 个连续病人的一个未来的队被招募并且经历前列腺活体检视。在活体检视被用来测量各种各样的 PSA 衍生物以前,一件浆液样品收集了,包括总数前列腺特定的抗原(tPSA ) ,免费 PSA,和 p2PSA。为每个病人, free-to-total PSA 比率(% fPSA ) , PSA 密度(PSAD ) , p2PSA-to-free PSA 比率(% p2PSA ) ,和 PHI 是计算的。歧视的性能在在 91% 敏感操作典型曲线(AUC ) 和活体检视率的接收装置下面用区域被估计。在关于年龄, tPSA, % fPSA, PSAD, p2PSA, % p2PSA,和 PHI 的全部队以内的 AUC 分数分别地是 0.598, 0.751, 0.646, 0.789, 0.814, 0.808,和 0.853。PHI 是前列腺活体检视结果的最好的预言者,特别在有 10.1-20 ng ml −1 的 tPSA 的病人。与另外的标记相比,在 91% 的敏感, PHI 为决定哪个人不需要经历活体检视是最有用的,从而避免不必要的过程。PHI 的使用能由在中国与否定 DRE 和 TRUS 在人之中预言前列腺活体检视结果改进 PCa 察觉的精确性。Guo-Peng Yu Rong Na Ding-Wei Ye Jun Qi Fang Liu Hai-Tao Chen Yi-Shuo Wu Gui-Ming Zhang Jie-Lin Sun Yao Zhu Li-Qun Huang Shan-Cheng Ren De-Ke Jiang S Lilly Zheng Hao-WenJiang Ying-Hao Sun Qiang Ding Jianfeng Xu 2016Asian Journal of Andrology2016,18,4:10
4酒精摄入、心脏生物标志物和心房颤动风险与不良结局显示文摘酒精摄入和新发心房颤动相关性证据不一,尤其是在低剂量下。该研究评估欧洲队列在整个饮酒范围内酒精摄入、生物标志物和新发心房颤动的关系。方法和结果:在一个以社区为基础的汇集队列中,研究者随访107845人,以评估酒精摄入(酒精种类和饮酒方式)与新发心房颤动的关系。研究者收集经典心血管病危险因素和新发心力衰竭的信息,并检测生物标记物氨基末端脑钠肽前体和高敏肌钙蛋白I。陈嘉睿(译) 练桂丽((审校) Csengeri D Sprünker NA Di Castelnuovo A Niiranen T Vishram-Nielsen JK Costanzo S S derberg S Jensen SM Vartiainen E Donati MB Magnussen C Camen S Gianfagna F L chen ML Kee F Kontto J Mathiesen EB Koenig W Stefan B de Gaetano G J rgensen T Kuulasmaa K Zeller T Salomaa V Iacoviello L Schnabel RB 2021中华高血压杂志2021,29,2:9
5骨折相关性感染定义的共识显示文摘骨折相关性感染(fracture related infection,FRI)是创伤骨科一种常见的严重并发症.迄今为止,尚无明确定义,因此很难对该并发症带来的影响进行准确评估和对现有的研究展开比较.为解决这一难题,在AO基金会的支持下,我们成立了一个由科学家和医学专家组成的专家组,旨在对FRI定义达成的共识.Metsemakers WJ Morgenstern M McNally MA Moriarty TF McFadyen I Scarborough M Athanasou NA Ochsner PE Kuehl R Raschke M Borens O 谢肇 Velkes S Hungerer S Kates SL Zalavras C Giannoudis PV Richard RG Verhofstad MH 喻胜鹏 孙东 汪小华 2018中华骨科杂志2018,38,9:8
6Admission Glucose and In-hospital Mortality after Acute Myocardial Infarction in Patients with or without Diabetes: A Cross-sectional Study显示文摘Shi Zhao Karthik Murugiah Na Li Xi Li Zi-Hui Xu Jing Li Chen Cheng Hong Mao Nicholas S Downing Harlan M Krumholz Li-Xin Jiang 2017Chinese Medical Journal2017,,7:6
7Therapeutic proteasome inhibition in experimental acute pancreatitis显示文摘AIM: To establish the therapeutic potential of proteasome inhibition, we examined the therapeutic effects of MG132 (Z-Leu-Leu-Leu-aldehyde) in an experimental model of acute pancreatitis.METHODS: Pancreatitis was induced in rats by two hourly intraperitoneal (ip) injections of cholecystokinin octapeptide (CCK; 2 x 100 μg/kg) and the proteasome inhibitor MG132 (10 mg/kg ip) was administered 30 min after the second CCK injection. Animals were sacrificed 4 h after the first injection of CCK.RESULTS: Administering the proteasome inhibitor MG132 (at a dose of 10 mg/kg, ip) 90 min after the onset of pancreatic inflammation induced the expression of cell-protective 72 kDa heat shock protein (HSP72) and decreased DNA-binding of nuclear factor-kB (NF-kB). Furthermore MG132 treatment resulted in milder inflammatory response and cellular damage, as revealed by improved laboratory and histological parameters of pancreatitis and associated oxidative stress.CONCLUSION: Our findings suggest that proteasome inhibition might be beneficial not only for the prevention, but also for the therapy of acute pancreatitis.Tamás Letoha Liliána Z Fehér László Pecze Csaba Somlai Ilona Varga József Kaszaki Gábor Tóth Csaba Vizler László Tiszlavicz Tamás Takács 2007World Journal of Gastroenterology2007,13,33:5
8Influence of norcantharidin on proliferation,proliferation-related gene proteins prolifera-ting cell nuclear antigen and Ki-67 of human gallbladder carcinoma GBC-SD cells显示文摘BACKGROUND: Gallbladder carcinoma is a highly lethal and aggressive disease with early metastasis, strong invasion and poor prognosis. Most patients with this disease are at the advanced and un-resectable stage and should be consi- dered for palliative treatment such as chemotherapy and ra- diotherapy. Unfortunately, reports of chemotherapy and radiotherapy for gallbladder carcinoma are disappointing. We investigated the influence of norcantharidin (NCTD) on proliferation, proliferation-related gene proteins PCNA and Ki-67 of human gallbladder carcinoma GBC-SD cells in vitro. METHODS: GBC-SD cell lines of human gallbladder carci- noma were cultured by the cell culture technique. The ex- periment was divided into NCTD group and control group. The tetrazolium-based colorimetric assay was used to evaluate cell growth. The streptavidin-biotin complex method was used to determine the expressions of prolifera- tion-related gene proteins PCNA and Ki-67 of human gall- bladder carcinoma GBC-SD cells. RESULTS: NCTD inhibited the growth and proliferation of GBC-SD cells from 10 mg/L or after 6 hours in a dose- and time-dependent manner, with the IC50 value of 56.18 μg/ ml at 48 hours. After treatment with NCTD, the expression of PCNA (0.932 ±0.031 vs. 0.318 ±0.023, P<0.001) and Ki-67 (0.964 ±0.092 vs. 0.297 ±0.018, P<0.001) proteins were decreased significantly. CONCLUSION: NCTD inhibits the proliferation of human gallbladder carcinoma GBC-SD cells in vitro and the expres- sion of their proliferation-related gene proteins PCNA and Ki-67.Yue-Zu Fan, Jin-Ye Fu, Ze-Ming Zhao and Cun-Qiu Chen Shanghai, China Department of Surgery, Tongji Hospital of Tongji U- mversity, Shanghai 200065, China Department of Surgery, Pudong People’ s Hospital, Shanghai 201200 , Chi- na 2004Hepatobiliary & Pancreatic Diseases International2004,3,4:5
9持续气道正压通气在预防阻塞性睡眠呼吸暂停患者心血管事件中的作用显示文摘阻塞性睡眠呼吸暂停(obstructive sleep apnea,OSA)导致阵发性低氧血症,夜间交感神经系统激活,血压、氧化应激和炎症指标的升高以及高凝血症。较大的胸内负压波动也会给心脏和大血管施加机械应力。基于人群和睡眠诊所的队列研究显示,OSA与心脑血管事件,特别是脑卒中相关。McEvoy RD Antic NA Heeley E Luo Y Ou Q Zhang X Mediano O Chen R Drager LF Liu Z Chen G Du B McArdle N Mukherjee S Tripathi M Billot L Li Q Lorenzi-Filho G Barbe F Redline S Wang J Arima H Neal B White DP Grunstein RR Zhong N Anderson CS 练桂丽 叶鹏 2016中华高血压杂志2016,24,11:4
10Population-standardized genetic risk score: the SNP-based method of choice for inherited risk assessment of prostate cancer显示文摘几条不同途径对为决定前列腺癌症(PCa ) 风险的临床医生可得到。利用单个核苷酸多型性(SNP ) 的各种各样的 PCa 风险评价方法的临床的有效性被建立了;然而,这些基于 SNP 的方法没被比较。这研究的目的是为 PCa 风险评价比较三个最通常使用的基于 SNP 的方法。参加者是人(n = 1654 ) 在 PCa 开发的未来的研究注册了。59 PCa 联系风险的 SNP 的遗传型在这个队是可得到的。精明的基于 SNP 的基因风险分数(GRS ) 的三个方法被用于象风险等位基因计数那样的单个疾病风险的评估(GRS 皇家装甲兵) ,加权的风险等位基因计数(GRS-wRAC ) ,和标准化人口的基因风险得分(GRS-PS ) 。吝啬的 GRS 被计算,并且表演在操作典型曲线(AUC ) 和积极预兆的价值(PPV ) 的接收装置下面用区域被比较。所有基于 SNP 的方法被发现独立地与 PCa 被联系(所有 P <0.05;因此他们的临床的有效性) 。分别地,在人与或没有 GRS 皇家装甲兵使用的 PCa 的吝啬的 GRS 用 GRS-wRAC 是 55.15 和 53.46 分别地,是 7.42 和 6.97,使用的 GRS-PS 是 1.12 和 0.84,分别地(所有 P <0.05 为病人与或没有 PCa 之间的差别) 。在基于 AUC 从 non-PCa 区别 PCa 并且在预言 PCa 同样执行的所有三个基于 SNP 的方法基于 PPV 冒险(所有 P >0.05 为在三个方法之间的比较) ,并且所有三个基于 SNP 的方法比家庭历史有显著地更高的 AUC (所有 P <0.05 ) 。从这研究的结果建议当三个大多数通常使用了时, 基于SNP 的方法在在人口水平从 non-PCa 区别 PCa 同样表现了,因为, GRS-PS 是为在单个水平的风险评价的选择的方法它的价值(在 1.0 代表平均人口风险的地方)能容易不管在计算使用的联系风险的 SNP 的数字被解释。Carly A Conran Rong Na Haitao Chen Deke Jiang Xiaoling Lin S Lilly Zheng Charles B Brendler Jianfeng Xu 2016Asian Journal of Andrology2016,18,4:4
11心脏病及非心脏病患者降低舒张压的效果:收缩压干预试验结果分析显示文摘收缩压和舒张压低于何种阈值时心血管事件增多仍然不明确。应用收缩压干预试验(systolic blood pressure intervention trial,SPRINT)的数据,研究者评估了1519例心血管病患者和7574位非心血管病者的收缩压和舒张压与心血管事件之间的关系。刘青 叶鹏 Khan NA Rabkin SW Zhao Y McAlister FA Park JE Guan M Chan S Humphries KH 2018中华高血压杂志2018,26,6:3
12脂质组学改善传统危险因素预测的2型糖尿病患者的心血管事件显示文摘临床脂质测定并未显示出糖尿病或心血管病相关的脂质代谢改变的复杂性。脂质组学则能够评估可作为疾病风险潜在标志物的数百种脂质种类。方法:纳入来自糖尿病治疗和血管保护行动。刘莉 叶鹏 Alshehry ZH Mundra PA Barlow CK Mellett NA Wong G McConville MJ Simes J Tonkin AM Sullivan DR Barnes EH Nestel PJ Kingwell BA Marre M Neal B Poulter NR Rodgers A Williams B Zoungas S Hillis GS Chalmers J Woodward M Meikle PJ 2016中华高血压杂志2016,24,10:3
13Decreased apoptosis in the brain and premature lethality in CPP32-deficient mice显示文摘Kuida K Zheng TS Na S 0,,:2
14高密度脂蛋白可追踪脑卒中恢复情况显示文摘前瞻性队列研究质疑高密度脂蛋白胆固醇(high density lipoprotein cholesterol,HDL-C)在脑卒中风险预测中的价值。该文旨在探讨长期功能恢复与高密度脂蛋白(high density lipoprotein,HDL)蛋白质组和功能的关系。方法与结果:测定急性缺血性脑卒中后2个时间点(24小时,35例;96小时,20例)和35例对照组HDL蛋白组成和功能(胆固醇流出能力)的变化。Plubell DL Fenton AM Rosario S Bergstrom P Wilmarth PA Clark WM Zakai NA Quinn JF Minnier J Alkayed NJ Fazio S Pamir N 刘青(译) 刘莉(摘/审校) 2020中华高血压杂志2020,28,11:2
15Obsessive-compulsive disorder: boundary issues显示文摘Fineberg NA Saxena S Zohar J 2007CNS Spectr2007,,:1
16Correlation of c-fos,p53,and PCNA expression with treatment outcome in osteosarcoma显示文摘 Mihalor M Chachlani NA 2000J Surg Oncol2000,73,2:1
17Optimal contracts for teams 显示文摘Na S 2003The Pennsylvania State University Working paper2003,,5:1
18local and systemic induction of CD4+CD25+regulatory T cell population by non-Hodykin lymphoma显示文摘Mittal S Marshall NA Duncan L 2008Blood2008,111,11:1
19Focal cortical dysplasia: comparison of MRI and FDG-PET 显示文摘Kim S K Na D G Byun H S 2000J Comput Assist Tomogr2000,24,2:1
20Can sensitivity of voided urinary cytology or bladder wash cytology be improved by the use of different urinary portions ? 显示文摘Mungan NA Kulacoglu S Basar M 1999UrolInt1999,62,4:1
返回顶部 每页显示:
共131页 首页 上一页 第1页 下一页 末页 /131 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费