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| 1 | OPTICAL PROPERTIES OF GeO_2 AND Ge NANOCRYSTALS显示文摘he co m pound m aterial of n m size particles Ge O2 Si O2 w as synthesied through hydrolysis of Si( O C2 H4) and Ge Cl4 . A heat treatm ent w as carried out for the sa m ples at 100 ~1200 ℃in air . Its optical property w as deter mined by U V Vis spectur m . We have found that theabsorption edge of spectru m shifted progressively to longer w avelengths . The quantu m size ef fect of nanocrystals appears because crystals gro w and energy of optical band gap reduces d ueto the influence of te m perature . By the analysis of X ray diffraction w e have observed theprocess in w hich the structure of particles changed fro m disorder into order . | Y.H.Zhou 1) ,Y.Y.Feng 2) and H.Y.Lu 2) 1)Department of Physics Nanjing Normal University, Nanjing 210097,China 2)Physics and Ch寁O P T I C A L P R O P E R T I E S O F Ge O2 A N D Ge N A N O C R Y S T A L S Y. H. Zhou1) , Y. Y. Feng2) | 1999 | Acta Metallurgica Sinica(English Letters)1999,12,5: | 22 |
| 2 | Modified boron neutron capture therapy for malignant gliomas performed using epithermal neutron and two boron compounds with different accumulation mechanisms: an efficacy study based on findings on neuroimages显示文摘 | Miyatake S Kawabata S Kafimoto Y Aoki A Yokoyama K Yamada M Kuroiwa T Tsuji M Imahori Y Kirihata M Sakurai Y Masunaga S Nagata K Maruhashi A Ono K | 2005 | 中国神经肿瘤杂志2005,3,4: | 14 |
| 3 | Inhibition of neprilysin by infusion of thiorphan into the hippocampus causes an accumulation of amyloid Beta and impairment of learning and memory.显示文摘 | Zou LB Mouri A Iwata N Saido TC Wang D Wang MW Mizoguchi H Noda Y Nabeshima T | 2006 | 中国生物学文摘2006,20,9: | 10 |
| 4 | 血清netrin-1增加与缺血性脑卒中预后改善相关显示文摘先前的实验研究表明,血清netrin-1与缺血性脑卒中进展相关。进一步了解缺血性脑卒中患者中netrin-1的变化可能为缺血性脑卒中的预后评估提供新的思路。该研究旨在探讨血清netrin-1与缺血性脑卒中预后的关系。研究人员测定3346例中国急性缺血性脑卒中抗高血压试验(China antihypertensive trial in acute ischemic stroke,CATIS)中缺血性脑卒中患者基线血清netrin-1水平,所有患者均在脑卒中发病后3个月进行随访。主要观察指标是脑卒中发病后3个月内死亡和严重残疾(改良Rankin 量表评分≥3)。 | 刘莉 叶鹏 Guo D Zhu Z Zhong C Peng H Wang A Xu T Peng Y Xu T Chen CS Li Q Ju Z Geng D Chen J Zhang Y He J | 2019 | 中华高血压杂志2019,27,5: | 6 |
| 5 | 血流介导的血管舒张,硝酸甘油诱导的血管舒张,基线肱动脉直径,充血剪切应力与心血管病危险因素之间的相关性显示文摘血流介导的血管舒张功能(flow-mediated vasodilation,FMD)已被用于评估内皮功能。充血性剪切应力(hyperemic shear stress,HSS,一种FMD的刺激因素)、硝酸甘油诱导的血管舒张(nitroglycerine-induced vasodilation,NID,非内皮依赖性血管舒张指数)以及基线肱动脉直径(brachial artery diameter,BAD)也参与血管舒张反应。 | 刘青 叶鹏 Maruhashi T Iwamoto Y Kajikawa M Oda N Kishimoto S Matsui S Hashimoto H Aibara Y Yusoff FM Hidaka T Kihara Y Chayama K Noma K Nakashima A Goto C Hida E Higashi Y | 2018 | 中华高血压杂志2018,26,1: | 5 |
| 6 | 脑缺血后N-myc下游调控基因2保护血脑屏障完整性显示文摘脑缺血后血脑屏障(BBB)的破坏与外周细胞向脑内浸润、病孔损形成与进展、以及临床病程恶化密切相关。目前BBB完整性的调控机制,尤其是在永久性缺血后的调控机制尚未明确。本研究使用小鼠永久性脑缺血模型进行相关研究,结果显示,星形胶质细胞N-myc下游调控基因2(NDRG2)可能是缺血性脑卒中后BBB通透性的调控分子,该分子与分化和应激相关。免疫组化显示,在永久性大脑中动脉闭塞(MCAO)后,NDRG2在星形胶质细胞中的表达显著增加。敲除NDRG2基因,脑梗死体积增加,免疫细胞在缺血同侧大脑半球积聚增加。MCAO后,NDRG2基因敲除小鼠缺血侧皮质的缺血灶内及灶周血管周围区域内的血清蛋白(包括纤维蛋白原和免疫球蛋白)的外渗增强此之,MCAO后NDRG2基因敲除小鼠体内基质金属蛋白酶(MMPs)的表达也显著增加。在细胞培养中,NDRG2-/-星形胶质细胞中MMP-3的表达和分泌增加,这种增加可被腺病毒介导的NDRG2再表达所逆转。综上所述,脑缺血后,星形胶质细胞内的NDRG2可能通过调节MMP的表达,而在BBB通透性的调节和免疫细胞浸润中起到重要作用。 | Takarada-Iemata M Yoshikawa A Ta HM Okitani N Nishiuchi T Aida Y Kamide T Hattori T Ishii H Tamatani T Le TM Roboon J Kitao Y Matsuyama T Nakada M Hori O 聂昊 | 2018 | 神经损伤与功能重建2018,13,4: | 4 |
| 7 | 厚壁奥氏体焊缝超声波检测之探究(英文)显示文摘由于奥氏体焊缝中材料性能的各向异性和微观组织结构的不同,奥氏体焊缝的超声波检测是非常困难的。超声波在奥氏体焊缝中会沿金属结晶方向发生偏转,并在焊缝边界上发生散射。过去十年来,人们开发了多种模拟各向异性材料中声波传播的仿真工具。本文则以常规超声波检测方法为基础,将声线跟踪法和弹性动力学有限积分技术(EFIT)相结合,应用于含晶间应力腐蚀裂纹的厚壁奥氏体焊缝中,其结果显示声线跟踪法和弹性动力学有限积分技术(EFIT)结合应用,有助于超声波检测参数的选取。 | Han T Y Khler B Schmitz V Zimmer A Langenberg K J | 2009 | 无损检测2009,31,11: | 3 |
| 8 | Gastric intestinal metaplasia is associated with gastric dysplasia but is inversely correlated with esophageal dysplasia显示文摘AIM To determine which clinical factors might be associated with gastric intestinal metaplasia(IM) in a North American population.METHODS Pathology and endoscopy databases at an academicmedical center were reviewed to identify patients with and without gastric IM on biopsies for a retrospective cohort study. Patient demographics, insurance status, and other clinical factors were reviewed.RESULTS Four hundred and sixty-eight patients with gastric IM(mean age: 61.0 years ± 14.4 years, 55.5% female) and 171 without gastric IM(mean age: 48.8 years ± 20.8 years, 55.0% female) were compared. The endoscopic appearance of atrophic gastritis correlated with finding gastric IM on histopathology(OR = 2.05, P = 0.051). Gastric IM was associated with histologic findings of chronic gastritis(OR = 2.56, P < 0.001), gastric ulcer(OR = 6.97, P = 0.015), gastric dysplasia(OR = 6.11, P = 0.038), and gastric cancer(OR = 6.53, P = 0.027). Histologic findings of Barrett's esophagus(OR = 0.28, P = 0.003) and esophageal dysplasia(OR = 0.11, P = 0.014) were inversely associated with gastric IM. Tobacco use(OR = 1.73, P = 0.005) was associated with gastric IM.CONCLUSION Patients who smoke or have the endoscopic finding of atrophic gastritis are more likely to have gastric IM and should have screening gastric biopsies during esophagogastroduodenoscopy(EGD). Patients with gastric IM are at increased risk for having gastric dysplasia and cancer, and surveillance EGD with gastric biopsies in these patients might be reasonable. | Justin M Gomez James T Patrie Wissam Bleibel Jeanetta W Frye Bryan G Sauer Vanessa M Shami Edward B Stelow Christopher A Moskaluk Andrew Y Wang | 2017 | World Journal of Gastrointestinal Endoscopy2017,9,2: | 3 |
| 9 | 评估内燃机隔振系统功率流传递的一种新模型(英文)显示文摘为准确评估弹性复杂隔振基础条件下振动内燃机的功率流传递水平,采用Mindlin板替代传统的Kirchihoff薄板,建立了一种涵盖多种隔振基础形式的普适模型。运用子结构技术和变分理论,推导了隔振系统的控制方程以及传递到较厚甚至不同配置方式的各向异性复杂梁式基础的功率流。与基于各向同性薄板基础的传统模型相比较,研究了普适隔振系统功率流的传递特性。仿真研究表明,所提模型是有效的,可得到比传统模型更加准确的结果。 | 牛军川 葛培琪 林志华 梁以德 宋孔杰 LIM C W LEUNG A Y T | 2009 | 内燃机学报2009,27,1: | 3 |
| 10 | Frequent amplification of a chr19q13.41 microRNA polycistron in aggressive primitive neuroectodermal brain tumors显示文摘 | Li M Lee KF Lu Y Clarke I Shih D Eberhart C Collins VP Van Meter T Picard D Zhou L Boutros PC Modena P Liang ML Scherer SW Bouffet E Rutka JT Pomeroy SL Lau CC Taylor MD Gajjar A Dirks PB Hawkins CE Huang A. | 2009 | 中国神经肿瘤杂志2009,7,4: | 3 |
| 11 | 钻孔千斤顶压裂测量技术的发展和原地测量显示文摘为了测量距地表1 000m以下位置的地壳应力状态,我们研究并开发了钻孔千斤顶压裂技术。技术的原理是:当钻孔千斤顶对钻孔壁加载时,与钻孔轴向平行的方向将会产生两个相对的新裂隙;卸载之后,如果千斤顶对钻孔壁的同一个地方进行施压,这对裂隙将会再次张开。与钻孔轴向垂直的平面上的两个主应力的大小和方向分别是由重张压力和裂隙的方向决定的。这个技术与水压致裂法相似。因此,测量深度没有理论上的限制。这个技术的特点就是它可以产生一对任意方向的轴向裂隙,可以测量裂隙张开的位移大小,根据测量结果可以精确计算重张压力的大小。在实地测试中,先用水压致裂法形成裂隙,再用钻孔压力千斤顶法加以与水压近似相等的压力值使之重张。本文介绍了我们的数值分析结果、实验室实验和现场测试。 | Yokoyama T Ogawa K Sano O Hirata A Mizuta Y 徐伟(译) 张雷 姚瑞 沙鹏(校) | 2011 | 国际地震动态2011,,1: | 3 |
| 12 | 掺碲硒化镓晶体的光学性能(英文)显示文摘采用水平区熔法生长了碲(Te)掺杂浓度(质量百分比)分别为0.05%,0.1%,0.5%,1%,2%的硒化镓(GaSe)晶体,并分别对掺杂浓度为0.01%,0.07%,0.38%,0.67%,2.07%的GaSe∶Te晶体的光学性能进行了表征。首次研究了GaSe∶Te晶体中刚性层声子模式的转换。吸收光谱测试结果表明:当Te掺杂浓度小于0.38%时,振动中心位于0.59 THz附近的E'(2)刚性模式吸收峰强度可达最大值,这一过程与GaSe∶Te晶体光学性能的提高密切相关。但Te掺杂浓度的进一步提高会导致E'(2)刚性模式吸收峰强度逐渐减弱,当Te掺杂浓度为1%时,E'(2)刚性模式吸收峰基本消失。这两个过程与GaSe∶Te晶体光学质量的下降密切相关。因此,E'(2)刚性模式吸收强度达到最高时对应的掺杂浓度即是GaSe∶Te晶体中Te的最佳掺杂浓度,光整流产生太赫兹过程证实了此结论的正确性。 | 古新安 朱韦臻 罗志伟 ANDREEV Y M LANSKII G V SHAIDUKO A V IZAAK T I SVETLICHNYI V A VAYTULEVICH E A ZUEV V V | 2011 | 中国光学2011,4,6: | 3 |
| 13 | 间质p16表达有助于伴肌层浸润的子宫内膜样癌与非典型息肉样腺肌瘤的鉴别显示文摘非典型息肉样腺肌瘤是一种由非典型子宫内膜腺体和纤维肌样间质构成的息肉样病变,常与伴肌层浸润的子宫内膜样癌混淆。作者拟通过分析非典型息肉样腺肌瘤间质成分的免疫组化染色和分子组织学特征,以寻求独特标志物鉴别非典型息肉样腺肌瘤和伴肌层浸润的子宫内膜样癌。 | Kihara A Amano Y Yoshimoto T 王婷(摘译) 余英豪(审校) | 2020 | 临床与实验病理学杂志2020,36,5: | 3 |
| 14 | Quality of life, work productivity impairment and healthcare resources in inflammatory bowel diseases in Brazil显示文摘BACKGROUND Inflammatory bowel diseases(IBD)have been associated with a low quality of life(QoL)and a negative impact on work productivity compared to the general population.Information about disease control,patient-reported outcomes(PROs),treatment patterns and use of healthcare resources is relevant to optimizing IBD management.AIM To describe QoL and work productivity and activity impairment(WPAI),treatment patterns and use of healthcare resources among IBD patients in Brazil.METHODS A multicenter cross-sectional study included adult outpatients who were previously diagnosed with moderate to severe Crohn’s disease(CD)or ulcerative colitis(UC).At enrolment,active CD and UC were defined as having a Harvey Bradshaw Index≥8 or a CD Activity Index≥220 or calprotectin>200μg/g or previous colonoscopy results suggestive of inadequate control(per investigator criteria)and a 9-point partial Mayo score≥5,respectively.The PRO assessment included the QoL questionnaires SF-36 and EQ-5D-5L,the Inflammatory Bowel Disease Questionnaire(IBDQ),and the WPAI questionnaire.Information about healthcare resources and treatment during the previous 3 years was collected from medical records.Chi-square,Fisher’s exact and Student’s t-/Mann-Whitney U tests were used to compare PROs,treatment patterns and the use of healthcare resources by disease activity(α=0.05).RESULTS Of the 407 patients in this study(CD/UC:64.9%/35.1%,mean age 42.9/45.9 years,54.2%/56.6%female,38.3%/37.1%employed),44.7%/25.2%presented moderate-to-severe CD/UC activity,respectively,at baseline.Expressed in median values for CD/UC,respectively,the SF-36 physical component was 46.6/44.7 and the mental component was 45.2/44.2,the EQ-visual analog scale score was 80.0/70.0,and the IBDQ overall score was 164.0/165.0.Moderate to severe activity,female gender,being unemployed,a lower educational level and lower income were associated with lower QoL(P<0.05).Median work productivity impairment was 20%and 5%for CD and UC patients,respectively,and activity impairment was 30%,the latter being higher among patients with moderate to severe disease activity compared to patients with mild or no disease activity(75.0%vs 10.0%,P<0.001).For CD/UC patients,respectively,25.4%/2.8%had at least one surgery,38.3%/19.6%were hospitalized,and 70.7%/77.6%changed IBD treatment at least once during the last 3 years.The most common treatments at baseline were biologics(75.3%)and immunosuppressants(70.9%)for CD patients and 5-ASA compounds(77.5%)for UC patients.CONCLUSION Moderate to severe IBD activity,especially among CD patients,is associated with a substantial impact on QoL,work productivity impairment and an increased number of IBD surgeries and hospitalizations in Brazil. | Rogerio Serafim Parra Julio MF Chebli Heda MBS Amarante Cristina Flores Jose ML Parente Odery Ramos Milene Fernandes Jose JR Rocha Marley R Feitosa Omar Feres Antonio S Scotton Rodrigo B Nones Murilo M Lima Cyrla Zaltman Carolina D Goncalves Isabella M Guimaraes Genoile O Santana Ligia Y Sassaki Rogerio S Hossne Mauro Bafutto Roberto LK Junior Mikaell AG Faria Sender J Miszputen Tarcia NF Gomes Wilson R Catapani Anderson A Faria Stella CS Souza Rosana F Caratin Juliana T Senra Maria LA Ferrari | 2019 | World Journal of Gastroenterology2019,25,38: | 2 |
| 15 | Pyrolytic conversion of methyland vinylsilane polymers to Si-C ceramics 显示文摘 | HURWITZ F I KACIK T A BU X Y | 1995 | J Mater Sci1995,30,: | 2 |
| 16 | Effect of spinal cord preconditioning on paraplegia during cross-clamping of the thoracic aorta显示文摘 | Matsuyama K Chiba Y Ihaya A Kimura T Tanigawa N Muraoka R | 1997 | Ann Thorac Surg1997,63,5: | 2 |
| 17 | Interpreting well tests in fractured reservoir显示文摘 | BOURDET D AYOUB J A WHITTLR T M PIRARD Y M KNIAZEFF V | 1983 | World Oil1983,5,: | 2 |
| 18 | 左心室舒张功能的遗传性和其他影响因素:以家庭为基础的人口研究显示文摘确定遗传因素影响舒张功能多普勒指数的程度,是评估左心室舒张功能障碍与预后关系的一个重要因素。因此,研究人员从一般人群中选出家庭样本,对其家族左心室舒张特性和舒张功能集合评分的遗传度进行评估。方法:随机抽取316个家庭样本,包括452名父母和600名后代,平均年龄分别为58.5和33.3岁, | 刘莉 叶鹏 Kloch-Badelek M Knez J Tikhonoff V Thijs L Sakiewicz W Ryabikov A Stolarz-Skrzypek K Jin Y Malyutina S Casiglia E Narkiewicz K Czarnecka D Kawecka-Jaszcz K Staessen JA Kuznetsova T | 2014 | 中华高血压杂志2014,22,10: | 2 |
| 19 | A five phase reluctance motor with high specific torque 显示文摘 | Toliyat H A Xue L Y Lipo T A | 1992 | IEEE Transactions on Industry Applications1992,28,3: | 2 |
| 20 | Targeted Disruption of Cbfa1 Results in a Complete Lack of Bone Formation owing to Maturational Arrest of Osteoblasts显示文摘 | T Komori H Yagi S Nomura A Yamaguchi K Sasaki K Deguchi Y Shimizu R.T Bronson Y.-H Gao M Inada M Sato R Okamoto Y Kitamura S Yoshiki T Kishimoto | 1997 | Cell1997,,5: | 2 |