检索结果-南通市图书馆

Evidence for structural phase transitions and large effective band gaps in quasi-metallic ultra-clean suspended carbon nanotubes

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2013年第10期6卷 736-744页

作者： shun-Wen Chang Rohan Dhall Moh Amer Kentaro sato Riichiro Saito Stephen Cronin Department of Physics and Astronomy University of Southern California Los Angeles CA 90089 USA Department of Electrical Engineering University of Southern California Los Angeles CA 90089 USA Department of Chemistry University of Southern California Los Angeles CA 90089 USA Department of Physics Tohoku University Sendai 980-8578 Japan

我们由在静电的门潜力下面检验他们的拉曼系列和电子运输在单个推迟的金属性的碳 nanotubes 为结构的阶段转变报导证据。当前门的电压特征象 240 兆电子伏一样高揭示反常地大的伪金属性的乐队差距，最大迄今为止报导了。为有比 200 兆... 详细信息

我们由在静电的门潜力下面检验他们的拉曼系列和电子运输在单个推迟的金属性的碳 nanotubes 为结构的阶段转变报导证据。当前门的电压特征象 240 兆电子伏一样高揭示反常地大的伪金属性的乐队差距，最大迄今为止报导了。为有比 200 兆电子伏大的乐队差距的 nanotubes，我们在 2D 乐队的门依赖观察显著 M 形状侧面(或 G 乐队) 拉曼频率。显著剧降(或弄软) 零扇门附近的声子模式，电压能被归因于发生在费用中性点(CNP ) 的结构的阶段转变(SPT ) 。2D 乐队拉曼紧张也在 CNP 附近突然地变化，在格子对称和可能的 SPT 换换花样提供进一步的证据。然而，显著非断热的效果在 G 乐队拉曼模式的门依赖被观察这行为在 CNP 附近从非断热的理论背离。为有比 200 兆电子伏大的乐队差距的 nanotubes，非断热的效果应该大部分被压制，它没试验性地被观察。这个数据建议这些大有效乐队差距被 SPT 首先引起到一个绝缘的状态，它引起在 CNP 附近在传导力观察的大调整。为这 SPT 的可能的机制被讨论，包括电子电子(例如，莫特) 并且电子声子(例如， Peierls ) 驾驶转变。

关键词：有效带隙碳纳米管结构相变金属性证据悬浮非绝热效应拉曼光谱

An Observational Study on the Clinical and Nutritional Factors Determining the Kidney Function at One Year after Transplantation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Food and Nutrition Sciences 2018年第11期9卷 1299-1315页

作者： Nao Kawabata Toshiko sato Koji Nanmoku Daisuke Nagata Shizukiyo Ishikawa shun Ishibashi Takashi Yagisawa Yoshio Uehara Department of Clinical Nutrition Jichi Medical University Hospital Shimotsuke Tochigi Japan Graduate School of Home Economics Kyoritsu Women’s University Tokyo Japan Division of Renal Surgery and Transplantation Department of Urology Jichi Medical University Shimotsuke Tochigi Japan Division of Nephrology Department of Internal Medicine Jichi Medical University Shimotsuke Tochigi Japan Medical Education Center Jichi Medical University Shimotsuke Tochigi Japan Division of Endocrinology and Metabolism Department of Internal Medicine Jichi Medical University Shimotsuke Tochigi Japan

Objective: The aim of the present study was to investigate the clinical and nutritional factors influencing the renal function of the transplanted kidney during a one-year follow-up period after transplantation. Patients: The present prospective observational study included 52 patients who underwent kidney transplantation at Jichi Medical University Hospital from 2014 to 2016. Results: The serum creatinine (sCr) concentration at one month after transplantation was closely related to the concentration at 12 months. The recipients were divided into two groups based on the sCr concentration at one month after transplantation. Recipients with a sCr concentration greater than or equal to the median were classified into Group H, while those with concentrations that were less than the median were classified into Group L. A stepwise multiple regression analysis demonstrated that the salt intake in male recipients was an independent predictor of the renal function at 12 months (β = 0.663, p β = 0.618, p < 0.01). Moreover, in female recipients, the BMI and serum uric acid values in Group H were significantly higher than those in Group L. The BMI values of the female recipients in Group H were significantly higher than those in Group L at all times during the follow-up period (p < 0.01). Conclusion: The daily salt intake was independently associated with the renal function at one year after kidney transplantation in male recipients. In female recipients, the BMI was independently associated with the sCr concentration during the one-year follow-up period.

关键词： Salt Obesity Uric Acid Serum Creatinine Kidney Function

Successful endoscopic fragmentation of large hardened fecaloma using jumbo forceps

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal Endoscopy 2017年第2期9卷 91-94页

作者： Yasumasa Matsuo Hiroshi Yasuda Hiroyasu Nakano Miki Hattori Midori Ozawa Yoshinori sato Yoshiko Ikeda shun-Ichiro Ozawa Masaki Yamashita Hiroyuki Yamamoto Fumio Itoh Division of Gastroenterology and Hepatology Department of Internal MedicineSt.Marianna University School of MedicineKanagawa 216-8511Japan

We present a rare case of fecaloma, 7 cm in size, in the setting of systemic scleroderma. A colonoscopy revealed a giant brown fecaloma occupying the lumen of the colon and a colonic ulcer that was caused by the fecaloma. The surface of the fecaloma was hard, large and slippery, and fragmentation was not possible despite the use of various devices, including standard biopsy forceps, an injection needle, and a snare. However, jumbo forceps were able to shave the surface of the fecaloma and break it successfully by repeated biting for 6 h over 2 d. The ability of the jumbo forceps to collect large mucosal samples was also appropriate for achieving fragmentation of the giant fecaloma.

关键词： Fecaloma 巨大的活体检视钳全身的硬皮病混合结缔组织疾病

Efficient Solvent- and Catalyst-Free Syntheses of Imine Derivatives Applying the Pressure Reduction Technique: Remarkable Change of the Reaction Rate with the Phase Transition

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Green and Sustainable Chemistry 2018年第2期8卷 167-179页

作者： Shoko Suzuki Shujiro Sakaki Shinji Ishizuka Tomomichi Nishino Hiroyuki Ito Risehiro Nonaka Motoyoshi Noike Takeshi Kodama Hajime Nozaka Tsuneyuki sato Hitoshi Agematsu Koichi Maruyama shun Oyamada Takashi Kuroishi Kazuma Sasaki Kei Yagawa Mami Yoshioka Yasuo Yokoyama Faculty of Education Kyoto University of Education Kyoto Japan Department of Chemical and Biological Engineering National Institute of Technology Akita College Akita Japan Environment Systems Engineering Course National Institute of Technology Akita College Akita Japan Department of Applied Chemistry National Institute of Technology Akita College Akita Japan

Because imines could be used as convenient starting materials in various fields, the development of an easy synthetic method of imine was strongly desired. In response to this demand, we thought that it would be an effective synthesis method if an aldehyde and an amine could be reacted to give an imine in good yield under solvent- and catalyst-free conditions. In fact, we tried the reaction of benzaldehyde with various amines under solvent- and catalyst-free conditions followed by removal of water that was produced in the reaction system by a vacuum pump, and desired imines could be obtained in good yields. Observation of this reaction using a nuclear magnetic resonance spectrometer revealed that the reaction rate was extremely fast at the initial stage but slowed over time. However, the reaction of benzaldehyde with aniline differed greatly, and the reaction rate dramatically improved in 47 - 48 minutes after the start of the reaction. At this time, we found that the reaction system underwent a phase transition from the liquid phase to the solid phase.

关键词： Solvent-Free Catalyst-Free Pressure Reduction Technique Imine Reaction Rate Phase Transition

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

规则波作用下淤泥质泥沙起动试验研究

水运工程 2019年第8期 20-26页

作者：邵杰张芝永董伟良黄世昌汪求顺浙江省水利河口研究院浙江省河口海岸重点实验室

选取浙江舟山近岸淤泥质泥沙为研究对象,采用规则波对淤泥质泥沙的起动进行水槽试验研究。结果表明,淤泥质泥沙具有薄层轻微悬扬、表层个体剥离、泥团卷起悬扬3种典型的起动状态,同一水深下的泥沙起动波高随波周期的增大而递减。以泥团... 详细信息

选取浙江舟山近岸淤泥质泥沙为研究对象,采用规则波对淤泥质泥沙的起动进行水槽试验研究。结果表明,淤泥质泥沙具有薄层轻微悬扬、表层个体剥离、泥团卷起悬扬3种典型的起动状态,同一水深下的泥沙起动波高随波周期的增大而递减。以泥团卷起悬扬状态作为判断淤泥质泥沙起动的标准,佐藤公式、窦国仁公式计算的起动波高均与本文试验值总体上接近,可将两家公式计算结果的平均值用于淤泥质泥沙起动波高的估算。泥团卷起悬扬状态下过程最大含沙量往往在0.8~2.0kgm3,过程最大含沙量随临界切应力增大而呈现明显的指数递增关系。研究成果便于深入了解淤泥质海岸地区泥沙在波浪环境下的水力特性,同时可为海岸泥沙数模计算及工程分析的参数选取提供参考。

关键词：规则波淤泥质泥沙起动试验研究