نتایج جستجو برای: barium oxide

تعداد نتایج: 184173  

2017
Uday Jammalamadaka Karthik Tappa Jeffery A Weisman James Connor Nicholson David K Mills

Halloysite nanotubes (HNTs) were investigated as a platform for tunable nanoparticle composition and enhanced opacity in poly(methyl methacrylate) (PMMA) bone cement. Halloysite has been widely used to increase the mechanical properties of various polymer matrices, in stark contrast to other fillers such as barium sulfate that provide opacity but also decrease mechanical strength. The present w...

2014
Jalal Vahedian-Ardakani Shahram Nazerani Amir Saraee Ali Sarmast Ehsan Saraee Mohammad Reza Keramati

A barium enema is a diagnostic and therapeutic procedure commonly used for colon and rectum problems. Rectal perforation with extensive intra- and/or extraperitoneal spillage of barium is a devastating complication of a barium enema that leads to a significant increase in patient mortality. Due to the low number of reported cases in recent scientific literature and the lack of experience with t...

2011
Nobutake Yamamichi Takeshi Shimamoto Chihiro Minatsuki Yoko Yoshida Mitsuhiro Fujishiro Shinya Kodashima Jun Kato Osamu Goto Satoshi Ono Keiko Niimi Yu Takahashi Maki Konno-Shimizu Masao Ichinose Kazuhiko Koike

BACKGROUND The aim of this study is evaluating the correlation of postprandial fullness with chronic gastritis or rapid inflow of gastric content into duodenum, based on double-contrast barium X-ray imaging. METHODS 253 healthy subjects who underwent upper gastrointestinal barium X-ray examination were analyzed. Chronic gastritis was judged from mucosal atrophy and hypertrophic thickened fold...

2014
M. Jackson N. Kapur V. Goyal K. Choo A. Sarikwal I. B. Masters Alan F. Isles

We describe a case of bilateral inhalation of barium in an infant following a barium swallow for investigation of dusky spells associated with feeds. A bronchoscopy subsequently revealed the presence of a mid-tracheal tracheo-esophageal cleft. To date, little has been reported on barium aspiration in children and there is no consensus for management. We review the literature on barium aspiratio...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده علوم پایه 1390

طراحی و سنتز پلیمر های کئوردینانسیونی متخلخل یا چارچوب های فلز- آلی به علت ساختارهای جالب این ترکیبات و قابلیت های کاربردی آنها برای ذخیره و جداسازی گاز، کاتالیز، تشخیص و جداسازی انانتیومرها، خواص مغناطیسی، تنظیم لومینسانس و غیره توجه زیادی را به خود جلب کرده است. اخیرا مشخص شده است که برخی لیگاندهای آلی مسطح صلب مثل ایمیدازول-5،4-دی کربوکسیلیک اسید (h3idc) برای تشکیل چارچوب های فلز- آلی مناسب ...

Journal: :Annals of the Academy of Medicine, Singapore 2006
Ching Yin Neoh Audrey W H Tan Yung Hian Leow

INTRODUCTION Few reports have documented allergic hypersensitivity reactions after barium gastrointestinal studies. Of these, the barium suspension, its additives or intravenous glucagon given for bowel relaxation has been implicated as possible allergens. We report a patient with delayed hypersensitivity reaction after barium enema and discuss the reasons supporting glucagon as the possible al...

2015
Surinder Paul Devinder Kumar

Barium titanate is a member of a large family of compounds with the general formula ABO3 called perovskites, as the crystal size of barium titanate increases and at critical crystalline size crystal structure of barium titanate transformed from cubic to tetragonal. Transformation of crystal structure is also take place at Curi temperature. Cubic structure show paramagenatic behavior while tetra...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی اصفهان - دانشکده فیزیک 1386

پیل سوختی یک وسیله الکتروشیمیایی است که به طور مستقیم انرژی شیمیایی را به انرژی الکتریکی تبدیل می کند. هر پیل سوختی شامل سه جزء اصلی است کاتد، الکترولیت و آند، سوخت از سمت آند و اکسید کننده از سمت کاتد وارد می شوند. یک پیل سوختی تا زمانی که سوخت واکسید کننده مورد استفاده در آن تأمین شود به طور پیوسته کار می کند. اکسید کننده در پیل سوختی، اکسیژن است. سوخت در آند، الکترون از دست می دهد و به یون ت...

2015
Chao Yang Yudong Xia Yan Xue Fei Zhang Bowan Tao Jie Xiong

We report a detailed study of the grain orientations and grain boundary (GB) networks in Y2O3 films grown on Ni-5 at.%W substrates. Electron back scatter diffraction (EBSD) exhibited different GB misorientation angle distributions, strongly decided by Y2O3 films with different textures. The subsequent yttria-stabilized zirconia (YSZ) barrier and CeO2 cap layer were deposited on Y2O3 layers by r...

2012
D. C. van der Laan P. N. Barnes

The role of grains and grain boundaries in producing reversible strain effects on the transport current critical current density (Jc) of YBa2Cu3O7−δ (YBCO) coated conductors that are produced with metal–organic deposition (MOD) was investigated. The strain (ε) dependence of Jc for full-width coated conductors is compared with that for samples in which the current transport was limited to a few ...

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