نتایج جستجو برای: نانو پودر ceo2

تعداد نتایج: 21591  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز - دانشکده مهندسی مکانیک 1390

هگزافریت باریم با فرمول شیمیایی bafe12o19 ، یکی از شناخته شده ترین مواد مغناطیسی دائم در گروه فریتها است. استفاده از آن به عنوان آهنرباهای دائم، سیستم های ویژه ذخیره اطلاعات، کاربردهای فرکانس بالای امواج الکترومغناطیس، پوششهای رادار گریز در صنایع دفاعی، سیال های مغناطیسی، کاربردهای پزشکی دارویی، دستگاههای تصویر برداری رزونانس مغناطیسی و غیره تنها بخشی از کاربردهای امروزی این مواد هستند. کسب خوا...

Journal: :Cellular physiology and biochemistry : international journal of experimental cellular physiology, biochemistry, and pharmacology 2017
Nandini D P K Manne Ravikumar Arvapalli Vincent A Graffeo Venkata V K Bandarupalli Tolou Shokuhfar Sweetu Patel Kevin M Rice Gautam Kumar Ginjupalli Eric R Blough

BACKGROUND Hepatic ischemia reperfusion is one the main causes for graft failure following transplantation. Although, the molecular events that lead to hepatic failure following ischemia reperfusion (IR) are diverse and complex, previous studies have shown that excessive formation of reactive oxygen species (ROS) are responsible for hepatic IR injury. Cerium oxide (CeO2) nanoparticles have been...

2014
K Suresh Babu M Anandkumar TY Tsai TH Kao B Stephen Inbaraj BH Chen

BACKGROUND Cerium oxide nanoparticles (CeO2) have been shown to be a novel therapeutic in many biomedical applications. Gold (Au) nanoparticles have also attracted widespread interest due to their chemical stability and unique optical properties. Thus, decorating Au on CeO2 nanoparticles would have potential for exploitation in the biomedical field. METHODS In the present work, CeO2 nanoparti...

ژورنال: مواد نوین 2013
احمد ساعتچی, مجتبی نصر اصفهانی, ویدا تقی زاده توفیقی

در این پژوهش نانو پودر شیشه سرامیک زیست فعال با ترکیب شیمیایی55%SiO2 ، 40%CaOو5%P2O5 (درصد مولی) به روش سل ژل تهیه و مشخصه یابی شد. در این روش ابتدا مواد اولیه سیلیس و کلسیم دار در محیط اسیدی هیدرولیز سپس در محیط بازی به صورت ژل در آمدند. نتایج آنالیز پراش اشعه ایکس و آنالیز طیف سنجی مادون قرمز نشان داد که این پودر شیشه سرامیک با فاز بلوری هیدروکسی آپاتیت است. از میکروسکوپ الکترونی روبشی میدان ...

2015
Acácio Nobre Mendes Maria Filipa Ribeiro Carlos Henriques Patrick Da Costa

In the present work, the effect of several parameters involved in the preparation of PdCe-HMOR catalysts active for NOx selective catalytic reduction with methane (NOx CH4-SCR) was studied. Results show that the catalytic performance of Pd-HMOR is better when palladium is introduced by ion-exchange, namely at room temperature. It was also shown that Pd loading does not influence the formation o...

Journal: :Physical chemistry chemical physics : PCCP 2016
Xiao-Dan Yao Kong-Jie Zhu Bo-Tao Teng Cao-Ming Yu Yun-Lei Zhang Ya Liu Maohong Fan Xiao-Dong Wen

The effects of strong interactions between Ti and ceria on the structures of Ti/CeO2(111) are systematically investigated by density functional theory calculation. To our best knowledge, the adsorption energy of a Ti atom at the hollow site of CeO2 is the highest value (-7.99 eV) reported in the literature compared with those of Au (-0.88--1.26 eV), Ag (-1.42 eV), Cu (-2.69 eV), Pd (-1.75 eV), ...

2009
T. Caroff A. Bartasyte S. Margueron A. Abrutis O. Chaix

CeO2/La2Zr2O7/Ni piled-up structure is a very promising architecture for YBa2Cu3O7 (YBCO) coated conductors. We have grown YBCO/CeO2/ LZO/Ni epitaxial structures by metalorganic decomposition (MOD) and metalorganic chemical vapour deposition (MOCVD) methods. The crystallographic quality of the CeO2 layer is not well determined by conventional X-Ray Diffraction (XRD) due to the superposition of ...

Journal: :Nanomedicine : nanotechnology, biology, and medicine 2013
Adam Briggs Stéphanie Corde Sianne Oktaria Ryan Brown Anatoly Rosenfeld Michael Lerch Konstantin Konstantinov Moeava Tehei

UNLABELLED This article pioneers a study into the influence of the high-Z component of nanoparticles on the efficacy of radioprotection some nanoparticles offer to exposed cells irradiated with X-rays. We reveal a significant decrease in the radioprotection efficacy for cells exposed to CeO2 nanoparticles and irradiated with 10 MV and 150 kVp X-rays. In addition, analysis of the 150 kVp surviva...

2016
Joydeep Das Jae Woong Han Yun-Jung Choi Hyuk Song Ssang-Goo Cho Chankyu Park Han Geuk Seo Jin-Hoi Kim

Gene therapy is a promising technique for the treatment of various diseases. The development of minimally toxic and highly efficient non-viral gene delivery vectors is the most challenging undertaking in the field of gene therapy. Here, we developed dimethyldioctadecylammonium bromide (DODAB)-nanoceria (CeO2) hybrids as a new class of non-viral gene delivery vectors. These DODAB-modified CeO2 n...

2014
S. Munusamy K. Bhakyaraj L. Vijayalakshmi A. Stephen V. Narayanan

In the present work, we have investigated synthesis of cerium oxide nanoparticles (CeO2 NPs) using Curvularia lunata culture filtrate. The synthesized CeO2 NPs were characterized by TG/DTA, XRD, Raman, PL, FTIR, UV-visible spectroscopy and TEM analyses. The synthesized nanoparticles retained the cubic structure, which was confirmed by X-ray diffraction studies. UV-visible spectrum exhibited a w...

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