نتایج جستجو برای: SEVA/HAP Composite

تعداد نتایج: 121604  

پایان نامه :وزارت علوم، تحقیقات و فناوری - پژوهشگاه مواد و انرژی - پژوهشکده سرامیک 1392

thermal barrier coatings (tbcs) are used to provide thermal insulation to the hot section components of gas turbines in order to enhance the operating temperature and turbine efficiency. hot corrosion and thermal shocks are the main destructive factors in tbcs which comes as a result of oxygen and molten salt diffusion into the coating. in this thesis atmospheric plasma spraying was used to dep...

2014
Axel Rahmel

Vascularized composite allotransplantation is a continuously evolving area of modern transplant medicine. Recently, vascularized composite allografts (VCAs) have been formally classified as 'organs'. In this review, key aspects of VCA procurement are discussed, with a special focus on interaction with the procurement of classical solid organs. In addition, options for a matching and allocation ...

Journal: :تحقیق در علوم دندانپزشکی 0
نگین نصوحی negin nasoohi assistant prof, department of operative dentistry, islamic azad university, dental branch, tehran,iranتهران پاسداران نیستان دهم پلاک4 دانشکده دندانپزشکی بخش ترمیمی تلفن : 09125392175 مریم حوریزاد maryam hoorizad branch, tehran,iranاستادیار گروه آموزشی دندانپزشکی ترمیمی دانشگاه آزاد اسلامی واحد دندانپزشکی تهران نازنین ترابزاده طاری nazanin torabzade tari

nasoohi n 1 hoorizad m1 torabzadeh tari n 2   1- assistant prof, department of operative dentistry, islamic azad university, dental branch, tehran,iran   2-dentist   corresponding author : nasoohi n: department, no 4, 10th neyestan ave, pasdaran, tehran   tel : 09125392175 email: [email protected]     background and aim: discoloration of dental composites is one of the major reasons of the...

Journal: :international journal of advanced design and manufacturing technology 0
abbas vafaeisefat mohammad tafazoli harandi

composite pressure vessel cng made of epoxy – carbon material with nonmetal liner is 60% lighter than aluminum vessel under the same conditions. one of the important parameters in the pressure vessels design is their resistance against impact and prevention of explosion. in this paper, the effects of low velocity impact on composite pressure vessel are investigated using fe analysis. the vessel...

Journal: :iranian journal of pharmaceutical sciences 0
sepideh banava dental faculty, tehran azad dental school, tehran , iran saman salehyar dental faculty, tehran azad dental school, tehran , iran

to evaluate the ultimate compressive strength of five composite resins after 1 hour, 24 hours, 7 days and 1 month. twenty four cylindrical 4 mm×8mm specimens of each commonly used composite resins in posterior region (nulite-f , z250 , p60, biscore, tetric ceram hb) were prepared. each group of composite resins were divided into four time groups of 1 h, 24 h, 7 days and 1 month. all of specimen...

Journal: :journal of dental materials and techniques 0
horieh moosavi dental materials research center, department of restorative dentistry, faculty of dentistry, mashhad university of medical sciences, mashhad, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی مشهد (mashhad university of medical sciences) elham afshari undergraduate student of dentistry, faculty of dentistry, mashhad university of medical sciences, mashhad, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی مشهد (mashhad university of medical sciences) maryam forghani dental research center, department of endodontics, faculty of dentistry, mashhad university of medical sciences, mashhad, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی مشهد (mashhad university of medical sciences) kiarash ghazvini microbiology and virology research center, ghaem hospital, faculty of medicine, mashhad university of medical sciences, mashhad, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی مشهد (mashhad university of medical sciences) fatemeh velayati 1 dental materials research center, department of restorative dentistry, faculty of dentistry, mashhad university of medical sciences, mashhad, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی مشهد (mashhad university of medical sciences)

introduction: although composite resins have improved greatly since their introduction, microleakage is one of the most frequently encountered problems. this study compared the effects of different monomer systems and layering techniques on the bacterial leakage of cl i composite resin restorations. methods: eighty-two sound human third molars were used. the teeth were randomly divided into six...

2013
Karim A. Sarhane Sami H. Tuffaha Justin M. Broyles Amir E. Ibrahim Saami Khalifian Pablo Baltodano Gabriel F. Santiago Mohammed Alrakan Zuhaib Ibrahim

Advances in microsurgical techniques and immunomodulatory protocols have contributed to the expansion of vascularized composite allotransplantation (VCA) with very encouraging immunological, functional, and cosmetic results. Rejection remains however a major hurdle that portends serious threats to recipients. Rejection features in VCA have been described in a number of studies, and an internati...

Journal: :journal of dentistry, tehran university of medical sciences 0
narmin mohammadi mahmoud bahari dental and periodontal research center, dental faculty, medical sciences university of tabriz, iran soodabeh kimyai behnam rahbani nobar

objectives: composite repair is a minimally invasive and conservative approach. this study aimed to evaluate the effect of an additional hydrophobic resin layer on the repair shear bond strength of a silorane-based composite repaired with silorane or methacrylate-based composite. materials and methods: sixty bar-shaped composite blocks were fabricated and stored in saline for 72 hours. the surf...

Journal: :journal of dental biomaterials 0
zahra deljoo shiraz dental school, shiraz university of medical sciences, shiraz, iran maryam sadeghi shiraz dental school, shiraz university of medical sciences, shiraz, iran mohammad reza azar department of endodontics and prevention of oral and dental disease research center, school of dentistry, shiraz university of medical sciences, shiraz, iran rafat bagheri department of dental materials and biomaterials research centre, school of dentistry, shiraz university of medical sciences, shiraz, iran

statement of problem: accumulation of plaque and staining due to a rough surface,  and  penetration  of  colourant  agents  from  food  and  beverages  in to the resin composite results in an incomplete polymerization. there is a little information on the effect of finishing and polishing techniques on the discoloration of nanohybrid and microhybrid composites when exposed to staining solutions...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی اصفهان - دانشکده عمران 1388

در سال های اخیر، تقاضای استفاده از تئوری خطی ویسکوالاستیسیته بیشتر شده است. با افزایش استفاده از کامپوزیت های پیشرفته در صنایع هوایی و همچنین استفاده روزافزون از مواد پلیمری، اهمیت روش های دقیق طراحی و تحلیل چنین ساختارهایی بیشتر شده است. این مواد جدید از خودشان رفتارهای مکانیکی ارائه می دهند که با تئوری های الاستیسیته و ویسکوزیته، نمی توان آن ها را توصیف کرد. این مواد، خواص ویسکوالاستیک دارند....

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