نتایج جستجو برای: engineering properties
تعداد نتایج: 1105126 فیلتر نتایج به سال:
this paper reviews some progressive studies and innovations in cement and concrete materials in nano field. due to the widespread acceptance of the special properties of nano materials and using them for engineering concrete performance, understanding and directing their properties are not achievable without instructing concepts and investigating interactions among components. due to achievemen...
In recent years the use of nanomaterials in bone tissue engineering scaffold has been considered due to its imitating the structure of natural bone tissue which contains a nanocomposite structure mixed with a three-dimensional matrix. In the meantime, Polycaprol actone has been used as a bio-polymer in bone tissue engineering applications as a scaffold. The aim of this study is to develop porou...
Recently, it has been proven that cartilage healing is difficult. The most commonly used treatments are autogenously cartilage grafting and allogeneic bone grafting, but grafts cannot fully meet treatment goals because of source, price, safety, and other concerns. Thus, a combination of biological materials and tissue engineering technology has become a recent trend in studies. Among the studie...
Fiber-reinforced laminated composites are frequently preferred in many engineering projects. With the development in production technology, the using of the fiber reinforced laminated composites has been increasing in engineering applications. In the production stage of the fiber-reinforced laminated composites, porosities could be occurred due to production or technical errors. After a level o...
Tissue engineering is defined as the designing and engineering of structures to rebuild and repair a body damaged tissue. Scaffolding Poly Hydroxy Butyrate Valraty (PHBV) has shown good biocompatibility and biodegradable properties. Nanofibers have improved the performance of biomaterials, and could be considered effective. One of the important methods for designing nanofiber scaffold is the el...
semiconducting carbon nanofibers (cnf) are prepared from three different sources, i.e., acetylene, ethanol, and cotton by the chemical vapor deposition (cvd) process. these fibers are having rich elastic, engineering and conductivity properties. fresh self-compacting concrete (scc) flows into place and around obstructions under its own weight to fill the formwork completely and self-compact, wi...
قیرهای استحصالی از نفت و یا قیر طبیعی که سالیان دراز عمدتاً بعنوان ماده چسباننده در ساخت جاده ها و با دیگر مصارف عایق-کاری و پوششی بکار می رود، هیچگاه از یکسری خواص فیزیکی و مکانیکی کاملاً رضایت بخش برخوردار نبوده و با توجه به خواص فیزیکی محدود، از قابلیت کاربردی محدود و زمان سرویس دهی مشخص برخوردار می باشد. از این رو محققان همواره تلاش داشتند که بنحوی خواص این سنگین ترین برش نفتی را در جهت مطلوب...
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