نتایج جستجو برای: mechanical properties enhancement

تعداد نتایج: 1142716  

2014
Neil R. Anthony Keith M. Berland

Fluorescence fluctuation methods have become invaluable research tools for characterizing the molecular-level physical and chemical properties of complex systems, such as molecular concentrations, dynamics, and the stoichiometry of molecular interactions. However, information recovery via curve fitting analysis of fluctuation data is complicated by limited resolution and challenges associated w...

حسین ادریس, , علی دوست محمدی, , فاطمه سادات سیدان, , فرزانه شیرانی, , محمدحسین فتحی, , وجیه السادات مرتضوی, ,

The objective of this study was to synthesize glass ionomer–forsterite nanocomposite and study the effect of incorporating forsterite nanoparticles to the ceramic part of glass ionomer cement in order to improve mechanical properties and bioactivity. So, Forsterite nanoparticles were made by the sol-gel process using different weight percentages added to the ceramic part of commercial GIC (F...

Journal: :تحقیقات مهندسی کشاورزی 0
معصومه علی بابا دانشجوی کارشناسی ارشد احمد غضنفری مقدم دانشیار گروه مکانیک ماشین های کشاورزی دانشگاه شهید باهنر کرمان علی رجبی پور دانشیار گروه مهندسی و فناوری دانشکده پردیس کشاورزی و منابع طبیعی دانشگاه تهران

after harvesting, pistachio nuts are generally kept in storage before being exported. during handling, thenuts are exposed to external forces that cause mechanical damage to them. the increase of the mechanicaldamage is a function of storage conditions, especially temperature. this research investigated the effect ofstorage temperature (25, 5, -5, -15°c), on the mechanical properties of pistach...

Journal: :علوم و تکنولوژی پلیمر 0
حامد غفارزاده زارع احمد غضنفری مقدم حسن هاشمی پور رفسنجانی

during the past two decades the use of lignocellouse fibers in reinforcing composites has attracted much research activities. in the present work, date palm fiber was used for production of composites compatible withliving environment. the fibers were pre-treated chemically to remove impurities. in order to verify and compare the effectiveness of the pretreatment methods, lignin, ash, moisture ...

The effects of rare earth addition and hot extrusion process on the grain refinement of magnesium alloy were studied. The as-cast Mg-6Al-1Zn (AZ61) alloy had the average grain size of ~ 64 µm and its microstructure consisted of α-Mg and Mg17Al12 phase. By partial substitution of Al with Gd to reach Mg-4.8Gd-1.2Al-1Zn alloy, it was observed that the Mg17Al12 phase disappeared and two new interme...

ژورنال: مواد پرانرژی 2015

In order to increasing of hydroxy functionality of HTPB, an in-situ nitroxide mediated polymerization (NMP) of 1,3-butadiene was carried out in presence of TEPA as a polyfunctional nitroxide precursor. The effects of this new hydroxyl-terminated polybutadiene on thermal and dynamic-mechanical properties of its corresponding polyurethane elastomer were studied by DSC and DMTA tests. A ...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2015
ykhlef laidani salah hanini ghania henini gerard mortha

this study was devoted to the development of pulp luffa cclindrica and its characterization paper (annual plant fiber of the family cucurbitaceae). baking at soda helps to achieve a high level of delignification (kappa ≤ 10) and high yield (≈ 67%).the beatability stack valley is comparable to refined wood fibers, the fibers develop a normally time with good hydrophilic properties without excess...

Journal: :IOP Conference Series: Materials Science and Engineering 2017

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