نتایج جستجو برای: natural polymer

تعداد نتایج: 571119  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی امیرکبیر(پلی تکنیک تهران) - دانشکده مهندسی نساجی 1386

از پلیمر طبیعی کیتوسان جهت افزایش وزن نخ ابریشم ایرانی استفاده شد، به دلیل عدم پیوند مستقیم گروه های عاملی کیتوسان بر روی نخ ابریشم، پس از صمغ گیری، ابریشم ابتدا با انیدرید عمل گردیده و با قرار گرفتن گروه های فعال کربوکسیل ب روی آن امکان گرافت نخ ابریشم با پلیمر کیتوسان به وجود آمد. اثر حلال انیدرید، سوکسینیک انیدرید و فتالیک انیدرید و در دو حلال دی متیل سولفوکسید (dmso)، و دی متیل فرمامید (dmf...

Journal: :یافته های تحقیقاتی در گیاهان زراعی و باغی 0
علیرضا توکلی مرکز تحقیقات کشاورزی و منابع طبیعی استان سمنان، شاهرود

in order to investigate the effects of super absorbent material on water saving and increasing rain water productivity under micro catchments water harvesting systems, a field experiment was conducted in east azarbaijan. the treatments included two mcwh patterns (small basins and semi-circular bunds), three catchments sizes, three runoff area treatments (natural, cleared and smoothed, wetting a...

Journal: :Journal of Japan Oil Chemists' Society 1986

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان 1390

during natural gas processing, water in natural gas may cause to hydrates formation in pipelines which may lead to serious damages to process equipments. given the problems raised by present of water in natural gas, glycol solvent uses to remove water.in contact of glycol with gas always an amount of btex and voc absorb along with water, which on glycol recovery process, these substances separa...

2013
H Megat Ahmad

Characteristically, polymers consist of the long chain molecules constructed of atoms (such as carbon and hydrogen) in the various arrangements with the different elements in the forming of basic building block of a polymer chain. Besides its primacy to the safety and environmental issues, polymer is becoming more widely used in today's industrial products due to its inherent advantages, such a...

2012
J. Sahari S. M. Sapuan

Currently, numerous research groups have explored the production and properties of biocomposites where the polymer matrices are derived from renewable resources such as poly lactide (PLA), thermoplastic starch (TPS), cellulose and polyhydroxyalkanoates (PHAs). This review is carried out to evaluate the development and properties of natural fibre reinforced biodegradable polymer composites. They...

A wide range of materials and scaffolding fabrication methods for bone tissue engineering have beenexplored recently. Fiber reinforced polymers (FRP) system appears to be a suitable system. By the exclusiveuse of biocompatible or bio-absorbable polymers and fibers, novel generation of scaffolds for applicationsin tissue engineering can be prepared. Mulberry Silk as highlighted...

Journal: :World Journal of Biology Pharmacy and Health Sciences 2022

Microspheres having free flowing powder characteristics, which are consisting of synthetic polymers and proteins. These biodegradable in nature particle size less than 200um. the multiparticulate drug delivery systems from natural material. received much attention not only for prolonged release, but also targeting anticancer drugs. In future by combining various other strategies, microspheres w...

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