نتایج جستجو برای: cellulose nanoparticle
تعداد نتایج: 60766 فیلتر نتایج به سال:
New bionanocomposite proton exchange membranes were prepared from sulfonated polybenzimidazole (s-PBI) and various amounts of sulfonated ZnO/cellulose nanohybrids (ZnO/cellulose-SO3H). The use of ZnO/cellulose-SO3H compensates for the decrease in ion exchange capacity of membranes observed when non-sulfonated nano-fillers are utilized. The strong –SO3H/–SO<su...
در تحقیق حاضر باتوجه به مزایای نانو کاتالیست ها به ویژه نانوکاتالیست های مغناطیسی، ترکیبات فتالازینی با استفاده از تراکم چهارجزئی بین آلدهید، دایمدون، فتالیک انیدرید و هیدرازین در شرایط بدون حلال، با بهره بالا و زمان واکنش کم در حضور نانوکاتالیست مغناطیسی بر پایه سلولز به عنوان یک پلیمر زیست تخریب پذیر (cellulose@fe2o3-so3h) سنتز شدند. در ادامه نانوکامپوزیت مغناطیسی سولفونه شده به عنوان کاتالی...
The amalgamation of polymer and pharmaceutical sciences led to the introduction of polymer in the design and development of drug delivery systems. Polymeric delivery systems are mainly intended to achieve controlled or sustained drug delivery. Polysaccharides fabricated into hydrophilic matrices remain popular biomaterials for controlled-release dosage forms and the most abundant naturally occu...
Shape-persistent and tough cellulose hydrogels were fabricated by a stepwise solvent exchange from a homogeneous ionic liquid solution of cellulose exposure to methanol vapor. The cellulose hydrogels maintain their shapes under changing temperature, pH, and solvents. The micrometer-scale patterns on the mold were precisely transferred onto the surface of cellulose hydrogels. We also succeeded i...
The interaction between cellulase enzymes and their substrates is of central importance to several technological and scientific challenges. Here we report that the binding of cellulose binding modules (CBM) from Trichoderma reesei cellulases Cel6A and Cel7A show a major difference in how they interact with substrates originating from wood compared to bacterial cellulose. We found that the CBM f...
Among animals, urochordates (e.g., ascidians) are unique in their ability to biosynthesize cellulose. In ascidians cellulose is synthesized in the epidermis and incorporated into a protective coat know as the tunic. A putative cellulose synthase-like gene was first identified in the genome sequences of the ascidian Ciona intestinalis. We describe here a cellulose synthase gene from the ascidian...
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