نتایج جستجو برای: poly(vinyl alcohol)

تعداد نتایج: 121649  

Journal: :علوم و تکنولوژی پلیمر 0
مرتضی حاجیان مهدی راستگو

polyvinyl butyral (pvb) was synthesized by condensation reaction of polyvinyl alcohol (pva) with butanal in aqueous medium containing an effective emulsifier and an inorganic acid as catalyst. the product was characterized by, ir, tg and dtg techniques. percentage of vinyl alcohol groups in the pvb was determined by a chemical method according to a standard method. some clear and soft film samp...

ژورنال: طب جنوب 2019
Azin , Reza, Najafiasl , Maryam, Osfouri , Shahriyar, Zaeri , Sasan,

Background: Nowadays, in order to preserve the environment and sustainable development, the use of natural and renewable resources is a priority for industries. High performance and specific structure of nano-biocompatible materials has attracted researchers. In this research, alginate polymer, which is generally obtained from marine sources such as algae, was added to polyvinyl alcohol nanofi...

2014
Chia-Chang Lin Li-Ting Lee Ling-Jung Hsu

This investigation evaluates the effectiveness of UV-365 nm/S2O8 2process in degrading polyvinyl alcohol in aqueous solutions. The effects of pH, Na2S2O8 dosage, and temperature on the degradation efficiency of polyvinyl alcohol were studied. Under acidic conditions, the degradation efficiency of polyvinyl alcohol exceeded that under alkaline conditions. Additionally, a higher Na2S2O8 dosage an...

Journal: :jundishapur journal of microbiology 0
parisa ebrahimisadr department of parasitology, school of medical sciences, tarbiat modares university, tehran, ir iran fatemeh ghaffarifar department of parasitology, school of medical sciences, tarbiat modares university, tehran, ir iran; department of parasitology, school of medical sciences, tarbiat modares university, tehran, ir iran. tel: +98-2182884553, fax: +98-2182884555 zuhir mohammad hassan department of immunology, school of medical sciences, tarbiat modares university, tehran, ir iran mohammad sirousazar faculty of chemical engineering, urmia university of technology, urmia, ir iran fatemeh mohammadnejad department of parasitology, school of medical sciences, tarbiat modares university, tehran, ir iran

background polyvinyl alcohol (pva) is one of the well-known polymers, which has been used in numerous biomedical applications because of its good biocompatibility. objectives due to problems made by the therapeutics already used for leishmaniasis, the aim of this study was to evaluate the effect of pva containing artemether in treating cutaneous leishmaniasis in balb/c mice. materials and metho...

Journal: :iranian journal of basic medical sciences 0
maryam kouchak nanotechnology research center, ahvaz jundishapur university of medical sciences, ahvaz, iran 2 department of pharmaceutics, school of pharmacy, ahvaz jundishapur university of medical sciences, ahvaz, iran abdolghani ameri microbiology research center, ahvaz jundishapur university of medical sciences, ahvaz, iran 4 department of food and drug control, school of pharmacy, ahvaz jundishapur university of medical sciences, ahvaz, iran basireh naseri 1 nanotechnology research center, ahvaz jundishapur university of medical sciences, ahvaz, iran sara kargar boldaji nanotechnology research center, ahvaz jundishapur university of medical sciences, ahvaz, iran

objective(s): the aim of this study was to insert nitrofurazone in a chitosan membrane to be used as a wound dressing.   materials and methods: several blend films using chitosan (cs) and polyvinyl alcohol (pva), containing nitrofurazone were prepared by means of casting/solvent evaporating technique. different characteristics such as mechanical properties, water vapor transmission rate (wvtr),...

The Poly (vinyl alcohol)/Kefirane nanofiber membrane was successfully fabricated for the firsttime using electrospinning of the polyvinyl alcohol (PVA) and Kefirane blend solution. Scanningelectron microscope (SEM), attenuated total reflectance Fourier transform infrared (ATRFT-IR), and differential scanning calorimetry (DSC) were used to characterize the electrospunPoly (vinyl alcohol)/Kefiran...

Journal: :International Journal of Toxicology 2017

2015
A. Filimon R. M. Albu E. Avram

The rheological response of blends obtained from quaternized polysulfone and polyvinyl alcohol in N-methyl-2pyrrolidone as against structural peculiarity of polymers from the blend, composition of polymer mixtures, as well as the types of interactions were investigated. Results show that the variation of polyvinyl alcohol composition in the studied system determines changes of the rheological p...

Journal: :iranian journal of pharmaceutical sciences 0
shahin bonakdar biomedical engineering department, islamic azad university of mashhad, mashhad, iran fariba orang biomedical engineering department, amirkabir university of technology, tehran, iran mohammad rafienia plysics and biomedical engineering department, isfahan university of medical sciences, iran rana imani biomedical engineering department, amirkabir university of technology, tehran, iran,

determination of blood compatibility is an important problem in blood contacting devices. in this study, two classes of materials including polyurethane (based on polyethylene glycol and poly tetrametylene oxide) and polyvinyl alcohol samples, with different hydrophilicity properties were synthesized and their physico-chemical properties were compared. water uptake ratio, ftir spectroscopy, and...

Journal: :nutrition and food sciences research 0
akbar jokar fars agricultural and natural resources research and education center, shiraz, zarghan. mohamad hossein azizi college of agriculture, tarbiat modares university, tehran, iran zohre hamidi esfehani college of agriculture, tarbiat modares university, tehran, iran

background and objectives: preparation and evaluation of nanocomposite films have become prevalent in recent years. depending on the purpose of using the film, and considering the effects and interaction effects of nanomaterial and other modifiers on the film properties, the amounts of nanomaterials and modifiers should be optimized. the effects of montmorillonite (mmt), glycerol (gl), and thei...

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