نتایج جستجو برای: پلی لاکتیک اسید plla
تعداد نتایج: 34969 فیلتر نتایج به سال:
Biodegradable poly(L-lactide) (PLLA)/multiwalled carbon nanotubes (MWNTs) nanocomposites were prepared via solution blending using two kinds of MWNTs, i.e., pristine multiwalled carbon nanotubes (p-MWNTs) and carboxyl-functionalized multiwalled carbon nanotubes (f-MWNTs). Various techniques were used to investigate the functionalization of MWNTs on the morphology, crystallization, and hydrolyti...
Porous titanium (pTi) can possess a low Young's modulus equal to that of human bone, depending on its porosity. However, the mechanical strength of pTi deteriorates greatly with increasing porosity. On the other hand, certain medical polymers exhibit biofunctionalities, which are not possessed intrinsically by metallic materials. Therefore, a biodegradable medical polymer, poly-L-lactic acid (P...
مقدمه: سرکه یک چاشنی پرمصرف در سراسر جهان است که از مواد اولیه و روشهای متفاوت برای تولید آن استفاده میشود. در ایران نیز انواع سرکههای طبیعی با استفاده از میوههای مختلف مانند انگور و سیب، بیشتر بهصورت خانگی تهیه میشود. سرکه طبیعی دارای خواص بسیار زیادی است و طب سنتی ایرانی اسلامی نیز مصرف آن را توصیه کرده است. سرکه حاوی باکتریهای اسید استیک، اسید لاکتیک و مخمر است. باکتریهای اسید استیک ...
Morphine-loaded poly(L-lactide)-poly(ethylene glycol)-poly(L-lactide) (PLLA-PEG-PLLA) microparticles were prepared using solution enhanced dispersion by supercritical CO2 (SEDS). The effects of process variables on the morphology, particles size, drug loading (DL), encapsulation efficiency and release properties of the microparticles were investigated. All particles showed spherical or ellipsoi...
Miniemulsion homopolymerization reactions of methyl methacrylate (MMA) and styrene (STY) using poly(L-lactide) as co-stabilizer were carried out in order to prepare poly(L-lactide)/poly(methyl methacrylate) (PLLA/PMMA) and poly(L-lactide)/polystyrene (PLLA/PS) binary blend nanoparticles. The effect of PLLA concentration on methyl methacrylate (MMA) and styrene (STY) homopolymerization reactions...
In order to accelerate the crystallization of poly(L-lactic acid) (PLLA) biopolymer and enhance its crystallizability, biocompatible and environmentally friendly tungsten disulphide inorganic nanotubes (INT-WS2) were introduced into the polymer matrix. The non-isothermal cold-crystallization and subsequent melting behaviour of pure PLLA and PLLA/INT-WS2 nanocomposites were investigated in detai...
Drug-loaded electrospun PLLA membranes are not conducive to adhesion between materials and tissues due to the strong hydrophobicity of PLLA, which possibly attenuate the drugs' effect loaded on the materials. In the present work, we developed a facile method to improve the hydrophilicity of doxorubicin (DOX)-loaded electrospun PLLA fibrous membranes, which could enhance the anti-tumor effect at...
In this work, biodegradable Poly(L-lactide) (PLLA) was modified through adding a new organic additive N, N -bis(benzoyl) 1, 4-naphthalenedicarboxylic acid dihydrazide (NABH). A comparison on crystallization of the pure PLLA and PLLA/NABH revealed that NABH as effective heterogeneous nucleation sites enhanced PLLA
In this work, poly(L-lactic acid)/poly(lactide-co-glycolide) (PLLA/PLGA) microparticles were prepared using the technique of solution-enhanced dispersion by supercritical fluids (SEDS). For comparison, separate PLLA and PLGA microparticles were also produced by the same SEDS process. The produced microparticles were characterized by scanning electron microscopy, laser particle size analyzer, X-...
سابقه و هدف: شیر خام میتواند منبعی برای سویههای جدید باکتریهای اسید لاکتیک تولیدکننده باکتریوسین با توانایی مهار میکروارگانیسمهای نامطلوب باشد. این تحقیق با هدف جداسازی باکتریهای اسید لاکتیکِ تولید کننده باکتریوسین از شیر خام میش و بز و تعیین ویژگیهای باکتریوسینهای جدا شده انجام گرفت. مواد و روشها: به منظور جداسازی باکتریهای اسید لاکتیک تولید کننده باکتریوسین 100 نمونه شیر میش و بز مور...
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