نتایج جستجو برای: tbhq and pla
تعداد نتایج: 16828270 فیلتر نتایج به سال:
The use of alternative sources for fuel production has been gaining attention in the past years. Thus, role biodiesel seems to be crucial, as it can contribute sustainable economic growth developing countries. main raw materials are vegetable oils, obtaining fatty acid methyl (or ethyl) esters through transesterification with methanol ethanol). properties these natural feedstocks influence qual...
The aim of this work is to explore the manufacturing insulation structures using fused filament deposition biosourced materials. approach considers printing Polylactic acid (PLA) and PLA-flax (PF) varied infill density temperatures. Differential Scanning Calorimetry Thermal Gravimetry analysis are performed study thermal behaviour PLA PF derive weight content fibres within PF. measurements show...
BACKGROUND Pyogenic liver abscess (PLA) is a rare, life-threatening disease with an increasing rate of incidence. Case reports from East Asia suggest that diabetes mellitus is an important risk factor, but formal evidence is limited. METHODS We performed a case-control study with participants drawn from the entire population of Denmark. Cases of PLA were defined as occurring in all patients w...
Background and Objective: Insulin resistance is one of the key components of metabolic syndrome and a major risk factor for diabetes and cardio-vascular diseases, especially among obese people. The aim of this study was to evaluate the effects of L-carnitine supplementation either with or without moderate aerobic training on insulin resistance and anthropometric indices in obese women. Material...
It has been shown previously that several endemic Y. pestis isolates with limited virulence contained the I259 isoform of the outer membrane protease Pla, while the epidemic highly virulent strains possessed only the T259 Pla isoform. Our sequence analysis of the pla gene from 118 Y. pestis subsp. microtus strains revealed that the I259 isoform was present exclusively in the endemic strains pro...
استفاده از پلیمرهای زیست تخریب پذیر مانند پلی لاکتیک اسید، جهت حل مشکلات زیست محیطی در سال های اخیر رو به افزایش بوده است. با این وجود به دلایل اقتصادی، تنوع مواد در دسترس و همچنین عدم پوشش خواص مورد نظر، این پلیمرها کمتر به تنهایی مورد استفاده قرار می گیرند. از میان روش های اصلاح پلیمرهای زیست پایه، آلیاژسازی به عنوان روشی کاربردی و اقتصادی جهت رسیدن به محصولی با خواص مورد نظر، مورد توجه و مطا...
در این کار تحقیقاتی، کوپلیمرهای سه تایی pla-peg-pla با نسبت های مختلف la/eg و نیز فرم اکریله شده آنها سنتز شد و برای تهیه نانوذرات میسل مانند و نانوژل هایی با اندازه های کنترل شده جهت رهش کنترلی داروی ضد مخدر به کار رفت. کوپلیمرهای بدست آمده، نانوذرات میسل مانند و نانوژل های pla-peg-pla بوسیله تکنیک های مختلفی همچون 1hnmr، ft-ir، کروماتوگرافی ژل (gpc)، اسپکترومتری فلورسانس، کالریمتری پویشی تفاض...
Polylactic acid (PLA) was successfully covalently grafted onto multi-walled carbon nanotubes (MWCNT) by microwave-assisted polymerization of lactide monomers. The final products MWCNT-g-PLA were characterized with Fourier-transform IR (FTIR), Raman spectroscopy, thermogravimetric analyses (TGA) and transmission electron microscopy (TEM). The results indicated PLA chain was covalently attached t...
Biodegradable carriers containing gentamicin for local treatment of bone infection were developed. This paper describes the preparation and in vitro evaluation of these biodegradable implants. Poly-L-lactic acid (PLA) and poly-L-lactic acid:polyethylene glycol (PLA/PEG) disk implants containing gentamicin sulphate were obtained by compression of microspheres prepared by a double emulsion proces...
Plasticized poly(lactic acid) PLA with epoxidized vegetable oils (EVO) were prepared using a melt blending method to improve the ductility of PLA. The plasticization of the PLA with EVO lowers the Tg as well as cold-crystallization temperature. The tensile properties demonstrated that the addition of EVO to PLA led to an increase of elongation at break, but a decrease of tensile modulus. Plasti...
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