نتایج جستجو برای: polyesters
تعداد نتایج: 2577 فیلتر نتایج به سال:
Thermoset polyesters are prepared from epoxidized waste frying sunflower oil (ESO), commercially available epoxy compounds and glutaric acid. Influence of the nature concentration bi- trifunctionnal on mechanical properties is studied. Static dynamic tests performed. The molar amount commercial used ranges 20% to 80% regarding ESO. It enables obtain thermosetting with glass transition temperatu...
An artificial enzyme cascade composed of an alcohol dehydrogenase, an enoate reductase and a Baeyer-Villiger monooxygenase was investigated in vitro to gain deeper mechanistic insights and understand the assets and drawbacks of this multi-step biocatalysis. Several substrates composed of different structural motifs were examined and provided access to functionalized chiral compounds in high yie...
Poly (3-hydroxy alkanoate)s, PHAs, have been very attractive as biomaterials due to their biodegradability and biocompatibility. These hydrophobic natural polyesters, PHAs, need to have hydrophilic character particularly for drug delivery systems. In this manner, poly (ethylene glycol) (PEG) and hydrophilic functional groups such as amine, hydroxyl, carboxyl and sulfonic acid have been introduc...
Polyhydroxybutyrate Homopolymers (PHB) were produced by transgenic yeasts Saccharomyces cerevisiae INVSc1/PHA1 and Schizosaccharomyces pombe Q01/PHB equipped in their cytoplasm and chromosome with the phaABC operon of the PHA biosynthetic pathway of Ralstonia eutropha, respectively. Re The polyesters were purified and physically characterized by Differential Scanning Calorimetry (DSC) and Infra...
Small molecule chemotherapeutics often have undesired physiochemical and pharmacological properties, such as low solubility, severe side effect and narrow therapeutic index. To address these challenges, polymeric nanomedicine drug delivery technology has been routinely employed, in particular with the use of biodegradable and biocompatible polyesters, such as poly(lactide) (PLA) and poly(lactid...
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