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55 results for “polymers”
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Research NotesOpen accessIn the abstractPolymerisation and Oxidation of Docosahexaenoic AcidBrian Mundell Ross, Shelly Lynn Browning, Adrian McKeeOils rich in polyunsaturated fatty acids, such as linseed oil, can oxidise to form polymers. These can be used as protective coatings and act as an alternative to those derived from petrochemicals. Such renewable source oils usually require the addition of metal ions as catalysts of the polymerisation process and/or the partial pre-oxidation of the oil before use. We hypothesised … …American Journal of Biochemistry and Biotechnology, Vol. 12, Issue 1 · 11 Dec 2015 · 7,612 accessesView PDFCite
Research ArticleOpen accessIn the abstractSynthesis of Well-Defined Vinyl End-Functional Polystyrene Using Multifunctional Initiator by Atom Transfer Radical PolymerizationSamiul Islam Chowdhury, Roushown Ali, Tariqul HasanAtom Transfer Radical Polymerization (ATRP) has proven to be a powerful technique to obtain polymers with narrow polydispersities and controlled molecular weight. It also offers control over chain-ends. N-allyl-2-bromopropinamide (ABPN) was synthesized by one step reaction which involved on amidification of 2-bromo-propionyl bromide with allyl amine. 1H NMR has confirmed the structure of the ABPN. The well-defined polystyrene was synthesized … …American Journal of Applied Sciences, Vol. 12, Issue 8 · 13 Sep 2015 · 7,048 accessesView PDFCite
Research ArticleOpen accessIn the abstractVARIABILITY IN THE LIGNINOLYTIC ENZYMES ACTIVITY BY LENTINULA EDODES IN SUBMERGED CULTURE WITH LIGNIN AND GLUCOSECitlalli Harris-Valle, Elisa Valenzuela-Soto, Alfonso Sánchez et al.The white-rot basidiomycete Lentinula edodes is the second most edible mushroom cultivated on the world. This fungus decomposes cell-wall associated macromolecules, is a natural degrader of lignin polymers. The differences in enzyme activities between strains of L. edodes provided useful information about the participation of enzymes in different development stages of the fungus. The effect of lignin on the fungal … …American Journal of Agricultural and Biological Sciences, Vol. 9, Issue 3 · 28 Apr 2014 · 7,845 accessesView PDFCite
Research ArticleOpen accessIn the abstractEnhanced Dielectric Properties of Polyaniline/Silver/Carbon Nanotubes NanocompositeS. M. Reda, Sheikha M. Al-GhannamCurrent researches had shown that the electrical conductivity of most polymers depend on the method of its preparation and type of fillers. This research therefore aimed at studying the electrical properties of polyaniline carbon nanotubes nanocomposite prepared by hand mixing and decoration methods. The effect of preparation method on electrical properties of polyaniline containing Carbon Nanotubes (CNTs) and silver nanoparticles … …Current Research in Nanotechnology, Vol. 4, Issue 1 · 13 Jan 2014 · 7,019 accessesView PDFCite
Research ArticleOpen accessIn the abstractProperties of Chitosan Nanoparticles Formed Using Sulfate Anions as Crosslinking BridgesMayyas M.A. Al-RemawiProblem statement: The preparation of new simple Chitosan nanoparticle delivery system is very important and could have many applications particularly in pharmaceutical field to be used as a drug delivery system. In this study, the production of robust Chitosan nanoparticles has been developed and characterized by chemical crosslinking using sulfate anions. Approach: Chitosan polymer is considered one of the best … …American Journal of Applied Sciences, Vol. 9, Issue 7 · 28 May 2012 · 9,871 accessesView PDFCite
Research ArticleOpen accessIn the abstractPermeability, Strength and Filtration Performance for Uncoated and Titania-Coated Clay Wastewater FiltersMasturi, Silvia, Mahardika Prasetya Aji et al.Problem statement: Wastewater problems continue to be a relevant issue, particularly in urban areas. One promising low-cost material for manufacturing porous ceramics as water filter is clay. Clays can be blended with other materials such as polymers to obtain functional ceramic materials. Approach: Ceramic wastewater filters were fabricated from clay using both sol-gel and simple mixing methods followed by hot-pressing … …American Journal of Environmental Sciences, Vol. 8, Issue 2 · 29 Feb 2012 · 8,395 accessesView PDFCite
Research ArticleOpen accessIn the abstractImprovement of the Thermal, Photo and Mechanical Properties of Poly (Vinyl Chloride) in Presence of Poly (Glycidyl Methacrylate)Abir S. Abdel-NabyProblem statement: Poly (vinyl chloride) suffers from poor heat stability. The thermal degradation of the polymer leads to the evolution of hydrogen chloride gas, extensive discoloration of the polymer and lowering of physical and mechanical properties. Approach: Binary blends of Poly (Vinyl Chloride) (PVC) and Poly (Glycidyl Methacrylate) (PGMA) have been prepared by solution blending aimed at the improvement of … …American Journal of Applied Sciences, Vol. 8, Issue 7 · 24 Jun 2011 · 7,374 accessesView PDFCite
Research ArticleOpen accessIn the abstractEndothelial Dysfunction Induced by Type 2 Diabetes Mellitus and Fibrinolytic ActivityHussein F. SakrProblem statement: Type 2 diabetes mellitus is the world's largest systemic and metabolic disease. Endothelin (ET) was first described as a peptidergic endothelium-derived constricting factor. Endothelin-1 is one of the endothelial factors that is overexpressed in cases of endothelial dysfunction. The fibrinolytic system is present in plasma with the degradation of fibrin polymers in blood clots. It is a proteolytic … …American Journal of Biochemistry and Biotechnology, Vol. 6, Issue 2 · 30 Jun 2010 · 7,729 accessesView PDFCite
Research ArticleOpen accessIn the abstractConcentration and Physicochemical Properties of Chitosan Derivatives Determine the Induction of Defense Responses in Roots and Leaves of Tobacco (Nicotiana tabacum) PlantsAlejandro B. Falcón-Rodríguez, Juan C. Cabrera, Eduardo Ortega, Miguel Ángel Martínez-TéllezProblem statement: The chitosan derivatives promote diverse defensive responses in plants, which are affected by chitosan chemical features and concentration. Glucanase (EC 3.2.1.6), Phenylalanine Ammonia-Lyase (PAL, EC 4.3.1.5) and peroxidase (POD, EC 1.11.1.6) are key enzymes in tobacco defense responses. Thus, the aim of this study was to know the behavior of their enzymatic activity in leaves and roots of … …American Journal of Agricultural and Biological Sciences, Vol. 4, Issue 3 · 30 Sep 2009 · 9,263 accessesView PDFCite