Adipic Acid
Mostrando 1-12 de 63 artigos, teses e dissertações.
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1. Biodegradação de alcoóis, ftalatos e adipatos em um solo tropical contaminado
The adipic and phthalic acid esters are plasticizers, have low water solubility, high partition octanol/water coefficients (Kow) and accumulate in soil and sediments. These compounds are considered teratogenic, carcinogenic and endocrine disruptors chemicals. This study evaluated the bioremediation of tropical soil contaminated with plasticizers process wast
Química Nova. Publicado em: 2010
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2. SÃntese de Derivados de Vitamina A utilizando Lipase de Candida antartica Imobilizada (Novozyme 435) / Vitamin A derivatives synthesis using immobilized lipase from Candida antarctica (Novozyme 435)
The main objective of this work was to synthesize vitamin A derivatives through an enzymatic route, as an alternative to chemistry route, more aggressive to the environment. The conversion of retinyl acetate into retinyl palmitate would result in a product with better market acceptance, since it is more stable than the ester used as substrate. Retinyl adipat
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/08/2007
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3. Synthesis and characterization of aliphatic polyesters from glycerol, by-product of biodiesel production, and adipic acid
In the present work, polyesters were prepared from the polycondensation between glycerol and adipic acid using dibutyltin dilaurate as catalyst. Three glycerol: adipic acid molar ratio were used for the bulk polymerization namely: 2:2; 2:3 and 2:4. FTIR confirmed the esterification of glycerol by the acid for all the polymers. DSC and XRD indicated no crysta
Materials Research. Publicado em: 2007-12
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4. Mapeamento das interações proteína-ligante através de técnicas de RMN de ¹H utilizando detecção do ligante
NMR is a valuable screening tool for the binding of ligands to proteins providing structural information on both protein and ligands and is thus largely applied to drug-discovery. Among the recent NMR techniques to probe weak binding protein-ligand complexes we have critically evaluated the advantages and disadvantages of STD (Saturation Transfer Difference)
Química Nova. Publicado em: 2007
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5. Estudo químico e avaliação do potencial farmacológico e herbicida de Maytenus imbricata Mart. ex. Reissek
In this work, it was studied leaves, branches and seeds of Maytenus imbricata, whose chemical constitution and activities pharmacological until this moment had not been reported in literature. From Maytenus imbricata leaves and branches hexane extracts were isolated and identified 3-oxo-lup-20(29)-en-30-al, 30-hydroxy-lup-20(29)-en-3-one, 11 -hydroxy-lup-20(
Publicado em: 2007
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6. Estudo das propriedades termomecanicas e morfologicas de blendas biodegradaveis de poli (epsilon-caprolactona) (PCL) com amido de milho natural e modificado, plastificada com alquil epoxi estearato, com e sem po de fibra de coco / Study of the thermo-mechanical and morphological properties of biodegradable blends based on poly (epsilon-caprolactone)/corn starch plasticized with alquil-epoxy sterate, with and without coconut powder fiber
The mechanical properties of PCL (Polycaprolactone) blend with natural and modified starch (Adipic acid derivative), in the presence of a plasticizer like Alquil Epoxi Stearate, a totally biodegradable product, were studied in this dissertation. The necessity to develop biodegradable polymeric compositions with good mechanical properties, but with competitiv
Publicado em: 2005
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7. Estudo fluidodinamico de um leito fluidizado pulsado rotativo com particulas secas e umidas / Rotating pulsed fluidized bed fluidynamics of dry and moist particles
The rotating-pulsed fluidized bed (RPFB) has been studied as an alternative for fluidization of materials that are difficult to operate in the Conventional Fluidized Bed (CFB). The RPFB apparatus is a conventional fluidized bed modified by the addition of a rotating plate with a 60º opening just below the distributor. The rotating plate insures a cyclic fee
Publicado em: 2005
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8. Adesivos poliuretanicos derivados de PET reciclado : sintese, caracterização e aplicação
In Brazil, the production and recycling index of poly(ethylene terephthalate) -PET have been increased. Therefore it is necessary to increase the possibilities for utilizing this polymer waste. This work aims the chemical recycling as a way to obtain value added products from PET waste. Postconsumer PET bottles were first depolymerized by glycolysis with die
Publicado em: 2004
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9. Modificação e caracterização da poliamida 6,6 com a introdução de silicona aminado
A new route of introduction of silicone on PA - 6,6 chain by polycondensation of a mixture of the correspondent salts, nylon and sylon (2 and 5%) in a pilot reactor, the last one was previously obtained from amine-silicone and adipic acid in THF as a solvent, was developed. The polycondensation reaction was carried at 253°C and 18 bar in pilot reactor. The
Publicado em: 2004
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10. Development of a vibrofluidized bed and fluid-dynamic study with dry and wet adipic acid
The vibrofluidized bed developed in this work, consisting of a transparent plexiglass tube with an inner diameter of 0.1 m and a height of 0.5 m, was designed for the fluidization of adipic acid. The fluidization behavior of dry adipic acid with particle diameters in the range of 75 - 600 mm and a density of 1340kg/m³ was studied using mechanical vibration
Brazilian Journal of Chemical Engineering. Publicado em: 2003-10
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11. Fluidodinamica e secagem do acido adipico em leito vibrofluidizado
The objective of this work is the development and building of a vibrofluidized bed and sampling system for the fluid-dynamic study and drying of adipic acid. The adipic acid investigated in this work presents partic1e diameter in the range of 75 - 600 ?m and density of 1340 kg/m3. Adpic acid is the main intermediate product in the synthesis of Nylon. It is t
Publicado em: 2002
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12. Activated sludge degradation of adipic acid esters.
The biodegradability of three aliphatic adipic acid diesters and a 1,3-butylene glycol adipic acid polyester was determined in acclimated, activated sludge systems. Rapid primary biodegradation from 67 to 99+% was observed at 3- and 13-mg/liter feed levels for di-n-hexyl adipate, di(2-ethylhexyl) adipate, and di(heptyl, nonyl) adipate in 24 h. When acclimate