3122540 documents found, page 8354 of 312254
Filmes biopoliméricos antimicrobianos para revestimento de sementes de feijão (...
Araújo, Luana Gomes Cordeiro deIn this study, we evaluated the use of zein based films, maize storage protein, to the bean seed coating (Phaseolus vulgaris). The tested solutions were obtained using 1% by weight of zein and 4% alcohol solution. Initially, a study was conducted with four different alcoholic solution (ethanol, isopropanol, methanol and ethanol / sodium hydroxide solution), where it was shown that the film properties are affect...
Obtenção de membranas cerâmicas utilizando matérias-primas regionais e alternat...
Souza, Joseneto deSeparation processes involving ceramic membranes have shown high potential for applications in various industrial sectors. The main reasons for the advancement of these separation technologies are the fact that these membranes work without the addition of chemical agents and require low energy. Currently, the main concern in their development is to minimize costs and achieve more efficient production processes....
Obtenção de Zeólitas sintéticas a partir de cinza volante ativada alcalinamente...
Medeiros, Fabiana Kelly deZeolites are porous solids whose chemical composition is mainly formed of silicon and aluminum elements and silicon in the form of crystalline hydrated aluminosilicates. These materials have particular properties inherent its structural characteristics that make them useful in many industrial applications. The synthesis of zeolites from waste and natural sources of silicon and aluminum has stood out due to envi...
Influência da secagem de massa de revestimento cerâmico em indústria e laborató...
Aquino, Robson Cesar Alves deKnowing that is the atomization process in which water contained in a suspension is removed by evaporation in a controlled manner, for ceramic materials, the main function of the atomization process is dry and at the same time the granular powder. The objective of this study was to compare post resulting from the atomization methods in industry and in the laboratory, in addition to the dry powder prepared in an...
Otimização da ativação com carbonato de lítio (Li2CO3) através de diferentes mé...
Brasileiro, Camila TavaresBentonite clays from the municipality of Boa Vista - PB have a high percentage of contaminants or coarse fractions, providing unsatisfactory rheological results for application in drilling fluids of oil wells. A purification process is necessary in order to improve the rheological behavior of these dispersions and to adapt them to the standards required by Petrobrás EP-1EP-00011-A, 2011 and API 13A, 1993.The pr...
Síntese e caracterização de nanofibras de zeína incorporadas com progesterona e...
Santos, Camila de OliveiraIt is estimated that the economic potential of nanofibers is now worth $ 14 billion, but exploiting this potential depends directly on the development of new techniques so that fibers are obtained with lower cost and higher efficiency. Given this scenario, the objective of the study was to obtain zein fibers with nano and micrometer diameter with the aid of an electrospinning system and meet the physicochemical...
Caracterização de resíduos da indústria cerâmica e seu emprego em argamassas de...
Carvalho, Carlos Maviael deSustainable development drives companies to take steps to assist in minimizing the environmental impact. In the state of Paraiba there are about 140 red ceramic enterprises daily discarding lot of waste from failures of the production system. This type of waste is not easily reincorporated in nature, constituting a product which causes environmental impact. This research seeks to do the complete characterizatio...
Revestimento a base de compósito epóxi-bentonita/ZnO utilizando fiação por sopr...
Veras, Tiago NevesBrazil already produces more than 2 million barrels-per-day and this has a production forecast to increase in the coming years, when platforms had been operating at full potential. Increase in exploration directly affects the constituent alloy carbon steel to transport oil through the pipeline, increasing the oxidation caused mainly by sulfur elements and holders of hydrogen, whose main compound is H2S. Therefo...
Caracterização de micro e nanofibras de PLA produzidas através da fiação por so...
Martins, Martina FonsecaIn the emerging field of nanostructured materials, there are the polymeric nanofibers, because to its large number of possible applications, such as in drug delivery systems because of their ability to bioabsorbilidade and controlling the rate of active substances encapsulated. The nanofibers may be produced by various techniques, including blow spinning solution (SBS), which can be used to produce micro and na...
Desenvolvimento de sistemas de liberação controlada de nutrientes agrícolas uti...
Pimenta, Igor FernandesIn this work, glycerol-derived polymers for controlled release of fertilizers were developed. Such systems aim to minimize fertilizer leaching and avoid groundwater contamination. Thermosetting polyesters were produced by polycondensation of glycerol with citric, adipic and succinic acids, to produce poly(glycerol adipate)-PGA, poly(glycerol citrate)-PGC, poly(glycerol succinate)PGSU, poly(glycerol l adipate -c...