Cellulose Acetate Film
Mostrando 1-12 de 14 artigos, teses e dissertações.
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1. Immobilization of myoglobin in sodium alginate composite membranes
Abstract The immobilization of myoglobin in sodium alginate films was investigated with the aim of evaluating the protein stability in an ionic polymeric matrix. Myoglobin was chosen due to the resemblance to each hemoglobin tetramer. Sodium alginate, being a natural polysaccharide, was selected as the polymeric matrix because of its chemica
Polímeros. Publicado em: 2015-06
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2. Desenvolvimento de reator tipo "dip catalyst" para filmes poliméricos contendo nanopartículas de metais de transição
This article describes the development of a new catalytic reactor designed to operate with nanoparticle-embedded polymer thin films. Stabilization of metal nanoparticles in films that serve as catalysts in organic reactions is relatively new; therefore, the development of reactors to facilitate their use is necessary. We describe in detail the preparation of
Quím. Nova. Publicado em: 2014
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3. Microbiological quality and other characteristics of refrigerated chicken meat in contact with cellulose acetate-based film incorporated with rosemary essential oil
Antimicrobial active packaging delays or inhibits microorganism growth in packed products, and it can be used in a variety of food systems. The objective of the present research was to develop packaging incorporated with natural antimicrobial agents (active film). The effects of the active film on the spoilage, pathogenic microorganism counts, pH and color o
Braz. J. Microbiol.. Publicado em: 2012-12
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4. Efeito de filme ativo incorporado com óleo essencial de alecrim (Rosamrinus officinalis L.) na conservação de carne de frango resfriada / Effect of active film embedded with rosemary essential oil (Rosamrinus officinalis L.) on conservation of chilled chicken meat
A carne de frango resfriada é um alimento bastante perecível, sendo necessária aplicação de métodos de conservação e armazenamento. O estudo de embalagens capazes não só de proteger, mas também de interagir com o alimento é uma crescente, sendo um exemplo as embalagens antimicrobianas, que devido à presença de conservantes, são capazes de reta
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/08/2010
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5. Characterization and application of thin film of carboxymehtylcellulose acetate butyrate / Caracterização e aplicação de filmes finos de acetato butirato carboximetil celulose
The effect of ethyl acetate and acetone on the solution behavior of cellulose acetate butyrate (CAB) and carboxymehtylcellulose acetate butyrate (CMCAB) and on the characteristics of films obtained either by spin coating or adsorption was investigated. Viscosity and small angle X-ray scattering (SAXS) measurements showed that ethyl acetate is a better solven
Publicado em: 2009
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6. Biocomposites from linters cellulose: cellulose acetate/cellulose and chitosan/cellulose films / Biocompósitos a partir de celulose de linter: filmes de acetatos de celulose/celulose e quitosana/celulose
O presente trabalho visou o estudo da modificação química da celulose de linter (obtida de fonte de rápido crescimento e considerada a celulose de maior pureza isolada de fontes vegetais) através da sua derivatização em meio homogêneo, buscando-se a obtenção de materiais com características bem definidas e via um método que apresente boa reprodut
Publicado em: 2009
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7. Removal of the organic contaminants β-estradiol and saxitoxins (STX, Neo-STX and dc-STX) by nanofiltration : bench scale / Remoção dos contaminantes orgânicos B-estradiol e saxitoxinas (STX, Neo-STX e dc-STX) por meiom de nanofiltração : avaliação em escala de bancada
The aim of work was to investigate the removal of β-estradiol and saxitoxins (STX, dc- STX and Neo-STX) by nanofiltration. These contaminants were selected due to its growing detection in drinking water reservoirs and their potential risk to human health, even at low concentrations. According to the literature, these substances are only poorly removed b
Publicado em: 2007
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8. Glucose microsensor integrated into a catheter / Microssensor para glicose integrado a catéter
The development of electrochemical sensors for glucose integrated into catheters has as basic requisite its miniaturization and the requirement of functioning for relatively long periods in the intravenous environment. The function of such sensors is the continuous monitoring on real time of the clinical evolution of patients hospitalized in intensive therap
Publicado em: 2007
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9. Characterization of composite biofilms of wheat gluten and cellulose acetate phthalate
The objective of this research was to develop and characterize composite biofilms produced using wheat gluten and cellulose acetate phthalate. Biofilms act as barriers to moisture and oxygen diffusion through the film. The films were prepared with different thicknesses and component concentrations and were analyzed for water vapor and oxygen permeabilities,
Brazilian Journal of Chemical Engineering. Publicado em: 2004-06
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10. Preparação, caracterização e aplicações do material celulose-oxido de zirconio
This work describes the preparation and characterization of the cellulose (Cel) and cellulose acetate (Acel) fibers and cellulose acetate film (Macel) coated with ZrO2. Furthermore, they were modified by reacting phosphoric acid, resulting in the modified materials: Cel/ZrO2/Phosphate and Acel/ZrO2/Phosphate fibers and Macel/ZrO2/Phosphate films. The zirconi
Publicado em: 2003
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11. Propriedades fotoeletroquimicas da polianilina
The photocharacterisrics of the polyaniline-electrolyte junction has been investigated in order to check the possibility of using it as a low cost photoactive material and large area solar cells. We compared the photoelectrochemical response of 3 types of films: (1) Polyaniline film (electrochemically synthesized), (2) Pani/CA composite (cellulose acetate) -
Publicado em: 1997
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12. Membranas assimetricas de acetato de celulose para osmossedimentação e ultrafiltração
The objective of this work is the obtention of membranes with suitable characteristics for osmosedimentation of proteins and other macrosolutes. The influence of several factors on the membranes preparation was investigated: solvent evaporation time, total film thickness, cellulose acetate concentration and solvent mixture composition in the casting solution
Publicado em: 1983