Modified Cellulose Acetate
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. AVALIAÇÃO DO PERFIL DE LIBERAÇÃO DO FÁRMACO IBUPROFENO EM MEMBRANAS SIMÉTRICAS E ASSIMÉTRICAS DE ACETATO DE CELULOSE: EFEITO DA MORFOLOGIA
Cellulose derivatives still receive special attention in today biomedical applications due to their biocompatibility, ability to form resistant membranes and compatibility with various bioactive agents. In this work, cellulose acetate (CA) was used to prepare membranes with different morphologies aiming to evaluate the release profile of the drug ibuprofen (
Quím. Nova. Publicado em: 21/10/2019
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2. Cationic dyes immobilized on cellulose acetate surface modified with titanium dioxide : factorial design and an application as sensor for NADH
As propriedades eletroquímicas dos corantes catiônicos, azul de meldola e azul de toluidina, imobilizados na superfície do acetato de celulose modificado com dióxido de titânio foram investigadas por voltametria cíclica. Os materiais sintetizados foram empregados como eletrodos de pasta de carbono. As propriedades mediadoras redox dos eletrodos modific
Publicado em: 2010
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3. Methylene blue immobilized on cellulose acetate with titanium dioxide: an application as sensor for ascorbic acid
Neste trabalho, o corante azul de metileno foi imobilizado na superfície do acetato de celulose modificado com dióxido de titânio produzindo um material híbrido sólido denominado de CA-TiO2MB. O experimento produziu uma quantidade de 1,8 mmol g-¹ de TiO2 incorporado no acetato de celulose e uma quantidade de 0,170° 0,005 mmol g-¹ de azul de metileno
Publicado em: 2010
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4. Cationic dyes immobilized on cellulose acetate surface modified with titanium dioxide: factorial design and an application as sensor for NADH
As propriedades eletroquímicas dos corantes catiônicos, azul de meldola e azul de toluidina, imobilizados na superfície do acetato de celulose modificado com dióxido de titânio foram investigadas por voltametria cíclica. Os materiais sintetizados foram empregados como eletrodos de pasta de carbono. As propriedades mediadoras redox dos eletrodos modific
Journal of the Brazilian Chemical Society. Publicado em: 2007
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5. 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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6. Growth rate control of adherent bacterial populations.
We report a novel in vitro method which, through application of appropriate nutrient limitations, enables growth rate control of adherent bacterial populations. Exponentially growing cells are collected by pressure filtration onto cellulose acetate membranes. Following inversion into the bases of modified fermentors, membranes and bacteria are perfused with
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7. Antitoxin-in-Membrane and Antitoxin-in-Well Assays for Detection of Toxigenic Corynebacterium diphtheriae
The Elek culture plate precipitin test is routinely used for the detection of exotoxin from toxigenic strains of Corynebacterium diphtheriae. Recently, the World Health Organization standardized this test to ensure accuracy, reliability, and reproducibility. In this study, we further modified the standard Elek test by using the antitoxin-in-membrane (AIM) an
American Society for Microbiology.
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8. Biotinylinsulins as potential tools for receptor studies
The preparation of affinity columns that contain insulin attached to Sepharose in a targeted manner by way of biotin-avidin noncovalent bonds is described. Insulin was acylated selectively at the amino terminus of the B chain with the N-hydroxysuccinimido ester of biotin to form Nα,B1-biotinylinsulin. The ability of this modified insulin to stimulate rat ep
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9. Comparison of six media, including a semisolid agar, for the isolation of various Campylobacter species from stool specimens.
A recently described semisolid blood-free selective motility medium (SSM) (J. Goossens, L. Vlaes, I. Galand, C. Van den Borre, and J. P. Butzler, J. Clin. Microbiol. 27:1077-1080, 1989) was compared with two charcoal-based selective media (charcoal-based selective medium [CSM] and modified charcoal cefoperazone deoxycholate agar [CCDA]), two blood-based medi
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10. Construction and characterization of recombinant Vibrio cholerae strains producing inactive cholera toxin analogs.
The catalytic A subunit of cholera toxin (CT-A) is capable of ADP-ribosylating the guanine nucleotide-binding protein, which regulates cell adenylyl cyclase, leading to the life-threatening diarrhea of cholera. Amino acids involved in the enzymatic activity of CT-A have previously been identified. By means of site-directed mutagenesis, an analog of the CT-A