Poly Acrylic Acid
Mostrando 13-24 de 24 artigos, teses e dissertações.
-
13. Antibacterial activity of chitosan and the interpolyelectrolyte complexes of poly(acrylic acid)-chitosan
A atividade antimicrobiana de quitosana e complexos interpolieletrolíticos hidrossoluvéis de poli(ácido acrílico)-quitosana foi estudada. Quitosanas de dois diferentes pesos moleculares foram testados em diferentes concentrações, 0,5 a 5 g • L-1, como agentes antimicrobianos nas P. aeruginosa e P. oleovorans. Em ambos os casos, obteu-se a melhor inib
Brazilian Archives of Biology and Technology. Publicado em: 2010-06
-
14. Uso das técnicas de infravermelho e de ressonância magnética nuclear na caracterização da reação ácido-base de um cimento odontológico experimental
Glass ionomer cements (GICs) are products of the acid-base setting reaction between an finely fluoro-alumino silicate glass powder and poly(acrylic acid) in aqueous solution. The sol gel method is an adequate route of preparation of the glasses used to obtain the GICs. The objective of this paper was to compare two powders: a commercial and an experimental a
Química Nova. Publicado em: 2009
-
15. Propriedades físicas da resina acrílica para coroas provisórias em função de diferentes técnicas de polimerização (rugosidade, porosidade, microdureza, sorção e solubilidade) / Physical properties of acrylic resin for provisional crowns under different curing techniques
An in vitro evaluation of the influence of three variables (polymerization medium (air/water), temperature and pressure) on roughness, porosity, microhardness, sorption and solubility of an acrylic resin for provisional crowns was conducted according to 4 techniques (direct and indirect). The samples were prepared using a poly (methylmethacrylate) (PMMA) res
Publicado em: 2009
-
16. Preparação, caracterização morfologica e aplicações de hidrogeis de P(N-isopropilacrilamida-co-acido acrilico) / Preparation, morphological characterization of P(NIPAAM-CO-AAc) hydrogels
Hydrogels composed of polymeric networks are of great interest as biomaterials. In this work hydrogels of poly(N-isopropilacrilamide) copolimerized with acrylic acid (P(NIPAAm-co-AAc)) and cross-linked with metilene-bisacrilamide (MBAAm) at different cross-linking degrees, interpenetrated (IPNs) and semi-IPNs with PVA. The presence of AAc allowed increasing
Publicado em: 2008
-
17. Preparo e caracterização de membranas de quitosana modificadas com poli (ácido acrílico)
The aim of this study was to generate an asymmetric biocompactible and biodegradable chitosan membrane modified by the contact with a poly(acrylic acid) solution at one of its sides at room temperature and 60◦C. The pure chitosan membrane, as well as the ones treated with poly(acrylic acid) were characterized by infrared spectroscopy (FTIRATR) at
Publicado em: 2006
-
18. Biomechanical and histological evaluation of hydrogel implants in articular cartilage
We evaluated the mechanical behavior of the repaired surfaces of defective articular cartilage in the intercondylar region of the rat femur after a hydrogel graft implant. The results were compared to those for the adjacent normal articular cartilage and for control surfaces where the defects remained empty. Hydrogel synthesized by blending poly(2-hydroxyeth
Brazilian Journal of Medical and Biological Research. Publicado em: 2000-03
-
19. Hidrogel sintetico para reparo de defeitos da cartilagem articular
This work shows a study carried out with synthetic hydrogels aiming the obtention of a biomaterial to be used in the repair of articular cartilage defects. Hydrogels samples of poly (2-hydroxy ethyl methacrylate) (polyHEMA) and blends of polyHEMA with cellulose acetate (CA) or poly(methyl methacrylate-co-acrylic acid) (poly(MMA-co-AA)) was obtained by therma
Publicado em: 1997
-
20. Caracterização de latex poliestirenicos por centrifugação em gradiente de densidade
This thesis contains five parts: Synthesis of polystyrene and poly[styrene-co-(acrylic acid)] latices, containing the basic information on emulsion polymerization together with the procedures used in this work, in the synthesis of PS and PSAA latices. Characterization of the latices of polystyrene and poly[styrene-co-(acrylic acid)], where the products of sy
Publicado em: 1994
-
21. Oriented antibody immobilization to polystyrene macrocarriers for immunoassay modified with hydrazide derivatives of poly(meth)acrylic acid
BioMed Central.
-
22. Chemically induced supramolecular reorganization of triblock copolymer assemblies: Trapping of intermediate states via a shell-crosslinking methodology
The mechanism of morphological phase transitions was studied for rod-shaped supramolecular assemblies comprised of a poly(acrylic acid)-block-poly(methyl acrylate)-block-polystyrene (PAA90-b-PMA80-b-PS100) triblock copolymer in 33% tetrahydrofuran/water after perturbation by reaction with a positively charged water-soluble carbodiimide. Tetrahydrofuran solva
National Academy of Sciences.
-
23. PhaG-Mediated Synthesis of Poly(3-Hydroxyalkanoates) Consisting of Medium-Chain-Length Constituents from Nonrelated Carbon Sources in Recombinant Pseudomonas fragi
Recently, a new metabolic link between fatty acid de novo biosynthesis and biosynthesis of poly(3-hydroxy-alkanoate) consisting of medium-chain-length constituents (C6 to C14) (PHAMCL), catalyzed by the 3-hydroxydecanoyl-[acyl-carrier-protein]:CoA transacylase (PhaG), has been identified in Pseudomonas putida (B. H. A. Rehm, N. Krüger, and A. Steinbüchel,
American Society for Microbiology.
-
24. Adhesion of Lactobacillus amylovorus to Insoluble and Derivatized Cornstarch Granules
Approximately 70% of the cells in a suspension of the amylolytic bacterium Lactobacillus amylovorus bind to cornstarch granules within 30 min at 25°C. More than 60% of the bound bacteria were removed by formaldehyde (2%) or glycine (1 M) at pH 2.0. More than 90% of the bound bacteria were removed by MgCl2 (2 M; pH 7.0). Binding of L. amylovorus to cornstarc