Zobrazeno 1 - 10
of 20
pro vyhledávání: '"C. L. de Vasconcelos"'
Autor:
P. S. Botelho, Gabriel Olivo Locatelli, T. C. L. de Vasconcelos, M. S. de Amorim, L. A. Bueno, D. A. Coêlho, G. F. dos Santos
Publikováno v:
Journal of Sol-Gel Science and Technology. 75:345-352
The growing environmental concern in all segments of society has aroused the interest of the scientific community in the search for alternatives to reduce the use of pesticides, getting highlighted the use of antagonists microorganisms, as species of
Publikováno v:
Carbohydrate Research. 346:614-618
Solutions of chitin in Li(+)/N,N-dimethylacetamide systems were studied via viscometry, using LiCl concentrations of 3% and 5% (m/v) and chitin concentrations ranging from 0.075 to 0.375 gL(-1). The reduced viscosity number versus concentration plot
Autor:
Tereza Neuma de Castro Dantas, C. L. de Vasconcelos, J.L.C. Fonseca, J.S. Nunes, M. R. R. Pereira
Publikováno v:
Journal of Dispersion Science and Technology. 29:769-774
Latexes based on ethyl methacrylate and acrylic acid with dispersed magnetite particles were obtained using the technique of miniemulsion polymerization. The polymerizations were carried out (using AIBN as the initiator) after the dispersion of magne
Adsorption of Bovine Serum Albumin on Template-Polymerized Chitosan/Poly(methacrylic acid) Complexes
Autor:
Tereza Neuma de Castro Dantas, J.L.C. Fonseca, M. R. R. Pereira, P. M. Bezerril, C. L. de Vasconcelos
Publikováno v:
Langmuir. 23:7687-7694
Particulate systems composed of polyelectrolyte complexes (PEC) based on chitosan and poly(methacrylic acid) were obtained via template polymerization. The resultant particles were characterized as having regions with different charge densities: chit
Autor:
C. L. de Vasconcelos, M. R. R. Pereira, J.H. de Araújo, J.S. Nunes, F.A.O. Cabral, J.L.C. Fonseca
Publikováno v:
Polymer. 47:7646-7652
Magnetic particles are very important systems with potential use in drug delivery systems, ferrofluids, and effluent treatment. In many situations, such as in biomedical applications, it is necessary to cover inorganic magnetic particles with an orga
Autor:
L.M. Bezerril, Tereza Neuma de Castro Dantas, C. L. de Vasconcelos, M. R. R. Pereira, J.L.C. Fonseca
Publikováno v:
Colloids and Surfaces A: Physicochemical and Engineering Aspects. 287:24-28
Rheological properties of kaolin dispersions have been analyzed as a function of kaolin/chitosan mass ratio. Zeta potential measurements characterized the particles as negatively charged, resulting in the feasibility of chitosan (a cationic polyelect
Autor:
J.S. Nunes, Tereza Neuma de Castro Dantas, M. R. R. Pereira, J.L.C. Fonseca, C. L. de Vasconcelos
Publikováno v:
Colloids and Surfaces A: Physicochemical and Engineering Aspects. 275:148-152
Aqueous dispersions of poly(butyl acrylate-co-methacrylic acid) were obtained via emulsion polymerization of butyl acrylate and methacrylic acid, using sodium persulfate as the initiator and sodium dodecyl sulfate as the surfactant. Addition of HCl t
Publikováno v:
Journal of Dispersion Science and Technology. 26:59-70
Polyelectrolytes are very versatile macromolecular materials that have found more and more applications in several technologies. In this article applications related to their use as (de)stabilizers for colloids are reviewed. Additionally, some theori
Autor:
Tereza Neuma de Castro Dantas, K. T. de Moura, J.L.C. Fonseca, Marta Pereira, W. A. Morais, C. L. de Vasconcelos
Publikováno v:
Colloid and Polymer Science. 283:413-420
The stabilities of alumina dispersions were studied as a function of poly- and low molecular weight electrolyte concentration, using viscometry of the dispersing phase, and zeta potential measurements. The relation of polyelectrolyte adsorption to po
Autor:
J.L.C. Fonseca, Tereza Neuma de Castro Dantas, Márcia Rodrigues Pereira, C. L. de Vasconcelos
Publikováno v:
Colloid and Polymer Science. 282:596-601
Rheological properties of concentrated alumina suspensions using a charged copolymer as the dispersant have been studied. The non-Newtonian behavior of these fluids was characterized and correlated to ζ potential measurements and sedimentation colum