Navegação Ciências Exatas e da Terra por Autor "Costa, Tania Maria Haas"
Resultados 1-15 de 15
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7-amino-4-azaheptyl grafted onto a silica gel as a sorbent for the on-line preconcentration and determination of iron(III) in water samples
Moraes, Sandra Valéria Mendes de; Tissot, Mateus Marques; Milcharek, Caroline D.; Brasil, Jorge de Lima; Costa, Tania Maria Haas; Gallas, Marcia Russman; Benvenutti, Edilson Valmir; Lima, Éder Cláudio (2005) [Artigo de periódico]A new sorbent was synthesized by anchoring 7-amino-4-azaheptyltrimetoxisilane, freshly prepared, to silica gel, producing 7-amino-4-azaheptyl anchored silica gel (AAHSG). This material was characterized by infrared ... -
An innovative series of layered nanostructured aminoalkylsilica hybrid material
Trindade, Carolina de Moraes da; Stoll, Gabriela Costa; Pereira, Altair Soria; Costa, Tania Maria Haas; Benvenutti, Edilson Valmir (2009) [Artigo de periódico]Uma nova série de amostras de material híbrido à base de sílica, contendo o grupo catiônico amoniopropil ligado na forma pendente, foi obtida usando-se o método sol-gel de síntese, variando-se a razão molar entre o precursor ... -
Double layer SiO2–TiO2 sol–gel thin films on glass for antireflection, antifogging, and UV recoverable self-cleaning
Fardo, Frederico Meyer; Ribeiro, Rita S. Rodrigues; Strauss, Jamuarê de Almeida; Nardi, Julio Alberto; Ferreira, Licínio F.; Schmökel, Gabriel; Costa, Tania Maria Haas; Pereira, Marcelo Barbalho; Horowitz, Flavio (2020) [Artigo de periódico]Double layer thin films, mechanically stable and adhering to glass, were produced through the sol–gel process, using tetraethyl orthosilicate and titanium butoxide as precursors. The refractive index of the titania and ... -
Extração de Al(III), Cr(III) e Fe(III) de meio etanólico usando o xerogel anilinapropilsílica
Pavan, Flávio André; Costa, Tania Maria Haas; Benvenutti, Edilson Valmir (2004) [Artigo de periódico]In this study, the preparation of the xerogel anilinepropylsilica is reported. The ability of the xerogel for extracting Al(III), Cr(III) and Fe(III) from ethanol was investigated at 25 ºC. The xerogel adsorption capacities ... -
High performance biocatalyst based on β-D-galactosidase immobilized on mesoporous silica/titania/chitosan material
Ricardi, Natália Carminatti; Arenas, Leliz Ticona; Benvenutti, Edilson Valmir; Hinrichs, Ruth; Flores, Elí Emanuel Esparza; Hertz, Plinho Francisco; Costa, Tania Maria Haas (2021) [Artigo de periódico]A new support for the immobilization of β-D-galactosidase from Kluyveromyces lactis was developed, consisting of mesoporous silica/titania with a chitosan coating. This support presents a high available surface area and ... -
Influence of the synthesis conditions on the characteristics and metal adsorption properties of the 3-(1,4-phenyllenediamine)propylsilica xerogel
Vaghetti, Júlio César Pacheco; Brasil, Jorge de Lima; Costa, Tania Maria Haas; Lima, Éder Cláudio; Benvenutti, Edilson Valmir (2005) [Artigo de periódico]O xerogel híbrido 3-(1,4-fenilenodiamina)propilsílica foi obtido partindo-se de duas quantidades de precursor orgânico (5 e 8 mmol) para 22 mmol de TEOS, na síntese. As amostras dos xerogéis foram caracterizadas usando-se ... -
Materiais híbridos à base de sílica obtidos pelo método sol-gel
Benvenutti, Edilson Valmir; Moro, Celso Camilo; Costa, Tania Maria Haas; Gallas, Marcia Russman (2009) [Artigo de periódico]This review deals with silica based hybrid materials obtained by the sol-gel method. It involves concepts, classifications and important definitions regarding the sol-gel method that allows obtaining materials with organic ... -
Silver nanoparticle thin films deposited on glass surface using an ionic silsesquioxane as stabilizerand as crosslinking agent
Schneid, Andressa da Cruz; Pereira, Marcelo Barbalho; Horowitz, Flavio; Mauler, Raquel Santos; Matte, Carla Roberta; Klein, Manuela Poletto; Hertz, Plinho Francisco; Costa, Tania Maria Haas; Menezes, Eliana Weber de; Benvenutti, Edilson Valmir (2015) [Artigo de periódico]Thin films containing silver nanoparticles homogeneously dispersed, with narrow size distribution below 10 nm, were synthesized on flat glass surface, by using an ionic silsesquioxane as stabilizer and crosslinking agent. ... -
Surface morphology of spray-dried nanoparticle-coated microparticles designed as an oral drug delivery system
Beck, Ruy Carlos Ruver; Lionzo, Maria Ismenia Zulian; Costa, Tania Maria Haas; Benvenutti, Edilson Valmir; Ré, Maria Inês; Gallas, Marcia Russman; Pohlmann, Adriana Raffin; Guterres, Silvia Stanisçuaski (2008) [Artigo de periódico]This paper was devoted to studying the influence of coating material (nanocapsules or nanospheres), drug model (diclofenac, acid or salt) and method of preparation on the morphological characteristics of nanoparticle-coated ... -
Synthesis of magnetic nanoparticles functionalized with histidine and nickel to immobilize His-tagged enzymes using β-galactosidase as a model
Andrade, Bruna Coelho de; Gennari, Adriano; Renard, Gaby; Da Rolt Nervis, Brenda; Benvenutti, Edilson Valmir; Costa, Tania Maria Haas; Nicolodi, Sabrina; Silveira, Nádya Pesce da; Chies, Jocelei Maria; Volpato, Giandra; Souza, Claucia Fernanda Volken de (2021) [Artigo de periódico]The aim of this study was to synthesize iron magnetic nanoparticles functionalized with histidine and nickel (Fe3O4-His-Ni) to be used as support materials for oriented immobilization of His-tagged recombinant enzymes of ... -
Synthesis of silica xerogels with high surface area using acetic acid as catalyst
Arenas, Leliz Ticona; Simm, Carolina Wildner; Gushikem, Yoshitaka; Dias, Silvio Luis Pereira; Moro, Celso Camilo; Costa, Tania Maria Haas; Benvenutti, Edilson Valmir (2007) [Artigo de periódico]Nesse trabalho foi estudada a influência do ácido acético na estrutura de poros e na área superficial de sílicas preparadas pelo método sol-gel. Condições experimentais de síntese, tais como temperatura de policondensação ... -
Treatment and characterization of biomass of soybean and rice hulls using ionic liquids for the liberation of fermentable sugars
Pereira, Fernanda da Cunha; Matte, Carla Roberta; Costa, Tania Maria Haas; Dupont, Jairton; Ayub, Marco Antônio Záchia (2020) [Artigo de periódico]We investigated the changes in the physical structure of cellulose recovered from soybean and rice hulls treated with the ionic liquids 1-butyl-3-methylimidazolium chloride ([bmim][Cl]) and 1-butyl-3-methylimidazolium ... -
Tuning anatase-rutile phase transition temperature : TiO2/SiO2 nanoparticles applied in dye-sensitized solar cells
Cardoso, Billy Nunes; Kohlrausch, Emerson Cristofer; Laranjo, Marina Teixeira; Benvenutti, Edilson Valmir; Balzaretti, Naira Maria; Arenas, Leliz Ticona; Santos, Marcos José Leite; Costa, Tania Maria Haas (2019) [Artigo de periódico]TiO2/SiO2 nanoparticles with 3, 5, and 10 molar percent of silica, were synthesized by hydrothermal method and characterized by SEM, TEM, N2 adsorption-desorption isotherms, X-ray diffraction, and Raman and UV-Vis spectroscopy. ... -
A water soluble 3-n-propyl-1-azonia-4-azabicyclo[2.2.2]octanechloride silsesquioxane grafted onto Al/SiO2 surface : chromium adsorption study
Arenas, Leliz Ticona; Simon, Nathália Marcolin; Gushikem, Yoshitaka; Costa, Tania Maria Haas; Lima, Éder Cláudio; Benvenutti, Edilson Valmir (2006) [Artigo de periódico]O material octanocloreto de 3-n-propil-1-azonia-4-azabiciclo[2.2.2] silsesquioxano (dabcosil silsesquioxano) solúvel em água foi obtido. O dabcosil silsesquioxano foi enxertado na superfície da sílica, previamente modificada ... -
Xerogel p-anisidinapropilsílica : estudo da estabilidade térmica e da resistência à lixiviação com solventes
Franken, Leonardo; Santos, Lisiane Santos dos; Caramão, Elina Bastos; Costa, Tania Maria Haas; Benvenutti, Edilson Valmir (2002) [Artigo de periódico]The xerogel p-anisidinepropylsilica was obtained. This solid presents some residual paraffin and also a small fraction of high organofunctionalized material that was leached in polar solvent. The xerogel purification could ...