Search Results - "Viegas, Alexandre da Cas"

Tungsten oxide supported on copper ferrite: a novel magnetic acid heterogeneous catalyst for biodiesel production from low quality feedstock by Lima dos Santos, Hiarla Cristina, Gonçalves, Matheus Arrais, da Cas Viegas, Alexandre, Miranda Figueira, Bruno Apolo, Souza da Luz, Patrícia Teresa, Narciso da Rocha Filho, Geraldo, Vieira da Conceição, Leyvison Rafael

“…This study aims to synthesize a WO 3 /CuFe 2 O 4 catalyst through a wet impregnation method and use it as a new magnetic acid catalyst in the…”
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Boosting biodiesel production of waste frying oil using solid magnetic acid catalyst from agro-industrial waste by Gonçalves, Matheus Arrais, dos Santos, Hiarla Cristina Lima, Ribeiro, Thaissa Saraiva, da Cas Viegas, Alexandre, da Rocha Filho, Geraldo Narciso, Vieira da Conceição, Leyvison Rafael

“…In the present study, a new magnetic acid solid catalyst composed of an agro-industrial waste (rice husk ash-RHA) magnetized with cobalt ferrite (CoFe2O4) and…”
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Incorporation of Magnetic Nanoparticles in Poly(Methyl Methacrylate) Nanocapsules by Ronco, Ludmila I., Feuser, Paulo E., da Cas Viegas, Alexandre, Minari, Roque J., Gugliotta, Luis M., Sayer, Claudia, Araújo, Pedro H. H.

“…Magnetic nanoparticles (MNPs) encapsulated in polymeric systems are promising materials for hyperthermia treatments and targeting drug delivery in cancer…”
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Lanthanum-doped spinel cobalt ferrite (CoFe2O4) nanoparticles for environmental applications by Mariosi, Fabrício Ravanello, Venturini, Janio, da Cas Viegas, Alexandre, Bergmann, Carlos Perez

“…Magnetic nanomaterials have been widely studied as adsorbents in the removal of contaminants from effluents. In this context, lanthanum-doped cobalt ferrites…”
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Excess of cations in the sol-gel synthesis of cobalt ferrite (CoFe2O4): A pathway to switching the inversion degree of spinels by Venturini, Janio, Tonelli, Amanda Mallmann, Wermuth, Tiago Bender, Zampiva, Rubia Young Sun, Arcaro, Sabrina, Da Cas Viegas, Alexandre, Bergmann, Carlos Pérez

“…[Display omitted] •Cobalt ferrite was synthesized via the sol-gel method with varying precursor stoichiometries.•Cation in excess shows a marked preference…”
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One-step purification of a recombinant beta-galactosidase using magnetic cellulose as a support: Rapid immobilization and high thermal stability by Gennari, Adriano, Simon, Renate, Sperotto, Nathalia Denise de Moura, Bizarro, Cristiano Valim, Basso, Luiz Augusto, Machado, Pablo, Benvenutti, Edilson Valmir, Da Cas Viegas, Alexandre, Nicolodi, Sabrina, Renard, Gaby, Chies, Jocelei Maria, Volpato, Giandra, Volken de Souza, Claucia Fernanda

“…[Display omitted] •One-step purification and targeted immobilization process of a β-galactosidase.•These bioprocesses were carried out efficiently on the…”
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The influence of solvent composition in the sol-gel synthesis of cobalt ferrite (CoFe2O4): A route to tuning its magnetic and mechanical properties by Venturini, Janio, Wermuth, Tiago Bender, Machado, Márcia Corrêa, Arcaro, Sabrina, Alves, Annelise Kopp, da Cas Viegas, Alexandre, Bergmann, Carlos Pérez

“…This work presents a successful, environmentally-friendly route for tuning the magnetic and mechanical properties of CoFe2O4 sintered ceramics. The precursor…”
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Low-temperature sol–gel synthesis of magnetite superparamagnetic nanoparticles: Influence of heat treatment and citrate–nitrate equivalence ratio by Polla, Mariana Borges, Nicolini, João Lucas, Venturini, Janio, da Cas Viegas, Alexandre, Zen Vasconcellos, Marcos Antonio, Montedo, Oscar Rubem Klegues, Arcaro, Sabrina

“…Spinel ferrite nanoparticles are a remarkably versatile group of metal oxides with unique magnetic and electronic properties, making them promising candidates…”
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Biodiesel production from waste cooking oil using an innovative magnetic solid acid catalyst based on Ni–Fe ferrite: RSM-BBD optimization approach by Gonçalves, Matheus Arrais, Santos, Hiarla Cristina Lima dos, da Silva, Marcos Augusto Ribeiro, da Cas Viegas, Alexandre, da Rocha Filho, Geraldo Narciso, da Conceição, Leyvison Rafael Vieira

“…[Display omitted] •Nickel ferrite doped with MoO3 as a novel solid acid catalyst.•Biodiesel production using waste cooking oil through acid magnetic solid…”
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Novel core‐shell nanocomposites based on TiO2‐covered magnetic Co3O4 for biomedical applications by Tonelli, Amanda M., Venturini, Janio, Arcaro, Sabrina, Henn, Jeferson G., Moura, Dinara J., Viegas, Alexandre da Cas, Bergmann, Carlos P.

“…Magnetic Co3O4 nanoparticles (NPs) have great potential for applications in biomedicine, as contrast enhancement agents for magnetic resonance imaging, or for…”
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Role of the fuel stoichiometry and post-treatment temperature on the spinel inversion and magnetic properties of NiFe2O4 nanoparticles produced by solution combustion synthesis by Zampiva, Rúbia Young Sun, Kaufmann, Claudir Gabriel, Venturini, Janio, Moreira dos Santos, Leonardo, Harumi Yamashita, Gabrielli, da Cas Viegas, Alexandre, Anzanello, Michel J., ten Caten, Carla, Pérez Bergmann, Carlos, Kopp Alves, Annelise

“…[Display omitted] •Magnetically soft NiFe2O4 nanoparticles were produced by Solution Combustion Synthesis (SCS).•The sample produced in a fuel-short regime…”
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NaAlO2/CuFe2O4 as a novel basic magnetic heterogeneous catalyst for effective biodiesel production: Synthesis, characterization, and optimization via RSM-FCCD modeling approach by Santos, Hiarla Cristina Lima dos, Gonçalves, Matheus Arrais, da Silva Lima, Vicente, da Cas Viegas, Alexandre, Filho, Geraldo Narciso da Rocha, Conceição, Leyvison Rafael Vieira da

“…This research focus on the development of a novel and superior basic magnetic heterogeneous catalyst, using NaAlO2 as an active species supported in CuFe2O4 to…”
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Evaluation of in vitro cytotoxicity of superparamagnetic poly(thioether-ester) nanoparticles on erythrocytes, non-tumor (NIH3T3), tumor (HeLa) cells and hyperthermia studies by Mattos dos Santos, Paula Christina, Feuser, Paulo Emilio, Cardoso, Priscilla Barreto, Steiner, Bethina Trevisol, Córneo, Emily da Silva, Scussel, Rahisa, Viegas, Alexandre da Cas, Machado-de-Ávila, Ricardo Andrez, Sayer, Claudia, Hermes de Araújo, Pedro Henrique

“…Magnetic nanoparticles encapsulated in biocompatible and biodegradable polymeric matrices are promising materials for biomedical applications, such as…”
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Encapsulation of magnetic nickel nanoparticles via inverse miniemulsion polymerization by Romio, Ana Paula, Rodrigues, Heloísa H., Peres, Augusto, Da Cas Viegas, Alexandre, Kobitskaya, Elena, Ziener, Ulrich, Landfester, Katharina, Sayer, Claudia, Araújo, Pedro H. H.

“…In this work, the encapsulation of magnetic nickel nanoparticles in polyacrylamide particles was performed via inverse miniemulsion polymerization. The…”
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Quasi-one-dimensional nanostructured cobalt (Co) intercalated vanadium oxide (V2O5): Peroxovanadate sol gel synthesis and structural study by da Silva, Douglas Langie, Moreira, Eduardo Ceretta, Dias, Fábio Teixeira, Neves Vieira, Valdemar das, Brandt, Iuri Stefani, Cas Viegas, Alexandre da, Pasa, André Avelino

“…Nanostructured cobalt vanadium oxide (V2O5) xerogels spread onto crystalline Si substrates were synthesized via peroxovanadate sol gel route. The resulting…”
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Spin-Orbit Proximity Effect in Bi/Co Multilayer: The Role of Interface Scattering by Nonnig, Arthur Casa Nova, Viegas, Alexandre da Cas, da Rosa, Fabiano Mesquita, Pureur, Paulo, Tumelero, Milton Andre

“…The Spin-Orbit Proximity Effect is the raise of Spin-Orbit Coupling at a layer near to the interface with a strong spin-orbit material. It has been seen in…”
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Spin–orbit proximity effect in Bi/Co multilayer: The role of interface scattering by Nonnig, Arthur Casa Nova, Viegas, Alexandre da Cas, da Rosa, Fabiano Mesquita, Pureur, Paulo, Tumelero, Milton Andre

“…The spin–orbit proximity effect is the raise of spin–orbit coupling at a layer near to the interface with a strong spin–orbit material. It has been seen in…”
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Encapsulation of magnetic nanoparticles in poly(methyl methacrylate) by miniemulsion and evaluation of hyperthermia in U87MG cells by Feuser, Paulo Emilio, Bubniak, Lorena dos Santos, Silva, Maria Claudia dos Santos, Viegas, Alexandre da Cas, Castilho Fernandes, Andrielle, Ricci-Junior, Eduardo, Nele, Marcio, Tedesco, Antônio Claudio, Sayer, Claudia, de Araújo, Pedro Henrique Hermes

“…[Display omitted] •Magnetic nanoparticles (MNPs) were encapsulated by MMA miniemulsion polymerization.•Stable and monomodal MNPs-PMMA dispersion in aqueous…”
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Simultaneous encapsulation of magnetic nanoparticles and zinc phthalocyanine in poly(methyl methacrylate) nanoparticles by miniemulsion polymerization and in vitro studies by Feuser, Paulo Emilio, Fernandes, Andrielle Castilho, Nele, Marcio, Viegas, Alexandre da Cas, Ricci-Junior, Eduardo, Tedesco, Antônio Claudio, Sayer, Claudia, de Araújo, Pedro Henrique Hermes

“…The application of photodynamic therapy and hyperthermia together in a drug delivery system with controlled release designed to work synergistically may lead…”
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Novel core-shell nanocomposites based on TiO 2 -covered magnetic Co 3 O 4 for biomedical applications by Tonelli, Amanda M, Venturini, Janio, Arcaro, Sabrina, Henn, Jeferson G, Moura, Dinara J, Viegas, Alexandre da Cas, Bergmann, Carlos P

“…Magnetic Co O nanoparticles (NPs) have great potential for applications in biomedicine, as contrast enhancement agents for magnetic resonance imaging, or for…”
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