Search Results - "D’ávila, Luiz Antonio"

Determination of the Biodiesel Content on Biodiesel/Diesel Blends and Their Adulteration with Vegetable Oil by High-Performance Liquid Chromatography by de Matos, Taís Santana, dos Santos, Rafael Cavalcante, de Souza, Cristiane Gimenes, de Carvalho, Renato Carneiro, de Andrade, Débora França, D’ávila, Luiz Antonio

“…Biodiesel content on biodiesel/diesel blends is obtained by determining the band intensity of CO bond in the fatty acid methyl esters (FAME) of the biodiesel…”
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Palygorskite and solvatochromic dye in solid-state colorimetric devices for rapid assessment of the amount of water in ethanol fuel by de Souza, Cristiane G., dos Santos, Rafael C., Bertolino, Luiz Carlos, de Andrade, Débora F., d´Avila, Luiz Antonio, Spinelli, Luciana

“…This study presents a novel method for quantitatively determining water content in fuel ethanol utilizing a colorimetric device composed of the methylene blue…”
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Free glycerol determination in biodiesel samples using palladium nanoparticles modified glassy carbon electrode associated with solid phase extraction by Honório, Gláucio Gualtieri, da Cunha, Jéssica Nogueira, dos Santos Castro Assis, Kelly Leite, de Aguiar, Paula Fernandes, de Andrade, Débora França, de Souza, Cristiane Gimenes, d’Avila, Luiz Antonio, Archanjo, Braulio S., Achete, Carlos A., Pradelle, Renata Norah Chaar, Turkovics, Franck, Neto, Rafael Serralvo, D’Elia, Eliane

“…In this work, we developed a method for the quantification of free glycerol in biodiesel using electrochemical detection and solid phase extraction (SPE). SPE…”
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Analysis and Quantitation of Fatty Acid Methyl Esters in Biodiesel by High-Performance Liquid Chromatography by Gimenes de Souza, Cristiane, Torres de Araújo, Mayara, Cavalcante dos Santos, Rafael, França de Andrade, Débora, Vasconcello da Silva, Bárbara, d′Avila, Luiz Antonio

“…The aim of this study was to compare two methods for determining the fatty acid methyl ester content of biodiesel by applying high-performance liquid…”
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Comparison Between Methyl and Trimethylsilyl Ester Derivatives in the Separation and GC Quantification of Triterpene Acids in Eugenia brasiliensis Leaf Extract by Lima, Adélia Mara Belém, d’Avila, Luiz Antonio, Siani, Antonio Carlos

“…This study details a method to characterize the triterpene acid-rich extract obtained from the defatted leaves of Eugenia brasiliensis (Myrtaceae) via…”
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Characterization of fuel detergent–dispersant additives by thermogravimetry by dos Santos, Amanda Pereira Franco, da Silva, Kissya Kropf, d’ Avila, Luiz Antonio, Dweck, Jo

“…Detergent–dispersant additized gasoline helps to keep engines clean, inhibits the formation of gum and sludge in the combustion process, and reduces the…”
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Kinetic Modeling of the Effect of Antioxidant Additives on Biodiesel Oxidation Stability by Souza, Vinícius Marcenes Gonçalves de, d’Avila, Luiz Antonio

“…Biodiesel oxidation stability is a major concern for this product. Antioxidants are added to the biofuel to prevent its degradation that can cause filters to…”
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Rapid test to analyze bonded glycerin in biodiesel by solid-phase extraction and digital image processing by Assunção Brito, Breno, Fendt Gonçalves Silva, Carolina, Gimenes de Souza, Cristiane, de Oliveira Muniz, Renan, França de Andrade, Débora, Antonio d’Avila, Luiz

“…[Display omitted] •Development of a rapid test for analyzing glycerin combined in biodiesel using image recognition.•Validation of the developed methodology…”
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Quantification of detergent-dispersant additives in gasoline by thermogravimetry by dos Santos, Amanda Pereira Franco, da Silva, Kissya Kropf, Dweck, Jo, d’Avila, Luiz Antonio

“…•Quantification of detergent-dispersant additives in gasoline by thermogravimetry.•The method is simpler and more cost-effective than any other found in the…”
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Quantitative analysis of free glycerol in biodiesel using solid-phase extraction and high-performance liquid chromatography by de Almeida Cozendey, Daniel, de Oliveira Muniz, Renan, Cavalcante dos Santos, Rafael, Gimenes de Souza, Cristiane, França de Andrade, Débora, Antonio d'Avila, Luiz

“…[Display omitted] •Application of liquid chromatography for analysis of free glycerol in biodiesel.•Estimation of errors and quantitative parameters for…”
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Quantification of detergent-dispersant additives in gasoline by size-exclusion chromatography and thermogravimetry by dos Santos, Amanda Pereira Franco, da Silva, Kissya Kropf, Dweck, Jo, d'Avila, Luiz Antonio

“…The use of detergent-dispersant additives in gasoline helps keep engines clean, inhibits the formation of gum and sludge in the combustion process, and reduces…”
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Simultaneous Analysis of Mono‐, Di‐, Triacylglycerols, and Fatty Acid Methyl Esters in Biodiesel by Size‐Exclusion Chromatography by da Costa, Roberta Perroni Marouço, Souza, Cristiane Gimenes, dos Santos, Rafael Cavalcante, Andrade, Débora França, Antonio d'Avila, Luiz

“…The purpose of this study is to develop and validate a method based on size‐exclusion chromatography (SEC) for the simultaneous determination of fatty acid…”
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Approaching Diesel Fuel Quality in Chemistry Lab Classes: Undergraduate Student’s Achievements on Determination of Biodiesel Content in Diesel Oil Applying Solvatochromic Effect by Cavalcante dos Santos, Rafael, Cabral Cavalcanti, Juliane Natalizi, Werneck do Carmo, Elisa Carneiro, de Souza, Fernando Costa, Soares, Wesley Garcia, Gimenes de Souza, Cristiane, França de Andrade, Débora, d’Avila, Luiz Antonio

“…An experimental procedure is presented that was developed by fifth-year chemical engineering and industrial chemistry undergraduates at the Federal University…”
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Simultaneous analysis of esters and acylglycerols in biodiesel by high-performance liquid chromatography with refractive index detection by dos Santos, Bruno Lima, da Silva, Kissya Kropf, dos Santos, Amanda Pereira Franco, de Andrade, Débora França, d'Avila, Luiz Antonio

“…Currently, gas chromatography (GC) is the most widely used analytical technique to verify the quality of biodiesel in relation to its glyceride and fatty acid…”
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Selective and cost-effective protocol to separate bioactive triterpene acids from plant matrices using alkalinized ethanol: Application to leaves of Myrtaceae species by Lima, Adélia M Belem, Siani, Antonio Carlos, Nakamura, Marcos Jun, D'Avila, Luiz Antonio

“…Triterpenes as betulinic (BA), oleanolic (OA) and ursolic acids (UA) have increasingly gained therapeutic relevance due to their wide scope of pharmacological…”
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Performance comparison between broilers positive and negative for antibodies against the chicken anemia virus by Rubin, Lauricio Librelotto(Universidade Federal do Rio Grande do Sul Faculdade de Medicina Veterinária Centro de Diagnóstico e Pesquisa em Patologia Aviária), Ávila, Luiz Antônio Faccenda de(Universidade Federal do Rio Grande do Sul Faculdade de Medicina Veterinária Centro de Diagnóstico e Pesquisa em Patologia Aviária), Ribeiro, Andréa Machado Leal(Universidade Federal do Rio Grande do Sul Faculdade de Medicina Veterinária Centro de Diagnóstico e Pesquisa em Patologia Aviária), Wald, Vera(Universidade Federal do Rio Grande do Sul Faculdade de Medicina Veterinária Centro de Diagnóstico e Pesquisa em Patologia Aviária), Canal, Cláudio Wageck(Universidade Federal do Rio Grande do Sul Faculdade de Medicina Veterinária Centro de Diagnóstico e Pesquisa em Patologia Aviária)

“…The chicken anemia virus (CAV) is present in virtually every country investigated, Brazil including. The aim of this study was to determine what the difference…”
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Análise comparativa da concentração industrial e de turnover da indústria farmacêutica no Brasil para os segmentos de medicamentos de marca e genéricos by Rosenberg, Gerson, Fonseca, Maria da Graça Derengowski, d' Avila, Luiz Antonio

“…Este artigo analisa a evolução da estrutura do segmento de medicamentos de marca e genéricos no Brasil a partir de 1997. Após a entrada dos medicamentos…”
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Chromatographic Models as Tools for Scale-up of Isolation of Natural Products by Semi-preparative HPLC by Mazzei, José Luiz, Antonio d'Avila, Luiz

“…Scale-up of high performance liquid chromatography (HPLC) using mathematical models has been found in the literature for separation of binary mixtures or…”
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Determination of ethanol in gasoline by high-performance liquid chromatography by Avila, Lorena Morine, dos Santos, Amanda Pereira Franco, de Mattos, Danielle Ignácio Mançano, de Souza, Cristiane Gimenes, de Andrade, Débora França, d'Avila, Luiz Antonio

“…This study employed non-aqueous reversed-phase high-performance liquid chromatography (HPLC) with refractive-index detection and methanol as a mobile phase to…”
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Multicriteria mapping of stakeholder preferences for the sustainability of the Brazilian program for biodiesel production and use by Mendes, Pietro A.S., Barros, Allan Kardec, d'Avila, Luiz Antonio, Antunes, Adelaide M.

“…The aim of this article is to prioritize the factors and alternatives relating to the reference conditions for the biodiesel production chain for the Brazilian…”
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