Search Results - "ARAÚJO, Mário C. U."

Electrochemical study of ricin at glassy carbon electrode by Ribeiro, Williame F, da Costa, Daniel J E, Lourenço, Anabel S, Lopes, Ilanna C, de Medeiros, Everaldo P, Salazar-Banda, Giancarlo R, do Nascimento, Valberes B, de Araújo, Mário C U

“…Ricin, Ricinus communis agglutinin 60 - RCA 60, is a deadly phytotoxic protein which inhibits ribosomes (class II), and there is no known effective antidote in…”
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Carbon Dots from Pilosocereus gounellei for Fluorimetric Determination of Tannin in Tea Using a Flow-Batch System by Silva, Kelly, Andrade, Stéfani, Lima, Marcelo, Monte-Filho, Severino, Araújo, Mário, Lima, Ricardo

“…In this study, xiquexique (Pilosocereus gounellei) native endemic cactus from the Brazilian semiarid was used for the first time as a natural carbon source…”
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Flow–batch miniaturization by Monte-Filho, Severino S., Lima, Marcelo B., Andrade, Stéfani I.E., Harding, David P., Fagundes, Yebá N.M., Santos, Sergio R.B., Lemos, Sherlan G., Araújo, Mario C.U.

“…This study introduces the first micro-flow–batch analyzer (μFBA). A simple, low-cost, deep urethane–acrylate photo-resist ultraviolet-lithographic technique…”
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Modified microelectrodes and multivariate calibration for flow injection amperometric simultaneous determination of ascorbic acid, dopamine, epinephrine and dipyrone by Matos, R C, Angnes, L, Araújo, M C, Saldanha, T C

“…Flow injection amperometric quantification of ascorbic acid (AA), dopamine (DA), epinephrine (EP) and dipyrone (DI) in mixtures (in the microgram g-1 range)…”
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A micro-flow-batch analyzer with solenoid micro-pumps for the photometric determination of iodate in table salt by Lima, Marcelo B., Barreto, Inakã S., Andrade, Stéfani Iury E., Almeida, Luciano F., Araújo, Mário C.U.

“…In this study, a micro-flow-batch analyzer (μFBA) with solenoid micro-pumps for the photometric determination of iodate in table salt is described. The method…”
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An Active Search Method for Finding Objects with Near-Optimal Property Values within a Given Set by Matta, Cláudia E. da, Paiva, Henrique M., Galvão, Roberto K. H., Araújo, Mário C. U., Soares, Sófacles F. C., Weber, Karen C., Pinto, Luiz A.

“…This paper proposes an active search method aimed at finding objects with optimal or near-optimal y-property values, on the basis of x-variables obtained by…”
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An automatic flow system for NIR screening analysis of liquefied petroleum gas with respect to propane content by Dantas, Hebertty V., Barbosa, Mayara F., Nascimento, Elaine C.L., Moreira, Pablo N.T., Galvão, Roberto K.H., Araújo, Mário C.U.

“…This paper proposes a NIR spectrometric method for screening analysis of liquefied petroleum gas (LPG) samples. The proposed method is aimed at discriminating…”
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Turbidimetric and photometric determination of total tannins in tea using a micro-flow-batch analyzer by Lima, Marcelo B., Andrade, Stéfani I.E., Harding, David P., Pistonesi, Marcelo F., Band, Beatriz S.F., Araújo, Mário C.U.

“…► The development of a micro-flow-batch analyzer (μFBA). ► The system was applied to turbidimetric and photometric determination of total tannins in samples of…”
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Non-Destructive NIR Spectrometric Cultivar Discrimination of Castor Seeds Resulting from Breeding Programs by Santos, Maria B. H., Gomes, Adriano A., Vilar, Welma T. S., Almeida, Pollyne B. A., Milani, Máira, Nóbrega, Márcia B. M., Medeiros, Everaldo P., Galvão, Roberto K. H., Araújo, Mário C. U.

“…This article proposes a near-infrared (NIR) diffuse reflectance spectrometric method for non-destructive discrimination of castor seeds from the two cultivars…”
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Microcystin-LR and chemically degraded microcystin-LR electrochemical oxidation by Lopes, Ilanna C, Santos, Paulina V F, Diculescu, Victor C, Peixoto, Francisco M P, Araújo, Mário C U, Tanaka, Auro A, Oliveira-Brett, Ana Maria

“…Microcystins (MCs) are cyclic hepatotoxic heptapeptides produced by certain strains of freshwater cyanobacteria toxic for humans and animals. The…”
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A Monosegmented Flow Titration for the Spectrophotometric Determination of Total Acidity in Vinegar by HONORATO, Ricardo S., ARAÚJO, Mário C. U., VERAS, Germano, ZAGATTO, Elias A. G., LAPA, Rui A. S., José L. F. C. LIMA

“…A monosegmented flow system involving sample and titrant sequential injections and the establishment of a tandem plug between two air bubbles is proposed for…”
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One-step microwave-assisted synthesis of fluorescent carbon quantum dots for determination of ascorbic acid and riboflavin in vitamin supplements by do Nascimento, Wallis C., Ramo, Luciano B., da Silva, Fausthon F., C. U. Araujo, Mario, I. E. de Andrade, Stéfani, Bichinho, Kátia M.

“…[Display omitted] •A simple method for quality control of ascorbic acid and riboflavin in vitamin supplements.•Carbon quantum dots synthesized using a fast,…”
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Photometric determination of phosphorus in mineralized biodiesel using a micro-flow-batch analyzer with solenoid micro-pumps by Lima, Marcelo B., Barreto, Inakã S., Andrade, Stéfani Iury E., Neta, Maria S.S., Almeida, Luciano F., Araújo, Mário C.U.

“…A method for the determination of phosphorus in mineralized biodiesel using a micro-flow-batch analyzer (μFBA) with solenoid micro-pumps was proposed. The…”
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Differentiation of cumin seeds using a metal-oxide based gas sensor array in tandem with chemometric tools by Ghasemi-Varnamkhasti, Mahdi, Amiri, Zahra Safari, Tohidi, Mojtaba, Dowlati, Majid, Mohtasebi, Seyed Saeid, Silva, Adenilton C., Fernandes, David D.S., Araujo, Mário C.U.

“…Cumin is a plant of the Apiaceae family (umbelliferae) which has been used since ancient times as a medicinal plant and as a spice. The difference in the…”
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Simultaneous determination of hydroquinone, resorcinol, phenol, m-cresol and p-cresol in untreated air samples using spectrofluorimetry and a custom multiple linear regression-successive projection algorithm by Pistonesi, Marcelo F., Di Nezio, María S., Centurión, María E., Lista, Adriana G., Fragoso, Wallace D., Pontes, Márcio J.C., Araújo, Mário C.U., Band, Beatriz S. Fernández

“…In this study, a novel, simple, and efficient spectrofluorimetric method to determine directly and simultaneously five phenolic compounds (hydroquinone,…”
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Determination of Coumarin in Mikania glomerata Infusions by Square-Wave Voltammetry Using a Boron-Doped Diamond Electrode by Nóbrega, Denise, Lourenço, Anabel, Fernandes, David Douglas, Lyra, Wellington, Moreira, Edilene, Diniz, Paulo Henrique, Araújo, Mario

“…Infusions of Mikania glomerata Sprengel (guaco) leaves are used in Brazil for the treatment of respiratory diseases. Coumarin is the chemical marker of guaco…”
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Automatic determination of chlorine without standard solutions using a biamperometric flow-batch analysis system by Nascimento, Valberes B., Selva, Thiago M.G., Coelho, Elaine C.S., Santos, Francyana P., Antônio, Jadielson L.S., Silva, José R., Gaião, Edvaldo N., Araújo, Mário C.U.

“…This study presents an automatic analysis system that does not require the use of standard solutions. The system uses an electrochemical flow cell for in line…”
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Voltammetric determination of tartaric acid in wines by electrocatalytic oxidation on a cobalt(II)-phthalocyanine-modified electrode associated with multiway calibration by Lourenço, Anabel S., Nascimento, Raphael F., Silva, Amanda C., Ribeiro, Williame F., Araujo, Mario C.U., Oliveira, Severino C.B., Nascimento, Valberes B.

“…The electrocatalytic oxidation of tartaric acid on a carbon paste electrode modified with cobalt (II)-phthalocyanine was demonstrated and applied to the…”
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Flow injection determination of metronidazole through spectrophotometric measurement of the nitrite ion produced upon alkaline hydrolysis by Simões, Simone S., Medeiros, Everaldo P., Gaião, Edvaldo N., Lyra, Wellington S., Moreira, Pablo N. T., Araújo, Mario C. U., Silva, Edvan C., Nascimento, Valberes B.

“…A new method for metronidazole determination, based on spectrometric monitoring of a diazonium salt produced in-line by alkaline hydrolysis released nitrite…”
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Ant colony optimization for variable selection in discriminant linear analysis by Pontes, Aline S., Araújo, Alisson, Marinho, Weverton, Gonçalves Dias Diniz, Paulo H., Araújo Gomes, Adriano, Goicoechea, Hector C., Silva, Edvan C., Araújo, Mario C.U.

“…A new algorithm using ant colony optimization (ACO) for selection of variables in linear discriminant analysis (LDA) is presented. The role of ACO is explored…”
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