Search Results - "Gomes Teixeira, Leonardo Sena"

Catalysts for glycerol hydrogenolysis to 1,3-propanediol: A review of chemical routes and market by da Silva Ruy, Alisson Dias, de Brito Alves, Rita Maria, Reis Hewer, Thiago Lewis, de Aguiar Pontes, Danilo, Gomes Teixeira, Leonardo Sena, Magalhães Pontes, Luiz Antônio

“…[Display omitted] •1,3-propanediol as a sustainable product obtained from biodiesel-derived glycerol hydrogenolysis.•Market and industrial routes for the…”
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A procedure for determination of cobalt in water samples after dispersive liquid–liquid microextraction by Baliza, Patrícia Xavier, Teixeira, Leonardo Sena Gomes, Lemos, Valfredo Azevedo

“…In this work, a procedure for preconcentration of cobalt using dispersive liquid–liquid microextraction (DLLME) with the reagent Br-TAO as complexing reagent…”
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Hypertension and Salt-Restrictive Diet Promotes Low Urinary Iodine Concentration in High-Risk Pregnant Women: Results from a Cross-Sectional Study Conducted After Salt Iodination Reduction in Brazil by Sant’Ana Leone de Souza, Luciana, de Oliveira Campos, Renata, dos Santos Alves, Vitor, Cerqueira, Taíse Lima Oliveira, da Silva, Thiago Magalhães, Teixeira, Leonardo Sena Gomes, Feitosa, Alina Coutinho Rodrigues, de Aragão Dantas Alves, Crésio, Ramos, Helton Estrela

“…During pregnancy, the demand for daily iodine increases by 50–70% which occurs to reach around 250 μg/day. Limited information is available on the association…”
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New Materials for Solid-Phase Extraction of Trace Elements by Lemos, Valfredo Azevedo, Teixeira, Leonardo Sena Gomes, Bezerra, Marcos de Almeida, Costa, Antonio Celso Spínola, Castro, Jacira Teixeira, Cardoso, Luiz Augusto Martins, de Jesus, Djane Santiago, Santos, Elenir Souza, Baliza, Patrícia Xavier, Santos, Luana Novaes

“…The development of new sorbents and their application in preconcentration methods for determination of trace elements is a subject of great interest. This…”
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Application of pyridylazo and thiazolylazo reagents in flow injection preconcentration systems for determination of metals by Baliza, Patrícia Xavier, Ferreira, Sérgio Luis Costa, Teixeira, Leonardo Sena Gomes

“…Pyridylazo and thiazolylazo reagents are synthetic dyes widely used in analytical chemistry. These reagents are also very attractive for use in…”
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Iodine nutritional status in Brazil: a meta-analysis of all studies performed in the country pinpoints to an insufficient evaluation and heterogeneity by Campos, Renata de Oliveira, Barreto, Iasmin dos Santos, Maia, Lorena Rejane de Jesus, Rebouças, Sara Cristina Lima, Cerqueira, Taíse Lima de Oliveira, Oliveira, Clotilde Assis, Santos, Carlos Antônio de Souza Teles, Mendes, Carlos Maurício Cardeal, Teixeira, Leonardo Sena Gomes, Ramos, Helton Estrela

“…Iodine deficiency disorder (IDD) is the result of an inadequate dietary intake of iodine, which physiological consequences are endemic goiter and thyroid…”
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Determination of Vitamin B6 in pharmaceutical formulations by flow injection-solid phase spectrophotometry by GUSMAO PORTELA, Jicarla, CELSO SPINOLA COSTA, Antonio, SENA GOMES TEIXEIRA, Leonardo

“…In this work, a new solid phase spectrophotometric method in association with flow injection analysis for Vitamin B6 (pyridoxine) determination has been…”
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Determination of copper, iron, nickel and zinc in ethanol fuel by energy dispersive X-ray fluorescence after pre-concentration on chromatography paper by Teixeira, Leonardo Sena Gomes, Santos, Elenir Souza, Nunes, Luana Sena

“…[Display omitted] ► A procedure is proposed for analyzing metal ions in ethanol fuel samples by EDXRF after a preconcentration step. ► The preconcentration…”
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Applications of emulsified systems in elemental analysis by spectroanalytical techniques by Valasques, Gisseli Souza, dos Santos, Ana Maria Pinto, Teixeira, Leonardo Sena Gomes, da Mata Cerqueira, Uillian Mozart Ferreira, de Souza, Valdinei Santos, Bezerra, Marcos Almeida

“…Emulsified systems are characterized by an immiscible liquid dispersed in another liquid in the form of droplets. These systems can be classified according to…”
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Iodine Nutritional Status in Schoolchildren from Public Schools in Brazil: A Cross-Sectional Study Exposes Association with Socioeconomic Factors and Food Insecurity by Campos, Renata de Oliveira, Reboucas, Sara Cristina Lima, Beck, Rebeca, de Jesus, Lorena Rejane Maia, Ramos, Yanne Rocha, Barreto, Iasmin Dos Santos, Marques, Tamires Xavier, Cerqueira, Taise Lima Oliveira, Santos, William Alves, Oliveira, Clotilde Assis, Teixeira, Leonardo Sena Gomes, Souza, Vanessa Cristina de Oliveira, Barbosa, Jr, Fernando, Ramos, Helton Estrela

“…National programs of salt iodization were implemented in Brazil to combat iodine deficiency (ID) in children of school age. Currently, there are limited data…”
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Catalytic conversion of glucose into sorbitol over niobium oxide supported Ru catalysts by Silva, Jordan Gonzaga Andrade Batista, Santos, Ronaldo Costa, Rodríguez-Castellón, Enrique, Teixeira, Leonardo Sena Gomes, Pontes, Luiz Antônio Magalhães

“…[Display omitted] •Ru/Nb2O5 catalysts for hydrogenation of glucose into sorbitol.•Influence of the Nb2O5 phase on the catalytic properties of the Ru/Nb2O5…”
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Analytical strategies for spectrometric determination of vanadium in samples of interest in the petroleum industry by de Souza, Valdinei Santos, Sena Gomes Teixeira, Leonardo, Sthefane, Joaly, Lima, Santos Oliveira, Ferreira da Mata Cerqueira, Uillian Mozart, Cordeiro de Oliveira, Olívia Maria, Queiroz, Antonio Fernando de Souza, Almeida Bezerra, Marcos

“…Vanadium is a trace metal that is found in crude oil and its derivatives, in water from oil production, and in rocks. Methods to determine the amount of…”
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Comparison of Spectrophotometric Methods for the Determination of Copper in Sugar Cane Spirit by Soares, Sarah Adriana R, Costa, Silvânio Silvério L, Araujo, Rennan Geovanny O, Teixeira, Leonardo Sena Gomes, Dantas, Alailson Falcão

“…Three spectrophotometric methods were developed for the determination of copper (Cu) in sugar cane spirit using the chromogenic reagents neocuproine,…”
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Development of a new sequential injection in-line cloud point extraction system for flame atomic absorption spectrometric determination of manganese in food samples by Lemos, Valfredo Azevedo, Baliza, Patrícia Xavier, de Carvalho, Anaildes Lago, Oliveira, Rafael Vasconcelos, Teixeira, Leonardo Sena Gomes, Bezerra, Marcos Almeida

“…A preconcentration method for manganese determination by sequential injection cloud point extraction with subsequent detection by flame atomic absorption…”
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Solid phase spectrophotometry for the determination of cobalt in pharmaceutical preparations by SENA GOMES TEIXEIRA, Leonardo, SPINOLA COSTA, Antonio Celso, ROSA ASSIS, Julio César, COSTA FERREIRA, Sérgio Luis, KORN, Mauro

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Screening analysis to detect adulterations in Brazilian gasoline samples using distillation curves by de Oliveira, Fabio Santos, Gomes Teixeira, Leonardo Sena, Ugulino Araujo, Mario Cesar, Korn, Mauro

“…Data on evaporated fraction temperatures obtained from the distillation curves of Brazilian gasolines were employed to identify adulterated samples by applying…”
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Palinofácies de uma seção aflorante de folhelhos da Formação Barreirinha (Devoniano), borda sul da Bacia do Amazonas, Brasil: implicações paleoambientais by Iasmine Maciel Silva Souza, Rodolfo Dino, Luzia Antonioli, Hélio Jorge Portugal Severiano Ribeiro, José Roberto Cerqueira, Consuelo Lima Navarro de Andrade, Karina Santos Garcia, Antônio Fernando de Souza Queiroz, Leonardo Sena Gomes Teixeira

“…O presente trabalho tem como objetivo estudar as palinofácies e o paleoambiente deposicional da Formação Barreirinha e sua relação com a geoquímica orgânica de…”
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Determination of Mo and V in multiphase gasoline emulsions by electrothermal atomic absorption spectrometry by Santana Sodré dos Santos, Denilson, Paixão Teixeira, Alete, das Graças Andrade Korn, Maria, Sena Gomes Teixeira, Leonardo

“…This paper proposes an alternative analytical method using electrothermal atomic absorption spectrometry to determine Mo and V in multiphase gasoline…”
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A utilização de etanol em célula a combustível de óxido sólido by Fiuza, Raigenis da Paz, Silva, Marcos Aurélio da, Pontes, Luiz Antônio Magalhães, Teixeira, Leonardo Sena Gomes, Boaventura, Jaime Soares

“…This work reports a review on the status and technical feasibility of the application of ethanol as fuel for Solid Oxide Fuel Cells (SOFC), presenting both…”
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Spectrophotometric determination of uranium using 2-(2- Thiazolylazo)-p-Cresol (TAC) in the presence of surfactants by Teixeira, Leonardo Sena Gomes, Costa, Antonio Celso Spínola, Ferreira, Sérgio Luís Costa, Freitas, Maria de Lourdes, Carvalho, Marcelo Souza de

“…A sensitive and selective spectrophotometric method is proposed for the rapid determination of uranium using 2-(2- Thiazolylazo)-p-Cresol (TAC). The reaction…”
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