Search Results - "Pereira, Claudete Fernandes"

A comparative study of calibration transfer methods for determination of gasoline quality parameters in three different near infrared spectrometers by Pereira, Claudete Fernandes, Pimentel, Maria Fernanda, Galvão, Roberto Kawakami Harrop, Honorato, Fernanda Araújo, Stragevitch, Luiz, Martins, Marcelo Nascimento

“…This work presents a comparative study of calibration transfer among three near infrared spectrometers for determination of naphthenes and RON (Research Octane…”
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Authenticity assessment of banknotes using portable near infrared spectrometer and chemometrics by da Silva Oliveira, Vanessa, Honorato, Ricardo Saldanha, Honorato, Fernanda Araújo, Pereira, Claudete Fernandes

“…[Display omitted] •Employment of a portable NIR instrument for authenticity assessment of banknotes.•SIMCA and SPA-LDA models to identify counterfeit and…”
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In-line monitoring of the transesterification reactions for biodiesel production using NIR spectroscopy by de Lima, Suzana Moreira, Silva, Bárbara Furtado Alves, Pontes, Dácio Vieira, Pereira, Claudete Fernandes, Stragevitch, Luiz, Pimentel, Maria Fernanda

“…•In-line NIR monitoring of the transesterification reactions for biodiesel production.•Methyl ester, mono-, di- and triglycerides contents predicted by PLS and…”
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Screening analysis to detect adulteration in diesel/biodiesel blends using near infrared spectrometry and multivariate classification by Pontes, Márcio José Coelho, Pereira, Claudete Fernandes, Pimentel, Maria Fernanda, Vasconcelos, Fernanda Vera Cruz, Silva, Alinne Girlaine Brito

“…This paper proposes an analytical method to detect adulteration of diesel/biodiesel blends based on near infrared (NIR) spectrometry and supervised pattern…”
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Using near-infrared overtone regions to determine biodiesel content and adulteration of diesel/biodiesel blends with vegetable oils by de Vasconcelos, Fernanda Vera Cruz, de Souza, Paulo Fernandes Barbosa, Pimentel, Maria Fernanda, Pontes, Márcio José Coelho, Pereira, Claudete Fernandes

“…[Display omitted] ► We describe a systematic study of NIR overtone regions to determine biodiesel. ► Potential adulteration with vegetable oil in diesel blends…”
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A modification of the successive projections algorithm for spectral variable selection in the presence of unknown interferents by Soares, Sófacles Figueredo Carreiro, Galvão, Roberto Kawakami Harrop, Araújo, Mário César Ugulino, Silva, Edvan Cirino da, Pereira, Claudete Fernandes, Andrade, Stéfani Iury Evangelista de, Leite, Flaviano Carvalho

“…This work proposes a modification to the successive projections algorithm (SPA) aimed at selecting spectral variables for multiple linear regression (MLR) in…”
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Near-Infrared Spectropolarimetry Based on Acousto-Optical Tunable Filters by Pereira, Claudete Fernandes, Gonzaga, Fabiano Barbieri, Pasquini, Celio

“…A new approach to near-infrared (NIR) spectropolarimetry is described, in which the properties of a noncollinear acousto-optical tunable filter (AOTF) made of…”
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Determination of Se(IV) by anodic stripping voltammetry using gold electrodes made from recordable CDs by Pereira, Claudete Fernandes, Gonzaga, Fabiano Barbieri, Guaritá-Santos, Antonio Moraes, SouzaDe, Jurandir Rodrigues

“…This work presents a simple, reproducible and low cost method, employing differential pulse anodic stripping voltammetry, for determination of selenium(IV). A…”
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Development of an Automatic Electrochemical System for Differential Pulse Amperometry and Its Application for Se(IV) Determination by Gonzaga, Fabiano Barbieri, Pereira, Claudete Fernandes, Guaritá-Santos, Antonio José Moraes, Souza De, Jurandir Rodrigues

“…This work presents the development of an automatic system for differential pulse amperometry (DPA) with electrochemical deposition. The system consists of a…”
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Quantification of biodiesel and adulteration with vegetable oils in diesel/biodiesel blends using portable near-infrared spectrometer by Paiva, Eduardo Maia, Rohwedder, Jarbas José Rodrigues, Pasquini, Celio, Pimentel, Maria Fernanda, Pereira, Claudete Fernandes

“…•Portable NIR spectrometer was used to quantify biodiesel and vegetable oil in diesel.•Performance of the portable NIR spectrometer was compared with the…”
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Portable near-infrared instruments: Application for quality control of polymorphs in pharmaceutical raw materials and calibration transfer by da Silva, Vitor Hugo, da Silva, Jailson José, Pereira, Claudete Fernandes

“…•Evaluation of three portable NIR instruments for quantifying MBZ polymorphs.•Comparative study to NIR benchtop instrument for quantifying MBZ…”
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Red wines from South America: Content of phenolic compounds and chemometric distinction by origin by Belmiro, Tailândia Maracajá Canuto, Pereira, Claudete Fernandes, Paim, Ana Paula Silveira

“…With the purpose of evaluating the wine grouping according to phenolic composition and geographical origin, eight individual phenolics were quantified in South…”
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Low-frequency Raman spectrophotometer with wide laser illumination on the sample: A tool for pharmaceutical analytical analysis by Paiva, Eduardo Maia, Ribessi, Rafael Luis, Pereira, Claudete Fernandes, Rohwedder, Jarbas José Rodrigues

“…This work describes an optical configuration for a Raman spectrophotometer, which permits variation of the laser spot size from 3 to 3000 μm, maintaining a…”
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Espectroscopia de correlação bidimensional: fundamentos, aplicações e perspectivas by Pereira, Claudete Fernandes, Pasquini, Celio

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Method for building a portable near infrared photometer based on LEDs and interference filters chosen by a spectral variable selection algorithm by Paiva, Eduardo Maia, Rohwedder, Jarbas José Rodrigues, Pasquini, Celio, Pereira, Claudete Fernandes

“…A new procedure is described for the development of photometers that operate in the NIR spectral region. The instrument was based on a set of LEDs as radiation…”
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Multivariate Optimization: A Powerful Tool for the Systematic Control of Quantum Dots Properties by Viegas, Isabelle Moraes Amorim, de Lima Pereira, Giovannia Araujo, Fernandes Pereira, Claudete

“…In this chapter, we present some chemometric tools used in the area of experimental design and multivariate optimization. To make the subject more…”
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A Flow System for Generation of Concentration Perturbation in Two-Dimensional Correlation Near-Infrared Spectroscopy: Application to Variable Selection in Multivariate Calibration by Pereira, Claudete Fernandes, Pasquini, Celio

“…A flow system is proposed to produce a concentration perturbation in liquid samples, aiming at the generation of two-dimensional correlation near-infrared…”
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Near Infrared Spectroscopy: Highlighting Brazil by Pereira, Claudete Fernandes

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Prediction of properties of diesel/biodiesel blends by infrared spectroscopy and multivariate calibration by de Fátima Bezerra de Lira, Liliana, de Vasconcelos, Fernanda Vera Cruz, Pereira, Claudete Fernandes, Paim, Ana Paula Silveira, Stragevitch, Luiz, Pimentel, Maria Fernanda

“…Partial least squares models (PLS) using near and middle infrared spectrometry were developed to predict quality parameters of diesel/biodiesel blends…”
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Comprehensive near infrared study of Jatropha oil esterification with ethanol for biodiesel production by Oliveira, Alianda Dantas de, Sá, Ananda Franco de, Pimentel, Maria Fernanda, Pacheco, José Geraldo A., Pereira, Claudete Fernandes, Larrechi, Maria Soledad

“…This work presents a comprehensive near infrared study for in-line monitoring of the esterification reaction of high acid oils, such as Jatropha curcas oil,…”
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