Search Results - "ROHWEDDER, J. J. R"

Bismuth release from endodontic materials: in vivo analysis using Wistar rats by Marciano, M. A., Pelepenko, L. E., Francati, T. M., Antunes, T. B. M., Janini, A. C. P., Rohwedder, J. J. R., Shelton, R. M., Camilleri, J.

“…Calcium silicate-based materials are used to block the communication between the root canal and the periodontal ligament space. This brings the materials into…”
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Coupling Continuous Flow Microreactors to MicroNIR Spectroscopy: Ultracompact Device for Facile In-Line Reaction Monitoring by Galaverna, Renan, Ribessi, Rafael L, Rohwedder, Jarbas J. R, Pastre, Julio C

“…In this study, we applied a portable near-infrared spectrophotometer (MicroNIR) for in-line monitoring of the synthesis of 5-hydroxymethylfurfural (5-HMF) in a…”
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iHWG-μNIR: a miniaturised near-infrared gas sensor based on substrate-integrated hollow waveguides coupled to a micro-NIR-spectrophotometer by Rohwedder, J J R, Pasquini, C, Fortes, P R, Raimundo, I M, Wilk, A, Mizaikoff, B

“…A miniaturised gas analyser is described and evaluated based on the use of a substrate-integrated hollow waveguide (iHWG) coupled to a microsized near-infrared…”
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Silicone Sensing Phase for Detection of Aromatic Hydrocarbons in Water Employing Near-Infrared Spectroscopy by Albuquerque, Jackson S, Pimentel, M. Fernanda, Silva, Valdinete L, Raimundo, Ivo M, Rohwedder, Jarbas J. R, Pasquini, Celio

“…The use of silicone for detection of aromatic hydrocarbons in water using near-infrared spectroscopy is proposed. A sensing phase of poly(dimethylsiloxane)…”
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A PLS regression model using NIR spectroscopy for on-line monitoring of the biodiesel production reaction by Killner, Mario H.M., Rohwedder, Jarbas J.R., Pasquini, Celio

“…► NIR spectroscopy was applied online to monitor the soybean oil transesterification. ► PLS model was developed to predict the conversion of triglycerides to…”
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Simultaneous determination of methanol and ethanol in gasoline using NIR spectroscopy: Effect of gasoline composition by Fernandes, Heitor L., Jr, Ivo M. Raimundo, Pasquini, Celio, Rohwedder, Jarbas J.R.

“…Near infrared (NIR) spectroscopy was employed for simultaneous determination of methanol and ethanol contents in gasoline. Spectra were collected in the range…”
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Assessment of infrared spectroscopy and multivariate techniques for monitoring the service condition of diesel-engine lubricating oils by Caneca, Arnobio Roberto, Pimentel, M. Fernanda, Galvão, Roberto Kawakami Harrop, da Matta, Cláudia Eliane, de Carvalho, Florival Rodrigues, Raimundo, Ivo M., Pasquini, Celio, Rohwedder, Jarbas J.R.

“…This paper presents two methodologies for monitoring the service condition of diesel-engine lubricating oils on the basis of infrared spectra. In the first…”
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microfluidic device with integrated fluorimetric detection for flow injection analysis by Fonseca, Alexandre, Raimundo, Ivo M. Jr, Rohwedder, Jarbas J. R, Lima, Renato S, Araújo, Mário C. Ugulino

“…This work describes the development of flow analysis microsystems with integrated fluorimetric detection cells. Channels (width of 300-540 µm and depth of…”
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A compact Fourier-transform near-infrared spectrophotometer and chemometrics for characterizing a comprehensive set of seized ecstasy samples by Cavalcante, Jennifer A., Souza, Jamille C., Rohwedder, Jarbas J.R., Maldaner, Adriano O., Pasquini, Celio, Hespanhol, Maria C.

“…[Display omitted] •Near-infrared spectroscopy identifies and quantifies ecstasy seized samples.•Two level SIMCA classification minimizes the risk of forensic…”
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Construction and evaluation of a flow injection micro-analyser based on urethane–acrylate resin by Fonseca, Alexandre, Raimundo, Ivo M., Rohwedder, Jarbas J.R., Ferreira, Luiz Otávio S.

“…A flow injection micro-analyser with an integrated injection device and photometric detection is described. Channels measuring 205–295 μm depth by 265–290 μm…”
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Comparison of macro and micro Raman measurement for reliable quantitative analysis of pharmaceutical polymorphs by Paiva, Eduardo M., da Silva, Vitor H., Poppi, Ronei J., Pereira, Claudete F., Rohwedder, Jarbas J.R.

“…[Display omitted] •Analytical Quantitative Analysis.•Polymorph Analysis.•Raman Spectroscopy Analysis.•Quality Analysis. This work reports on the use of micro-…”
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Determination of detergent and dispensant additives in gasoline by ring-oven and near infrared hypespectral imaging by Rodrigues e Brito, Lívia, da Silva, Michelle P.F., Rohwedder, Jarbas J.R., Pasquini, Celio, Honorato, Fernanda A., Pimentel, Maria Fernanda

“…[Display omitted] A method using the ring-oven technique for pre-concentration in filter paper discs and near infrared hyperspectral imaging is proposed to…”
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Semiautomated solid-phase extraction manifold with a solvent-level sensor by Orlando, R.M., Rath, S., Rohwedder, J.J.R.

“…A semiautomated solid-phase extraction manifold for multiple extractions is presented. The manifold utilizes commercial solid-phase syringe cartridges and…”
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Synchrotron radiation X-Ray fluorescence at the LNLS: beamline instrumentation and experiments by Pérez, Carlos A., Radtke, Martin, Sánchez, Héctor J., Tolentino, Helio, Neuenshwander, Regis T., Barg, William, Rubio, Marcelo, Bueno, María Izabel Silveira, Raimundo, Ivo M., Rohwedder, Jarbas J. R.

“…The x‐ray fluorescence beamline of the Laboratorio Nacional de Luz Síncrotron (LNLS) is described. The main optical component of the beamline is a silicon…”
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Chloride-selective membrane electrodes and optodes based on an indium(III) porphyrin for the determination of chloride in a sequential injection analysis system by Pimenta, Adriana M., Araújo, Alberto N., Montenegro, Maria Conceição B.S.M., Pasquini, Celio, Rohwedder, Jarbas J.R., Raimundo, Ivo M.

“…Two quasi-independent methods for potentiometric and optical determination of chloride were simultaneously implemented in a flow system, providing real-time…”
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Determination of phosphate in natural water employing a monosegmented flow system with simultaneous multiple injection by Diniz, Maria Celeste Teixeira, Filho, Orlando Fatibello, de Aquino, Emerson Vidal, Rohwedder, Jarbas J.R.

“…A monosegmented flow system was employed for the determination of low contents of phosphate in natural water. In this approach, sample and reagents are…”
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Compact NMR spectroscopy for real-time monitoring of a biodiesel production by Killner, M.H.M., Garro Linck, Y., Danieli, E., Rohwedder, J.J.R., Blümich, B.

“…[Display omitted] •On-line monitoring of a transesterification reaction by compact 1H NMR spectroscopy.•Developed PLS models from NMR-spectra recorded at 1T to…”
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Flow-injection spectrophotometric multidetermination of metallic ions with a single reagent exploiting multicommutation and multidetection by Rocha, F R, Reis, B F, Rohwedder, J J

“…A flow system designed by computer-controlled discrete commutation devices is proposed for the multidetermination of metallic ions with a single chromogenic…”
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Quantification of Carbon Dioxide (CO2), Methane (CH4), and Nitrous Oxide (N2O) Using Near Infrared Spectroscopy and Multivariate Calibration in High Humidity Levels by Ribessi, Rafael, Jardim, Wilson, Rohwedder, Jarbas, Neves, Thiago

“…In this work we developed a promising analytical method combining Fourier transform nearinfrared (FT-NIR) spectroscopic technique and first-order multivariate…”
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Gran method for end point anticipation in monosegmented flow titration by Aquino, Emerson V, Pasquini, Celio, Rohwedder, Jarbas J. R, Raimundo Jr, Ivo M, Montenegro, M. Conceição B. S. M, Araújo, Alberto N

“…An automatic potentiometric monosegmented flow titration procedure based on Gran linearisation approach has been developed. The controlling program can…”
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