Search Results - "Barreto, Diandra Nunes"

Monitoring Ozone Using Portable Substrate-Integrated Hollow Waveguide-Based Absorbance Sensors in the Ultraviolet Range by Barreto, Diandra Nunes, Silva, Weida Rodrigues, Mizaikoff, Boris, da Silveira Petruci, João Flávio

“…Ozone is an oxidizing molecule used for disinfecting a wide variety of environments, such as in dental clinics, and has most recently been promoted as a…”
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Fabrication of Low-Cost Miniaturized Gas Cells via SLA 3D-Printing for UV-Based Gas Sensors by Barreto, Diandra Nunes, Gelamo, Rogério, Mizaikoff, Boris, Petruci, João Flávio da Silveira

“…The use of 3D-printing technology for producing optical devices (i.e., mirrors and waveguides) remains challenging, especially in the UV spectral regime. Gas…”
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From Light Pipes to Substrate-Integrated Hollow Waveguides for Gas Sensing: A Review by Barreto, Diandra Nunes, Kokoric, Vjekoslav, da Silveira Petruci, João Flávio, Mizaikoff, Boris

“…Absorption-based spectroscopy in the mid-infrared (MIR) spectral range (i.e., 2.5-25 μm) is an excellent choice for directly sensing trace gas analytes…”
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PERFORMING RELIABLE ABSORBANCE AND FLUORESCENCE MEASUREMENTS WITH LOW BUDGET - A TUTORIAL FOR BEGINNERS by Diandra Nunes Barreto, Vanderli G Leal, Josiele A. M Conrado, Gabriel M Fernandes, Caio Cesar Souza Machado, Alex D Batista, Sidnei G. da Silva, João Flávio da S Petruci

“…Molecular absorbance and fluorescence measurements are usually performed by benchtop or portable USB spectrophotometers or fluorometers. However, even the…”
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Novel approaches for colorimetric measurements in analytical chemistry – A review by Fernandes, Gabriel Martins, Silva, Weida R., Barreto, Diandra Nunes, Lamarca, Rafaela S., Lima Gomes, Paulo Clairmont F., Flávio da S Petruci, João, Batista, Alex D.

“…Colorimetric techniques have been developed and used in routine analyses for over a century and apparently all their potentialities have been exhaustively…”
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Analytical methods applied for ozone gas detection: A review by Petruci, João Flávio da Silveira, Barreto, Diandra Nunes, Dias, Mariana A., Felix, Erika P., Cardoso, Arnaldo A.

“…Ground-level ozone has been increasing worldwide, mainly due to the high anthropogenic emissions of NOx and VOCs. In addition, ozone generators are sold as…”
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A fully integrated 3D printed platform for sulfite determination in beverages via gas diffusion membrane extraction and digital video treatment by Fernandes, Gabriel Martins, Barreto, Diandra Nunes, Batista, Alex Domingues, da Silveira Petruci, João Flávio

“…•We present a portable device for sulfite quantification in food samples.•Sulfite was extracted using the gas diffusion microextraction method.•Quantification…”
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Reagent-less and sub-minute quantification of sulfite in food samples using substrate-integrated hollow waveguide gas sensors coupled to deep-UV LED by Barreto, Diandra Nunes, Martins, Gabriel, Hauser, Peter C., Mizaikoff, Boris, da Silveira Petruci, João Flávio

“…The increasing consumption of processed foods demands the usage of chemical preservatives to ensure freshness and extended shelf life. For this purpose, sodium…”
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