17 Result(s)

Article

Screening of Antioxidant Compounds in Green Coffee by Low-Pressure Chromatography with Amperometric Detection

In this work, the electrochemical determination of antioxidant compounds in green coffee beans using a low-pressure chromatographic system based on a single 1-cm length monolithic column is presented. Screenin...

Alexandra Rangel Silva, João Rodrigo Santos, P. J. Almeida… in Food Analytical Methods (2021)

Article

Radiotherapy-customized head immobilization masks: from modeling and analysis to 3D printing

Immobilization devices may be a valuable aid to ensure the improved effectiveness of radiotherapy treatments where constraining the movements of specific anatomical segments is crucial. This need is also prese...

M. A. R. Loja, D. S. Craveiro, L. Vieira, E. Sousa… in Nuclear Science and Techniques (2019)

Chapter and Conference Paper

Developments on Finite Element Methods for Medical Image Supported Diagnostics

Variational image-processing models offer high-quality processing capabilities for imaging. They have been widely developed and used in the last two decades, enriching the fields of mathematics as well as info...

A. Almeida, J. I. Barbosa, A. Carvalho, M. A. R. Loja, R. Portal… in VipIMAGE 2017 (2018)

Article

Evaluation of laser fluorescence in monitoring non-cavitated caries lesion progression on smooth surfaces in vitro

The aim of this study was to evaluate the performance of a pen-type laser fluorescence (LF) device (LFpen: DIAGNOdent pen) to detect and monitor the progression of caries-like lesions on smooth surfaces. Fifty...

J. A. Rodrigues, C. S. Sarti, C. M. Assunção, R. A. Arthur… in Lasers in Medical Science (2017)

Article

Caries-preventive effect of anti-erosive and nano-hydroxyapatite-containing toothpastes in vitro

The aim of the study was to investigate the caries-preventive effect of newly developed fluoride and fluoride-free toothpastes specially designed for erosion prevention. The hypothesis was that these products ...

M. Esteves-Oliveira, N. M. Santos, H. Meyer-Lueckel… in Clinical Oral Investigations (2017)

Article

Collective processes in a large atomic laser cooling experiment

We introduce an hydrodynamic description of a laser cooled gas. In large traps, with as much as \(10^{10}\) ...

J. D. Rodrigues, J. A. Rodrigues, A. V. Ferreira… in Optical and Quantum Electronics (2016)

Article

Association between two visual criteria in assessing non-cavitated caries lesion activity on occlusal surfaces of permanent molars

This study aimed to evaluate the association between two visual criteria in assessing non-cavitated caries lesion activity on occlusal surfaces of permanent molars.

R. S. Oliveira, J. E. A. Zenkner, M. Maltz, J. A. Rodrigues in Clinical Oral Investigations (2015)

Article

Traditional and novel methods for occlusal caries detection: performance on primary teeth

This study aimed to assess the performance of International Caries Detection and Assessment System (ICDAS), radiographic examination, and fluorescence-based methods for detecting occlusal caries in primary tee...

J. F. Souza, T. Boldieri, M. B. Diniz, J. A. Rodrigues… in Lasers in Medical Science (2013)

Article

Rubber-mortar composites: Effect of composition on properties

The Weibull modulus of mortar specimens containing 35% (w/w of cement content) of NaOH-treated rubber particles was calculated showing a value of 9.1 for the control and 9.4 for the specimens with rubber, indi...

N. Segre, I. Joekes, A. D. Galves, J. A. Rodrigues in Journal of Materials Science (2004)

Article

Alumina-mullite-zirconia composites obtained by reaction sintering Part II. R-Curve behavior

Applying Linear Elastic Fracture Mechanics equations and sample compliance variation to quantify the instantaneous crack length, the R-curve behavior of alumina-mullite-zirconia composites obtained by reaction...

A. C. Mazzei, J. A. Rodrigues, V. C. Pandolfelli in Journal of Materials Science (2000)

Article

Alumina-mullite-zirconia composites obtained by reaction sintering: Part I. Microstructure and mechanical behaviour

Zirconia particles can be added to the matrix to overcome the brittleness inherent in ceramic materials, thereby strengthening the material through tetragonal-monoclinic phase transformation of the zirconia. T...

A. C. Mazzei, J. A. Rodrigues in Journal of Materials Science (2000)

Article

Effects of TiO₂ addition on the sintering of ZrO₂·TiO₂ compositions and on the retention of the tetragonal phase of zirconia at room temperature

The production of tetragonal zirconia polycrystalline (TZP) ceramics and the identification of factors controlling retention of the tetragonal phase in the ZrO₂·TiO₂ system have been investigated. In this binary ...

V. C. Pandolfelli, J. A. Rodrigues, R. Stevens in Journal of Materials Science (1991)

Article

Thermodynamic predictions for the formation of ceramic-metal composite by self-propagating high-temperature synthesis

J. A. Rodrigues, V. C. Pandolfelli, W. J. Botta F.… in Journal of Materials Science Letters (1991)