26 documents found, page 1 of 3

Sort by Issue Date

Rapid screening of fumonisins in maize using near-infrared spectroscopy (NIRS) ...

Sampaio, Pedro; Barros, Sílvia Cruz; Freitas, Andreia; Silva, Ana Sanches; Brites, Carla; Carbas, Bruna

Fumonisins occurrence in maize represents a significant global challenge, impacting economic stability and food safety. This study evaluates the potential of near-infrared (NIR) spectroscopy combined with chemometric al- gorithms to detect fumonisins in maize. For fumonisin B1 (FB1) and B2 (FB2) levels were developed predictive NIR models using partial least squares (PLS) and artificial neural networks (ANN). P...

Date: 2025   |   Origin: Biblioteca Digital do IPB

Enhancing bioactive compound classification through the synergy of fourier-tran...

Sampaio, Pedro; Calado, Cecília

Bacterial infections and resistance to antibiotic drugs represent the highest challenges to public health. The search for new and promising compounds with anti-bacterial activity is a very urgent matter. To promote the development of platforms enabling the discovery of compounds with anti-bacterial activity, Fourier-Transform Mid-Infrared (FT-MIR) spectroscopy coupled with machine learning algorithms was used t...


A new method for a rapid and high-throughput comparison of molecular profiles a...

Caldeira, Viviana; Fonseca, Tiago AH; N'Dembo, Luana; Araújo, Rúben; Von Rekowski, Cristiana; Sampaio, Pedro; Calado, Cecília

To robustly discover and explore phytocompounds, it is necessary to evaluate the interrelationships between the plant species, plant tissue, and the extraction process on the extract composition and to predict its cytotoxicity. The present work evaluated how Fourier Transform InfraRed spectroscopy can acquire the molecular profile of aqueous and ethanol-based extracts obtained from leaves, seeds, and flowers of...


Evidence for an association of prenatal exposure to particulate matter with cli...

Santos, João Xavier; Sampaio, Pedro; Rasga, Célia; Martiniano, Hugo; Faria, Clarissa; Café, Cátia; Oliveira, Alexandra; Duque, Frederico

Early-life exposure to air pollutants, including ozone (O3), particulate matter (PM2.5 or PM10, depending on diameter of particles), nitrogen dioxide (NO2) and sulfur dioxide (SO2) has been suggested to contribute to the etiology of Autism Spectrum Disorder (ASD). In this study, we used air quality monitoring data to examine whether mothers of children with ASD were exposed to high levels of air pollutants duri...


Evidence for an association of prenatal exposure to particulate matter with cli...

Xavier Santos, João; Sampaio, Pedro; Rasga, Célia; Martiniano, Hugo; Farias, Clarissa; Café, Cátia; Oliveira, Alexandra; Duque, F; Oliveira, Guiomar

Early-life exposure to air pollutants, including ozone (O3), particulate matter (PM2.5 or PM10, depending on diameter of particles), nitrogen dioxide (NO2) and sulfur dioxide (SO2) has been suggested to contribute to the etiology of Autism Spectrum Disorder (ASD). In this study, we used air quality monitoring data to examine whether mothers of children with ASD were exposed to high levels of air pollutants duri...


Antimicrobial evaluation of the Cynara cardunculus extract in Helicobacter pylo...

Sampaio, Pedro; Calado, Cecília

The treatment effectiveness of gastric diseases caused by the bacteria Helicobacter pylori is failing due to high resistance to some antibiotics. Consequently, it is urgent to develop an accurate methodology to screen new antimicrobial agents. Methods and results: A preliminary assay, using both therapeutic-based antibiotics (clarithromycin and metronidazole), was conducted to optimize experimental conditions i...


Comparison of partial least squares-discriminant analysis and soft independent ...

Sampaio, Pedro; Calado, Cecília

Saccharomyces cerevisiae is a widely studied and highly utilized eukaryotic organism, ideally suited to high throughput metabolic analysis, being a powerful model for understanding basic cell biology. This study compares the models developed by two supervised methods, such as the partial least squares-discriminant analysis (PLS-DA) and soft independent modeling of class analogy (SIMCA), using mid-infrared (MIR)...


Primary ciliary dyskinesia due to CCNO mutations : a genotype‐phenotype correla...

Henriques, Ana Raquel; Constant, Carolina; Descalço, Andreia; Pinto, Andreia; Moura Nunes, J.; Sampaio, Pedro; Lopes, Susana S.; Pereira, Luísa

Primary ciliary dyskinesia (PCD) is genetically and clinically heterogeneous. CCNO mutations are associated with chronic destructive lung disease and were first described in 2014. Early reports suggest that CCNO is mutated more frequently than expected, however, these are considered rare. We report on three eleven-year-old children with PCD due to CCNO mutations. All children presented early-onset respiratory s...



A portable lab for the practical study of modern computer engineering

Dias, Tiago; Sampaio, Pedro; Miguens Matutino, Pedro

This demo paper presents the μLIC educational platform. μLIC makes available to the students of Digital Systems and Computer Architecture courses a quite simple, intuitive and portable hardware platform for the realization of their laboratory exercises. μLI C can also be used in other related courses, such as Embedded Systems or Hardware/Software Co-Design, which allows reducing the time needed to study the man...


26 Results

Queried text

Refine Results

Author





















Date
















Document Type






Funding



Access rights



Resource









Subject