420 documents found, page 1 of 42
Can the region of production affect the quality and composition of olive oil? C...
Rocha, Pedrina; Lamas, Sandra; Casal, Susana; Martins, Luísa L.; Rodrigues, NunoPortugal is a notable olive oil-producing country, gaining prominence in the last decade. This study examined how geographic origin influences olive oil quality by analyzing samples from three key regions (Alentejo, Beira Interior, and Trás-os-Montes) and two major cultivars: Cobrançosa and Galega. All oils met the extra-virgin classification criteria, with free acidity consistently below 0.30%, and peroxide va...
Automated preprocessing of olive leaf images for cultivar classification using ...
Mendes, João; Lima, José; Rodrigues, Nuno; Pereira, Ana I.Olive cultivation is a pillar of Mediterranean agriculture, deeply rooted in both tradition and economic importance. This paper presents a novel two-phase methodology for the automated preprocessing of olive leaf images to facilitate accurate cultivar classification. Leveraging the state-of-the-art YOLO11 framework, two models (YOLO11n and YOLO11s) were employed for detection and segmentation tasks. A comprehen...
Endophytes induce volatile emission in olive trees with repellent activity agai...
Cunha, Ana E.; Rodrigues, Nuno; Casquero, Pedro; Pereira, José Alberto; Baptista, PaulaThe olive fruit fly, Bactrocera oleae (Rossi), is a key pest of the olive tree worldwide. This study explores whether the endophytes Alcaligenes faecalis, Aureobasidium pullulans, Bacillus amyloliquefaciens, and Penicillium commune can trigger the emission of repellent volatile organic compounds (VOCs) in olive trees, targeting B. oleae. Accordingly, olive trees were inoculated with each endophyte or with buffe...
Polyuria-polydipsia syndrome: a case report
Rocha, Rute Daniela Moreno Daniela; Rocha, Rute Daniela Moreno Daniela; Rodrigues, NunoIntroduction: Polyuria-polydipsia syndrome is a rare entity characterized by excessive water intake and increased urine elimination. The associated nonspecific symptoms make it likely to be initially presented at the primary health care level, with the need for a detailed clinical history and requests for complementary diagnostic tests to characterize these complaints. Once identified, it requires multidiscipli...
Consumer preferences for olive oil in the Iberian Peninsula
Baviera-Puig, Amparo; Lopéz-Cortés, Isabel; Pereira, José Alberto; Rodrigues, NunoThis study aims to analyse consumer preferences in the iberian Peninsula by comparing two important european Union-producing countries. in order to be able to make valid cross-cultural comparisons, we used the Best-Worst Scaling (BWS) methodology. We also performed segmentation using latent cluster analysis (lca), including all consumers analysed, regardless of country of origin, to obtain three different segme...
Potential use of the ATR-FTIR spectroscopy as an almond cultivar recognition to...
Lamas, Sandra; Rodrigues, Nuno; Santamaria-Echart, Arantzazu; Palu, Igor; Manhique, Jocyla; Herrero, Baudilio; Lopéz-Cortés, IsabelThree almond cultivars (Lauranne, Marinada, and Vairo) were studied, considering morphological parameters that showed statistical cultivar-dependence but not enabled accurate cultivar recognition. Alternatively, attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) was applied to whole endocarp, kernel, and ground almonds. Both transmittance spectra and respective derivatives (3400–280...
Evaluating soil phosphorus tests and nutrient limitations in Mediterranean past...
Arrobas, Margarida; Raimundo, Soraia; Sawimbo, Almeida; Rodrigues, Nuno; Jongen, Marjan; Teixeira, Ricardo F.M.; Domingos, TiagoReliable phosphorus (P) fertilization guidelines for Mediterranean pastures remain uncertain due to inconsistent soil testing methods, the complexity of mixed-species systems, and the neglect of other limiting nutrients. This study primarily aimed to identify reliable soil P tests and secondarily to explore potential nutrient limitations by assessing seven acidic Portuguese soils under Mediterranean conditions ...
Deciphering How Olive Volatiles and Fatty Acids Shape Bactrocera oleae (Rosii) ...
González‐Fernández, Antonio; Rallo, Pilar; Peres, António M.; Rodrigues, Nuno; Casal, Susana; Pereira, José Alberto; Morales‐Sillero, AnaThe olive fly (Bactrocera oleae (Rossi)), the major pest of olives, primarily recognises visual, olfactory, acoustic, gustatory and tactile signals that regulate its behavioural activity, courtship and reproductive success, as well as the search for ideal conditions for its offspring. Recent studies highlight the importance of chemical compounds present in olive fruits, particularly volatile organic compounds (...
Chemical Composition of Almond Varieties Collected in the Valencian Region (Spain)
Lopéz‐Cortés, Isabel; Fernandes, Luana; Baviera‐Puig, Amparo; Salazar, Domingo M.; Rodrigues, Nuno; Pereira, José Alberto; Ramalhosa, ElsaAlmonds (Prunus amygdalus Batsch) are consumed worldwide, with great economic importance in Spain. In the present work, six varieties collected in Valencia (Spain) were characterised: 'Desmayo Rojo', 'Guara', 'Desmayo Largueta' and 'Marcona' (Spanish varieties), and 'Ferraduel' and 'Ferragn & egrave;s' (French varieties). The different varieties differed significantly in nutritional composition, fatty acid prof...
Carob and pomegranate extracts enhance plant defence mechanisms against olive a...
Antón-Domínguez, Begoña I.; Sánchez-Pereira, Luiza; Lamas, Sandra; Rodrigues, Nuno; Baptista, Paula; Agustí-Brisach, CarlosOlive anthracnose (OA), caused by Colletotrichum species, is one of the most economically damaging disease in olive sector. This study was focused to identify sustainable control alternatives by evaluating the effect of pomegranate and carob extracts against OA and elucidating their mode of action. In vitro assays on mycelial growth, conidial production, and germination, and appressoria formation of C. godetiae...