Browsing by resource type "conference paper"
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- Assessing beekeeping potential in a Portuguese area with honey Protected Designation of OriginPublication . Silveira, Carlos; Roque, Natália; Fernandez, Paulo; Anjos, O.; Vilas-Boas, MiguelThis study aims to assess the beekeeping potential in a Portuguese area with honey protected designation of origin (PDO) following a multi-criteria decision analysis (MCDA) for supporting beekeepers in the selection of the best locations for apiaries, thus maximizing honey production and reducing the risk of bee colony losses.
- Brucella spp. seroprevalence in wild ungulates in PortugalPublication . Pires, Humberto; Matos, Manuela; Cardoso, Luis; Lopes, Ana Patrícia; Fontes, Maria da Conceição; Santos Pintado, Cristina Maria Baptista; Figueira, Luís Manuel Faria; Mesquita, João R.; Matos, Ana; Coelho, Ana CláudiaBrucella spp. seroprevalence in wild ungulates in Portugal.
- Comparative analysis of bee pollen quality following different storage techniquesPublication . Anjos, O.; Seixas, Natália; Antunes, Carlos; Campos, Maria da Graça; Paula, Vanessa; Estevinho, Leticia M.Bee pollen is aknowledged as a versatile natural food valued for its nutritional and medicinal benefits, attributed to its rich chemical composition boasting notable bioactivities like antioxidant and antimicrobial.
- Comparison of FT-Raman and FT-NIR spectroscopy for distinguishing between two honey PDOsPublication . Pedro, Soraia; Ferreira, Ana; Catarro, Gonçalo; Gallardo, Eugenia; Peres, Maria de Fátima; Anjos, OféliaVibrational spectroscopy has demonstrated high applicability for honey analysis, offering rapid, non-destructive and accurate methods for assessing its chemical composition, identifying different honey regions and ensuring authenticity. In this study, we compare the usefulness of FT-Raman and FT-NIR spectroscopy techniques in distinguishing between two Protected Designation of Origin (PDO) of honey, name quality, determined according to the standard methods of the International Honey Commission including acidity, pH, moisture, water activity (aw), electrical conductivity (EC), total polyphenols (TPC), total flavonoid content (TFC), and CIELAB color (L*, a*, b*), as well as the color in PFUND scale. The values observed for the analytical parameters are all in accordance with legal limits.
- Compositional signature of trace elements in stream sediments along the Babahoyo/Daule riverbeds (Ecuador): A geostatistical and Bayesian approachPublication . Cabrera, Marlon; Pazo, Maria; Gerassis Davite, Saki; Albuquerque, Maria Teresa; Sierra, C.; Boente, CarlosThe high concentration of potencially toxic elements (PTEs) in stream sediments may pose a significant threat since the pollutants may travel long distances to the sea, affecting aquatic environments and public health. When rivers cross large cities, minning, or cultivated areas, it is usually observing an increasing concentration of PTEs downstream, reachiong hazardeous levels due to the ability and persistence oh heavy metals by bioaccumulation in the enviromnent.
- Contribuição de modelos estocásticos no estudo da contaminação de antigas explorações mineirasPublication . Góis, Joaquim; Carvalho, Paulo; Isabel Margarida Horta Ribeiro Antunes; Albuquerque, Maria TeresaO presente trabalho consiste no estudo sobre eventuais contaminações provocadas pela atividade mineira da uma antiga mina de Sn-W na zona centro de Portugal. Em toda área envolvente da antiga exploração, foram recolhidas amostras de sedimentos de corrente. A análise destas amostras permitiu determinar valores de concentração para vários elementos químicos. Com base no método IGeo e nos critérios de Muller (Antunes et al., 2018), foram estabelecidos um conjunto de índices e níveis de contaminação. Posteriormente, com o recurso a metodologias no âmbito da estatística multivariada e da geoestatística, construíram-se representações cartográficas e quantificou-se a variabilidade espacial dos diferentes elementos químicos suscetíveis de contaminar importantes cursos de água com consequentes implicações para a saúde humana (Antunes et al., 2016).
- Determination of an analytical expression for chart rt (WMAPT) using evolutionary polynomial regressionPublication . Gardete, Dinis; Luzia, Rosa; Capitão, Silvino; Picado Santos, Luis
- Differentiation of honey produced in two PDO regions in Portugal using FTIRT-ATR analysisPublication . Pedro, Soraia; Ferreira, Ana; Gouveia, Cecília; Gallardo, Eugenia; Rodrigues, A.M.; Peres, Maria de Fátima; Anjos, O.The chemical composition of honey in a Protected Designation of Origin (PDO) reflectes the unique characteristics of the region, ensuring authenticity through rigorous standards. To identify the consistent analytical parameters within a particular PDO and assess the possibility of distinguishing them using rapid techniques, such as FTIR-ATF (Fourier Transform Infrared Spectroscopy with Attenuated Total Reflectance).
- Evidence for sporadic Coxiella burnetii excretion in sheep milk, central PortugalPublication . Pires, Humberto; Silva, S. Santos; Cruz, A.; Cardoso, Luís; Lopes, A.P.; Pereira, M.A.; Nóbrega, C.; Mega, A.C.; Santos, C.; Cruz, R.; Esteves, F.; Vala, H.; Matos, Ana; Barradas, P.F.; Coelho, A.C.; Mesquita, J.R.Coxiella burnetii, the causative agent of Q fever, is a globally distributed zoonosis, with cattle, sheep, and goats considered the main reservoirs of the disease (Agger et al,., 2013; Bento et al., 2023). Human transmission primarily occurs through inhaling infections aerosols from milk, faeces, urina, and birth products from infected ruminants. This study used a 2-year longitudinal approach to investigate C. burnetii excretion in bulk tank milk samp+les from sheep in central Portugal.
- The geochemical behavior of Pb and Zn in waters and stream sediments around a former Pb-Zn mine, central PortugalPublication . Carvalho, Paula; Antunes, I.M.H.R.; Albuquerque, Maria Teresa; Santos, AntónioIn Portugal, ore mineral exploitation has left millions of tons of mining waste rich in metals in the environment. The former Várzea Pb-Zn mine is located in the Várzea dos Cavaleiros village, about 10 km from Sertã village and 65 km from Castelo Branco county, central Portugal. The Pb-Zn quartz vein with N10ºW; 75º SW orientation, 0.5-1.5 m thick, intruded the Neoproterozoic-Cambrian schist-greywacke complex. About 17576.47 tons of ore minerals were exploited between 1953 and 1967 [1]. There are two main mine dumps, the largest one is 100 m long and 47 m wide. The other dump is mainly composed of fine tailings.