Browsing by Author "Pereira, Sandra"
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- Estudo do comportamento de leveduras isoladas de mel de néctar e de meladasPublication . Pinto, Miguel; Pereira, Sandra; Rocha, Amélia; Carreira, Conceição; Estevinho, Leticia M.Neste trabalho fomos comparar a resistência, no que respeita ao crescimento, à produção de biomassa e a viabilidade celular, de duas estirpes de leveduras, a diferentes açúcares (glucose, frutose e sacarose). As estirpes utilizadas foram Zygosaccharomyces rouxii ESA 17 e Cryptococcus humicola ESA 51, isoladas pela Escola Superior Agrária de Bragança a partir de méis de néctar e de melada, respectivamente.
- Foliar Silicon Application in the Era of Climate Change as a Part of Strategy to Reduce Water Requirements in Mediterranean ViticulturePublication . Dinis, Lia Tânia; Mota, Natalia; Martins, Sandra; Ribeiro, A.C.; Moutinho-Pereira, José; Pereira, SandraRising temperatures and water scarcity due to climate change are significant challenges for Mediterranean viticulture, particularly in the Douro Valley, a prominent winemaking region. Silicon (Si) has gained attention as a potential solution for mitigating these environmental stresses, especially in areas with limited water resources. This study explores the foliar application of Si as a promising strategy to reduce water requirements in vineyards, specifically for the Touriga Franca variety, thereby supporting more sustainable water use. Four treatments were tested: nonirrigated control (C−), an irrigated control under a deficit irrigation regime (25% ETc; C+), and two Si concentrations (7% Si-Si1 and 20% Si-Si2) applied to non-irrigated plants. Results demonstrate that Sitreated plants improved physiological resilience, as evidenced by enhanced photosynthetic efficiency, greater water-use efficiency, and higher biochemical quality in both leaves and berries. Additionally, Si application increased leaf flavonoids and simultaneously improved must composition due to its overall influence on vine physiology, indicating its potential as a sustainable alternative to irrigation for reducing summer stress. This research suggests that foliar Si application could be a valuable, eco-friendly strategy to support sustainable viticulture under increasingly arid conditions, reducing the irrigation needs.
- Gestão do regime terapêutico ao longo do programa de reabilitação cardíacaPublication . Delgado, Bruno; Pereira, Fernanda; Pereira, Sandra; Lopes, Ivo; Novo, AndréA gestão do regime terapêutico foca-se no conhecimento sobre a doença, suas complicações e a gestão eficaz dos fatores de risco cardiovasculares (FRCV), procurando a estabilização clínica, evitando recidivas e progressão da doença. O programa de reabilitação cardíaca (PRC) assenta em pilares como o exercício físico e o ensino/instrução e treino sobre a gestão dos FRCV. Objetivos: Avaliar os parâmetros antropométricos dos pacientes elegíveis para PRC Avaliar o grau de conhecimento do paciente sobre os FRCV Analisar a evolução dos parâmetros antropométricos ao longo do PRC Perceber o grau de aquisição de conhecimentos sobre a gestão do regime terapêutico (GRT) Metodologia: Serão apresentados resultados parcelares de um estudo longitudinal com início em outubro de 2017, onde os doentes são avaliados e acompanhados até 1 ano após evento cardíaco agudo. Durante o período de internamento (Fase I) e PRC (Fase II) (figura 2) são avaliados os parâmetros antropométricos relevantes, FRCV, assim como a verificação do conhecimento sobre: Doença/ Medicação/ Regime alimentar/ Treino de exercício físico. São realizados ensinos dirigidos de acordo com os défices de conhecimento manifestados e realizadas consultas de enfermagem de acompanhamento, com avaliações na data da alta, início e fim do PRC, ao final de 6 e de 12 meses após início do PRC. Resultados: Os resultados apresentados referem-se a uma amostra de 47 pacientes que terminaram a fase II do PRC de um universo de 217, sendo 40 do sexo masculino e com uma média de idades global de 64 anos. À data de admissão o nível de conhecimento sobre GRT apresenta uma taxa mínimas de 2% e máxima de 10%. Após o ensino realizado no internamento verifica-se uma melhoria face á demonstração de conhecimento, sendo esta evolução mais acentuada no final da Fase II, com taxas na ordem dos 64% a 77%, refletindo uma melhoria homogénea do conhecimento nas diferentes áreas (tabela1). Relativamente aos parâmetros antropométricos, verifica-se que em todos eles existe uma grande percentagem de doentes com redução do parâmetro, sendo esta mais acentuada no final da Fase II (cerca de 4 meses após o evento agudo). O FRCV mais prevalente é a dislipidemia com cerca de 65% dos pacientes e o menos prevalente é a DM com 26%. Conclusões: Constatamos que o nível de conhecimento dos pacientes sobre os FRCV e estratégias de controlo dos mesmo, são bastante reduzidos, sendo que a gestão eficaz dos FRCV e a melhoria significativa dos parâmetros antropométricos, carece de um período de tempo de ensino/ instrução/ Treino prolongado e um acompanhamento frequente (4 a 5 meses). Com mais tempo de intervenção poderemos atingir taxas de adesão à GRT próximas dos 95% e parâmetros antropométricos enquadrados nas recomendações internacionais
- Kaolin foliar spray induces positive modifications in volatile compounds and fruit quality of Touriga-Nacional red winePublication . Dinis, Lia Tânia; Pereira, Sandra; Fraga, Irene; Rocha, Sílvia M.; Costa, Carina; Martins, Cátia; Vilela, Alice; Arrobas, Margarida; Moutinho-Pereira, JoséSolar radiation and temperature play crucial roles in grapevine metabolic processes and are known to have a positive impact on grape berry composition; however, excessive exposure to these factors can be detrimental. Kaolin-based particle film technology has emerged as a valuable solution for mitigating the effects of heat and water stresses in vineyards. This work aimed to evaluate the effects of kaolin application on the phenolic composition, chromatic characteristics, oenological parameters, volatile compounds and sensory profile of red wine. The study was carried out in one growing season in the commercial vineyard “Quinta dos Aciprestes” in the Douro Superior sub-region. Twelve rows in triplicate of the Touriga-Nacional variety underwent foliar kaolin treatment (applied at the pre-veraison stage, at the manufacturerrecommended and -tested dosage of 5 % (w/v)), and another twelve rows comprised the nontreated control group. Kaolin increased the phenolic compound and tartaric acid concentrations (2.4 % and 20.8 % respectively), total acidity (2.4 %), the deep reddish colour of the berries, total and coloured anthocyanin (2.8 %), and total and polymeric pigments (3.6 %); meanwhile, a decrease was observed in pH (-1.4 %) and alcoholic degree (-4.8 %). No significant differences were observed in any sensory parameters between the wine from the kaolin-treated and control vines, but the tasters found the aroma of the former to be fruitier and more complex, with an agreeable acidic taste and persistence. It was possible to group the volatile compounds into two distinct groups based on the results of the Pearson’s correlation matrix. This grouping corresponds to the sensory descriptors common to each of the respective volatiles. Overall, the results further support the potential efficacy of utilising kaolin to alleviate summer-related stress in grapevines.
- Pesquisa de resíduos de fungicidas no mosto e no vinhoPublication . Pinto, Miguel; Pereira, Sandra; Fernandes, Conceição; Andrade, João Verdial; Estevinho, Leticia M.
- Thermalism as A Determinant of Quality of Life and Sleep: A Novel Approach to The Sector Using SF-36v2 and Pittsburgh IndexPublication . Pereira, Sandra; Silva, Jani; Marques, Catarina; Galvão, Ana Maria; Alves, Maria JoséThermalism has been used to improve health status, with emphasis on well-being, including relaxation, stress relief, depression, and even recovery and energy reserve. This study aimed to evaluate the perception of quality of life (QOL) by SF 36v2, and the quality of sleep, using the Pittsburgh Index, in individuals who attended the therapeutic thermalism at Chaves thermal Spa, in different treatment time points, pre-and post-treatment for 14 days. Methodology: Thermal Spa patients attending therapeutic thermalism at Chaves thermal Spa (N=90) completed a questionnaire with information on sociodemographic data, on health-related quality of life (SF-36v2), and on quality of sleep (Pittsburgh Sleep Quality Index (PSQI)). Results: In the thermal pre-treatment evaluation, participants revealed a good quality of life in the physical and social functioning, vitality, emotional role functioning, and mental health domains. In the post-treatment assessment, there all QOL indexes were improved, physical functioning, physical role functioning, bodily pain, and emotional role functioning. The participants revealed a good sleep quality in the following dimensions: sleep duration and efficiency, use of sleeping medications, and daytime dysfunction. In the second evaluation time-point, there was an improvement of all sleep quality indices, except for the sleep duration component. Regarding the quality of life and sleep by sociodemographic variables, data revealed that men had a better quality of life and sleep than women. Conclusion: Thermal treatments provided significant benefits for the quality of life and sleep. These results may contribute to improve the knowledge on the potentialities of thermal treatments and, ultimately to attract tourists seeking the benefits of thermal waters on its holistic vision.