Percorrer por autor "Rocha, Ana"
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- Análise de amostras comerciais de mel: caracteres organoléticos, corantes e impurezas e ácidos livresPublication . Martins, Adriana; Ribeiro, Adriana; Marques, Ana; Rocha, Ana; Rompante, Ana; Leão, Bruna; Baltarejo, Irene; Peixoto, Mariana; Ribeiro, Marina; Gomes, Raquel; Rei, Soraia; Silva, Valéria; Pereira, Maria João; Pinho, Cláudia; Pinho, Cláudia; Pereira, Maria JoãoO mel é uma substância açucarada produzida por abelhas Apis melífera a partir do néctar ou secreções provenientes de partes vivas das plantas, sendo procurado pelas propriedades antimicrobianas, antitússicas, laxantes e anti-inflamatórias[1,2]. Existem requisitos na legislação que os operadores do setor do mel devem respeitar (teor de açucares, teor de água, ácidos livres) e, quando comercializado, não deve haver inclusão de aditivos alimentares[3]. Analisar amostras comerciais de mel quanto às características organoléticas, consistência, presença de corantes/impurezas, e percentagem de ácidos livres. Estudo experimental com quatro amostras de mel (amostra 1: mel de urze e queiró; amostra 2: mel de urze; amostra 3: mel de eucalipto; amostra 4: melmultifloral).Caracterizaram-se as amostras quanto à cor, aroma e consistência. Na pesquisa de corantes/impurezas verificou-se a presença/ausência de corantes, cloretos, sulfatos, cálcio, amido e dextrinas. No doseamento dos ácidos livres, estes foram expressos em ácido fórmico[4]. As amostras 1, 2 e 4 apresentaram uma cor mais escura, e a amostra 3 uma tonalidade mais clara. As amostras 1 e 2 (com urze) apresentaram um aroma mais forte; a amostra 3 um aroma floral (eucalipto) e a amostra 4 também floral. As amostras 1, 3 e 4 eram fluídas e a amostra 2 viscosa. Não se observaram corantes/impurezas nas amostras analisadas. Apenas as amostras 1 (0,09±0,01%) e 3 (0,12±0,01%) obtiveram valores de ácidos livres dentro do estipulado (>0,15%) [4]. A cor do mel varia de uma tonalidade quase incolor a castanho-escuro; o aroma varia consoante a origem vegetal; quanto à consistência, pode apresentar-se fluido, espesso ou cristalizado [3]. O mel pode aparecer falsificado, uma consequência do seu aspeto e composição. Porém, as amostras em estudo apenas revelaram valores de ácidos livres fora do estipulado. Realça-se assim, a importância do controlo de qualidade dos produtos comercializados.
- Caracterização da função pulmonar de bombeiros da Região Norte de PortugalPublication . Rocha, Ana; Martins, Cristiana; Baeta, CristinaOs Bombeiros estão expostos frequentemente a vários poluentes prejudicando gravemente a sua saúde respiratória. Foi realizado um estudo observacional e transversal, com o objectivo de caracterizar a função pulmonar dos bombeiros da região norte de Portugal. A amostra foi constituída por 44 Bombeiros de Valongo e Rebordosa. Todos os participantes preencheram um questionário, executaram espirometrias e mediram o monóxido de carbono. Verificou-se uma elevada prevalência de hábitos tabágicos, bem como da carga tabágica. A percentagem de alterações espirométricas foi de 38,6% e a utilização de protecção respiratória revelou-se praticamente inexistente nos incêndios florestais.
- Microaneurysm counting as a biomarker for the hyperperfusion stage of nonproliferative diabetic retinopathyPublication . Mendes, Luís; Rocha, Ana; Lopes, Marta; Almeida, Ana; Duarte, Nicole; Reste‑Ferreira, Débora; Martinho, António; Pereira, Pedro; Marques, Inês; Lobo, Conceição; Cunha‑Vaz, JoséThis study aimed to investigate the utility of microaneurysm (MA) counting as a tool for characterizing the hyperperfusion stage of nonproliferative diabetic retinopathy (NPDR) and to examine the hypothesis that MAs can serve as a surrogate biomarker for the presence of intraretinal microvascular abnormalities (IRMAs). Forty-nine (n = 49) eyes with type 2 diabetes mellitus with NPDR were included in this analysis: 12 with Early Treatment Diabetic Retinopathy Study (ETDRS) levels 43 and 37 with levels 47–53. Automated MA detection was performed using the RetmarkerDR software (Retmarker SA, Meteda Group, Italy), alongside manual detection, both done in the central retina (field 2). Based on MA counts, microaneurysm turnover (MAT) was computed. IRMAs were manually counted based on swept-source optical coherence tomography (SS-OCT) angiography on PLEX® Elite 9000 (ZEISS, Dublin, CA, USA). The statistically significant differences between ETDRS groups were studied by comparing Mann–Whitney U test p values (significance value < 0.05). The correlation between the presence of MAs and IRMAs and MAT and IRMAs was examined using Spearman correlation analysis. There was an observed increase in the number of IRMAs, MAs, and MAT values as NPDR progressed, independently of the counting method used. Specifically, this increase was noted when transitioning from ETDRS groups characterized by the predominance of the hypoperfusion stage (ETDRS 43) to those associated with the hyperperfusion stage (ETDRS 47–53). When MAs were counted manually, a moderate correlation was identified between the number of MAs and the presence of IRMAs (ρ = 0.40; p value = 0.005). Additionally, a similar correlation was found between MAT and the presence of IRMAs (ρ = 0.43; p value = 0.002). This study underscores the potential relevance of MAs as a pivotal indicator of the hyperperfusion stage of NPDR and supports their role as surrogate biomarkers for IRMAs. These results suggest a role for MA counting in the assessment and management of diabetic eye disease.
- Near-miss no jogo patológico e problemático: estudo comportamental e de eeg com a tarefa slot machinePublication . Rocha, Ana; Dores, Artemisa Rocha; Jesus, André; Gonçalves, Francisca; Geraldo, Andreia,; Barbosa, FernandoA Perturbação de Jogo Patológico caracteriza-se pelo envolvimento mal adaptativo em atividade de jogo, resultando em prejuízos de ordem financeira, profissional, pessoal e familiar. O efeito de Near-miss consiste em perder por pouco, ilustrando um dos tipos de distorção cognitiva que parecem ocorrer. Alguns autores sinalizam a necessidade de desenvolver trabalhos que analisem o impacto das distorções cognitivas nos testes neuropsicológicos e de corroborar os resultados com medidas neurofisiológicas, reunindo evidências que ajudem à compreensão desta problemática.
- Neurophysiological correlates of near-miss in pathological and problematic gamblingPublication . Dores, Artemisa Rocha; Rocha, Ana; Geraldo, Andreia,; Barbosa, FernandoNear-miss is losing events that come close to a win. It illustrates one of the cognitive distortion types that can occur during gambling. We intended to analyze the neurophysiological correlates of the near-miss effect through an ERP (Event-related Potentials) study.
- The impact of tourism in the restaurant business: a case study in the city of OportoPublication . Rocha, Ana; Azevedo, Daniel; Silva, SusanaThe evolution of the restaurant business has always been strongly associated with the evolution of the tourism sector. In fact, several authors have identified and described the relationship between these two sectors. Restaurants and gastronomy are a significant part of the local culture and can work as a major touristic attraction. At the same time, restaurants profit from the increase in tourists in a particular market. However, there is few information on how the tourism sector impacts the restaurant business. This study aims to shed some light on how restaurants are influenced by the growth of tourism and how they adapt themselves to this ”new” customers. For that, a quantitative study was conducted in the city of Oporto which has been considered for the past years on of the best destinations in Europe and in the world, and that recognition has led to a steady increase in tourism, making it an excellent case study. A sample of 69 restaurants located in the city answered an online questionnaire with questions about restaurant location and characteristics, business growth and response to the increase in tourists at three specific periods in time — 2012, 2015 and 2018. Statistical analyses were performed with IBM SPSS 25.0. The preliminary results showed that most (n=53, 78,1%) of the restaurants were small or medium enterprises, 82,4% were located nearby touristic enterprises, 89,7% were nearby public transport stop and nearby touristic monuments. Regarding the number of foreign clients, there is a significant increase between 2012 and 2015, and a slight increase for 2018. There is also an increase in average selling price of a meal for 2012 and 2018. Regarding seasonality, results showed a higher distribution of customers across the year. The results valued the changes made in the restaurants namely hiring new collaborators with foreign languages abilities. Regarding the differences between historical and non- historical city centre restaurants there were statistical differences in the number of tourists in 2015, the number of tourists and the selling price of a meal in 2018. The restaurants in historical city centre had more tourists and a higher price. Thus, we can conclude that the characteristics of the restaurants customers has changed overtime and there is a decrease of seasonality associated to this business. The increase in the average selling price of a meal suggest that there is room for restaurants to upgrade their value proposition. Therefore, it is important the business sector follow this evolution and the specific needs of the customers related to this changes.