Percorrer por autor "Martins, Joana"
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- Assessing the nutritional and functional properties of mushrooms from North-Eastern PortugalPublication . Martins, Joana; Garcia, Juliana; Gouvinhas, Irene; Pinto, Diana; Rodrigues, Francisca; Saavedra, Maria José; Alves, Maria JoséMushrooms are recognized as functional foods with noteworthy nutritional, culinary, and pharmacological properties, leading to their growing consumption. The present study aimed to compare the chemical composition and biological properties of six wild species harvested in north-eastern Portugal and two cultivated species (Lentinula edodes and Pleurotus citrinopileatus, purchased in Portuguese retail markets) to evaluate their potential as sources of nutrients and bioactive compounds. The results showed diverse macronutrient proximate profiles, characterized by high carbohydrate, dietary fibre, and protein, along with low-fat content and with moderate antioxidant activity. Notably, glucans were present in high amounts, with beta-glucans representing the major fraction. Despite species-specific variations, potassium and phosphorus were the predominant mineral elements. Additionally, lysine and arginine were the most abundant free amino acids in the samples. Overall, this manuscript provides a comprehensive insight into the chemical composition, bioactive properties, and nutritional potential of commercially available and wild mushrooms, supplying the first detailed glucan, mineral and antioxidant profile for five under-studied wild species from north-eastern Portugal.
- A Automedicação nos alunos da Escola Superior de Saúde do Instituto Politécnico de BragançaPublication . Castro, Cristiana; Martins, Joana; Nunes, Miranda; Sousa, Filomena; Antão, CelesteA automedicaçao é um fenómeno mais ou menos frequente e usado há muitos anos e a sua incidência e distribuição é relatada por organizações de saúde. Na opinião de Medeiros (2011) esta prática consiste no consumo de medicamentos com o objetivo de tratar e aliviar sintomas de doença bem como promover a saúde sem recurso à prescrição médica. Métodos: trata-se de um estudo quantitativo, observacional descritivo e transversal. Foi usado um questionário construído para o efeito, Objetivo: Avaliar se a automedicaçao é uma prática usada pêlos estudantes da Escola Superior de Saúde (ESSa) do Instituto Politécnico de Bragança e identificar ainda os motivos que levam a esta prática. A amostra foi constituída por 219 estudantes da ESSa. Para a análise dos dados utilizou-se o programa excel. Res.ultad.°s: al"'evalência da autome(l":a<;ao foi de 98%. Os medicamentos mais usados. analgésicos e antipiréticos com respostas de 86%. A razão mais apontada para o recurso a prática da automedicaçaofoi um "problema de saúde ligeiro" (79, 5). Foi considerada uma prática de risco por 77% dos estudantes. Conclusões: a automedicaçao é uma prática evidente nos alunos da ESSa. Estes resultados revelam alguma contradição e preocupação na medida em que apesar dos estudantes reconhecerem ser uma prática arriscada ela é praticada por muitos dos inquiridos.
- A Critical Review of Emerging Solutions for Food Packaging: Opportunities and ChallengesPublication . Martins, Joana; Garcia, Juliana; Guimarães, Rafaela; Gouvinhas, Irene; Alves, Maria José; Saavedra, Maria JoséThe environmental impact of conventional plastics has driven a shift toward biobased food packaging, shaped by consumer expectations, market trends, and regulatory policies within the European Union (EU). Despite extensive research on biopolymers such as starch, cellulose, chitosan, and polylactic acid (PLA), their use in commercial food packaging remains limited. A major challenge identified in the literature is the evaluation of biopolymer performance, in which environmental benefits are often considered independently of mechanical, barrier, and economic factors. This review addresses this gap by critically exploring the functional performance of biopolymers regarding their chemical structure and processing methods, with particular emphasis on the role of bioactive compounds in enhancing these materials’ properties. Although several biopolymers can achieve tensile strength values comparable to conventional petroleum-based plastics, their higher water vapor transmission rates remain an unsolved barrier to scalability. These limitations, together with challenges related to mechanical performance and production costs, are discussed to clarify their impact on industrial feasibility and to identify priorities for future research supporting scalable, cost-effective, and regulatory-compliant food packaging solutions.
- European grapevine moth and vitis vinifera l. phenology in the Douro Region: (A)synchrony and climate scenariosPublication . Reis, Samuel; Martins, Joana; Gonçalves, Maria de Fátima; Carlos, Cristina; Santos, João A.The European grapevine moth (Lobesia botrana; Denis and Schiffermüller, 1775) is considered a key pest for grapevine (Vitis vinifera L.) in the Douro Region, Portugal. The phenology of both the grapevine and the pest has changed in the last decades due to the increase in temperature. Here, we assess the potential impact of climate change on the (a)synchrony of both species. The results show that the phenological stages (budburst, flowering and veraison) undergo an advancement throughout the region (at an ~1 km resolution) under a climate change scenario (Representative Concentration Pathways, RCP8.5) for the period 2051–2080, with respect to the historic period (1989–2015). For cv. Touriga Nacional and Touriga Franca, the budburst advances up to 14 days, whereas for flowering and veraison the advancements are up to 10 days (mainly at low elevations along the Douro River). For the phenology of Lobesia botrana, earliness was also verified in the three flights (consequently there may be more generations per year), covering the entire region. Furthermore, the third flight advances further compared to the others. For both varieties, the interaction between the third flight (beginning and peak) and the veraison date is the most relevant modification under the future climate change scenario (RCP8.5, 2051–2080). The aforementioned outcomes from the phenology models help to better understand the possible shifts of both trophic levels in the region under future climate, giving insights into their future interactions.
- Multidrug-Resistant Escherichia coli Accumulated by Freshwater Bivalves: An Underestimated Risk for Public Health?Publication . Martins, Joana; Gonçalves, Ana; Fernandes, Conceição; Cabecinha, Edna; Monteiro, Sandra Mariza; Guedes, Hugo; Almeida, Gonçalo; Garcia, Juliana; Silva, Gabriela Jorge da; Varandas, Simone; Saavedra, Maria JoséAs bioindicators, freshwater bivalves are crucial for the assessment of the contamination impact on different levels of biological integration. Escherichia coli is used as a bioindicator of water fecal contamination, representing a critical global concern, especially with the rise of multidrugresistant (MDR) strains. Phylogenetic diversity, pathotypic characterization, and antibiotic resistance profiles of E. coli isolated from freshwater bivalves (Anodonta anatina) were assessed. Samples were collected from the Tua River in Northern Portugal, from two different sites, Chelas and Barcel, representing different degrees of contamination. Antimicrobial susceptibility testing was performed by the disk diffusion method, and characterizations of the phylogenetic groups and pathotypes were assessed by PCR-multiplex and real-time PCR-multiplex, respectively. Results showed that 60% of isolates were characterized as MDR, including resistance to carbapenems, considered the last resort against multidrug-resistant bacteria. Within this study, it was also possible to verify the antimicrobial resistance (AMR) profile differences between the two sampling sites, with bivalve isolates from the Chelas site showing a higher percentage of antibiotic resistance. Among the E. coli isolates, the highest prevalence (55%) was observed in group B1, followed by group D or E (15%), group A (10%), and group E or Clade I (10%). None of the isolates were classified as diarrheagenic E. coli (DEC). This work highlights the potential transmission of antimicrobial-resistant bacteria through bivalves in the food chain. The ‘One Health’ approach is crucial for combating antimicrobial resistance, namely in edible freshwater species, emphasizing active surveillance to protect human, animal, and environmental health against the spread of antibiotic-resistant bacteria in aquatic environments.
- Plant-Derived Bioactive Compounds: One Health PerspectivePublication . Gonçalves, Ana Carolina Almeida ; Pinto, Ana R.; Cima, André; Olo-Fontinha, Eva; Martins, Joana; Garcia, Juliana; Lemos, André; Saavedra, Maria José; Pintado, Maria Manuela; Alves, Maria JoséThis review, within the One Health framework, compiles information on plant-derived bioactive compounds and emphasises their multifunctional role in improving environmental, animal, and human health. These compounds support sustainable health and ecological stability by influencing biological and environmental processes. Data from literature research are combined to explain the mechanisms and potential uses of different key bioactive compounds. Mechanistic insights focus on their capacity to regulate oxidative stress, inflammation, and microbial balance, linking these effects to therapeutic benefits in human health, enhanced animal productivity, and environmental sustainability. These compounds show antioxidant, anti-inflammatory, antimicrobial, and metabolic activities, helping prevent chronic diseases, strengthen immunity, and reduce reliance on antibiotics and pollution. Examples like quercetin, resveratrol, and curcumin demonstrate their roles in modulating inflammatory and metabolic pathways to foster sustainable health and ecological balance. Bioactive compounds are linked to the One Health strategy, providing benefits across biological systems. Nonetheless, challenges such as variability, bioavailability, and standardization remain. Future directions should aim to develop sustainable extraction and formulation methods, leverage omics technologies and artificial intelligence for discovery and characterization, and foster industry partnerships to validate these compounds and secure global regulatory approval.
- Self-medication on the students of the school of health from Polytechnic Institute of BragançaPublication . Castro, Cristiana; Martins, Joana; Nunes, Miranda; Sousa, Filomena; Antão, CelesteThe self-medicatíon is a phenomenon more and more frequent and used for several years already, and tts incidence and dlstribution are related wtth the organizatíon and health system of each country. Following Medeiros thoughts (2011), this practíce conststs in the consumptíon of a medicine with the purpose of treating or relieving the symptoms and diseases or even promote self health, without using a professional prescription. Methods: With thts study, we intend to find the self-medication practice incidence on the students in the School of Health of Polytechnic Institute of Bragança (ESSa), identify the motives that lead these students to resort to this methods and identify the most used medicatíons. lt's a transversal descriptive, observational and quantítative study. To obtain the best results it was applied a questíonnaire built for that purpose. The statístícs analyses was made using Excel program. Our sample hás 219 students of the School of Health from Polytechntc Instítute of Bragança. Results: The studied sample includes 194 female and 25 male students distributed as follows: 36 frequenting Biomedical Laboratory Sdences, 26 Dietetics and Nutrition, 99 Nursing, 33 Gerontology and 22 studying Pharmacy. The self-medicatíon prevalence was 98%. The most used medicines was the analgesics and antipyretics with 86%. The most prevalent reason for the use of self-medicatíon was the thought that the disease was a "minor health issue". It was also considered a risky practice by 77% of the students. Conclusions: The self-medication is an evident practíce on the ESSa students. This results reveal some contradiction stnce the most consider 1t as a risky practíce, however it is, stíll, practíced.