Instituto Politécnico de Viseu

Scientific Repository

Welcome to the Polytechnic Institute of Viseu Institutional Repository

The aim of this Repository is to give greater visibility to the scientific production of the academic community of the Polytechnic Institute of Viseu, by increasing the impact and use through Open Access, ensuring the storage and preservation of all research produced in its organic units and research centres.

Tel +351 232 419 035

Email repositorio@sc.ipv.pt

Recent Submissions

Sustainability of edible insects: insights from a sample of Portuguese citizens

Publication . de Pinho Ferreira Guiné, Raquel; Florença, Sofia de Guiné e

2025-10Conference proceedings

Open access

Sustainable and healthy diets in Portugal

Publication . Florença, Sofia de Guiné e; de Pinho Ferreira Guiné, Raquel

2025-10Conference proceedings

Open access

Contemporary challenges in foreign language learning in higher education: rethinking the interactions between digital tools, cultural intelligence and cognitive load for a balanced active pedagogy

Publication . Delplancq, Véronique; Costa Lopes, Ana Maria; Pereira, José Manuel de Almeida; Gillain, Romain; Fidalgo, Susana; IJAR

The use of digital tools in foreign language learning in higher education raises many pedagogical challenges, particularly in terms of the skills to be developed, vital for society and the labour world, while simultane ously managing the cognitive load of students. Based on the results of experiments carried out with undergraduate Media Studies students at the Escola Superior de Educação de Viseu(Portugal), the paper questions the effects of applying active pedagogies using digital tools upon the acquisition of these competences, with particular focus on cultural intelligence, while keeping students' cognitive load balanced. Results show that pedagogical activation can favour the development of diverse competences and cognitive processes, but presents risks, namely overload in the case of poorly planned activities. The article aims to contribute to the design of balanced, rich and cognitively sustainable pedagogical devices, contributing to an active pedagogy with the integration of the digital tools.

2025-10Text

Open access

Liability for error and right of repair - consequences of a legal imperative

Publication . Carvalho, Ana Branca at all

The DIRECTIVE (EU) 2015/2302 OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 25 November 2015 on Package Travel and Linked Travel Arrangements, amending Regulation (EC) No 2006/2004 and Directive 2011/83/EU of the European Parliament and of the Council and repealing Council Directive 90/314/EEC. Only the combination of different types of travel services, such as accommodation, carriage of passengers by bus, rail, water or air, as well as rental of motor vehicles or certain motorcycles, should be considered for the purposes of identifying a package or a linked travel arrangement. The Directive lays down a number of important consumer rights in relation to package travel, in particular with regard to information requirements, the liability of traders in relation to the performance of a package. Speaking of the dynamics of the law, driven by the one of the society, obviously they have developed a real research lab of the liability, culminating (at European level) with concerns to find a common denominator through the establishment of the liability of the European law resulting from primary and derivative law of the European Union. The approach is not at all easy and not too soon achievable. Those forms are dominated also by the common idea of repairing the caused damage (ANTUNES 2011). The liability of economic agents, reducing bureaucracy, facilitating access to the activity in order to be more competitive services and new markets, the introduction of faster and dematerialized procedures and tacit approval, are expressly set out objectives in the preamble to the Directive. The DIRECTIVE (EU) 2015/2302 OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 25 November 2015 on Package Travel and Linked Travel Arrangements, amending Regulation (EC) No 2006/2004 and Directive 2011/83/EU of the European Parliament and of the Council and repealing Council Directive 90/314/EEC. Using content analysis, through documentary descriptive research and rich analysis of the specialized literature, this study aims at identifying the contents of the above mentioned concepts, presenting a point of view on the regarded issue.

2017Book part

Open access

The future of pulsed electric fields in microgreen production: a comparative study

Publication . Santos, Mafalda de Aguiar Macedo e Ferreira dos; Costa, Daniela de Vasconcelos Teixeira Aguiar da; Guiné, Raquel de Pinho Ferreira; Redondo, Luís Manuel dos Santos

Abstract: Global demographic trends and increasing societal awareness of the need for sustainable, functional, and safe food products pose significant challenges to achieving the Zero Hunger goal proposed in the United Nations’ Agenda 2030. This reinforces the urgency of addressing contemporary issues in food systems. A combination of heritage farming practices and innovative technologies is crucial to overcoming these challenges. Pulsed Electric Fields (PEF), a sustainable, non-thermal, and purely physical technology, has shown potential to optimise and modulate germination, growth, and the physicochemical and nutritional properties of plants derived from PEFprimed seeds. This study investigates the effects of PEF seed priming on the growth and quality of microgreens of three species: Beetroot, Arugula, and Basil. A comparative analysis was conducted using Control and three PEF protocols (PEFA: 2 kV/cm, PEFB: 3 kV/cm, and PEFC: 4 kV/cm), examining physiological, biochemical, and sensory parameters. Key data collected during the first five days of germination included water uptake, electrical conductivity, radicle length, and germination indices. Following harvest, microgreens were analysed for Total Phenolic Compounds (TPC), antioxidant capacity (DPPH & ABTS), Total Soluble Solids (TSS), pigments (Chlorophylls & Carotenoids), and nutritional composition (macronutrients and amino acids) via FT-NIR. Photosynthetic pigments increased in Basil microgreens but decreased in Beetroot and Arugula. Sensory analysis was also conducted, using Quantitative Descriptive Analysis (QDA). Beetroot showed up to a +15% increase in TPC for PEFB and up to +12% improvement in antioxidant capacity (DPPH; PEFC), especially with ultrasound extraction (US). Arugula presented a +5% increase in DPPH antioxidant activity (PEFC). TSS increased by up to +7.5% in Beetroot (PEFC) but decreased by around 3 to 4% in Arugula. Extraction efficiency differed between Magnetic Stirring (MS) and US, with ultrasound generally yielding higher rates (p<0.001). In Basil, DPPH and ABTS scavenging assays presented distinct results, suggesting that the impact on ABTS-reactive compounds is not as dependent on PEF seed electropriming as DPPH. With respect to Nutritional Content, Fat and Protein increased in Beetroot (Fat: +41%, Protein: +34%) and Arugula (Fat: +91%, Protein: +11%) treated with PEFC. PEFB led to an increase in Starch in all species. Crude Fiber and Neutral Detergent Fiber decreased amongst all species. Methionine rose by 100% in Beetroot treated with PEFC. Although not statistically significant, sensory analysis revealed small increases in Sweet (Beetroot) and Aroma Intensity (Arugula), along with a reduced perception of the descriptor Hot in Arugula. Results demonstrated that PEF treatments significantly influenced water uptake, electrical conductivity, radicle length, and nutritional composition. Species-specific responses to different PEF protocols were observed. Optimal protocols appear to be PEFC for Beetroot, PEFB for Arugula, and PEFA/B for Basil. These findings not only suggest the potential of PEF as a tool for enhancing/modulating microgreen quality and nutritional profiles but also open the door for its utilisation in a wider agricultural context.

2025-09-18Master thesis

Open access