CERNAS - Artigo em revista científica, não indexada ao WoS/Scopus
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- Adhesives from liquefied eucalypt bark and branchesPublication . Esteves, Bruno; Cruz-Lopes, Luisa; Fernandes, Ana Paula; Martins, Jorge Manuel; Domingos, Idalina; Ferreira, José; Silva, Silvia Helena Fuentes; Labidi, JalelAdhesives made from lignin are one of the most promising alternatives to common ureaformaldehyde adhesives. One of the possible sources is from wood or bark liquefaction at low temperatures and pressure. The possibility of using forest wastes for the production of adhesives was the objective of this work. Eucalypt bark and branches are wastes produced in the company Pedrosa & Irmãos, which is a forest management company based in Portugal (Leiria). The wastes were liquefied with polyalcohols catalyzed by sulfuric acid. The water insoluble fraction of the liquefied material was used for the production of the bio-adhesive. Both fractions were characterized and the bonding performance of the bio-adhesive was tested by ABES. The bio-adhesives obtained from bark or branches were similar, exhibiting a bonding strength approximately half of the conventional UF resin.
- Avaliação de impacte ambiental da gestão de resíduos da produção de uma bancada com base na abordagem de ACVPublication . Silva, Luiza; Ferreira Silva, Maria Elisabete; Brás, Isabel; Domingos, Idalina; Ferreira Wessel, Dulcineia; Ferreira, JoséIntroduction: Consumerism has led to an increase in environmental problems, and for this reason, sustainable solutions must be the priority when designing new products or services. Life Cycle Assessment (LCA) is one of the most important analytical tools available for choosing the best decision when it comes to sustainability. Objective: The focus of this study was to apply an LCA to the management of wastes from a kitchen/bathroom countertop production. The waste management scenarios studied were landfill (current practice) and waste recycling. The panel consists of a ceramic layer on a lamellar panel substrate, formed by glassliner and PVC, which is intended to be resistant to water, scratches and impacts. The residues generated from the panel production are glassliner and PVC plastics and ceramics. Methods: The LCA methodology was followed and the EPD 2018 method available in the SimaPro software was chosen to quantify the environmental impacts of waste management. The environmental impact categories studied were eutrophication, global warming, photochemical oxidation, ozone layer depletion, abiotic depletion and acidification. Results: The results showed that the two plastic wastes are the main contributors to acidification, eutrophication and global warming. However, for photochemical oxidation and water scarcity, the ceramic component residue is the main contributor. Comparing the two scenarios, waste recycling reduces the impacts in all environmental impact categories, in comparison with landfill. Conclusion: Recycling the residues from the production of panels brings improvements in environmental impacts in all categories analyzed.
- Colaborative integrated learning: study case of aplication to food engineeringPublication . Guiné, RaquelIntroduction: Collaborative learning comprises a set of teaching/learning methods in which students are stimulated to work together in order to fulfil a common learning goal. This approach has been adopted throughout a very wide variety of disciplines, curricula, school environments, teaching approaches or age groups. Objectives: The objective of this work was to discuss the advantages and drawbacks of using innovative learning tools or techniques to promote active learning from a real practice experience. Methods: The integrated learning on subjects in area of Food Engineering was analysed based on the learning outcomes, advances of collaborative work, difficulties found, problem solving strategies and learning assessment limitations. Results: The results obtained allowed concluding that the integrated project developed in the 3 different syllabus is beneficial and the students tend to engage in the requested activities with true commitment; this approach allows the development of complementary competences and far beyond simple knowledge; and finally, it prepares the students for real life experiences, while guarantying a fair evaluation of learning outcomes for all while still at university. Conclusions: This work highlighted the need to deepen the debate on this topic in order to improve students’ knowledge and learning skills.
- Comparative study about some eating habits in six countries: eating out and fast food consumptionPublication . Guiné, Raquel; Florença, S. G.; Leal, M.; Rumbak, I.; Komes, D.; Saric, M. M.; Tarcea, M.; Fazalas, Z.; Szucs, V.; Klava, D.; Straumite, E.; Baric, I.Poor diets have proven very detrimental for the maintenance of good health and eating an excessive amount of fast food and highly processed meals can harm the general health status of the population. Hence, this work investigates the habits related to eating outside the home and frequency of eating fast food meals in participants from six different countries. A cross-sectional descriptive study was undertaken on a sample of 4,904 adult participants. For the data treatment, basic statistics were complemented with tree classification analysis, using the CRT algorithm. This study concluded that in the sample under study the frequency of eating out of home was in general low, corresponding to four or fewer times per week for 71.9% of the participants, and the consumption of fast food meals was also acceptable, i.e., with a low frequency of up to two times per week in 88.6% of the respondents. The biggest differences were encountered when comparing participants from different age groups, countries or sexes, and not so much for living environment or education level. Tree classification analysis highlighted the relative importance of the considered factors for eating out and fast food meals, being country and age confirmed as the most influential factors. In the evaluated sample the incidence of eating out and fast food meals were low, which is a good indicator to contribute globally for the good health status of the participants involved in the study.
- Consumption of fibre rich foods: comparative study in different countriesPublication . Guiné, Raquel; Florença, SG; Leal, M; Rumbak, I; Baric, I; Komes, D; Satalic, Z; Saric, M; Tarcea, M; Fazakas, Z; Szucs, V; Harangozó, J; Klava, D; Straumite, EFoods such as fruit, vegetables, and cereals, and particularly whole grain, are rich in dietary fibre and have been proved to have multiple beneficial effects for the human health. The present research was designed to assess some eating practices related to fibre-rich foods in different countries, namely Argentina, Croatia, Hungary, Latvia, Portugal, and Romania. A cross-sectional descriptive study was undertaken on a sample of 4905 adult participants, obeying all ethical guidelines for this type of research. Regarding the data treatment, basic statistics was complemented with the tree classification analysis. Generally, the results show a low consumption of salads and vegetables, i.e., up to 11 servings/week (for 78.2% of participants), with Croatia in the lead (86.6%). Regarding fruit, a great majority of data also indicated low consumption (92.3%), most especially for Latvia (98.3%). The level of consumption of whole cereals was also low (72.6%), particularly for Latvia (90.0%). The tree classification analysis showed that while the first discriminant variable for the consumption of salads and vegetables was country, followed by education, for the consumption of fruit, it was country and then sex, and finally, for the consumption of whole cereals, it was sex and followed by country. The results allowed the conclusion that the consumption of foods rich in dietary fibre was very low for these countries, highlighting the necessity to implement strategies that incentivise the consumption of such foods, which are very important for a healthy diet.
- Evolution of land use environmental impact of eucalyptus globulus in the context of life cycle assessmentPublication . Ferreira, José; Esteves, Bruno; Domingos, IdalinaIntroduction: The eucalyptus globulus forest area in Continental Portugal has shown a systematic increase over the last 50 years. In 20015 it was the species with the highest forest land occupation representing 26.2% of the total Portuguese forest area. Although between 2005 and 2015 the occupation of the soil by eucalyptus globulus had grown about 7.5%, the existing volume increased slightly 0.2%. The wildfires had a strong impact on this with a total burnt area of 1.1 million hectares during this period. Objective: Due to its economic value (national leader in exports of high added value) and social (contributes to the generation of thousands of jobs) this study aims to assess the evolution of the environmental impact of eucalyptus globulus on the land use between 2005 and 2015. Methods: The life cycle assessment methodology is followed and the ILCD 2011 Midpoint+ method available in the SimaPro software was chosen to assess the land use environmental impact. Results: Land use impact category of 1 m3 of eucalyptus globulus trees, standing, in forest, was 21832 Kg C deficit in 2005 and 23430 Kg c deficit in 2015 that means an increased about 7.3% during this period. Conclusion: Transformation to forest road (from natural forest) is the process that most contributes for the land use impact with approximately 78%. Forest occupation is the second most important process representing about 19.5% of the total impact category and forest road occupation represents only 3%.
- Food Habits and Knowledge Related with Meat on a Sample of Portuguese ConsumersPublication . Guiné, Raquel P. F.This research was based on a questionnaire applied to a sample of Portuguese consumers. Most participants agreed that the influence of meat consumption on human health depends on the amount consumed, while practically none believed that meat is bad for health. Regarding knowledge, it was observed that 33% did not believe that cattle production is harmful to the environment; 51% believed that red meat contributes to an increase in blood cholesterol; 31% thought that red meat is richer in protein than white meat; and 30% did not believe that pork meat is harmful to health. As for the preferences for meat in Portugal, chicken was the most preferred, followed by turkey, and then pork. The least preferred meats are horse, goat and sheep. We concluded that white meat is preferred by the participants who tend to reduce the consumption of red meats
- Hazelnut: A Valuable ResourcePublication . Guiné, Raquel; Correia, PaulaHazel (Corylus avellana L.) nutshell is one of the most consumed and most appreciated nut fruit all over the world. It is believed to have constituted a basic food in early prehistory, in temperate zones of the globe, such as for example Europe. Presently the hazelnut production is mainly concentrated on the Black Sea coast of Turkey, but other countries are also important producers, like for example Portugal, situated on the western Europe, in the Iberian Peninsula. The objective of this work is to make a review about the worldwide importance of hazelnut, their usages, including gastronomic and industrial applications, as well as some ways that allow adding value to this fruit, making it an even more valuable resource. The advantages include higher income for produces, lower environmental impacts and valorisation of residues improving sustainability and providing valuable products for consumers and/or ingredients to incorporate into those products.
- A importância das certificações ecológicas e das TIC na promoção do turismo sustentável: estudo de caso de uma unidade de turismo ruralPublication . Pato, LúciaIntrodução: Numa era de problemas ambientais crescentes, a conduta sustentável dos empreendimentos de turismo, em particular do turismo rural, assume hoje uma importância fulcral. Uma boa parte do mercado tende efetivamente a procurar um empreendimento “amigo do ambiente” e socialmente responsável. Daí que as tecnologias de informação e comunicação (TIC), sejam fundamentais para a transmissão destes princípios. Com efeito não só promotores, mas também empresas de e-commerce no ramo das viagens tomam consciência desta realidade e necessidade, tentando comunicar habilmente a respetiva oferta turística sustentável. Um exemplo notável que realça a importância da sustentabilidade ambiental e social e as mais valias da utilização das TIC, está localizado na Região Viseu Dão-Lafões (RVDL), mais precisamente numa das comunidades mais interiores da mesma. Objetivos: Tomando como unidade de análise um empreendimento de turismo rural na RVDL, o objetivo deste estudo é explorar a importância das estratégias de sustentabilidade e das TIC na entrega e promoção do produto turístico. Métodos: De forma a permitir uma análise mais profunda, utiliza-se uma metodologia de estudo de caso. Para além de uma entrevista semiestruturada recorre-se à observação e análise da página web do empreendimento e a outros documentos eletrónicos. Resultados: Na génese e desenvolvimento deste empreendimento houve sempre uma preocupação com o ambiente e com a comunidade. Daí que o empreendimento esteja em processo de certificação pela Biosphere e Green Key. Seja no desenvolvimento e atualização da página web, redes sociais, resposta a avaliações no TripAdvisor e no Booking.com e atualização de canais de divulgação quando são feitas reservas, a promoção/comunicação da oferta turística mais sustentável através das TIC, ocupa a maioria do tempo que a promotora dedica ao empreendimento. Conclusões: A existência de uma conduta ambiental por parte do empreendimento de turismo rural, e a comunicação dessa conduta, assume-se como um ingrediente fundamental para o sucesso da atividade turística do empreendimento. Paralelamente isto é fundamental para a atração de um novo turista mais preocupado com as questões ambientais.
- Learning Performance and School Dropout in Higher EducationPublication . Ferreira, Manuela; Cabral, L.; Campos, Sofia; Duarte, João; Margarida Correia Balula Chaves, Cláudia; Guiné, Raquel
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