Browsing by Issue Date, starting with "2022-06"
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- Práticas de recursos humanos e motivação laboral: uma análise à luz da teoria da autodeterminaçãoPublication . Silveira, Carolina; Lopes, Sílvia; Rodrigues, Anabela; Dias, Paulo C.A temática das práticas de Recursos Humanos (RH) e motivação laboral contempla dois aspetos com relevância na vida profissional das pessoas. As práticas de RH revelam bastante importância para o bom funcionamento das organizações. Por sua vez, a motivação laboral baseiase nas razões que levam o colaborador a exercer uma determinada função, podendo estas razões assumir uma natureza de motivações intrínsecas e/ou extrínsecas ou verificar-se a ausência de motivação. As motivações intrínsecas implicam realizar um trabalho por uma questão de gosto genuíno ou por considerar pessoalmente importante esforçar-se no trabalho. As motivações extrínsecas consistem em realizar um trabalho porque as pessoas sentem que se não se esforçarem o suficiente podem ficar desempregadas. A ausência de motivação no trabalho implica as pessoas não verem razões para se esforçar pelo mesmo. Com uma amostra de 154 trabalhadores portugueses, testou-se a relação entre a perceção das práticas de RH e a motivação laboral. As Práticas de RH foram medidas através da Human Resources Practice Measure de Sobral et al (2019). As motivações foram medidas através da Multidimensional Work Motivation Scale de Gagné et al. (2015). Os resultados da investigação permitiram observar que quanto mais positiva a perceção das Práticas de RH, menos ausência de motivação e menos razões de motivação extrínseca, por parte dos colaboradores. Adicionalmente, foi possível observar que uma perceção mais positiva das Práticas de RH parece contribuir para aumentar a motivação dos colaboradores por razões intrínsecas. As implicações teóricas e práticas destes resultados serão discutidas.
- Impact of simulated in vitro gastrointestinal digestion on bioactive compounds, bioactivity and cytotoxicity of melon (Cucumis melo L. inodorus) peel juice powderPublication . Gómez-García, Ricardo; Vilas-Boas, Ana A.; Machado, Manuela; Campos, Débora A.; Aguilar, Cristóbal N.; Madureira, Ana R.; Pintado, ManuelaThe objectives of this research work were to evaluate the effect of in vitro gastrointestinal digestion (GIT) on melon peel juice (MPJ) powder from fruit processing industry by-products, considering (i) the recovery and accessibility indexes, (ii) the changes on antioxidant activity, and (iii) the prebiotic effect. Throughout exposition to GIT conditions a decrease on the total phenolic content (TPC = 65.31%) and antioxidant activity by ABTS = 39.77% and DPPH = 45.91% were observed. However, these both parameters exhibited stable accessibility, accounting with 81.89%, 76.55%, and 54.07% for TPC, ABTS and DPPH, respectively. After gastrointestinal digestion, the non-absorbed fraction exhibited a positive impact on the growth of Bifidobacterium and Lactobacillus strains, possibly associated with the high content of simple sugar (glucose and fructose). This fraction also showed to be safe on Caco-2 intestinal cells. These findings suggest that MPJ might be used as a potential food functional ingredient.
- Generalized problematic internet use, emotional regulation and self-esteem in adultsPublication . Maia, B. R.; Morgado, P.Introduction: Many internationally studies, in the last two decades, found problematic internet use associated with a variety of psychosocial problems, but in Portugal this is a recent research question specially in adults. Objectives: To explore the relationship between problematic Internet use, emotional regulation and self-esteem. Methods: 138 Portuguese subjects (77.5% females), with a mean age of 27.76 years old (SD = 8.98, range: 18-58) filled in the Portuguese versions of the Generalized Problematic Internet Use Scale-2, the Difficulties in Emotion Regulation Scale and the Rosenberg Self-Esteem Scale. Results: Negative consequences subscale of generalized problematic internet use was positively correlated with all the emotional regulation difficulties subscales and negatively with Self-Esteem, and positively with daily hours of internet usage. A similar result was found for Self-Deficient Regulation subscale, except for Clarity subscale. Mood Regulation was correlated with Strategies, Goals and Self-Esteem. Males showed higher levels of Negative Consequences. Age and age onset of Internet use were negatively correlated with Mood Regulation, Self-Deficient Regulation and Negative Consequences. A statistically significant difference in Mood Regulation, Self-Deficient Regulation and Negative Consequences in marital status levels, and in professional situation, with higher median scores in divorced and single without a relationship and in student subjects; no significant differences were found in educational level. Conclusions: Generalized problematic Internet use, especially their Negative Consequences, is associated with higher emotional dysregulation, low self-esteem, lower age and lower age of Internet onset, being divorced or single without a relationship and being student, and it is more prevalent in males.
- European sovereignty indexPublication . European Council on Foreign Relations; Franco, Lívia
- Clean technologies for production of valuable fractions from sardine cooking wastewaters: an integrated process of flocculation and reverse osmosisPublication . Pereira, Maria João; Grosjean, Oceane; Pintado, Manuela; Brazinha, Carla; Crespo, JoãoThe increase in environmental consciousness and stricter regulations has motivated industries to seek sustainable technologies that allow valorising wastewaters, contributing to the profitability of overall processes. Canning industry effluents, namely sardine cooking wastewater, have a high organic matter load, containing proteins and lipids. Their untreated discharge has a negative environmental impact and an economic cost. This work aims to design an integrated process that creates value with the costly sardine cooking wastewater effluent. The research strategy followed evaluates coagulation/flocculation technologies as pre-treatment of the sardine cooking wastewater followed by reverse osmosis. Two different added-value products were obtained: a solid fraction rich in proteins, lipids (above 20%), and aromas that might be used for feed/pet/aquaculture applications and, from the processing of the resultant aqueous stream by reverse osmosis, a natural flavouring additive, which can be applied in food/feed. Additionally, the permeate from reverse osmosis presents a much lower organic load than the original raw material, which may be reused in the overall process (e.g., as water for washings) or discharged at a lower cost, with environmental benefits and economic savings.
- Extra-short implants in the posterior region: a case series of single and multi-unit fixed prosthesesPublication . Segalla, D. B.; Rodrigues, F.; Villarinho, E. A.; Correia, A. R. M.; Shinkai, R. S. A.Aims: Anatomical and surgical conditions may require the use of implants with reduced length. This study reports a case series of patients treated with single or multi-unit fixed prostheses supported by 4-mm implants in the posterior region. The aim was to describe the success rate up to four years of loading, and the mechanical and biological complications. Materials and Methods: The sample consisted of all patients treated with prostheses supported by 4-mm implants at the Military Policlinic of Porto Alegre, Brazil, between the years 2015 and 2019. The patients were recalled for clinical examination and data collection: The type of prosthesis, maximum bite force, presence of bruxism, peri-implant bone level, and crown-implant ratio were recorded. Results: Eight patients with 19 implants place in pre-molar and molar region were examined. Eleven implants were rehabilitated with single crowns and 8 with splinted crowns. The implant survival rate was 100%, with a mean follow-up of 33.8 ± 10.6 months after surgery. There were 6 (2 non-splinted) cases of prosthetic screw loosening, resulting in a prosthetic complications rate of 27.3%, with an average follow-up of 28.6 ± 10.86 months after prosthesis installation. Conclusions: Within the study limitations, it can be concluded that 4-mm implants show high survival but also relevant occurrence of prosthetic complications.
- Arquivo Maestro Manuel Ivo Cruz: inventário. Biblioteca do Centro Regional do Porto da Universidade Católica PortuguesaPublication . Pinto, Mariana; Pinto, Maria JoãoO Maestro Manuel Ivo Cruz nasceu em Lisboa a 18 de maio de 1935, faleceu no Porto em 25 de dezembro de 2010. Estudou na Faculdade de Letras da Universidade de Lisboa, onde se licenciou em Ciências Histórico-Filosóficas. O primeiro concerto que dirigiu aconteceu no ano de 1954, quando era ainda estudante; para além desta vertente, o maestro destacou-se como docente e investigador na área da musicologia histórica portuguesa.
- High-throughput plant phenotyping: a role for metabolomics?Publication . Hall, Robert D.; D'Auria, John C.; Ferreira, António C. Silva; Gibon, Yves; Kruszka, Dariusz; Mishra, Puneet; Zedde, Rick van deHigh-throughput (HTP) plant phenotyping approaches are developing rapidly and are already helping to bridge the genotype–phenotype gap. However, technologies should be developed beyond current physico-spectral evaluations to extend our analytical capacities to the subcellular level. Metabolites define and determine many key physiological and agronomic features in plants and an ability to integrate a metabolomics approach within current HTP phenotyping platforms has huge potential for added value. While key challenges remain on several fronts, novel technological innovations are upcoming yet under-exploited in a phenotyping context. In this review, we present an overview of the state of the art and how current limitations might be overcome to enable full integration of metabolomics approaches into a generic phenotyping pipeline in the near future.
- Use of dimethylglioxime as a chromogenic agent in a flow-based system for the determination of Ni(II) in recreational waterPublication . Ribas, Tânia C. F.; Mesquita, Raquel B. R.; Rangel, António O. S. S.
- What we should know to design a debunking course: assessing logical thinking and perceptions about the information crisis among college studentsPublication . Campos, IoliVarious reasons have been pointed out for the current information crisis (Wardle, Derakhshan, Burns, & Dias, 2017): the information overload (Moeller, 1999), the post factuality and cultural relativism (McNair, 2018), the collapse of trust (d'Ancona, 2017), the filter bubbles and datafication of our constructed view of the world (Couldry & Hepp, 2018), apart from the political and economic causes. Various fact-checking initiatives have also emerged to tackle the misinformation problem: from online games to educative projects about verification and professional journalism websites dedicated to fact-checking. However, despite being an important tool to fight misinformation, the research tells us that fact-checking alone is far from enough (Ireton & Posetti, 2018). There is a whole body of literature pointing to the psychological dispositions that play a role in the spread of conspiracy theories and misinformation, such as theories of cognitive bias, motivated reasoning and availability heuristic. The concept of media literacy is often associated with critical thinking. However, many media literacy measures do not put as much as an emphasis on logical reasoning, as they put on self-perceived media literacy, perceptions of the value of media literacy (Vraga, Tully, Kotcher, Smithson, & Broeckelman-Post, 2015), knowledge about audiences and reception, message construction, and production (Maksl, Ashley, & Craft, 2015; Primack et al., 2006). Likewise, most surveys done among the Portuguese University students’ population about media literacy focused mostly on media use and civic life (Lopes, 2015), knowledge about the median and message construction (João & Menezes, 2008), and less on cognitive-critical reasoning (Lopes, Pereira, Moura, & Carvalho, 2015). On the other hand, in Portugal, as in many other parts of the globe, the focus of journalism University education is more often on production, media sociology and theories of communication, and less often on media psychology, according to the curricula available on various university websites. Production can easily be learned through traineeships; however, once one enters the journalism job market, one has less time and perhaps less motivation to study and think about the media effects and psychological processes behind information acquisition. This paper aims at examining the use of logical and probability thinking by university students of communication in relationship to their awareness about the information crisis. This study is guided by the need to provide a research-based instructional strategy for the development of a new course on debunking. It does so by surveying a group of 37 Portuguese university students about their use of logic and critical thinking, through a validated scale (Pinker, 2021). Additionally, it assesses the student’s attitudes and perceptions about the problem of fake news through a measure used in a survey already conducted in 27 countries, but not in Portugal (IPSOS, 2018). The results support the argument that to fight the ongoing information crisis, it may also be essential to increase the teaching of critical thinking. This exploratory study contributes to filling a gap in the literature about the use of logical reasoning among communication students and to the wider debate about how we can teach them about debunking.