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- Benzimidazole Schiff base copper(II) complexes as catalysts for environmental and energy applications: VOC oxidation, oxygen reduction and water splitting reactionsPublication . Paul, Anup; Silva, Tiago A. R.; Soliman, Mohamed M. A.; Karacic, Jozo; Sljukic, Biljana; Alegria, Elisabete; Khan, Rais Ahmad; Guedes Da Silva, M. Fátima C.; Pombeiro, ArmandoThe new copper(II) complexes [Cu(mu-1 kappa O:2 kappa ONN'-HL1)(mu-1 kappa O:2 kappa O'-NO3)](2)center dot[Cu(mu-1 kappa O:2 kappa ONN'-HL1)(CH3OH)](2)(NO3)(2) (1) and [Cu(kappa ONN'-HL2)(mu-1 kappa OO':2 kappa O'-NO3)](n) (2), derived from the new pro-ligands H(2)L1 = 2-(5,6-dihydroindolo[1,2-c]quinazolin-6-yl)-5-methylphenol and H(2)L2 = 2-(5,6-dihydroindolo[1,2-c]quinazolin-6-yl)-4-nitrophenol, were synthesized and characterized by elemental analysis, FT-IR, ESI-MS, and their structural features were unveiled by single-crystal X-ray diffraction analysis. This discloses a dimeric structure for 1 and a polymeric infinite 1D metal-organic chain for 2. The complexes were evaluated as catalysts for the oxidation of toluene, a volatile organic compound (VOC), and for oxygen reduction and water splitting reactions. 1 exhibits a higher activity for the peroxidative conversion of toluene to oxygenated products (total yields up to 38%), whereas 2 demonstrates a superior performance for electrochemical energy conversion applications, i.e., for oxygen reduction (ORR), oxygen evolution (OER) and hydrogen evolution (HER) reactions in an alkaline medium in terms of higher ORR current densities, lower Tafel slope (73 mV dec(-1)) and higher number of electrons exchanged (3.9), comparable to that of commercial Pt/C. Complex 2 also shows a better performance with lower onset potential and higher current densities for both OER and HER when studied as electrocatalyst for water splitting.
- The role of social media in the proliferation and promotion of Brand ActivismPublication . Miguel, Alexandra; Miranda, SandraDespite the relevance and actuality of brand activism, there are few theoretical investigations about the origins of this concept, and particularly about the role that social networks played in its proliferation and encouragement. This systematic literature review, based on the most prominent articles published in this field of expertise, investigates and discusses the role of technological advances, and particularly the role of the popularization of the use of social networks, in the proliferation of brand activism worldwide. Likewise, the concept of brand activism as a new trend in strategic communication between brands and stakeholders is explored, giving real examples of brand activism campaigns to present a current picture of the application of this concept, both online and offline.
- Publicidade: novos formatos, novos conteúdosPublication . Verissimo, Jorge; Balonas, S.Este artigo apresenta-nos, por um lado, as intenções dos editores com este número temático, por outro, uma introdução aos textos aqui publicados. No que concerne ao primeiro intento, os editores pretendem, acima de tudo, estimular o debate em torno da publicidade, refletindo sobre a sua capacidade de adaptação aos desafios societais e tecnológicos, sem esquecer as tendências que o discurso publicitário anuncia ou incorpora. Quanto ao segundo, os editores do dossier “Publicidade: novos formatos, novos conteúdos” apresentam os vários contributos de investigadores que procuram espelhar a contemporaneidade através da publicidade, revelando que esta se continua a afirmar enquanto discurso e enquanto técnica no ecossistema comunicacional.
- Effects of listening to music on patients who undergo bone scintigraphyPublication . Boal, Maria Ferreira; Vieira, Lina da Conceição Capela Oliveira; Guerreiro, Tiago João VieiraAbstract Problem definition: One of the most relevant oncology diseases is breast cancer, with an incidence of 12.0% in Portugal in 2018. Breast Cancer has a high rate of bone metastasis, so patients undergo bone scintigraphy for the detection of bone metastases due to its high sensitivity. Although this exam is almost routine for these patients, they still feel anxiety when they undergo it. There are many methods of reducing anxiety described in the literature, the most studied being listening to music. To our best knowledge, a study assessing whether listening to music contributes to anxiety reduction in patients undergoing bone scintigraphy has not yet been carried out. Aim: This study aims to evaluate the effect of listening to music during bone scintigraphy on the level of anxiety in patients with breast cancer. Methodologies: Exploratory, quasi-experimental study where 15 participants were included in the control group and 15 in the experimental group. Both underwent bone scintigraphy. The patients included in the experimental group listened to music during the image acquisition while the ones included in the control group did not. All patients answered to the pre-exam and post-exam questionnaires, as well as the State-Trait Anxiety Inventory questionnaire before scan and after scan, and physiological measures were also measured pre-exam and post-exam. Wrist accelerometers were used four days before the exam. Results: Our results show that blood pressure values were elevated pre- and post-exam and that STAI scores decreased after the exam in both groups. We also established statistically significant differences post-exam between the groups in relation to heart rate and oxygen saturation in the blood. Additionally, with statistical significance, a strong correlation between STAI pre-scan and diastolic blood pressure for the control group, and a moderate correlation between STAI post-scan and respiratory rate for the experimental group were discovered. Furthermore, we found that the day before the exam participants have more sleepy periods during the day and stay in these periods for a longer duration compared with the other days. Conclusion: In conclusion, listening to music to reduce patients' anxiety during bone scans seems to be a good method, considering that patients who reported feeling anxious in the experimental group, mostly stated that listening to music helped reduce anxiety and that STAI scores and systolic blood pressure decreased after the intervention.