A poética da luz na arte contemporânea

Mestrado em Criação Artística ContemporâneaA presente dissertação pretende observar e mostrar a luz numa perspetiva de uso artistico; como a vemos, como a sentimos como a vivemos como a usamos na criação artistica. O desenvolvimento do uso da luz negra na arte tem tido uma grande evolução por artistas emergentes. Este trabalho está organizado em capitulos sendo que os primeiros suportam os aspetos historicos e que são parte essencial para o desenvolvimento do projeto, e do decurso deste processo de investigação e experimentação. A motivação para desenvolver este trabalho assenta na necessidade e interesse em explorar novas tecnologias e novos materiais como suporte e meio de expressão, que permitam novas explorações e aplicações diversificadas no contexto da criação artística, principalmente enquanto objeto de novas conceções visuais e plásticas. Assim, tornou-se indispensável investigar novos procedimentos e materiais para ser possível experimentar diferentes tipos de aplicações, criando produtos artísticos diversificados no contexto deste tema. As representações/instalações criadas são peças para ver com e sem luz e com luz negra, que se intitulam: “A poética da luz na arte contemporânea”. As imagens registadas, e integradas na parte prática deste projeto, são fruto do processo de pesquisa e experimentação. A instalação criada como trabalho final pretende colocar a imagem perante perspetivas distintas, em que a luz se apresenta inicialmente como fonte de iluminação para posteriormente dar lugar á luz como material plástico.A This dissertation and watch the light show in a perspective of artistic use, as we see, how we feel like we live like we used in artistic creation. The development of the use of black light in art has been a great evolution for emerging,artists. This paper is organized into chapters and the first support and the historical aspects that are essential for the development part of the project, and during the process of research and experimentation. The motivation to develop this work was/is based on the need and interest in exploring new technologies and new materials as a support and means of expression, which should enable new explorations and varied applications in the context of artistic creation, especially as the object of new visual and plastic/artistic conceptions. Thus, it became pivotal to investigate new procedures and materials to be able to try different types of applications, creating diverse artistic products in the context of this theme. The representations / facilities created are pieces to do with and without light and black light, calling themselves "The poetics of light in contemporary art." The images recorded and integrated into the practical part of this project, are the result of the process of research and experimentation. The installation created as a final project to place the image in different perspectives, in which light initially presents as light source to subsequently give rise to light as plastic

A new insight on synergistic effect between propolis and gentamicin

Apresentação efetuada no 6th International Conference on Agricultural and Biological Sciences (ABS 2020), online, 2020This work was supported by National Funds by FCT - Portuguese Foundation for Science and Technology, with a PhD student grant (PD/BD/128276/2017), under the Doctoral Programme “Agricultural Production Chains – from fork to farm” (PD/00122/2012), and under the project UIDB/04033/2020

Reserva de vagas em universidades públicas estaduais: implicações para a docência universitária

This article is premised on equity of opportunity, because it aims to analyze the articulation between the reserve of vacancies of two public universities and university teaching for pedagogical practices that have the purpose of combating race, social and cultural inequality. To this end, it seeks to articulate the theoretical ideas Rodrigues and Garzón (2012), Mantoan (2013), Pimenta and Anastasiou (2005), Booth and Ainscow (2002), and Sawaia (2014) in the constitution of teachers’ knowledge for teaching with inclusion; as well as the emerging need for overcoming reproduction paradigms, both of the teaching practices and the processes of formation of these teachers. It raises questions such as: How do different conceptions of disability dialogue in the process of teacher in relation to the fight against race, social and cultural inequality? What evidence does the field of university teaching at two public universities say about experiences of vacancy reserves, which lead to the reduction of inequalities among students benefited by affirmative action policies? It has as method of analysis of content of sources that standardizes as quoted in the University, being searched: Vale do Acaraú State University UVA), Sobral, Ceará and State University of Rio de Janeiro (UERJ), Rio de Janeiro, RJ. Evidence that institutionalizes the policy of affirmative (social quotas) action at UVA and UERJ has expanded or access to university students from public schools, including courses of historically elitist profile.Con el objetivo de analizar la articulación entre la reserva de plazas vacantes de dos instituciones públicas de educación superior y la docencia universitaria para prácticas pedagógicas que intentan combatir la desigualdad racial, social y cultural, este artículo presenta como premisa la equidad de oportunidades. Así pues, busca articular las ideas teóricas de Mantoan (2013), Rodrigues y Garzón (2012), Pimenta y Anastasiou (2005), Booth y Ainscow (2002), y Sawaia (2014) en la constitución de los conocimientos de los docentes para la enseñanza con inclusión; al igual que la necesidad emergente de superar los paradigmas de la reproducción, tan de las prácticas de la docencia como de los procesos de formación de estos docentes. Las preguntas de la investigación giran alrededor de: ¿Cómo dialogan las diferentes concepciones de la discapacidad en el proceso de formación y enseñanza-aprendizaje de estos profesores en relación con la lucha contra la desigualdad racial, social y cultural? ¿Qué evidencias dice el campo de la docencia universitaria de dos instituciones de educación superior sobre las experiencias de las reservas de plazas vacantes que apuntan a reducir las desigualdades entre los estudiantes beneficiados por las políticas de acción afirmativa? El método utilizado analiza el contenido de las fuentes documentales que regulan las cuotas en la Universidad, siendo sitios de la investigación: Universidad Estatal del Vale do Acara (UVA), Sobral, Ceará y Universidad Estatal de Río de Janeiro (UERJ), Río de Janeiro, RJ. Como resultado muestra que la institucionalización de la política de acción afirmativa (cuotas sociales)  en UVA y UERJ ha aumentado el acceso de los estudiantes de pregrado de las escuelas públicas, incluso en cursos con un perfil históricamente elitizado.Objetivando analisar a articulação entre a reserva de vagas de duas instituições públicas de ensino superior e a docência universitária para práticas pedagógicas que visem combater a desigualdade racial, social e cultural, esse artigo tem como premissa a equidade de oportunidades. Para tanto, busca articular as ideias teóricas de Mantoan (2013), Rodrigues e Garzón (2012), Pimenta e Anastasiou (2005), Booth e Ainscow (2002), Sawaia (2014) na constituição dos saberes dos professores para o ensino com inclusão; bem como na emergente necessidade de superação de paradigmas de reprodução, tanto das práticas docentes quanto dos processos de formação desses professores. As questões de pesquisa giram em torno de: Como as diferentes concepções de inclusão dialogam no processo de formação de professores e de ensino-aprendizagem destes professores em relação ao combate da desigualdade racial, social e cultural? Que evidências o campo da docência universitária de duas instituições de ensino superior diz sobre as experiências das reservas de vagas, que caminham para redução das desigualdades entre estudantes beneficiados por políticas de ações afirmativas? Tem como método a análise de conteúdo de fontes documentais que normatizam as cotas na Universidade, sendo lócus da pesquisa: Universidade Estadual Vale do Acaraú (UVA), Sobral, CE e Universidade do Estado do Rio de Janeiro (UERJ), Rio de Janeiro, RJ. Evidencia que a institucionalização da política de ação afirmativa (cotas sociais) na UVA e UERJ tem ampliado o acesso de graduandos oriundos de escolas públicas, inclusive, em cursos de perfil historicamente elitizado

Level of Physical Activity and functional capacity of patients with pre-dialytic chronic kidney disease and in hemodialysis

O objetivo deste estudo foi comparar a capacidade funcional (CF) e o nível de atividade física (NAF) de indivíduos com doença renal crônica (DRC) em tratamento hemodialítico (HD) em longo prazo (G1); em curto prazo (G2); em tratamento conservador (G3) e indivíduos sem DRC (G4). Trata-se de um estudo transversal, descritivo, composto por uma amostra de conveniência. Foram avaliados 44 indivíduos, sendo 13 do G1 (50,6±11,5 anos), 9 do G2 (50,8±19,01), 9 do G3 (42,8±15,6) e 13 do G4 (49,2±11,2). A CF foi avaliada pelo teste de caminhada de seis minutos (TC6´), e o nível de atividade física pelo questionário IPAQ. Para a análise estatística na comparação entre grupos utilizouse o Anova One-way com post hoc de Bonferroni. Para variáveis categóricas foi utilizado o teste de qui-quadrado. Foi encontrada diferença significativa na comparação da distância percorrida no TC6’ entre G1 e G4 (409,4±108,1 x 571,9±31,5m; p=0,001) e entre G2 e G4 (422,6±133,2 x 571,9±31,5m; p=0,006). O mesmo ocorreu para valores da distância percorrida no TC6’ em percentual do previsto. Quanto ao NAF, não foram encontradas diferenças significativas entre os grupos, e a maioria dos indivíduos apresentou baixo NAF. Dessa forma, conclui-se que indivíduos com DRC que realizam HD apresentam redução da CF quando comparados a pessoas sem DRC.El objetivo de este estudio fue comparar la capacidad funcional (CF) y el nivel de actividad física (NAF) de los individuos con enfermedad renal crónica (ERC) en tratamiento de hemodiálisis (HD) a largo plazo (G1); a corto plazo (G2); en tratamiento conservador (G3) e individuos sin ERC (G4). Se trata de un estudio transversal, descriptivo, compuesto por una muestra de conveniencia. Se evaluaron 44 individuos, siendo 13 del G1 (50,6 ± 11,5 años), 9 del G2 (50,8 ± 19,01), 9 del G3 (42,8 ± 15,6), y 13 del G4 (49,2 ± 11,2). La CF fue evaluada por la prueba de caminata de seis minutos (PC6’), y el nivel de actividad física por el cuestionario IPAQ. Para el análisis estadístico en la comparación entre grupos, se utilizó el Anova One-way con prueba post-hoc de Bonferroni. Para las variables categóricas se utilizó la prueba de chi-cuadrado. Se encontró una diferencia significativa en la comparación de la distancia recorrida en el TC6’ entre G1 y G4 (409,4 ± 108,1 × 571,9 ± 31,5m; p = 0,001), y entre G2 y G4 (422,6 ± 133,2 × 571,9 ± 31,5m; p = 0,006). Lo mismo ocurrió para valores de la distancia recorrida en el TC6’ en porcentaje de lo previsto. En cuanto al NAF, no se encontraron diferencias significativas entre los grupos, y la mayoría de los individuos presentó bajo NAF. Por lo tanto, se concluye que individuos con ERC que realizan HD presentan reducción de la CF en comparación con personas sin ERC.The aim of this study was to compare the functional capacity (FC) and level of physical activity (LPA) of individuals with chronic kidney disease (CKD) in long-term hemodialysis (HD) treatment (G1); in shortterm HD treatment (G2); in conservative treatment (G3), and individuals without CKD (G4). This was a descriptive cross-sectional study with a convenience sample. A total of 44 individuals were evaluated, 13 of G1 (50.6 ± 11.5 years), 9 of G2 (50.8 ± 19.01), 9 of G3 (42.8 ± 15.6), and 13 of G4 (49 , 2 ± 11.2). FC was assessed by the six-minute walking test (6MW) and the L PA by the IPAQ questionnaire. For statistical analysis in the comparison between groups, we used ANOVA One-way with Bonferroni post hoc. For categorical variables, the Chi-square test was used. A significant difference was found in the comparison of the 6MW walking distance between G1 and G4 (409.4 ± 108.1 x 571, 9 ± 31.5m; p = 0.001) and between G2 and G4 (422.6 ± 133.2 x 571.9 ± 31.5 m, p = 0.006). Similar results were observed for 6MW distance in prediction percentage. Regarding LPA, no significant differences were found between the groups and most individuals presented low levels. Therefore, it was concluded that individuals with CKD in HD treatment present reduction of CF when compared to people without CKD

Mixing propolis from different apiaries and harvesting years: towards propolis standardization?

Global demand for safe, effective and natural products has been increasing in parallel with consumers’ concerns about personal and environmental health. Propolis, a traditional and potentially medicinal product with several health benefits, is a beehive product with a worldwide reputation. However, despite the bioactivities reported, the low productivity and high chemical heterogeneity have been extensively hampering broader industrial uses. To assist in overcoming some of these problems, we prepared and characterized mixtures of ethanol extracts of a heterogeneous propolis sample (Pereiro) collected over a five-year period (2011–2015) and, additionally, we mixed two different propolis samples from distinct regions of Portugal (Pereiro and Gerês), also harvested at different times. An investigation of the antimicrobial and antioxidant properties, as well as characterization of the chemical composition of the eleven propolis blends were performed in this work. The antioxidant and antimicrobial activities of such blends of propolis samples, either from different localities and/or different years, were maintained, or even enhanced, when a comparison of the individual extracts was conducted. The differences in the chemical composition of the original propolis samples were also diluted in the mixtures. The results reemphasize the great potential of propolis and suggest that mixing different samples, regardless of provenance or harvesting date, can contribute to propolis standardization while simultaneously increasing its availability and adding value to this beehive byproduct.This research was funded by European Investment Funds by FEDER/COMPETE/POCI - Operational Competitiveness and Internationalization Programme, under Project POCI-01-0145-FEDER-006958 and National Funds by FCT—Portuguese Foundation for Science and Technology, under the project UID/AGR/04033/2019. Ana Freitas acknowledges the financial support provided by national funds through FCT—Portuguese Foundation for Science and Technology (PD/BD/128276/2017), under the Doctoral Programme “Agricultural Production Chains—from fork to farm” (PD/00122/2012) and from the European Social Funds and the Regional Operational Programme Norte 2020. This study was also supported by CITAB research unit (UIDB/04033/2020) and by CBMA research unit (UIDB/04050/2020) funded by national funds through the FCT I.Pg

Differences in chemical composition and antioxidant activity of three propolis samples collected in the same apiary

Financial support provided by FCT (PD/BD/128276/2017), under the Doctoral Programme Agrichains - PD/00122/2012

Evaluation and characterization of antioxidant and antigenotoxic properties of portuguese propolis

Propolis is a substance produced by bees (Apis mellifera L.), after harvesting exsudates of plant buds and barks, and subsequent mixing with the salivary enzyme β-glucosidase. Bees use propolis in their combs as protection, to repair damage, to build aseptic locals for the eggs of the queen, and also as a thermal insulator. The composition of propolis varies geographically, with the available flora, the time of collection and the race of the bees. Different groups of compounds can be found in propolis such as polyphenols, terpenoids, steroids and amino acids. Some of these compounds have been associated with diverse biological activities: antimicrobial, antioxidant, antigenotoxic, genotoxic and antimutagenic. Portuguese propolis has recently attracted the interest of researchers because of the opportunity for its economic valorization and the need to scientifically support the biological properties commonly assigned to samples of different origins. Thus, our objective relates to the analysis and study of Portuguese propolis, particularly in what concerns its chemical characterization and the evaluation of biological activities. A propolis ethanol extract (PEE) was made from a sample provided from an apiary (Côa) in Beira Alta and tested in different assays, using Saccharomyces cerevisiae as biological model. We have performed viability assays in pre-, co- and post-incubation conditions using PEE and 5mM hydrogen peroxide (H2O2) in order to investigate the effect of PEE as antioxidant and/or protective agent against oxidative stress. The comet assay was used in pre- and co-incubation to complement the previous method and to investigate the antigenotoxicity/genotoxicity of PEE under the same conditions. Chemical analysis of the extract was made to determine total polyphenol and flavonoid contents as well as antioxidant capacity of propolis. Results show that Portuguese propolis has antioxidant capacity when assessed by DPPH and ABTS assays. Accordingly, the viability of yeast cells shocked with the oxidant agent H2O2 was improved in the presence of propolis, either in pre-incubation or in co-incubation conditions. However, when cells were analyzed by the comet assay, the antigenotoxicity of PEE was more evident in pre-incubation than in co-incubation assays. In addition, our results suggest that propolis has also a genotoxic effect in yeast cells, since cells treated only with PEE displayed more DNA damage that the untreated ones

Juventude em foco:: de “novo” a participação social na roupagem do capital social

Este artigo incorpora estudos e pesquisas que estão sendo realizados em nível de doutorado e discutidos no âmbito de um grupo de pesquisa que abrange os campos da assistência social e da educação. Seu recorte traz a discussão das atuais políticas educacionais voltadas para a juventude brasileira, predominantemente articuladas com as políticas sociais. Os autores apresentam essa articulação associada ao projeto societário “novo-desenvolvimentista” do atual governo Lula, sem, contudo, considerar uma especificidade, mas um movimento amplo e externo voltado para atribuir uma face mais humana ao capitalismo e operar condições favoráveis à acumulação do capital na virada do milênio ”“ estabilidade econômica e política. Aborda a discussão sobre a compreensão da “nova questão social”, os encaminhamentos de política pública dos governos de Fernando Henrique Cardoso e Luiz Inácio Lula da Silva e de políticas educacionais voltadas para jovens considerados em situação de “vulnerabilidade social” ou “situação de risco social”

Propolis efficacy: the quest for eco-friendly solvents

Propolis, a natural product made by bees with resins and balsams, is known for its complex chemical composition and remarkable bioactivities. In this study, propolis extraction was studied seeking extracts with strong bioactivities using less orthodox solvents, with some derived from apiary products. For that, a propolis sample collected from Gerês apiary in 2018 (G18) was extracted by maceration with six different solvents: absolute ethanol, ethanol/water (7:3), honey brandy, mead, propylene glycol and water. The solvent influence on the chemical composition and antioxidant and antimicrobial activities of the extracts was investigated. Antioxidant potential was assessed by the DPPH free-radical-scavenging assay and the antimicrobial activity by the agar dilution method. Chemical composition of the extracts was determined in vitro by three colorimetric assays: total ortho-diphenols, phenolics and flavonoids contents and the LC-MS technique. To our knowledge, this is the first time that solvents such as honey brandy and mead have been studied. Honey brandy showed considerable potential to extract propolis active compounds able to inhibit the growth of bacteria such as the methicillin-sensitive Staphylococcus aureus and Propionibacterium acnes (MIC values of 100 and 200 µg/mL, respectively) and the fungi Candida albicans and Saccharomyces cerevisiae (MIC=500 µg/mL, for both). Mead extracts displayed high antioxidant capacity (EC50=1.63 ± 0.27 µg/mL) and great activity against resistant bacteria such as the methicillin-resistant Staphylococcus aureus and Escherichia coli (MIC=750 µg/mL, for both). The production of such solvents made from beehive products further promotes a diversification of apiary products and the exploration of new applications using eco-friendly solutions.Ana Freitas acknowledges the financial support provided by national funds through FCT—Portuguese Foundation for Science and Technology (PD/BD/128276/2017), under the Doctoral Programme “Agricultural Production Chains—from fork to farm” (PD/00122/2012), and from the European Social Funds and the Regional Operational Programme Norte 2020. This study was also supported by CITAB research unit (UIDB/04033/2020), CBMA research unit (Contrato-Programa UIDB/04050/2020), Centre of Chemistry (UID/QUI/0686/2016), BioTecNorte (operation NORTE-01-0145-FEDER-000004), supported by the Northern Portugal Regional Operational Programme (NORTE 2020), LAQV (projects UIDB/50006/2020, UIDP/50006/2020, and UID/BIA/04004/2020) funded by national funds through the FCT I.P.info:eu-repo/semantics/publishedVersio