Browsing by Issue Date, starting with "2017-12"
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- Assessment of the impact synthetic Fe(III)-chelates amendment in soil microbial community dynamicsPublication . Machado, Ana; Mesquita, Letícia S.; Rangel, Maria; Mesquita, Raquel B. R.; Rangel, António O. S. S.; Bordalo, Adriano A.
- Assessment of the impact synthetic Fe(III)-chelates amendment in soil microbial community dynamicsPublication . Machado, Ana; Mesquita, Raquel B. R.; Mesquita, Letícia S.; Rangel, Maria; Rangel, António O. S. S.; Bordalo, Adriano A.Background Iron has a crucial role in plant nutrition, being an essential element for plant growth. However, one-third of the Earth soil is iron deficient, resulting in iron deficiency chlorosis (IDC) growth of several crops worldwide, including staple foods. The use of synthetic Fe(III)-chelates is one of the most effective measures to correct IDC in plants, but their environmental impact must be mastered. Therefore, the search for more effective Fe-chelates remains an important issue. Previously [1], a 3,4-HPO Fe-chelate was proposed as a novel-fertilizing agent. Since the increase of nutrients availability in soil is thought to have an impact on the microbial composition, this question needs to be addressed. Therefore, the aim of the study was to investigate the effect of iron complexes of the 3,4-HPO class of ligands on soil bacterial dynamics to better understand their pathways. Method Laboratory scale soil columns (LSSC) were set up, with different soils origin and characteristics (Agricultural, Forestry and Urban), and exposed to two iron-chelates using rain simulations. The structure and abundance of the bacterial community was evaluated by automated ribosomal intergenic spacer analysis (ARISA) and qPCR (rpoB) approaches. Results & Conclusions Cluster analysis of ARISA profiles revealed that the soil characteristics were the major driving selection for the microbial community composition, with the samples from the same soil type clustering together, disregarding the amendment performed. Also, it emerged that the microbial community of forestry and agricultural soils were more similar (46%) than the one present in urban soil, as expected due to the plant influence. Considering each soil type individually, it was possible to observe a clear response to Fe(III) amendment on the microbial assemblage. Additionally, it seems that one of the compounds, the Fe-chelate derived from the ligand Deferiprone, induced greater and/or faster changes, and that the forestry soil was more prone to the microbial shift. These changes can underline a selection for bacteria that can use Fe(III) in its metabolism, or more tolerant to its presence, that needs to be better understood.
- Book of abstracts: Congress of Microbiology and BiotechnologyPublication . Manaia, Célia; Pintado, Manuela
- Igualdade democrática e despesa pública justaPublication . Martins, Maria d'OliveiraO presente texto estabelece uma associação entre a despesa pública e uma certa ideia justiça social e de transformação assumida pela Constituição. A partir daqui esclarece o conceito de despesa pública justa, extraindo dele o efeito transformador que pode trazer para a compreensão dos direitos fundamentais, do Orçamento e do controlo jurisdicional da actividade financeira do Estado.
- Production of an antilisterial medium to be used in the industry of Portuguese traditional meat productsPublication . Macieira, Ariana; Barbosa, Joana; Albano, Helena; Morais, Alcina M. M. B.; Teixeira, PaulaIntroduction and Objective: Listeria monocytogenes is a great concern in the industry of Portuguese traditional meat products. Bacteriocins, produced by lactic acid bacteria (LAB) are of great importance in order to face this concern. The reason for that is because some bacteriocins have demonstrated antimicrobial activity against L. monocytogenes and do not alter the organoleptic characteristics of the products (1). Although MRS broth can fill some fastidious growth requirements of many LAB, it cannot be used in the food industry, not only because it is very expensive, when used for large-scale commercial applications, but also, it contains constituents not approved in food production (2). The objective of this study was to seek for a food grade medium that could promote growth of an autochthonous strain of Lactobacillus and production of bacteriocin active against L. monocytogenes. Conclusion: For the two medium, results showed that the maximum antilisterial activity was dependent on the target strains of L. monocytogenes. This food grade medium demonstrated to be a potential alternative to grow bacteriocinogenic Lactobacillus at industrial scale.
- Audiências e cross-media: estudo de padrões de consumo de notícias em PortugalPublication . Silva, Marisa Torres da; Figueiras, Rita; Brites, Maria José; Amaral, Inês; Maropo, Lídia; Santos, Sílvio Correia; Jerónimo, Pedro; Santo, Paula Espírito; Pacheco, LilianaAs práticas digitais que decorrem da ubiquidade dos media e da sua utilização possibilitaram a combinação de múltiplas plataformas no consumo de notícias. Neste artigo, procurámos identificar repertórios mediáticos (padrões de uso dos media noticiosos) em Portugal, de modo a compreender como são construídas as preferências mediáticas das audiências e de que forma o consumo noticioso integra osseus hábitos quotidianos. Neste sentido, desenvolvemos uma análise a padrões de consumo demedianoticiosos a partir de uma abordagem mista de métodos qualitativos e quantitativos baseada na Metodologia Q (Davis & Michelle, 2011), a partir de uma amostra constituída por 36 participantes. A análise dos padrões de consumo de notícias permitiu identificar e analisar sete repertórios mediáticos em função do uso, relevância e utilidade atribuída pelos sujeitos aos media noticiosos. Os resultados revelam perfis híbridos de consumo mediático e uma tendência para consumos de notícias numa lógica móvel e multiplataforma, embora os media tradicionais continuem a desempenhar um papel determinante nos repertórios mediáticos em Portugal.
- Modelos e práticas de avaliação na formação avançada em ciências da educação: face-ensino profissionalPublication . Orvalho, Luísa; Nunes, CatarinaEsta investigação foi realizada no âmbito do projeto de Pós- Doutoramento em Ciências da Educação, na Faculdade de Educação e Psicologia (FEP), da Universidade Católica Portuguesa, intitulado “Colaborar para Inovar no Ensino Profissional”, num conjunto de escolas com ensino profissional, e pretende responder à questão-problema: Que estratégias formativas podem potenciar a mudança de práticas do professor na sala de aula e garantir a qualidade da educação e formação profissional? Seguiu-se a estratégia metodológica - Appreciative Inquiry (AI), assente no Ciclo AI-5 D, constituido por cinco fases de desenvolvimento: Define, Discovery, Dream, Design, Deliver/ Destiny.
- Clima e satisfação laboral numa autarquia da zona norte de PortugalPublication . Barros, Gilberto Óscar da Costa; Lobo, FátimaEsta investigação visa o clima e a satisfação laboral numa autarquia do norte de Portugal. A amostra é constituída por 129 colaboradores, foram aplicados dois instrumentos – Escala de Clima Social no Trabalho e o Questionário de Satisfação Laboral 20/23. Os resultados indicam que o clima organizacional é influenciado pela satisfação laboral, sobretudo a satisfação com a supervisão, que se revela um preditor do clima organizacional em todas as subescalas analisadas, indicam também que os dois constructos são influenciados pelas variáveis organizacionais, destacando-se entre estas, os departamentos de pertença. Os resultados desta investigação para além de enfatizarem a importância da satisfação laboral dos colaboradores em contexto organizacional e sua relação com o clima organizacional, demonstra também a importância do diagnóstico organizacional e os benefícios pessoais e organizacionais que daí advém.
- Being a foster family in Portugal - motivations and experiencesPublication . Diogo, Elisete; Branco, FranciscoFoster care is an almost absent component in the child care system and scientific research conducted in Portugal foster comprises 3.2%(1) of out-of-home care in Portugal. This research aims to contribute to a deeper visibility of the care phenomena, giving specific attention to the foster families themselves. This research adopted a qualitative analytical approach, inspired by Grounded Theory. Foster families' motivation is rooted in altruism, affection for children, and sensitivity to maltreatment. Personal and professional biography or past contact with out-of-home care can also induce predisposition to become a carer. The experience of being a carer(2) is one of traversing through a life of many challenges and rewards. Considering the recognition from the stakeholders, it is a rewarding task. The quality of the service provided and the performance of the care professionals are both key elements to foster care.
- Evaluation of the impact of fertilizers on soil and soil leachates – chemical composition and microbial community assemblagePublication . Costa, Carolina; Rocha, Filipa; Machado, A.; Mesquita, Raquel B. R.; Bordalo, Adriano A.; Rangel, António O. S. S.