A new strategy for the synthesis of 3-cinnamoyl-2-styrylchromones and their transformation into new xanthenodiones derivatives

23rd ISHC Congress will be held in Glasgow, Scotland from July 31 August 4, 2011.

Synthesis of new 1,8-dihydroxy-9h-xanthen-9-ones

XXVth European Colloquium on Heterocyclic Chemistry, Reading, UK, 13 – 17 Agosto de 2012.

Measurement of Photo Capacitance in Amorphous Silicon Photodiodes

This paper discusses the photodiode capacitance dependence on imposed light and applied voltage using different devices. The first device is a double amorphous silicon pin-pin photodiode; the second one a crystalline pin diode and the last one a single pin amorphous silicon diode. Double amorphous silicon diodes can be used as (de)multiplexer devices for optical communications. For short range applications, using plastic optical fibres, the WDM (wavelength-division multiplexing) technique can be used in the visible light range to encode multiple signals. Experimental results consist on measurements of the photodiode capacitance under different conditions of imposed light and applied voltage. The relation between the capacitive effects of the double diode and the quality of the semiconductor internal junction will be analysed. The dynamics of charge accumulations will be measured when the photodiode is illuminated by a pulsed monochromatic light.

New xanthenodione: synthesis and antioxidant activity evaluation

6th Spanish-Portuguese-Japanese Organic Chemistry Symposium, Lisboa, de 18 a 20 de Julho de 2012 (Poster Communication).

Efectividade de um programa de exercícios terapêuticos em meio aquático na ligamentoplastia do LCA

A reabilitação do joelho utilizando exercícios terapêuticos em meio aquático tem sido utilizada com o intuito de iniciar, de forma imediata os movimentos articulares, pois reduz a dor e permite a carga de peso mais precoce. Apesar destas vantagens serem reconhecidas, poucos estudos têm sido realizados no sentido de determinar a efectividade dos exercícios terapêuticos em meio aquático na reabilitação pós-cirúrgica do ligamento cruzado anterior (LCA) Objectivo: Descrever os efeitos de um programa de exercícios terapêuticos em meio aquático num caso clínico de ligamentoplastia do cruzado anterior. Metodologia: Um jogador de futebol de 27 anos de idade, sujeito a uma ligamentoplastia do LCA, completou um programa de exercícios terapêuticos em meio aquático que constou de um total de 24 sessões (4 por semana, e 60 minutos por sessão). O atleta foi avaliado em três momentos distintos (T0, no início da intervenção, T1, três semanas após o início da intervenção e T2, seis semanas após o início da intervenção. Como parâmetros de avaliação foram utilizadas as amplitudes articulares (goniometria), o teste muscular manual, o volume muscular (perimetria), o equilíbrio estável (Y Balance Test (YBT)) e a funcionalidade (Knee Injury and Osteoarthritis Outcome Score (KOOS)). Resultados: Após as 24 sessões verificou-se uma melhoria nos diversos parâmetros avaliados (flexão do joelho: 75º vs 134º; extensão do joelho: -7º vs 0º; força dos flexores e extensores do joelho: 3 vs 4+; perimetria da coxa: 46,2 cm vs 51,5 cm; YBT: equilíbrio anterior (resultados correspondentes aos momentos T1 e T2): 53 cm vs 72 cm; posterolateral: 46 cm vs 61 cm; posteromedial: 39 cm vs 57 cm; KOOS: dor/sintomas: 17 vs 92, outros sintomas: 25 vs 75, actividades da vida diária: 12 vs 90, actividades desportivas e de lazer: 0 vs 55, qualidade de vida relacionada com o joelho: 0 vs 50. Conclusão: O programa de exercícios terapêuticos em meio aquático utilizado neste estudo parece ter efeitos benéficos num caso clínico de ligamentoplastia do cruzado anterior.

Building the «true evolutionism»: Darwin's impact on Henri Bergson's thought

The paper focuses on the importance of Darwin’s work for the shaping of Henri Bergson’s philosophy, bearing on mind that the two authors first intercepted symbolically in 1859, when On the Origin of Species was published and Bergson was born. Bergson studied the biological sciences of his time, whose results were integrated in a metaphysical thought. He belonged to spiritualistic positivism, a philosophy that goes from the positive data of sciences and finds the ultimate explanation of reality in a spiritual principle. He was interested in the positive evolution of the natural world and in the works of naturalists such as Lamarck, De Vries or Eimer. Darwin was among these authors, being responsible for a vision of evolution that went from the scientific level to other domains. Bergson defends the “insufficiency of pure Darwinism” by pointing out the necessity to compensate scientific evolution with an internal metaphysical reading of the real, which he considered to be “true evolutionism”. This criticism is the most visible aspect of the relations between both works. However, an attentive look verifies that Darwin’s influence overcomes the divergence of positions concerning the extent of “evolution”. The French philosopher knew not only the 1859’s bestseller, but also studies by Darwin about ethology, entomology and botany, which contributed to the fact that the naturalist’s impact gained fundamental importance in Bergson’s philosophical perspective.

Notice on a methodology for characterizing emissions of ultrafine particles/nanoparticles in microenvironments

Bearing in mind the potential adverse health effects of ultrafine particles, it is of paramount importance to perform effective monitoring of nanosized particles in several microenvironments, which may include ambient air, indoor air, and also occupational environments. In fact, effective and accurate monitoring is the first step to obtaining a set of data that could be used further on to perform subsequent evaluations such as risk assessment and epidemiologic studies, thus proposing good working practices such as containment measures in order to reduce occupational exposure. This paper presents a useful methodology for monitoring ultrafine particles/nanoparticles in several microenvironments, using online analyzers and also sampling systems that allow further characterization on collected nanoparticles. This methodology was validated in three case studies presented in the paper, which assess monitoring of nanosized particles in the outdoor atmosphere, during cooking operations, and in a welding workshop.

Uma cidade portuária: a Horta entre 1880 e 1926. Sociedade e cultura com a política em fundo

Tese de Doutoramento, História (História Contemporânea), 29 de Novembro de 2013, Universidade dos Açores.

Intervenção pedagógica do futuro educador/professor e avaliação interativa nas práticas de estagiários e no discurso de docentes

Mestrado (PES II), Educação Pré-Escolar e Ensino do 1º Ciclo do Ensino Básico, 3 de Julho de 2014, Universidade dos Açores.

Direct Color Sensor, Optical Amplifier and Demux Device Integrated on a Single Monolithic SiC Photodetector

A pi'n/pin a-SiC:H voltage and optical bias controlled device is presented and its behavior as image and color sensor, optical amplifier and demux device is discussed. The design and the light source properties are correlated with the sensor output characteristics. Different readout techniques are used. When a low power monochromatic scanner readout the generated carriers the transducer recognizes a color pattern projected on it acting as a direct color and image sensor. Scan speeds up to 10(4) lines per second are achieved without degradation in the resolution. If the photocurrent generated by different monochromatic pulsed channels is readout directly, the information is demultiplexed. Results show that it is possible to decode the information from three simultaneous color channels without bit errors at bit rates per channel higher than 4000 bps. Finally, when triggered by light of appropriated wavelength, it can amplify or suppress the generated photocurrent working as an optical amplifier (C) 2009 Published by Elsevier Ltd.

Xanthenedione derivatives, new promising antioxidant and acetylcholinesterase inhibitor agents

Natural and synthetic xanthone derivatives are well-known for their ability to act as antioxidants and/or enzyme inhibitors. This paper aims to present a successful synthetic methodology towards xanthenedione derivatives and the study of their aromatization to xanthones. Additionally their ability to reduce Fe(III), to scavenge DPPH radicals and to inhibit AChE was evaluated. The results demonstrated that xanthenedione derivative 5e, bearing a catechol unit, showed higher reduction capacity than BHT and similar to quercetin, strong DPPH scavenging activity (EC50 = 3.79 ± 0.06 μM) and it was also showed to be a potent AChEI (IC50 = 31.0 ± 0.09 μM) when compared to galantamine (IC50 = 211.8 ± 9.5 μM).

Lighting conditions at an operating room in a Portuguese maternity

Lighting is one of the most important factors in human interaction with the environment. Poor lighting may increase the risk of accidents and could also cause a variety of symptoms including: rapid fatigue, headaches, eyestrain, tired eyes, dry eyes, ocular surface symptoms (watery and irritated eyes), decreased concentration and stress. Specific disorders: degeneration of the sharpness of vision (blurred and double vision) and slowness in changing focus. Apart from the advantages in the health and welfare for the workers, good lighting also leads to better job performance (faster), less errors, better safety, fewer accidents and less absenteeism. The overall effect is: better productivity. Good lighting includes quantity and quality requirements, and should necessarily be appropriate to the activity/task being carried out, bearing in mind the comfort and visual efficiency of the worker.

Contribuição para o desenvolvimento e a implementação do sistema de planeamento de emergência na Região Autónoma dos Açores

Dissertação de Mestrado em Vulcanologia e Riscos Geológicos

Necessidades dos idosos do concelho da Praia da Vitória em cuidados continuados domiciliários

Dissertação de Mestrado em Gerontologia Social

Tipologia, instalação, funcionamento e manutenção dos diversos tipos de aparelhos de apoio em obras de arte

Trabalho Final para a obtenção do grau de Mestre em Engenharia Civil