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PRODUÇÃO E ARMAZENAMENTO DE HIDROGÉNIO MOLECULAR A PARTIR DA HIDRÓLISE CATALISA...

Com esta sessão laboratorial pretende-se realizar ensaios, à temperatura controlada de 45ºC, de produção local (com simultâneo armazenamento) de hidrogénio molecular (H2) a partir da reacção de hidrólise catalisada de borohidreto de sódio (NaBH4). Pretende-se determinar a taxa de produção de hidrogénio, rendimento da reacção e tempos de indução. Os resultados obtidos deverão ser comparados, sempre que possível,...

Statistical tool combined with image analysis to characterize hydrodynamics and...

Image analysis technique has been proved to be very effective in the quantification of particles size and morphology distributions in different work areas. In the present work this technique was combined with the discriminant factorial analysis (DFA) in order to allow the automatic identification of single bubbles (isolated bubbles without influence of surrounded bubbles) in multiphase systems. With the previou...

Patologia ovárica num centro oncológico pediátrico

Introdução: A patologia ovárica é rara em idade pediátrica. Deve, no entanto, ser um diagnóstico a considerar em criança ou adolescente com dor abdominal, massa pélvica ou irregularidade menstrual. Os sintomas não são geralmente esclarecedores na distinção entre massas benignas e malignas e por isso a cirurgia tem um papel importante, não só no diagnóstico, mas também no estadiamento e tratamento. Objectivo: Es...

Evaluation and characterization of antioxidant and antigenotoxic properties of ...

Propolis is a substance produced by bees (Apis mellifera L.) after harvest of buds and bark of plants and by 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 collecti...

Evaluation and characterization of antioxidant and antigenotoxic properties of ...

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...

Herbicidal properties of portuguese propolis samples

Propolis is a natural product made by honeybees (Apis mellifera L.) with important physical and biological protective functions, being used to maintain hive integrity, as well as adequate thermal and sanitary conditions. It is a complex mixture made essentially from collected plant exudates, being composed of waxes, resins, balsams, pollen, essential oils, and other organic and mineral compounds. It has a high ...

Bioactivities of portuguese propolis

Natural products have been traditionally used in the treatment of several diseases because they are the source of many biologically active compounds, which can bear several therapeutic actions and/or constitute models for the synthesis of new drugs. Propolis or bee glue, one of the few natural remedies that has maintained its popularity over a long period of time, has been the focus of intense research during t...

Using an on-line image analysis technique to characterize sucrose crystal morph...

The morphological forms and habits of crystals and agglomeration are important properties on crystallization processes. Online techniques for realtime measurement of these properties are mandatory for a better comprehension of crystal growth phenomenon. The present paper presents and describes a new online method to determine the complexity level of a crystal or a population of crystals during a crystallization...

Tratamento hipofracionado de radioterapia em felinos portadores de carcinoma ep...

Avaliou-se a eficácia do protocolo radioterápico hipofracionado no tratamento de felinos portadores de carcinoma epidermóide facial. Um protocolo hipofracionado de radioterapia foi aplicado em cinco gatos portadores de um ou mais carcinomas epidermóides faciais, em um total de 10 lesões neoplásicas, confirmadas por meio de análise histológica. Duas lesões foram classificadas como T1, quatro como T2, duas como T...

NovaFlow : novel applications of a state-of-the-art oscillatory flow platform :...