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Percorrer por autor "Amado, A. M."

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  • The drying process of Sarcocornia perennis: impact on nutritional and physico-chemical properties
    Publication . Barroca, M. J.; Guiné, Raquel P. F.; Amado, A. M.; Ressurreição, S.; da Silva, A. Moreira; Marques, M. P. M.; de Carvalho, L. A. E. Batista
    The Sarcocornia genus is an extreme salt-toler- ant plant that can be cultivated in saline habitats almost worldwide. To preserve Sarcocornia perennis, convective drying experiments were conducted and their effects on the physico-chemical properties and phenolic content of the plant were studied using conventional and vibrational spectroscopy techniques. The drying process of Sarcocor- nia perennis at temperatures of 40 C, 50 C, 60 C and 70 C revealed three periods of convective drying process with drying times ranging between 4.5 and 24.9 h, respectively to higher and lower temperatures. The heating- up period can be neglected as compared with the drying process, and the duration of constant rate period, as a percentage of the total drying time, ranged between 34 and 20% respectively at 40 C and 70 C. The Modified Page model was proposed to describe the drying process at the different temperatures. From a nutritional point of view, this halophyte plant may be considered as a good source of fibres, phenolic compounds and natural minerals, such as sodium, potassium, calcium and magnesium. The convec- tive drying, in the temperature range currently used, was found to preserve the colour, nutritional characteristics and phytochemical value of Sarcocornia perennis. These results were confirmed by FTIR-ATR and highlight the potential use of the dried plant in novel food products.
    2020Artigo científico Acesso aberto Ver mais