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Morphological alterations in salivary glands of mice (Mus musculus) submitted t...
Lamy,E.; Baptista,E.S.; Coelho,A.V.; Silva,F. Capela eIn order to study the effects of tannins at histomorphological level, mice were either fed with three structurally different types of tannins (tannic acid, chestnut, and quebracho) or treated with isoproterenol, during 10 days. Acini of parotid and submandibular glands increased significantly, being the increase higher for parotid compared to submandibular glands, and higher in the quebracho compared with the o...
Utilização da proteómica para compreender o comportamento de ingestão
Lamy, E.; Capela e Silva, Fernando; Sales Baptista, E.; Graça, G.; da Costa, G.; Coelho, A.V.O comportamento ingestivo é regulado, entre outros, por factores afectivos, os quais determinam diferentes preferências. A escolha da dieta depende de experiências anteriores, bem como do nível de percepção gustativa, estando a saliva envolvida neste último. As proteínas salivares desempenham papéis muito diversos que incluem a lubrificação, digestão, protecção contra microorganismos e factores antinutritivos, ...
Comparison of Electrophoretic Protein Profiles from Sheep and Goat Parotid Saliva
Lamy, E.; da Costa, G.; Capela e Silva, Fernando; Potes, J.C.; Coelho, A.V.; Sales Baptista, E.Saliva provides a medium for short-term adaptation to changes in diet composition, namely, the presence of plant secondary metabolites. Salivary proteins have biological functions that have particular influence on oral homeostasis, taste, and digestive function. Some salivary proteins, such as proline-rich proteins, are present in browsers but absent in grazers. Despite the significance of salivary proteins, th...
Salivary Amylase Induction by Tannin-Enriched Diets as a Possible Countermeasur...
da Costa, G.; Lamy, E.; Capela e Silva, Fernando; Andersen, J.; Sales Baptista, E.; Coelho, A.V.Tannins are characterized by protein-binding affinity. They have astringent/bitter properties that act as deterrents, affecting diet selection. Two groups of salivary proteins, proline-rich proteins and histatins, are effective precipitators of tannin, decreasing levels of available tannins. The possibility of other salivary proteins having a co-adjuvant role on host defense mechanisms against tannins is unknow...
O problema da extracção do alumínio a partir dos sienitos nefelínicos
Coelho, A. V. PintoSome countries producers of the aluminium, attempt to use other ores which, in the future, will gradually substitute the bauxite as a raw material. Portugal possesses an nephelinic syenite massif which may be utilized for this purpose because the nepheline offers some advantages above other poor ores which are being essayed now. By laboratorial processes, the author puts forward those advantages and calls the a...
Exemplo de vulcanismo tardio em Portugal- rocha ígnea post-Miocénico inferior (...
Coelho, A. V. Pinto; Bravo, M. S.A small outcrop of an igneous rock (basanite) was observed in 1971 at Figueira-Mexilhoeira Grande-Algarve, enclosed by Miocene limestone and showing clear evidente of low grade thermal effects along the contact with the igneous mass. This is in agreement with F. L. Pereira Sousa who was the first geologist to admit (1917) the existence of Miocene igneous rocks in Algarve although subsequently they were not poss...
O pórfiro dacítico de Valverde (Alcácer do Sal) idade Rb-Sr e suas implicações
Pinto Coelho, A. V.; Abranches, C.; Canilho, M. H.The unexpected discovery of a small outcrop of igneous rock isolated within an extensive outcrop of Neogene and Quaternary sediments called for the attention of CEPUNL's researchers. The rock is a dacite whose Rb-Sr age (C. A. and M. H. C.) is 291 M. y. upper Carboniferous. Hence the dacite may be related to volcanism in the Santa Suzana tectonic basin.
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