3 documents found, page 1 of 1
Drivers of survival in a small mammal of conservation concern: an assessment us...
Proença-Ferreira, António; Ferreira, Clara; Leitão, Isabel; Sabino-Marques, Helena; Barbosa, Soraia; Encarnação, Cláudia; Alpizar-Jara, RussellAlthough important to guide conservation management, detailed demographic studies on rare or elusive species inhabiting fragmented, human-dominated landscapes are often hampered by the species' low densities, and the logistic and ethical constraints in obtaining reliable information covering large areas. Genetic non-invasive sampling (gNIS) provides cost-effective access to demographic information, though its a...
Plant aqueous extracts: antioxidant capacity via haemolysis and bacteriophage P...
Gião, Maria S.; Leitão, Isabel; Pereira, Ana; Borges, André B.; Guedes, Catarina J.; Fernandes, João C.; Belo, Luís; Santos-Silva, Alice; Hogg, Tim A.The bacteriophage P22/Salmonella Typhimurium system, as well as human erythrocytes have been used to assay for protection, against forced oxidation caused by hydrogen peroxide, brought about by several aqueous extracts of selected adventitious plants grown in Portugal. This study proved, for the first time, that the aforementioned bacteriophage-based system is a suitable method to assess the antioxidant activit...
Classes de rendimento no mercado obrigacionista português
Adelino, José Neves; Leitão, IsabelThis paper investigates whether distinct return classes can be found in the Portuguese indexed bond market in an attempt to identify risk-related differences in required returns. Using weekly prices for the most frequently traded bond issues over the period 1986/1988, this paper applies a clustering procedure that simultaneously generates estimates of future bond index rates and class returns. Evidence is prese...