Browsing by Author "Moura, Ana"
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- A GRASP approach to the container-loading problemPublication . Moura, Ana; Oliveira, J.F.The GRMODGRASP, a new algorithm for the container-loading problem (CLP) based on the greedy randomized adaptive search procedure (GRASP) approach, is discussed. Based on a wall-building, constructive heuristic, it can achieve high levels of cargo stability without compromising the container's volume use. The algorithm builds a solution, and then it improves the solution with a local-search algorithm. If it finds a better solution, this new solution replaces the old and a new neighborhood is built around it. The algorithm uses a first better strategy when more than one better solution exists
- How gamma-rays and electron-beam irradiation would affect the antimicrobial activity of differently processed wild mushroom extracts?Publication . Alves, Maria José; Fernandes, Ângela; Barreira, João C.M.; Lourenço, Inês; Fernandes, Dina; Moura, Ana; Ribeiro, Ana Raquel; Salgado, Julie; Antonio, Amilcar L.; Ferreira, Isabel C.F.R.The effects of irradiation (gamma-rays and electron-beams), up to 10 kGy, in the antimicrobial activity of mushroom species (Boletus edulis, Hydnum repandum, Macrolepiota procera and Russula delica) differently processed (fresh, dried, freeze) were evaluated. Methods and Results: Clinical isolates with different resistance profiles from hospitalized patients in Local Health Unit of Mirandela, Northeast of Portugal, were used as target micro-organisms. The mushrooms antimicrobial activity did not suffer significant changes that might compromise applying irradiation as a possible mushroom conservation technology. Conclusions: Two kGy dose (independently of using gamma-rays or electron-beams) seemed to be the most suitable choice to irradiate mushrooms. Significance and Impact of the Study: This study provides important results in antimicrobial activity of extracts prepared from irradiated mushroom species.