72 documents found, page 1 of 8
The Effect of Nutritional Intervention in Nutritional Risk Screening on Hospita...
Oliveira, Raquel; Cabrita, Bruno; Cunha, Ângela; Silva, Sónia; Lima, João P. M.; Martins, Diana; Mendes, FernandoBackground: Lung cancer (LC) patients are prone to suffer from malnutrition. Malnutrition negatively affects patients’ response to therapy, increases the incidence of treatment-related side effects, and decreases survival. Early identification of LC patients who are malnourished or at risk of malnutrition can promote recovery and improve prognosis. Objective: This study aimed to assess the risk and nutritional ...
The effect of nutritional intervention in nutritional risk screening on hospita...
Oliveira, Raquel; Cabrita, Bruno; Cunha, Ângela; Silva, Sónia; PM Lima, João; Martins, Diana; Mendes, FernandoAbstract: Background: Lung cancer (LC) patients are prone to suffer from malnutrition. Malnutrition negatively affects patients’ response to therapy, increases the incidence of treatment-related side effects, and decreases survival. Early identification of LC patients who are malnourished or at risk of malnutrition can promote recovery and improve prognosis. Objective: This study aimed to assess the risk and nu...
Design, manufacturing, and testing of a laser textured piston ring surface rein...
Ferreira, Rita; Cunha, Ângela; Carvalho, Óscar; Trindade, Bruno; Sobral, Luís; Carvalho, Sandra; Silva, FilipeA CuCoBe–diamond composite was used to reinforce a laser textured 410 stainless steel piston ring by hot-pressing. Different hot-pressing parameters were used to optimize the sintering process of the CuCoBe particles (P = 25 and 50 MPa, T = 820 and 980 °C, and t = 15 and 30 min). The results showed an increase in the hardness of the hot-pressed samples (50.5% and 48.5% for P = 25 and 50 MPa, respectively). Thre...
Biosurfactant production in sub-oxic conditions detected in hydrocarbon-degradi...
Domingues, Patrícia M.; Oliveira, Vanessa; Serafim, Luísa Seuanes; Gomes, Newton C. M.; Cunha, ÂngelaHydrocarbon bioremediation in anoxic sediment layers is still challenging not only because it involves metabolic pathways with lower energy yields but also because the production of biosurfactants that contribute to the dispersion of the pollutant is limited by oxygen availability. This work aims at screening populations of culturable hydrocarbonoclastic and biosurfactant (BSF) producing bacteria from deep sub-...
Photodynamic inactivation of the phytopathogenic bacterium Xanthomonas citri su...
Ndemueda, Anastasia; Faustino, Maria do Amparo Ferreira; Cunha, Ângela; Pereira, InêsThe present work intended to evaluate the applicability of photodynamic inactivation (PDI) of Xanthomonas citri subsp. citri with toluidine blue O (TBO), a commercial photosensitizer, as a strategy to control citrus canker. Assays were conducted with cell suspensions and biofilms, constructed either on polypropylene microtubes (in vitro assays) or on the surface of orange leaves (ex vivo assays), in the presenc...
Improved germination efficiency of Salicornia ramosissima seeds inoculated with...
Figueira, Carolina; Ferreira, Maria João; Silva, Helena; Cunha, ÂngelaSaline agriculture and the crop cultivation of halophytes represent an alternative for the reclamation of salinized soils and for the management of irrigation water. Halotolerant plant growth promoting bacteria with biocontrol effect, as an alternative to commercial fungicides, may contribute to improve crop productivity while mitigating saline stress effects. The objective of this work was to isolate autochtho...
Siderophore-producing rhizobacteria as a promising tool for empowering plants t...
Ferreira, Maria J.; Silva, Helena; Cunha, ÂngelaIron (Fe) bioavailability to plants is reduced in saline soils; however, the exact mechanisms underlying this effect are not yet completely understood. Siderophore-expressing rhizobacteria may represent a promising alternative to chemical fertilizers by simultaneously tackling salt-stress effects and Fe limitation in saline soils. In addition to draught, plants growing in arid soils face two other major challen...
Phthalocyanine-sulfonamide conjugates: synthesis and photodynamic inactivation ...
da Silva, Raquel Nunes; Cunha, Ângela; Tomé, Augusto C.Phthalocyanines bearing four or eight sulfonamide units were synthesized and their efficiency in the photodynamic inactivation of Gram-negative (Escherichia coli) and Gram-positive (Staphylococcus aureus) bacteria was evaluated. Conjugates with simpler sulfonamide units (N,N-diethylbenzenesulfonamide, N-isopropylbenzenesulfonamide and N-(4-methoxyphenyl)benzenesulfonamide) caused stronger inactivation than thos...
Microbial remediation of organometals and oil hydrocarbons in the marine enviro...
Cruz, Andreia; Cavaleiro, Ana Júlia; Paulo, Ana M. S.; Louvado, António; Alves, M. M.; Almeida, Adelaide; Cunha, ÂngelaMarine environments are exposed to pollution that mostly results from human activities. Organometals and oil hydrocarbons are among the most hazardous pollutants. In surface waters and along the water column, these compounds are more easily degraded than in sediments, especially under anoxic conditions, where they are highly persistent. Due to their negative impact in living organisms, decontamination of pollut...
Chitosan-genipin film, a sustainable methodology for wine preservation
Nunes, Cláudia; Maricato, Élia; Cunha, Ângela; Rocha, M. Angélica M.; Santos, Sofia; Ferreira, Paula; Silva, Manuel A.; Rodrigues, Ana; Amado, OsvaldoA novel approach is described using chitosan–genipin films as a sustainable method for wine preservation. Films prepared from fungi and from shrimp by-products showed similar mechanical and chemical properties. In addition, shrimp derived films showed no IgE positive reaction against shellfish allergenic compounds. The chitosan–genipin films were used to produce white wines without the addition of sulphur dioxi...