6 documents found, page 1 of 1
Ser ou não ser praxado? A teoria da ação planeada como modelo para compreender ...
Correia, I.; Alves, D.; Jarego, M.; Lopes, K.; Rodrigues, D.; Abrantes, L.; Boloca, A.; Carvalho, B.; Diogo, M.; Grosso, C.; Massa, M. F.; Mateus, R.Com este estudo pretendemos investigar quais são os preditores da intenção de participação dos caloiros na praxe académica. Para tal, recorremos à teoria da ação planeada (Ajzen, 1991) que permite analisar o peso relativo das atitudes, da norma subjetiva, e do controlo comportamental percebido nas intenções de ser praxado. Os participantes, estudantes universitários (N = 353) a frequentar o 1º ano de uma Licenc...
Phenolic profile, antioxidant activity and enzyme inhibitory activities of extr...
Goncalves, Sandra; Moreira, Elsa; Grosso, C.; Andrade, Paula B.; Valentao, Patricia; Romano, AnabelaThe antioxidant and enzyme inhibitory properties of methanolic extracts from four aromatic plants used in traditional medicine and food [Calamintha nepeta (L.) Savi subsp. nepeta, Helichrysum italicum subsp. picardii Franco, Mentha spicata L. and Origanum vulgare subsp. virens (Hoffmanns. & Link) Bonnier & Layens] were evaluated. The extract from O. vulgare exhibited the strongest DPPH (IC50 of 4.65 +/- 0.12 mu...
Modelling and optimization of ethyl butyrate production catalysed by Rhizopus o...
Grosso, C.; Ferreira-Dias, Suzana; Pires-Cabral, P.Response surface methodology was used to model and optimise the production of ethyl butyrate, catalysed by Rhizopus oryzae lipase immobilised in a hydrophilic polyurethane foam. Experiments were carried out following a central composite rotatable design, as a function of reaction temperature (T: 22–38 C) initial butyric acid concentration (A: 0.031–0.619 M) and initial molar ratio ethanol/acid (MR; 0.257–2.443)...
Mathematical modelling of supercritical CO2 extraction of volatile oils from ar...
Grosso, C.; Coelho, Jose; Pessoa, F. L. P.; Fareleira, J. M. N. A.; Barroso, J. G.; Urieta, J. S.; Palavra, A. F.; Sovova, H.The modelling of the experimental data of the extraction of the volatile oil from six aromatic plants (coriander, fennel, savoury, winter savoury, cotton lavender and thyme) was performed using five mathematical models, based on differential mass balances. In all cases the extraction was internal diffusion controlled and the internal mass transfer coefficienty (k(s)) have been found to change with pressure, tem...
Phytochemical profile and anticholinesterase and antimicobial activities of sup...
Silva, Filipa; Martins, A.; Salta, J.; Neng, N. R.; Nogueira, J.; Mira, Delfina; Gaspar, Natália; Justino, Jorge; Grosso, C.; Urieta, J. S.Winter savory Satureja montana is a medicinal herb used in traditional gastronomy for seasoning meats and salads. This study reports a comparison between conventional (hydrodistillation, HID, and Soxhlet extraction, SE) and alternative (supercritical fluid extraction, SFE) extraction methods to assess the best option to obtain bioactive compounds. Two different types of extracts were tested, the volatile (SFE-9...
Evaluation of the essential oil composition of fruits of three endemic species ...
Grosso, C.; Teixeira, G.; Games, I; Martins, E. S.; Barroso, J. G.; Pedro, L. G.; Figueiredo, A. C.