16 documents found, page 1 of 2
Phytochemical Composition of Extractives in the Inner Cork Layer of Cork Oaks w...
Simões, Rita; Branco, Manuela; Nogueira, Carla; Carvalho, Carolina; Santos-Silva, Conceição; Ferreira-Dias, S.; Miranda, Isabel; Pereira, HelenaThe beetle Coraebus undatus, during its larval stage feeds, and excavates galleries on the cork-generating layer of Quercus suber L. trees, seriously affecting the cork quality with significant economic losses for the cork industry. This work compared the composition of the extracts present in the innermost cork layers (the belly) of cork planks from Q. suber trees with low and moderate C. undatus attack in one...
Integrated Bioprocess for Structured Lipids, Emulsifiers and Biodiesel Producti...
Heinzl, G.C.; Mota, D.A.; Martinis, V.; Martins, A.S.; Soares, C.M.F.; Osório, N.; Gominho, J.; Nampoothiri, K.M.; Sukumaran, R.K.; Pereira, H.Olive pomace oil (OPO), a by-product of olive oil industry, is directly consumed after refining. The novelty of this study consists of the direct use of crude high acidic OPO (3.4–20% acidity) to produce added-value compounds, using sn-1,3-regioselective lipases: (i) low-calorie dietetic structured lipids (SL) containing caprylic (C8:0) or capric (C10:0) acids by acidolysis or interesterification with their eth...
Phytochemical characterization of phloem in maritime pine and stone pine in thr...
Simões, R.; Pimentel, C.; Ferreira-Dias, S.; Miranda, I.; Pereira, H.This study analyzes the content and chemical profile of extractives present in the young phloem of mature trees of maritime pine (Pinus pinaster) and stone pine (P. pinea) in three sites in Portugal located in different climatic environments. The cross-sites average of extractives was similar in both pines with 38.5% in P. pinea and 37.7% in P. pinaster phloem. The hydrophilic fraction represented 82% and 70% o...
Optimization of ultrasound-assisted extraction of bioactive compounds from Pelv...
Sousa, Gabriela; Trifunovska, Marija; Antunes, Madalena; Miranda, Isabel; Moldão, Margarida; Delgado Alves, Vitor; Vidrih, Rajko; Lopes, Paula AllenIn this study, Pelvetia canaliculata L. macroalga, collected from the Atlantic Portuguese coast, was used as a source of bioactive compounds, mostly antioxidants, to incorporate them in sunflower oil with the aim of increasing its biological value and oxidative stability. The lyophilized alga was added to the oil, and ultrasound-assisted extraction (UAE) was performed. Algae concentration and UAE time varied fo...
Co-processed olive oils with Thymus mastichina L. - New product optimization
Peres, Fátima; Roldão, Marta; Mourato, Miguel; Louro Martins, Luisa; Ferreira-Dias, S.Olive co-processing consists of the addition of ingredients either in the mill or in the malaxator. This technique allows selecting the type of olives, the ingredients with the greatest flavoring and bioactive potential, and the technological extraction conditions. A new product—a gourmet flavored oil—was developed by co-processing olives with Thymus mastichina L. The trials were performed using overripe fruits...
Impact of irrigation in production and oil properties in intensive and hedgerow...
Mota, M.; Nogueira, A. M.; Guimarães, A.; Gonzalez, L. F. [UNESP]; Paço, T. A.; Correia, M. M.; Coelho, R.; Vaz, M.; Santos, F. L.; Alegre, A. H.Made available in DSpace on 2018-12-11T16:37:46Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-06-20; Mountain Equipment Co-op; The Alentejo region in southern Portugal is characterized by a Mediterranean climate of mild temperature associated with annual rainfall in winter and hot and dry season in the summer, demanding a frequent irrigation in this season. This work evaluates the effects of irrigation...
Application of unsteady-state heat transfer equations to thermal process of mor...
Pereira, Jorge; Ferreira-Dias, S.; Dionísio, Lídia; Patarata, L.; Matos, T. J. S.Morcela de Arroz (MA) is a popular cooked blood and rice sausage produced following empirical procedures in the Monchique region, south of Portugal. Presenting high pH (about 6.5) and water activity (around 0.97), it is commercialized without preservatives, unpacked and with restricted commercialization period (1 week at 0C-5C). The aim of this study was (i) to assess the adequacy of unsteady-state heat transfe...
A response surface methodology study on the role of factors affecting growth an...
Chandra, M.; Barata, A.; Ferreira-Dias, S.; Malfeito-Ferreira, Manuel; Loureiro, VirgilioThe present study was aimed at determining the effect of glucose, ethanol and sulphur dioxide on the growth and volatile phenol production by Brettanomyces bruxellensis in red wines using a response surface methodology approach. Sulphur dioxide proved to have a significant (p < 0.05) negative linear and quadratic effect on growth and 4-ethylphenol production. Concentrations of sulphur dioxide higher than 20 mg ...
Avaliação da qualidade do azeite durante o processo de fritura
Carapinha, P.; Correia, A.C.; Ferreira-Dias, S.Olive oil is the main lipid source in the Mediterranean diet. Due to its richness in monounsaturated fatty acids and in natural antioxidants, the olive oil is highly resistant to oxidation and, therefore, it is an excellent oil to be used in deep frying processes. The aim of the present study was to investigate the quality evolution of two commercial olive oils (extra virgin olive oil and olive oil) during heat...
Production of olive oil enriched with medium chain fatty acids catalysed by com...
Nunes, P.A.; Pires-Cabral, P.; Ferreira-Dias, S.Structured triacylglycerols, containing medium chain fatty acids, were produced by acidolysis of virgin olive oil with caprylic or capric acid, at a molar ratio of olive oil:fatty acid of 1:2, at 45 C for 24 h, in solvent- free media or in n-hexane, catalysed by Thermomyces lanuginosa (Lipozyme TL IM), Rhizomucor miehei (Lipozyme RM IM) and Candida antarctica (Novozym 435) immobilised lipases. Incorporations we...