25 documents found, page 1 of 3
Hydroxypropyl methylcellulose-based micro- and nanostructures for encapsulation...
Silva, Pedro Miguel Peixoto; Prieto, C.; Andrade, C. C. P.; Lagarón, J. M.; Pastrana, L. M.; Coimbra, M. A.; Vicente, A. A.Electrohydrodynamic processing (EHDP) allows the use of a wide range of biopolymers and solvents, including food-grade biopolymers and green solvents, for the development of micro- and nanostructures. These structures present a high surface-area-to-volume ratio and different shapes and morphologies. The aim of this work was to design and produce hydroxypropyl methylcellulose (HPMC)-based micro- and nanostructur...
OC33 Chromatographic approaches to study pine nut skin: exploitation of its com...
Silva, Soraia P.; Colunga, Alondra; Roupar, Dalila; Salvador, Andreia Filipa Ferreira; Nobre, Clarisse; Reis, S. F.; Freitas, V.; Coimbra, M. A.Pine nut skin (PNS) is an unexploited and uncharacterized by-product recovered during pine nut processing. The exploitation of by-products as sources of valuable compounds agrees with the current demand for the reduction of waste, and a transition to more sustainable production and consumption1. Therefore, PNS characterization and bioactive potentialities were assessed. The utilization of several chromatographi...
Food-grade hydroxypropyl methylcellulose-based formulations for electrohydrodyn...
Silva, Pedro; Prieto, C.; Lagarón, J. M.; Pastrana, L. M.; Coimbra, M. A.; Vicente, A. A.; Cerqueira, M. A.Electrohydrodynamic (EHD) processing allows the production of micro and nano structures with high surface-area-to-volume ratio from biopolymers and environmentally friendly solvents. Such structures hold a very significant potential for application in the food area. The aim of this work was to assess the role of solution parameters in the formation of hydroxypropyl methylcellulose (HPMC)-based micro and nanostr...
Effect of extraction temperature on rheological behavior and antioxidant capaci...
Vieira, J. M.; Mantovani, R. A.; Raposo, M. F. J.; Coimbra, M. A.; Vicente, A. A.; Cunha, R. L.Soluble flaxseed gum (SFG) extracted at different temperatures (25, 40, and 60°C) was analyzed in relation to the yield, polysaccharides and phenolics composition, surface charge, color, and rheological properties. The yield of SFG extract increased as the extraction temperature increased. The SFG xylan was the main component regardless the extraction temperature, but a reduction of substituents on the xylose c...
Structure, rheology, and copper-complexation of a hyaluronan-like exopolysaccha...
Martin-Pastor, M.; Ferreira, A. S.; Moppert, X.; Nunes, C.; Coimbra, M. A.; Reis, R. L.; Guezennec, J.; Novoa-Carballal, RamonMO245 exopolysaccharide (EPS) was produced in laboratory conditions from Vibrio genus microorganism isolated from bacterial mats found in Moorea Island. Its structure consists of a linear tetrasaccharide repeating unit â 4)-β-D-GlcpA-(1â 4)-α-D-GalpNAc-(1â 3)-β-D-GlcpNAc-(1â 4)-β-D-GlcpA-(1â containing covalently-linked 5% of glucose, galactose, and rhamnose, determined by methylation analyses and NMR spe...
In vitro digestibility and fermentability of fructo-oligosaccharides produced b...
Nobre, Clarisse; Sousa, S. C.; Silva, S. P.; Pinheiro, Ana Cristina; Coelho, E.; Vicente, A. A.; Gomes, A. M. P.; Coimbra, M. A.; Teixeira, J. A.The bifidogenic potential of fructo-oligosaccharides (FOS) produced by a newly isolated strain Aspergillus ibericus was studied. Their activity was compared to FOS produced by Aureobasidium pullulans and to a non-microbial commercial FOS sample (Raftilose® P95). FOS fermentability by a number of probiotic bacteria and their hydrolytic resistance to the simulated harsh conditions of the digestive system was eval...
Xylo-oligosaccharides display a prebiotic activity when used to supplement whea...
Ribeiro, T.; Cardoso, V.; Ferreira, L. M. A.; Lordelo, M. M. S.; Coelho, E.; Moreira, A. S. P.; Domingues, M. R. M.; Coimbra, M. A.; Bedford, M. R.It is now well established that exogenous β-1,4-xylanases improve the nutritive value of wheat-based diets for poultry. Among other factors, the mechanism of action of exogenous enzymes may involve a microbial route resulting from the generation of prebiotic xylo-oligosaccharides (XOS) in the birds' gastro-intestinal (GI) tract. In a series of three experiments, the effect of XOS on the performance of broilers ...
Dextrin-based hydrogel for the development of injectable bone substitute
Pereira, Isabel; Simões, J.; Fraga, S.; Maltez, L.; Evtuguin, D. V.; Domingues, R. M.; Coimbra, M. A.; Teixeira, J. P.; Maurício, A. C.; Santos, J. D.[Excerpt] The development of injectable bone substitutes (IBS) have garnered great importance in the bone regeneration field, as a strategy to reach areas of the body using minimally invasive procedures, and showing the ability of perfect fitting according to irregularities of bone tissue defects. In this context, the combination of injectable hydrogels and ceramic granules is emerging as a well-established tre...
Unravelling the behaviour of curcumin nanoemulsions during in vitro digestion: ...
Pinheiro, Ana Cristina; Silva, Hélder D.; Azevedo, Alexandra; Cerqueira, Miguel Ângelo Parente Ribeiro; Coimbra, M. A.; Vicente, A. A.
Microwave-Assisted Extraction of Brewers' Spent Grain Arabinoxylans
Rocha, M. A. M.; Saraiva, J.; Coimbra, M. A.Brewers´ spent grain (BSG) is a by-product from beer industry that can be exploited as a source of arabinoxylo-oligosaccharides (AXOS) with prebiotic activity. In this study, microwave-assisted extractions were performed during 2 min at 140-210°Cin order to evaluate the feasibility of this extraction technology for quantitative extraction of the arabinoxylans (AX) or AXOS from BSG. The AX yield increasedwith th...