5 documents found, page 1 of 1
Response surface modelling of the consumption of bitter compounds from orange j...
Ribeiro, MHL; Silveira, D; Ebert, C; Ferreira-Dias, SIn certain varieties of oranges, an increase in bitterness is currently observed in juices, after extraction, restraining their industrial use. This has been explained by the conversion of the nonbitter precursor, limonoate A-ring lactone, to a bitter compound, limonin, under acidic conditions. The aim of this study was the modelling of limonin consumption in raw and sterilized orange juices by Acinetobacter ca...
The use of different adsorbents for selective removal of compounds from olive r...
Ferreira-Dias, S; Monteiro, JP; Ribeiro, MHLThe selective removal of several impurities from a solution of crude olive residue oil in n-hexane (miscella) using batch adsorption by different materials, used separately or in sequence, was investigated. The following adsorbents were tested: activated diatomaceous earths, powdered activated carbon and synthetic neutral resins ("Amberlite XAD-4, XAD-7, XAD-16). The adsorption efficiency of every group of comp...
Selective adsorption of limonin and naringin from orange juice to natural and s...
Ribeiro, MHL; Silveira, D; Ferreira-Dias, SIn the majority of citrus juices, bitterness is mainly ascribed to the presence of limonoids (triterpenes) and flavanone glycosides (flavonoids), namely limonin and naringin. In this study, the selective removal of limonin and naringin from citrus juice by batch adsorption to different materials was investigated. Since the removal of reducing sugars, pigments and vitamin C may also occur, the eventual adsorptio...
Kinetics of selective adsorption of impurities from a crude vegetable oil in he...
Ribeiro, MHL; Lourenco, PAS; Monteiro, JP; Ferreira-Dias, SIn this study, the selective removal of several impurities (chlorophylls and pheophytins, carotenoids, free fatty acids and oxidation products) from a solution of crude olive residue oil in n-hexane (miscella) by batch adsorption to different materials was investigated. The following adsorbents were tested: activated diatomaceous earths, powdered and granulated activated carbons. For the majority of the adsorbe...
Modelling adsorption of impurities from a vegetable oil in organic solution
Ferreira-Dias, S; Ribeiro, MHL; Lourenco, PASIn this study, the use of blends of activated powdered carbon and activated earths for the selective removal of several impurities (pigments, free fatty acids and oxidation products) directly from the solution of crude olive residue oil in n-hexane (miscella) was investigated. The optimization of batch adsorption process was carried out in a 30% oil miscella (the usual miscella concentration) via the Response S...