6 documents found, page 1 of 1
Effects of Electron Beam Radiation on the Phenolic Composition and Bioactive Pr...
Madureira, Joana; Gonçalves, Inês; Cardoso, Jéssica; Dias, Maria Inês; Santos, Pedro M.P.; Margaça, Fernanda M.A.; Santos-Buelga, CelestinoOlive pomace is an agro-industrial waste product generated from the olive oil industry and constituted by bioactive compounds with potential applications in several industrial sectors. The purpose of this work was to evaluate the effects of electron beam (e-beam) radiation on olive pomace, specifically on phenolic compounds (by HPLC-DAD-ESI/MS) and the bioactive properties (antioxidant, antiproliferative, and a...
Applications of bioactive compounds extracted from olive industry wastes: a review
Madureira, Joana; Margaça, Fernanda M.A.; Santos-Buelga, Celestino; Ferreira, Isabel C.F.R.; Cabo Verde, Sandra; Barros, LillianThe wastes generated during the olive oil extraction process, even if presenting a negative impact for the environment, contain several bioactive compounds that have considerable health benefits. After suitable extraction and purification, these compounds can be used as food antioxidants or as active ingredients in nutraceutical and cosmetic products due to their interesting technological and pharmaceutical pro...
Preservation treatment of fresh raspberries by e-beam irradiation
Elias, M.I.; Madureira, Joana; Santos, P.M.P.; Carolino, M.M.; Margaça, Fernanda M.A.; Cabo Verde, SandraE-beam irradiation was studied as a post-harvest treatment for red raspberries (Rubus idaeus L.). Microbial inactivation (natural microbiota and potential pathogenic bacteria) and bioactive properties (phenolic content, vitamin C content and antioxidant activity and cytotoxicity) of these fruits were evaluated before and after irradiation and during storage of 14 days at 4 °C. A reduction of 2 log CFU/g of meso...
Effects of gamma radiation on cork wastewater: Antioxidant activity and toxicity
Madureira, Joana; Pimenta, Andreia I.; Popescu, Larisa; Besleaga, Alexandra; Dias, Maria Inês; Santos, Pedro M.P.; Melo, Rita; Ferreira, Isabel C.F.R.A comprehensive assessment of the toxicity and antioxidant activity of cork boiling wastewater and the effects of gamma radiation on these parameters was performed. Antioxidant activity was evaluated using different methodologies as DPPH radical scavenging activity, reducing power and inhibition of ß-carotene bleaching. The results have shown that gamma radiation can induce an increase on the antioxidant activi...
Degradation of compounds present in cork boiling water by gamma radiation
Madureira, Joana; Barros, Lillian; Melo, Rita; Santos, Pedro M.P.; Falcão, António N.; Cabo Verde, Sandra; Ferreira, Isabel C.F.R.Cork boiling water is an aqueous and complex dark liquor with high concentration of phenolic compounds such as phenolic acids and tannins [1, 2], which are considered biorecalcitrants [2]. Ionizing radiation has been widely studied as an alternative technology for the degradation of organic contaminants without the addition of any other (e.g.: Fenton technologies). The aim of this work was to identify the compo...
Padrões de inactivação microbiana em hortelã-pimenta por radiação gama
Guerreiro, Duarte; Pimenta, Andreia I.; Antonio, Amilcar L.; Ferreira, Isabel C.F.R.; Santos, Pedro M.P.; Falcão, António N.; Margaça, Fernanda M.A.As plantas podem ser utilizadas como aditivos alimentares e em benefício da saúde, como ingredientes em formulações de alimentos funcionais e nutracêuticos. Um dos principais problemas associado ao seu consumo e comercialização é a sua contaminação microbiana, que pode ocorrer ao longo da colheita, no processamento e na distribuição. Deste modo, torna-se necessário encontrar uma solução viável para a conservaçã...