Advisor(s)
Abstract(s)
Olive pomace is an environmentally detrimental waste from olive oil industry, containing large amounts of bioactive
compounds that might be used by the food industry. In this work, the effects of gamma radiation on phenolic
compounds and bioactive properties (antioxidant, antimicrobial activities and hepatotoxicity) of Crude
Olive Pomace (COP) and Extracted Olive Pomace (EOP) extracts were evaluated. Hydroxytyrosol was the main
phenolic compound identified in both olive pomace extracts (24–25 mg/g). The gamma radiation treatment of
olive pomace improved at least 2-fold the extractability of phenolic compounds. Moreover, results suggested
that gamma radiation at 5 kGy increased the antioxidant activity in EOP, while keeping the ability to protect
erythrocytes against oxidation-induced haemolysis. Gamma radiation at 5 kGy could be a suitable technology
for olive oil pomaceswaste valorization, contributing to enhance extraction of phenolic compounds and bioactive
properties, especially when applied on extracted material.
Description
Keywords
Bioactivity Industrial wastes valorization Ionizing radiation applications Olive pomace Phenolic compounds
Pedagogical Context
Citation
Madureira, Joana; Dias, Maria Inês; Pinela, José; Calhelha, Ricardo C.; Barros, Lillian; Santos-Buelga, Celestino; Margaça, Fernanda M.A.; Ferreira, Isabel C.F.R.; Cabo Verde, Sandra (2020). The use of gamma radiation for extractability improvement of bioactive compounds in olive oil wastes. Science of the Total Environment. ISSN 0048-9697. 727, p. 1-11