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Monitoring the Bioactive Compounds Status in Olea europaea According to Collecting Period and Drying Conditions

1
Laboratoire de Biotechnologie de l’Olivier, Centre de Biotechnologie de Borj-Cedria, B/P 901 Hammam-Lif 2050, Tunisia
2
Department of Food Science and Nutrition, University of Granada, Campus Universitario s/n, 18071 Granada, Spain
3
Center of Research and Development of Functional Food, Health Science Technological Park, Avda. del Conocimiento s/n, 18100 Granada, Spain
4
Department of Analytical Chemistry, Faculty of Sciences, University of Granada, Granada 18071, Spain
5
Department of Integrative Biotechnology, Sungkyunkwan University, 2066 Seobu-ro, Suwon 16419, Korea
*
Author to whom correspondence should be addressed.
Energies 2019, 12(5), 947; https://doi.org/10.3390/en12050947
Received: 4 January 2019 / Revised: 4 March 2019 / Accepted: 6 March 2019 / Published: 12 March 2019
(This article belongs to the Special Issue Biorefinery Based on Olive Biomass)
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Abstract

Polyphenols and triterpenoids in olive have relevant importance both in the physiology of the plant and the nutritional and biological value of its products. Olive leaf extracts are of special interest for their numerous health-promoting properties. The present research is investigating the occurrence of phytochemicals in supercritical fluid extracts from leaves with regard to collection time and drying temperature. The phytochemical profiles of the olive leaf extracts were determined by reversed-phase high-performance liquid chromatography (HPLC) coupled to electrospray ionization time-of-flight mass spectrometry (ESI-TOF-MS) detection. The main extracted phytochemicals were phenols and terpenoids. A significant variation in the amounts of the different components was observed as a function of the different drying temperature and collecting time (p < 0.05). Among samples, the maximal contents of polyphenols and secoiridoid derivatives were found in the extracts from olive leaves collected in November and dried at 120 °C, whereas triterpenoids showed the highest content in fresh leaves collected in August. View Full-Text
Keywords: Olea europaea; supercritical fluid extraction; triterpenoids; polyphenols; olive leaves Olea europaea; supercritical fluid extraction; triterpenoids; polyphenols; olive leaves
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Taamalli, A.; Lozano Sánchez, J.; Jebabli, H.; Trabelsi, N.; Abaza, L.; Segura Carretero, A.; Youl Cho, J.; Arráez Román, D. Monitoring the Bioactive Compounds Status in Olea europaea According to Collecting Period and Drying Conditions. Energies 2019, 12, 947.

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