@misc{10481/58951,
year = {2017},
month = {9},
url = {http://hdl.handle.net/10481/58951},
abstract = {The goal of this work was to monitor the hydrophilic profile of the virgin olive oil (VOO)
of the second main Tunisian variety, ‘‘Chétoui”, in order to achieve a better understanding of the
behavior of the bioactive phenolic compounds during 0, 2, 5, 10, and 15 min of microwave heating
at medium power 800 W, and 0, 2.5, and 5 h of conventional heating at 180 ºC. The extent of the
oxidative and hydrolytic degradation of the different phenolic subclasses was evaluated using highperformance
liquid chromatography (HPLC) coupled to electrospray time-of-flight mass spectrometry
(TOF-MS) method. During heating process, the most represented component in Chétoui VOO
was found to be isomer 1 and 2 of deacetoxy oleuropein aglycone, and hydroxy decarboxy oleuropein
aglycon. These compounds may be considered as direct markers for the degree of transformation
of secoiridoids during heating process. Among the studied phenolic compounds,
hydroxytyrosol, tyrosol, luteolin and apigenin displayed the highest heating resistance in the whole
time range of microwave and conventional applications. However, the main secoiridoids quantified
in the fresh VOO, isomer 2 of oleuropein aglycone, and ligstroside aglycone, decreased in concentration
with the thermal treatment and this decrease was drastic under conventional heating.},
organization = {This work was supported by the Ministry of High Education,
and Scientific Research in Tunisia, and the Spanish Ministry of
Economy and Competitiveness (MINECO) (AGL2015-67995-
C3-2-R) and the Andalusian Regional Government Council
(P11-CTS-7625).},
publisher = {Elsevier BV},
keywords = {Tunisian olive variety},
keywords = {Olive oil degradation},
keywords = {Thermo-oxidation},
keywords = {Phenolic compounds},
keywords = {Conventional oven},
title = {Assessment of conventional and microwave heating effects on the variation of the bioactive compounds of Chétoui VOO using HPLC-DAD-ESI-TOF-MS},
doi = {10.1016/j.arabjc.2017.08.011},
author = {Oueslati, Imen and Taamalli, Amani and Arráez Román, David and Segura Carretero, Antonio},
}