Please use this identifier to cite or link to this item: https://scholarhub.balamand.edu.lb/handle/uob/5281
Title: Mechanical damage and thermal effect induced by ultrasonic treatment in olive leaf tissue. Impact on polyphenols recovery
Authors: Abi-Khattar, Anna-Maria
Boussetta, Nadia
Rajha, Hiba N.
Abdel-Massih, Roula
Louka, Nicolas
Maroun, Richard G.
Vorobiev, Eugene
Debs, Esperance 
Affiliations: Centre d’Analyses et de Recherche, Unité de Recherche Technologies et Valorisation Agro-Alimentaire, Faculté des Sciences, Saint-Joseph University, P. O. Box 17-5208 Riad El Solh, Beirut 1104 2020, Lebanon
Université de Technologie de Compiègne, Génie des Procédés Industriels, EA 4297, Unité Transformations Intégrées de la Matière Renouvelable, 60205 Compiègne Cedex, France
Ecole Supérieure d’Ingénieurs de Beyrouth (ESIB), Saint-Joseph University, CST Mkalles Mar Roukos, P. O. Box 11-514, Riad El Solh, Beirut 1107 2050, Lebanon
Department of Biology, Faculty of Arts and Sciences, University of Balamand, P. O. Box 100, Tripoli, Lebanon
Centre d’Analyses et de Recherche, Unité de Recherche Technologies et Valorisation Agro-Alimentaire, Faculté des Sciences, Saint-Joseph University, P. O. Box 17-5208 Riad El Solh, Beirut 1104 2020, Lebanon
Centre d’Analyses et de Recherche, Unité de Recherche Technologies et Valorisation Agro-Alimentaire, Faculté des Sciences, Saint-Joseph University, P. O. Box 17-5208 Riad El Solh, Beirut 1104 2020, Lebanon
Université de Technologie de Compiègne, Génie des Procédés Industriels, EA 4297, Unité Transformations Intégrées de la Matière Renouvelable, 60205 Compiègne Cedex, France
Department of Biology 
Keywords: Olive leaves
Ultrasound-assisted extraction
Diffusivity disintegration index
Electrical conductivity
Mechanical damage
Issue Date: 2022
Publisher: Elsevier
Part of: Ultrasonics Sonochemistry
Volume: 82
Issue: 105895
Start page: 1
End page: 7
Abstract: 
The influence of ultrasound treatment (US) on cellular damage of olive leaf tissue was studied. Mechanical damage and thermal effect of US were characterized. The level of tissue damage was defined by the diffusivity disintegration index ZD based on the diffusivity of solutes extracted from olive leaves differently treated. The Arrhenius form using the temperature dependences of the thermal treatment time within the temperature interval 20–90 °C was observed for the thermal process. The corresponding activation energy ΔUT was estimated as 57 kJ/mol. The temperature dependences of electrical conductivity were measured for extracts of intact and maximally treated olive leaves. Then the diffusivity disintegration index ZD and total phenolic compounds recovery for three studied US powers were calculated (100, 200, and 400 W). The results evidenced that the mechanically stimulated damage in olive leaf tissue can occur even at a low US power of 100 W if treatment time is long enough (t = 3.5 h). The US treatment noticeably accelerated the diffusion process mechanically in addition to its thermal effect. Trials in aqueous solution revealed the dependence of polyphenols extraction on damage level with respect to the US power applied.
URI: https://scholarhub.balamand.edu.lb/handle/uob/5281
DOI: https://doi.org/10.1016/j.ultsonch.2021.105895
Ezproxy URL: Link to full text
Type: Journal Article
Appears in Collections:Department of Biology

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