Mechanical damage and thermal effect induced by ultrasonic treatment in olive leaf tissue. Impact on polyphenols recovery - Université de technologie de Compiègne Accéder directement au contenu
Article Dans Une Revue Ultrasonics Sonochemistry Année : 2022

Mechanical damage and thermal effect induced by ultrasonic treatment in olive leaf tissue. Impact on polyphenols recovery

Résumé

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 Z D 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 Z D 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.
Fichier principal
Vignette du fichier
Mechanical damage and thermal effect induced by ultrasonic treatment in olive leaf tissue.pdf (2.01 Mo) Télécharger le fichier
Origine Fichiers éditeurs autorisés sur une archive ouverte
Licence

Dates et versions

hal-04356255 , version 1 (20-12-2023)

Licence

Identifiants

Citer

Anna-Maria Abi-Khattar, Nadia Boussetta, Hiba N Rajha, Roula M Abdel-Massih, Nicolas Louka, et al.. Mechanical damage and thermal effect induced by ultrasonic treatment in olive leaf tissue. Impact on polyphenols recovery. Ultrasonics Sonochemistry, 2022, 82, pp.105895. ⟨10.1016/j.ultsonch.2021.105895⟩. ⟨hal-04356255⟩
9 Consultations
11 Téléchargements

Altmetric

Partager

Gmail Mastodon Facebook X LinkedIn More