Home About us MoEF Contact us Sitemap Tamil Website  
About Envis
Whats New
Microorganisms
Research on Microbes
Database
Bibliography
Publications
Library
E-Resources
Microbiology Experts
Events
Online Submission
Access Statistics

Site Visitors

blog tracking


 
LWT
Vol. 93, 2018, Pages: 323-328


Phenolic composition and antimicrobial activity of Algerian olive products and by-products

Wahiba Yakhlef, Rabah Arhab, Concepción Romero, Manuel Brenes, Antoniode Castro, Eduardo Medina

Department of Molecular and Cellular Biology, Abbes Laghrour University, Khenchela, Algeria.

Abstract

This work characterized the phenolic profile of virgin olive oil, pomace, and olive mill wastewater (OMWW) of the three Algerian cultivars Blanquette, Rouguette and Sigoise, which were generated by traditional discontinuous press and 3-phase centrifugal extraction processes. Results revealed the cv. Blanquette as the cultivar with the highest phenolic content and no conclusive differences between the oil extraction processes were found. The antimicrobial activity exerted by OMWW and olive oils was attributed to their phenolic content, especially glutaraldehyde-like compounds. The most bactericidal OMWW, which presented the highest phenolic concentration (10,828 mg/L), showed a minimal bactericidal concentration (MBC) of 2.5% for all target microorganisms. In addition, a concentration of 452 mg/kg of total polyphenols in the olive oil reduced more than 3 log units from the initial inoculum in 30 min. Olive derived products showed a remarkable antimicrobial activity that makes them a good source of natural antimicrobials.

Keywords: Olive cultivars, Olive oil, Olive mill wastewaters, Polyphenols, Antimicrobials.

Copyright © 2005 ENVIS Centre ! All rights reserved
This site is optimized for 1024 x 768 screen resolution