Olive Leaves Extract from Algerian Oleaster ( Var. ) on Microbiological Safety and Shelf-life Stability of Raw Minced Beef During Display
Overview
Affiliations
Oleaster (wild olive tree) by-products represent a renewable and low-cost source of biopolyphenols. Leaf extracts (sylv.OLE) of Algerian oleaster, locally called ( subsp. var. ), were applied at 1 and 5% (v/w) to raw minced beef (HMB) in order to test its safety and shelf-life prolongation during retail/display. The total phenolic compound content in the extract was 198.7 ± 3.6 mg gallic acid equivalent. Ten compounds were identified in the sylv.OLE by High Performance Liquid Chromatography/Diode Array Detector (HPLC/DAD), of which oleuropein was the most abundant (43.25%). Samples treated with 5% sylv.OLE had significantly higher antimicrobial and antioxidant effects than those treated with 1% extract ( < 0.05). The addition of sylv.OLE reduced psychrotrophic counts as well as the level of pathogens ( ser. Enteritidis and Shiga toxin-producing O157:H7). A thiobarbituric acid reactive substance (TBARS) value of 2.42 ± 0.11 was reached throughout six days of retail/display in control samples, while the addition of 5% sylv.OLE reduced TBARS value by 58% ( < 0.05). The presence of sylv.OLE at the tested concentrations did not negatively influence the overall acceptability and bitterness of HMB.
Altissimi C, Roila R, Ranucci D, Branciari R, Cai D, Paulsen P Foods. 2024; 13(5).
PMID: 38472771 PMC: 10930796. DOI: 10.3390/foods13050658.
Djenane D, Ben Miri Y, Arino A Foods. 2023; 12(15).
PMID: 37569200 PMC: 10418402. DOI: 10.3390/foods12152931.
Al Mnshad D, Al Joudi A, Jawad L, Al - Arch Razi Inst. 2023; 77(5):1799-1804.
PMID: 37123137 PMC: 10133615. DOI: 10.22092/ARI.2022.358331.2196.
Dirpan A, Djalal M, Ainani A Foods. 2022; 11(10).
PMID: 35627064 PMC: 9141895. DOI: 10.3390/foods11101495.
Nardella S, Conte A, Del Nobile M Foods. 2022; 11(5).
PMID: 35267298 PMC: 8909788. DOI: 10.3390/foods11050665.