Olive Leaves Extract from Algerian Oleaster (Olea europaea var. sylvestris) on Microbiological Safety and Shelf-life Stability of Raw Halal Minced Beef during Display

Djenane, D. ; Gomez, D. (Universidad de Zaragoza) ; Yangüela, J. (Universidad de Zaragoza) ; Roncales, P. (Universidad de Zaragoza) ; Ariño, A. (Universidad de Zaragoza)

Resumen: Oleaster (wild olive tree) by-products represent a renewable and low-cost source of biopolyphenols. Leaf extracts (sylv.OLE) of Algerian oleaster, locally called a'hachad (Olea europaea subsp. europaea var. sylvestris), were applied at 1 and 5% (v/w) to raw Halal 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 (p < 0.05). The addition of sylv.OLE reduced psychrotrophic counts as well as the level of pathogens (Salmonella enterica ser. Enteritidis and Shiga toxin-producing Escherichia coli 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% (p < 0.05). The presence of sylv.OLE at the tested concentrations did not negatively influence the overall acceptability and bitterness of HMB.

Idioma: Inglés

DOI: 10.3390/foods8010010

Año: 2019

Publicado en: Foods 8, 1 (2019), 10 [17 pp]
ISSN: 2304-8158

Factor impacto JCR: 4.092 (2019)

Categ. JCR: FOOD SCIENCE & TECHNOLOGY rank: 27 / 139 = 0.194 (2019) - Q1 - T1

Factor impacto SCIMAGO: 0.661 - Food Science (Q2) - Health (social science) (Q2) - Plant Science (Q2) - Health Professions (miscellaneous) (Q2) - Microbiology (Q3)

Financiación: info:eu-repo/grantAgreement/ES/DGA-FEDER/A06-17R
Financiación: info:eu-repo/grantAgreement/ES/MAEC/PCI-MED-ALI A-033506-10

Tipo y forma: Article (Published version)

Área (Departamento): Área Nutrición Bromatología (Dpto. Produc.Animal Cienc.Ali.)
Área (Departamento): Área Tecnología de Alimentos (Dpto. Produc.Animal Cienc.Ali.)