Open AccessOlive oils from Algeria: Phenolic compounds, antioxidant and antibacterial activities
Author(s) -
Firdousse Laincer,
Rahima Laribi,
Abderezak Tamendjari,
Lekhmici Arrar,
P. Rovellini,
Stefania Venturini
Publication year - 2014
Publication title -
grasas y aceites
Language(s) - Spanish
Resource type - Journals
SCImago Journal Rank - 0.384
H-Index - 46
eISSN - 1988-4214
pISSN - 0017-3495
DOI - 10.3989/gya.035713
Subject(s) - antimicrobial , phenols , dpph , antioxidant , abts , chemistry , food science , bacteria , minimum inhibitory concentration , pathogenic bacteria , scavenging , olive oil , biology , biochemistry , organic chemistry , genetics
The phenolic compositions, antioxidant and antimicrobial activities against six bacteria of phenolic extracts of olive oil varieties from eleven Algerian varieties were investigated. The antioxidant activity was assessed by determining the scavenging effect on the DPPH and ABTS.+ radicals. The antimicrobial activity was measured as a zone of inhibition and minimum inhibitory concentration (MIC) on human harmful and foodborne pathogens. The results show that total phenols was significantly (p < 0.05) correlated with DPPH (r = 0.72) and ABTS.+ radicals (r = 0.76). Among the bacteria tested, S. aureus and to a lesser extent B. subtilis showed the highest sensitivity; the MIC varied from 0.6 to 1.6 mg·mL-1 and 1.2 to 1.8 mg·mL-1, respectively. The results reveal that Algerian olive oils may constitute a good source of antioxidant and antimicrobial agents. Se ha estudiado la composición fenólica y las actividades antioxidante y antimicrobiana, contra seis bacterias, de extractos de aceites de oliva de once variedades argelinas. La actividad antioxidante se evaluó mediante la determinación del efecto captador de radicales de DPPH y ABTS.+. La actividad antimicrobiana se midió como zona de inhibición y como concentración inhibitoria mínima (MIC) sobre bacterias perjudiciales humanas y agentes patógenos transmitidos por los alimentos. Los resultados mostraron que los fenoles totales está significativamente (p < 0,05) correlacionados con DPPH (r = 0,72) y los radicales ABTS.+ (r= 0,76). Entre las bacterias ensayadas, S. aureus y, en menor grado B. subtilis mostraron la mayor sensibilidad; el MIC varió de 0,6 a 1,6 mg·mL-1 y 1,2 a 1,8 mg·mL-1 respectivamente. Los resultados muestran que los aceites de oliva argelinos pueden constituir una buena fuente de antioxidantes y agentes antimicrobianos