پديد آورندگان :
Elmasta M. نويسنده , Gülçin I. نويسنده , Iildak O. نويسنده , Küfrevioًlu OI. نويسنده , Ibaoًlu K. نويسنده , Aboul-Enein H.Y. نويسنده
چكيده لاتين :
Bay leaves (BL) (Laurus nobilis L., Family: Lauraceae) are traditionally used orally to treat the symptoms of gastrointestinal
problems, such as epigastric bloating, impaired digestion, eructation, and flatulence. In this study, lyophilized extracts (both water
and ethanol) of BL were studied for their antioxidant properties. The antioxidant activity, reducing power, free radical scavenging,
superoxide anion radical scavenging, hydrogen peroxide scavenging and metal chelating activities were evaluated to determine the
total antioxidant capacity of both BL extracts. Both extracts exhibited strong total antioxidant activity in linoleic acid emulsion.
Concentrations of 20, 40, and 60 ىg ml-1 showed 84.9, 95.7, 96.8, and 94.2, 97.7, and 98.6% inhibition of lipid peroxidation of
linoleic acid emulsion, for water and ethanol extracts, respectively. On the other hand, 60 ىg ml-1 of the standard antioxidants
butylated hydroxyianisole (BHA), butylated hydroxytoluene (BHT), and ل-tocopherol exhibited 96.6, 99.1, and 76.9% inhibition of
lipid peroxidation in linoleic acid emulsion, respectively. In addition, the both BL extracts had effective reducing power, DPPH· free
radical scavenging, superoxide anion radical scavenging, hydrogen peroxide scavenging and metal chelating activities at 20, 40, and
60 ىg ml-1. The total amount of phenolic compounds in each BL extract was determined as gallic acid equivalents.
