Physico-chemical properties and DPPH-ABTS scavenging activity of some local pomegranate (Punica granatum) ecotypes

Int J Food Sci Nutr. 2009:60 Suppl 2:197-210. doi: 10.1080/09637480903067037.

Abstract

Peels and fresh pomegranate extracts were used in the present study for the determination of the physic-chemical properties and DPPH-ABTS scavenging activities. Total sugars of juice are fructose (ca. 7 g/100 ml) and glucose (ca. 8 g/100 ml). Contents of soluble proteins in juice extracts are about 7 g/l (Bradford assays) and 22% (Kjeldhal assays) from dry pulp. Minerals in peel and juice are respectively 9.43+/-0.93 and 9.46+/-1.05 mg/100 ml for posphorus and 210.86+/-10.70 and 271.94+/-60.59 mg/100 g for potassium. The sodium contents are nearly 7 mg/100 ml in both peel and juice. Highly antioxidant contents in peels were confirmed. Free radical scavenging is about 3.58+/-0.38 microg/ml in peel. The antioxidant capacity value determined by ABTS was 7.364+/-0.403 mM Trolox equivalent antioxidant capacity/100 g dry weight. These findings implied that bio-active compounds from the peel might be potential resources for the development of antioxidant function dietary food.

MeSH terms

  • Antioxidants / analysis
  • Antioxidants / pharmacology*
  • Benzothiazoles
  • Biphenyl Compounds / metabolism
  • Diet
  • Dietary Proteins / analysis
  • Dietary Sucrose / chemistry
  • Ecotype
  • Free Radical Scavengers / pharmacology
  • Fructose / analysis
  • Fruit / chemistry*
  • Glucose / analysis
  • Lythraceae / chemistry*
  • Lythraceae / classification
  • Minerals / analysis
  • Picrates / metabolism
  • Plant Extracts / chemistry
  • Plant Extracts / pharmacology*
  • Species Specificity
  • Sulfonic Acids / metabolism
  • Thiazoles / metabolism
  • Trace Elements / analysis

Substances

  • Antioxidants
  • Benzothiazoles
  • Biphenyl Compounds
  • Dietary Proteins
  • Dietary Sucrose
  • Free Radical Scavengers
  • Minerals
  • Picrates
  • Plant Extracts
  • Sulfonic Acids
  • Thiazoles
  • Trace Elements
  • 2,2'-azino-di-(3-ethylbenzothiazoline)-6-sulfonic acid
  • Fructose
  • 1,1-diphenyl-2-picrylhydrazyl
  • Glucose