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

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.

Protective Effects of Combined Selenium and Punica granatum Treatment on Some Inflammatory and Oxidative Stress Markers in Arsenic-Induced Hepatotoxicity in Rats

“…These results can be explained by the fact that antioxidant treatment induced Nrf2 pathway which regulates the transcription of cytoprotective and anti-oxidant genes, including TrxR enzyme, and results in general increase in TAC [38]. These results were in line with Elfalleh et al [39], who reported positive linear correlation between TAC and P. granatum phenolics.…”

The Therapeutic Potential of Pomegranate and Its Products for Prevention of Cancer

“…All authors reported considerable variation in some of the chemical composition profile (lipids, phenols, organic acids, vitamins, sugars) and antioxidant properties of pomegranate samples, independent on the antioxidant method performed. The antioxidant activity of pomegranate and its products was almost determined via in vitro trials and several methods could be used for its determination, however, pomegranate showed an antioxidant activity, independent on the antioxidant test assayed and generally with significant linear correlation between phenolic content and antioxidant capacity (Elfalleh et al, 2009). Seeram et al (2005) stated that the antioxidant level in pomegranate juice was higher than found in other fruit juices, such as blueberry, cranberry, and orange.…”

Study of Agronomical and Technological Quality Characteristics of Some Special Egyptian Rice Varieties

“…Total phenols were estimated by the FolinCiocalteu method reported in Elfalleh et al (2009).The amount of total flavonoids was measured spectrophotometrically by the method of Nasri et al (2011). The DPPH (2,2 diphenyl-1-picric hydrazyl) radical scavenging activity of methanolic extracts was determined according the method reported by Okonogi et al (2007).…”