Identifying The Natural Antioxidants and Total Phenols of Some Date Varieties in Saudi Arabia

Olfat M. Nassar¹, Mohamed A. Amin², Mohamed E. Hassan^{3, 4}and Heba Ali Nasr⁵

¹Department of Home Economics (Nutrition), Faculty of Science and Arts, Northern Border University (Rafha), Saudi Arabia. ²Department of Botany and Microbiology, Faculty of Science, Al-Azhar University, Cairo, Egypt. ³Center of Excellence, advanced material & Nanobiotechnology Group, National Research Centre, 12622 Dokki, Giza, Egypt. ⁴Chemistry of Natural and Microbial Products Department, National Research Centre, 12622 Dokki, Giza, Egypt. ⁵Department of Biology, Faculty of Science and Arts, Northern Border University (Rafha), Saudi Arabia.

Corresponding Author E-mail: mohassan81@gmail.com

DOI : http://dx.doi.org/10.13005/bbra/2108

ABSTRACT: Phoenix dactylifera L. (date palm) is well known for its innumerable health benefits and nutritional values. Therefore, the present work aimed to determine the total phenolic content in five date palm fruit varieties, Barhi, Barni Al Madina, Khesab, Sukkary and  Ajwa, collected from different regions of Saudi Arabia , extracted with aqueous method and to evaluate in vitro their antioxidative properties by DPPH^• method. Consequently, the total polyphenol contents of these extracts will be measured using Folin Ciocalteu spectrophotometric method. Total phenolic content ranged from 57.8 and 55.2 mg of gallic acid equivalent /30 g fresh wt. and the antioxidant activity was ranging from a low value of 29.2 in Sukkary cultivar to a high value of 31.8 in Barni Al Madina cultivar. Also the best carrier for encapsulation of date Palme extracts is CMC comparing with alginate and carrageenan.

KEYWORDS: Phoenix dactylifera,Encapsulation,total phenolic content,antioxidant activity

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