Records of Agricultural and Food Chemistry

A scientific open access journal in the field of agricultural and food chemistry.
Editor-in-Chief: Mehmet Öztürk
Co-Editor-in-Chief: Turgut Kılıç
Editor: Food Science and Technology: Murat Taşan
Editor (Book Review and Review Article) : Ahmet C Goren

LATEST ARTICLES

Original Article

Evaluation of Radical Scavenging and Metal Chelating Potential of Cameroonian Propolis and Isolation of Some Chemical Constituents

Rec. Agr. Food. Chem. (2022) in press ; 1 - 10
by Mathieu Sawalda , Tamfu Alfred Ngenge , Fadimatou , Cadet François Essongue , Emmanuel Talla , Henoumont Céline , Laurent Sophie , Farzana Shaheen and Joseph Tanyi Mbafor

Five extracts were prepared from different propolis samples and denoted PR1-PR5. They were subjected to two complementary antioxidant assays, DPPH radical scavenging and metal chelation. The propolis extracts PR4 and PR5 showed good radical scavenging power with IC50 20.45 ± 1.65 μg/mL and 17.23 ± 1.40 μg/mL respectively as well as appreciable chelating power of IC50 7.52± 0.61 µg/mL and 3.47± 0.61 µg/mL for PR4 and PR5 respectively. The PR1 extract showed a moderate radical scavenging activity with an IC50 = 230.08 ± 18.60 μg/mL and exhibited a high chelating power with an IC50 of 17.40 ± 1.41 μg /mL. This potent antioxidant effects of the propolis indicates its possible application in food science. Some compounds were isolated and characterized by 1D-, 2D-NMR studies as 7-O-ß–glucopyranosylapigenine, fridelin, lupeol, β-sitosterol, 3'-hydroxypentyltetratretracontanoate, 3'-hydroxybutyltetracontanoate, propylhexatetracontanoate, methyl-tetratretraconta-noate, 1′-O-eicosanylglycerol, and 2',3'-dihydroxypropyltetraeicosanoate which was further acetylated through hemi-synthesis to yield 2',3'-diacetylpropyltetraeicosanoate.

DOI
http://doi.org/10.25135/rafc.11.2206.2487
Keywords
Propolis radical scavenging metal chelation acetylation 2,3-diacetylpropyltetraeicosanoate
Available online: August 23, 2022
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