Total phenols and antioxidant activities of natural honeys and propolis collected from different geographical regions of Ethiopia
| Autor: | D. Sime, M. Atlabachew, M. R. Abshiro, T. Zewde |
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| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Bulletin of the Chemical Society of Ethiopia, Vol 29, Iss 2, Pp 163-172 (2015) |
| Druh dokumentu: | article |
| ISSN: | 1011-3924 1726-801X |
| DOI: | 10.4314/bcse.v29i2.1 |
| Popis: | In this study, ten honey and five propolis samples from different geographical origins were tested. Both honey and propolis samples showed high content of total phenolic compounds (330-610 mg gallic acid equivalent (GAE)/100 g honey; 365-1022 mg GAE/g ethanol extract of propolis (EEP). The total flavonoids ranged from (15.1-42.6 mg catechin equivalent (CE)/100 g for honey; to 123-74 mg CE/g for EEP. These honeybee products of Ethiopia had high total radical scavenging properties with respect to 2,2-diphenyl-1-picryl-hydrazyl (DPPH); 18.1-59.8% and 48.6-87.8% for honey and EEP respectively. Furthermore, the hydroxymethylfurfural (HMF) of the honey samples was found to be low with a mean value of 4.8 mg/kg suggesting that the samples were of good quality. The antioxidant properties of the products showed a good correlation (r2 = 0.50-0.82) with their polyphenolic contents. |
| Databáze: | Directory of Open Access Journals |
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