University of Khartoum

Chemical Composition and Antioxidant Capacity of Sudanese Propolis

Chemical Composition and Antioxidant Capacity of Sudanese Propolis

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Title: Chemical Composition and Antioxidant Capacity of Sudanese Propolis
Author: Mohammed, Ebtisam Ahmed Abubaker
Abstract: The objective of this work was to study the chemical composition, minerals profile and antioxidant capacity of two samples of propolis obtained from White Nile and West Darfur States. The samples were analyzed for their content of moisture, ash, fiber, fat, protein, minerals (Na, Ca, K, Mg, Fe, Cu, Zn and Mn), total phenols, total flavonoids, total reducing ability, chelation of Fe+2 ion and scavenging of H2O2. The results showed that the two samples contained significantly (P≤0.05) different amounts of moisture, ash, fiber, fat, protein and carbohydrates. The major minerals varied between the two samples and the highest value was recorded for Mg+ (262.1mg/100g) in Darfur sample and Na+ had the lowest value (28-32mg/100g). Trace minerals were not detected except iron (0.6 and 0.5mg/100g for White Nile and Darfur samples, respectively). Regarding the levels of antioxidants, the results revealed that the two samples contained significantly (P≤0.05) different amounts of total polyphenols and total flavonoids, ranging between 1007 and 1113mg/100g for Darfur and between 75.2 and 82.08mg/100g for the White Nile samples. On the other hand, total reducing ability was within the range of 3.79-36.53mM/ml, chelation of Fe+2ion was 8.73%-43.25% and scavenging of H2O2 was 60.37%-92.68%. The results indicated that the White Nile sample was superior in total reducing ability and scavenging of H2O2, while theDarfur sample was better in chelation of Fe+2.ion.
Description: 86 Pages
URI: http://khartoumspace.uofk.edu/123456789/17047
Date: 2015-11-12


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