Influence of seasonal variation on antioxidant and total phenol activity of red propolis extracts

Abstract

Recently there has been a growing interest in the discovery of antioxidant substances for use in food and medicinal products, as substitutes for synthetic antioxidant substances. Propolis has been the object of pharmacological studies due to its biological activity amongst antioxidant properties. In this work, the seasonal influence on antioxidant activity and total phenol content of red propolis ethanolic extracts was evaluated, as well as the established correlation between them, the antioxidant capacity being evaluated by different methods (DPPH, H 2 O 2 and total antioxidant activity). The results have demonstrated that the red propolis analyzed possesses antioxidant activity, as demonstrated by the methods used.

Evaluation of seasonal antioxidant activity and total phenolic compounds in stems and leaves of some almond (Prunus amygdalus L.) varieties

“…Nunes et al [ 24 ] carried out a study in red propolis and investigated the effect of season on antioxidant activity and total phenols. The researchers reported that there was a correlation between total antioxidant activity and season and that phenol content was high in hydra-alcoholic (90%) concentration in October.…”

Investigating the antioxidant and anticytotoxic activities of propolis collected from five regions of Indonesia and their abilities to induce apoptosis

“…For the last 40 years, many studies have focused on the chemical composition, biological activity, pharma-cological, and therapeutical uses of propolis (Khismatullina,2005). Nunes et al (2013) stated that the composition of the propolis depends on the season, the vegetation, and the area of collection. Fernandes- Silva et al (2013) also stated that the chemical composition of propolis depends on the plant or plants from which the resin is collected and, consequently, on the geographic location of the hive.…”

Biophysical Studies of Some Bee Products as Radioprotectors

“…Using natural products as radioprotectors has several benefits since they are safe with proven therapeutic advantages. The body endogenous defensive system is supported by natural antioxidant compounds provided from nourishment (Nunes et al 2013). Identification and isolation of antioxidants from natural sources has become an active field of research.…”