Journal
FOOD CHEMISTRY
Volume 269, Issue -, Pages 111-117Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2018.06.147
Keywords
Apple pulp extract; Natural phenolics; 5-hydroxymaltol; Antioxidant activity
Funding
- Cankiri Karatekin University [BAP: FF011015L32]
- State Planning Organization [DPT: 2010K120720]
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Apple pulps (AP) were obtained as a side product in fruit juice factories and contains valuable phenolic compounds. The dried AP was subjected to extraction with water, ethyl acetate (APEA) and n-butanol (APBU), respectively. 5-Hydroxymaltol (5-HM) was isolated and confirmed by NMR techniques. The HPLC-TOF/MS analysis revealed the presence of 16 components including major components of morine, gentisic, 4-hydroxybenzoic, vanillic and fumaric acid. The antioxidant activities were evaluated with total antioxidant activity, reducing power, inhibition of lipid peroxidation, metal chelating, free radical and H2O2 scavenging activities. 5-HM, APEA and APBU exhibited the in vitro antioxidant activities in a concentration-dependent and moderate manner. The IC50 values were effective for free radical scavenging activity of 5-HM (8.22 mu g mL(-1)), H2O2 scavenging activity for APEA (8.12 mu g mL(-1)) and inhibition of lipid peroxidation for APEA (0.93 mu g mL(-1)). The 5-HM and APEA have antioxidant capacities and also feasible to apply variety in vivo tests.
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