Antioxidant Activity of Aqueous and Ethanolic Extracts of Coconut (Cocos nucifera) Fruit By-Products

Agronomy

Miguel Palma¹  Umar Santoso²  Widiastuti Setyaningsih²  Lulum Leliana²  Supriyadi² 

[1] Department of Analytical Chemistry, Faculty of Sciences, IVAGRO, University of Cadiz, Campus de Excelencia Internacional Agroalimentario (CeiA3), Campus del Rio San Pedro, 11510 Puerto Real, Cadiz, Spain;Department of Food and Agricultural Product Technology, Faculty of Agricultural Technology, Gadjah Mada University, Jalan Flora, Bulaksumur, Depok, Sleman, Yogyakarta 55284, Indonesia;

关键词: endocarp;    mesocarp;    natural antioxidants;    radical scavenging activity;    ultrasound-assisted extraction;   

DOI  :  10.3390/agronomy12051102

来源: DOAJ

【 摘 要 】

Coconut is widely used as a food source in producing countries, and during consumption, the waste that is generated needs to be reduced through by-products processing to ensure environmental sustainability. This study aimed to assess the functionality of by-products (endo- and mesocarp) of coconuts at early and mature stages. The aqueous and ethanolic (50 and 100% ethanol in water) extracts of coconut by-products were evaluated for the DPPH radical scavenging activity and subjected to linoleic acid-β-carotene system assay in contrast with synthetic antioxidants. Ultrasound-producing extract of young coconut mesocarp provided the highest antioxidant activity with a lower IC₅₀ value (117 µg mL⁻¹) than butylhydroxytoluene (BHT, 170 µg mL⁻¹). Based on the linoleic acid-β-carotene system assay, the extract exhibited a higher antioxidant activity (1.25×) than tertiary butylhydroquinone (TBHQ, 200 µg mL⁻¹); and comparable with butylhydroxyanisole (BHA, 250 µg mL⁻¹). Therefore, extracts of coconut by-products, particularly the young mesocarp, can be an alternative natural antioxidant.

【 授权许可】

Unknown