Journal
AGRONOMY-BASEL
Volume 12, Issue 5, Pages -Publisher
MDPI
DOI: 10.3390/agronomy12051102
Keywords
endocarp; mesocarp; natural antioxidants; radical scavenging activity; ultrasound-assisted extraction
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Funding
- Directorate General of Higher Education (DIKTI), Ministry of Research, Technology and Higher Education of the Republic of Indonesia [6/E1/KP.PTNBH/2021, 2354/UN1/DITLIT/DIT-LIT/PT/2021]
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This study assessed the functionality of coconut by-products at early and mature stages and found that extracts from young coconut mesocarp exhibited high antioxidant activity, making them a potential alternative natural antioxidant.
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 (endoand 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-beta-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 mu g mL(-1)) than butylhydroxytoluene (BHT, 170 mu g mL(-1)). Based on the linoleic acid-beta-carotene system assay, the extract exhibited a higher antioxidant activity (1.25 x) than tertiary butylhydroquinone (TBHQ, 200 mu g mL(-1)); and comparable with butylhydroxyanisole (BHA, 250 mu g mL(-1)). Therefore, extracts of coconut by-products, particularly the young mesocarp, can be an alternative natural antioxidant.
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