Binary ethanol-water solvents affect betalain contents and health-promoting properties of red Celosia argentea inflorescence extracts
Issued Date
2022-01-01
Resource Type
ISSN
19854668
eISSN
22317546
Scopus ID
2-s2.0-85125262495
Journal Title
International Food Research Journal
Volume
29
Issue
1
Start Page
67
End Page
77
Rights Holder(s)
SCOPUS
Bibliographic Citation
International Food Research Journal Vol.29 No.1 (2022) , 67-77
Suggested Citation
Thiyajai P. Binary ethanol-water solvents affect betalain contents and health-promoting properties of red Celosia argentea inflorescence extracts. International Food Research Journal Vol.29 No.1 (2022) , 67-77. 77. Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/87482
Title
Binary ethanol-water solvents affect betalain contents and health-promoting properties of red Celosia argentea inflorescence extracts
Author(s)
Author's Affiliation
Other Contributor(s)
Abstract
The present work aimed to compare the betalain profiles and contents in the red inflorescence of Celosia argentea extracts obtained using different ethanol-water ratios. The impact of betalain content on the health-promoting properties was also evaluated. Freeze-dried inflorescence powder was extracted three times with aqueous-ethanol (0, 20, 40, 60, and 80% (v/v) ethanol). The highest total betacyanin content was found in the 40 and 60% aqueous-ethanolic extracts. Total phenolic content and antioxidant activities of the extracts increased with increasing ethanol concentration. The antioxidant activities measured by oxygen radical absorbance capacity (ORAC) assay of the 60 and 80% aqueous-ethanolic extracts were significantly higher than that of ascorbic acid. The IC50 of α-glucosidase inhibitory activities of all extracts were comparable to that of acarbose. Phenolics were the major responsible compounds for antioxidant (r = 0.975, p < 0.01 by ORAC assay), α-amylase (r = -0.725, p < 0.01), and lipase (r = 0.607, p < 0.05) inhibitory activities, whilst betacyanins corresponded to α-glucosidase inhibitory activities (r = 0.627, p < 0.05). The 60% aqueous-ethanolic extract was superior to the others in terms of colour, phytochemical contents, and health-promoting activities. These extracts can be utilised as natural food colorant, functional ingredients, and nutraceuticals