Hazra T, Sindhav R, Sudheendra CVK, Bumbadiya M, Govani R, Ramani V. A comparative study on the effects of boiling and ultrasonication on radical scavenging activity, casein particle size, and whiteness of milk.
Vet World 2021;
14:1784-1787. [PMID:
34475698 PMCID:
PMC8404115 DOI:
10.14202/vetworld.2021.1784-1787]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Accepted: 06/02/2021] [Indexed: 11/16/2022] Open
Abstract
Background and Aim
Different processing treatments affect the functional properties of milk. This study aimed to evaluate the effects of boiling and ultrasonication on radical scavenging activity, micellar casein particle size, and the whiteness of milk.
Materials and Methods
Milk was subjected to boiling and ultrasonication treatments. Then, the micellar casein size and the whiteness of the milk were evaluated using L-Value- intensity of whiteness and the radical scavenging capacity of the milk was evaluated using 1,1-diphenyl-2-picrylhydrazyl method.
Results
The radical scavenging activity of the milk was found to be reduced during the different processing treatments, but this decrease was non-significant for the ultrasonication treatment (p>0.05). However, a significant reduction in radical scavenging activity (p<0.05) was observed for the boiled milk. Micellar casein size reduction was observed after both treatments, and boiling had a significant effect (p<0.05) on the micellar casein particle size. We found that the whiteness of skim milk was significantly decreased after boiling treatment, but was not significantly decreased after ultrasonication. Ultrasonication had a non-significant effect on the whiteness of ultrasonicated milk which was observed.
Conclusion
Ultrasonicated milk had a very non-significant effect on the antioxidant activity (radical scavenging activity) of milk, whereas the effect of boiling was significant. Ultrasonication treatment increases the shelf-life of milk while retaining its bioactive properties.
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