Comparative study on the effect of radio frequency and high-pressure pasteurization on the texture, water distribution, and rheological properties of Nostoc sphaeroides

Xu, J, Zhang, M and Adhikari, B 2018, 'Comparative study on the effect of radio frequency and high-pressure pasteurization on the texture, water distribution, and rheological properties of Nostoc sphaeroides', Journal of Applied Phycology, vol. 30, no. 2, pp. 1041-1048.


Document type: Journal Article
Collection: Journal Articles

Title Comparative study on the effect of radio frequency and high-pressure pasteurization on the texture, water distribution, and rheological properties of Nostoc sphaeroides
Author(s) Xu, J
Zhang, M
Adhikari, B
Year 2018
Journal name Journal of Applied Phycology
Volume number 30
Issue number 2
Start page 1041
End page 1048
Total pages 8
Publisher Springer Netherlands
Abstract Nostoc sphaeroides has been used as herbal medicine and dietary supplement in Asian countries from prehistoric times. When N. sphaeroides is pasteurized using conventional high-pressure (HP) steam (121 °C, 30 min), its natural texture and nutritional ingredients are negatively affected. This study investigated the effect of radio frequency (RF) heating on the degree of microbial kill, texture, water distribution, and rheological properties of N. sphaeroides and compared the effect of HP steam (121 °C, 30 min) pasteurization on these parameters. RF (6 kW, 27 MHz) pasteurization was carried out for 10, 20, and 30 min at 67 °C. The results showed that the RF heating carried out for 20 min achieved a 3 log reduction of bacteria which met the safety standard. The effects of RF pasteurization on the texture, water distribution, and rheological properties of N. sphaeroides were significantly lower than that in HP steam pasteurization. Therefore, the application of RF heating in N. sphaeroides would help broaden its application in food, health, and pharmaceutical formulations. © 2017, Springer Science+Business Media B.V.
Subject Environmental Biotechnology not elsewhere classified
Keyword(s) Cyanobacteria
Nostoc sphaeroides
RF heating
Rheological properties
Texture
Water distribution
DOI - identifier 10.1007/s10811-017-1325-x
Copyright notice © 2017, Springer Science+Business Media B.V.
ISSN 0921-8971
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