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Advisor(s)
Abstract(s)
Alicyclobacillus acidoterrestris is a spore-forming bacterium, which is responsible for quality degradation of fruit juices. Non-thermal treatments, such as ultraviolet-C radiation (UV-C) and ultrasound (US), are promising methods for microbial inactivation. The main objective was to study the influence of UV-C, ultrasound and combinations of both treatments on A. acidoterrestris spores inactivation in apple juices. A thermal treatment at 95 °C was used as control. Commercial juices artificially inoculated with the bacterium were exposed to the treatments. Results showed that ultrasound had the lowest impact on A. acidoterrestris inactivation. When UV-C radiation was applied, the number of spores decreased drastically after 8 min, being more effective than a 95 °C thermal treatment. In terms of final microbial loads, combination of US and UV-C did not result in synergetic effects. However, inactivation rates of the combined treatments were significantly different from the ones obtained when the treatments were applied individually.
Description
Keywords
Ultrasound and UV-C treatments Apple juices A. acidoterrestris Inactivation
Citation
Tremarin, A., Brandão, T. R. S., & Silva, C. L. M. (2017). Application of ultraviolet radiation and ultrasound treatments for alicyclobacillus acidoterrestris spores inactivation in apple juice. Lwt-Food Science and Technology, 78, 138-142
Publisher
Elsevier