TY - JOUR
T1 - Application of ultraviolet radiation and ultrasound treatments for Alicyclobacillus acidoterrestris spores inactivation in apple juice
AU - Tremarin, Andréia
AU - Brandão, Teresa R. S.
AU - Silva, Cristina L. M.
N1 - Funding Information:
Andréia Tremarin gratefully acknowledges to CAPES-Brazil the financial support through the Post-Doctoral grant 11761/13-0. Teresa R.S. Brandão gratefully acknowledges to Fundação para a Ciência e a Tecnologia and Fundo Social Europeu (FSE) the financial support through the Post-Doctoral grant SFRH/BPD/101179/2014. This work was supported by National Funds from FCT - Fundação para a Ciência e a Tecnologia through project UID/Multi/50016/2013. The authors gratefully acknowledge the collaboration of Emine Aşik in this research.
Publisher Copyright:
© 2016 Elsevier Ltd
PY - 2017/5/1
Y1 - 2017/5/1
N2 - 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.
AB - 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.
KW - A. acidoterrestris
KW - Apple juices
KW - Inactivation
KW - Ultrasound and UV-C treatments
UR - http://www.scopus.com/inward/record.url?scp=85007174586&partnerID=8YFLogxK
U2 - 10.1016/j.lwt.2016.12.039
DO - 10.1016/j.lwt.2016.12.039
M3 - Article
AN - SCOPUS:85007174586
SN - 0023-6438
VL - 78
SP - 138
EP - 142
JO - LWT - Food Science and Technology
JF - LWT - Food Science and Technology
ER -