Effects of intense pulsed light and gamma irradiation on Bacillus cereus spores in mesquite pod flour

Dongjie Chen; Wes Mosher; Justin Wiertzema; Peng Peng; Min Min; Yanling Cheng; Jun An; Yiwei Ma; Xuetong Fan; Brendan A. Niemira; David J. Baumler; Chi Chen; Paul Chen; Roger Ruan Chen

doi:10.1016/j.foodchem.2020.128675

Effects of intense pulsed light and gamma irradiation on Bacillus cereus spores in mesquite pod flour

Dongjie Chen, Wes Mosher, Justin Wiertzema, Peng Peng, Min Min, Yanling Cheng, Jun An, Yiwei Ma, Xuetong Fan, Brendan A. Niemira, David J. Baumler, Chi Chen, Paul Chen, Roger Ruan Chen

Research output: Contribution to journal › Article › peer-review

Abstract

This study was conducted to evaluate the inactivation of Bacillus cereus spore in mesquite flour with intense pulsed light (IPL) and gamma radiation. The physical, chemical, and toxicity of treated mesquite flour were also investigated. The results showed that up to 3.51 log₁₀CFU/g B. cereus spore inactivation was achieved with 8 kGy of gamma radiation, and up to 1.69 log₁₀CFU/g reductions could be achieved after 28s of catalytic IPL exposure. Although chemometric analysis showed 9-hydroxy-10,12-octadecadienoic acid was slightly increased after a 28s-catalytic IPL treatment, the concentration is within the acceptable range. No significant increase in acetic or propionic acids (typical off-flavor volatile compounds) was observed after either treatment. For cytotoxicity, the Caco-2 cell viability analysis revealed that these two technologies did not induce significant cytotoxicity to the treated mesquite flour. Overall, these two technologies exhibit strong potential for the decontamination of B. cereus in mesquite flour.

Original language	English (US)
Article number	128675
Journal	Food Chemistry
Volume	344
DOIs	https://doi.org/10.1016/j.foodchem.2020.128675
State	Accepted/In press - 2020

Bibliographical note

Funding Information:
This work is supported by the Enhancing Food Safety through Improved Processing Technologies Program [grant no. 2016-68003-24850] from the USDA National Institute of Food and Agriculture.

Keywords

Bacillus cereus spores
Gamma radiation
Intense pulsed light
Mesquite flour

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Effects of intense pulsed light and gamma irradiation on Bacillus cereus spores in mesquite pod flour. / Chen, Dongjie; Mosher, Wes; Wiertzema, Justin; Peng, Peng; Min, Min ; Cheng, Yanling; An, Jun; Ma, Yiwei; Fan, Xuetong; Niemira, Brendan A.; Baumler, David J.; Chen, Chi ; Chen, Paul; Ruan Chen, Roger.

In: Food Chemistry, Vol. 344, 128675, 15.05.2021.

Research output: Contribution to journal › Article › peer-review

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title = "Effects of intense pulsed light and gamma irradiation on Bacillus cereus spores in mesquite pod flour",

abstract = "This study was conducted to evaluate the inactivation of Bacillus cereus spore in mesquite flour with intense pulsed light (IPL) and gamma radiation. The physical, chemical, and toxicity of treated mesquite flour were also investigated. The results showed that up to 3.51 log10CFU/g B. cereus spore inactivation was achieved with 8 kGy of gamma radiation, and up to 1.69 log10CFU/g reductions could be achieved after 28s of catalytic IPL exposure. Although chemometric analysis showed 9-hydroxy-10,12-octadecadienoic acid was slightly increased after a 28s-catalytic IPL treatment, the concentration is within the acceptable range. No significant increase in acetic or propionic acids (typical off-flavor volatile compounds) was observed after either treatment. For cytotoxicity, the Caco-2 cell viability analysis revealed that these two technologies did not induce significant cytotoxicity to the treated mesquite flour. Overall, these two technologies exhibit strong potential for the decontamination of B. cereus in mesquite flour.",

keywords = "Bacillus cereus spores, Gamma radiation, Intense pulsed light, Mesquite flour",

author = "Dongjie Chen and Wes Mosher and Justin Wiertzema and Peng Peng and Min Min and Yanling Cheng and Jun An and Yiwei Ma and Xuetong Fan and Niemira, {Brendan A.} and Baumler, {David J.} and Chi Chen and Paul Chen and {Ruan Chen}, Roger",

note = "Funding Information: This work is supported by the Enhancing Food Safety through Improved Processing Technologies Program [grant no. 2016-68003-24850] from the USDA National Institute of Food and Agriculture. ",

year = "2020",

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AU - Chen, Dongjie

AU - Mosher, Wes

AU - Wiertzema, Justin

AU - Peng, Peng

AU - Min, Min

AU - Cheng, Yanling

AU - An, Jun

AU - Ma, Yiwei

AU - Fan, Xuetong

AU - Niemira, Brendan A.

AU - Baumler, David J.

AU - Chen, Chi

AU - Chen, Paul

AU - Ruan Chen, Roger

N1 - Funding Information: This work is supported by the Enhancing Food Safety through Improved Processing Technologies Program [grant no. 2016-68003-24850] from the USDA National Institute of Food and Agriculture.

PY - 2020

Y1 - 2020

N2 - This study was conducted to evaluate the inactivation of Bacillus cereus spore in mesquite flour with intense pulsed light (IPL) and gamma radiation. The physical, chemical, and toxicity of treated mesquite flour were also investigated. The results showed that up to 3.51 log10CFU/g B. cereus spore inactivation was achieved with 8 kGy of gamma radiation, and up to 1.69 log10CFU/g reductions could be achieved after 28s of catalytic IPL exposure. Although chemometric analysis showed 9-hydroxy-10,12-octadecadienoic acid was slightly increased after a 28s-catalytic IPL treatment, the concentration is within the acceptable range. No significant increase in acetic or propionic acids (typical off-flavor volatile compounds) was observed after either treatment. For cytotoxicity, the Caco-2 cell viability analysis revealed that these two technologies did not induce significant cytotoxicity to the treated mesquite flour. Overall, these two technologies exhibit strong potential for the decontamination of B. cereus in mesquite flour.

AB - This study was conducted to evaluate the inactivation of Bacillus cereus spore in mesquite flour with intense pulsed light (IPL) and gamma radiation. The physical, chemical, and toxicity of treated mesquite flour were also investigated. The results showed that up to 3.51 log10CFU/g B. cereus spore inactivation was achieved with 8 kGy of gamma radiation, and up to 1.69 log10CFU/g reductions could be achieved after 28s of catalytic IPL exposure. Although chemometric analysis showed 9-hydroxy-10,12-octadecadienoic acid was slightly increased after a 28s-catalytic IPL treatment, the concentration is within the acceptable range. No significant increase in acetic or propionic acids (typical off-flavor volatile compounds) was observed after either treatment. For cytotoxicity, the Caco-2 cell viability analysis revealed that these two technologies did not induce significant cytotoxicity to the treated mesquite flour. Overall, these two technologies exhibit strong potential for the decontamination of B. cereus in mesquite flour.

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KW - Intense pulsed light

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