Disinfection of wheat grains contaminated with Penicillium oxalicum spores by a supercritical carbon dioxide-water cosolvent system

Hyong Seok Park; Yong Ho Lee; Wook Kim; Hee Jung Choi; Kyoung Heon Kim

doi:10.1016/j.ijfoodmicro.2012.03.032

Disinfection of wheat grains contaminated with Penicillium oxalicum spores by a supercritical carbon dioxide-water cosolvent system

Hyong Seok Park, Yong Ho Lee, Wook Kim, Hee Jung Choi, Kyoung Heon Kim

Department of Internal Medicine

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

18 Scopus citations

Abstract

Spores of the plant pathogenic fungus Penicillium oxalicum inoculated onto wheat grains were inactivated using supercritical carbon dioxide (SC-CO ₂). After the SC-CO ₂ treatment at various conditions of temperature, time and amount of water cosolvent, the colony forming units (CFU) of fungal spores on wheat grains and the germination yields of wheat grains were determined. Among these SC-CO ₂ treatment parameters, the inactivation of P. oxalicum spores was found to be significantly increased by adding water cosolvent. The optimal conditions determined by ridge analysis of response surface methodology were 233μL water, 44°C, and 11min, which resulted in a 6.41 log ₁₀ CFU reduction of P. oxalicum. However, the germination yields of wheat grains significantly decreased when water cosolvent of 150 or 300μL was added to the grains contained in the 100mL SC-CO ₂ treatment vessel.

Original language	English
Pages (from-to)	239-244
Number of pages	6
Journal	International Journal of Food Microbiology
Volume	156
Issue number	3
DOIs	https://doi.org/10.1016/j.ijfoodmicro.2012.03.032
State	Published - 1 Jun 2012

Bibliographical note

Funding Information:
This work was supported by grants from the Korea Research Foundation ( KRF-2009-013-D00038 ) and the Advanced Biomass R&D Center of Korea ( 2011-0031353 ). Facility support at Korea University Food Safety Hall for the Institute of Biomedical Science and Food Safety is also acknowledged.

Keywords

Decontamination
Fungal spore
Germination
Grains
Penicillium
Supercritical carbon dioxide

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10.1016/j.ijfoodmicro.2012.03.032

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title = "Disinfection of wheat grains contaminated with Penicillium oxalicum spores by a supercritical carbon dioxide-water cosolvent system",

abstract = "Spores of the plant pathogenic fungus Penicillium oxalicum inoculated onto wheat grains were inactivated using supercritical carbon dioxide (SC-CO 2). After the SC-CO 2 treatment at various conditions of temperature, time and amount of water cosolvent, the colony forming units (CFU) of fungal spores on wheat grains and the germination yields of wheat grains were determined. Among these SC-CO 2 treatment parameters, the inactivation of P. oxalicum spores was found to be significantly increased by adding water cosolvent. The optimal conditions determined by ridge analysis of response surface methodology were 233μL water, 44°C, and 11min, which resulted in a 6.41 log 10 CFU reduction of P. oxalicum. However, the germination yields of wheat grains significantly decreased when water cosolvent of 150 or 300μL was added to the grains contained in the 100mL SC-CO 2 treatment vessel.",

keywords = "Decontamination, Fungal spore, Germination, Grains, Penicillium, Supercritical carbon dioxide",

author = "Park, {Hyong Seok} and Lee, {Yong Ho} and Wook Kim and Choi, {Hee Jung} and Kim, {Kyoung Heon}",

note = "Funding Information: This work was supported by grants from the Korea Research Foundation ( KRF-2009-013-D00038 ) and the Advanced Biomass R&D Center of Korea ( 2011-0031353 ). Facility support at Korea University Food Safety Hall for the Institute of Biomedical Science and Food Safety is also acknowledged.",

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doi = "10.1016/j.ijfoodmicro.2012.03.032",

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AU - Kim, Wook

AU - Choi, Hee Jung

AU - Kim, Kyoung Heon

N1 - Funding Information: This work was supported by grants from the Korea Research Foundation ( KRF-2009-013-D00038 ) and the Advanced Biomass R&D Center of Korea ( 2011-0031353 ). Facility support at Korea University Food Safety Hall for the Institute of Biomedical Science and Food Safety is also acknowledged.

PY - 2012/6/1

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N2 - Spores of the plant pathogenic fungus Penicillium oxalicum inoculated onto wheat grains were inactivated using supercritical carbon dioxide (SC-CO 2). After the SC-CO 2 treatment at various conditions of temperature, time and amount of water cosolvent, the colony forming units (CFU) of fungal spores on wheat grains and the germination yields of wheat grains were determined. Among these SC-CO 2 treatment parameters, the inactivation of P. oxalicum spores was found to be significantly increased by adding water cosolvent. The optimal conditions determined by ridge analysis of response surface methodology were 233μL water, 44°C, and 11min, which resulted in a 6.41 log 10 CFU reduction of P. oxalicum. However, the germination yields of wheat grains significantly decreased when water cosolvent of 150 or 300μL was added to the grains contained in the 100mL SC-CO 2 treatment vessel.

AB - Spores of the plant pathogenic fungus Penicillium oxalicum inoculated onto wheat grains were inactivated using supercritical carbon dioxide (SC-CO 2). After the SC-CO 2 treatment at various conditions of temperature, time and amount of water cosolvent, the colony forming units (CFU) of fungal spores on wheat grains and the germination yields of wheat grains were determined. Among these SC-CO 2 treatment parameters, the inactivation of P. oxalicum spores was found to be significantly increased by adding water cosolvent. The optimal conditions determined by ridge analysis of response surface methodology were 233μL water, 44°C, and 11min, which resulted in a 6.41 log 10 CFU reduction of P. oxalicum. However, the germination yields of wheat grains significantly decreased when water cosolvent of 150 or 300μL was added to the grains contained in the 100mL SC-CO 2 treatment vessel.

KW - Decontamination

KW - Fungal spore

KW - Germination

KW - Grains

KW - Penicillium

KW - Supercritical carbon dioxide

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ER -

Disinfection of wheat grains contaminated with Penicillium oxalicum spores by a supercritical carbon dioxide-water cosolvent system

Abstract

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Keywords

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