Factors involved in Bacillus spore's resistance to cold atmospheric pressure plasma
作者： Christian Hertwig , Kai Reineke , Cornelia Rauh , Oliver Schlüter
DOI: 10.1016/J.IFSET.2017.07.031
关键词: Dipicolinic acid 、 Bacillus subtilis 、 Ozone 、 Spore 、 Sterilization (microbiology) 、 Biology 、 Endospore 、 Microbiology 、 Bacillus atrophaeus 、 Food science 、 Atmospheric-pressure plasma
摘要: Abstract In this study factors involved in spore resistance to cold atmospheric pressure plasma (CAPP) were investigated. Therefore, wild-type Bacillus subtilis spores and isogenic mutant strains, PS578 lacking the genes encoding spore's two major small acid soluble proteins (SASPs), FB122 being unable synthesize dipicolinic (DPA) during sporulation PS3328 outer coat, CAPP treated using different process gasses (air, N2, O2, CO2). Obtained inactivation depended on gas; highest efficiency was obtained with N2-plasma. The results indicated that SASPs contribute general spores' resistance. DPA coat also important protection against UV photons, however, protective effect not so pronounced as for SASPs. Furthermore, they contributed generated ozone. atrophaeus spores, surrogate chemical irradiation sterilization, showed over all a lower tested CAPPs. Industrial relevance application of is an emerging low temperature technology bacterial surfaces, such food products well contact surfaces packing material. presented help understand mechanisms high CAPP. This knowledge could be useful optimize decontamination various industry.
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