Modification of bacterial structures by a low-temperature gas plasma and influence on packaging material

Journal of Applied Microbiology
P MuranyiH-C Langowski

Abstract

To investigate the effect of a cascaded dielectric barrier discharge (CDBD) treatment on the biological structure of a selected bacterium and on the properties of different polymer films. Inactivation kinetics were measured using air as the process gas and using Bacillus atrophaeus spores and vegetative cells, which had been homogeneously distributed on a surface. The changes to the outer coats and the DNA of the endospores and cells after plasma treatment were determined using biomolecular and chemical methods. The experiments showed that damage to the DNA molecules and changes in the cell walls can be observed as a consequence of the CDBD treatment. Furthermore, the influence of the plasma treatment on the properties of various polymer films was investigated using a variety of test methods. Except the sealing strength where a slight decrease was observed (max. 20%), no negative changes of the material properties have occurred. CDBD treatment can affect the DNA of spores and cells, depending on the treatment time. At the same time, practically relevant inactivation rates on packaging materials were observed, without any significant changes to the material properties. Knowledge about CDBD mechanisms was acquired from a biologic...Continue Reading

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Oct 23, 2008·Journal of Food Protection·Michael DeilmannPeter Awakowicz

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Citations

May 16, 2012·Journal of Industrial Microbiology & Biotechnology·Tim MaischJulia L Zimmermann
Jan 11, 2012·Antimicrobial Agents and Chemotherapy·Erik KvamAllen L Garner
Nov 26, 2015·Journal of Food Science and Technology·Hyun-Joo KimCheorun Jo
Jan 18, 2015·Biotechnology Advances·Vladimir ScholtzJaroslav Julak
Apr 6, 2018·Critical Reviews in Food Science and Nutrition·Xinyu LiaoTian Ding
Jul 18, 2020·Foods·Paulo E S MunekataJosé M Lorenzo
Dec 15, 2020·Food Science & Nutrition·Shahrbanoo Ahmadi LedariFarshad Sohbatzadeh Lanbar

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