Plasma applications for the treatment of bean sprouts: safety, quality and nutritional assessments under aqueous and gaseous set-ups

Martina Darmanin ◽  
Antje Fröhling ◽  
Sara Bußler ◽  
Julia Durek ◽  
Susanne Neugart ◽  

Abstract Sprouts are particularly prone to microbial contamination due to their high nutrient content and the warm temperatures and humid conditions needed for their production. Therefore, disinfection is a crucial step in food processing as a means of preventing the transmission of bacterial, parasitic and viral pathogens. In this study, a dielectric coplanar surface barrier discharge (DCSBD) system was used for the application of cold atmospheric plasma (CAP), plasma activated water (PAW) and their combination on mung bean seeds. Overall, it was found that the combined seed treatment with direct air CAP (350 W) and air PAW had no negative impact on mung bean seed germination and growth, nor the concentration of secondary metabolites within the sprouts. These treatments also reduced the total microbial population in sprouts by 2.5 log CFU/g. This research reports for first time that aside from the stimulatory effect of plasma discharge on seed surface disinfection, sustained plasma treatment through irrigation of treated seeds with PAW can significantly enhance seedling growth. The positive outcome and further applications of different forms, of plasma i.e., gaseous and aqueous, in the agro-food industry is further supported by this research.

Molecules ◽  
2021 ◽  
Vol 26 (4) ◽  
pp. 910
Zlata Kelar Tučeková ◽  
Lukáš Vacek ◽  
Richard Krumpolec ◽  
Jakub Kelar ◽  
Miroslav Zemánek ◽  

The plasma-activated gas is capable of decontaminating surfaces of different materials in remote distances. The effect of plasma-activated water vapor on Staphylococcus epidermidis, methicillin-resistant Staphylococcus aureus, Pseudomonas aeruginosa, and Escherichia coli biofilm contamination was investigated on the polypropylene nonwoven textile surface. The robust and technically simple multi-hollow surface dielectric barrier discharge was used as a low-temperature atmospheric plasma source to activate the water-based medium. The germicidal efficiency of short and long-time exposure to plasma-activated water vapor was evaluated by standard microbiological cultivation and fluorescence analysis using a fluorescence multiwell plate reader. The test was repeated in different distances of the contaminated polypropylene nonwoven sample from the surface of the plasma source. The detection of reactive species in plasma-activated gas flow and condensed activated vapor, and thermal and electrical properties of the used plasma source, were measured. The bacterial biofilm decontamination efficiency increased with the exposure time and the plasma source power input. The log reduction of viable biofilm units decreased with the increasing distance from the dielectric surface.

2018 ◽  
Vol 20 (23) ◽  
pp. 5276-5284 ◽  
Renwu Zhou ◽  
Rusen Zhou ◽  
Karthika Prasad ◽  
Zhi Fang ◽  
Robert Speight ◽  

Here the possibility of plasma-activated water being a green disinfectant, whose bioactivity is closely linked to peroxynitrite generation, was demonstrated.

1962 ◽  
Vol 237 (2) ◽  
pp. 506-511 ◽  
Shan-ching Sung ◽  
M. Laskowski

1966 ◽  
Vol 241 (12) ◽  
pp. 2876-2880 ◽  
Hubert S. Loring ◽  
J.E. McLennan ◽  
Tom L. Walters

2013 ◽  
Vol 11 (4) ◽  
pp. 318-323 ◽  
Yu-Wei Luo ◽  
Wei-Hua Xie ◽  
Xiao-Xiao Jin ◽  
Qian Wang ◽  
Xue-Ming Zai

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