Black pepper powder microbiological quality improvement using DBD systems in atmospheric pressure Maciej Grabowski, Marcin Hołub, Michał Balcerak, Stanisław Kalisiak and Waldemar Dąbrowski Eur. Phys. J. Appl. Phys., 71 2 (2015) 20811 Published online: 15 July 2015 DOI: 10.1051/epjap/2015140487