The equipment used herein was described by Niemira (2012b), with the following modifications. Briefly, a customized version of a Dyne-A-Mite HPAC plasmajet device (Enercon Corp., Menomonee Falls, Wis., USA) was used with an ionizing potential of 1 cm between2electrodestogenerateaplasmaarcwithinaTefloncowling