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A plasma jet enhanced oil-based drug, named plasma-activated oil (PAO) is produced in sunflower oil by a single-step, room temperature, energy-efficient, and environment-friendly dry plasma jet enabled process. Plasma jets with two different working gas combinations, argon + air and argon + O2, were generated, namely PAO (air) and PAO (O2), respectively. Several hours of plasma jet treatment substantially increased the hydrogen peroxide and carboxylic acid concentrations in the PAO. Although the electrophilic fatty acid nitroalkenes produced by nitric oxide and nitrite of the argon + air plasma jet increased the acid value of PAO (air), similar sterilization and wound healing effect suggest that PAO (air) and PAO (O2) have similar concentrations of hydrogen peroxide and carboxylic acid. PAO killed the common Gram-positive bacteria [methicillin-resistant staphylococcus aureus (MRSA) andMicrococcus luteus] and Gram-negative bacteria (Pseudomonas aeruginosaandEscherichia coli) efficiently. PAO accelerated the healing of infected wounds by 33%.
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Xu et al. (2019) studied this question.
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