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Cold air plasmas DC corona discharges of low power (∼0.2 W) have been demonstrated to decontaminate biofilm and bacterial spores on polypropylene plastic surfaces. The antimicrobial plasma effect was enhanced by electro-spraying of water (0.05 ml/min) through the active plasma1. In a higher power (∼2 W) transient spark discharge mode with an electro-spray of aqueous solutions with E. coli bacteria,...
Despite its expense and harmful side effects, chemotherapy remains a standard part of breast cancer treatment. Combining chemotherapy with ambient gas plasma offers a way to reduce the dose of chemotherapeutics without reducing treatment efficacy. Ambient gas plasmas are cytotoxic to cancer cells. In vitro plasma treatment of MCF7 breast cancer cells by indirect dielectric barrier discharge and subsequent...
Both ambient-condition air plasmas and UVA emissions at wavelengths near 360 nm have been shown to inactivate bacteria in aqueous solution. We have recently reported that in the case of relatively high-power plasma treatment (greater than 0.25 W/cm2), important aqueous-phase chemical species include nitrate (NO3−), nitrite (NO2−), and hydrogen peroxide (H2O2)1, 2 In this study, we demonstrate a synergistic...
Reactive oxygen and nitrogen species (RONS) have been shown to play important roles in various fields, including medical treatment (e.g. cancer and chronic wounds), food preservation, and water purification. It is well established that atmospheric pressure plasmas generate a wide variety of RONS in air near room temperature, including O2*, O3, OH, O, and NO. Those highly reactive species are hard...
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