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A self-made microplasma jet array device is used to treat deoxyadenosine (dA) and adenosine (Ado) solutions to avoid the effect of air on genetic materials. Results show that Ado is easily converted into dA through deoxidation reaction. In addition, dA solution is treated with different microplasma arrays (i.e., atmospheric-pressure Ar, N2, air, and O2­) for comparative analysis. The dA molecule is relatively stable within the Ar plasma for 3 min treatment time. This molecule can be modified into different structures with N2, air, and O2 microplasma arrays. The results obtained in this study provide references for the application of plasma in biology and the effect of oxygen-containing free radicals in biological plasma. [ABSTRACT FROM AUTHOR]

Plant diseases resulting from plant pathogens are profoundly affecting crops worldwide. In this study, the tomato pathogen Cladosporium fulvum ( C. fulvum) have been inactivated by using the atmospheric-pressure plasma jet (APPJ). The results show that the inactivation efficiencies of C. fulvum are dependent on the plasma density and treatment time. The APPJ with a relatively high plasma density can completely kill the resistant C. fulvum within the treatment time of 60 s. Due to plasma generating electrostatic force, the outer membrane of C. fulvum is disrupted and the cytoplasm is released to the surrounding medium. Both protein and DNA molecules can be destroyed during the plasma inactivation. Meanwhile, the APPJ can also provide a novel approach to decrease the rotting rates of C. fulvum-infected tomato seeds. [ABSTRACT FROM AUTHOR]