The negative air ions (NAI) are used for the removal of particles or droplets from the air. In this study, three types of piezoelectric cold plasma generators (PCPG), in combination with cylindrical electrostatic ion filters, are applied for NAI production. The high voltage on the filter cylinder is induced by the electric field from the piezoelectric transformer of the PCPG. To achieve the dc bias, the cylinder of the electrostatic filter is connected to the ground over ultrafast switching diodes. The ion concentrations are measured for different airflows, PCPG powers, and electrostatic filter geometries. The NAI concentration in the order of magnitude of 107 cm−3, and a negative-to-positive ion concentration ratio of over 200 is reached. The production of ozone is evaluated and the PCPG configuration with a minimum ozone production rate is proposed. The ozone concentration below 60 ppb is reached in the airflow of 90 m3/h.
Plasma contains ultrashort single-stranded DNA in addition to
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Current challenges and best practices for cell-free long RNA
a Plasma free FABP4 levels (means) were significantly higher at 1
Plasma free metanephrines for diagnosis of neuroblastoma patients
Analysis of human blood plasma cell-free DNA fragment size
Low-pressure Low-temperature Plasma Experimental Power Supply, rated output
Increased plasma levels of circulating cell-free mitochondrial DNA
Plasma-Free Blood as a Potential Alternative to Whole Blood for
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