Students

Bc. level: 2011 - 2012
Supervisor: Karol Hensel
Title (en):
Biodecontamination by pulsed electrical discharges
Title (sk):
Biodekontaminácia impulznými elektrickými výbojmi
Abstract (en):  hide
In the presented work we focus on biodecontamination by low-temperature nonequilibrium plasma produced by pulsed electric discharges in atmospheric pressure air. Pulsed discharges were generated by rotary spark gap high-voltage power supply. The objective was to examine the pulsed discharges and their use for bio-decontamination of gram-positive spore forming bacteria Bacillus cereus, evaluate their efficiency and dependence on various parameters (amplitude and frequency of applied voltage, exposure time) and compare it with the results obtained with direct current power supply. Two types of discharges were tested – spark discharge and corona discharge. The effect of the spark discharge was tested on bacteria in solution by utilizing electrostatic atomization, while spores deposited on the surfaces were subjected to the corona discharge. Bacterial samples were cultivated on Petri dishes and evaluated by plate count method. The results showed that the biocidal effect of pulsed spark discharge was lower compared with the effect of transient spark discharge generated by a direct current voltage. On the other hand, the efficiency of the corona discharge generated by pulsed power supply was found to be 20% higher than one obtained with direct current power, with negative polarity to be more efficicent than positive one. The results demonstrate the positive potential of the pulsed discharge toward the deconamination of bacteria. However, to unequivocally confirm our results and determine the relationship of the efficiency and the amplitude and frequency of the pulses and exposure time, further experiments are needed.
Abstract (sk)

MSc. level: 2012 - 2014
Supervisor: Karol Hensel
Title (en):
Electrical discharge in contact with aqueous medium, their biological and chemical effects
Title (sk):
Elektrické výboje v kontake s vodnými roztokmi, ich biologické a chemické účinky
Abstract (en)
Abstract (sk)

PhD. level: 2014 - 2021
Supervisor: Karol Hensel
Title (en):
Cold plasma in a contact with liquid - Its chemical effects and selected biomedical and agriculture applications
Title (sk):
Studená plazma v kontakte s kvapalinami - Jej chemické účinky a vybrané biomedicínske a poľnohospodárske aplikácie
Abstract (en)
Abstract (sk)