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Zuzana KOVAĽOVÁ, born Šipoldová
alumni student
Bc. study
2009 - 2010
Supervisor: Zdenko Machala
Title:
Bio-decontamination of surfaces from bacterial spores in electric discharges
Abstract:
MSc. study
2010 - 2012
Supervisor: Zdenko Machala
Title:
Bio-decontamination of teeth and plastic surfaces by cold plasma of corona discharge
Abstract:
The bio-decontamination of Streptococci bio lm on teeth
and plastic surfaces is the main interest of this work. For this
purpose, we used cold plasma of two corona discharges: positive
streamer corona and negative Trichel pulses. We show
that decontamination by these atmospheric pressure air DC
discharges is a new ecient method for bio lm elimination
from teeth and plastic surfaces. We also tested positive transient
spark, though it was not suitable for expositions longer
than 2 minutes. Corona reduced bacterial population (evaluated
by log10) on contaminated teeth by 2.73 orders of
magnitude in 10 min exposure time in average.
The same discharges were also tested with the electrospraying
of water through a hollow needle - high voltage
electrode. Enhancement of plasma biocidal eects by water
spraying was investigated. Our results display that reduction
of bacterial population without water spraying on plastic
and teeth were similar - around 1 log (e.g. 90%). Water
spraying increased the bacterial reduction up to 4 logs with
both types of samples.
An analysis of tooth surfaces after plasma treatment was
made by visualisation of treatment surface with a scanning
electron microscope (SEM) and spectroscopic analysis with
Fourier transform infrared spectroscopy (FTIR) and energydispersive
X-ray analysis (EDX). We found small changes in
the morphology and the sample composition caused by exposition
to plasma for 10 min on SEM images and EDX
spectra. However, these results are not nal and require further
investigations.
PhD. study
2012 - 2016
Supervisor: Zdenko Machala
Title:
Bio-decontamination of biofilms on surfaces by cold plasma
Abstract:
In this dissertation thesis project, applications of low temperature
plasma at atmospheric pressure are discussed. In particular, bio-decontamination of bacterial biofilms on flat and complex surfaces by air corona discharges and argon plasma bullets. We provide an overview of biofilms, plasmas, and bio-decontamination by low-temperature plasma, we also present methods which are used for biofilm decontamination studies in plasma medicine domain. We describe three plasma sources which will be used for decontamination of bacterial biofilms and planktonic bacteria. Biological materials and analytical methods are characterized. We present some of the results obtained
during the first period of author’s PhD study.
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Active
Richard CIMERMAN
Július GÁLIK
Paulína HALUŠKOVÁ
Axel HENNECKE
Daniel JAKUBČIN
Katarína KUČEROVÁ, born Tarabová
Pavol MIŠENKO
Diana RAČKOVÁ
Barbora TARABOVÁ
Alumni
Hana BUCHHOLCEROVÁ
Veronika DRENINOVÁ, born Biskupičová
Lukáš DVONČ
Dušan GIERTL
Lenka CHLÁDEKOVÁ
Karolína JANÍKOVÁ
Igor JEDLOVSKÝ
Matej KINTLER
Matej KOVÁČ
Zuzana KOVAĽOVÁ, born Šipoldová
Daniela KUNECOVÁ
Lenka LEŠTINSKÁ
Michal LEŠTINSKÝ
Matej MOLNÁR
Adriana NIKLOVÁ
Samuel OMASTA
Lucia PAKOSOVÁ
Michal PELACH
Adam POLAKOVIČ
Branislav PONGRÁC
Milan PRAČKO
Jozef SIČ
Lucia STRIŽENCOVÁ
Anna SUČANSKÁ
Juraj ZIGO
Andrea ŽILKOVÁ
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