Corona discharge influence on micro-organisms
It is known, that the electric discharge can be used for micro-organism killing. Presented paper describes first qualitative results of atmospheric corona discharge influence on moulds (penicillium digitatum) experimental study. It seems, that the atmospheric corona discharge inhibits the fungi grow...
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Національний науковий центр «Харківський фізико-технічний інститут» НАН України
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| Цитувати: | Corona discharge influence on micro-organisms / V. Scholtz // Вопросы атомной науки и техники. — 2005. — № 1. — С. 190-191. — Бібліогр.: 3 назв. — англ. |
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nasplib_isofts_kiev_ua-123456789-791502025-02-09T15:26:15Z Corona discharge influence on micro-organisms Вплив коронного розряду на мікроорганізми Влияние коронного разряда на микроорганизмы Scholtz, V. Low temperature plasma and plasma technologies It is known, that the electric discharge can be used for micro-organism killing. Presented paper describes first qualitative results of atmospheric corona discharge influence on moulds (penicillium digitatum) experimental study. It seems, that the atmospheric corona discharge inhibits the fungi growth only. It seems, it does not kill both the living organism of mould and the spores. Preliminary experimental results indicate, that the ozone generated by atmospheric corona dicharge does not influence the fungi, too. Відомо, що електричний розряд може бути використаний для знищення мікроорганізмів. В роботі, що надається, описані перші якісні результати експериментального дослідження впливу атмосферного коронного розряду на плісеневий грибок (penicillium digitatum). Здається, що коронний розряд лише перешкоджає зросту грибків, але не вбиває ані організм плісені, що живе, ані її спори. Попередні результати експерименту вказують, що озон, який генерується атмосферним коронним розрядом , також не впливає на грибки. Известно, что электрический разряд можно использовать для уничтожения микроорганизмов. В представленной работе описаны первые качественные результаты экспериментального исследования влияния атмосферного коронного разряда на плесенный грибок (penicillium digitatum). Представляется, что коронный разряд лишь препятствует росту грибков, но не убивает ни живущий организм плесени, ни её споры. Предварительные результаты эксперимента показывают, что озон, который генерируется атмосферным коронным разрядом, также не влияет на грибки. This research has been supported by the GACR grant “Advanced Topics in Physics and Chemistry of Plasma“ No. 202-03-H162. 2005 Article Corona discharge influence on micro-organisms / V. Scholtz // Вопросы атомной науки и техники. — 2005. — № 1. — С. 190-191. — Бібліогр.: 3 назв. — англ. 1562-6016 PACS: 52.80.Hc https://nasplib.isofts.kiev.ua/handle/123456789/79150 en Вопросы атомной науки и техники application/pdf Національний науковий центр «Харківський фізико-технічний інститут» НАН України |
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Low temperature plasma and plasma technologies Low temperature plasma and plasma technologies Scholtz, V. Corona discharge influence on micro-organisms Вопросы атомной науки и техники |
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It is known, that the electric discharge can be used for micro-organism killing. Presented paper describes first qualitative results of atmospheric corona discharge influence on moulds (penicillium digitatum) experimental study. It seems, that the atmospheric corona discharge inhibits the fungi growth only. It seems, it does not kill both the living organism of mould and the spores. Preliminary experimental results indicate, that the ozone generated by atmospheric corona dicharge does not influence the fungi, too. |
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Article |
| author |
Scholtz, V. |
| author_facet |
Scholtz, V. |
| author_sort |
Scholtz, V. |
| title |
Corona discharge influence on micro-organisms |
| title_short |
Corona discharge influence on micro-organisms |
| title_full |
Corona discharge influence on micro-organisms |
| title_fullStr |
Corona discharge influence on micro-organisms |
| title_full_unstemmed |
Corona discharge influence on micro-organisms |
| title_sort |
corona discharge influence on micro-organisms |
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Національний науковий центр «Харківський фізико-технічний інститут» НАН України |
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2005 |
| topic_facet |
Low temperature plasma and plasma technologies |
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https://nasplib.isofts.kiev.ua/handle/123456789/79150 |
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Corona discharge influence on micro-organisms / V. Scholtz // Вопросы атомной науки и техники. — 2005. — № 1. — С. 190-191. — Бібліогр.: 3 назв. — англ. |
| series |
Вопросы атомной науки и техники |
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AT scholtzv coronadischargeinfluenceonmicroorganisms AT scholtzv vplivkoronnogorozrâdunamíkroorganízmi AT scholtzv vliâniekoronnogorazrâdanamikroorganizmy |
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2025-11-27T10:09:52Z |
| last_indexed |
2025-11-27T10:09:52Z |
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1849937833647669248 |
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CORONA DISCHARGE INFLUENCE ON MICRO-ORGANISMS
V.Scholtz
Czech Technical University, Faculty of Electrical Engineering, Department of Physics,
Technickб 2, 166 27 Praha 6, Czech Republic
It is known, that the electric discharge can be used for micro-organism killing. Presented paper describes first
qualitative results of atmospheric corona discharge influence on moulds (penicillium digitatum) experimental study. It
seems, that the atmospheric corona discharge inhibits the fungi growth only. It seems, it does not kill both the living
organism of mould and the spores. Preliminary experimental results indicate, that the ozone generated by atmospheric
corona dicharge does not influence the fungi, too.
PACS: 52.80.Hc
INTRODUCTION
As published [1], the electric discharge has
bacteriocid effect, but it is interesting how the electric
discharge influence on moulds. New method of moulds
killing has multilateral usage. The transported tropical
fruits or the seed so sowing are treated by chemical
resources for the mould defence, what is expensive and
unwholesome. For medical and food industry it is very
interesting to find new and low-cost methods of the fungi
killing. The paper presents results of study of atmospheric
corona discharge conceived fungicid influences on the
mould penicillium digitatum. The used experimental
equipment and method are described bellow.
GROWTH AND REPRODUCTION OF THE
MOULDS
Moulds are eukaryotic, nonphotosyntetic organisms.
Body of it is made of tiny filaments or tubes called
hyphae, which contain cytoplasm ans nuclei. Tangled
mats of hyphae are known as mycelium (Fig. 1 [3]), they
grow rapidly from the tips by cell division.
Fig. 1. Mycelium of mould [3]
The reproduction of moulds may be asexually or sexually,
the asexual reproduction produces genetical identical
organisms and is the most common method used. Near it,
the mould began fruit by modification of the ends of it's
hyphae and the spores are produced (Fig. 2 [3]). The
spores are transported by wind, water or other way and
when spore lands on moist surface, new hyphae are
formed.
APPARATUS SETTING
The scheme of the experimental apparatus is shown in
figure [3]. It consisted from a box (cca 1l) where were
inserted two samples under study. In the box burns the
corona discharge on the tip of one electrode with voltage
4-6kV (determined by the distance between electrode and
sample) and current 0.01mA. One sample was put into the
discharge (6-7mm from the tip of electrode), the second
one was the reference sample. Near and in the burning
corona, there were created some free radicals. These
radicals had decomposed in the neighbourhood of the first
sample. Together with creation of radicals developed
ozone. Generated ozone spread in the whole space of the
box. We were studying both influence of corona
discharge and ozone on samples.
Fig. 2. Spores of mould [3]
Fig. 3. Apparatus setting
EXPERIMENTS
We were studying the influence of corona discharge in
described apparatus on the moulds, following experiments
were proceed:
• The spores of penicillium digitatum placed on a
metal plate were exposed to atmospheric corona
discharge and ozone or ozone only for about two
days (on described two places in box). Then the
treatment was stopped and spores were seeded in the
cultivating medium. Their growth did not exhibit any
difference from untreated ones.
190 Problems of Atomic Science and Technology. 2005. № 1. Series: Plasma Physics (10). P. 190-191
• Subsequently other spores of penicillium digitatum
inoculated in the cultivating medium were exposed to
corona discharge and ozone or ozone only for about
two days. Two days is a typical time of spores
sprouting and growing to visible size [2]. The spores
exposed by corona discharge and ozone did not
sprout during the treatment, but the sprouting started
after removal of the discharge. On the other hand the
growth of spores in medium exposed only to ozone
did not exhibit any difference (see Fig. 4).
a b
Fig. 4. Cultivating medium with penicillium digitatum.
Exposed for two days to ozone only (a) and to corona
discharge and ozone (b)
After this we know, that the corona discharge only
inhibit the growing of the mould spores. We were looking
for some transient line of the growth inhibition and
following experiment was proceed:
• The spores of penicillium digitatum inoculated in
relatively large space cultivating medium were
exposed to corona discharge for about two days,
apparatus is shown on figure 3. The fotography of
the result is shown on firuge 4. It is visible, that the
boudary between inhibited and non inhibited area is
sharp.
THE RESULTS
The ozone generated by corona discharge did exhibit
no or very limited influence on moulds sprouting and
growth. The moulds treatment by corona discharge stopped
the moulds sprouting only, but did not kill the spores.
For more detailed explanation further experiments are
necessary, especially determination of ozone
concentration dependent conditions of moulds killing and
determination of sprout inhibition mechanism.
Fig. 3 The apparatus with relatively large space
cultivating medium exposed to corona discharge
Fig. 4. The fotography of cultivating medium after two
days. It is wisible, that the boudary between inhibited and
non inhibited area is sharp
ACKNOWLEDGMENT
This research has been supported by the GACR grant
“Advanced Topics in Physics and Chemistry of Plasma“
No. 202-03-H162.
REFERENCES
[1] R.S. Sigmond, B. Kurdelova, M. Kurdel. Action of
corona discharges on bacteria and spores // Czechoslovak
Journal of Physics (49). 1999, p.405-420.
[2] L. Silhankova. Mikrobiologie pro potravinare a
biotechnology. Praha: „Victoria Publisching“, 1995.
[3] http://sps.k12.ar.us/massengale/fungi_notes_b1.htm
ВЛИЯНИЕ КОРОННОГО РАЗРЯДА НА МИКРООРГАНИЗМЫ
В. Шольтц
Известно, что электрический разряд можно использовать для уничтожения микроорганизмов. В
представленной работе описаны первые качественные результаты экспериментального исследования влияния
атмосферного коронного разряда на плесенный грибок (penicillium digitatum). Представляется, что коронный
разряд лишь препятствует росту грибков, но не убивает ни живущий организм плесени, ни её споры.
Предварительные результаты эксперимента показывают, что озон, который генерируется атмосферным
коронным разрядом, также не влияет на грибки.
ВПЛИВ КОРОННОГО РОЗРЯДУ НА МІКРООРГАНІЗМИ
В. Шольтц
Відомо, що електричний розряд може бути використаний для знищення мікроорганізмів. В роботі, що
надається, описані перші якісні результати експериментального дослідження впливу атмосферного коронного
розряду на плісеневий грибок (penicillium digitatum). Здається, що коронний розряд лише перешкоджає зросту
грибків, але не вбиває ані організм плісені, що живе, ані її спори. Попередні результати експерименту вказують,
що озон, який генерується атмосферним коронним розрядом , також не впливає на грибки.
191
192
Corona Discharge INFLUENCE ON MICRO-ORGANISMS
Introduction
Growth and reproduction of the moulds
The reproduction of moulds may be asexually or sexually, the asexual reproduction produces genetical identical organisms and is the most common method used. Near it, the mould began fruit by modification of the ends of it's hyphae and the spores are produced (Fig. 2 [3]). The spores are transported by wind, water or other way and when spore lands on moist surface, new hyphae are formed.
Apparatus setting
Experiments
The results
Acknowledgment
References
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