Influence of wide-aperture rotating gliding discharge on sunflower seed germination
The results of the study of the influence of wide-aperture rotating gliding discharge on the germination of sunflower seeds under different conditions are presented. The emission spectra of the plasma torch of DC wideaperture rotating gliding discharge are investigated. Vibrational Tv and rotational...
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| Цитувати: | Influence of wide-aperture rotating gliding discharge on sunflower seed germination / O.A. Nedybaliuk, L.Iu. Mordvintseva, I.I. Fedirchyk, M.S. Maruschak, D.L. Chernolutsky // Problems of Atomic Science and Technology. — 2022. — № 6. — С. 114-118. — Бібліогр.: 14 назв. — англ. |
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nasplib_isofts_kiev_ua-123456789-1959042025-02-09T10:15:34Z Influence of wide-aperture rotating gliding discharge on sunflower seed germination Вплив обертового ковзного розряду на проростання насіння соняшника Nedybaliuk, O.A. Mordvintseva, L.Iu. Fedirchyk, I.I. Maruschak, M.S. Chernolutsky, D.L. Low temperature plasma and plasma technologies The results of the study of the influence of wide-aperture rotating gliding discharge on the germination of sunflower seeds under different conditions are presented. The emission spectra of the plasma torch of DC wideaperture rotating gliding discharge are investigated. Vibrational Tv and rotational Tr temperatures of plasma inside the torch at the outlet of the discharge chamber were determined. The dependences of the percentage of germination of sunflower seeds germinated under favourable (sufficient amount of sunlight) and unfavourable conditions (insufficient amount of sunlight) on the 10th and 20th day after planting at different time intervals of treatment with a wide-aperture rotating gliding discharge were investigated. The optimal treatment time was determined. Представлені результати дослідження впливу широкоапертурного обертового ковзного розряду на проростання соняшникового насіння за різних умов. Досліджено емісійні спектри плазми факелу широкоапертурного обертового ковзного розряду постійного струму. Визначено температури (коливні Tv та обертові Tr) плазми факелу на виході з розрядної камери. Побудовано залежності відсотку проростання насінин соняшника за сприятливих (достатня кількість сонячного світла) та несприятливих (недостатня кількість сонячного світла) умов на 10- та 20-й день після висадження за різних проміжків часу обробки широкоапертурним обертовим ковзним розрядом. Визначено найбільш оптимальний час обробки. This work was supported in part by the Ministry of Education and Science of Ukraine, the National Academy of Sciences of Ukraine, and the Taras Shevchenko National University of Kyiv. 2022 Article Influence of wide-aperture rotating gliding discharge on sunflower seed germination / O.A. Nedybaliuk, L.Iu. Mordvintseva, I.I. Fedirchyk, M.S. Maruschak, D.L. Chernolutsky // Problems of Atomic Science and Technology. — 2022. — № 6. — С. 114-118. — Бібліогр.: 14 назв. — англ. 1562-6016 PACS: 52.50.Dg, 52.80.-s, 52.77.−j DOI: https://doi.org/10.46813/2022-142-114 https://nasplib.isofts.kiev.ua/handle/123456789/195904 en Problems of Atomic Science and Technology application/pdf Національний науковий центр «Харківський фізико-технічний інститут» НАН України |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine |
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English |
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Low temperature plasma and plasma technologies Low temperature plasma and plasma technologies |
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Low temperature plasma and plasma technologies Low temperature plasma and plasma technologies Nedybaliuk, O.A. Mordvintseva, L.Iu. Fedirchyk, I.I. Maruschak, M.S. Chernolutsky, D.L. Influence of wide-aperture rotating gliding discharge on sunflower seed germination Problems of Atomic Science and Technology |
| description |
The results of the study of the influence of wide-aperture rotating gliding discharge on the germination of sunflower seeds under different conditions are presented. The emission spectra of the plasma torch of DC wideaperture rotating gliding discharge are investigated. Vibrational Tv and rotational Tr temperatures of plasma inside the torch at the outlet of the discharge chamber were determined. The dependences of the percentage of germination of sunflower seeds germinated under favourable (sufficient amount of sunlight) and unfavourable conditions (insufficient amount of sunlight) on the 10th and 20th day after planting at different time intervals of treatment with a wide-aperture rotating gliding discharge were investigated. The optimal treatment time was determined. |
| format |
Article |
| author |
Nedybaliuk, O.A. Mordvintseva, L.Iu. Fedirchyk, I.I. Maruschak, M.S. Chernolutsky, D.L. |
| author_facet |
Nedybaliuk, O.A. Mordvintseva, L.Iu. Fedirchyk, I.I. Maruschak, M.S. Chernolutsky, D.L. |
| author_sort |
Nedybaliuk, O.A. |
| title |
Influence of wide-aperture rotating gliding discharge on sunflower seed germination |
| title_short |
Influence of wide-aperture rotating gliding discharge on sunflower seed germination |
| title_full |
Influence of wide-aperture rotating gliding discharge on sunflower seed germination |
| title_fullStr |
Influence of wide-aperture rotating gliding discharge on sunflower seed germination |
| title_full_unstemmed |
Influence of wide-aperture rotating gliding discharge on sunflower seed germination |
| title_sort |
influence of wide-aperture rotating gliding discharge on sunflower seed germination |
| publisher |
Національний науковий центр «Харківський фізико-технічний інститут» НАН України |
| publishDate |
2022 |
| topic_facet |
Low temperature plasma and plasma technologies |
| url |
https://nasplib.isofts.kiev.ua/handle/123456789/195904 |
| citation_txt |
Influence of wide-aperture rotating gliding discharge on sunflower seed germination / O.A. Nedybaliuk, L.Iu. Mordvintseva, I.I. Fedirchyk, M.S. Maruschak, D.L. Chernolutsky // Problems of Atomic Science and Technology. — 2022. — № 6. — С. 114-118. — Бібліогр.: 14 назв. — англ. |
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Problems of Atomic Science and Technology |
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2025-11-25T19:51:30Z |
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ISSN 1562-6016. Problems of Atomic Science and Technology. 2022. №6(142).
114 Series: Plasma Physics (28), p. 114-118.
https://doi.org/10.46813/2022-142-114
INFLUENCE OF WIDE-APERTURE ROTATING GLIDING DISCHARGE
ON SUNFLOWER SEED GERMINATION
O.A. Nedybaliuk, L.Iu. Mordvintseva, I.I. Fedirchyk, M.S. Maruschak, D.L. Chernolutsky
Taras Shevchenko National University of Kyiv, Kyiv, Ukraine
E-mail: oanedybaliuk@knu.ua
The results of the study of the influence of wide-aperture rotating gliding discharge on the germination of
sunflower seeds under different conditions are presented. The emission spectra of the plasma torch of DC wide-
aperture rotating gliding discharge are investigated. Vibrational Tv and rotational Tr temperatures of plasma inside
the torch at the outlet of the discharge chamber were determined. The dependences of the percentage of germination
of sunflower seeds germinated under favourable (sufficient amount of sunlight) and unfavourable conditions
(insufficient amount of sunlight) on the 10th and 20th day after planting at different time intervals of treatment with
a wide-aperture rotating gliding discharge were investigated. The optimal treatment time was determined.
PACS: 52.50.Dg, 52.80.-s, 52.77.−j
INTRODUCTION
One of the goals of sustainable development is to
eliminate world hunger [1, 2]. The ways to achieve this
goal include increasing the yields of existing crops,
using existing fertile land more efficiently, and
establishing and supporting small farms. Several factors
can negatively affect crop yields, such as pests and
unfavourable weather conditions. Fungi on cereal seeds
can affect the quality of the crop and cause spoilage and
damage to the embryos during storage. They can infect
food grains, producing toxins that cause diseases in
humans or animals using these grains as food [3].
One method to prevent fungi's negative impact on
plant growth and storage is plasma treatment [4].
Nonequilibrium atmospheric pressure plasma has many
applications in various fields, such as surface treatment,
combustion enhancement, bacterial inactivation [4-6],
and contamination reduction [7]. Plasma is an effective
sterilization method and can be used for seed
disinfection as an alternative to chemicals [8]. One of
the sources of nonequilibrium atmospheric pressure
plasma can be a rotating gliding discharge [9-12].
This work is devoted to studying the effect of wide-
aperture rotating gliding discharge on the germination
of sunflower seeds.
1. EXPERIMENTAL SETUP AND
METHODOLOGY
Fig. 1 shows a schematic representation (see
Fig. 1,a) and a photo (see Fig. 1,b) of a plasma system
with a wide-aperture rotating gliding discharge designed
for treating sunflower seeds before planting. The
discharge chamber consisted of a quartz tube (1) with an
inner diameter of 36 mm, closed from above by a
dielectric kaprolon (polycaproamide) flange (2) and
from below by a stainless-steel flange (3). A T-shaped
stainless-steel high-voltage electrode (cathode) (4) was
mounted in the middle of the kaprolon flange. The
stainless-steel flange (anode) was grounded and had a
20 mm diameter hole in the middle. The distance
between the electrodes was 1 mm.
a
b
Fig. 1. Schematic representation (a) and photo (b) of
plasma system with rotating gliding discharge designed
for treating sunflower seeds before planting
mailto:oanedybaliuk@knu.ua
ISSN 1562-6016. Problems of Atomic Science and Technology. 2022. №6(142) 115
The wide-aperture rotating gliding discharge was
powered by a BP-100 power supply unit, which,
together with the 33 kΩ ballast resistance Rb, provided a
voltage of up to 7 kV at the discharge gap. Voltage and
current oscillograms were measured by an oscilloscope
(O) using a voltage divider made of resistors R1 and R2
(R1:R2 = 1000:1) to measure the discharge voltage and a
10 Ohm shunt resistance R3 to measure the discharge
current.
During the experiment, the atmospheric air was the
plasma gas. Air was supplied to the discharge chamber
using a Fiac Cosmos compressor. The airflow was
controlled using a Dwyer RMA-22 SSV rotameter [13].
It was introduced through an inlet made in the metal
flange into the discharge chamber tangentially to the
quartz tube's side wall, forming a vortex flow. The air
introduced into the discharge chamber was used to
generate plasma containing chemically active ions, free
radicals, and excited particles. The resulting
components moved via the torch of a rotating gliding
discharge to a Petri dish (5) containing sunflower seeds.
Optical emission spectroscopy of plasma radiation
was carried out using a Solar TII S-150-2-3648 USB
spectral device (6) and an optical fibre (7) installed at a
distance h from the bottom surface of the metal flange.
The light guide was oriented along the beam of vision
parallel to the surface of the metal flange. Emission
spectra were processed using a PC (8). The obtained
optical emission spectra were used to determine the
rotational and vibrational temperatures of hydroxyl
(OH) inside the plasma. The temperatures were
determined by comparing the experimental optical
emission spectra with the spectra simulated using the
SpecAir 2.2 program [14]. More information about this
method and the obtained temperatures is available in our
previous works [9-11].
Before the treatment with wide-aperture rotating
gliding discharge, sunflower seeds were placed in a
Petri dish, as shown in Fig. 2. The Petri dish was placed
under a plasma system with a wide-aperture rotating
gliding discharge. The distance from the lower plane of
the metal flange (anode) to the bottom of the Petri dish
was 20 mm. This distance was chosen to avoid thermal
damage to the seeds. The operating mode for the seed
treatment had a discharge current set to Id = 60 mA and
airflow into the discharge chamber Gd = 10 l min
-1
. The
seed treatment time varied from 0 to 8 minutes with a
step of 2 minutes. After treatment with a wide-aperture
rotating gliding discharge, the seeds were planted in
special containers with soil-filled cells (Fig. 3). Control
group of untreated seeds was also planted in the
containers alongside treated seeds. Only one sunflower
seed was planted into each cell. Seeds from one
treatment batch were planted in two containers, one
installed in a well-lit area of the laboratory and the other
in a poorly lit area. These two regimes for sunflower
seed germination were chosen to test the effect of
plasma on the germination of seeds planted under
adverse conditions (cloudiness, smoke, etc.). Sunflower
seed germination was monitored 10 and 20 days after
planting.
Fig. 2. Photo of sunflower seeds placed in Petri dish
before treatment with wide-aperture rotating gliding
discharge
Fig. 3. Photo of typical container with soil-filled
cells in which both untreated and treated with wide-
aperture rotating gliding discharge sunflower seeds
were planted
2. RESULTS AND DISCUSSION
A typical plasma emission spectrum of a wide-
aperture rotating gliding discharge is shown in Fig. 4.
The emission spectrum includes bands of such
components as hydroxyl OH, nitric oxide NO and
nitrogen N2. The main components in the emission
spectrum are hydroxyl OH and nitrogen N2. Nitrogen is
the main component of air, and hydroxyl can be formed
from water vapour (H2O), which is also present in the
atmospheric air. By comparing the experimentally
measured optical emission spectra with the ones
simulated using the SpecAir 2.2 program [14], the
rotational and vibrational plasma temperatures were
determined from the hydroxyl OH bands
(Tr = (2500 ± 200) K, Tv = (4000 ± 500) K). More
detailed results of optical emission spectroscopy of the
plasma of a wide-aperture rotating gliding discharge
under different operating modes can be found in
previous works [10, 11].
116 ISSN 1562-6016. Problems of Atomic Science and Technology. 2022. №6(142)
Under the influence of airflow, the current channel
rotates, and the ends of the current channel glide along
the surface of the T-shaped electrode (cathode) and the
metal flange (anode). As a result of this movement,
specks corresponding to cathode spots are observed on
the cathode surface (Fig. 5).
Fig. 6 shows the photo of sunflower seeds
germinated under favourable conditions on the 10th,
20th and 30th day after planting.
Fig. 7 shows the percentage of germination of
sunflower seeds germinated under favourable conditions
on the 10th and 20th day after planting relative to the
number of planted seeds. The most optimal treatment
time for sunflower seeds germinating in favourable
conditions (sufficient sunlight) was 2 and 4 min on the
10th day. As of the 20th day, the most optimal time is
2 min at which all seeds have germinated. As of the
20th day after planting, the germination was better in
sunflower seeds treated with wide-aperture rotating
gliding discharge compared to the untreated seeds.
Fig. 4. Typical emission spectrum of plasma of wide-
aperture rotating sliding discharge at discharge current
Id = 60 mA, airflow into discharge chamber
Gd = 10 l/min
-1
Fig. 5. Typical photo of T-shaped cathode after
long-term operation
a
b
c
Fig. 6. Photo of sunflower seeds germinated under
favourable conditions on the 10th (a), 20th (b) and 30th
(c) day after planting
ISSN 1562-6016. Problems of Atomic Science and Technology. 2022. №6(142) 117
a
b
Fig. 7. Dependence of percentage of germination of
sunflower seeds germinated under favourable
conditions on 10th (a) and 20th (b) day after planting
relative to number of seeds planted for different modes
of operation: 0 (control), 2, 4, 6, 8 min
Fig. 8 shows the percentage of germination of
sunflower seeds growing under unfavourable conditions
on the 10th and 20th day after planting relative to the
number of planted seeds. In this case, germination
occurred under unfavourable conditions (insufficient
sunlight). As of the 20th day, the germination
percentage of seeds that were treated with a wide-
aperture rotating gliding discharge for 6 min ang
germinated under unfavourable conditions coincided
with the germination percentage of the untreated seeds
germinated in favourable conditions. For the shorter
treatment times and the control group, the observed
germination percentage was very small. In the case of
insufficient sunlight, the percentage of germination of
sunflower seeds rises with the increase of treatment
time. The observed results show that it is better to treat
sunflower seeds with wide aperture rotating gliding
discharge before planting.
a
b
Fig. 8. Dependence of percentage of germination of
sunflower seeds germinated under unfavourable
conditions on 10th (a) and 20th (b) day after planting
relative to number of seeds planted for different modes
of operation: 0 (control), 2, 4, 6, 8 min
These findings can have a significant impact on the
agricultural sector, as the described method of treatment
is independent of logistics (all that is needed is air and
electricity), does not require the purchase of pesticides
and improves seed germination even in case of changing
weather conditions when plants do not receive enough
sunlight. Also, this method reduces harmful emissions
into water (chemical industry waste) and air (waste from
transportation), which, together with independence from
the delivery of chemical treatments, is extremely
important.
CONCLUSIONS
The influence of wide-aperture rotating gliding
discharge on the germination of sunflower seeds under
favourable conditions (sufficient amount of sunlight)
and unfavourable conditions (insufficient amount of
sunlight) was investigated.
118 ISSN 1562-6016. Problems of Atomic Science and Technology. 2022. №6(142)
As of the 20th day after planting sunflower seeds
under favourable conditions, the germination of
sunflower seeds treated with a wide-aperture rotating
gliding discharge is better for all processing times (in
the range of 2 to 8 min) compared to untreated seeds.
The optimal treatment time with a wide-aperture
rotating gliding discharge for germination under
sufficient sunlight is 2 min.
The percentage of germination of sunflower seeds
under unfavourable conditions (lack of sunlight)
increases with the longer treatment time (in the range
from 0 to 6 min) using a wide-aperture rotating gliding
discharge. For actual unpredictable weather conditions
(insufficient sunlight), it is better to treat the seeds with
a wide-aperture rotating gliding discharge just before
planting. The positive effect of treatment may stem
from stimulation of germination in sunflower seed by
the plasma of wide-aperture rotating gliding discharge.
ACKNOWLEDGEMENTS
This work was supported in part by the Ministry of
Education and Science of Ukraine, the National
Academy of Sciences of Ukraine, and the Taras
Shevchenko National University of Kyiv.
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ВПЛИВ ОБЕРТОВОГО КОВЗНОГО РОЗРЯДУ НА ПРОРОСТАННЯ НАСІННЯ СОНЯШНИКА
О.А. Недибалюк, Л.Ю. Мордвінцева, І.І. Федірчик, М.С. Марущак, Д.Л. Чернолуцький
Представлені результати дослідження впливу широкоапертурного обертового ковзного розряду на
проростання соняшникового насіння за різних умов. Досліджено емісійні спектри плазми факелу широко-
апертурного обертового ковзного розряду постійного струму. Визначено температури (коливні Tv та
обертові Tr) плазми факелу на виході з розрядної камери. Побудовано залежності відсотку проростання
насінин соняшника за сприятливих (достатня кількість сонячного світла) та несприятливих (недостатня
кількість сонячного світла) умов на 10- та 20-й день після висадження за різних проміжків часу обробки
широкоапертурним обертовим ковзним розрядом. Визначено найбільш оптимальний час обробки.
https://sdgs.un.org/goals
https://sdgs.un.org/goals
http://blog.dwyer-inst.com/2017/09/06/variable-area-flow-corrections/#sthash.syxIW2q1.dpbs
http://blog.dwyer-inst.com/2017/09/06/variable-area-flow-corrections/#sthash.syxIW2q1.dpbs
http://blog.dwyer-inst.com/2017/09/06/variable-area-flow-corrections/#sthash.syxIW2q1.dpbs
http://www.specair-radiation.net/
|