scholarly journals Impact of non-thermal plasma treatment on the seed germination and seedling development of carrot (Daucus carota sativus L.)

2021 ◽  
Author(s):  
Rajesh Prakash Guragain ◽  
Hom Bahadur Baniya ◽  
Suman Prakash Pradhan ◽  
Santosh Dhungana ◽  
Ganesh Kuwar Chhetri ◽  
...  
Keyword(s):  
Seed Germination ◽  
Thermal Plasma ◽  
Growth Parameters ◽  
Radical Scavenging ◽  
Seedling Development ◽  
Carotenoid Content ◽  
Favorable Effect ◽  
Seed Surface ◽  
Non Thermal Plasma ◽  
The Impact

Abstract Seed germination is a complicated physiological process that starts with the seed absorbing water and concludes with the radicle emerging. The kinetics and amount of water uptake by seeds are known to be influenced by both seed surface properties and the surrounding environment. As a result, altering seed surface features are linked to seed medium and is a valuable strategy for controlling seed germination. In the agricultural field, non-thermal plasma surface activation of seeds is currently being investigated as an efficient pre-sowing treatment for modifying seed germination. The impact of non-thermal plasma (NTP) on the germination and seedling growth of carrot seeds at room temperature and atmospheric pressure for varied treatment times was investigated in this study. Seed's germination properties and growth parameters were examined for both control and NTP treated seeds. Germination-related parameters such as germination percentage, vigor index, and chlorophyll content were all improved by NTP treatment. However, no significant changes were seen in the carotenoid content. Similarly, the in-vitro radical scavenging activities, total phenol, and total flavonoid contents in the seedlings were altered by NTP treatment. Our results indicate that NTP treatment has a favorable effect on carrots germination and seedling development.

scholarly journals Effects of Non-Thermal Plasma Treatment on Seed Germination and Early Growth of Leguminous Plants—A Review

Plants ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 1616
Author(s):  
Božena Šerá ◽  
Vladimír Scholtz ◽  
Jana Jirešová ◽  
Josef Khun ◽  
Jaroslav Julák ◽  
...  
Keyword(s):  
Seed Germination ◽  
Plant Species ◽  
Thermal Plasma ◽  
Microbial Inactivation ◽  
Growth Stages ◽  
Agricultural Crop ◽  
Initial Growth ◽  
Total Production ◽  
Legume Seeds ◽  
Non Thermal Plasma

The legumes (Fabaceae family) are the second most important agricultural crop, both in terms of harvested area and total production. They are an important source of vegetable proteins and oils for human consumption. Non-thermal plasma (NTP) treatment is a new and effective method in surface microbial inactivation and seed stimulation useable in the agricultural and food industries. This review summarizes current information about characteristics of legume seeds and adult plants after NTP treatment in relation to the seed germination and seedling initial growth, surface microbial decontamination, seed wettability and metabolic activity in different plant growth stages. The information about 19 plant species in relation to the NTP treatment is summarized. Some important plant species as soybean (Glycine max), bean (Phaseolus vulgaris), mung bean (Vigna radiata), black gram (V. mungo), pea (Pisum sativum), lentil (Lens culinaris), peanut (Arachis hypogaea), alfalfa (Medicago sativa), and chickpea (Cicer aruetinum) are discussed. Likevise, some less common plant species i.g. blue lupine (Lupinus angustifolius), Egyptian clover (Trifolium alexandrinum), fenugreek (Trigonella foenum-graecum), and mimosa (Mimosa pudica, M. caesalpiniafolia) are mentioned too. Possible promising trends in the use of plasma as a seed pre-packaging technique, a reduction in phytotoxic diseases transmitted by seeds and the effect on reducing dormancy of hard seeds are also pointed out.

The Impact Evaluation of Factors on the Adhesion of Modified Polytetrafluoroethylene Films in a Glow Discharge Non-Thermal Plasma

2020 ◽  
Vol 992 ◽  
pp. 658-662
Author(s):  
M.A. Mokeev ◽  
L.A. Urkhanova ◽  
A.N. Khagleev ◽  
Denis B. Solovev
Keyword(s):  
Glow Discharge ◽  
Plasma Treatment ◽  
Thermal Plasma ◽  
Graphical Model ◽  
Polymer Surface ◽  
Practical Method ◽  
Wetting Angle ◽  
Regression Equations ◽  
Non Thermal Plasma ◽  
The Impact

Mechanical, chemical and plasma treatment are the main kind of treatment of polytetrafluoroethylene (PTFE) films. Each method is different from each other by the adhesive force: the value of the wetting angle. Mechanical treatment allows different particles to permeate into the structure of the polymer. Chemical treatment creates new functional groups on the polymer surface, but this method is toxic and dangerous. Plasma treatment, in a glow discharge non-thermal plasma, is a more ecological and practical method. The experiment showed that the plasma treatment successfully increases the adhesion, this has been proven by infrared spectroscopy and scanning electron microscopy. According to the obtained data of the wetting angle, the regression equation was derived. A graphical model is constructed by regression equations allows you to determine the main processing factor and choose the optimal values of treatment.

scholarly journals Indoor air quality improvement and purification by atmospheric pressure Non-Thermal Plasma (NTP)

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Prince Junior Asilevi ◽  
Patrick Boakye ◽  
Sampson Oduro-Kwarteng ◽  
Bernard Fei-Baffoe ◽  
Yen Adams Sokama-Neuyam
Keyword(s):  
Air Quality ◽  
Built Environment ◽  
Indoor Air Quality ◽  
Removal Efficiency ◽  
Indoor Air ◽  
Thermal Plasma ◽  
Processing Parameters ◽  
Optimum Conditions ◽  
Non Thermal Plasma ◽  
The Impact

AbstractNon-thermal plasma (NTP) is a promising technology for the improvement of indoor air quality (IAQ) by removing volatile organic compounds (VOCs) through advanced oxidation process (AOP). In this paper, authors developed a laboratory scale dielectric barrier discharge (DBD) reactor which generates atmospheric NTP to study the removal of low-concentration formaldehyde (HCHO), a typical indoor air VOC in the built environment associated with cancer and leukemia, under different processing conditions. Strong ionization NTP was generated between the DBD electrodes by a pulse power zero-voltage switching flyback transformer (ZVS-FBT), which caused ionization of air molecules leading to active species formation to convert HCHO into carbon dioxide (CO2) and water vapor (H2O). The impact of key electrical and physical processing parameters i.e. discharge power (P), initial concentration (Cin), flow rate (F), and relative humidity (RH) which affect the formaldehyde removal efficiency (ɳ) were studied to determine optimum conditions. Results show that, the correlation coefficient (R2) of removal efficiency dependence on the processing parameters follow the order R2 (F) = 0.99 > R2 (RH) = 0.96, > R2 (Cin) = 0.94 > R2 (P) = 0.93. The removal efficiency reached 99% under the optimum conditions of P = 0.6 W, Cin = 0.1 ppm, F = 0.2 m3/h, and RH = 65% with no secondary pollution. The study provided a theoretical and experimental basis for the application of DBD plasma for air purification in the built environment.

scholarly journals Non-Thermal Plasma Can Be Used in Disinfection of Scots Pine (Pinus sylvestris L.) Seeds Infected with Fusarium oxysporum

Forests ◽  
2020 ◽  
Vol 11 (8) ◽  
pp. 837
Author(s):  
Magdalena Świecimska ◽  
Mirela Tulik ◽  
Božena Šerá ◽  
Patrycja Golińska ◽  
Juliána Tomeková ◽  
...  
Keyword(s):  
Seed Germination ◽  
Pinus Sylvestris ◽  
Plasma Treatment ◽  
Fusarium Oxysporum ◽  
Scots Pine ◽  
Thermal Plasma ◽  
Optimal Time ◽  
Surface Barrier ◽  
Surface Barrier Discharge ◽  
Non Thermal Plasma

The aim of this study was to use diffuse coplanar surface barrier discharge (DCSBD) non-thermal plasma for the disinfection of pine seed surfaces infected with Fusarium oxysporum spores. Artificially infected seeds of Scots pine (Pinus sylvestris L.) were treated with plasma for the following exposure times: 1 s, 3 s, 5 s, 10 s, 15 s, 20 s, 30 s, and 60 s, and subsequently germinated on agar medium in Petri dishes at room temperature for the estimation of seed germination and disinfection effect of plasma treatment. Results of the treated samples were compared to the control samples, which were prepared as follows: seeds uninfected and non-treated with plasma (first control); seeds infected with F. oxysporum and non-treated with plasma (second control); and seeds infected with F. oxysporum, non-treated with plasma, but sterilized with 30% perhydrol (third control). Obtained results indicate that 3 s plasma treatment was an optimal time to inhibit F. oxysporum growth, and at the same time, increase the seed germination. In addition, our results are the first to show the practical application of non-thermal plasma in disinfecting infected Scots pine seeds and improving their germination. According to the results of this study, non-thermal plasma can serve as a seed surface disinfectant in the regeneration of different pine species.

scholarly journals Indoor Air Quality Improvement and Purification by Atmospheric Pressure Non-Thermal Plasma (NTP)

2021 ◽  
Author(s):  
Prince Junior Asilevi ◽  
Patrick Boakye ◽  
Sampson Oduro-Kwarteng ◽  
Bernard Fei-Baffoe ◽  
Yen Adams Sokama-Neuyam
Keyword(s):  
Air Quality ◽  
Built Environment ◽  
Indoor Air Quality ◽  
Removal Efficiency ◽  
Indoor Air ◽  
Thermal Plasma ◽  
Processing Parameters ◽  
Optimum Conditions ◽  
Non Thermal Plasma ◽  
The Impact

Abstract Non-thermal plasma (NTP) is a promising technology for the improvement of indoor air quality (IAQ) by removing volatile organic compounds (VOCs) through advanced oxidation process (AOP). In this paper, authors developed a laboratory scale dielectric barrier discharge (DBD) reactor which generates atmospheric NTP to study the removal of low-concentration formaldehyde (HCHO), a typical indoor air VOC in the built environment associated with cancer and leukemia, under different processing conditions. Strong ionization NTP was generated between the DBD electrodes by a pulse power zero-voltage switching flyback transformer (ZVS-FBT), which caused ionization of air molecules leading to active species formation to convert HCHO into carbon dioxide (CO2) and water vapor (H2O). The impact of key electrical and physical processing parameters i.e. discharge power (P), initial concentration (Cin), flow rate (F), and relative humidity (RH) which affect the formaldehyde removal efficiency (ɳ) were studied to determine optimum conditions. Results show that, the correlation coefficient (R²) of removal efficiency dependence on the processing parameters follow the order R² (F) = 0.99 > R² (RH) = 0.96, > R² (Cin) = 0.94> R² (P) = 0.93. The removal efficiency reached 98.45% under the optimum conditions of P=0.6 W, Cin=0.1 ppm, F=0.2 m3/h, and RH=65% with no secondary pollution. The study provided a theoretical and experimental basis for the application of DBD plasma for air purification in the built environment.

Catalytic and Electron Paramagnetic Resonance Spectroscopic Characterization of γ-Al2O3 in a Non-Thermal Plasma

2005 ◽  
Vol 8 (1) ◽  
Author(s):  
Ulf Roland ◽  
Frank Holzer ◽  
Andreas Pöppl ◽  
Frank-Dieter Kopinke
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Thermal Plasma ◽  
Pore Volume ◽  
Structural Changes ◽  
Peroxide Radical ◽  
Paramagnetic Resonance ◽  
Non Thermal Plasma ◽  
The Impact ◽  
Electron Paramagnetic ◽  
Inner Pore

AbstractIn order to evaluate the potential of the combination of non-thermal plasma (NTP) and in situ heterogeous catalysis (plasma catalysis) for the improvement of efficiency and selectivity towards total oxidation of organic pollutants, the impact of plasma processes inside the inner pore volume of porous materials was investigated by means of catalytic reactions and spectroscopy. Besides studying the conversion of organic model substances, electron paramagnetic resonance (EPR) spectroscopy was applied to detect both the formation of radical species by the NTP and the initiation of structural changes to the catalyst. The presence of short-lived oxidizing species and plasma effects in the inner pore volume of porous catalysts (alumina in this case) could be clearly shown by detecting a significant influence on the oxidation process and the formation of a paramagnetic site which can be correlated to an aluminum peroxide radical: Al-O-O. The relatively stable paramagnetic center (lifetime > 14 days) was formed by the NTP independently of the gas atmosphere, namely its oxygen content. The signal was not significantly affected by the application of reducing agents to the sample.

scholarly journals Chemical mechanisms of non-thermal plasma action on cells

2020 ◽  
Vol 5 (4) ◽  
pp. 104-116
Author(s):  
R. Ya. Olovyannikova ◽  
Т. A. Makarenko ◽  
E. V. Lychkovskaya ◽  
E. S. Gudkova ◽  
G. A. Muradyan ◽  
...  
Keyword(s):  
Thermal Plasma ◽  
Reactive Oxygen ◽  
Redox Balance ◽  
Biological Tissues ◽  
Specific Response ◽  
Nitrogen Species ◽  
Cellular Targets ◽  
Distinct Cell ◽  
Non Thermal Plasma ◽  
The Impact

Non-thermal plasma (NTP) in the air around the cell layer or biological tissues is considered as a generator of reactive oxygen and nitrogen species, ions, and solvated/aquated electrons. This review covers current understanding on the effects of NTP in living systems, with the focus on the role of free radicals and other NTP-generated particles in the chemical modification of biomacromolecules and regulation of signal transduction. We summarise recent data on the impact of NTP-originated products on intracellular redox balance, mitochondrial biogenesis, cell membranes and organelles. In addition, we discuss the transport of NTP products across the biological membranes. Since the expression of numerous transporter systems differs at various stages of development, distinct cell lines, and in pathological conditions, experiments on NTP effects should be designed in various models for the assessment of cell- and tissue-specific response. Notably, NTP effects are observed throughout the whole tissue even when particles are generated at the surface. Special attention is paid to the NTP-treated solutions (phosphate buffered saline, Ringer’s solution, cell culture medium) as their composition and pH can be significantly altered. However, these data also suggest novel opportunities for the application of NTP and NTP-treated solutions in biomedicine. Studies on the mechanisms of NTP action on biological systems should contain analysis of events coupled to generation and accumulation of reactive oxygen and nitrogen species, neutral compounds, solvated electrons, and detection of new cellular targets of their action. This would allow developing of efficient and safe protocols for NTP applications in biology and medicine.

The impact of non-thermal plasma on the adhesion of polyetherketoneketone (PEKK) to a veneering composite system

2020 ◽  
Vol 112 ◽  
pp. 104065
Author(s):  
Younis M ◽  
Unkovskiy A ◽  
Drexler T ◽  
Qian J ◽  
Wan G ◽  
...  
Keyword(s):  
Thermal Plasma ◽  
Composite System ◽  
Non Thermal Plasma ◽  
The Impact
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