scholarly journals THE WATER TREATED WITH LOW-FREQUENCY LOW-PRESSURE GLOW PLASMA ENHANCES THE PHYTOAVAILABILITY OF SELENIUM AND PROMOTES THE GROWTH OF SELENIUM-TREATED CUCUMBER PLANTS

2018 ◽  
pp. 109-116 ◽  
Author(s):  
Barbara Hawrylak-Nowak ◽  
Sławomir Dresler ◽  
Renata Matraszek-Gawron ◽  
Zdzisław Oszczęda ◽  
Mag Pogorzelec
Keyword(s):  
Low Frequency ◽  
Low Pressure ◽  
Glow Plasma

scholarly journals Cultivation of Cress Involving Water Treated Under Different Atmospheres with Low-Temperature, Low-Pressure Glow Plasma of Low Frequency

Water ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 2152
Author(s):  
Katarzyna Ciesielska ◽  
Wojciech Ciesielski ◽  
Damian Kulawik ◽  
Zdzisław Oszczęda ◽  
Piotr Tomasik
Keyword(s):  
Ascorbic Acid ◽  
Low Temperature ◽  
Chlorophyll Content ◽  
Tap Water ◽  
Low Frequency ◽  
Low Pressure ◽  
Total Chlorophyll ◽  
Total Chlorophyll Content ◽  
Glow Plasma ◽  
Water Saturated

Watering cress with tap water treated for 30 min with low-temperature, low-pressure glow plasma of low frequency (LPGP) in the air (LPGPA), saturated with either nitrogen (LPGPN), CO2 (LPGPC) or methane (LPGPM), promoted the yield of crops. Their efficiency increased in the order LPGPA < LPGPN < LPGPM < LPGPC. The kind of water prior and after the treatment specifically influenced the fat and protein content in the watered cress and had no effect on the carbohydrate content. Watering cress with water saturated with N2 and CO2 slightly increased the total chlorophyll content, whereas watering with water saturated with CH4 significantly decreased it. Watering with plasma-treated water always resulted in an increase in the total chlorophyll content and subtly influenced the content of carotenoids and ascorbic acid. Watering cress with water saturated with particular gases influenced the bioaccumulation of cations and anions.

scholarly journals Reaction of Lavandula angustifolia Mill. to Water Treated with Low-Temperature, Low-Pressure Glow Plasma of Low Frequency

Water ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 3168 ◽  
Author(s):  
Katarzyna Ciesielska ◽  
Wojciech Ciesielski ◽  
Tomasz Girek ◽  
Henryk Kołoczek ◽  
Zdzisław Oszczęda ◽  
...  
Keyword(s):  
Low Temperature ◽  
Essential Oils ◽  
Crop Yields ◽  
Tap Water ◽  
Low Frequency ◽  
Specific Effect ◽  
Low Pressure ◽  
Dry Mass ◽  
Lavandula Angustifolia ◽  
Glow Plasma

Lavandula angustifolia was watered with either deionized tap water treated with low-temperature, low-pressure glow plasma of low frequency in the air (LPGPA), under oxygen-free nitrogen (LPGPN), methane (LPGPM), carbon dioxide (LPGPC) or molecular oxygen (LPGPO). The crop yields were slightly dependent on the type of water used for watering. Notably, only plants watered with LPGPN showed a slightly higher crop yield. The plants also contained a higher level of protein and bioaccumulated magnesium. The type of water had a considerable and specific effect on the yield of isolated essential oils and their composition. The yield of essential oil decreased in the following order LPGPA = LPGPN (0.4 g/100 g dry mass) > LPGPC = LPGPO (0.3 g/100 g dry mass) > LPGPM = non-treated water (0.2 g/100 g dry mass). The composition of the isolated essential oils varied depending on the type of water used for watering, which influences their role as a fragrant component of cosmetics, and in herbal therapy and aromatherapy.

scholarly journals Specific Controlling Essential Oil Composition of Basil (Ocimum basilicum L.) Involving Low-Temperature, Low-Pressure Glow Plasma of Low Frequency

Water ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 3332
Author(s):  
Wojciech Ciesielski ◽  
Maciej Gąstoł ◽  
Damian Kulawik ◽  
Zdzisław Oszczęda ◽  
Elżbieta Pisulewska ◽  
...  
Keyword(s):  
Low Temperature ◽  
Essential Oil ◽  
Total Yield ◽  
Low Frequency ◽  
Low Pressure ◽  
Ocimum Basilicum ◽  
Oil Composition ◽  
Plant Metabolites ◽  
Treated Water ◽  
Glow Plasma

The effect of watering basil (Ocimum basilicum L.) with water treated with low-pressure, low-temperature glow plasma of low frequency (LPGP) on growth habits and plant metabolites was tested. Watering with the LPGP treated water was beneficial for sprouting basil seeds. Watering with non-treated water was advantageous solely for the number of leaves per plant and mass of one leaf. Watering with the LPGP treated water in contact with the air (LPGPA), nitrogen (LPGPN), carbon dioxide (LPGPC), and methane (LPGPM) increased the total yield of collected essential oil by 40%, 60%, 20%, and 20%, respectively. Watering with water treated under molecular oxygen (LPGPO) decreased that yield by 12.5%. A diverse effect of particular kinds of the LPGP treated water upon the composition of isolated essential oil was also noted.

scholarly journals Structure and Physicochemical Properties of Water Treated under Carbon Dioxide with Low-Temperature Low-Pressure Glow Plasma of Low Frequency

Water ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 1920 ◽  
Author(s):  
Aleksandra Ciesielska ◽  
Wojciech Ciesielski ◽  
Karen Khachatryan ◽  
Henryk Koloczek ◽  
Damian Kulawik ◽  
...  
Keyword(s):  
Low Temperature ◽  
Thermal Effects ◽  
Treatment Time ◽  
Low Frequency ◽  
Free Water ◽  
Low Pressure ◽  
Treated Water ◽  
Single Donor ◽  
Glow Plasma ◽  
Water Saturated

Treatment of water saturated with CO2 with low-temperature, low-pressure glow plasma of low-frequency (GP) produced a series of liquids. Their temperature and intensity of thermal effects non-linearly depended on the treatment time. However, the Raman spectra patterns of the treated water pointed to a specific structure of the water treated for 30 min. The spectra of control, non-treated water saturated with CO2, and such water treated for 15, 60, 90, and 120 min showed that their macrostructure was built mainly by a single donor, and single hydrogen bonded arrangements accompanied, to a certain extent, with free water molecules. The macrostructure of the water treated for 30 min consisted chiefly of tetrahedral and deformed tetrahedral structural units. That water contained long-living free radicals of discussed structure, stabilized in such macrostructure.

scholarly journals Effect of Watering of Selected Seasoning Herbs with Water Treated with Low-Temperature, Low-Pressure Glow Plasma of Low Frequency

Water ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 3526
Author(s):  
Katarzyna Ciesielska ◽  
Wojciech Ciesielski ◽  
Tomasz Girek ◽  
Zdzisław Oszczęda ◽  
Piotr Tomasik
Keyword(s):  
Low Temperature ◽  
Essential Oil ◽  
Essential Oils ◽  
Crop Yield ◽  
Low Frequency ◽  
Low Pressure ◽  
Yield And Quality ◽  
Quality Water ◽  
Glow Plasma

Plantations of lovage, marjoram, rosemary and thyme were watered with water treated with low-temperature, low-pressure glow plasma of low frequency. Such watering appeared beneficial to the extent dependent on particular herb. In terms of crop yield and quality, water treated with glow plasma performed best in the case of rosemary, and the worst results were observed for thyme. When yield of essential oils are taken into account, only in the case of lovage did such watering appear beneficial, while in the remaining cases it had no effect. However, such watering considerably changed the composition of essential oils. These changes were specific for a given herb and involved the quantity of particular components of the oils. Only in the essential oil from lovage did γ-terpinene appear as its novel component.

scholarly journals Structure and some physicochemical and functional properties of water treated under ammonia with low-temperature low-pressure glow plasma of low frequency

2020 ◽  
Vol 18 (1) ◽  
pp. 1195-1206 ◽  
Author(s):  
Aleksandra Ciesielska ◽  
Wojciech Ciesielski ◽  
Henryk Kołoczek ◽  
Damian Kulawik ◽  
Joanna Kończyk ◽  
...  
Keyword(s):  
Low Temperature ◽  
Treatment Time ◽  
Low Frequency ◽  
Water Hardness ◽  
Hard Water ◽  
Low Pressure ◽  
Scale Removal ◽  
Mineralized Water ◽  
Calcium Magnesium ◽  
Glow Plasma

AbstractDeionized, tap and two kinds of commercially available mineralized water, after supplementation with ammonia, were treated with low-pressure, low-temperature glow plasma (GP) of low frequency. Treating hard water with ammonia provided the removal of permanent and temporary water hardness already at room temperature. On such treatment, mineralized water supplemented with ammonia was partly demineralized. Precipitated rhombohedral deposit from hard water did not turn into scale even when maintained in suspension for 3 days at around 90°C. In such manner, the use of other chemicals for prevention from the scale formation and/or for the scale removal is entirely dispensable. The rate and yield of precipitation depended on the concentration of admixed ammonia and the GP treatment time. Ammonia served as a ligand of calcium, magnesium and ferric central atoms of corresponding salts constituting the hardness. Moreover, ammonia constituting the atmosphere of the treatment was arrested inside aqueous clathrates. So, stabilized ammonia solutions could potentially be utilized as an environmental-friendly nitrogen fertilizer. The precipitate could also be utilized for the same purpose.

scholarly journals Structure and Physicochemical Properties of Water Treated under Methane with Low-Temperature Glow Plasma of Low Frequency

Water ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1638 ◽  
Author(s):  
Aleksandra Ciesielska ◽  
Wojciech Ciesielski ◽  
Karen Khachatryan ◽  
Henryk Koloczek ◽  
Damian Kulawik ◽  
...  
Keyword(s):  
Low Temperature ◽  
Physicochemical Properties ◽  
Treatment Time ◽  
Low Frequency ◽  
Aqueous Solubility ◽  
Physicochemical Characteristics ◽  
Scanning Calorimetry ◽  
Spin Resonance ◽  
Reflectance Ftir ◽  
Glow Plasma

Our former studies delivered a strong evidence that water indirectly treated with low-temperature, low-pressure glow plasma of low frequency (GP) changed its structure depending on the atmosphere in which such treatment was performed (air, ammonia, and nitrogen) and on the time of the treatment (0 to 120 min). In every case, water of different physicochemical characteristics and interesting biological functions was produced. Therefore, the relevant studies were extended to treating deionized water with GP under methane. The resulting samples were characterized by means of ultraviolet/visible (UV/VIS), Fourier transformation infrared-attenuated total reflectance (FTIR-ATR), electron spin resonance (ESR) and Raman spectroscopies, differential scanning calorimetry (DSC), thermogravimetry, pH, conductivity, and refractive index. The generated samples of water had entirely different physicochemical properties from those recorded for water treated with GP in the air and under both ammonia and nitrogen. The treatment of water with GP under methane did not produce clathrates hosting methane molecules. Thermogravimetry delivered an evidence that the treatment with GP increased the aqueous solubility of methane. That solubility non-linearly changed against the treatment time.

Aerodynamic Numerical Investigation of Low-Pressure Steam Turbine Last Stage Under Low Load Conditions With Mode Decomposition Methods

2019 ◽  
Author(s):  
Ping Hu ◽  
Tong Lin ◽  
Rui Yang ◽  
Xiaocheng Zhu ◽  
Zhaohui Du
Keyword(s):  
Steam Turbine ◽  
Frequency Spectrum ◽  
Low Frequency ◽  
Low Pressure ◽  
Unsteady Pressure ◽  
Mode Decomposition ◽  
Low Load ◽  
Last Stage ◽  
Operating Points ◽  
Load Conditions

Abstract It is common that steam turbine works at different operating points, especially under low load conditions, to cater to complex and varied demands for power generation recently. Considering the long and thin shape of last stage moving blades (LSMBs) in a low-pressure (LP) steam turbine, there are many challenges to design a suitable case which balances global efficiency against sufficient structure strength when suffering excitations at low load operating points. In present work, the aim is to extract specific aerodynamic excitations and recognize their distribution and propagation features. Firstly, steady 3D computational fluid dynamics (CFD) calculations are simulated at 25GV and 17GV (25% and 17% of design mass flow conditions) and corresponding unsteady calculations are performed with enough rotor revolutions to obtain integrated flow periodicities. Unsteady pressure signals near tip region of LSMBs are monitored circumferentially in both static and rotating coordinates. The fast Fourier transformation (FFT) results of unsteady pressure signals show that there are broadband humps with small disturbance amplitudes in low frequency spectrum at 25GV, however, a sharp spike is shown in low frequency spectrum at 17GV. Further, circumferential mode decomposition (CMD) method has been applied to distinguish different fluctuations in frequency and the mode numbers and circumferential propagating pace of which have been obtained. Finally, dynamic mode decomposition (DMD) method has been performed to describe detailed mode shapes of featured flow perturbances both in static and rotating coordinate system. These analyses indicate that at 25GV, a band of unsteady responses with very low amplitude was noted which has some features similar to rotating instability (RI). However, distribution and propagation features of flow unsteadiness at 17GV are in good agreement with rotating stall (RS) in compressor.

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