scholarly journals Influence of magnetic field on change of activation energy during pre-sowing seed treatment

2020 ◽  
pp. 17-25
Author(s):  
V. Savchenko ◽  
◽  
O. Synyavsky ◽  
D. Rosengart ◽  
V. Bunko ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Activation Energy ◽  
Magnetic Induction ◽  
Seed Treatment ◽  
Crop Yields ◽  
Magnetic Field Gradient ◽  
Agricultural Crops ◽  
Experimental Planning ◽  
Sowing Seed ◽  
The Magnetic Field

It is possible to increase crop yields and product quality through the use of electrophysical methods of pre-sowing seed treatment, among which pre-sowing seed treatment in a magnetic field is promising. For successful introduction of magnetic seed treatment in production it is necessary to establish mode parameters of treatment and their optimum values. To do this, it is necessary to establish the effect of the magnetic field on the change in activation energy during pre-sowing seed treatment. The aim of the study was to determine the change in activation energy during pre-sowing treatment of crop seeds in a magnetic field. To determine the change in the activation energy, the change in the biopotential of the seed during its treatment in a magnetic field was experimentally investigated by the experimental planning method. It was found that the change in seed biopotential depends on the square of the magnetic induction and the velocity of the seed in a magnetic field. An analytical expression was obtained that relates the change in activation energy to the change in seed biopotential, which made it possible to establish the dependence of the change in activation energy on the treatment parameters. It was found that the greatest seed biopotential and activation energy change at a magnetic induction of 0.065 T, a magnetic field gradient of 0.57 T/m and a velocity of 0.4 m/s. Under this mode of pre-sowing seed treatment of agricultural crops, the activation energy changes by 3.1 - 5.7 kJ/g-eq.

scholarly journals Influence of magnetic field on sowing qualities of oat seeds

2020 ◽  
pp. 18-25
Author(s):  
V. Savchenko ◽  
◽  
A. Synyavsky ◽  
V. Bunko ◽  
I. Gvozdyk ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Field Gradient ◽  
Magnetic Induction ◽  
Crop Yields ◽  
Magnetic Field Gradient ◽  
Experimental Studies ◽  
Experimental Planning ◽  
Oat Seeds ◽  
Positive Effect ◽  
The Magnetic Field

Ensuring an increase in crop yields and a reduction in plant morbidity without the use of chemicals is an important task. Currently, many researchers have found a positive effect of a constant magnetic field on crop seeds during pre-sowing treatment, which is manifested in increasing crop yields, reducing plant morbidity, improving biochemical parameters and product quality. The aim of the study was to establish the influence of the magnetic field on the sowing qualities of oat seeds during pre-sowing treatment. Experimental studies of the effect of the magnetic field on the germination energy and seed germination were performed with oat seeds of the Desnyansky variety by the experimental planning method. It has been established that the rate of chemical reactions, ion transport, membrane permeability, seed water absorption and oxygen concentration in cells increase during seed treatment in a magnetic field, which contributes to the improvement of seed sowing qualities. It is established that the change of sowing qualities of seeds during their treatment in a magnetic field depends on the square of magnetic induction, the magnetic field gradient and the seed velocity. The most effective mode of pre-sowing treatment of oat seeds in a magnetic field is a magnetic induction of 0,065 T with fourfold re-magnetization, a magnetic field gradient of 0,57 T/m and a velocity of 0,4 m/s.

Energy-Saving Technologies for Pre-Sowing Seed Treatment in a Magnetic Field

2020 ◽  
pp. 213-242
Author(s):  
Volodymyr Kozyrskiy ◽  
Vitaliy Savchenko ◽  
Oleksandr Sinyavsky ◽  
Vasyl Bunko
Keyword(s):  
Magnetic Field ◽  
Seed Treatment ◽  
Crop Yields ◽  
Plant Cells ◽  
Magnetic Treatment ◽  
Movement Speed ◽  
Design Parameters ◽  
Concentration Of Ions ◽  
Sowing Seed ◽  
The Magnetic Field

The purpose of the research was to establish the mechanism of the magnetic field impact on seeds to determine the most effective mode of pre-sowing treatment of seeds in a magnetic field and design parameters of the device for magnetic treatment of seeds. It is established that under the influence of a magnetic field the rate of chemical reactions occurring in plant cells is accelerated, solubility of salts and acids increases, and permeability of cell membranes accelerates the diffusion of molecules and ions through them. This leads to an increase in the concentration of ions in the cell and oxygen molecules and the growth of water absorption of seeds. Pre-sowing seed treatment promotes increased germination by 25-40%, and germination by 30 - 35%. The most effective pre-sowing treatment of seeds in a magnetic field is a magnetic induction of 0.065 Tl with four reversal magnetization, a pole division of 0.23 m and a seed movement speed of 0.4 m/s. With this mode of treatment, crop yields increase by 20–25%.

scholarly journals Change of activation energy after magnetic field in pre-sowing seed treatment

2018 ◽  
Vol 2018 (3) ◽  
pp. 106-112
Author(s):  
V. SAVCHENKO ◽  
◽  
O. SINYAVSKY ◽  
V. IVASHCHUK ◽  
◽  
...  
Keyword(s):  
Magnetic Field ◽  
Activation Energy ◽  
Seed Treatment ◽  
Sowing Seed

Influence of magnetic field on sowing quality of flax seeds

2021 ◽  
pp. 18-25
Author(s):  
V. Savchenko ◽  
◽  
А. Sinyavsky ◽  
I. Bolbot ◽  
◽  
...  
Keyword(s):  
Magnetic Field ◽  
Field Gradient ◽  
Magnetic Induction ◽  
Magnetic Field Gradient ◽  
Movement Velocity ◽  
Lower Velocity ◽  
Ion Transport Membrane ◽  
Flax Seeds ◽  
The Magnetic Field

The use of pre-sowing treatment of flax seeds in a magnetic field makes it possible to increase yields, reduce plant morbidity, increase their biochemical parameters and product quality. When treatment flax seeds in a magnetic field, the rate of chemical reactions, ion transport, membrane permeability, seed water absorption and oxygen concentration in the cells increase, which contributes to the improvement of seed sowing qualities. It is established that the change of sowing qualities of flax seeds during their treatment in a magnetic field depends on the square of magnetic induction, the gradient of the magnetic field and the movement velocity of seeds. With a change in magnetic induction from 0 to 0.065 T germination energy and germination of flax seeds increase, and with a further increase in magnetic induction begin to decrease. The change in sowing qualities of flax seeds is influenced by the velocity of their movement in the magnetic field and the gradient of the magnetic field, although they are less significant factors than magnetic induction. The best results were at lower velocity values and a larger magnetic field gradient. The most effective mode of pre-sowing treatment of flax seeds in a magnetic field is a magnetic induction of 0.065 T with four-fold re-magnetization, a magnetic field gradient of 0.57 T/m and a velocity of 0.4 m/s. With this mode of pre-sowing treatment of flax seeds in a magnetic field, the energy of seed germination increased by 30 % compared to the control, and germination - by 26 %.

Influence of pre-sowing treatment of flax seeds in a magnetic field on biometric indices of plants

2021 ◽  
pp. 18-26
Author(s):  
V. Savchenko ◽  
◽  
А. Sinyavsky ◽  
V. Bunko ◽  
◽  
...  
Keyword(s):  
Magnetic Field ◽  
Field Gradient ◽  
Magnetic Induction ◽  
Magnetic Field Gradient ◽  
Growth Curves ◽  
Ion Transport Membrane ◽  
Flax Seeds ◽  
Positive Effect ◽  
The Magnetic Field ◽  
Biometric Indices

Pre-sowing treatment of flax seeds in a magnetic field increases its yield, reduces plant morbidity, improves their biochemical parameters and product quality. Under the action of the magnetic field, the rate of chemical and biochemical reactions in flax seeds, solubility of salts and acids, biopotential, ion transport, membrane permeability, seed water absorption and oxygen concentration in cells increases, which has a positive effect on plant growth and development. It is established that the change in the biometric parameters of flax during pre-sowing treatment of seeds in a magnetic field depends on the square of the magnetic induction, the gradient of the magnetic field and the velocity of the seeds. Based on the experimentally obtained growth curves of flax plants, it can be concluded that during pre-sowing treatment of seeds in a magnetic field, plants have the best biometric indicators throughout the growing season. The best biometric indicators were in plants whose seeds were treatment in a magnetic field with a magnetic induction of 0.065 T, with four-fold re-magnetization, a magnetic field gradient of 0.57 T / m (pole division of 0.23 m) and a seed velocity of 0.4 m/s. Under this mode of pre-sowing treatment of seeds in a magnetic field, the length of flax stalks increased by 10.5 %, straw yield - by 0.7 t/ ha, seeds - 0.79 t/ ha. Key words: flax, seeds, magnetic induction, seed velocity, magnetic field gradient, plant biometrics

The activation energy U(T,B) in high temperature superconductor

2020 ◽  
Vol 92 (2) ◽  
pp. 20601
Author(s):  
Abdelaziz Labrag ◽  
Mustapha Bghour ◽  
Ahmed Abou El Hassan ◽  
Habiba El Hamidi ◽  
Ahmed Taoufik ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Activation Energy ◽  
Phase Diagram ◽  
High Temperature ◽  
Apparent Activation Energy ◽  
High Temperature Superconductor ◽  
Flux Flow ◽  
Resistivity Measurements ◽  
Vortex Phase ◽  
The Magnetic Field

It is reported in this paper on the thermally assisted flux flow in epitaxial YBa2Cu3O7-δ deposited by Laser ablation method on the SrTiO3 substrate. The resistivity measurements ρ (T, B) of the sample under various values of the magnetic field up to 14T in directions B∥ab-plane and B∥c-axis with a dc weak transport current density were investigated in order to determine the activation energy and then understand the vortex dynamic phenomena and therefore deduce the vortex phase diagram of this material. The apparent activation energy U0 (B) calculated using an Arrhenius relation. The measured results of the resistivity were then adjusted to the modified thermally assisted flux flow model in order to account for the temperature-field dependence of the activation energy U (T, B). The obtained values from the thermally assisted activation energy, exhibit a behavior similar to the one showed with the Arrhenius model, albeit larger than the apparent activation energy with ∼1.5 order on magnitude for both cases of the magnetic field directions. The vortex glass model was also used to obtain the vortex-glass transition temperature from the linear fitting of [d ln ρ/dT ] −1 plots. In the course of this work thanks to the resistivity measurements the upper critical magnetic field Hc2 (T), the irreversibility line Hirr (T) and the crossover field HCrossOver (T) were located. These three parameters allowed us to establish a phase diagram of the studied material where limits of each vortex phase are sketched in order to optimize its applicability as a practical high temperature superconductor used for diverse purposes.

scholarly journals Remote manipulation of magnetic nanoparticles using magnetic field gradient to promote cancer cell death

2018 ◽  
Author(s):  
Mahendran Subramanian ◽  
Arkadiusz Miaskowski ◽  
Stuart Iain Jenkins ◽  
Jenson Lim ◽  
Jon Dobson
Keyword(s):  
Magnetic Field ◽  
Magnetic Nanoparticles ◽  
Field Gradient ◽  
Biomedical Applications ◽  
Magnetic Field Gradient ◽  
Field Source ◽  
Remote Manipulation ◽  
Cancer Cell Death ◽  
The Magnetic Field

AbstractThe manipulation of magnetic nanoparticles (MNPs) using an external magnetic field, has been demonstrated to be useful in various biomedical applications. Some techniques have evolved utilizing this non-invasive external stimulus but the scientific community widely adopts few, and there is an excellent potential for more novel methods. The primary focus of this study is on understanding the manipulation of MNPs by a time-varying static magnetic field and how this can be used, at different frequencies and displacement, to manipulate cellular function. Here we explore, using numerical modeling, the physical mechanism which underlies this kind of manipulation, and we discuss potential improvements which would enhance such manipulation with its use in biomedical applications, i.e., increasing the MNP response by improving the field parameters. From our observations and other related studies, we infer that such manipulation depends mostly on the magnetic field gradient, the magnetic susceptibility and size of the MNPs, the magnet array oscillating frequency, the viscosity of the medium surrounding MNPs, and the distance between the magnetic field source and the MNPs. Additionally, we demonstrate cytotoxicity in neuroblastoma (SH-SY5Y) and hepatocellular carcinoma (HepG2) cells in vitro. This was induced by incubation with MNPs, followed by exposure to a magnetic field gradient, physically oscillating at various frequencies and displacement amplitudes. Even though this technique reliably produces MNP endocytosis and/or cytotoxicity, a better biophysical understanding is required to develop the mechanism used for this precision manipulation of MNPs, in vitro.

scholarly journals Magnetorheological Fluids Behaviour in Oscillatory Compression Squeeze: Experimental Testing and Analysis

2019 ◽  
Vol 13 (4) ◽  
pp. 221-225
Author(s):  
Wojciech Horak ◽  
Marcin Szczęch ◽  
Bogdan Sapiński
Keyword(s):  
Magnetic Field ◽  
Volume Fraction ◽  
Experimental Testing ◽  
Magnetic Field Gradient ◽  
Particle Volume Fraction ◽  
Excitation Frequency ◽  
Magnetorheological Fluid ◽  
Density Level ◽  
Particle Volume ◽  
The Magnetic Field

Abstract This article deals with experimental testing of magnetorheological fluid (MRF) behaviour in the oscillatory squeeze mode. The authors investigate and analyse the influence of excitation frequency and magnetic field density level on axial force in MRFs that differ in particle volume fraction. The results show that, under certain conditions, the phenomenon of self-sealing can occur as a result of the magnetic field gradient and a vacuum in the working gap of the system.

Precisely mapping the magnetic field gradient in vacuum with an atom interferometer

2010 ◽  
Vol 82 (6) ◽  
Author(s):  
Min-Kang Zhou ◽  
Zhong-Kun Hu ◽  
Xiao-Chun Duan ◽  
Bu-Liang Sun ◽  
Jin-Bo Zhao ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Field Gradient ◽  
Magnetic Field Gradient ◽  
Atom Interferometer ◽  
The Magnetic Field

The Magnetic Treatment of Water Solutions and Seeds of Agricultural Crops

2019 ◽  
pp. 256-292 ◽  
Author(s):  
Volodymyr Kozyrskyi ◽  
Mykola Zablodskiy ◽  
Vitaliy Savchenko ◽  
Oleksandr Sinyavsky ◽  
Rauf Yuldashev ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Energy Saving ◽  
Chemical Reactions ◽  
Magnetic Induction ◽  
Magnetic Treatment ◽  
Agricultural Crops ◽  
Water Solutions ◽  
Material Resources ◽  
Presowing Treatment ◽  
A Cell

The reclamation of new areas and distant lands with limited energy and material resources demands using resource- and energy-saving technologies. One of such technologies can be magnetic treatment of irrigating water and artificial manure solutions, and presowing treatment of seeds of agricultural crops in magnetic field. The authors found that magnetic field accelerates the velocity of chemical reactions, enhances salts and fertilizers solvability, and increases oxygen concentration in a solution. Magnetic field improves membrane cells permeability which accelerates molecules and ions diffusion through it. This process improves the ability of a seed to absorb water and increases the concentration of oxygen in a cell. Presowing treatment of seeds increases their ability of germination by 26–50%, sprouting by 20–30%. The best regime of water solutions and seeds of agricultural crops treatment in magnetic field is when magnetic induction is 0.065 Tl and the velocity of a solution is 0.4 m/s.

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