Influence of magnetic field on sowing quality of flax seeds

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 %.

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

Energy and automation ◽

10.31548/energiya2021.04.018 ◽

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

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Influence of magnetic field on sowing qualities of oat seeds

Energy and automation ◽

10.31548/energiya2020.03.018 ◽

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.

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

10.1101/317115 ◽

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.

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

Physical Review A ◽

10.1103/physreva.82.061602 ◽

2010 ◽

Vol 82 (6) ◽

Cited By ~ 41

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

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On Geometrical Invariants of the Magnetic Field Gradient Tensor in Turbulent Space Plasmas: Scale Variability in the Inertial Range

The Astrophysical Journal ◽

10.3847/1538-4357/ab1e47 ◽

2019 ◽

Vol 878 (2) ◽

pp. 124 ◽

Cited By ~ 1

Author(s):

Virgilio Quattrociocchi ◽

Giuseppe Consolini ◽

Maria Federica Marcucci ◽

Massimo Materassi

Keyword(s):

Magnetic Field ◽

Field Gradient ◽

Magnetic Field Gradient ◽

Inertial Range ◽

Space Plasmas ◽

Gradient Tensor ◽

The Magnetic Field

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Effects of the magnetic field gradient on the wall power deposition of Hall thrusters

Journal of Plasma Physics ◽

10.1017/s0022377817000241 ◽

2017 ◽

Vol 83 (2) ◽

Cited By ~ 2

Author(s):

Yongjie Ding ◽

Peng Li ◽

Xu Zhang ◽

Liqiu Wei ◽

Hezhi Sun ◽

...

Keyword(s):

Magnetic Field ◽

Field Gradient ◽

Discharge Channel ◽

Magnetic Field Gradient ◽

Zero Magnetic Field ◽

Power Deposition ◽

Neutral Gas ◽

Channel Exit ◽

Ionization Region ◽

The Magnetic Field

The effect of the magnetic field gradient in the discharge channel of a Hall thruster on the ionization of the neutral gas and power deposition on the wall is studied through adopting the 2D-3V particle-in-cell (PIC) and Monte Carlo collisions (MCC) model. The research shows that by gradually increasing the magnetic field gradient while keeping the maximum magnetic intensity at the channel exit and the anode position unchanged, the ionization region moves towards the channel exit and then a second ionization region appears near the anode region. Meanwhile, power deposition on the walls decreases initially and then increases. To avoid power deposition on the walls produced by electrons and ions which are ionized in the second ionization region, the anode position is moved towards the channel exit as the magnetic field gradient is increased; when the anode position remains at the zero magnetic field position, power deposition on the walls decreases, which can effectively reduce the temperature and thermal load of the discharge channel.

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

Energy and automation ◽

10.31548/energiya2021.01.017 ◽

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.

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MEASUREMENT AND MODELLING OF GRADIENT MAGNETIC FIELDS FOR BIO-CHEMICAL SEPARATION PROCESSES

International Journal of Engineering Science Technologies ◽

10.29121/ijoest.v5.i2.2021.174 ◽

2021 ◽

Vol 5 (2) ◽

pp. 69-80

Author(s):

Hatice Bilgili ◽

Teymuraz Abbasov ◽

Yusuf Baran

Keyword(s):

Magnetic Field ◽

Magnetic Fields ◽

Field Gradient ◽

Permanent Magnets ◽

Magnetic Field Gradient ◽

Chemical Separation ◽

Submicron Particles ◽

Separation Processes ◽

Measuring Device ◽

The Magnetic Field

Separation processes are widely used in chemical and biotechnical processes. Especially biomagnetic separation is an important issue among effective separation processes to separate the magnetic micron and submicron particles. It is necessary to establish and determine a high magnetic field or field gradient in the separation cell. However, it is not easy to determine the magnetic field gradient in the working region for different separation in practice. The reason for these difficulties is that the magnetic cells used in biochemical separation have different geometries and there are no simple and useful systems to easily measure these magnetic fields. Two main objectives are aimed in this study. First, a simple measuring device design can measure gradient magnetic fields with high precision of about 0,01mm and, secondly, obtain simple empirical expressions for the magnetic field. A magnetometer with Hall probes that works with the 3D printer principle was designed and tested to measure the magnetic field. Magnetic field changes were measured according to the surface coordinates on the measurement platform or measuring cell. Numerous experimental measurements of gradient magnetic fields generated by permanent magnets have been taken. The results obtained from the studies and results from the proposed empirical models were compared.

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Analytical and Experimental Study of Magnetomechanical Properties of Magnetic Porous PDMS Sponge Under Non-Uniform Magnetic Fields

Journal of Applied Mechanics ◽

10.1115/1.4047178 ◽

2020 ◽

Vol 87 (8) ◽

Author(s):

Ali Shademani ◽

Mu Chiao

Keyword(s):

Magnetic Field ◽

Mechanical Properties ◽

Experimental Study ◽

Magnetic Fields ◽

Field Gradient ◽

Magnetic Field Gradient ◽

Experimental Methods ◽

Compression Tests ◽

Magnetomechanical Coupling ◽

The Magnetic Field

Abstract Magnetic elastomers (MEs) respond to an applied magnetic field through magnetomechanical coupling, where the mechanical properties of the MEs change with magnetic field strength. These phenomena have been mostly studied under homogenous magnetic fields due to the simplicity. In this work, the effects of the magnetic field gradient on the mechanical properties and the response of the MEs was examined. MEs are made by embedding carbonyl iron microparticles (CI) into a polydimethylsiloxane (PDMS) matrix, which is later rendered porous. The influence of the CI concentration was investigated by manipulating four different samples with CI/PDMS weight ratios of 0.2, 0.6, 1.0, and 1.4. An analytical method was proposed to further understand the interactions of the magnetic field gradient and the material’s response. The proposed theory was later verified with experimental results from compression tests in the presence of different magnetic fields. The proposed theoretical framework and experimental methods can be used to improve the design of MEs in the future.

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