Effects of a 50-Hz sinusoidal magnetic field on the dielectric properties of chick embryo myoblasts

In the linear and planar motors, the 1D Halbach magnet array is extensively used. The sinusoidal property of the magnetic field deteriorates by analyzing the magnetic field at a small air gap. Therefore, a new 1D Halbach magnet array is proposed, in which the permanent magnet with a curved surface is applied. Based on the superposition of principle and Fourier series, the magnetic flux density distribution is derived. The optimized curved surface is obtained and fitted by a polynomial. The sinusoidal magnetic field is verified by comparing it with the magnetic flux density of the finite element model. Through the analysis of different dimensions of the permanent magnet array, the optimization result has good applicability. The force ripple can be significantly reduced by the new magnet array. The effect on the mass and air gap is investigated compared with a conventional magnet array with rectangular permanent magnets. In conclusion, the new magnet array design has the scalability to be extended to various sizes of motor and is especially suitable for small air gap applications.

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A 60-Hz sinusoidal magnetic field induces apoptosis of prostate cancer cells through reactive oxygen species

International Journal of Radiation Biology ◽

10.1080/09553000802460206 ◽

2008 ◽

Vol 84 (11) ◽

pp. 945-955 ◽

Cited By ~ 34

Author(s):

Eui Kwan Koh ◽

Byung-Kyu Ryu ◽

Dong-Young Jeong ◽

Iel-Soo Bang ◽

Myung Hee Nam ◽

...

Keyword(s):

Magnetic Field ◽

Prostate Cancer ◽

Reactive Oxygen Species ◽

Cancer Cells ◽

Reactive Oxygen ◽

Oxygen Species ◽

Prostate Cancer Cells ◽

Sinusoidal Magnetic Field

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Dielectric properties of Shell oil transformer oil with impurities of carbon nanotubes and fullerene C60

Semiconductor Physics Quantum Electronics & Optoelectronics ◽

10.15407/spqeo24.04.413 ◽

2021 ◽

Vol 24 (04) ◽

pp. 413-418

Author(s):

O.V. Kovalchuk ◽

◽

I.P. Studenyak ◽

T.M. Kovalchuk ◽

E.A. Ayryan ◽

...

Keyword(s):

Magnetic Field ◽

Carbon Nanotubes ◽

Electrical Conductivity ◽

Dielectric Properties ◽

Fullerene C60 ◽

Transformer Oil ◽

C60 Fullerene ◽

Cooling Efficiency ◽

Fullerene Concentration ◽

Multiwall Nanotubes

At the temperature 293 K, the influence of two types of nanoimpurities (carbon multiwall nanotubes and C60 fullerene) both separately and together on the dielectric properties of Shell oil transformer oil has been studied. It has been shown that these impurities do not significantly effect on the value of the dielectric permittivity of Shell oil, but more significantly increase its conductivity. It has been found that in the presence of nanotubes inside Shell oil, the dependence of its electrical conductivity on the fullerene concentration is nonmonotonic. The samples with the fullerene concentration 100 ppm have the highest conductivity. At the fullerene concentration 300 ppm, the conductivity of Shell oil with the impurities of carbon nanotube and C60 fullerene becomes almost equal to the electrical conductivity of Shell oil only with the impurities of carbon nanotubes. It has been suggested that C60 fullerene can be used to reduce the electrical conductivity of Shell oil with magnetic nanoparticles required to increase the cooling efficiency of transformers under the action of their own magnetic field.

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Influence of a 50 Hz Sinusoidal Magnetic Field on Sea Urchin Embryogenesis

Electricity and Magnetism in Biology and Medicine ◽

10.1007/978-1-4615-4867-6_129 ◽

1999 ◽

pp. 545-547 ◽

Cited By ~ 2

Author(s):

Olga Zeni ◽

Maria Rosaria Scarfì ◽

Marco Della Noce ◽

Francesco La Cara ◽

Ferdinando Bersani ◽

...

Keyword(s):

Magnetic Field ◽

Sea Urchin ◽

Sinusoidal Magnetic Field

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Magnetic field intensity andγ-Fe2O3concentration effects on the dielectric properties of magnetodielectric tissues

Materials Science and Engineering B ◽

10.1016/j.mseb.2018.11.014 ◽

2018 ◽

Vol 236-237 ◽

pp. 125-131 ◽

Cited By ~ 10

Author(s):

I. Bica ◽

E.M. Anitas

Keyword(s):

Magnetic Field ◽

Dielectric Properties ◽

Field Intensity ◽

Magnetic Field Intensity

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The Magnetoelectric Effect of a Ni0.3Zn0.62Cu0.08Fe2O4 - PbFe0.5Nb0.5O3 Multilayer Composite

Archives of Metallurgy and Materials ◽

10.2478/amm-2014-0169 ◽

2014 ◽

Vol 59 (3) ◽

pp. 1011-1015

Author(s):

P. Guzdek ◽

M. Sikora ◽

Ł. Góra ◽

Cz. Kapusta

Keyword(s):

Magnetic Field ◽

Magnetoelectric Effect ◽

Magnetic Hysteresis ◽

Tape Casting ◽

Casting Process ◽

Layered Composites ◽

Practical Applications ◽

Magnetoelectric Composite ◽

Sinusoidal Magnetic Field ◽

Magnetoelectric Coefficient

Abstract The magnetoelectric effect in multiferroic materials has been widely studied for its fundamental interest and practical applications. The magnetoelectric effect observed for single phase materials like Cr2O3, BiFeO3, and Pb(Fe0.5Nb0.5)O3 is usually small. A much larger effect can be obtained in composites consisting of magnetostrictive and piezoelectric phases. This paper investigates the magnetoelectric effect of a multilayer (laminated) structure consisting of 6 nickel ferrite and 7 PFN relaxor layers. It describes the synthesis and tape casting process for Ni0.3Zn0.62Cu0.08Fe2O4 ferrite and relaxor PbFe0.5Nb0.5O3 (PFN). Magnetic hysteresis, ZFC - FC curves and dependencies of magnetization versus temperature for PFN relaxor and magnetoelectric composite were measured with a vibrating sample magnetometer (VSM) in an applied magnetic field up to 85 kOe at a temperature range of 10 – 400 K. Magnetoelectric effect at room temperature was investigated as a function of a static magnetic field (0.3 - 6.5 kOe) and the frequency of sinusoidal magnetic field (0.01 - 6.5 kHz). At lower magnetic field, the magnetoelectric coefficient increases slightly before reaching a maximum and then decreases. The magnetoelectric coefficient aME increases continuously as the frequency is raised, although this increase is less pronounced in the 1-6.5 kHz range. Maximum values of the magnetoelectric coefficient attained for the layered composites exceed about 50 mV/(Oe cm).

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Sinusoidal magnetic field stimulates magnetosome formation and affects mamA, mms13, mms6, and magA expression in Magnetospirillum magneticum AMB-1

Canadian Journal of Microbiology ◽

10.1139/w08-095 ◽

2008 ◽

Vol 54 (12) ◽

pp. 1016-1022 ◽

Cited By ~ 1

Author(s):

Xiaoke Wang ◽

Likun Liang ◽

Tao Song ◽

Longfei Wu

Keyword(s):

Magnetic Field ◽

Geomagnetic Field ◽

Biomedical Applications ◽

Magnetic Particles ◽

Industrial Sector ◽

Magnetic Pole ◽

Variable Intensity ◽

New Approach ◽

Sinusoidal Magnetic Field ◽

Magnetospirillum Magneticum

Magnetic particles are currently one of the most important materials in the industrial sector, where they have been widely used for biotechnological and biomedical applications. To investigate the effects of the imposed magnetic field on biomineralization in Magnetospirillum magneticum AMB-1 and to suggest a new approach that enhances formation of magnetosomes, cultures inoculated with either magnetic or nonmagnetic precultures were incubated under a sinusoidal magnetic field or geomagnetic field. The results showed that the sinusoidal magnetic field up-regulated mms6 expression in the cultures inoculated with magnetic cells, and magA, mms6, and mamA expression in the cultures inoculated with nonmagnetic cells. The applied sinusoidal magnetic field could block cell division, which could contribute to a decrease in the OD600 values and an increase in the coefficient of magnetism values of the cultures, which could mean that the percentage of mature magnetosome-containing bacteria was increased. The linearity of magnetosome chains was affected, but the number of magnetic particles in cells was increased when a sinusoidal magnetic field was applied to the cultures. The results imply that the variable intensity and orientation of the sinusoidal magnetic field resulted in magnetic pole conversion in the newly forming magnetic particles, which could affect the formation of magnetic crystals and the arrangement of the adjacent magnetosome.

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