Viability of old house borer (Hylotrupes bajulus) larvae exposed to a constant magnetic field of 98 mT under laboratory conditions

The purpose of our experiment was to establish how exposure to a constant magnetic field of 98 mT affects behavior in terms of viability and larval mass of the old house borer (Hylotrupes bajulus L.). It is demonstrated that larvae exposed to this magnetic field show statistically significant higher viability, as well as a tendency of mass increase in comparison with the control group. These results can be attributed to the modulatory effect of the employed external magnetic field on metabolism and neurohumoral regulation in the insects.

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High Frequency Magnetoimpedance of FeNi/Cu/FeNi Sensitive Elements with Different Geometries

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.152-153.373 ◽

2009 ◽

Vol 152-153 ◽

pp. 373-376 ◽

Cited By ~ 4

Author(s):

Stanislav O. Volchkov ◽

Andrey V. Svalov ◽

G.V. Kurlyandskaya

Keyword(s):

Magnetic Field ◽

Experimental Data ◽

External Magnetic Field ◽

Finite Elements ◽

Magnetic Anisotropy ◽

Constant Magnetic Field ◽

High Frequency ◽

Complex Impedance ◽

Rf Sputtering ◽

Frequency Range

In this work magnetoimpedance (MI) behaviour was studied experimentally for Fe19Ni81(175 nm)/Cu(350 nm)/Fe19Ni81(175 nm) sensitive elements deposited by rf-sputtering. A constant magnetic field was applied in plane of the sandwiches during deposition perpendicular to the Cu-lead in order to induce a magnetic anisotropy. Sandwiches with different width (w) of FeNi parts were obtained. The complex impedance was measured as a function of the external magnetic field for a frequency range of 1 MHz to 700 MHz for MI elements with different geometries. Some of MI experimental data are comparatively analysed with finite elements numerical calculations data. The obtained results can be useful for optimization of the design of miniaturized MI detectors.

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Research on Biological Materials with Effect of Constant Magnetic Field Intervention on Bone Growth and Development in Rabbits

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1003.85 ◽

2014 ◽

Vol 1003 ◽

pp. 85-90

Author(s):

Lin Lv ◽

Jian Hui Yang

Keyword(s):

Magnetic Field ◽

Magnetic Fields ◽

Constant Magnetic Field ◽

Growth And Development ◽

Bone Growth ◽

Biological Materials ◽

Control Group ◽

Experimental Group

To investigate the effect of constant magnetic fields on bone deformation, 16 rabbits were randomly divided into the control group and the experimental group. Biological materials with effect of constant magnetic field were attached to the hind legs of rabbits in the experimental group for a period of 4 months. Rabbit bones were periodically measured and compared. Results showed that compared with the control group, rabbits in the experimental group exhibited significant bone growth, indicating that constant magnetic field may significantly activate bone growth in rabbits.

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Detection and Characterization of Magnetosome Chains In Magnetotactic Bacteria

10.1101/2020.08.20.258723 ◽

2020 ◽

Author(s):

Bharadhwaj Vinay ◽

Bhavya Vijay ◽

Surya K Raghunath

Keyword(s):

Magnetic Field ◽

Electron Microscope ◽

External Magnetic Field ◽

Scanning Electron Microscope ◽

Ferric Chloride ◽

Magnetotactic Bacteria ◽

Coffee Bean ◽

Laboratory Conditions ◽

Growth Of Bacteria ◽

Scanning Electron

AbstractAimMagnetotactic bacteria are gram-negative, prokaryotic organisms which align themselves according to the Earth’s geomagnetic field. They contain organelles called magnetosomes which produce nano-magnetites by the mechanism of biomineralization. These nano-magnetites are arranged in the form of well-ordered chain called magnetosome chain, which are held together by intermolecular forces. The growth of these bacteria is stringent to specific oxygen gradient regions, where there is oxic-anoxic transition zone. In this paper, we report the cultivation and characterisation of magnetotactic bacteria that was accomplished under laboratory conditions and scanning electron microscope respectively.MethodologyBacterial soil samples were collected and cultivated under laboratory conditions using a precise and cost-effective media formulation using coffee bean extract and ferric chloride, which were to provide sufficient iron under the influence of external magnetic field. Experiments were conducted using media, deficient with ferric chloride and coffee bean solution, as control. Pour plate method was carried out for the growth of bacteria under the influence of external magnetic field provided on one-end of the petri-plate.ResultWe observed the growth of the cultivated bacteria in the proximity of the magnetic field only in the presence of iron in media. This emphasises that the media formulated was appropriate for the growth of bacteria under laboratory conditions. Scanning electron microscope analysis confirmed the presence of magnetosome chains in magnetotactic bacteria.InterpretationIn this research, the bacteria were able to sustain in artificial oxygen-transition zones provided in the laboratory. The coffee bean solution contained quinic acid and succinic acid, which along with ferric chloride provided iron in the form of ferric quinate, and succinic acid which are the major sources of growth for the bacteria. Even though magnetosome research has shown promising advances, one of major limitations in its commercialization is its difficulty in cultivation under laboratory conditions.

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Propagators of charged particles in an external magnetic field, expanded over Landau levels

International Journal of Modern Physics A ◽

10.1142/s0217751x15501407 ◽

2015 ◽

Vol 30 (24) ◽

pp. 1550140 ◽

Cited By ~ 3

Author(s):

A. V. Kuznetsov ◽

A. A. Okrugin ◽

A. M. Shitova

Keyword(s):

Magnetic Field ◽

External Magnetic Field ◽

Magnetic Fields ◽

Standard Model ◽

Constant Magnetic Field ◽

Charged Particles ◽

Landau Levels ◽

The Standard Model ◽

First Time

Various forms of expressions for the propagators of charged particles in a constant magnetic field that should be used for investigations of electroweak processes in an external uniform magnetic fields are discussed. Formulas for the propagators of the Standard Model charged [Formula: see text]- and scalar [Formula: see text]-bosons in an arbitrary [Formula: see text]-gauge, expanded over Landau levels, are derived for the first time.

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Features of Martensitic Transformation in Steel during Quenching in a Constant Magnetic Field

Materials Science Forum ◽

10.4028/www.scientific.net/msf.946.304 ◽

2019 ◽

Vol 946 ◽

pp. 304-308 ◽

Cited By ~ 3

Author(s):

Viktor N. Pustovoit ◽

Yuri V. Dolgachev ◽

L.P. Aref'eva

Keyword(s):

Magnetic Field ◽

Martensitic Transformation ◽

External Magnetic Field ◽

Constant Magnetic Field ◽

Electric Resistivity ◽

Nucleation Center ◽

Martensite Formation ◽

Resistivity Method ◽

Elastic Forces ◽

Energy Of Formation

The data on the occurrence of martensitic transformation in steel under the action of a magnetic field were obtained by the electric resistivity method. The obtained data indicate the possibility of stress-assisted martensite formation in the temperature range of Ms-Md (in which superplasticity of austenite is observed). This possibility is due to the magnetic heterogeneity of austenite. Nanosized regions with a ferromagnetic order are present in the paramagnetic matrix. They can perceive the energy of the external magnetic field through the magnetostrictive stresses and change the fields of the elastic forces in the crystal lattice. All this leads to a decrease in the energy of formation of the nucleation center.

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Photovoltaic Generator Based on Laser-Induced Reversible Aggregation of Magnetic Nanoparticles

Zeitschrift für Naturforschung A ◽

10.1515/zna-2019-0247 ◽

2020 ◽

Vol 75 (2) ◽

pp. 171-173 ◽

Cited By ~ 1

Author(s):

Melánia Babincová ◽

Peter Babinec

Keyword(s):

Magnetic Field ◽

Magnetic Nanoparticles ◽

External Magnetic Field ◽

Constant Magnetic Field ◽

Periodic Motion ◽

Electromotive Force ◽

Cluster Formation ◽

Force Generation ◽

Reversible Aggregation ◽

Faraday Law

AbstractA new principle of electromotive force generation is proposed, based on the intermittent laser-induced reversible cluster formation due to the aggregation of magnetic nanoparticles in a ferrofluid placed in the constant magnetic field. In such a configuration, according to Faraday law, in response to unsteady light-induced periodic motion of magnetized materials in an external magnetic field, an alternating current is induced in the coil wrapped around the ferrofluid tube.

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