scholarly journals Changes in infectious titer of Black sea algal virus of the microalgae tetraselmis viridis under the influence of a constant magnetic field

2020 ◽  
pp. 35-39
Author(s):  
O.A. Stepanova ◽  
◽  
P.V. Gaisky ◽  
S.A. Sholar ◽  
◽  
...  
Keyword(s):  
Magnetic Field ◽  
Black Sea ◽  
Magnetic Induction ◽  
Constant Magnetic Field ◽  
Algal Virus ◽  
Infectious Titer ◽  
Algal Viruses ◽  
Order Of Magnitude ◽  
Tetraselmis Viridis

In three experiments aimed at studying the effect of a constant magnetic field with a magnetic induction of 600 G and a duration of experiments of 24 and 36 h, it was found that with a low initial titer of the algal virus of the microalgae Tetraselmis viridis, its stay in a magnetic field for 24 h led to an increase in the infectious titer by one order of magnitude. However, when the virus with a higher infectious titer was in a magnetic field for 24 h, no changes in the titer were observed, and after 36 h, its decrease by one order of magnitude was recorded. The results obtained indicate the need for further research in this direction, with using a wider range of algal viruses.

scholarly journals Selective sensitivity of the Black Sea microalgae to viral infection after exposure to a constant magnetic field

2021 ◽  
pp. 31-38
Author(s):  
O.A. Stepanova ◽  
◽  
P.V. Gaisky ◽  
S.A. Sholar ◽  
◽  
...  
Keyword(s):  
Magnetic Field ◽  
Viral Infection ◽  
Black Sea ◽  
Phaeodactylum Tricornutum ◽  
The Black Sea ◽  
Viral Lysis ◽  
Laboratory Installation ◽  
Species Characteristics ◽  
Selective Sensitivity ◽  
Tetraselmis Viridis

The change in sensitivity to viral infection of cultures of three species of Black Sea microalgae (Tetraselmis viridis, Dunaliella viridis and Phaeodactylum tricornutum) after exposure to a constant unidirectional magnetic field with a magnetic induction of 600 G is experimentally studied. The studies were carried out with using a developed laboratory installation. With the duration of the experiments 24 h and 48 h, it was recorded that being in a magnetic field resulted in an increase in the resistance to viral lysis in microalgae T. viridis, its decrease in P. tricornutum and no changes in D. viridis. We assume that the revealed changes in the sensitivity of microalgae to viral infection after exposure to a magnetic field are due to their species characteristics and selectivity.

Some magnetic properties of metals - III. Diamagnetic resonance

1952 ◽  
Vol 212 (1108) ◽  
pp. 38-47 ◽  
Keyword(s):  
Magnetic Field ◽  
Magnetic Properties ◽  
Electromagnetic Radiation ◽  
Effective Mass ◽  
Constant Magnetic Field ◽  
Skin Effect ◽  
Resonance Absorption ◽  
Large System ◽  
Radiation Incident ◽  
Order Of Magnitude

It is shown that electromagnetic radiation incident on a large system of electrons moving in a constant magnetic field H in a metal is strongly absorbed near a frequency v = eH /2 πmc , where m is the effective mass. The resonance absorption is found to be of the same order of magnitude as the absorption due to the skin effect.

A Central Force Oscillating in Time Caused by a Linear Change in Time of the Magnetic Induction

2003 ◽  
Vol 58 (4) ◽  
pp. 211-216
Author(s):  
S. Olszewski
Keyword(s):  
Magnetic Field ◽  
Charged Particle ◽  
Magnetic Induction ◽  
Constant Magnetic Field ◽  
Central Force ◽  
Planar Motion ◽  
Centripetal Force ◽  
Linear Change

A charged particle in its planar motion in a constant magnetic field is submitted a centripetal force acting on that particle. The amplitude of this force is constant in time. In this paper it is demonstrated that by a linear change in time of the magnetic induction another centripetal force acting on the particle is created. This force has an amplitude oscillating in time with the frequency equal to that of the particle gyration.

scholarly journals Modification of the Properties of Polymer Composites in a Constant Magnetic Field Environment

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 3806
Author(s):  
Ewa Miękoś ◽  
Michał Cichomski ◽  
Marek Zieliński ◽  
Tomasz Klepka ◽  
Dariusz Sroczyński ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Polymer Composites ◽  
Magnetic Induction ◽  
Constant Magnetic Field ◽  
Chemical Properties ◽  
Crystalline Cellulose ◽  
Field Environment ◽  
Value Changes ◽  
Physical And Chemical ◽  
The Impact

In this paper, polymer composites based on polylactide (PLA) and epoxy resin (Epidian 5) were studied in terms of the influence of magnetic induction on their changes in physicochemical properties. The composites contained admixtures in the form of magnetite (Fe3O4) and crystalline cellulose (Avicel PH-1010) in the amount of 10%, 20%, and 30% by weight and starch in the amount of 10%. The admixtures of cellulose and starch were intended to result in the composites becoming biodegradable biopolymers to some extent. Changes in physical and chemical properties due to the impact of a constant magnetic field with a magnetic induction value B = 0.5 T were observed. The changes were observed during tests of tensile strength, bending, impact strength, water absorbency, frost resistance, chemical resistance to acids and bases, as well as through SEM microscopy and with studies of the composition of the composites that use the EDS method and of their structure with the XRD method. Based on the obtained results, it was found that the magnetic induction value changes the properties of composites. This therefore acts as one method of receiving new alternative materials, the degradation of which in the environment would take far less time.

Analysis of magneto rheological elastomers for energy harvesting systems

2020 ◽  
Vol 64 (1-4) ◽  
pp. 439-446
Author(s):  
Gildas Diguet ◽  
Gael Sebald ◽  
Masami Nakano ◽  
Mickaël Lallart ◽  
Jean-Yves Cavaillé
Keyword(s):  
Magnetic Field ◽  
Energy Harvesting ◽  
Shear Strain ◽  
Magnetic Induction ◽  
Magnetic Particles ◽  
Homogeneous Magnetic Field ◽  
Electrical Signal ◽  
Harvesting Systems ◽  
Dc Bias ◽  
Magneto Rheological

Magneto Rheological Elastomers (MREs) are composite materials based on an elastomer filled by magnetic particles. Anisotropic MRE can be easily manufactured by curing the material under homogeneous magnetic field which creates column of particles. The magnetic and elastic properties are actually coupled making these MREs suitable for energy conversion. From these remarkable properties, an energy harvesting device is considered through the application of a DC bias magnetic induction on two MREs as a metal piece is applying an AC shear strain on them. Such strain therefore changes the permeabilities of the elastomers, hence generating an AC magnetic induction which can be converted into AC electrical signal with the help of a coil. The device is simulated with a Finite Element Method software to examine the effect of the MRE parameters, the DC bias magnetic induction and applied shear strain (amplitude and frequency) on the resulting electrical signal.

A CMT Device for Electric Energy Meter Detection

2020 ◽  
Vol 13 ◽  
Author(s):  
Zhi Zeng ◽  
Yongfu Zhou
Keyword(s):  
Magnetic Field ◽  
Constant Magnetic Field ◽  
Electromagnetic Interference ◽  
Production Efficiency ◽  
Electric Energy ◽  
Labor Cost ◽  
Automatic Testing ◽  
National Standard ◽  
Measurement Instruments ◽  
Detection Technology

Background: Detection technology is a product development technique that serves as a basis for quality assurance. As electric energy meters (EEMs) are measurement instruments whose use is mandatory in several nations, their accuracy, which directly depends on their reliability and proper functioning, is paramount. In this study, to eliminate electromagnetic interference, a device is developed for testing a set of EEMs under a constant magnetic field interference. The detection device can simultaneously test 6 electric meters; moreover, in the future, it will be able to measure the influence of magnetic field strength on the measurement accuracy of EEMs, thereby improving the production efficiency of electric meter manufacturers. Methods: In this study, we first design a 3D model of the detection device for a single meter component; then, we establish a network, which includes a control system, and perform the planning of the path of a block that generates a constant magnetic field. Finally, we control the three-axis motion and rotation of the block using a PLC to implement detection for the five sides of the EEM. Results & Discussion: The proposed device can accurately determine whether an EEM can adequately function, within the error range prescribed by a national standard, under electromagnetic interference; this can enable reliable, automatic testing and fault detection for EEMs. Experiments show that our device can decrease the labor cost for EEM manufacturers.

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