Enhanced Proliferation Caused by a Low Frequency Weak Magnetic Field in Chick Embryo Fibroblasts Is Suppressed by Radical Scavengers

1998 ◽  
Vol 252 (3) ◽  
pp. 753-756 ◽  
Author(s):  
Gila Katsir ◽  
Abraham H. Parola
Keyword(s):  
Magnetic Field ◽  
Chick Embryo ◽  
Weak Magnetic Field ◽  
Low Frequency ◽  
Radical Scavengers ◽  
Embryo Fibroblasts

Filamentation and collapse of Langmuir waves in a weak magnetic field

1982 ◽  
Vol 28 (1) ◽  
pp. 19-36 ◽  
Author(s):  
P. Rolland ◽  
S. G. Tagare
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Small Angle ◽  
Nonlinear Interaction ◽  
High Frequency ◽  
Weak Magnetic Field ◽  
Low Frequency ◽  
Langmuir Waves ◽  
The Magnetic Field

The filamentation and collapse of Langmuir waves in a weak magnetic field are analysed in two particular cases of low-frequency acoustic perturbations: (i) adiabatic perturbations which correspond to subsonic collapse, and (ii) nonadiabatic perturbations which correspond to supersonic collapse. Here the existence of Langmuir filaments and Langmuir collapse in a weak magnetic field are due to nonlinear interaction of high-frequency Langmuir waves (which make small angle with the external magnetic field) with low-frequency acoustic perturbations along the magnetic field.

Loss separation of amorphous and nanocrystalline Fe85−xCoxNb7B8 alloys in weak magnetic field at low frequency

2005 ◽  
Vol 396 (1-2) ◽  
pp. 155-158 ◽  
Author(s):  
Mao Xingyu ◽  
Xu Feng ◽  
Gao Wenli ◽  
Zhai Hongru ◽  
Du Youwei
Keyword(s):  
Magnetic Field ◽  
Weak Magnetic Field ◽  
Low Frequency

Frequency resonance effect of neurons under low-frequency weak magnetic field

2007 ◽  
Vol 310 (2) ◽  
pp. 2865-2867 ◽  
Author(s):  
María J. Azanza ◽  
A. del Moral ◽  
R.N. Pérez Bruzón
Keyword(s):  
Magnetic Field ◽  
Weak Magnetic Field ◽  
Resonance Effect ◽  
Low Frequency ◽  
Frequency Resonance

Effects of a Switched Weak Magnetic Field on Lecithin Liposomes, Investigated by Nonlinear Dielectric Spectroscopy

2003 ◽  
Vol 58 (5-6) ◽  
pp. 386-394 ◽  
Author(s):  
Alexander Pazur
Keyword(s):  
Magnetic Field ◽  
Dielectric Spectroscopy ◽  
Weak Magnetic Field ◽  
Electric Pulse ◽  
Low Frequency ◽  
Signal Amplitude ◽  
Egg Yolk ◽  
Pulse Frequency ◽  
Electric Pulses ◽  
The Difference

Three types of liposomes in aqueous solution were subjected to a low frequency switched weak magnetic field. A differential non-linear dielectric spectroscopy (DNLDS) was performed at 40 °C with two planar orthogonal electrodes, positioned parallel and vertical to the earth surface. The difference of the free voltage release (FVR) signals for the two orthogonal directions following electric pulses with an amplitude of 1.0 V and a duration of 25 ms, were Fourier-transformed. An additional magnetic field was switched with a period of 400 ms and a variable amplitude from 0 to 100 G, whose direction was parallel to the vertical electrode plane. With two of the liposomes (egg yolk lecithin (EY), asolectin doped with cholesterol (ASCO)) a decrease of the signal amplitude with increasing magnetic fields could be seen in most of the 25 observed harmonic frequencies (relative to the electric pulse frequency f(0) = 40 Hz). For EY liposomes this decrease was highly significant and not linear for the 1.-5., and above the 20. harmonic frequency, ASCO liposomes showed a similar effect. Asolectin liposomes showed the reverse response. Quantum mechanical conditions of charges on the liposome surface are discussed as a possible origin of these effects.

Effect of 50 Hz magnetic field on chicken embryo development and course of hatching

2019 ◽  
Vol 5 (2) ◽  
pp. 44-49
Author(s):  
Marcin Lis
Keyword(s):  
Magnetic Field ◽  
Chick Embryo ◽  
Chicken Embryo ◽  
Low Frequency ◽  
Quality Analysis ◽  
Control Group ◽  
Control Groups ◽  
Extremely Low Frequency ◽  
Helmholtz Coils ◽  
Elf Magnetic Field

The effect of additional extremely low frequency (ELF) magnetic field (50 Hz) on the development of chick embryo was investigated. The experiment was carried out in three variants for induction values 15 μT, 10 μT and 5 μT. Magnetic field (MF) in the experimental incubator was generated by a set of three Helmholtz coils. The following analyses were performed: embryopathological analysis; evaluation of the hatched chicks for quality; analysis of the course and synchronization of hatching. Increased embryo mortality was found between 1 and 6 days of incubation in 15 μT MF and between 18 and 20 days of incubation in 5 μT MF. In each group exposed to MF, the principal stage of hatching was completed earlier. Increased degree of chick hatching synchronization was observed in MF of 5 μT and 10 μT. Hatching results in the control group were higher than in MF exposed groups. Statistically significant (p≤0.05) differences were found for chick malpositions in the groups incubated with exposure to additional MF of 10 μT and 5 μT compared to the control groups.

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