نتایج جستجو برای: static magnetic field

تعداد نتایج: 1138655  

Journal: :Progress in biophysics and molecular biology 2006
Gunde Ziegelberger Michael Repacholi Alastair McKinlay

The rapid development of technologies using static magnetic fields particularly in medicine has resulted in an increase in human exposure to very high static magnetic fields. ICNIRP is the internationally recognised body that sets guidelines for protection against adverse health effects of non-ionizing radiation including static magnetic fields. It has recently published guidelines on limiting ...

Journal: :BioRisk 2022

Background : Recognizing effects of static magnetic field (SMF) varying flux density on flora and fauna is attempted. For this purpose the influence SMF upon porphine molecule studied. Methods Computations effect 0.0, 0.1, 1, 10 100 AFU (1 > 1000 T) were performed in silico for changes distribution electron that molecule. HyperChem 8.0 software was used together with AM1 method optimizat...

Journal: :BioRisk 2022

Background : An attempt to recognize the effects of a static magnetic field (SMF) varying flux density on flora and fauna.. For this purpose influence upon molecules Mg(II), Fe(II), Fe(III), Co(II), Co(III) Cu(II) metalloporphyrins is studied. Methods Computations effect real SMF 0.0, 0.1, 1, 10 100 AFU (Arbitrary Magnetic Field Unit; here 1AMFU > 1000 T) were performed in silico (comput...

Journal: :Brain Stimulation 2017
Marco Kufner Sabrina Brückner Thomas Kammer

BACKGROUND Recently, it was reported that the application of a static magnetic field by placing a strong permanent magnet over the scalp for 10 min led to an inhibition of motor cortex excitability for at least 6 min after removing the magnet. When placing the magnet over the somatosensory cortex, a similar inhibitory after effect could be observed as well. OBJECTIVE Our aim was to replicate ...

2013
Jie Meng Bo Xiao Yu Zhang Jian Liu Huadan Xue Jing Lei Hua Kong Yuguang Huang Zhengyu Jin Ning Gu Haiyan Xu

A novel nanofibrous composite scaffold composed of super-paramagnetic γ-Fe2O3 nanoparticles (MNP), hydroxyapatite nanoparticles (nHA) and poly lactide acid (PLA) was prepared using electrospinning technique. The scaffold well responds extern static magnetic field with typical saturation magnetization value of 0.049 emu/g as well as possesses nanofibrous architecture. The scaffolds were implante...

2017
Haje Korth Catherine L Johnson Lydia Philpott Nikolai A Tsyganenko Brian J Anderson

Mercury's solar wind and interplanetary magnetic field environment is highly dynamic, and variations in these external conditions directly control the current systems and magnetic fields inside the planetary magnetosphere. We update our previous static model of Mercury's magnetic field by incorporating variations in the magnetospheric current systems, parameterized as functions of Mercury's hel...

2013
Vasyl F. Chekhun Lesia A. Naleskina Liudmila Z. Polishchuk Igor M. Todor Dmytro V. Demash Natalia Yu. Lukianova

The aim of the investigations was to evaluate benefits of the directed transport system—a nanocomposite, based on cisplatin and magnetite combined with local action of constant magnetic field on the tumor, in experiments in vivo in animals with transplantable Guerin carcinoma. Animals were divided into 5 groups according to the type of agent. We showed that nanocomposite in combination with sta...

1999
DAVID PERSSON

It is well known that a tachyonic mode appears in the spectrum of Yang—Mills theory with a static uniform magnetic field, and that the free energy has an (unstable) minimum at finite magnetic field. It is argued that spontaneous generation of magnetic field does not take place at high temperature due to nonperturbative magnetic screening. Furthermore, the dispersion relation for gauge field flu...

Journal: :Bioelectromagnetics 1998
M N Zhadin V V Novikov F S Barnes N F Pergola

Combined parallel static and alternating magnetic fields cause a rapid change in the ionic current flowing through an aqueous glutamic acid solution when the alternating field frequency is equal to the cyclotron frequency. The current peak is 20-30% of the background direct current. The peak is observed with slow sweep in the alternating magnetic field frequency from 1 Hz-10 Hz. Only one resona...

This study was designed to investigate the effects of applying 1 mT static magnetic field (SMF) during the vitrification process, on the viability of ovarian follicles after vitrification-warming and autotransplantation. The study was conducted in two phases. In the first phase, ovaries of female NMRI mice (6 to 8 weeks old) were randomly divided into three groups: 1- Freshly isolated ovaries f...

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