نتایج جستجو برای: magnetic fields

تعداد نتایج: 535087  

The problem of unbounded uniaxial chiral omega media in the presence of both static electric and magnetic point charges is investigated. For this purpose scalar electric and magnetic potentials in these media are introduced. Using these potentials, the corresponding electric and magnetic fields are determined. The similar problem of static electric and magnetic current sources with the goal of ...

Journal: :iranian journal of medical physics 0
gholamreza hamzavi m.sc. in physiology, physiology dept., shiraz university of medical sciences, shiraz, iran karim rastegar associate professor, physiology dept., shiraz university of medical sciences, shiraz, iran asad-allah zarifkar associate professor, physiology dept., shiraz university of medical sciences, shiraz, iran mehdi movahedi instructor, medical physics dept., shiraz university of medical sciences, shiraz, iran

introduction: biological effects of magnetic fields have been investigated by scientists for many years and a vast amount of research using different frequencies and intensities have been performed on humans and laboratory animals. the results of these studies, which have mostly been done by applying high frequencies, have shown that electromagnetic fields are effective on structure and functio...

Journal: :medical journal of islamic republic of iran 0
a a. asgari from the department of physiology, baghiyatollah university of medical sciences, tehran ai weir the •wellcome biomagnetism unit. department of clinical neurophysiology, lnstitute of neurological sciences, southern general hospital, glasgow, uk.

the second somatosensory area (sli) has been studied both by electrical evoked potentials24 and magnetoencephalography (meg)5 magnetic evoked fields of contralateral primary somatosensory and ipsilateral second somatosensory cortices of 12 normal subjects were recorded in response to median nerve electrical stimulation by means of a single magnetometer. we detected. in addition to the usual con...

Journal: :iranian journal of medical physics 0
mehri kaviani moghadam ph.d. student in medical physics, tarbiat modares university, tehran, iran , seyed mohammad jafar pourmir firoozabadi associate professor, medical physics dept., tarbiat modares university, tehran, iran m. lak m.sc. student in biomedical engineering (bioelectric), science and research campus, islamic azad university, member of young researchers club, tehran, iran m. janahmadi professor, physiology and neuroscience research center, shahid beheshti medical sciences university, tehran, iran

introduction:  the  use  of  mobile  communication  systems  has  dramatically  increased  over  the  past  decade. although many studies have been performed to determine the effect of radio frequency (rf) but  less attention has been paid to the possible biological impact of exposure to extremely low frequency  (elf) components.   the objective of this study is two folds. one is to design the ...

Journal: :iranian journal of medical sciences 0
maryam heidari department of medical physics, school of medicine, shiraz university of medical sciences, shiraz, iran; and student research committee, shiraz university of medical sciences, shiraz, iran naghmeh sattarahmady department of medical physics, school of medicine, shiraz university of medical sciences, shiraz, iran; and nanomedicine and nanobiology research center, school of medicine, shiraz university of medical sciences, shiraz, iran sirus javadpour department of materials science and engineering, school of electrical and computer engineering, shiraz university, shiraz, iran negar azarpira transplant research center, department of pathology, namazee teaching hospital, shiraz university of medical sciences, shiraz, iran hossein heli department of nanomedicine, school of advanced medical sciences and technologies, shiraz university of medical sciences, shiraz, iran alireza mehdizadeh department of medical physics, school of medicine, shiraz university of medical sciences, shiraz, iran; and nanomedicine and nanobiology research center, school of medicine, shiraz university of medical sciences, shiraz, iran

background: nowadays, magnetic nanoparticles (mnps) have received much attention because of their enormous potentials in many fields such as magnetic fluid hyperthermia (mfh). the goal of hyperthermia is to increase the temperature of malignant cells to destroy them without any lethal effect on normal tissues. to investigate the effectiveness of cancer therapy by magnetic fluid hyperthermia, fe...

Journal: :physical chemistry research 0
gholam hossein bordbar shiraz university n. taheri shiraz university

in this paper, the hartree-fock method has been formulated to investigate some of the ground state properties of quasi-one-dimensional interacting electron gas in the presence of the magnetic field. the bare coulomb interaction between electrons has been assumed. for this system, we have also computed some of its thermodynamic and magnetic properties such as the energy, pressure, incompressibil...

Journal: :journal of biomedical physics and engineering 0
a ghadimi-moghadam pediatric infectious ward,yasuj university of medical sciences, yasuj,iran s m j mortazavi ionizing and non-ionizing radiation protection research center (inirprc), shiraz university of medical sciences, shiraz, iran a hosseini-moghadam student research committee,shiraz university of medical sciences, shiraz,iran m haghani ionizing and non-ionizing radiation protection research center (inirprc), shiraz university of medical sciences, shiraz, iran s taeb ionizing and non-ionizing radiation protection research center (inirprc), shiraz university of medical sciences, shiraz, iran m a hosseini

mri workers are occupationally exposed to static and time-varying gradient magnetic fields.  while the 24-hour time-averaged exposure to static magnetic fields is about a few mt, the maximum static field strength can be as high as 500 mt during patient set up. over the past several years, our lab has performed extensive experiments on the health effects of exposure of animal models and humans t...

Priming of seeds by magnetic fields (magneto priming) is proposed as an ecological, useful and low-priced method for improvement of seed germination and plant emergence. In order to evaluate the germination behavior of sesame seeds affected by magnetic fields, an experiment was conducted as a completely randomized design with 22 treatments (non-exposure to magnetic fields (control) and 21 magne...

Journal: :iranian journal of pharmaceutical research 0
a ahangarpour mj tahmasebi birgani h shahbazian m badavi

power stations produce a range of magnetic fields more than 20 mt which are harmful to those working or living around them. several investigators have reported an increased health risk due to exposure to electric and magnetic fields (emf) at 50 and 60 hz. several studies have been reported especially with increased tumor incidence, effects on reproduction and development, and neural and behavio...

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