Abstract:
:A new method for finding the dielectric parameters of biological substances is presented. The method makes use of the loss-tangent as a function of frequency to identify the dominating relaxation process. The method was tested for a few cell suspensions (blood and lymphocytes) and two tissues (liver and spleen). The obtained parameters agree well with those calculated from Maxwell-Wagner theory (beta dispersion).
journal_name
Bioelectromagneticsjournal_title
Bioelectromagneticsauthors
Surowiec A,Stuchly SSdoi
10.1002/bem.2250070303subject
Has Abstractpub_date
1986-01-01 00:00:00pages
259-69issue
3eissn
0197-8462issn
1521-186Xjournal_volume
7pub_type
杂志文章abstract::This paper investigates the effect of relevant physical parameters on transient temperature elevation induced in human tissues by electromagnetic waves in the terahertz (THz) band. The problem is defined by assuming a plane wave, which, during a limited time interval, normally impinges on the surface of a 3-layer mode...
journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.21842
更新日期:2014-07-01 00:00:00
abstract::The wide and growing use of cellular phones has raised questions about the possible health risks associated with radio frequency (RF) electromagnetic fields. It would be helpful for epidemiologists as well as cellular phone users to obtain the relative exposure levels, because the RF exposure level is very difficult t...
journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.20203
更新日期:2006-09-01 00:00:00
abstract::In an hypothesis-generating case-control study of amyotrophic lateral sclerosis, lifetime occupational histories were obtained. The patients (n = 28) were clinic based. The occupational exposure of interest in this report is electromagnetic fields (EMFs). This is the first and so far the only exposure analyzed in this...
journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/(sici)1521-186x(1997)18:1<28::aid-bem6>3.0
更新日期:1997-01-01 00:00:00
abstract::For 35 years, I have been involved in various bioelectromagnetics research projects including acute and long-term radiofrequency (RF) bioeffects studies, dosimetry, exposure systems, MRI safety, cancer studies involving hyperthermia and electrochemical treatment, development of RF exposure and measurement standards, a...
journal_title:Bioelectromagnetics
pub_type: 传,历史文章,杂志文章
doi:10.1002/bem.20292
更新日期:2007-01-01 00:00:00
abstract::The impedance spectroscopy technique (IST) was used for studying the effect of a 0.5 T magnetic field on the electrical properties of whole human blood. A Solartron SI 1260 spectrometer was used to measure the impedance spectra of magnetic field exposed blood samples compared to non-exposed samples. An equivalent elec...
journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.20132
更新日期:2005-10-01 00:00:00
abstract::Through the use of the non-invasive vibrating probe technique for detecting extracellular ionic currents developed in 1974 [Jaffe and Nuccitelli: J Cell Biol 63:614-628, 1974], embryonic currents have been detected in a wide range of animal systems (recently reviewed in [Nuccitelli, Noninvasive Techniques in Cell Biol...
journal_title:Bioelectromagnetics
pub_type: 杂志文章,评审
doi:10.1002/bem.2250130714
更新日期:1992-01-01 00:00:00
abstract::Research conducted over the past 5 years has addressed the hypothesis that the reported association between residential magnetic fields and childhood leukemia may be explained by exposure to contact current. The use of multi-grounded neutrals in electrical distribution and residential electrical wiring systems in the ...
journal_title:Bioelectromagnetics
pub_type: 杂志文章,评审
doi:10.1002/bem.20126
更新日期:2005-01-01 00:00:00
abstract::The effects of mm-waves 60.22-62.22 GHz and 75 GHz on A-type K+ currents and the effects of 61.22 GHz on Ca2+ currents of Lymnaea neurons were investigated using a whole-cell voltage-clamp technique. The open end of a rectangular waveguide covered with a thin Teflon film served as a radiator. Specific absorption rates...
journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:
更新日期:1999-01-01 00:00:00
abstract::We suggest an experimental comparison of two directions for applying the time-varying magnetic fields which have been found to speed spontaneous regeneration of injured peripheral nerves and in attempts to repair spinal cord injuries. Time-varying magnetic fields induce currents in a plane perpendicular to the magneti...
journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.20331
更新日期:2007-09-01 00:00:00
abstract::Calcium (45Ca2+) efflux from preloaded synaptosomes was studied with a continuous perfusion technique and the rate constants of a two-phase efflux process calculated. When 16-Hz sinusoidally amplitude modulated 450-MHz microwave field (maximal incident intensity 0.5 mW/cm2, modulation depth 75%) was applied during the...
journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.2250030303
更新日期:1982-01-01 00:00:00
abstract::The effects of hyperthermia, alone and in conjunction with microwave exposure, on brain energetics were studied in anesthetized male Sprague-Dawley rats. The effect of temperature on adenosine triphosphate concentration [ATP] and creatine phosphate concentration [CP] was determined in the brains of rats that were main...
journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.2250050107
更新日期:1984-01-01 00:00:00
abstract::Chemical and bacterial synthesis of a thermochemiluminescent polymer known as diazoluminomelanin (DALM) has been previously reported. This paper focuses on the intracellular synthesis of aminomelanin (AM) in mammalian cell lines and subsequent DALM synthesis from this core molecule. B16 melanoma cells, HL-60 myeloid l...
journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.2250150406
更新日期:1994-01-01 00:00:00
abstract::We studied the influence of magnetic fields (MFs) and simulated solar radiation (SSR) on ornithine decarboxylase (ODC) and polyamines in mouse epidermis. Chronic exposure to combined MF and SSR did not cause persistent effects on ODC activity or polyamines compared to the animals exposed only to UV, although the same ...
journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:
更新日期:1998-01-01 00:00:00
abstract::The constant exposure of modern society to extremely low frequency magnetic fields (ELF-MF) has raised considerable concerns about the potential risks to male reproduction. However, the epidemiological and experimental data remain contradictory and inconclusive. In the present study, we investigated the effects of 50 ...
journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.21816
更新日期:2014-01-01 00:00:00
abstract::The possibility that a sinusoidal 50 Hz magnetic field with a magnetic flux density of 0.5 mT can induce variations in the expression of cell adhesion molecules (CAMs) in two human osteosarcoma cell lines (MG-63 and Saos-2) was investigated. In particular, the expression of two important integrins, VLA-2, the receptor...
journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.10113
更新日期:2003-07-01 00:00:00
abstract::Introduction of genetic material into muscle tissue has been extensively researched, including isolation and in vitro expansion of primary myoblasts as a potential source of cells for skeletal and heart muscle tissue engineering applications. In this study, we optimized the electroporation protocol for introduction of...
journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.21936
更新日期:2015-12-01 00:00:00
abstract::The influence of a pulsed magnetic field (PMF; sawtooth with 45-microseconds linear rise time and 5-microseconds decay time, peak strength of 15 microT, and frequency 20000 pps) [corrected] on the embryogenesis of CBA/S mice was investigated in five experiments based on a total of 707 exposed and 543 unexposed primigr...
journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.2250140303
更新日期:1993-01-01 00:00:00
abstract::Both eyes of anesthetized cynomolgus monkeys (Macaca fascicularis) were irradiated with 2.45-GHz microwaves, either pulsed or continuous wave. In vivo corneal endothelial abnormalities were observed by specular microscopy and confirmed through histologic techniques after a 16- to 48-hour postexposure period. Pulsed mi...
journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.2250060209
更新日期:1985-01-01 00:00:00
abstract::The effects of exposure to a 50 Hz magnetic field (maximum of 41.7 to 43.6 mT) on the membrane protein structures of living HeLa cells were studied using attenuated total reflection infrared spectroscopy. One min of such exposure shifted peak absorbance of the amide I band to a smaller wave number, reduced peak absorb...
journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.10120
更新日期:2003-10-01 00:00:00
abstract::The objective of this study was to investigate if persons with implantable medical devices are intrinsically protected by the current electromagnetic safety guidelines. For inter-laboratory comparisons, the U.S. Food and Drug Administration has defined a generic implant as consisting of an insulated wire with noninsul...
journal_title:Bioelectromagnetics
pub_type: 临床试验,杂志文章
doi:10.1002/bem.21695
更新日期:2012-07-01 00:00:00
abstract::Pulsed electromagnetic fields (PEMF) have been used widely to treat nonunion fractures and related problems in bone healing, as a biological and physical method. With the use of Helmholtz coils and PEMF stimulators to generate uniform time-varying electromagnetic fields, the effects of extremely low frequency electrom...
journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.20535
更新日期:2010-02-01 00:00:00
abstract::In this study, we measured and analyzed the spectral characteristics of a low-frequency magnetic field (MF) inside several gasoline-powered cars while driving on busy city roads. The spectra obtained upon measurements in the interior of the cars are compared with those measured in office locations at different times o...
journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.22269
更新日期:2020-07-01 00:00:00
abstract::Pulsed electromagnetic fields (PEMF) have been proven to be effective for promoting bone mass and regulating bone turnover both experimentally and clinically. However, the exact mechanisms for the regulation of PEMF on osteoclastogenesis as well as optical exposure parameters of PEMF on inhibiting osteoclastic activit...
journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.22070
更新日期:2017-12-01 00:00:00
abstract::The aim of this study was to elucidate the possible effects of short-term exposure to a 1439-MHz electromagnetic field (EMF) employing time division multiple access (TDMA), which is the basis of the Japanese Personal Digital Cellular system, on estrogenic activity in rats. Sixty-four ovariectomized female Sprague-Dawl...
journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.20593
更新日期:2010-10-01 00:00:00
abstract::We study the effect of microwaves at 2,450 MHz on protein unfolding using surface plasmon resonance sensing. Our experimental method makes use of the fact that unfolding proteins tend to bind to chaperones on their unfolding pathway and this attachment is readily monitored by surface plasmon resonance. We use the prot...
journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.20382
更新日期:2008-05-01 00:00:00
abstract::Cytostatic-induced polyneuropathy (CIPN) is a common and serious toxicity in tumor patients. Treatment and prophylactic measures are mainly ineffective. Therefore, there is an urgent need to establish a sufficient therapy for pPNP. Between July 2007 and August 2008, 20 patients were treated with low frequency (4-12 Hz...
journal_title:Bioelectromagnetics
pub_type: 信件
doi:10.1002/bem.21897
更新日期:2015-04-01 00:00:00
abstract::This study deals with the morphofunctional influence of 72 h exposure to a 6 mT static magnetic field (SMF) during differentiation induced by 50 ng/ml 12-O-tetradecanoyl-13-phorbol acetate (TPA) in human leukaemia U937 cells. The cell morphology of U937 cells was investigated by optic and electron microscopy. Specific...
journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.20474
更新日期:2009-07-01 00:00:00
abstract::In spite of rapid worldwide increase in mobile phone use and public concerns about associated potential health effects, little is known about patterns of mobile phone ownership and use in the general population and among children. In April 2005, we conducted a survey of mobile phone ownership and use among fourth grad...
journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.20270
更新日期:2007-05-01 00:00:00
abstract::This study describes the effects of a static magnetic field (SMF) on cell growth and DNA integrity of human umbilical vein endothelial cells (HUVECs). Fast halo assay was used to investigate nuclear damage; quantitative polymerase chain reaction (QPCR), standard PCR, and real-time PCR were used to evaluate mitochondri...
journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.20591
更新日期:2010-12-01 00:00:00
abstract::Little is known about the influence of magnetic fields on growth of primitive eukaryotes such as the ciliate Paramecium. The latter are known to exhibit interesting characteristics such as electrotaxis, gravitaxis, and membrane excitability not commonly encountered in higher organisms. This preliminary study reports t...
journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.20172
更新日期:2006-01-01 00:00:00