Mobile phone ownership and use among school children in three Hungarian cities.

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 grade school children in three Hungarian cities. From 24 schools, 1301 student filled out a short, self-administered questionnaire on basic demographics, mobile phone ownership, pattern of mobile phone use, and after-school activities. Overall, 989 students (76%) owned a mobile phone. Three hundred thirteen students (24%) used a mobile phone daily to make phone calls, and an additional 427 students (33%) used mobile phones for phone calls at least several times per week. Sixty-six students (5%) sent text messages daily and an additional 308 students (24%) sent text messages at least several times per week. Girls, children with no siblings, children who were members of a sport club, and children who played computer games daily were more likely to own and use mobile phones regularly. A higher number of socially disadvantaged children in a class predicted lower likelihood of regular mobile phone use among children. Our results suggest that mobile phone ownership and regular use is highly prevalent among school children in Hungary. Due to rapid changes in ownership patterns follow up surveys will be required to obtain information on temporal trends and changes in mobile phone ownership and pattern of use among school children.

journal_name

Bioelectromagnetics

journal_title

Bioelectromagnetics

authors

Mezei G,Benyi M,Muller A

doi

10.1002/bem.20270

subject

Has Abstract

pub_date

2007-05-01 00:00:00

pages

309-15

issue

4

eissn

0197-8462

issn

1521-186X

journal_volume

28

pub_type

杂志文章
  • Does direction of induced electric field or current provide a test of mechanism involved in nerve regeneration?

    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

    authors: Greenebaum B,Sisken BF

    更新日期:2007-09-01 00:00:00

  • Magnetic-field-induced vertigo: a theoretical and experimental investigation.

    abstract::Vertigo-like sensations or apparent perception of movement are reported by some subjects and operators in and around high field whole body magnetic resonance body scanners. Induced currents (which modulate the firing rate of the vestibular hair cell), magneto-hydrodynamics (MDH), and tissue magnetic susceptibility dif...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/bem.20316

    authors: Glover PM,Cavin I,Qian W,Bowtell R,Gowland PA

    更新日期:2007-07-01 00:00:00

  • Methods of evaluating human exposure to electromagnetic fields radiated from operating base stations in Korea.

    abstract::This article presents measurement methods used to determine the human exposure to electromagnetic fields radiated from operating base stations. In Korea, when evaluating the human exposure to electromagnetic fields from operating base stations, the measurement procedure is different between the following cases: in sit...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/bem.20416

    authors: Kim BC,Choi HD,Park SO

    更新日期:2008-10-01 00:00:00

  • SAR versus S(inc): What is the appropriate RF exposure metric in the range 1-10 GHz? Part I: Using planar body models.

    abstract::This is the first of two articles addressing the most appropriate crossover frequency at which incident power flux density (S(inc)) replaces the spatial peak value of the specific energy absorption rate (SAR) averaged over 1 or 10 g (i.e., peak 1 or 10 g SAR) as the basic restriction for protecting against radiofreque...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/bem.20578

    authors: Anderson V,Croft R,McIntosh RL

    更新日期:2010-09-01 00:00:00

  • Coronary heart diseases: assessment of risk associated with work exposure to ultralow-frequency magnetic fields.

    abstract::The present analysis was stimulated by previous findings on the possible influence of natural ultralow-frequency (ULF; 0.001-10 Hz) geomagnetic field variations on the cardiovascular system and indications of an effect of man-made ULF magnetic fields on the rate of myocardial infarction. In the present study, we consi...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/(SICI)1521-186X(1996)17:6<436::AID-BEM2>3.

    authors: Ptitsyna NG,Villoresi G,Kopytenko YA,Kudrin VA,Tyasto MI,Kopytenko EA,Iucci N,Voronov PM,Zaitsev DB

    更新日期:1996-01-01 00:00:00

  • Effects of 50 Hz sinusoidal magnetic fields on Hsp27, Hsp70, Hsp90 expression in porcine aortic endothelial cells (PAEC).

    abstract::The aim of the present study was to investigate the influence of 50 Hz sinusoidal magnetic field on Hsp27, Hsp70, and Hsp90 expression in a model of primary culture of porcine aortic endothelial cells (PAEC). We took into consideration the Hsp profile in terms of mRNA expression, protein expression and protein localiz...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/bem.20299

    authors: Bernardini C,Zannoni A,Turba ME,Bacci ML,Forni M,Mesirca P,Remondini D,Castellani G,Bersani F

    更新日期:2007-04-01 00:00:00

  • Chronic exposure to ELF magnetic fields during night sleep with electric sheet: effects on diurnal melatonin rhythms in men.

    abstract::The possible effects of repeated night-time exposure to an extremely low frequency magnetic field (ELF-MF) on melatonin were investigated in nine healthy male subjects aged 23-37 yr. The 16-week experiment consisted of 3 weeks of pre-exposure, 11 weeks of night-time exposure to MF generated from a nonheated electric s...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/1521-186x(200102)22:2<138::aid-bem1017>3.0

    authors: Hong SC,Kurokawa Y,Kabuto M,Ohtsuka R

    更新日期:2001-02-01 00:00:00

  • Exposure to electromagnetic fields from smart utility meters in GB; part I) laboratory measurements.

    abstract::Laboratory measurements of electric fields have been carried out around examples of smart meter devices used in Great Britain. The aim was to quantify exposure of people to radiofrequency signals emitted from smart meter devices operating at 2.4 GHz, and then to compare this with international (ICNIRP) health-related ...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/bem.22044

    authors: Peyman A,Addison D,Mee T,Goiceanu C,Maslanyj M,Mann S

    更新日期:2017-05-01 00:00:00

  • Thermoregulatory responses of the immature rat following repeated postnatal exposures to 2,450-MHz microwaves.

    abstract::This study was designed to determine the changes that occur in the thermoregulatory ability of the immature rat repeatedly exposed to low-level microwave radiation. Beginning at 6-7 days of age, previously untreated rats were exposed to 2,450-MHz continuous-wave microwaves at a power density of 5 mW/cm2 for 10 days (4...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/bem.2250080307

    authors: Spiers DE,Adair ER

    更新日期:1987-01-01 00:00:00

  • Magnetic field pattern synthesis and its application in targeted drug delivery: Design and implementation.

    abstract::In cancer therapy, magnetic drug targeting is considered as an effective treatment to reduce chemotherapy's side effects. The accurate design and shaping of magnetic fields are crucial for healthy cells to be immune from chemotherapeutics. In this paper, arbitrary 2-dimensional spatial patterns of magnetic fields from...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/bem.22107

    authors: Hajiaghajani A,Abdolali A

    更新日期:2018-05-01 00:00:00

  • Amplitude and frequency dissociation spectra of ion-protein complexes rotating in magnetic fields.

    abstract::A mechanism is presented that predicts new biological effects of static and sinusoidal weak magnetic fields. The model is based on an earlier proposed interference mechanism of quantum states of ions within protein cavities. The quantum dynamics of an ion is studied for the case of ion-protein complexes that rotate in...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:

    authors: Binhi VN

    更新日期:2000-01-01 00:00:00

  • A 0.5 G, 60 Hz magnetic field suppresses melatonin production in pinealocytes.

    abstract::The objective of this study was to develop a model for testing various hypotheses concerning possible mechanisms whereby electromagnetic fields might induce suppression of nighttime melatonin production in rodents. A published method for digesting freshly obtained pineal glands to the single cell level was modified, y...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:

    authors: Rosen LA,Barber I,Lyle DB

    更新日期:1998-01-01 00:00:00

  • ELF magnetic field exposure system with feedback-controlled disturbance rejection.

    abstract::Extremely low-frequency (ELF) magnetic field exposure systems are usually subject to field disturbances induced by external sources. Here, a method for designing a feedback control system for cancelling the effect of external ELF magnetic field disturbances on the magnetic field over the exposure area is presented. Th...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/(sici)1521-186x(1997)18:4<299::aid-bem2>3.

    authors: Wang PK

    更新日期:1997-01-01 00:00:00

  • Chronically indwelling venous cannula and automatic blood sampling system for use with nonhuman primates exposed to 60 Hz electric and magnetic fields.

    abstract::An automated blood sampling system was developed for use with tethered baboons (Papio cynocephalus) during concurrent exposure to 60 Hz 30 kV/m electric fields and 0.1 mT (1.0 G) magnetic fields. The system was controlled by a FORTH-based microcomputer, which operated a pump, a fraction collector, and two pinch valves...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/bem.2250160710

    authors: Rogers WR,Lucas JH,Mikiten BC,Smith HD,Orr JL

    更新日期:1995-01-01 00:00:00

  • Effects of a 50 Hz sinusoidal magnetic field on cell adhesion molecule expression in two human osteosarcoma cell lines (MG-63 and Saos-2).

    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

    authors: Santini MT,Rainaldi G,Ferrante A,Indovina PL,Vecchia P,Donelli G

    更新日期:2003-07-01 00:00:00

  • Extremely low frequency electromagnetic field (ELF-EMF) reduces oxidative stress and improves functional and psychological status in ischemic stroke patients.

    abstract::As a result of ischaemia/reperfusion, massive generation of reactive oxygen species occurs, followed by decreased activity of antioxidant enzymes. Extremely low frequency electromagnetic fields (ELF-EMF) can modulate oxidative stress, but there are no clinical antioxidant studies in brain stroke patients. The aim of o...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/bem.22055

    authors: Cichoń N,Bijak M,Miller E,Saluk J

    更新日期:2017-07-01 00:00:00

  • The remote sensing of mental stress from the electromagnetic reflection coefficient of human skin in the sub-THz range.

    abstract::Recent work has demonstrated that the reflection coefficient of human skin in the frequency range from 95 to 110 GHz (W band) mirrors the temporal relaxation of stress induced by physical exercise. In this work, we extend these findings to show that in the event of a subtle trigger to stress, such as mental activity, ...

    journal_title:Bioelectromagnetics

    pub_type: 临床试验,杂志文章

    doi:10.1002/bem.21698

    authors: Safrai E,Ishai PB,Caduff A,Puzenko A,Polsman A,Agranat AJ,Feldman Y

    更新日期:2012-07-01 00:00:00

  • Predicted SAR in Sprague-Dawley rat as a function of permittivity values.

    abstract::Specific absorption rate (SAR) value is dependent on permittivity value. However, variability in the published permittivity values for human and animal tissue and the development of sophisticated 3-dimensional digital anatomical models to predict SAR values has resulted in the need to understand how model parameters (...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/bem.66

    authors: Gajsek P,Ziriax JM,Hurt WD,Walters TJ,Mason PA

    更新日期:2001-09-01 00:00:00

  • Effects of static magnetic field on specific adenosine-5'- triphosphatase activities and bioelectrical and biomechanical properties in the rat diaphragm muscle.

    abstract::In this study, we aimed to clarify the effects of chronically applied static magnetic field (200 Gauss) on specific ATPase activities and bioelectrical and biomechanical responses in isolated rat diaphragm muscle. The mean activities of Na(+)-K+ ATPase and Ca2+ ATPase determined from the diaphragm homogenates were sig...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/bem.2250160302

    authors: Iteğin M,Günay I,Loğoğlu G,Isbir T

    更新日期:1995-01-01 00:00:00

  • The interphase interval within a bipolar nanosecond electric pulse modulates bipolar cancellation.

    abstract::Nanosecond electric pulse (nsEP) exposure generates an array of physiological effects. The extent of these effects is impacted by whether the nsEP is a unipolar (UP) or bipolar (BP) exposure. A 600 ns pulse can generate 71% more YO-PRO-1 uptake compared to a 600 ns + 600 ns pulse exposure. This observation is termed "...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/bem.22134

    authors: Valdez CM,Barnes R Jr,Roth CC,Moen E,Ibey B

    更新日期:2018-09-01 00:00:00

  • Wire codes, magnetic fields, and childhood cancer.

    abstract::Childhood cancer has been modestly associated with wire codes, an exposure surrogate for power frequency magnetic fields, but less consistently with measured fields. We analyzed data on the population distribution of wire codes and their relationship with several measured magnetic field metrics. In a given geographic ...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章,评审

    doi:10.1002/(sici)1521-186x(1997)18:2<99::aid-bem2>3.0

    authors: Kheifets LI,Kavet R,Sussman SS

    更新日期:1997-01-01 00:00:00

  • Epidermal ornithine decarboxylase and polyamines in mice exposed to 50 Hz magnetic fields and UV radiation.

    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:

    authors: Kumlin T,Alhonen L,Jänne J,Lang S,Kosma VM,Juutilainen J

    更新日期:1998-01-01 00:00:00

  • Intracellular calcium activity in isolated bovine adrenal chromaffin cells in the presence and absence of 60 Hz magnetic fields.

    abstract::This study examined whether 60 Hz magnetic field (MF) exposure alters intracellular calcium levels ([Ca(2+)](i)) in isolated bovine adrenal chromaffin cells, a classic model of neural responses. [Ca(2+)](i) was monitored by fluorescence video imaging of cells loaded with the calcium indicator fluo-4 during exposures t...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/bem.10045

    authors: Craviso GL,Poss J,Lanctot C,Lundback SS,Chatterjee I,Publicover NG

    更新日期:2002-12-01 00:00:00

  • Inhibition of growth rate of Escherichia coli induced by extremely low-frequency weak magnetic fields.

    abstract::Cultures of Escherichia coli kept at 0 degree C in a phosphate buffer solution were exposed to a sinusoidal weak 60- or 600-Hz magnetic field of strength 2 X 10(-3) Tesla. A decrease of more than 40% in bacterial count was observed after a 60-h exposure to the magnetic field. Electron micrographs of exposed bacteria s...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/bem.2250020310

    authors: Ramon C,Ayaz M,Streeter DD Jr

    更新日期:1981-01-01 00:00:00

  • Effects of 1.8 GHz radiofrequency field on microstructure and bone metabolism of femur in mice.

    abstract::To investigate the effects of 1.8 GHz radiofrequency (RF) field on bone microstructure and metabolism of femur in mice, C57BL/6 mice (male, age 4 weeks) were whole-body exposed or sham exposed to 1.8 GHz RF field. Specific absorption rates of whole body and bone were approximately 2.70 and 1.14 W/kg (6 h/day for 28 da...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/bem.22125

    authors: Guo L,Zhang JP,Zhang KY,Wang HB,Wang H,An GZ,Zhou Y,Meng GL,Ding GR

    更新日期:2018-07-01 00:00:00

  • Extremely low frequency magnetic fields regulate differentiation of regulatory T cells: Potential role for ROS-mediated inhibition on AKT.

    abstract::Our previous studies showed that extremely low frequency magnetic fields (ELF-MFs) inhibited tumor growth and change proportion of splenic regulatory T cells (Treg cells). Here, we focus on the effect of ELF-MFs on lung metastatic melanoma mouse model and the regulatory mechanism of ELF-MFs on the differentiation of T...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/bem.21954

    authors: Tang R,Xu Y,Ma F,Ren J,Shen S,Du Y,Hou Y,Wang T

    更新日期:2016-02-01 00:00:00

  • Electromagnetic fields enhance the stress response at elevated temperatures in the nematode Caenorhabditis elegans.

    abstract::We have studied the effect of extremely low frequency electromagnetic fields (ELF-EMF) in the presence of a second stressor (mild heat shock) on the expression of a lacZ reporter gene under the control of hsp16 or hsp70 promoters in two transgenic strains of C. elegans. The expression of the reporter gene was studied ...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/(sici)1521-186x(200002)21:2<100::aid-bem4>

    authors: Junkersdorf B,Bauer H,Gutzeit HO

    更新日期:2000-02-01 00:00:00

  • ELF magnetic fields in electric and gasoline-powered vehicles.

    abstract::We conducted a pilot study to assess magnetic field levels in electric compared to gasoline-powered vehicles, and established a methodology that would provide valid data for further assessments. The sample consisted of 14 vehicles, all manufactured between January 2000 and April 2009; 6 were gasoline-powered vehicles ...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/bem.21730

    authors: Tell RA,Sias G,Smith J,Sahl J,Kavet R

    更新日期:2013-02-01 00:00:00

  • Real-time measurement of cytosolic free calcium concentration in Jurkat cells during ELF magnetic field exposure and evaluation of the role of cell cycle.

    abstract::Extremely low frequency magnetic fields (ELF MF) have been reported to alter a number of cell signaling pathways, including those involved in proliferation, differentiation and apoptosis where cytosolic free calcium ([Ca(2+)](c)) plays an important role. To better understand the biological conditions under which ELF M...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/bem.20248

    authors: McCreary CR,Dixon SJ,Fraher LJ,Carson JJ,Prato FS

    更新日期:2006-07-01 00:00:00

  • Lack of effects of 1439 MHz electromagnetic near field exposure on the blood-brain barrier in immature and young rats.

    abstract::Possible effects of 1439 MHz electromagnetic near field (EMF) exposure on the blood-brain barrier (BBB) were investigated using immature (4 weeks old) and young (10 weeks old) rats, equivalent in age to the time when the BBB development is completed and the young adult, respectively. Alteration of BBB related genes, s...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/bem.20138

    authors: Kuribayashi M,Wang J,Fujiwara O,Doi Y,Nabae K,Tamano S,Ogiso T,Asamoto M,Shirai T

    更新日期:2005-10-01 00:00:00