Lonn S et al. · 2004
Researchers used national cancer registries in Denmark, Finland, Norway, and Sweden to obtain cases of benign and malignant primary intracerebral tumors in adults aged 20-79 for the years 1969-98. Overall incidence ranged from 8.4 to 11.8 for men and 5.8 to 9.3 for women, with average annual increases of 0.6% for men and 0.9% for women. The increase was confined to the late 1970s and early 1980s, coinciding with improved diagnostic methods, and incidence remained stable after 1983 during the period of increasing mobile phone use.
Leszczynski D, Nylund R, Joenvaara S, Reivinen J. · 2004
The authors argue that high-throughput screening techniques are justified and necessary for studying biological effects of mobile phone radiation. They present the hsp27 protein as an example, suggesting that even modestly altered expression and activity might impact cell physiology. The full evidence is too large for one article and is being prepared for three separate research articles.
Lesch MF, Hancock PA. · 2004
L'Abbate N et al. · 2004
Kimata H. · 2004
Writing mail on a mobile phone increased plasma nerve growth factor, neurotrophin-3, and allergic skin wheal responses in atopic dermatitis patients. Viewing a comic video reduced these neurotrophin levels and allergic skin responses, while a nonhumorous video did not. Previewing the comic video also counteracted the mobile phone-mediated enhancement of neurotrophins and allergic skin wheal responses, whereas the weather video did not.
Hamblin DL, Wood AW, Croft RJ, Stough C. · 2004
Twelve participants completed two sessions one week apart, performing an auditory oddball task during active mobile phone exposure and sham exposure. Each exposure condition lasted one hour and the order was counterbalanced. Real exposure reduced N100 amplitude and latency to non-targets, with larger reductions over midline and right hemisphere sites. Reaction time increased during real exposure, but accuracy did not differ.
Hallberg O, Johansson O. · 2004
Researchers examined the development of mobile phone communication to see how it possibly relates to health impairment of the Swedish population. Official data on mobile phone use and long-term absence from work were collected and their co-variation was used to estimate future long-term absence rates under the hypothesis of a connection.
Grant H, Heirman D, Kuriger G, Ravindran MM. · 2004
The study investigated electromagnetic interaction between current cell phone technology and specific models of Cyberonics neural stimulators. Out of 1080 test runs conducted, no interactions were observed. The phone technologies examined did not adversely affect the Cyberonics NeuroStar Model 102 NeuroCybernetic Prosthesis System.
Demsia G, Vlastos D, Matthopoulos DP. · 2004
The study aimed to investigate whether 910-MHz electromagnetic fields could be a noxious agent capable of inducing genotoxicity, and rats were exposed daily for 2 h over 30 consecutive days. Researchers examined bone marrow smears from EMF-exposed and sham-exposed animals and observed an almost threefold increase in micronuclei in polychromatic erythrocytes. An induction of micronuclei was also observed in polymorphonuclear cells.
Czyz J et al. · 2004
Researchers exposed wild-type and p53-deficient embryonic stem cells to GSM-217 and GSM-Talk modulated electromagnetic fields at 1.71 GHz. GSM-217 exposure significantly increased hsp70 mRNA levels in p53-deficient cells, with a transient rise in c-jun, c-myc, and p21 levels only in those cells. GSM-Talk exposure produced no gene expression changes in either cell type, and cardiac differentiation and cell cycle were unaffected by GSM-217.
Curcio G et al. · 2004
Researchers randomly assigned subjects to two groups exposed to 902.40 MHz EMF either before or during testing sessions. Subjects completed four performance tasks under double-blind conditions while tympanic temperature was measured five times per session. Results showed improved simple and choice reaction times and increased local temperature on the exposed region after at least 25 minutes of exposure.
Charlton SG. · 2004
The experiment compared three types of curve warnings across three different curve types in a driving simulator. All warnings worked reasonably well for severe curves at 45 km/h regardless of cell phone task demands. For less demanding curves, only warnings with a strong perceptual component reduced drivers' curve speeds in the presence of the cell phone task.
Bortkiewicz A, Zmyslony M, Szyjkowska A, Gadzicka E. · 2004
The review investigated subjective symptoms reported by people living near cellular phone base stations. Questionnaire surveys revealed various complaints mostly of the circulatory system, plus sleep disturbances, irritability, depression, blurred vision, concentration difficulties, nausea, lack of appetite, headache and vertigo. Studies showed a relationship between symptom incidence, exposure level, and distance from base stations. This association appeared in both people who attributed symptoms to the base station and those who did not. No studies worldwide found exposures exceeding ICNIRP standards.
Bergamaschi A, Magrini A, Ales G, Coppetta L, Somma G. · 2004
The study aimed to analyze the effects of mobile phone use on thyroid function and evaluate the role of occupational stress. It included 2598 employees with different duties, assessing mobile phone exposure via questionnaire and conversation times. No significant difference in TSH values below 0.4 UI/l was found among workers with different duties, but employees with more than 33 hours per month of conversation time had a significantly greater prevalence of low SH values. The researchers could not determine whether this result was due to EMF exposure or stress.
Berg G, Schuz J, Samkange-Zeeb F, Blettner M. · 2004
Researchers validated self-reported mobile phone use by comparing it with cumulative emitted power measured by software-modified phones used by 45 volunteers for one month. Self-reported call number correlated with cumulative power at 0.50 and call duration at 0.48, each explaining about 23% of the variance in emitted power. Adding confounding factors such as network provider, contract form, and phone model increased explained variance to 26%, while using the phone while driving or in urban or rural areas showed no association with cumulative power.
Barkana Y, Zadok D, Morad Y, Avni I. · 2004
Twenty male and 21 female healthy participants performed a pretest and baseline Esterman visual field examinations with the Humphrey Systems Visual Field Analyzer II. During the consequent third examination, each participant engaged in a hands-free conversation using a cellular phone. During phone conversation, missed points increased significantly in both eyes, fixation loss increased, and test duration per stimulus increased by 15%. Approximately half of missed points were inside the central 30 degrees, and there was no significant difference between male and female participants.
Atchley P, Dressel J. · 2004
Researchers conducted two between-subjects experiments with college undergraduates measuring functional field of view alone and during a hands-free conversational task. The conversational task led to large reductions in the functional field of view in both experiments. The authors suggest this reduction may be an important mechanism for increased crash risk with in-car phone use.
Ardoino L, Barbieri E, Vecchia P. · 2004
Researchers used special phones modified to continuously log power emitted during calls to analyze mobile phone behavior under real-use conditions. The results indicated a high proportion of use of the highest power levels under any circumstance. This behavior was mainly due to frequent handovers requested by control software to optimize communication traffic.
Al-Khlaiwi T, Meo SA. · 2004
Researchers conducted a study in Saudi Arabia with 437 mobile phone users. The results showed an association between mobile phone use and health hazards, with headache at 21.6%, sleep disturbance at 4.%, tension at 3.9%, fatigue at 3%, and dizziness at 2.4%. The authors concluded that mobile phone use is a risk factor for health hazards and recommended avoiding long-term or excessive use through health promotion activities.
Ji S, Oh E, Sul D, Choi JW, Park H, Lee E. · 2004
Researchers used the Comet assay to measure Olive Tail Moment and Tail DNA% in T-cells, B-cells, and granulocytes before and after exposure. Olive Tail Moment and Tail DNA% in B-cells and granulocytes increased significantly after exposure.
Kim MJ, Rhee SJ. · 2004
Researchers exposed rats to 2.45 GHz microwave radiation for 15 minutes and then fed them diets containing 0%, 0.25%, or 0.5% catechin. Microwave exposure increased cytochrome P450 levels by 85% and NADPH-cytochrome P450 reductase activity by 29% compared with normal rats. It also raised superoxide radical concentrations by 35% and decreased superoxide dismutase activity by 34% and glutathione peroxidase activity by 28%. Catechin supplementation at 0.25% and 0.5% lowered superoxide radicals by 11% and 12%, increased superoxide dismutase activity by 19% and 25%, and kept glutathione peroxidase near normal.
Ilhan A et al. · 2004
Researchers investigated the effect of Ginkgo biloba on mobile phone-induced oxidative damage in rat brain tissue. Mobile phone exposure increased malondialdehyde, nitric oxide, xanthine oxidase, and adenosine deaminase while decreasing superoxide dismutase and glutathione peroxidase activities in brain tissue. Ginkgo biloba treatment prevented these oxidative alterations and the mobile phone-induced cellular injury in brain tissue.
Ayata A et al. · 2004
Thirty Wistar-Albino rats were assigned to control, irradiated, and irradiated-plus-melatonin groups, and the irradiated group received 900 MHz, 2 W radiation for 30 minutes daily over 10 days. The melatonin group received 10 mg/kg/day melatonin in tap water for 10 days before irradiation. Skin samples were analyzed for malondialdehyde, hydroxyproline, superoxide dismutase, glutathione peroxidase, and catalase. Radiation significantly increased MDA, hydroxyproline, CAT, and GSH-Px and decreased SOD; melatonin reversed the increases in MDA, hydroxyproline, CAT, and GSH-Px but did not prevent the SOD decrease. The results suggest that 900 MHz radiation increases fibrosis and lipid peroxidation in rat skin and that melatonin can reduce these effects.
Zwirska-Korczala K et al. · 2004
Yao K, Wang KJ, Sun ZH, Tan J, Xu W, Zhu LJ, Lu de Q. · 2004
Researchers exposed cultured rabbit lens epithelial cells to continuous 2,450 MHz microwave radiation at power densities of 0.10, 0.25, 0.50, 1.00, and 2.00 mW/cm2 for 8 hours. P27Kip1 protein expression increased markedly but its mRNA levels did not change, and P21WAF1 protein and mRNA levels showed no detectable differences between exposed and control groups.
