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MeSH: radiační leukemie

7 záznamů v PubMed Filtry

Článek

Study of extremely low frequency electromagnetic fields in infant incubators

Cermáková, Eleonora
Autor Cermáková, Eleonora Department of Physics, Faculty of Civil Engineering, Brno University of Technology, Brno, Czech Republic. cermakova.e@fce.vutbr.cz

International journal of occupational medicine and environmental health. 2003 ; 16 (3) : 215-20.

Int J Occup Med Environ Health
ISSN 1232-1087
Zdroj

OBJECTIVES: The aim of the work was to present the results of measurements of extremely low frequency electromagnetic fields (ELF EMF), namely the magnetic flux density, inside infant incubators, and to compare these results with the data published by other authors who point out to a possible association between leukemia or other diseases observed in newborns kept in incubators after the birth and the ELF EMF exposure in the incubator. The measured magnetic flux densities were compared with the reference values for this frequency range indicated in the European Union (EU) recommendations. MATERIALS AND METHODS: The repeated measurements in incubators were made with a calibrated magnetometer EFA 300 in the frequency range of 5-30 kHz. Effective values of magnetic flux densities of ELF EMF were determined taking account of the reference values. RESULTS: The results of many repeated measurements showing the values of magnetic flux density in modern incubators with plastic supporting frame, were compared with those obtained in old type incubators with iron skeleton. A power frequency of 50 Hz was detected in the incubator and the ELF EMF values were by over two orders lower than the EU reference values. CONCLUSIONS: The paper emphasizes the need to take a special care of newborns kept in incubators even if only the sub-reference values are detected. The EU reference values are intended for the adult human population. A baby in an incubator has much smaller dimensions, higher electric conductivity and maybe trigger another mechanism of response to ELF EMF than that indicated in this paper.

MeSH
elektromagnetická pole škodlivé účinky MeSH
Evropská unie MeSH
inkubátory kojenecké * MeSH
lidé MeSH
novorozenec MeSH
radiační leukemie etiologie MeSH
referenční hodnoty MeSH
rizikové faktory MeSH
vystavení vlivu životního prostředí škodlivé účinky MeSH
Check Tag
lidé MeSH
novorozenec MeSH
Publikační typ
časopisecké články MeSH

Článek

Hemoblastoses in mice contaminated with low activities of 239Pu

Neoplasma. 1990 ; 37 (6) : 639-46.

ISSN 0028-2685
Zdroj

Female ICR mice were injected intravenously with low activities of 239Pu (3.0 kBq, 6.0 kBq, 12.3 kBq/kg). In these mice with high spontaneous incidence of hemoblastoses the occurrence of myeloid leukemia, lymphocytic leukemia, lymphosarcoma, reticulum-cell sarcomas and osteosarcoma was studied. Hemoblastoses, on the whole, remained in their numbers radiation-independent, nevertheless, the distribution into specific types changed, with moderate prevalence of myeloid and lymphocytic leukemia and lymphosarcoma. After plutonium injection the mean survival time of mice bearing myeloid and lymphocytic neoplasias was significantly shorter than the survival of mice that died of retothelosarcoma and from other causes. These contamination-dependent differences could not be observed in matched controls. As expected, 239Pu activities used in this experiment induced osteosarcomas. Whereas in leukemogenesis alpha-radiation appeared as a factor promoting and modifying the leukemogenic process, in osteosarcoma the alpha-particles acted rather as an initiator, the effect of which was dependent on the dose to the endosteal progenitor cells.