Growth, Development, Reproduction, Physiological and Behavioural Studies on Living Organisms, Human Adults and Children Exposed to Radiation from Video Displays

• Published in: Indoor + built environment Vol. 10; no. 5; pp. 306 - 309
• Main Authors: Laverdure, A.M., Surbeck, J., North, M.O., Tritto, J.
• Format: Journal Article
• Language: English
• Published: Basel, Switzerland 01-05-2001
• Subjects: Original Paper; Reproduction; Growth; Video display terminal; Radiation
• ISBN: 3805574169; 9783805574167
• ISSN: 1420-326X; 1423-0070
• DOI: 10.1159/000057544

Various living organisms, human workers and children were tested for any biological action resulting from exposure to radiation from video display terminals (VDTs). VDTs were powered by a 50-Hz alternating voltage of 220 V. Measured electric and magnetic fields were 13 V/M and 50 nT, respectively. Living organisms were maintained under their normal breeding conditions and control values were obtained before switching on the VDT. Various effects related to the irradiation time were demonstrated, i.e. growth delay in algae and Drosophila, a body weight deficiency in rats, abnormal peaks of mortality in Daphnia and Drosophila, teratological effects in chick embryos and behavioural disturbances in rats. The embryonic and neonatal periods showed a high sensitivity to the VDT radiation. In humans, after 4 h of working in front of a VDT screen, an increase in tiredness and a decrease in the resistance of the immune system were observed in workers. In prepubertal children, 20 min of exposure were sufficient to induce neuropsychological disturbances; pre-pubertal young people appear to be particularly sensitive to the effect of the radiation. In human testicular biopsies cultured in vitro for 24 h in front of a VDT screen, mitotic and meiotic disturbances, the appearance of degeneration in some aspects of the cells and significant disorganisation of the seminiferous tubules were demonstrated and related to modification of the metabolism of the sample. An experimental apparatus has been developed and tested that aims to prevent the harm from VDT radiation. Known commercially as the emf-Bioshield ® , it ensures effective protection against harmful biological effects of VDT radiation.