From Dr Dimitris J.Panagopoulos in reply to message #703
They should not seek for complex explanations for the insect disappearance. The explanation is obvious and it is given in the attached papers.
Dr Dimitris J.Panagopoulos
Dep Cell Biol & Biophysics
[Note: abstracts only below-Don]
1) Mutation Research 626 (2007)69–78
Cell death induced by GSM 900-MHz and DCS 1800-MHz mobile telephony radiation
Dimitris J. Panagopoulos ∗, Evangelia D. Chavdoula, Ioannis P. Nezis, Lukas H. Margaritis Department of Cell Biology and Biophysics, Faculty of Biology, University of Athens, Panepistimiopolis, 15784 Athens, Greece
Received 21 April 2006; received in revised form 8 August 2006; accepted 28 August 2006 Available online 11 October 2006
Abstract In the present study: The TUNEL (Terminal deoxynucleotide transferase dUTP Nick End Labeling) assay – a well known technique widely used for detecting fragmented DNA in various types of cells – was used to detect cell death (DNA fragmentation) in a biological model, the early and mid stages of oogenesis of the insect Drosophila melanogaster. The flies were exposed in vivo to either GSM 900-MHz (Global System for Mobile telecommunications) or DCS 1800-MHz (Digital Cellular System) radiation from a common digital mobile phone, for few minutes per day during the first 6 days of their adult life. The exposure conditions were similar to those to which a mobile phone user is exposed, and were determined according to previous studies of ours [D.J. Panagopoulos, A. Karabarbounis, L.H. Margaritis, Effect of GSM900-MHz mobile phone radiation on the reproductive capacity of D. melanogaster, Electromagn. Biol. Med. 23 (1) (2004) 29–43; D.J. Panagopoulos, N. Messini, A. Karabarbounis, A.L. Philippetis, L.H. Margaritis, Radio frequency electromagnetic radiation within “safety levels” alters the physiological function of insects, in: P. Kostarakis, P. Stavroulakis (Eds.), Proceedings of the Millennium International Workshop on Biological Effects of Electromagnetic Fields, Heraklion, Crete, Greece, October 17–20, 2000, pp. 169–175, ISBN: 960-86733-0-5; D.J. Panagopoulos, L.H. Margaritis, Effects of electromagnetic fields on the reproductive capacity of D. melanogaster, in: P. Stavroulakis (Ed.), Biological Effects of Electromagnetic Fields, Springer, 2003, pp. 545–578], which had shown a large decrease in the oviposition of the same insect caused by GSM radiation. Our present results suggest that the decrease in oviposition previously reported, is due to degeneration of large numbers of egg chambers after DNA fragmentation of their constituent cells, induced by both types of mobile telephony radiation. Induced cell death is recorded for the first time, in all types of cells constituting an egg chamber (follicle cells, nurse cells and the oocyte) and in all stages of the early and mid-oogenesis, from germarium to stage 10, during which programmed cell death does not physiologically occur. Germarium and stages 7–8 were found to be the most sensitive developmental stages also in response to electromagnetic stress induced by the GSM and DCS fields and, moreover, germarium was found to be even more sensitive than stages 7–8.
© 2006 Elsevier B.V. All rights reserved. Keywords: Mobile telephony radiation; RF; GSM; DCS; Cell death; DNA fragmentation; Electromagnetic fields; Drosophila; Oogenesis
2) ELECTROMAGNETIC BIOLOGY AND MEDICINE Vol. 23, No. 1, pp. 29–43, 2004
Effect of GSM 900-MHz Mobile Phone Radiation on the Reproductive Capacity of Drosophila melanogaster
Dimitris J. Panagopoulos, 1,* Andreas Karabarbounis,2 and Lukas H. Margaritis 1 1Faculty of Biology, Department of Cell Biology and Biophysics, 2Faculty of Physics, Department of Nuclear and Particle Physics, University of Athens, Athens, Greece
ABSTRACT Pulsed radio frequency, (RF), electromagnetic radiation from common GSM mobile phones, (Global System for Mobile Telecommunications) with a carrier frequency at 900 MHz, ‘‘modulated’’ by human voice, (speaking emission) decreases the reproductive capacity of the insect Drosophila melanogaster by 50%–60%, whereas the corresponding ‘‘nonmodulated’’ field (nonspeaking emission) decreases the reproductive capacity by 15%–20%. The insects were exposed to the near field of the mobile phone antenna for 6 min per day during the first 2–5 days of their adult lives. The GSM field is found to affect both females and males. Our results suggest that this field-radiation decreases the rate of cellular processes during gonad development in insects. Key Words: RF; GSM radiation; Electromagnetic fields; Biological effects; Drosophila; Reproductive capacity.Leave a reply →