United States Department of Transportation
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Safety of High Speed Guided Ground Transportation Systems - The Biological Effects of Maglev Magnetic Field Exposures
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1993-08-01
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By Groh, K.
[PDF-2.99 MB]
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Alternative Title:Safety of High Speed Guided Ground Transportation Systems:;The Biological Effects of Maglev Magnetic Field Exposures;
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Edition:Final Report Sept. 1990 - Dec. 1992
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Abstract:This report describes selected biological effects on transformed human cell lines and on rats from exposure to simulated
maglev magnetic fields (MFs). Rats (n = 6 per group) were exposed at various times throughout the 24-h day to MFs
simulating the de and complex ac components of the German TransRapid TR-07 maglev prototype vehicle. Expected ride
times as long as 4 h and MF intensities from 50*1500 mG measured for the TR-07 were tested, up to MF levels predicted
for superconducting magnet-powered maglev vehicle compartments (1 mG-1.75 G). Maglev-1 ike HF exposures up to 7 times
the intensity produced by the TR-07 had no effect on cultured growth of four human cell lines or on chemically Induced
differentiation compared to control, unexposed cultures. Changes in the amount of rat pineal melatonin and serotonin-NacetyI
transferase (NAT), which have been shown by others to be decreased under a range of eletromagnetfc field (EMF)
exposure frequencies and intensities, were not observed for TR-07-1 ike MFs. Intermittent exposure to de-component
maglev MFs (1-2 C) significantly depressed nighttime (control) levels of NAT, with weak effects on melatonin and NAT
seen with 1- to 2-G-intensity intermittent (ac component alone) and continuous maglev (ac ♦ dc) MF exposures. These
results should be further examined, since they suggest that ac component TR-07-like MFs and time-varying EMFs at
superconducting maglev intensities produce biological effects.
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