Accession Number : ADA182890

Title :   Biological Effects of Millimeter-Wave Irradiation.

Descriptive Note : Final rept. 15 Apr 84-31 Mar 86,

Corporate Author : UTAH UNIV SALT LAKE CITY DEPT OF ELECTRICAL ENGINEERING

Personal Author(s) : Gandhi,Om P ; Hill,Douglas W ; Furia,Luciano ; Iskander,Magdy F ; Ghodgaonkar,Deepak

PDF Url : ADA182890

Report Date : Apr 1987

Pagination or Media Count : 93

Abstract : Experiments were conducted to verify the reported high degree of sensitivity of growth rates of yeast cultutres to frequency of millimeter-wave irradiation in the band 41.650 to 41.798 GHz. A new irradiation chamber was designed and built to allow simultaneous irradiation and sham irradiation of recirculating suspension of saccharomyces cerevisiae that were maintained with a temperature difference of less than 0.01 C. No difference larger than plus or minus 4% was ever detected in the growth rates at any of the highly stabilized (within plus or minus 50 hert) irradiation frequencies for which the effects had been reported by earlier workers. Experiments were also performed to determine the Raman Spectra of cultures of bacillus megaterium to investigate if these are dependent on the stage of their life cycle as reported by Webb et al. The results were negative. A further study to investigate the ability of millimeter waves to induce conformational changes in lipid bilayers of dipalmitoylphosphatidycholine (DPPC) liposomes below and above the transition temperature of 41 degreesC also gave negative results. For these experiments the conformational characteristics of the liposomes were evaluated using Raman spectra with and without millimeter-wave irradiation at 41.650 GHz.

Descriptors :   *MILLIMETER WAVES, *RADIATION EFFECTS, *YEASTS, *CULTURES(BIOLOGY), RESPONSE(BIOLOGY), GROWTH(GENERAL), RATES, FREQUENCY, IRRADIATION, LAYERS, LIPIDS, RAMAN SPECTRA, BACILLUS, LIFE CYCLES, CYTOPLASM, TRANSITION TEMPERATURE

Subject Categories : Radiobiology
      Biology
      Microbiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE