Infrared spectroscopy over the 2.9-3.9 microns waveband in biochemistry and astronomy

Details Infrared spectroscopy over the 2.9-3.9 microns waveband in biochemistry and astronomy Infrared spectroscopy over the 2.9-3.9 microns waveband in biochemistry and astronomy

Apr 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982ap%26ss..83..405h&link_type=abstract

Astrophysics and Space Science, vol. 83, no. 1-2, Apr. 1982, p. 405-409.

Astronomy and Astrophysics

Astrophysics

47

Astronomical Spectroscopy, Bacteria, Biochemistry, Galactic Nuclei, Infrared Spectroscopy, Escherichia, Milky Way Galaxy, Polymers

Scientific paper

Astronomical data for the source GC-IRS 7 are compared with infrared spectra of microorganisms sealed within KBr disks heated in an inert atmosphere up to temperatures of at least 380 C. A remarkably close correspondence is shown between the astronomical spectrum and biology, implying the possibility of a firm spectroscopic identification. Transmittance curves over the wavelength range 2.6-3.9 microns were obtained for E. coli at room temperature and at 350 C and for dehydrated vegetative yeast cells. Thermal stability of the biological materials was found up to about 400 C, and the transmittance curves show a surprising invariance of shape between 3.3 and 3.5 microns for both E. coli and the eukaryote. One spectrum could be explicable on the basis of a single grain model subject to irradiation by hard ultraviolet and X-ray quanta. A search for cosmically relevant organic polymers to produce an even tolerable fit to the data led to negative results.

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