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Proceedings Paper

Fourier transform Raman spectroscopic studies of encrustations formed at the lichen-substratum interface
Author(s): Howell G.M. Edwards; Dennis W. Farwell; Ian R. Lewis; Mark R.D. Seaward
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Paper Abstract

FT-Raman microscope spectra of lichen-substratum samples of Xanthoria parietina and Ochrolechia parella growing in situ on sandstone have been obtained. The presence of small amounts of calcium oxalate and evidence for biodeterioration by lichen metabolic by-products is confirmed spectroscopically. Comparisons are made with similar studies of aggressive colonization by the high oxalate-producing lichen Dirina massiliensis forma sorediata on Renaissance frescoes. Spatial discrimination of the Raman microprobe technique for high and low oxalate-producing lichens is demonstrated.

Paper Details

Date Published: 31 January 1994
PDF: 2 pages
Proc. SPIE 2089, 9th International Conference on Fourier Transform Spectroscopy, (31 January 1994); doi: 10.1117/12.166606
Show Author Affiliations
Howell G.M. Edwards, Univ. of Bradford (United Kingdom)
Dennis W. Farwell, Univ. of Bradford (United Kingdom)
Ian R. Lewis, Univ. of Idaho (United States)
Mark R.D. Seaward, Univ. of Bradford (United Kingdom)

Published in SPIE Proceedings Vol. 2089:
9th International Conference on Fourier Transform Spectroscopy
John E. Bertie; Hal Wieser, Editor(s)

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