Fourier transform Raman spectroscopic studies of encrustations formed at the lichen-substratum interface

Howell G.M. Edwards; Dennis W. Farwell; Ian R. Lewis; Mark R.D. Seaward

doi:10.1117/12.166606

31 January 1994 Fourier transform Raman spectroscopic studies of encrustations formed at the lichen-substratum interface

Howell G.M. Edwards, Dennis W. Farwell, Ian R. Lewis, Mark R.D. Seaward

Author Affiliations +

Proceedings Volume 2089, 9th International Conference on Fourier Transform Spectroscopy; (1994) https://doi.org/10.1117/12.166606
Event: Fourier Transform Spectroscopy: Ninth International Conference, 1993, Calgary, Canada

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.

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Howell G.M. Edwards, Dennis W. Farwell, Ian R. Lewis, and Mark R.D. Seaward "Fourier transform Raman spectroscopic studies of encrustations formed at the lichen-substratum interface", Proc. SPIE 2089, 9th International Conference on Fourier Transform Spectroscopy, (31 January 1994); https://doi.org/10.1117/12.166606

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