Biological origin of major chemical disturbances on ecclesiastical architecture studied by Fourier Transform Raman spectroscopy

摘要: Lichens, formerly considered as weathering agents in a geological context, are shown to be capable of biodeteriorating stone substrata within relatively short time-scale. Detailed Raman spectroscopic studies have demonstrated the highly destructive properties calcium oxalate produced by lichen thalli. Dirina massiliensis forma sorediata is chemically disturbing depths almost 2 mm under 12 years and converting into substantial quantities oxalate. Studies disfigurement English church walls assumed been rendered with decorative or protective surface via restoration, also proved spectroscopically result this lichen’s biodeteriorative action. © 1997 John Wiley & Sons, Ltd.