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Electronic Journal of Biotechnology
Universidad Católica de Valparaíso
ISSN: 0717-3458
Vol. 13, No. 3, 2010
Bioline Code: ej10028
Full paper language: English
Document type: Short Communication
Document available free of charge

Electronic Journal of Biotechnology, Vol. 13, No. 3, 2010

 en Biodeterioration patterns found in dammar resin used as art material
Romero-Noguera, Julio; Martín-Sánchez, Inés; López-Miras, María del Mar; Ramos-López, José Miguel & Bolívar-Galiano, Fernando

Abstract

Since the middle of the XIX century, when dammar became popular in Occident, this natural resin is one of the most used in art painting techniques as final protective coating (varnish) as well as a component of pictorial media. The present work is the first approach to the study of the microbiological biodeterioration of this artistic material, which can seriously affect the appearance and integrity of works of art when bad conservation conditions -especially high humidity levels- take place. 12 microorganisms, fungi and bacteria, came from collection and from oil paintings affected by biodeterioration patterns, were inoculated on test specimens prepared with varnish dammar. These were incubated and analyzed by GC-MS to determine both the microbiological capacity of growth and chemical alteration on the resin. Some of the studied microorganisms have shown patterns of deterioration similar to those found in works dedicated to natural or accelerated photochemical ageing of triterpenoid varnishes.

Keywords
bacteria, biodeterioration, dammar, fungi, GC-MS.

 
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