2 documents found, page 1 of 1
Purple Biodeterioration in Parchment: a Case in the Alcobacense Collection
Pinheiro, C; Miller, A; Bhattacharya, S; Vaz, P; Caldeira, A Teresa; Casanova, CThe understanding of purple biodeterioration, or the appearance of purple tinged stains in parchment, has seen a sharp evolution in the last few years. Modern molecular analysis of the DNA, using Next-Generation Sequencing, have made it possible to hypothesize a chain of events triggered by the presence of Archaeobacteria in the parchment, a succession theory that builds on the presence of complex biological co...
Assessing aesthetic and structural deterioration in historic buildings – a cont...
Dias, L; Rosado, T; Bhattacharya, S; Candeias, A; Caldeira, A T; Mirão, JAn important part of our cultural heritage assets is built of natural stone since it has always been a material of excellence due to its inherent characteristics. Despite the physical and mechanical properties that give relatively long durability as a construction material, some characteristics are less durable, namely color or eventual surface finishes. The alteration of its aesthetic features may be followed ...