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|Title: ||Effect of fungal colonization on mechanical performance of cork|
|Authors: ||Silva Pereira, Cristina,|
Soares, Giselle A. M.
Oliveira, Ana C.
Rosa, Maria Emılia
San Romao, Maria Vitoria
|Keywords: ||Biodegradation of cork|
|Issue Date: ||2005|
|Publisher: ||International Biodeterioration & Biodegradation 57 (2006) 244–250|
|Abstract: ||The industrialization of traditional processes relies on the scientific ability to understand the empirical evidence associated with
traditional knowledge. Cork manufacturing includes one operation known as stabilization, where humid cork slabs are extensively
colonized by fungi. The implications of fungal growth on the chemical quality of cork through the analysis of putative fungal metabolites
have already been investigated. However, the effect of fungal growth on the mechanical properties of cork remains unexplored. This
study investigated the effect of cork colonization on the integrity of the cork cell walls and their mechanical performance. Fungal
colonization of cork by Chrysonilia sitophila, Mucor plumbeus Penicillium glabrum, P. olsonii, and Trichoderma longibrachiatum was
investigated by microscopy. Growth occurred primarily on the surface of the cork pieces, but mycelium extended deeper into the cork
layers, mostly via lenticular channels and by hyphal penetration of the cork cell wall.
In this first report on cork decay in which specific correlation between fungal colonization and mechanical proprieties of the cork has
been investigated, all colonizing fungi except C. sitophila, reduced cork strength, markedly altering its viscoelastic behaviour and reducing its Young’s modulus.|
|Appears in Collections:||ITQB: PECM - Artigos em revista internacional com arbitragem científica|
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