FRLP - I+D+i - CENTROS - LEMAC - TRABAJOS DE INVESTIGACIÓN

Permanent URI for this collectionhttp://48.217.138.120/handle/20.500.12272/1756

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Author: search.filters.author.Correa, María

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    Biodegradation and biodeterioration of wooden Heritage, role of fungal succession
    (International Journal of Conservation Science, 2016) Alfieri, Paula; García, Renato; Rosato, Vilma; Correa, María
    Wood from heritage is usually attacked by wood-decay fungi generating mainly loss of dimensional and structural stability. The study of wood biodegradation process and its mechanism allow the obtaining of tools for wood conservation. In this paper, wood biodegradation and biodeterioration processes were studied in order to acquire a direct and visual indicator of the beginning of wood degradation. This indicator will allow the consolidation and protection of wood before it will be structurally compromised. Wood degradation conditions found in turntable were reproduced in laboratory by accelerated processes: environment degradation was developed by fluctuation cycles of humidity and temperature. Biological degradation was performed using wood decay fungus isolated from wooden heritage samples. The wood samples were inoculated with an equal amount of mycelia until abortive basidiomata emerged. The result analysis indicated that even though each species occupies particular niches, first settlers (environmental fungi) would generate a material more bioreceptive for wood decay fungi being replaced each other as dynamic communities. Consequently, environmental fungi allow the wood decay fungi to colonise and exploit better their ecological niche (succession). It was concluded that the appearance of first settlers is therefore a reliable visual indicator of the need of wood consolidation in order to preventing irreversibly wooden heritage loss.
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    Lichens growing on painted metal plates
    (Journal of Basic and Applied Research International, 2015) García, Renato; Correa, María; Rosato, Vilma
    This study was based on the description of different species of lichens which were growing on metal plates exposed to the weather conditions in La Plata, Buenos Aires Province, Argentina. Among the six species observed, Caloplaca cinnabarina was the most common. Lichen species were identified by observation under optical microscope and chemical reactions. The chemical composition of the paint was analyzed by IRS and the metal composition of the plates by SEM and EDS. SEM analysis also revealed paint cracking around the lichen and paint particles trapped in the thallus.