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Göteborgs universitets publikationer

Biochemical fingerprints in marine-archaeological wood – an overview of a research project

Författare och institution:
Yvonne Fors (Institutionen för kulturvård)
Publicerad i:
Proceeding title: Condition 2015. Conservation and Digitalization. Editors: Katarzyna Piotrowska and Piotr Konieczny. Conference: Condition 2015. Conservation and Digitalization, National Maritime in Gdansk, 19-22 May 2015, s. 79-82
Konferensbidrag, refereegranskat
Sammanfattning (abstract):
Biochemical fingerprints in marine-archeological wood. Marine-archaeological wood is generally considered well-preserved compared to organic archaeological finds in terrestrial sites. The seabed environment may however inflict wood degradation and contamination with consequences for the long-term preservation. The major reasons for these preservation challenges and for the tremendous undertaking of conserving waterlogged wood can be traced to biochemical seabed activities. Biological degradation in form of fungi and bacteria are weakening the wood cells and is associated with accumulation of inorganic elements, such as sulfur and iron, which in turn may lead to the formation of different acids in the wood. This motivates studies of the accumulation profile of elements in wood from a number of archaeological shipwrecks. Scanning wood cores with X-ray Fluorescence (XRF) enables detailed mapping of the concentration and distribution of inorganic elements at narrow steps throughout the wood. This revealed a strong correlation between the sulfur and iron profiles, suggesting these elements to be accumulated simultaneously through the formation of iron sulfides. Variations in accumulation pattern of total sulfur and iron in wood from different shipwrecks can be explained by differences in the seabed environment. Submerged wood provides strongly environment-adaptive ecosystems of high microbial diversity and activity. Therefore the sulfur and iron profile may serve as a biochemical “fingerprint” of the seabed environment. However, to connect the variations to key biogeochemical mechanisms in the environment, deep knowledge about seabed interactions is essential. The state of preservation in terms of biological degradation and accumulation of wood could then be predicted from basic geochemical data.
Ämne (baseras på Högskoleverkets indelning av forskningsämnen):
Kemi ->
Analytisk kemi
XRF, marine archaeological wood, cultural heritage, conservation science
Postens nummer:
Posten skapad:
2016-04-11 11:06
Posten ändrad:
2016-04-11 11:25

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