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Tesi di dottorato in scienze matematiche e fisiche >
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http://hdl.handle.net/2108/603
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| Title: | A Polyphasic approach to the study of EPS-producing heterocystous cyanobacteria from biofilms in Roman hypogean monuments |
| Authors: | Albertano, Patrizia
Bellezza, Simona |
| Keywords: | Roman hypogean monuments
biodeterioration
heterocystous cyanobacteria
polyphasic approach
exopolysaccharides (EPS)
cytochemistry
uronic acids
cyanobacteria: taxonomy
molecular phylogeny
16S rRNA gene |
| Issue Date: | 1-Sep-2008 |
| Abstract: | Roman hypogea (e.g. the Roman catacombs) are man-made low-light environments of great archaeological and cultural interest. Few species of cyanobacteria are able to colonise the lithic surfaces inside the catacombs, where they live in close vicinity to the artificial lamps associated with green algae, diatoms and bacteria in the life-form of biofilms. Biofilm formation is due to the production of an exopolymeric matrix mostly composed of exopolysaccharides and it is well known that these polymers are involved in the aesthetic and structural alteration of the properties of artistic surfaces (biodeterioration), particularly when rich in negatively charged groups.
Based on this information, the aim of the present work was firstly the identification of the cyanobacterial species involved in biodeterioration process and dominating the biofilms collected in Roman hypogea, and secondly the characterisation of the exopolysaccharides that they secrete to form the mucous matrix of the biofilm.... |
| Description: | 19. ciclo |
| URI: | http://hdl.handle.net/2108/603 |
| Appears in Collections: | Tesi di dottorato in scienze matematiche e fisiche
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Description |
Size | Format |
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| Bellezza_TESI.pdf | | 4940Kb | Adobe PDF | View/Open |
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