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Non-destructive laser based techniques for biodegradation analysis in cultural heritage

机译：基于非破坏性激光的文化遗产生物降解分析技术

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In the frame of the COBRA (Conservation of Cultural Heritage through Radiation and Enabling Technologies) Regional project, several historical sites have been object of study by means of non-destructive techniques to analyze different kinds of artworks from different points of view, as structural modification or chemical degradation. The availability of information on the state of health of artworks quickly and as complete as possible can represent a great advantage for the optimization of the conservation and restoration actions. To this aim, several prototypes based on non-destructive laser based techniques have been developed at ENEA and encouraging results have been obtained by their application to some cases study supported by COBRA project.In this work, some results of the study of the Greek Chapel in the Priscilla's Catacombs in Rome performed by LIF (Laser Induced Fluorescence) Scanning, giving information regarding the surface chemical composition, will be reported. Particular attention has been devoted to the area indicated by the site referents as of special interest for the presence of an evident biological attack. In addition to the characterization of extended biofilms, LIF was also able to detect microorganisms from areas where biodegradation is not evident, suggesting the possibility of its early detection. This result can be of great usefulness for the site conservation. The analyses by standard laboratory techniques (e.g. microscope observations) prompt us to exclude the presence of photosynthetic microorganisms. For an easy and understandable vision of the obtained results, collected by different instruments, a post-processing and data fusion phase was needed.
机译：在COBRA框架（通过辐射和支持技术保护文化遗产）区域项目，几个历史遗址是通过非破坏性技术研究的研究对象，以分析来自不同观点的不同类型的艺术品，如结构修改或化学降解。有关艺术品健康状况的信息快速和尽可能完整的信息可以代表优化保护和恢复行为的重要优势。为此目的，基于非破坏性激光的技术的若干原型已经在恩亚伊斯队开发，并通过其应用于Cobra项目支持的一些案例研究获得了令人鼓舞的结果。这项工作，希腊教堂研究的一些结果在LiF（激光诱导的荧光）扫描的罗马的Priscilla的潮涂层中，将报告有关表面化学成分的信息。特别注意的是，在存在明显的生物攻击的情况下，该网站指示的区域指示的区域。除了扩展生物膜的表征外，LIF还能够检测生物降解不明显的区域的微生物，表明其早期检测的可能性。这一结果对于网站保护可能具有很大的实用性。通过标准实验室技术（例如显微镜观测）分析提示我们排除光合微生物的存在。对于所获得的结果的简单易懂的愿景，需要由不同仪器收集，后处理和数据融合阶段。

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