Sophie Leonard
The bio-stimulated healing of cracks in historical and newly designed lime mortar samples was the primary focus of this study. The investigation began with the thorough characterization of historical mortars. Next, a compatible conservation mortar was designed and characterized, with the formation of contact zones between the original and conservation mortars being the primary focus. The design of a two-component liquid bio-stimulating crack-sealing agent was the next step: nutrients and bacteria culture of Sporosarcina pasteurii DSM 33 the potential for bio-stimulated surface-crack repair was investigated using historical and conservation mortar samples. The 150-day experiment enabled the ureolytic bacteria Sporosarcina pasteurii DSM 33 to precipitate calcium carbonate into cracks and repair the tested materials' damaged surfaces. Over the course of 150 days, the healing phenomenon was continuously monitored. Using optical microscopy, scanning electron microscopy (SEM), XRF, and XRD analyses, the morphology, chemical, and structural characteristics of the deposits created in or on the surface cracks were examined in particular. The obtained results provide useful information for putting the developed system to use in real-world environmental conditions as a solution for the long-term, sustainable preservation of traditionally prepared mortars in architecture. Keywords WBRT; SRS; lung cancer; PCI and neurotoxicity
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