1,721,041 research outputs found
Histochemical study of cytochrome oxidase and succinate dehydrogenase activity in the chick embryo membranous labyrinth.
No full text
Recognition of values: structure and architecture. Italian experience in the field of retrofitting
No full textRecognition of values: structure and architecture. Italian experience in the field of retrofitting
No full textAcoustic Emission Monitoring and Thrust Network Analysis of the Central Nave Vaults of the Turin Cathedral
Full text linkDue to their age, elevation, and prolonged exposure to both static and dynamic loading conditions, historical constructions and old masonry structures such as medieval and Gothic cathedrals, bell towers, and other similar structures, are particularly vulnerable. The central nave vault of the Turin cathedral was subjected to an acoustic emission (AE) monitoring technique for structural integrity assessment. These findings are correlated with the evidence from the Thrust Network Analysis (TNA) performed on the cathedral’s central nave vault, taking into account the additional elements added at the start of the XXth century to lessen horizontal forces. In this situation, the analysis’s findings are strictly correlated to the vault’s 3D AE localization, which was obtained by the triangulation method
Histochemical studies of various enzymes connected with glycogen metabolism in the development of rhombencephalon in the chick embryo.
No full textInvestigating and monitoring central nave vaults of the Turin Cathedral with Acoustic Emissions and Thrust Network Analysis
Full text linkAncient masonry constructions and historical buildings, such as cathedrals, are exposed to considerable risks attributed to factors like ageing and long-term exposure to both dynamic and static variations in loading conditions. In this study, an innovative and promising monitoring approach was applied to assess the structural integrity of the vault in the central nave of the Turin Cathedral. Specifically, the outcomes obtained from Acoustic Emissions (AE) are correlated with the insights derived from the Thrust Network Analysis (TNA) conducted on the structure. This analysis considers the structural elements introduced early in the twentieth century to mitigate horizontal forces. Acoustic Emission (AE) is a commonly employed technique in structural monitoring to detect and analyze elastic waves generated by crack formation, providing valuable information about structural damage. The Thrust Network Analysis (TNA) is an approach that applies Heyman's principles to represent stress in masonry vaults. This method models the stresses as a discrete network of forces, achieving equilibrium with gravitational loads. In this context, the results obtained by TNA analysis are strictly correlated with AE localization results
THE AMPULLAE OF THE INNER EAR IN THE LIZARD PODARCIS S. SICULA. ULTRASTRUCTURAL ASPECTS
No full textThe inner ear ampullae of the lizard Podarcis s. sicula were studied to determine better the ultrastructure of ampullar epithelial cells. Our study confirmed that the ampullae of the membranous labyrinth of this lizard are similar to those of other vertebrates in their ultrastructural aspect. Moreover, our observations revealed a special type of dark cells, restricted to a small area of the crista. They appeared similar to type II sensory cells and showed a dark, finely granular cytoplasm, containing numerous mitochondria and ribosomes, extensive Golgi apparatus and abundant glycogen. The morphology of these cells suggests that they may be special sensory cells, or different stages of sensory cells, probably implied in the crista cell turnover described for some vertebrate groups
THE AMPULLAE OF THE INNER EAR IN THE LIZARD PODARCIS S. SICULA. ULTRASTRUCTURAL ASPECTS
No full textThe inner ear ampullae of the lizard Podarcis s. sicula were studied to determine better the ultrastructure of ampullar epithelial cells. Our study confirmed that the ampullae of the membranous labyrinth of this lizard are similar to those of other vertebrates in their ultrastructural aspect. Moreover, our observations revealed a special type of dark cells, restricted to a small area of the crista. They appeared similar to type II sensory cells and showed a dark, finely granular cytoplasm, containing numerous mitochondria and ribosomes, extensive Golgi apparatus and abundant glycogen. The morphology of these cells suggests that they may be special sensory cells, or different stages of sensory cells, probably implied in the crista cell turnover described for some vertebrate groups
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