AMBIENTUM BIOETHICA BIOLOGIA CHEMIA DIGITALIA DRAMATICA EDUCATIO ARTIS GYMNAST. ENGINEERING EPHEMERIDES EUROPAEA GEOGRAPHIA GEOLOGIA HISTORIA HISTORIA ARTIUM INFORMATICA IURISPRUDENTIA MATHEMATICA MUSICA NEGOTIA OECONOMICA PHILOLOGIA PHILOSOPHIA PHYSICA POLITICA PSYCHOLOGIA-PAEDAGOGIA SOCIOLOGIA THEOLOGIA CATHOLICA THEOLOGIA CATHOLICA LATIN THEOLOGIA GR.-CATH. VARAD THEOLOGIA ORTHODOXA THEOLOGIA REF. TRANSYLVAN
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The STUDIA UNIVERSITATIS BABEŞ-BOLYAI issue article summary The summary of the selected article appears at the bottom of the page. In order to get back to the contents of the issue this article belongs to you have to access the link from the title. In order to see all the articles of the archive which have as author/co-author one of the authors mentioned below, you have to access the link from the author's name. |
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STUDIA BIOLOGIA - Issue no. 1 / 2019 | |||||||
Article: |
PURPLE SPOTS ON ANCIENT PARCHMENTS VS RED HEATS ON PRESENT-DAY LEATHERS: THE UNVEILED SECRET OF THE SALT-CURED HIDES. Authors: NICOLETTA PERINI, FULVIO MERCURI, SILVIA ORLANDUCCI, MARIA CRISTINA THALLER, ALESSANDRO RUBECHINI, DOMENICO CASTIELLO, VALERIO TALARICO, LUCIANA MIGLIORE. |
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Abstract: Leather products, used in many ways over centuries, can easily undergo biodeterioration. Modern hides are often damaged by red patches, known as red heats; historical parchments show similar signs of biodeterioration, the purple spots. A two-phases ecological succession explained the parchment biodeterioration process, identifying Halobacterium salinarum as the main culprit of purple spots, entering together with salt into the hide during the brining, in the first phase; whilst, the second phase changes with the history of each parchment (Migliore et al., 2017, 2019). To evaluate if similar biodeterioration dynamics can be identified in both leather and parchment, a multidisciplinary study was performed on present-day leathers. This approach consisted of standard cultivation methods and molecular, chemical and physical updated technologies, as Next-Generation Sequencing (NGS), Raman spectroscopy and Transmitted Light Analysis (LTA). As a whole, (i) NGS demonstrated that leathers share the same triggering halophilic agents responsible for the parchment damage; (ii) Raman analyses detected bacteriorhodopsin in red patches; (iii) LTA showed that chrome tanning, conversely to parchment procedure, chemically stabilizes even the damaged areas, making leather products persistent. Keywords: brine cured hides, H. salinarum, purple spots, red heat deterioration |
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