Search results for " beni culturali"
showing 10 items of 230 documents
Un archivio digitale per raccontare Ustica
2022
Ustica è un pezzettino di terra nel Mediterraneo. Tutti i suoi numeri sono piccoli, quelli che ne definiscono l’area, il perimetro, l’altitudine, le distanze, gli abitanti; ma questi sono inversamente proporzionali all’importanza della sua storia, quella di una terra emersa, residuo di un esteso apparato vulcanico che vive inabissato sotto il mare. Ustica è collocata a nord-ovest di Palermo da cui dista circa 67 km, così vicina in linea d’aria da far parte della sua area metropolitana, con una superficie che copre poco meno di 9 kmq, e una popolazione, inferiore ai 1500 abitanti. Le più antiche forme di vita sull’isola risalgono al Neolitico, a cui seguirono gli insediamenti di diversi …
Percorso didattico MBC. Management dei beni culturali nel territorio di Halaesa. Un distretto turistico al confine tra due parchi?
2008
Si presentano le ragioni e le modalità di svolgimento di un percorso didattico (centrato sulle competenze manageriali) per il conseguimento di un titolo di Master di II livello in Progettazione e Gestione per la conservazione dei BB.CC.AA.; si introducono, quindi, i contenuti e i prodotti del lavoro applicativo svolto dal gruppo classe guidato da tutori e docenti dello stesso Master, nell’ambito di un protocollo di collaborazione con il Consorzio intercomunale Vallata dell’Halaesa.
Gas chromatography-mass spectrometry characterization of the varnish and glue of an ancient 18th century double bass.
2007
A GC–MS investigation is conducted on the double bass “Panormus”, property of Conservatorio di Musica “Vincenzo Bellini” in Palermo. The most important components of the varnish (fatty acids) and of the glue (proteinaceous amino acids), with which the musical instrument was treated in the past, are determined. The analyses are carried out by prior derivatization of fatty acids by acidic methanol and of amino acids by acidic methanol and trifluoroacetic anhydride (TFAA). Analytes identification is achieved by direct comparison with several reference materials and the use of a digitized library.
Voltammetric determinations of platinum and rhodium in particulate of Palermo (Italy) area
2012
Traffic has an important impact on the air quality which affects both the environmental and human health. Since the introduction of PGE-containing catalytic converters, a number studies have been undertaken to determine the effects of PGE emissions on human and to environment. This requires the development of good analytic methods to measure Pt and Rh concentrations in environmental matrices, as well to estimate background concentrations. In this paper are presented the results concerning Pt and Rh concentrations in PM10 samples collected at five stations within the urban area of Palermo. The highest mean values (Pt= 13 pg/m3, Rh=9.8 pg/m3) were recorded at an urban station, and the lowest …
Recover and reutilization of waste matter of coffee preparation. An experiment for Environmental Science Course
2001
This work is designed as an experience for organic and analytical chemistry laboratories involved in environmental science courses. It achieves the following goals: 1. It shows that environmental samples are not homogeneous (1). 2. It is possible to build up students’ confidence in manipulating everyday matter when they are beginning to study scientific subjects and to introduce some methods of sample preparation in analytical chemistry. 3. It demonstrates some fundamental analytical principles (acid–base and redox analysis, solid–liquid and liquid– liquid extraction, etc.). 4. It shows the importance of instrumental analysis, such as gas chromatography, atomic absorption spectroscopy and e…
Preliminary study on analysis and removal of wax from a Carrara marble statue
2015
This preliminary study has mainly focused on the wax identification by nuclear magnetic resonance (NMR) and removal. Wax is used for many purposes in the field of art as protective coatings on wooden, stone or metal objects. From the comparison of the spectra H NMR and in particular with the correspondence of the resonance peaks of the samples taken from the statue and beeswax and paraffin, we can conclude that the wax applied on the statue surface is beeswax. From our data, it can be concluded that, to remove the beeswax, from any stone support, the more effective solvent is the mixture of cyclohexane/ethyl acetate. The removal percentages ranged from 19 to 99%. Lower percentages of remova…
Hydroxypropyl Cellulose Films Filled with Halloysite Nanotubes/Wax Hybrid Microspheres
2021
The design of novel nanocomposite films based on hydroxypropyl cellulose (HPC) and wax/halloysite hybrid microspheres has been reported. In particular, we first prepared wax/clay Pickering emulsions which were characterized by thermogravimetric analysis and microscopy. SEM images allowed more detailed insights on the nanotubes disposition at the wax/water interface, acting as an outer stabilizing shell. Therefore, the cellulosic biopolymer was added, and it was found that HPC enhances the colloidal stability of the particles, preventing their coalescence and sedimentation. The preparation of the composite films was carried out by the solvent casting method, which enabled the development of …
Laboratory of X-ray Fluorescence (XRF)
2020
In this laboratory activity, the X-ray Fluorescence Spectroscopy technique is introduced. The goal of the laboratory is to show to the students the theory and the applications of the above technique in the field of underwater archaeology. After a brief introduction about the theory and the instrumentations, some case studies are showed. The students thus see the practice application of the portable XRF Tracer III SD Bruker AXS spectrometer having a Rhodium tube as an X-ray generator and a silicon drift XFlash ® with Peltier cooling system as a detector to some finds saved at the Museo Archeologico Antiquarium ex Stabilimento Florio delle tonnare di Favignana e Formica. The identification of…
Elemental and Lead Isotopic Data of Copper Finds from the Singen Cemetery, Germany – a Methodological Approach of Investigating Early Bronze Age Netw…
2011
International audience
La spettroscopia ad ablazione laser per analisi stratigrafiche: esempi di applicazioni per lo studio dei beni culturali
2011
La spettroscopia ad ablazione laser (LIBS), a differenza di altre tecniche d'indagine, permette di condurre analisi stratigrafiche anche direttamente sul campione tramite impulsi consecutivi sullo stesso punto. Le attività condotte hanno riguardato l'ottimizzazione dei parametri strumentali (laser energy, delay, exposition time) per verificare la possibilità di ottenere profili di profondità degli elementi chimici costituenti materiali di differente tipologia (bronzi archeologici, lapidei, materiali pittorici, etc.), valutando anche l'influenza delle variabili presenti (spessori, composizione, proprietà del plasma). Tale approccio metodologico, seppur micro-distruttivo, evita la necessità d…