Search results for " XRF."
showing 10 items of 24 documents
VALUTAZIONE DELL'EFFICACIA E DURABILITÀ DI PROTETTIVI NANOSTRUTTURATI APPLICATI SU CAMPIONI DI MARMO DI CARRARA
2014
An integrated analytical approach can be useful to study the effectiveness of preservation treatment for Carrara marble surfaces, carried out for testing commercial products which are based on nano-structured silica oxides. Variation in hydrophobic properties, porosity distribution, and chemical composition of treated surfaces have been studied. With this aim, contact angle evaluation, NMR, XRF measurements have been used. Changes of above mentioned physical and chemical characteristics have been evaluated before and after aging in saline chamber of the treated and untreated samples. Moreover, the effectiveness of ultrasonic treatment in “safe” removal of the products from treated surfaces …
The use of a European coinage alloy to compare the detection limits of mobile XRF systems. A feasibility study
2007
The investigation of archaeological and historical materials makes use of techniques that, though borrowed from other fields of research and industrial production, frequently have to be 're-invented' because of peculiar characteristics of the analysed objects. Artistic relevance, limited movability, compositional and structural heterogeneity radically change the experimental approach and often require ad hoc designed equipment. These considerations also apply to x-ray fluorescence, especially regarding mobile systems. The extensive development and use of mobile spectrometers has produced an extremely diversified context and created the need for common criteria to evaluate their performances…
Studio integrato di rocce sedimentarie da cave siciliane di interesse storico-artistico
2005
Polychrome wood sculpture depicting The Madonna del Soccorso or della Mazza from the Archdiocese of Palermo: an integrated analytical approach for th…
2018
In this study the Madonna del Soccorsoo della Mazza wooden sculpture has been analysed by an interdisciplinary and integrated approach. The polychrome sculpture, dating back to the 18thcentury, comes from the church of the Madonna del Soccorso or della Mazza (1604) situated in Via Maqueda, in Palermo and it was placed on the main recess of the altar. All steps of the conservation project, from the preliminary study to the choice of materials and the restoration procedures have been accompanied and supported by diagnostic and scientific analysis. In order to evaluate the state of conservation of the sculpture and the technique employed to construct the support, computer tomography study was …
Caratterizzazione tecnologica di mattoni in maiolica prodotti nell'area delle Madonie (Sicilia centro-settentrionale) tra il XVI e il XVIII secolo.
2010
NDT for the detection and characterization of superficial treatments on stone material from archaeological sites of Merida (Spain)
2014
Confronto XRF – LIBS per la caratterizzazione chimico-fisiche dei materiali lapidei provenienti dal teatro greco-romano di Taormina
2008
Vengono messe a confronto due tecniche spettroscopiche, la fluorescenza a raggi X (XRF) e la ablazione indotta da laser pulsato (LIBS), al fine di caratterizzare la composizione chimico-fisica di materiali lapidei naturali e non provenienti dal teatro Greco-Romano di Taormina. Entrambe le tecniche permettono un’analisi integrata, offrendo la LIBS la possibilità di ottenere informazioni stratigrafiche. Verranno presentati i risultati di analisi XRF e LIBS effettuate in situ e in laboratorio sui campioni prelevati nel teatro. L’interpretazione quantitativa delle analisi LIBS è stata effettuata mediante una tecnica standarless, ossia che non richiede l’uso di standard e denominata tecnica Cali…
Investigations on standard pigments with multispectral and XRF analysis
2008
ART AND TECHNIQUE: ARTISTIC REPRODUCTION OF THE ANCIENT BRONZE IL GUERRIERO DA PETRALIA SOTTANA
2016
The reproduction of artistic objects is useful for museological, teaching, and commercial purposes. In some cases, the reproduction is carried out to replace the originals located in outdoor environments and to prevent the deterioration due to weathering or pollution. This article describes the different phases that led to the reproduction of the Il Guerriero da Petralia Sottana. The observation of stylistic characteristics and the physical-chemical investigation were carried out in order to obtain information about the composition of the alloy and the technological properties of the artifact by using Optical Microscopy and X- ray Fluorescence. The reproduction in wax was performed by using…