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showing 10 items of 3539 documents
Architetture perdute/Architetture ricostruite. Ricostruzioni virtuali attraverso la fotografia d’epoca: un caso studio
2013
I grandi eventi bellici, le intemperie e l'incuria dell'uomo hanno condotto alla rapida rovina di buona parte del patrimonio culturale; il presente contributo affronta il tema della documentazione del patrimonio culturale proponendo una metodologia di ricostruzione congetturale basata sull'uso di fonti iconografiche e su procedure di restituzione prospettica da fotografie d'epoca. Oggetto dello studio è il Castellammare di Palermo, demolito nel 1922 per volontà della stessa amministrazione comunale.
Modular Small Diameter Vascular Grafts with Bioactive Functionalities.
2015
We report the fabrication of a novel type of artificial small diameter blood vessels, termed biomimetic tissue-engineered blood vessels (bTEBV), with a modular composition. They are composed of a hydrogel scaffold consisting of two negatively charged natural polymers, alginate and a modified chitosan, N,O-carboxymethyl chitosan (N,O-CMC). Into this biologically inert scaffold two biofunctionally active biopolymers are embedded, inorganic polyphosphate (polyP) and silica, as well as gelatin which exposes the cell recognition signal, Arg-Gly-Asp (RGD). These materials can be hardened by exposure to Ca(2+) through formation of Ca(2+) bridges between the polyanions, alginate, N,O-CMC, and polyP…
Use of electronic nose to determine defect percentage in oils. Comparison with sensory panel results
2010
Abstract An electronic nose based on an array of 6 metal oxide semiconductor sensors was used, jointly with linear discriminant analysis (LDA) and artificial neural network (ANN) method, to classify oils containing the five typical virgin olive oil (VOO) sensory defects (fusty, mouldy, muddy, rancid and winey). For this purpose, these defects, available as single standards of the International Olive Council, were added to refined sunflower oil. According to the LDA models and the ANN method, the defected samples were correctly classified. On the other hand, the electronic nose data was used to predict the defect percentage added to sunflower oil using multiple linear regression models. All …
Teschoviruses and sapeloviruses in faecal samples from wild boar in Spain
2013
Teschovirus and Sapelovirus are two genera of the Picornaviridae family, comprising highly variable and heterogeneous enteric viruses, commonly found in faecal samples from domestic pigs. Although both of them are also known to infect wild boar, studies on their presence in these wild suids are scarce. The present study aimed at determining the presence of porcine teschovirus (PTV) and sapelovirus (PSV) in free-living wild boar populations, as well as to study their relationships with similar viruses present in pigs. Fresh faecal samples (n = 63) from wild boar were collected in Doñana Biological Reserve (SW Spain) during 2007 and 2011, and analysed using multiplex RT-PCR for the simultaneo…
Old controversies and new data: assessing again the polychrome vases from Centuripe
2022
The necropolises of the hill town of Centuripe (EN) in Sicily have been looted since the nineteenth century for obtaining objects that were attractive for antiquities collectors, such as Hellenistic terracotta figurines and the brightly polychrome vases produced by local artisans (known as “Centuripe vases”) that today are scattered throughout a number of museums and private collections over the world. Until recent times, quite many vases have been considered doubtful and sometimes revealed as forgeries. Some “restorers” working in the dark circuit were able either to reproduce the shapes and decorations of ancient vases or to “refresh” their painted surfaces indeed: the interplay between g…
Ottimizzazione della produzione di energia elettrica da impianti fotovoltaici
2014
Le citazioni dei tragici nell'Onomasticon di Polluce. Libri I, II, III, VI
La tesi analizza tutte le citazioni di Eschilo, Sofocle ed Euripide tramandate dall'Onomasticon di Giulio Polluce, relativamente ai libri I, II, III e VI. Completano l'opera un'introduzione generale sulla lessicografia greca e sulla struttura dell'Onomasticon, e delle Conclusioni in cui si analizzano lo stile di Polluce e le sue teorie linguistiche.
Supported Poly(Ionic Liquid)-Heteropolyacid Based Materials for Heterogeneous Catalytic Fructose Dehydration in Aqueous Medium
2022
Two sets of four different supported catalyst materials were prepared. One set was obtained by polymerization of a bis-vinylimidazolium salt, which formed a poly(ionic liquid) coating on SiO2, TiO2, boron nitride BN, and carbon nitride C3N4. The other set was, instead, obtained by immobilizing Keggin heteropolyacid H3PW12O40 onto poly-imidazolium functionalized materials. All the catalysts, including the bare supports, were subjected to physical and chemical characterization by XRD, SEM, Specific Surface Area and pore size measurements, TGA, FTIR, and acidity-basicity measurements. The catalytic activity of the materials was tested versus the fructose dehydration in water solution at two di…
Validation and application of a PCR primer set to quantify fungal communities in the soil environment by real-time quantitative PCR
2011
Fungi constitute an important group in soil biological diversity and functioning. However, characterization and knowledge of fungal communities is hampered because few primer sets are available to quantify fungal abundance by real-time quantitative PCR (real-time Q-PCR). The aim in this study was to quantify fungal abundance in soils by incorporating, into a real-time Q-PCR using the SYBRGreen (R) method, a primer set already used to study the genetic structure of soil fungal communities. To satisfy the real-time Q-PCR requirements to enhance the accuracy and reproducibility of the detection technique, this study focused on the 18S rRNA gene conserved regions. These regions are little affec…