Search results for "MMA"
showing 10 items of 13609 documents
Fruition and valorisation of disused manufacturing settlements: the "tonnare" of the Gulf of Castellammare case-studies. The Gulf of Castellammare: s…
2013
The issue about enhancement, fruition and management of manufacturing settlements, obsolete in relation with technological developments is not new and stands still at the centre of a heated debate, full of causes for reflection. Buildings assigned to fishing, processing and conservation of tuna (called tonnare) are emblematic. Process of decay involved Castellammare territory, in Sicily, wich is characterized by the presence of many artefacts.
A handy and accessible tool for identification of Sn(II) in toothpaste.
2021
AbstractAn easily accessible colorimetric probe, a carbazole–naphthaldehyde conjugate (CNP), was successfully prepared for the selective and sensitive recognition of Sn(II) in different commercially-available toothpaste and mouth wash samples. The binding mechanism of CNP for Sn2+ was confirmed by UV–Vis, 1H, and 13C NMR titrations. The proposed sensing mechanism was supported by quantum chemical calculations. Selective detection of Sn(II) in the nanomolar range (85 nM), among other interfering metal ions, makes it exclusive. Moreover, Sn2+ can be detected with a simple paper strip from toothpaste, which makes this method handy and easily accessible. The potential application of this system…
A NOVEL APPROACH TO FULLY CHARACTERIZE FIBER NETWORK MORPHOLOGY OF PLANAR FIBROUS TISSUES AND SCAFFOLDS
2011
Comprendere come la struttura di uno scaffold influenzi la morfologia cellulare e predirne il comportamento meccanico sono divenuti obiettivi fondamentali nello sviluppo dei tessuti ingegnerizzati. In questo studio si presenta un algoritmo innovativo basato su analisi d’immagine. Vengono introdotti descrittori di micro architettura che identificano univocamente la topologia della rete di fibre: orientamento delle fibre, connettività, densità spaziale delle intersezioni e diametro. Le prestazioni dell’algoritmo sono state valutate utilizzando immagini di microscopio a scansione elettronica (SEM) di (1) scaffolds in poliestere uretano-urea prodotti per elettrospinning, (2) gel di collagene se…
Experimental study of 100Tc β decay with total absorption γ -ray spectroscopy
2017
The β decay of 100Tc has been studied by using the total absorption γ -ray spectroscopy technique at the Ion Guide Isotope Separator On-Line facility in Jyväskylä. In this work the new Decay Total Absorption γ -ray Spectrometer in coincidence with a cylindrical plastic β detector has been employed. The β intensity to the ground state obtained from the analysis is in good agreement with previous high-resolution measurements. However, differences in the feeding to the first-excited state as well as weak feeding to a new level at high excitation energy have been deduced from this experiment. Theoretical calculations performed in the quasiparticle random-phase approximation framework are also r…
r Process (n, γ) Rate Constraints from the γ Emission of Neutron Unbound States in β decay
2017
Total absorption gamma-ray spectroscopy is used to measure accurately the intensity of γγ emission from neutron-unbound states populated in the ββ-decay of delayed-neutron emitters. From the comparison of this intensity with the intensity of neutron emission a constraint on the (n, γγ) cross section for highly unstable neutron-rich nuclei can be deduced. A surprisingly large γγ branching was observed for a number of isotopes which might indicate the need to increase by a large factor the Hauser-Feshbach (n, γγ) cross-section estimates that impact on r process abundance calculations. peerReviewed
Total absorption spectroscopy study of the β decay of 86Br and 91Rb
2017
The beta decays of 86Br and 91Rb have been studied using the total absorption spectroscopy technique. The radioactive nuclei were produced at the Ion Guide Isotope Separator On-Line facility in Jyväskylä and further purified using the JYFLTRAP. 86Br and 91Rb are considered to be major contributors to the decay heat in reactors. In addition, 91Rb was used as a normalization point in direct measurements of mean gamma energies released in the beta decay of fission products by Rudstam et al. assuming that this decay was well known from high-resolution measurements. Our results show that both decays were suffering from the Pandemonium effect and that the results of Rudstam et al. should be renor…
Total absorption γ-ray spectroscopy of the β-delayed neutron emitters 87Br, 88Br, and 94Rb
2017
We investigate the decay of 87,88Br and 94Rb using total absorption γ -ray spectroscopy. These important fission products are β-delayed neutron emitters. Our data show considerable βγ intensity, so far unobserved in high-resolution γ -ray spectroscopy, from states at high excitation energy. We also find significant differences with the β intensity that can be deduced from existing measurements of the β spectrum. We evaluate the impact of the present data on reactor decay heat using summation calculations. Although the effect is relatively small it helps to reduce the discrepancy between calculations and integral measurements of the photon component for 235U fission at cooling times in the r…
Siracusa e la Sicilia nel III secolo a.C.: problemi conoscitivi e proposte di lettura dei fenomeni urbanistici e architettonici
2017
L’evoluzione sotto il profilo urbanistico e architettonico delle città di Sicilia nel III secolo a.C. può essere compresa solo a partire da un esame delle evidenze di Siracusa, la maggiore città dell’Occidente greco-ellenistico e capitale di un regno che sotto Agatocle e soprattutto sotto Ierone II vede un prodigioso sviluppo non solo per l’estensione dell’area urbana, ma soprattutto per la riconfigurazione dello spazio cittadino in forme innovative, destinate a influenzare in maniera decisiva anche le città minori del regno e dell’Oriente dell’isola, e successivamente anche dei comprensori centro-occidentali e settentrionali. L’aspetto più importante e programmatico nella rimodulazione del…
Tradurre un mito letterario: tradurre Orazio
2020
Quinto Orazio Flacco è fra i più tradotti auctores latini nelle culture letterarie d’Europa, soprattutto nei secoli XVI, XVII, XVIII. La ricostruzione repertoriale e critica delle traduzioni che hanno avuto per oggetto il suo corpus si offre, quindi, come documento particolarmente significativo della fortuna traduttoria di un mito letterario, in quanto attesta il rapporto di imitatio/aemulatio che numerosi autori hanno stabilito con il modello nel momento in cui hanno deciso di assimilarlo, attraverso le traduzioni, alle lingue e alle culture nazionali cui essi appartengono.
Una Tragedia giocosa
2008
Il dramma satiresco dell''età classica può essere rivisitato teatralmente in parallelo alla evoluzione delle strutture giocose del teatro orientale e occidentale. Il Ciclope di Euripide attraverso la mediazione di Ettore Romagnoli e di Luigi Pirandello, che lo riambienta traducendo in siciliano nella struttura della campagna di Liolà e di altri suoi drammi contadini, si presenta come una via di reinterpretazione dell''antica forma di spettacolo.