Search results for "paint"
showing 10 items of 605 documents
Gianfrancesco Maineri, Paolo da San Leocadio i la gènesi d?un model de Crist portacreu
2020
[CA] El present article es centra en la vinculació entre els diversos exemplars de Crist portacreu de Gianfrancesco Maineri i els homònims de Paolo da San Leocadio. A través de diverses comparacions, tractarà d¿explicar-se la gènesi d¿aquest model, aportant, a més, dades que permetran una millor classificació dels exemplars leocadians. Finalment, es realitzen una sèrie de reflexions entorn de l¿hipotètic retorn de San Leocadio a Itàlia (1485-1489) i a la seua possible vinculació amb Maineri.
Resistance to demineralisation of adjacent enamel and dentine, fluoride release and dentine bond strength of fluoride-containing self-etch adhesive s…
2019
Background The current study aimed to assess the amount of fluoride released from fluoride-containing dental adhesives and its effect on micro-tensile bond strength (µTBS) and on resistance to demineralisation of dentine and enamel. Material and Methods Two fluoride-containing dental adhesives, and a fluoride-free adhesive were used as experimental adhesives. After thermal cycling the µ-TBS of adhesives to dentine and the failure mode were assessed. The fluoride release and cross-sectional microhardness (CSMH) of specimens were measured before and after one day, 7 and 28 days of pH-cycling. The data were analysed using one-way ANOVA, Weibull statistics and repeated measures ANOVA. Results T…
Riflessioni sull’iconografia funeraria lilibetana nell’età di Cicerone
2021
Twenty-four, and possibly twenty-five painted stelae and aediculae were found, in different times, in the area of the necropolis of Lilybaeum (1903, 1974-1984), and further North, nearer to the ancient sea-shore (1895); most recently, two new entries enhanced the Museo Lilibeo (2009), beside two elements from decorated epitymbia. Despite previous scholarly opinions spread these artifacts over three centuries, as a whole, they can be assigned approximately to Cicero’s time. Some cross-cutting features, as a matter of fact, connect the stelae and the “Salinas” aediculae, and indicate that both date between the late 2nd and the late 1st century BC. Nevertheless, they constitue two neatly diffe…
XRMA analysis and X-ray diffraction analysis of dental enamel from human permanent teeth exposed to hydrogen peroxide of varying pH
2019
Background This in vitroinvestigation shows how 3.3% H2O2, at different pH-values affects the enamel. Material and Methods A number of fifteen human premolars were used. The enamel of the coronal half in six of the teeth, were exposed by H2O2. Nine teeth were prepared to enamel powder. The enamel was exposed to 3.3% H2O2, at six different pH-values (pH range 4.5 - 7.0). Analyses of the topography of enamel performed by scanning electron microscope (SEM) and the chemical composition of enamel by X-ray microanalysis (XRMA). X-ray powder diffraction (XRD) analysed the crystallinity in enamel powder. Results The exposure to H2O2 at pH5.5 resulted in a decrease of O in the exposed enamel, and ch…
The effect of oxalate-based desensitizers on the microleakage and shear bond strength of resin modified glass ionomer
2017
Background The first line of intervention to alleviate tooth sensitivity is to use dentin desensitizers such as oxalate-based desensitizers. When the dentin sensitivity continues even after application of desensitizers the next intervention would be restoration of the lesion. The aim of this in vitro study was to investigate the effect of prior application of oxalate-based desensitizer on the marginal microleakage and shear bond strength of resin modified glass ionomer (RMGI) restorations. Material and methods In order to prepare the specimens for microleakage test standard class v cavities were prepared on buccal surfaces of 45 teeth. The specimens were randomly divided into three equal gr…
Identification of plant cells in black pigments of prehistoric Spanish Levantine rock art by means of a multi-analytical approach. A new method for s…
2017
We present a new multi-analytical approach to the characterization of black pigments in Spanish Levantine rock art. This new protocol seeks to identify the raw materials that were used, as well as reconstruct the different technical gestures and decision-making processes involved in the obtaining of these black pigments. For the first of these goals, the pictorial mat- ter of the black figurative motifs documented at the Les Dogues rock art shelter (Ares del Maestre, Castello ́ n, Spain) was characterized through the combination of physicochemical and archeobotanical analyses. During the first stage of our research protocol, in situ and non- destructive analyses were carried out by means of…
Genetic aspects in hominid evolution
2000
Genomic comparison between apes and humans have made important contributions to our understanding of human evolution. The modern period of karyological comparisons between humans and other primates began about forty years ago and has been marked by a series of technical revolutions. In the 1960s pioneering genetic and chromosomal comparisons of human and great apes suggested, as had Darwin a century before, that our closest relative were the African apes. Early immunological analyses placed human/apes divergence at about five million year ago. Acceptance of man’s late divergence from the African apes was delayed by the scarcity of paleontological evidence coupled with a fallacious Asiatic o…
Sacro, erotismo e ironia. Il corpo della donna ne "I Miracoli di Val Morel" di Dino Buzzati
2018
Ne "I miracoli di Val Morel" (1971) – una raccolta di immaginarie pitture votive originarie della valle bellunese e dedicate a Santa Rita – Dino Buzzati contrappone due tipi femminili: la peccatrice e la santa; la donna lussuriosa e la donna casta; la donna della tentazione e la donna della salvezza; la donna che espone il proprio corpo allo sguardo maschile e la donna pudica in abiti agostiniani. Le due figure femminili non costituiscono però una semplice contrapposizione tra due tipi ideali di donna, estetici o moraleggianti, ma la loro compresenza, nel testo verbale e visivo, si lega strettamente alle strategie di veridizione o, detto altrimenti, alla ricerca della verità, tema centrale …
Proceeding Book of 12th European Symposium on Religious art, Restoration & Conservation
2022
Fundamental contribution to filling out the condition reports of the work of arts involved in temporary exhibitions is provided by non-invasive investigation techniques. Investigation, carried out before and after the movement, allow to collect objective data to monitoring the surface or structural alterations and defining the state of conservation, representing an important moment of deepening of knowledge. Generally, these aspects often are left to photographic documentation and observations by conservators and curators. An example of good practice is represented by the case of the Saint Gregory Polyptych (Antonello da Messina, 1473) belonging to the Regional Museum of Messina (Italy). Th…
"Ut pictura poiesis": text i imatge, mimesi i realitat quant a «Tirant lo Blanch»
2007
The relationship between literature and reality in the Middle Ages can be considered from several dimensions. One of the most important cultural elements of the medieval period is the visual representation of reality found it literary texts, not only through the presence of miniatures in the manuscripts, but especially through the description of realia in the same text. The encyclopedic tradition helps to intertwine this close relationship between the outer representativeness and the inwardness of the text, a new interpretation of the Horacian’s ut pictura poiesis. The «Tirant lo Blanch» is a fictional text full of iconic references to contemporary reality, which in this study are made clea…