Search results for "Paint"
showing 10 items of 605 documents
Effect of over-the-counter whitening strips and toothpaste on shear bond strength of orthodontic brackets
2021
Background To investigate: 1) the effects of over-the-counter white strip enamel bleaching and 2-Step whitening toothpaste application on the shear bond strength of orthodontic brackets at 24-hours and 7-days post-bleaching latent period; and 2) the correlation between amount of bleaching and shear bond strength. Material and Methods Sixty human premolar teeth were randomly assigned into two bleaching groups, white strip group treated with Crest® 3D WHITE™ LUXE Professional Effects Whitestrips (Proctor & Gamble, Greensboro, NC), and whitening toothpaste group, treated with Crest® 3D WHITE™ BRILLIANCE 2-Step Toothpaste (Proctor & Gamble, Greensboro, NC). The groups were further divided into …
The effect of orthodontic bracket pad shape on shear bond strength, an in vitro study on human enamel
2018
Background To evaluate the effect of bracket pad shape on shear bond strength (SBS) of orthodontic brackets bonded to human enamel. Material and Methods One hundred and five extracted human maxillary permanent molars were divided into 7 groups of 15 specimens per group (n=15). Each group of teeth was bonded with 6 different shaped WildSmiles® brackets (Star, Heart, Soccer ball, Football, Flower, and Diamond) and GAC® rectangle shaped brackets. Shear debonding force was measured with an Instron universal testing machine using a knife-edged chisel 24 hours after initial bonding. Descriptive statistics (mean, standard deviation, and range) for each bracket pad shape was calculated. Analysis of…
Microanalytical method for studying paintings by use of fluorescence spectroscopy combined with principal component analysis
2013
Abstract The study of several different naturally aged films of organic painting materials, is described. Materials studied include drying oils (walnut, poppy seed and linseed oil) resin-based paint varnishes (the triterpenoid dammar and the diterpenoids sandarac and turpentine) and protein-based binding media (egg yolk and casein). A not expensive methodology for a rapid identification of binding media and varnishes, that applies principal component analysis (PCA) to Excitation Emission (EE) fluorescence spectra, is proposed. PCA was performed on a data matrix where the rows represent studied materials and columns the variables; the variables include the fluorescence intensities associated…
Phylogenomics of species from four genera of New World monkeys by flow sorting and reciprocal chromosome painting
2007
Abstract Background The taxonomic and phylogenetic relationships of New World monkeys (Platyrrhini) are difficult to distinguish on the basis of morphology and because diagnostic fossils are rare. Recently, molecular data have led to a radical revision of the traditional taxonomy and phylogeny of these primates. Here we examine new hypotheses of platyrrhine evolutionary relationships by reciprocal chromosome painting after chromosome flow sorting of species belonging to four genera of platyrrhines included in the Cebidae family: Callithrix argentata (silvered-marmoset), Cebuella pygmaea (pygmy marmoset), Callimico goeldii (Goeldi's marmoset) and Saimiri sciureus (squirrel monkey). This is t…
Klasicisms un romantisms franču glezniecībā pēc Rīgas un Jelgavas muzeju gleznām: studiju darbs
1933
La collezione storico artistica
2021
The essay illustrates the heterogeneous collection of the Civic Museum, named after the scholar and collector from Erice Antonio Cordici (1586 – 1666), begins a come to life around 1876. The Hernandez and Coppola donations, along with the artifacts acquired after the post-unification suppression of religious orders, constitute the main nucleus of the permanent exhibition, previously set up in the town hall and since 1939 in the rooms adjacent to the Library. The current arrangement of the collection of historical-artistic assets, which combines, through an adequate museographic set-up, the enhancement of the works with the conservation and safeguarding aspect, exhibits the artifacts accordi…
The Contribution of Microchemical Analyses and Diagnostic Imaging to the Conservation and Identification of the Degraded Surfaces of Hellenistic-Roma…
2020
The Archaeological Museum of Palermo (Sicily) has recently presented the results of the restoration of three wall paintings from the House of the Masks of Solunto archaeological site. These significant paintings, dating back to the first century BCE, are the most significant examples of Pompeian style discovered in Sicily to date. The cycle of frescoes unearthed is the best preserved and most complete example of wall painting dating to the Republican Roman period in Sicily. This house was a luxurious private residence built on two floors and centred around a peristyle. This fresco cycle embellished the walls of a banquet room (oecus) discovered during an archaeological excavation carried ou…
TRA FIANDRE E ITALIA: Rubens 1600-1608
2020
Regesto biografico-critico" by Raffaella Morselli, which took place at the Federico Zeri Foundation during the "Encounters in the Library 2019" event. The volume offers a biographical and critical overview of the artist Rubens, exploring his life and work through previously unpublished sources, including his correspondence, and his nephew's biography. The book provides a unique opportunity to systematize Rubens' correspondence, which has not been done before, thanks to the author's translation skills from Flemish, Latin, Greek, and Spanish. The text also sheds light on Rubens' multifaceted and atypical genius, his ability to speak multiple languages, and his double role as an artist and dip…
An authentication case study: Antonio Palomino versus Vicente Guillo paintings in the vaulted ceiling of the Sant Joan del Mercat church (Valencia, S…
2012
In 1695, the Valencian artist Vicente Guillo was engaged in painting the vault of the Sant Joan del Mercat church in Valencia, Spain. After preliminary work was carried out, his contract was cancelled. In 1697, Antonio Palomino, renowned for the publication of his technical treatise entitled El Museo Pictorio y Escala Optica, was finally selected as the painter in charge of decorating the vaulted ceiling of Sant Joan del Mercat. This paper reports an analytical study focused on the characterisation and discrimination of the palette and painting procedures used by Palomino and Guillo in the frescoes of Sant Joan del Mercat. For this purpose, Raman spectroscopy combined with light microscopy,…
“Com fa faena de fusta”. El retablo renacentista del gremio de carpinteros de Valencia
2021
El gremio de carpinteros de Valencia costeó un nuevo retablo a partir de 1542, que fue realizado por el escultor Damià Gonçalbes. Sus pinturas fueron contratadas con Onofre Falcó, y los temas representados constituyen un discurso autorreferencial que justifica visualmente el viraje en el patronazgo corporativo y dignifica el oficio al vincularlo a san José y otros santos.