Search results for "Glass"
showing 10 items of 1153 documents
Evaluación “in vitro” del comportamiento en dentina afectada por caries de un adhesivo bioactivo/biomimético experimental frente a diversos sistemas …
2020
Debido a la gran cantidad de procedimientos adhesivos que realizamos en la clínica diaria sobre dentina afectada por caries (DAC),necesitamos perfeccionar las estrategias adhesivas, no sólo de cara a mantener la capa híbrida en buen estado sino para intentar modificarla o al menos "defenderla" de una más que probable futura filtración lateral, favoreciendo la remineralización biomimética (de dentro-afuera) o precipitación mineral a través de materiales bioactivos que reaccionen en presencia de agua. OBJETIVOS. 1. Evaluar la estabilidad adhesiva en el tiempo de un adhesivo experimental (EXP) frente a otros sistemas comerciales. El material EXP contenía bioglass dopado con fluoruro junto a pr…
Effect of protein net charge and steric hindrance on the glass transition of Protein-Trehalose-Water systems and on protein thermal denaturation
2010
Matrix glass transition and embedded protein denaturation: effect of trehalose on different proteins
2010
Transition from glass to digital slide microscopy in the teaching of oral pathology in a Brazilian dental school
2014
Objectives: Several medical and dental schools have described their experience in the transition from conventional to digital microscopy in the teaching of general pathology and histology disciplines; however, this transitional process has scarcely been reported in the teaching of oral pathology. Therefore, the objective of the current study is to report the transition from conventional glass slide to virtual microscopy in oral pathology teaching, a unique experience in Latin America. Study Design: An Aperio ScanScope® scanner was used to digitalize histological slides used in practical lectures of oral pathology. The challenges and benefits observed by the group of Professors from the Pira…
De Bibracte à Augustodunum : permanences et évolutions des activités manufacturières de l’époque gauloise à la fin du Haut-Empire
2007
L’importance de l’artisanat autunois et son développement jusqu’au iiie siècle prennent racine à Bibracte qui a su exploiter les ressources naturelles de son environnement et parfaire un savoir-faire local ayant survécu à la conquête. Les recherches sur ces activités manufacturières menées conjointement à Bibracte et à Autun nous offrent ainsi une opportunité d’étudier ces problématiques sur la durée. À Bibracte, puis à Autun, les artisans du métal sont omniprésents, mais d’autres métiers, aux témoins plus discrets, ont pu aussi êtres identifiés. Dans le cadre de cet article, nous présentons succinctement les lieux de production et un bilan des différents corps de métier. Enfin, nous évoquo…
Escultura y vidrio: España (1975-1995). New Glass Movement
2015
Esta tesis aborda el estudio de las primeras manifestaciones del New Glass Movement en España a través de autores españoles y de las obras de escultores extranjeros que expusieron en nuestro país entre 1975 y 1995. El último capítulo recoge un catálogo con 298 obras seleccionadas, que vertebra toda la investigación, contemplando más de 150 autores, 46 de ellos españoles y, entre estos, 20 artistas plásticos que integran el vidrio en su obras. Sobre todos ellos versa el discurso de este trabajo, que se cierra con una amplia relación de fuentes bibliográficas y documentales y cuatro anexos. Hablamos de New Glass Movement, Studio Glass o Vidrio contemporáneo para referirnos a una tendencia art…
Characterisation of Fibre Glass Panels for Naval Use
2004
This work examines the characteristic of fiber glass composite panels constructed by Cantieri Arturo Stabile in Trapani (Italy): composite materials are very used in the naval applications, where high stiffness and resistance are required with reduced weight. Experimental tests are executed following ASTM or UNI EN rules, in particular the shear test is executed using a rig constructed to the purpose, designed following the rule ASTM D 4255-83. Besides the tests were simulated by analytical methods, by means of Cadec software and numerically by FEM software as Altair Hyperworks and Ansys, to evidence the error range of the experimental test and to obtain the configuration that can give suit…
Enhancement of structural, functional and antioxidant properties of fish gelatin films using Maillard reactions
2018
International audience; This study investigates the effect of Maillard reactions (MR) on the physico-chemical and biological properties of fish gelatin based edible films. Glucose was incorporated in gelatin film forming solutions at different glucose/lysine molar ratios: 0.5/1.0, 1.0/1.0 and 5.0/1.0. The MR was then induced by heating films at 90 °C for 24 h in dry conditions. Color changes and browning index measurements were used to pursue the MR kinetic. Results showed that the development of MR products was dependent on the glucose content and on the reaction time. Mechanical and thermal properties of treated films displayed an increase in tensile strength, elongation at break and glas…
Biological and antibacterial properties of a new silver fiber post : in vitro evaluation
2016
Background The incorporation of nano silver particles (AgNPs) to improve antibacterial properties of dental materials has become increasingly common. The aim of the present study was to compare the antibacterial activity and cytotoxicity effects of different fiber posts: glass fiber post, quartz fiber post, nano fiber post and silver fiber post. Material and methods The antibacterial activity against S. mutans, S. salivarius and S. sanguis was evaluated by using the agar disc diffusion test (ADT). Four wells of 3x2 mm (one for each material) were made with a punch by removing the agar and filled with the materials to be evaluated. The size of the inhibition zone was calculated. An extract w…
Sorption kinetic of aroma compounds by edible bio-based films from marine-by product macromolecules: Effect of relative humidity conditions
2019
International audience; Edible films based on gelatin and chitosan have high gas and aroma barrier properties. This study focused on their capability to sorbed/retain aroma compounds (1-hexanal, 2-hexen-1-ol, 1-hexanol, 3-hexanone and phenol) at three relative humidity level (≤2%, 53% or 84% RH). Whatever the relative humidity condition, the order of sorption is keton (3-hexanone) < aldehyde (1-hexanal) < aliphatic alcohols (2-hexen-1-ol and 1-hexanol) < phenol. This order could be related to the intrinsic chemical properties of aroma compounds. The increase in moisture enhanced the sorption at the highest RH for all the aroma compounds. However, a competition between water and aliphatic al…