Apatite
Mostrando 25-36 de 153 artigos, teses e dissertações.
-
25. Improving the Radiopacity of Calcium Aluminate Cement Based Blends
The radiopacity of CAC-based compositions containing additives (ZnO, Ag and Bi2O3) was evaluated by optical density measurements, cold crushing strength, apparent porosity, pore size distribution, in vitro apatite-formation ability (bioactivity) and cell viability. The bioactivity was assessed via pH and calcium concentration measurements in simulated body f
Mat. Res.. Publicado em: 22/01/2018
-
26. Influence of agitation intensity on flotation rate of apatite particles
Abstract The agitation intensity has a directly influence on flotation performance, lifting the particles and promoting the contact of bubbles and particles. In this paper, the energy input by the agitation on apatite flotation was investigated. The influence of pulp agitation in the flotation rate of particles with different sizes and two dosage levels was
REM, Int. Eng. J.. Publicado em: 2017-12
-
27. Enhanced bioactive properties of BiodentineTM modified with bioactive glass nanoparticles
Abstract Objective To prepare nanocomposite cements based on the incorporation of bioactive glass nanoparticles (nBGs) into BiodentineTM (BD, Septodent, Saint-Maur-des-Fosses Cedex, France) and to assess their bioactive properties. Material and Methods nBGs were synthesised by the sol-gel method. BD nanocomposites (nBG/BD) were prepared with 1 and 2% nBG
J. Appl. Oral Sci.. Publicado em: 2017-04
-
28. Cellular Adaptation: Culture conditions of R. opacus and bioflotation of apatite and quartz
Abstract It is well known that the culture conditions of microorganisms may affect their surface properties, zeta potential and hydrophobicity via the modification of the cell wall functional groups or metabolic products. The R. opacus bacteria strain was separately adapted to the presence of apatite and quartz, after which a cellular adaptation procedure wa
REM, Int. Eng. J.. Publicado em: 2017-03
-
29. Fibers Obtained from Alginate, Chitosan and Hybrid Used in the Development of Scaffolds
The main aim of this study was to develop scaffolds based on alginate, chitosan and hybrid fibers with and without glycerol. The scaffolds developed underwent assessments for tensile property, swelling ratio and weight loss, cellular viability, degradation and biomineralization, as well as DSC/TGA thermal analysis. Tenacity values showed that use of glycerol
Mat. Res.. Publicado em: 23/01/2017
-
30. Manufacture of nanosized apatite coatings on titanium with different surface treatments using a supersaturated calcification solution
The biomimetic method is used for the deposition of calcium phosphate coatings (Ca - P) on the surface of different biomaterials. However, the application of this method requires long exposure times in order to obtain a suitable layer thickness for its use in medical devices. In this paper, we present a fast approach to obtain apatite coatings on titanium, u
Quím. Nova. Publicado em: 2016-12
-
31. Paralavas in the Cretaceous Paraná volcanic province, Brazil - A genetic interpretation of the volcanic rocks containing phenocrysts and glass
ABSTRACT The occurrences of glassy rocks containing long and curved phenocrysts in the Paraná volcanic province, South America, are here interpreted as paralavas. The large number of thin (0.1-0.5 m) dikes and sills of glassy volcanic rocks with hopper, hollow or curved, large crystals of clinopyroxene (up to 10 cm), plagioclase (up to 1 cm), magnetite and
An. Acad. Bras. Ciênc.. Publicado em: 2016-12
-
32. Bioflotation of apatite and quartz: Particle size effect on the rate constant
This work deals with the fundamental aspects of apatite and quartz bioflotation using R. opacus bacteria as a bioreagent. It was observed that the flotability of both minerals depends on the pH value and the mineral particle size. The maximum flotability of both minerals was presented at a pH value of 5, achieving values of 90% and 14% for apatite and quartz
Rem: Rev. Esc. Minas. Publicado em: 2015-09
-
33. Bioactive and Hemocompatible Calcium Sulphoaluminate Cement
Calcium sulphoaluminate cement (CSAC) is an attractive candidate for biomedical applications due to its appropriate mechanical properties and high calcium content. In vitro bioactivity and hemocompatibility of calcium sulphoaluminate cement were assessed. The cement was prepared from a mixture of calcium sulphoaluminate (CSA) clinker, gypsum and water. Cemen
Mat. Res.. Publicado em: 2015-04
-
34. Re-Ingeniería de apatita natural para soporte de tejidos óseos
Recent progresses in orthopedic medicine, traumatology and odontology have created a great requirement for biomaterials, especially those products having a composition based on calcium orthophosphate, which is similar to inorganic bone structure. Given this situation, there has been an intense search for new origins and resources of biomaterials. The natural
Matéria (Rio J.). Publicado em: 2014-09
-
35. Bioactivity of leucite containing glass - ceramics using natural raw materials
Glass compositions were carefully prepared, using natural quartz and potassium feldspar as a part of the starting raw materials. The solids were prepared so as to have theoretical stoichiometric leucite and 45S5 Bioglass in different L/Bg weight ratios between 0.43 - 1.00. Novel bioactive glass - ceramics, containing leucite, sodium calcium silicate and sili
Mat. Res.. Publicado em: 22/07/2014
-
36. Enamel crystals of mice susceptible or resistant to dental fluorosis: an AFM study
Objective: This study aimed to assess the overall apatite crystals profile in the enamel matrix of mice susceptible (A/J strain) or resistant (129P3/J strain) to dental fluorosis through analyses by atomic force microscopy (AFM). Material and Methods: Samples from the enamel matrix in the early stages of secretion and maturation were obtained from the inc
J. Appl. Oral Sci.. Publicado em: 2014-06