scholarly journals Influence of sodium hypochlorite and ultrasounds on surface features and chemical composition of Biodentine tricalcium silicate-based material

2020 ◽  
Vol 39 (4) ◽  
pp. 587-592
Author(s):  
Aleksandra PALATYŃSKA-ULATOWSKA ◽  
Katarzyna BUŁA ◽  
Leszek KLIMEK
Keyword(s):  
Chemical Composition ◽  
Sodium Hypochlorite ◽  
Tricalcium Silicate ◽  
Surface Features

Microstructural Development During Suspension Hydration of Tricalcium Silicate Under “Floating” and Fixed pH Conditions

1986 ◽  
Vol 85 ◽  
Author(s):  
A. R. Ramachandran ◽  
Michael W. Grutzeck
Keyword(s):  
Chemical Composition ◽  
Tricalcium Silicate ◽  
Solution Phase ◽  
Microstructural Development ◽  
Ph Conditions ◽  
Hydrate Products

ABSTRACTThe suspension hydration of tricalcium silicate (water-solid 500) has been studied under both floating and fixed pH (8 to 12) conditions. In addition to solution analysis, the microstructure and chemical composition of the hydrate products was also studied. The results are interpreted as suggesting the existence of two C-S-H phases in the system CaO-SiO2-H2O, the stabilization of each being dependent on the pH of the solution phase.

scholarly journals Change of the Chemical and Mineralogical Composition of the Slag during Oxygen Blowing in the Oxygen Converter Process

Metals ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 844 ◽  
Author(s):  
Dana Baricová ◽  
Alena Pribulová ◽  
Peter Futáš ◽  
Branislav Buľko ◽  
Peter Demeter
Keyword(s):  
Chemical Composition ◽  
Oxygen Converter ◽  
Steel Production ◽  
Mineralogical Composition ◽  
Tricalcium Silicate ◽  
Dicalcium Silicate ◽  
Structural Components ◽  
Assimilation Process ◽  
Chemical And Mineralogical Composition ◽  
Calcium Ferrites

The article presents the results of the investigation of changes in the chemical and mineralogical composition of slag during steel production in a blown oxygen converter. This process was monitored using the slag samples that were collected during the period when oxygen blowing into an oxygen converter was interrupted. The slag samples were collected after 150 s (2.5 min), then after 5, 8, 11, and 24 min of oxygen blowing, and in minute 27 when oxygen blowing was terminated. The sampling was carried out within five consecutive melting processes. The article presents and documents the changes in the contents of CaO, CaO (free), Fe (total), FeO, SiO2, and in the basicity of the slag during oxygen blowing. It also provides the characteristics of individual structural components formed during oxygen blowing and a detailed description of the lime assimilation process, including the formation of the final structure of the slag, consisting of dicalcium silicate (2CaO·SiO2), tricalcium silicate (3CaO·SiO2), RO-phase, and calcium ferrites (2CaO·Fe2O3). The results of the investigation of the changes in the chemical composition of the slag during oxygen blowing in an oxygen converter were compared with the changes in the structural composition of the slag.

The influence of sodium hypochlorite and EDTA on the chemical composition of dentine

2007 ◽  
Vol 40 (5) ◽  
pp. 404-404
Author(s):  
C. Ramirez-Bommer ◽  
K. Gulabivala ◽  
J. A. P. Figueiredo ◽  
A. Young
Keyword(s):  
Chemical Composition ◽  
Sodium Hypochlorite

Surface Characterization of Magnesium Anodized in a 10M KOH Electrolyte

2014 ◽  
Vol 922 ◽  
pp. 513-518 ◽  
Author(s):  
Christopher Miller ◽  
Aaron F. Cipriano ◽  
Hui Nan Liu
Keyword(s):  
Chemical Composition ◽  
Surface Morphology ◽  
Surface Characterization ◽  
Synthesis Process ◽  
Alkaline Electrolyte ◽  
Thermal Treatments ◽  
Oxide Layers ◽  
Surface Features ◽  
Orthopedic Applications

Magnesium (Mg) is a promising implant material for orthopedic applications due to its biodegradability and desirable mechanical properties. However, in order for Mg to have widespread clinical applications, engineering solutions that address the rapid degradation in physiological environments and promote bone-forming activity are needed. The objective of this study was to develop an anodization process using a toxicant-free electrolyte to modulate nanoscale surface features and surface chemistry on Mg. Anodic polarization and potentiostatic anodization tests were used to evaluate the effect of applied potential on surface morphology of Mg in a 10 M KOH electrolyte. Nucleation of oxides as a function of anodization duration was also investigated in order to optimize the synthesis process. The alkaline electrolyte used for anodization of Mg offers an alternative to commercial processes that use hazardous elements. The anodized samples were annealed to investigate the effect of thermal treatments on surface morphology and chemical composition. The nanostructure and chemical composition of the anodized and annealed Mg substrates were characterized using scanning electron microscopy and energy dispersive X-ray spectroscopy. Our results showed that the nanostructures and chemical composition of anodically-generated oxide layers on Mg are specific to each oxidation process in a 10 M KOH electrolyte. Furthermore, results indicated that anodization durations of two hours generated surface oxide layers with homogeneous topography on the Mg substrates atapplied potentials of 0.5 V, 1.5 V and 2 V.. This study showed a promising approach for creating nanoscale surface features on Mg for improved bioactivity and degradation property.

scholarly journals Analysis of the effects of several decalcifying agents alone and in combination with sodium hypochlorite on the chemical composition of dentine

2017 ◽  
Vol 51 ◽  
pp. e42-e54 ◽  
Author(s):  
T. Tartari ◽  
L. Bachmann ◽  
R. F. Zancan ◽  
R. R. Vivan ◽  
M. A. H. Duarte ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Sodium Hypochlorite

The Geosciences Applied to Lunar Exploration

1962 ◽  
Vol 14 ◽  
pp. 169-257 ◽  
Author(s):  
J. Green
Keyword(s):  
Lunar Surface ◽  
Probable Mechanism ◽  
Point Of View ◽  
Lunar Exploration ◽  
Geological Model ◽  
Apply Geophysics ◽  
Surface Features ◽  
The Impact

The term geo-sciences has been used here to include the disciplines geology, geophysics and geochemistry. However, in order to apply geophysics and geochemistry effectively one must begin with a geological model. Therefore, the science of geology should be used as the basis for lunar exploration. From an astronomical point of view, a lunar terrain heavily impacted with meteors appears the more reasonable; although from a geological standpoint, volcanism seems the more probable mechanism. A surface liberally marked with volcanic features has been advocated by such geologists as Bülow, Dana, Suess, von Wolff, Shaler, Spurr, and Kuno. In this paper, both the impact and volcanic hypotheses are considered in the application of the geo-sciences to manned lunar exploration. However, more emphasis is placed on the volcanic, or more correctly the defluidization, hypothesis to account for lunar surface features.

The Origin of the Moon

1962 ◽  
Vol 14 ◽  
pp. 149-155 ◽  
Author(s):  
E. L. Ruskol
Keyword(s):  
Chemical Composition ◽  
Solar System ◽  
The Moon ◽  
The Earth ◽  
The Difference ◽  
Origin Of The Moon

The difference between average densities of the Moon and Earth was interpreted in the preceding report by Professor H. Urey as indicating a difference in their chemical composition. Therefore, Urey assumes the Moon's formation to have taken place far away from the Earth, under conditions differing substantially from the conditions of Earth's formation. In such a case, the Earth should have captured the Moon. As is admitted by Professor Urey himself, such a capture is a very improbable event. In addition, an assumption that the “lunar” dimensions were representative of protoplanetary bodies in the entire solar system encounters great difficulties.

On the Inhomogeneity of Chemical Composition over the Surface of 21 Per

1976 ◽  
Vol 32 ◽  
pp. 343-349
Author(s):  
Yu.V. Glagolevsky ◽  
K.I. Kozlova ◽  
V.S. Lebedev ◽  
N.S. Polosukhina
Keyword(s):  
Chemical Composition ◽  
Spectral Line ◽  
Variable Star ◽  
Radial Velocities ◽  
Crimean Astrophysical Observatory ◽  
Line Intensities ◽  
Magnetic Variable

SummaryThe magnetic variable star 21 Per has been studied from 4 and 8 Å/mm spectra obtained with the 2.6 - meter reflector of the Crimean Astrophysical Observatory. Spectral line intensities (Wλ) and radial velocities (Vr) have been measured.

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