Results 251 to 260 of about 1,348,474 (292)
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Reactions in Glass Ionomer Cements: III. The Precipitation Reaction
Journal of Dental Research, 1974Water-soluble ions in dental cements of different ages were studied. The cement is formed by the reaction between aqueous polyacrylic acid and an aluminosilicate glass. Electrical conductance measurements were made on cements up to three months after formation. Calcium polyacrylate is formed before aluminum polyacrylate.
S, Crisp, A D, Wilson
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Journal of Organizational Change Management, 2007
PurposeThis paper aims to investigate the phenomenon of the glass cliff, whereby women are more likely than men to be placed in precarious leadership positions. Men's and women's reactions to this subtle form of gender discrimination are examined, the identity processes involved, and the implications for organisations who must manage this change in the
Ryan, Michelle K. +2 more
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PurposeThis paper aims to investigate the phenomenon of the glass cliff, whereby women are more likely than men to be placed in precarious leadership positions. Men's and women's reactions to this subtle form of gender discrimination are examined, the identity processes involved, and the implications for organisations who must manage this change in the
Ryan, Michelle K. +2 more
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Porous bioactive glass and glass-ceramics made by reaction sintering under pressure
Journal of Biomedical Materials Research, 2000A glass and a rhenanite-wollastonite glass-ceramic were synthesized with the qualitative composition Na2O-CaO-SiO2-P2O5. Both materials were prepared by reaction sintering under isostatic pressure (RSIP) using powder mixtures. Solid state reactions were complete within a few hours at 950 degrees C under modest pressure.
W, Gong, A, Abdelouas, W, Lutze
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Reactions in Glass Ionomer Cements
Journal of Dental Research, 1974The initial stages of the reaction between the glass ionomer cement powder and polyacrylic acid solutions (aluminosilicate polyacrylate cement) are described. Polyacrylic acid rapidly decomposes the ion-leachable powder, possibly aided by some metal comPlex-forming function. The amount of fluoride extracted, which is related to its molecular condition
S, Crisp, A D, Wilson
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Reaction of HF with Porous Glass
Journal of the American Ceramic Society, 1969Infrared spectra were used to follow the reaction of HF with porous glass which had been dehydroxylated to various degrees. The fluoridation proceeded smoothly, and the surface hydroxyls were eliminated completely with samples which were not degassed or were degassed mildly (at temperatures up to approximately 500°C) so that appreciable amounts of ...
M. J. D. LOW +2 more
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REACTION BETWEEN METALS AND MOLTEN GLASS *
Journal of the American Ceramic Society, 1940A bstract A series of melts of soda‐lime‐silica glass cullet in contact with various chemical elements was made to determine by observation the extent of the reaction between metal and glass. The heat treatment consisted of a period of two hours at about 1250°C. An atmosphere
A. E. Badger, B. Bard
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FUNDAMENTAL REACTIONS IN GLASS MELTING. (1)
Journal of the Ceramic Association, Japan, 1936Thermal decompositions of the raw materials of glass, were studied with a thermobalance.With certain batches, the decrease of weight due to the liberation of gaseous components were determined after heating at 700°, 800° and 900°C for 2 hours. The amounts of alkali extracted by hot water were measured on the same samples.Batches, whose compositions ...
K. Tabata, T. Yokoyama, S. Minegishi
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Reaction between water and tektite glass
Journal of Non-Crystalline Solids, 1984Abstract The reaction between water and fracture surfaces of tektite glass is studied by measuring hydrogen cocentration profiles on samples exposed to distilled water at 90 °C for times up to 1160 h. Unlike other alkali-silicate glasses studied under similar conditions, no substantial hydrated surface layers are observed.
P.H. LaMarche, F. Rauch, W.A. Landford
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