Results 261 to 270 of about 909,392 (302)

Dissolution kinetics of paracetamol single crystals

International Journal of Pharmaceutics, 2002
The dissolution anisotropy of paracetamol crystals grown in the presence and absence of the molecularly similar additive, p-acetoxyacetanilide (PAA) was studied under controlled conditions using a single crystal dissolution method in undersaturated aqueous solutions.
Korlakunte V R, Prasad, Radoljub I, Ristic, David B, Sheen, John N, Sherwood   +3 more
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On the Kinetics of Precipitate Dissolution

Metal Science Journal, 1969
AbstractA theory of precipitate dissolution has recently been proposed by Aaron (Metal Sci. J., 1968, 2, 192) in which it is implied that a previous treatment by Thomas and Whelan (Phil. Mag., 1961, 6, 1103), where dissolution was considered to be approximately the reverse of growth, is in error in this assumption.
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On the Kinetics of Precipitate Dissolution

Metal Science Journal, 1968
AbstractA model is presented for the dissolution of a precipitate that is initially in equilibrium with its depleted matrix. The derived dissolution kinetics is characterized by R(t)=R 0−K√Dt, where R(t) is the precipitate radius or half-thickness as a function of time (t) during dissolution, R0 is the precipitate radius or half-thickness at the ...
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Kinetics of Dissolution of Glassy Fertilizers

Russian Journal of Applied Chemistry, 2005
Slowly soluble phosphate glasses are a promising material for new environmentally safe fertilizers. The kinetics of the dissolution of phosphate glasses used for the development of fertilizers was studied.
K. G. Karapetyan, V. A. Senichenkov, G. S. Zenin, M. N. Ryabova   +3 more
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The kinetics of gibbsite dissolution in NaOH

Hydrometallurgy, 2009
Abstract The dissolution of aluminum hydroxides from bauxite ores constitutes a key process in the aluminum industry. Generally, aluminum minerals in bauxites are present in the form of gibbsite and/or boehmite. Kaolinite, an aluminosilicate that is also present in bauxites, is a critical contaminant of the process. The understanding of the effect of
Janaína A.M. Pereira, Marcio Schwaab, Enrico Dell'Oro, José Carlos Pinto, José L.F. Monteiro, Cristiane A. Henriques   +5 more
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Kinetics of Mineral Dissolution

2008
The rates of mineral dissolution contribute to processes controlling soil fertility, porosity in aquifers and oil reservoirs, transport and sequestration of contaminants and CO2, cycling of metals and formation of ore deposits, and many other geochemical characteristics and phenomena.
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Kinetics of growth and dissolution of fluorapatite

Journal of Crystal Growth, 1996
Abstract Seeded growth and dissolution experiments with fluorapatite microcrystals in solutions with Ca:P:F = 10:6:2 and with constant values of pH in the range 5.0 S S 2 from the growth results and 42 mJ/m 2 from the dissolution results.
Jørgen Christoffersen, Margaret R. Christoffersen, Thue Johansen   +2 more
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Kinetics of Enamel Dissolution

1981
The fact that enamel dissolves in acidic media has contributed to the universal problem of dental caries. The occurrence of this disease is dependent on many factors of which one is tooth enamel. Since enamel consists mainly of inorganic calcium and phosphate in the form of hydroxyapatite (HAP), studies on the dissolution of enamel have often used ...
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Dissolution kinetics with feedback

1994
Consider a solid particle composed of chemical A. the particle is in a solution of chemical B. As the particle dissolves, the A that enters the solution reacts with B to form chemical C. Then C diffuses back to the particle and adsorbs to the particle’s surface.
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Kinetics and Mechanisms of Cholesterol Gallstone Dissolution

Hepatology, 1984
The purpose of this paper is to review the past and current in vitro studies aimed at understanding the mechanisms of cholesterol gallstone dissolution in bile. As is pointed out, there has been considerable progress in this area during the past 15 years with regard to the physical chemistry of the dissolution process.
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