Results 271 to 280 of about 5,768,654 (309)

Precision Apparatus for Dissolution Rate Determinations

Journal of Pharmaceutical Sciences, 1964
An apparatus particularly useful for intrinsic dissolution rate determinations by the rotating disk method is described. It affords precision speed control, wide range of rotation rates, good shaft concentricity, and maintains constant speed over extended periods of time.
G, LEVY, W, TANSKI
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Dissolution Rates of Surfactants

2008
Information on dissolution rates of surfactants is reviewed and discussed. One or more viscous liquidcrystalline phases form during dissolution in water of pure liquid nonionic surfactants of the linear alcoholethoxylate type, as expected from known equilibrium phase diagrams.
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Improved Dissolution Rate of Indomethacin by Adsorbents

Drug Development and Industrial Pharmacy, 1998
Samples of indomethacin and kaolin or microcrystalline cellulose (Avicel) were prepared by solvent deposition or simple blending methods. Dissolution rates of these samples were studied. The surface adsorption of indomethacin on the studied adsorbents was shown to improve the dissolution rate of the drug in water.
S M, Alsaidan, A A, Alsughayer, A G, Eshra   +2 more
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Variability of Dissolution Rates at Constant Undersaturation

Journal of Colloid and Interface Science, 2002
Dissolution processes play an important role in marble weathering. Investigation of the dissolution kinetics of powdered Pentelic marble, a calcitic natural stone, showed that the rates measured at constant undersaturation decreased with time. It was found that the rate of dissolution decreased sharply to about 50% of the initial value before 5% of the
Malvina G, Orkoula, Petros G, Koutsoukos
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Dissolution Rate Studies III: Effect of Type and Intensity of Agitation on Dissolution Rate

Journal of Pharmaceutical Sciences, 1973
The effect of flow rates on dissolution rates using a continuous flow, column-type apparatus was determined. The flow method of agitation is compared to three other types used with the static beaker procedure. The advantages of the column-type apparatus in attaining low intensities of agitation without sacrificing accuracy or homogeneity are discussed.
J. Tingstad, E. Gropper, L. Lachman, E. Shami   +3 more
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Solubility and Dissolution Rate

2019
In the characterization of powdered materials, solubility and dissolution rate are important properties. These properties may become critical when a powdered material is used as a solution or when it can work effectively in a molecular form in solution.
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The effect of natural weathering on dissolution rates

Geochimica et Cosmochimica Acta, 1993
Abstract Surface area measurements and dissolution experiments were performed on a naturally weathered mineral assemblage rich in quartz and feldspar. The surface areas of unfractured (612 μm) and ground samples were measured at different levels of surface detail, using a dissecting microscope, SEM, and the BET-krypton method.
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Dissolution Rates

Journal of Pharmaceutical Sciences, 1965
D E, WURSTER, P W, TAYLOR
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Dissolution specifications based on release rates

Journal of Pharmaceutical Sciences, 1999
A procedure based on release rates is proposed for the establishment of dissolution specifications that ensure the bioequivalence of a test and a reference product. This procedure, which confines Cmax (the maximum concentration of the drug in vivo) and AUCinfinity (the area under the time-concentration curve, extrapolated to infinity) values within any
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Oxidative Dissolution of Metals in Organic Solvents

Chemical Reviews, 2021
Xiaohua Li, Koen Binnemans
exaly