Results 271 to 280 of about 5,482,491 (310)
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Anodic dissolution of metals at high rates
IBM Journal of Research and Development, 1993Electrochemical metal shaping and finishing processes involve anodic dissolution of metals at high rates. This paper presents a review of some fundamental aspects related to the understanding of such processes. Included are discussions of the phenomena of passive film breakdown that lead to the transpassive dissolution of metals, some of the available ...
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Variability of Zinc Oxide Dissolution Rates
Environmental Science & Technology, 2017Zinc oxide (ZnO) is of widespread use for numerous applications, including many in the cosmetic industry. Thus, ZnO particles are quite likely to enter the environment. ZnO may be harmful because of the release of cytotoxic Zn2+ ions during dissolution reactions.
Monika Michaelis +3 more
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Precision Apparatus for Dissolution Rate Determinations
Journal of Pharmaceutical Sciences, 1964An 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
2008Information 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, 1998Samples 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 +2 more
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Variability of Dissolution Rates at Constant Undersaturation
Journal of Colloid and Interface Science, 2002Dissolution 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, 1973The 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 +3 more
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Solubility and Dissolution Rate
2019In 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, 1993Abstract 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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