Results 311 to 320 of about 937,708 (339)
Dissolution Rate Equations in CoIumn-Confined Dissolution [PDF]
Journal of Pharmaceutical Sciences, 1976 Equations are derived for the dissolution of a soluble solid in a column into a liquid stream. The equations are substantiated by experiments using oxalic acid dihydrate as a test substance. The dissolution rate constant, k, of oxalic acid dihydrate depends on linear velocity, v (centimeters per second), by the following equation: k = (2.54 +/- 0.76) X
Kailash Dhupar, Jens T. Carstensen
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Journal of Pharmaceutical Sciences, 1972
Equations for use in studies of dissolution are derived from simple Noyes-Whitney kinetics. In one model the amount of drug added to the test system, Wo, is equal to the saturation capacity of the system, Ws In the second model an equation is derived for use when Wo ≠Ws It was found that the dissolution of hydrocortisone, in both distilled water and ...
P. Sharkey, C.T. Rhodes, M.P. Short
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Equations for use in studies of dissolution are derived from simple Noyes-Whitney kinetics. In one model the amount of drug added to the test system, Wo, is equal to the saturation capacity of the system, Ws In the second model an equation is derived for use when Wo ≠Ws It was found that the dissolution of hydrocortisone, in both distilled water and ...
P. Sharkey, C.T. Rhodes, M.P. Short
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Digestive Diseases, 1993
Gallstones represent a major health problem in western society. For symptomatic gallstones, cholecystectomy is the gold standard. A considerable number of patients, however, cannot tolerate or are unwilling to undergo surgery and anaesthesia. For these patients, dissolution therapy, administered either systemically ('oral dissolution') or directly into
Plaisier Pw +2 more
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Gallstones represent a major health problem in western society. For symptomatic gallstones, cholecystectomy is the gold standard. A considerable number of patients, however, cannot tolerate or are unwilling to undergo surgery and anaesthesia. For these patients, dissolution therapy, administered either systemically ('oral dissolution') or directly into
Plaisier Pw +2 more
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2014
Validation of dissolution methods is the main focus of this chapter. There is a brief overview of the dissolution test and method development. The topics of sampling, filtration, and single-point test versus a dissolution profile are then discussed. Analytical validation of the dissolution test is described in detail with typical tolerances.
Thomas W. Rosanske, Vivian A. Gray
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Validation of dissolution methods is the main focus of this chapter. There is a brief overview of the dissolution test and method development. The topics of sampling, filtration, and single-point test versus a dissolution profile are then discussed. Analytical validation of the dissolution test is described in detail with typical tolerances.
Thomas W. Rosanske, Vivian A. Gray
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Primary Care: Clinics in Office Practice, 1981
The use of chenodeoxycholic acid, ursodeoxycholic acid, and mono octanoin in the dissolution of gallstones is examined as an alternative to surgery. It is conjectured that as many as 80 per cent of radiolucent gallstones can be dissolved using these agents, although factors of cost must be considered in cases in which lifelong medication is required.
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The use of chenodeoxycholic acid, ursodeoxycholic acid, and mono octanoin in the dissolution of gallstones is examined as an alternative to surgery. It is conjectured that as many as 80 per cent of radiolucent gallstones can be dissolved using these agents, although factors of cost must be considered in cases in which lifelong medication is required.
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European Journal of Oral Sciences, 1973
abstract— Each of six premolars were exposed to 8 ml of a buffer, pH 5.0. The ionic activity products for FA, HA, CaHPO4, CaF2 and Ca4H(PO4)3 were determined. It was found that the liquid phase initially was unsaturated with respect to all solid phases and that FA and HA were dissolving from the enamel.
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abstract— Each of six premolars were exposed to 8 ml of a buffer, pH 5.0. The ionic activity products for FA, HA, CaHPO4, CaF2 and Ca4H(PO4)3 were determined. It was found that the liquid phase initially was unsaturated with respect to all solid phases and that FA and HA were dissolving from the enamel.
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2022
How are state dissolutions different from secessions? In theory, a dissolution extinguishes the predecessor state, and its former constitutive units emerge as new states and new persons of international law. Conversely, a successful secession means that one part of an existing state becomes a new state and a new person of international law, while the ...
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How are state dissolutions different from secessions? In theory, a dissolution extinguishes the predecessor state, and its former constitutive units emerge as new states and new persons of international law. Conversely, a successful secession means that one part of an existing state becomes a new state and a new person of international law, while the ...
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Percolation view of novolak dissolution and dissolution inhibition
Macromolecules, 1992The dissolution of novolak and other phenolic resins in aqueous alkali is controlled by the diffusion of developer base in the solid matrix. The base penetrates the resin by a series of transfers or jumps from one hydrophilic (phenol/phenolate) site to the next and requires an unbroken sequence of sites in the diffusional pathway.
Tung Feng Yeh +2 more
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The Dissolution of the Monasteries [PDF]
History, 2011 AbstractIt is generally held that the monasteries were dissolved by Henry VIII and his leading minister Thomas Cromwell for financial reasons. This article suggests that more important factors were Henry VIII's determination to assert his royal authority and more clearly religious reasons, especially an erasmian scepticism about the value of ...
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Dissolution of Lamellar Phases
The Journal of Physical Chemistry B, 2011Dissolution of surfactant liquid crystals is an important process both at the manufacturing stage of surfactant based formulated products and during their use. Dissipative particle dynamics simulations were employed to study the production of surfactant-oil-water systems under both temperature and water quenches.
Rodgers, Thomas L. +2 more
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