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  • 1
    Electronic Resource
    Electronic Resource
    Counterion specificity of the micelle surface and its implications on micellar catalysis (1996)
    Springer
    Colloid & polymer science 274 (1996), S. 662-668 
    Details
    ISSN: 1435-1536
    Keywords: Micellar catalysis ; critical micelle concentration ; micellization ; counterion distribution constants ; hydroxide surfactants
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Dodecyltrimethylammonium bromide — Dodecyltrimethyl-ammonium hydroxide — water mixtures were studied with ion-selective electrodes, and the aggregation behavior, degree of ionization of the micelles and the distribution constants of bromide and hydroxide ions between water and micelles were found, showing that some suppositions about the interpretation of micellar catalysis are incorrect, and these interpretations must be revised. The results support the mass action model for the theoretical treatment of micellar catalysis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00653065
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Role of oxidation polymorphism on blood and urine concentrations of amitriptyline and its metabolites in man (1982)
    Springer
    European archives of psychiatry and clinical neuroscience 232 (1982), S. 215-222 
    Details
    ISSN: 1433-8491
    Keywords: Amitriptyline ; Nortriptyline ; Hydroxylated metabolites ; Oxidation polymorphism ; Hydroxylation polymorphism ; Pharmacogenetics ; Interindividual differences ; Pharmacokinetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We have measured the metabolites (demethylated and hydroxylated) of amitriptyline in a group of seven normal volunteers. They were phenotyped as extensive or poor metabolizers using debrisoquine and bufuralol. The results demonstrate that the oxidative metabolism (aliphatic hydroxylation) of amitriptyline is under the same genetic control as that of debrisoquine and bufuralol. However, phenotypic polymorphism cannot be used to predict amitriptyline blood concentration after a single oral dose, since the principal metabolic pathway of amitriptyline is demethylation and not aliphatic hydroxylation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02141782
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Elimination and pharmacological effects following single oral doses of 50 and 75 mg of amitriptyline in man (1983)
    Springer
    European archives of psychiatry and clinical neuroscience 233 (1983), S. 449-455 
    Details
    ISSN: 1433-8491
    Keywords: Amitriptyline ; Nortriptyline ; Hydroxylated metabolites ; Linear disposition ; Interindividual differences ; Pharmacological effects ; Psychomotor tests
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In a companion paper we described the disposition of a 75 mg single dose of amitriptyline in normal volunteers who were phenotyped as extensive or poor metabolizers of debrisoquine and bufuralol, and had a four-fold range in the oral clearance of the antidepressant, 50 mg of amitriptyline was also administered to the same volunteers. This paper compares the results after both doses and suggests that the disposition of amitriptyline is linear even in subjects with a low oral clearance. There was no relation between the pharmacokinetic data and the intensity of sedation or of psychomotor impairment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00342785
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Hydration of dodecyltrimethyl- ammonium hydroxide micelles (1997)
    Springer
    Colloid & polymer science 275 (1997), S. 396-399 
    Details
    ISSN: 1435-1536
    Keywords: Key words Micelles ; hydration ; hydroxide surfactants ; cationic surfactants
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract  The hydration of dodecyltrimethylammonium hydroxide (DTAOH) micelles was determined by viscosity measurements, giving 39.2±7.0 water molecules per micellized dodecyltrimethylammonium ion. This result is lower than the hydration of DTAB micelles, which is about 65. This difference may be due to the effect of the electrorestrictive structure-making hydroxide ion on the hydration of the alkyltrimethylammonium head group, in comparison with the less hydrated structure-breaking bromide ion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003960050097
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Styrene solubilization in micelles of dodecyltrimethylammonium hydroxide (1997)
    Springer
    Colloid & polymer science 275 (1997), S. 604-607 
    Details
    ISSN: 1435-1536
    Keywords: Key words Solubilization ; hydroxide surfactants ; styrene ; monomers ; micelles
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract  The solubilization of styrene molecules in aqueous dodeciltrimethylammonium Hydroxide (DTAOH) solution was studied by UV-Vis spectroscopy. In short, fully ionized DTAOH aggregates the styrene molecules in the micelle double layer, oriented with their vinyl group to the micelle core and the aryl ring to the intermicellar solution. At increased surfactant concentration, when the aggregates incorporate counterions in their Stern layer, the orientation is maintained, but styrene molecules gradually penetrate into the micelle core as the micelle size and degree of counterion union increased, until they were completely immersed in the hydrocarbon core of rod-like micelles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003960050125
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    Paper (German National Licenses)
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