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  • 1
    Electronic Resource
    Electronic Resource
    Rheological behavior in the didodecyldimethylammonium bromide/water system (2000)
    Springer
    Colloid & polymer science 278 (2000), S. 37-47 
    Details
    ISSN: 1435-1536
    Keywords: Key words Vesicles ; Lamellar liquid crystals ; Viscoelasticity ; Thixotropic-antithixotropic
    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 phase behavior in the dilute region of the didodecyldimethylammonium bromide (DDAB)/water system is studied with a battery of techniques. The critical vesicle concentration (cvc), measured by tensiometry, conductimetry, ion-selective-electrode potentiometry and dye solubilization, is similar to the value reported in the literature. Moreover, the combination of surfactant-ion-selective- electrode and bromide-ion-selective-electrode potentiometry indicates that the vesicles are substantially ionized (α ≈ 0.5) in the proximity of the cvc. The transition from small unilamellar vesicles to larger multilamellar liposomes was detected at 0.2 wt% by viscometry, conductimetry and dye solubilization measurements. The rheology of the DDAB/water system was studied as a function of surfactant concentration and temperature. Non- Newtonian behavior, viscoelasticity, yield stresses and time-dependent flow behavior were observed. Maxima and minima in the dynamic moduli and in conductivity are related to structural changes and phase transitions. Moreover, in time-dependent shear flow, the microstructure is modified and the rheological response shifts from thixotropic to antithixotropic or vice versa, depending on the DDAB concentration and the level and duration of the final applied stress. The conductivity behavior in the Lam1 phase region can be qualitatively explained by the capillary superconductivity theory. This conductivity behavior occurs when the thickness of the aqueous lamella is of the same order of magnitude as the Debye length.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003960050006
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  • 2
    Electronic Resource
    Electronic Resource
    Effect of low doses of heparin on the plasma binding of phenytoin and prazosin in normal man (1983)
    Springer
    European journal of clinical pharmacology 25 (1983), S. 211-214 
    Details
    ISSN: 1432-1041
    Keywords: heparin ; protein binding ; phenytoin ; prazosin ; lipases ; plasma triglycerides
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The effect of low doses of heparin on the binding of phenytoin and prazosin to plasma proteins was evaluated in four normal subjects. Heparin activates the hydrolysis of triglycerides in plasma. The ensuing increase in non-esterified fatty acids (NEFA) was more marked in vitro than in vivo and increased the free fraction (FF) of phenytoin and prazosin in plasma. The higher FF caused a change in the plasma to whole blood ratio (P/B ratio) of both drugs. The changes in FF and P/B ratio after heparin were small, but could be of significance in pharmacokinetic studies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00543793
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  • 3
    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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  • 4
    Electronic Resource
    Electronic Resource
    Prescribing patterns in an outpatient psychiatric clinic (1984)
    Springer
    European archives of psychiatry and clinical neuroscience 234 (1984), S. 220-223 
    Details
    ISSN: 1433-8491
    Keywords: Psychotropic drugs ; Prescribing patterns ; Drug utilization ; Psychiatric outpatients
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Prescribing patterns were studied in a psychiatric outpatient clinic. Psychiatrists tended to prescribe large quantities of antidepressants or other drugs. In contrast, the daily doses for antidepressants and neuroleptics were often too low. Significant variations were noted between three outpatient clinics in the choices among a various psychotropic drugs from a given therapeutic group.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00381352
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  • 5
    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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  • 6
    Electronic Resource
    Electronic Resource
    A chitosan-templated monolithic siliceous mesoporous-macroporous material (2000)
    Springer
    Colloid & polymer science 278 (2000), S. 964-971 
    Details
    ISSN: 1435-1536
    Keywords: Key words MCM-41 synthesis ; Chitosan ; Mesoporous–macroporous material ; Monolithic material
    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  We synthesised a porous siliceous material via hydrothermal hydrolysis of sodium silicate, using chitosan as a template. As far as we know, this is the first synthesis of siliceous porous material using chitosan as a template in a hydrothermal way. A fibrous material was obtained, whose macroscopic fibres were formed by a spongelike siliceous network with pores having a radius of 0.57 μm. The siliceous walls of the pores were, in turn, of the form of a microporous–mesoporous material; the pore radius distribution was polymodal with maxima at 0.84, 1.0, 1.2 and 1.5 nm and a broad band between 3 and 10 nm. This structure may be due to the aggregation of the hydrated chitosan helices in bundles of parallel fibres with different size and the gelation of the system. The aggregation process might be induced by the addition of silicate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003960000348
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  • 7
    Electronic Resource
    Electronic Resource
    Generalization of biomechanical rules for the fixation of bone, joint, and tooth replacements (1980)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 14 (1980), S. 537-543 
    Details
    ISSN: 0021-9304
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jbm.820140420
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  • 8
    Electronic Resource
    Electronic Resource
    Darstellung, Struktur und Temperaturabhängigkeit der Phasenbreite der Phase Ca2-xAs1-xBr1+x und thermisches Verhalten der Verbindung Ca3AsBr3Professor Robert Juza zum 80. Geburtstage am 8. Dezember 1984 gewidmet (1984)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 518 (1984), S. 77-86 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Preparation, Crystal Structure, and Temperature Dependence of the Homogeneity Range of the Phase Ca2-xAs1-xBr1+x and Thermal Behaviour of Ca3AsBr3The phase (Ca2-x□x)(As1-xBr1+x) (yellow, NaCl type lattice, x ≙ degree of substitution) was prepared from “Ca3As2” and CaBr2 in different molar ratios in steel ampoules under argon at 900 and 950°C resp. The lattice constant as a function of the composition, the homogeneity range, and dependence of the bromine rich phase boundary on the temperature were determined. The structure was deduced from single crystal X-ray investigation and density measurements at different compositions.The thermal behaviour of Ca3AsBr3 (colourless, isotypic to Mg3NF3, prepared at 850°C) was studied by annealing samples in molybdenum ampoules under argon in the temperature range 900-1250°C and by differential thermal analysis.From the experimental results a section of the phase diagram Ca3As2-CaBr2 was constructed.
    Notes: (Ca2-x□x)(As1-xBr1+x) (gelb, NaCl-Typ, x ≙ Substitutionsgrad) stellte man aus „Ca3As2“ und CaBr2 (unterschiedliche Molverhältnisse) in Stahlampullen unter Argon bei 900 bzw. 950°C dar. Die Abhängigkeit der Gitterkonstante von der Zusammensetzung, der Homogenitätsbereich und die Temperaturabhängigkeit der bromidreichen Phasengrenze wurden ermittelt. Die Struktur bestimmte man durch die röntgenographische Einkristalluntersuchung und durch Dichtemessungen bei unterschiedlichen Zusammensetzungen.Das thermische Verhalten des Ca3AsBr3 (farblos, Mg3NF3-Typ, dargestellt bei 850°C) untersuchte man durch Erhitzen von Proben in Molybdänampullen unter Argon im Temperaturbereich 900 bis 1250°C und durch differenzthermoanalytische Messungen.Mit den experimentellen Ergebnissen wurde ein Ausschnitt aus dem Zustandsdiagramm Ca3As2-CaBr2 konstruiert.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19845181108
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  • 9
    Electronic Resource
    Electronic Resource
    Schwingungsspektren und Kraftkonstanten symmetrischer Kreisel. XXI [1]. Das Schwingungs-Rotationsspektrum von CF379Br und CF381Br im Bereich von v2Professor Josef Goubeau zum 80. Geburtstage am 31. März 1981 gewidmet (1981)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 474 (1981), S. 74-82 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Vibrational Spectra and Force Constants of Symmetric Tops. XXI. Rovibrational Spectrum of CF379Br and CF381Br in the v2 RegionThe rovibrational spectrum of CF379Br and of natural CF3Br has been recorded in the region of the fundamental v2 near 750 cm-1 in the i.r. with a resolution of 0.04 cm-1. From the analysis of the spectra the values of v0, the anharmonicity constants x23, x25 and x26 as well as B″ and B′ from the J structure have been obtained both for CF379Br and CF381Br. v2 displays Fermi resonance with 2v3 which is located near 700 cm-1.
    Notes: Das Schwingungs-Rotations-Spektrum von CF379Br und natürlichem CF3Br wurde im Bereich der Grundschwingung v2 nahe 750 cm-1 im IR mit einer Auflösung von 0,04 cm-1 aufgenommen. Aus der Analyse der Spektren konnten für CF379Br und CF381Br v0, die Anharmonizitätskonstanten x23, x25 und x26 sowie aus der J-Struktur die Werte B″ und B′ ermittelt werden. v2 steht in Fermi-Resonanz mit 2v3 bei ∼700 cm-1.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19814740308
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