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  • 1
    Electronic Resource
    Electronic Resource
    Quantitative determination of acemetacin and its metabolite indometacin in blood and plasma by column liquid chromatography
    Amsterdam : Elsevier
    Journal of Chromatography B: Biomedical Sciences and Applications 375 (1986), S. 331-338 
    Details
    ISSN: 0378-4347
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0378-4347(00)83725-1
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  • 2
    Electronic Resource
    Electronic Resource
    Primary structure of protein S11 from Escherichia coli ribosomes
    Amsterdam : Elsevier
    FEBS Letters 121 (1980), S. 117-122 
    Details
    ISSN: 0014-5793
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0014-5793(80)81278-6
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  • 3
    Electronic Resource
    Electronic Resource
    Magnetostructural transition in NdCu2 (2000)
    Springer
    The European physical journal 18 (2000), S. 559-563 
    Details
    ISSN: 1434-6036
    Keywords: PACS. 71.20.Eh Rare earth metals and alloys - 75.30.Kz Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.) - 75.80.+q Magnetomechanical and magnetoelastic effects, magnetostriction - 61.12-q Neutron diffraction and scattering
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: The magnetic (H , T)-phase diagram of the orthorhombic compound NdCu2 was investigated for external magnetic fields up to 15 T parallel to the crystallographic c-direction. Magnetization and magnetostriction measurements reveal an anomalous change of the magnetic properties as well as giant magnetostriction (GMS) and large hysteretic effects. This behaviour is similar to that observed in some other RCu2 compounds where it has been interpreted as a conversion of the magnetic Ising axis. In contrast to these other RCu2 compounds, however, the easy axis of magnetization in NdCu2 is the b-axis. The macroscopic measurements are compared with neutron diffraction experiments which reveal GMS along the b-axis and a new magnetic phase with propagation vector in the converted crystal.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100510070002
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  • 4
    Electronic Resource
    Electronic Resource
    Anisotropic magnetic exchange in orthorhombic RCu compounds (R = rare earth) (2000)
    Springer
    The European physical journal 14 (2000), S. 29-42 
    Details
    ISSN: 1434-6036
    Keywords: PACS. 75.30.Et Exchange and superexchange interactions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: The magnetic excitations in the field induced ferromagnetic phase F3 of a NdCu2 single crystal were investigated by means of inelastic neutron scattering experiments. A mean field model using the random phase approximation in connection with anisotropic magnetic bilinear R-R (R denotes a rare earth) exchange interactions is proposed to account for the observed dispersion. The relevance of this model to the analysis of the magnetic ordering process in other RCu2 compounds is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100510050103
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  • 5
    Electronic Resource
    Electronic Resource
    Separation of 30S ribosomal proteins from sulfolobus acidocaldarius by ion exchange and gel permeation chromatography (1986)
    Springer
    Chromatographia 22 (1986), S. 432-432 
    Details
    ISSN: 1612-1112
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02268807
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  • 6
    Electronic Resource
    Electronic Resource
    Fluorimetrische Bestimmung geringer Mengen von Thioxanthenen durch Spaltung zu Thioxanthon bzw. dessen Derivaten (1971)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 253 (1971), S. 357-360 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Psychopharmaka der Thioxanthen-Reihe können durch stark verdünnte Cer(IV)-sulfatlösung zu entsprechenden Thioxanthonen abgebaut werden. Diese sind fluorimetrisch bestimmbar. An Flupenthixol, Chlorprothixen, Prothixen, Clopenthixol und deren sek. Amino-Derivaten wird dieser Abbau gezeigt. Sulfoxide und Meprothixol sind dagegen nicht entsprechend abzubauen. Die Bestimmung von Flupenthixol und von 2-Chlorthioxanthon aus biologischem Material werden beschrieben. Da aus verschiedenen Psychopharmaka der Thioxanthen-Reihe sehr ähnliche und leicht zugängliche Abbauprodukte entstehen, ist diese Methode besonders leicht durchzuführen.
    Notes: Abstract Psychotherapeutics of the Thioxanthene type are degraded to the analogous Thioxanthone derivates in very diluted Ce(SO4)2 solutions. These are determined by fluorescence spectrophotometry. In this way Flupenthixol, Chlorprothixen, Prothixen, Clopenthixol and their secondary amino-derivates are determined quantitatively. The corresponding sulphoxides and Meprothixol are not degraded by Ce(SO4)2 solution. Furthermore, the determination of Flupenthixol and 2-Chlorthioxanthone from biological material is described. The method is especially suitable because the different psychotherapeutics of the Thioxanthene type are degraded to the same kind of degradation product.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00426349
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  • 7
    Electronic Resource
    Electronic Resource
    Bestimmung substituierter Phenylalkanolamine in biologischem Material (1976)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 279 (1976), S. 275-281 
    Details
    ISSN: 1618-2650
    Keywords: Best. von Phenylalkanolaminen in Biolog. Material ; Fluorimetrie ; subst. Verb
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Hydroxy- und/oder methoxy-substituierte Phenylalkanolamine wurden durch Perjodat in hoher Ausbeute zu den entsprechenden Benzaldehyden oxidiert, die nach überführung in Dimethyl- oder DiÄthylacetale auf spezifische und empfindliche Weise fluorimetrisch zu bestimmen sind. Die Methode wurde an ca. 30 Verbindungen geprüft; ihre Anwendbarkeit bei biochemischen Problemen wird hier am Beispiel des Nachweises der renalen Ausscheidung von Etilefrin dargestellt, indem die renale Elimination zweier verschiedener Retardzubereitungen miteinander verglichen wird. 4-OH-substituierte Verbindungen wurden nur unvollstÄndig in die zugehörigen Aldehyde überführt; 3,4-Dihydroxy, und α-Oxoderivate bildeten keine zugehörigen Aldehyde. Im Falle der Nitrooder der Halogensubstitution wurden die korrespondierenden Benzaldehyde in guter Ausbeute gebildet, sie waren aber nicht in fluorescierende Acetale zu überführen.
    Notes: Abstract Hydroxy- and/or methoxy-substituted phenylalkanolamines are oxidized by periodates in high yield to the corresponding benzaldehydes which can be determined specifically and sensitively by fluorimetry after transformation to the dimethyl- or diethyl-acetales. This method was checked on some 30 different compounds and its applicability in the biological field is demonstrated by the determination of the renal excretion of Etilefrine. The renal excretion of Etilefrine was compared following oral administration of two different retard preparations. 4-OH substituted compounds were incompletely transformed to the corresponding aldehydes. 3,4-Dihydroxyderivatives and α-oxo-derivatives formed no corresponding benzaldehydes. In the case of nitro- or halogen-substitution the corresponding benzaldehydes were formed in good yield but they could not be transferred into fluorescent acetales.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00430879
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  • 8
    Electronic Resource
    Electronic Resource
    Beitrag zur Bestimmung von 2-Oxo-pyrrolidin-Derivaten aus biologischem Material (1980)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 304 (1980), S. 407-411 
    Details
    ISSN: 1618-2650
    Keywords: Best. von 2-Oxo-pyrrolidin-Derivaten in Biolog. Material ; Chromatographie, Dünnschicht ; Stabilität, Resorption
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung 2-Oxo-1-pyrrolidin-essigsäure-Derivate lassen sich weder UV-spektroskopisch, colorimetrisch noch fluorimetrisch bestimmen, GC-Bestimmungen sind nur bedingt anwendbar. Zur Bestimmung von 2-Oxo-1-pyrrolidin-essigsäure, deren Amid, Hydrazid sowie 1,2-Bis(2-oxo-pyrrolidin-1-essigsäure)-hydrazid bzw. α,ω-Bis(2-oxo-1-pyrrolidinacetamido)-alkanen in biologischem Material eignet sich die Extraktion der gefriergetrockneten Analysenproben mit Chloroform/Methanol-Gemischen, Dünnschicht-Chromatographie auf Kieselgel und Detektion mit verschiedenen Sprühreagentien. Durch Flächengrößenvergleich/Scannen sind Bestimmungen aus Vollblut, Plasma, Organhomogenaten und Urin möglich. Die Anwendbarkeit der Methode wird am Beispiel von Stabilitätsprüfungen in biologischem Material, Resorptionsnachweisen, Plasma- und Urinspiegeln bei Ratten, Hunden und Menschen demonstriert.
    Notes: Summary Determination of 2-oxo-1-pyrrolidine-acetic acid derivatives cannot be carried out either spectroscopically, colorimetrically or fluorimetrically, and GC determination is only conditionally suitable. For the determination of 2-oxo-1-pyrrolidine-acetic acid, its amide, hydrazide as well as 1,2-bis (2-oxo-pyrrolidine-1-acetic acid)-hydrazide and α,ω-bis(2-oxo-1-pyrrolidine-acetamido)-alkanes in biological material, a suitable method is the extraction of freeze-dried analytical samples with chloroform/methanol mixtures, TLC on silica gel and detection with various spray reagents. Determinations from whole blood, plasma, organ homogenates and urine are possible by spot area comparison or scanning. The practicability of the method is demonstrated with the example of stability tests in biological material, proof of absorption, and determination of plasma and urine levels in rats, dogs and in man.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00480614
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  • 9
    Electronic Resource
    Electronic Resource
    Nachweis von Diphenylpyralin und Metaboliten im menschlichen Urin (1975)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 277 (1975), S. 208-208 
    Details
    ISSN: 1618-2650
    Keywords: Nachw. von Diphenylpyralin im Urin ; Chromatographie, Dünnschicht ; UV-Bestimmung, N-Oxid und Desmethylderivat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00462242
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  • 10
    Electronic Resource
    Electronic Resource
    Zur Analytik von Morocromen in biologischem Material (1982)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 311 (1982), S. 119-122 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Morocromen-Eigenschaften (Löslichkeit, Extraktion, Stabilität, UV, Fluorescenz, DC) werden beschrieben. Aus biologischem Material (Blut, Organe, Galle, Speichel, Schweiß, Faeces und Urin) ist Morocromen bei pH 8,6 mit Chloroform nahezu quantitativ extrahierbar. Quantitative Bestimmung ist UV-spektroskopisch (330 nm), besser fluorimetrisch durchführbar: direkte Bestimmung bei 330/440 nm als Morocromen oder nach Abbau (4 N H2SO4, 100° C) zum stärker fluorescierenden 7-Amino-Derivat bei 309/483 nm ist bei Mengen von 〈0,01–5 μg/ml nach vorheriger DC möglich. Die untere Nachweisgrenze liegt zwischen 0,02 μg/ml (Blut) und 0,008 μg/ml (Urin), die Reproduzierbarkeit zwischen 0,7% (Blut) und 3,0–3,6% (Urin). Die Methoden sind für pharmakokinetische Untersuchungen geeignet.
    Notes: Summary Properties of morocromen (solubility, extractability, stability, UV-, fluorescence and TLC-properties) are described. Morocromen can be extracted quantitatively from biological material (blood, organs, bile, saliva, sweat, faeces and urine) with chloroform at pH 8.6. Quantitative determination can be carried out either by UV-spectroscopy (330 nm), or even better by fluorometry: direct determination at 330/440 nm as morocromen or after degradation (4N H2SO4, 100° C) to the more intensely fluorescing 7-amino-derivative (at 309/483 nm) is possible with amounts of 〈0.01 to 5 μg/ml after previous TLC. The lower detection limit is between 0.02 μg/ml (blood) and 0.008 μg/ml (urine), reproducibility between 0.7% (blood) and 3.0–3.6% (urine). The methods can be used for pharmacokinetic measurements.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00487610
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