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  • Articles: DFG German National Licenses  (12)
  • Inorganic Chemistry  (8)
  • pharmacokinetics  (4)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 45 (1993), S. 585-587 
    ISSN: 1432-1041
    Keywords: Flumazenil ; benzodiazepine ; absorption ; disposition ; elderly volunteers ; pharmacokinetics ; aging
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary In an open design, randomised, two-way cross-over study, a single 2 mg i.v. dose and a single 30 mg oral dose of flumazenil were each administered to a group of healthy young (n=6) and elderly (n=12) volunteers (male: female 2/1). Plasma samples were collected at intervals and intact drug was assayed. Both the IV and oral doses of flumazenil were very well tolerated by both age groups and no severe or unexpected adverse effects were observed. The main complaints were dizziness and headache, mainly after oral dosing, probably due to the higher Cmax and AUC following this route of administration. After 2 mg i. v. the disposition parameters in the two age groups (elderly/young) were very similar: volume of distribution (Vss): 0.88/0.901·kg−1; total body clearance (ClPL): 0.86/0.99 l·min−1; terminal elimination half-life (t1/2β): 1.02/0.91 h. After the 30 mg oral dose the mean Cmax of 87.6 ng·ml−1 (elderly) and 78.4 ng·ml−1 (young) were generally reached within 0.5 to 1 h. In 26% (elderly) and 23% (young), the absolute bioavailability of flumazenil was very similar. It is concluded that the absorption and disposition paramters of flumazenil were not significantly affected by aging.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 43 (1992), S. 209-210 
    ISSN: 1432-1041
    Keywords: Moxonidine ; Hydrochlorothiazide ; pharmacokinetics ; drug interaction ; steady-state ; healthy volunteers ; adverse effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 28 (1985), S. 213-219 
    ISSN: 1432-1041
    Keywords: thiamine ; plasma level ; pharmacokinetics ; nonlinear renal elimination ; assay for clinical use
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary A sensitive assay for thiamine suitable for clinical use has been developed. It is based on precolumn oxidation of thiamine to thiochrome followed by HPLC-separation and fluorescence detection. The assay is applicable to various biological materials, including human plasma. The minimum amount detectable was 5 fmol, minimum plasma concentration 0.5 nmol/l and minimum sample volume 0.3 ml plasma. Each chromatographic run took 3 min. Inter- and intra-assay relative standard deviations (RSD) were 8.3% and 6.3%, respectively, at a stock plasma concentration of 10.8 nmol/l. At 38.8 nmol/l, interassay RSD was reduced to 3.4%. The recovery of 5 nmol/l added thiamine was 102 (SD±17)%, that of 30 nmol/l was 94±5%. Plasma levels in 91 volunteers ranged from 6.6 to 43 nmol/l, showing a log normal distribution with a median of 11.6 nmol/l. Thiamine kinetics were studied in plasma and urine from 8 men after intravenous and oral doses of 50, 100 and 200 mg thiamine hydrochloride. In all individuals, nonlinear renal elimination kinetics were demonstrated by plotting the fractional amount of thiamine excreted unchanged in urine against the corresponding area under the plasma concentration — time curve.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 38 (1990), S. 237-242 
    ISSN: 1432-1041
    Keywords: cyclosporin A ; diltiazem ; pharmacokinetics ; kidney transplantation ; drug metabolism ; cytochrome P-450 ; drug interactions ; human liver microsomes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary Previous reports have indicated that administration of the calcium antagonist diltiazem results in major changes in the pharmacokinetics of cyclosporin A (CyA). A new clinical trial was undertaken in 22 renal transplant patients receiving a constant dose of cyclosporin to further explore this interaction. Coadministration of diltiazem for one week produced an increase in the blood concentration of CyA and its metabolites 17 and 18 in almost all patients, but no increase in CyA metabolites 1 and 21. The mean whole blood CyA trough level determined by HPLC rose from 117 ng·ml−1 to 170 ng·ml−1 after one week on diltiazem, and the mean trough level of metabolite 17 rose similarly from 184 ng·ml−1 before to 336 ng·ml−1. Based on experiments with microsomes from human liver the effect of diltiazem was due to noncompetitve inhibition of CyA-metabolism by diltiazem, and the increased concentration of metabolite 17 might have been due to stronger inhibition of its secondary metabolism steps.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 74 (1912), S. 297-309 
    ISSN: 0863-1778
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 201 (1931), S. 41-74 
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 14 Ill.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 623 (1997), S. 1529-1534 
    ISSN: 0044-2313
    Keywords: Formation of NH4[Ge(NH3)F5] ; structure ; ammonolysis ; ir spectrum ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Ammonolysis Reaction of (NH4)2GeF6. Synthesis and Structure of NH4[Ge(NH3)F5](NH4)2GeF6 reacts with ammonia to yield NH4[Ge(NH3)F5] at 280°C. The reaction path was elucidated by in situ time and temperature resolved X-ray powder diffraction. NH4[Ge(NH3)F5] crystallizes isostructurally to NH4[Si(NH3)F5] in the tetragonal space group P4/n (No. 85) with lattice constants a = 619.41(1) pm and c = 724.70(1) pm. The germanium atom is coordinated by five fluorine atoms and the nitrogen atom of the ammonia molecule. The ammonium cation is located on the Wyckoff position (2 a) in P4/n. The crystal structure is stabilized by extensive hydrogen bonding.
    Notes: (NH4)2GeF6 reagiert mit Ammoniak bei 280°C zu NH4[Ge(NH3)F5]. Der Reaktionsverlauf wurde in situ mit Hilfe der zeit- und temperaturaufgelösten Röntgenpulverdiffraktometrie verfolgt. Das so dargestellte NH4[Ge(NH3)F5] kristallisiert isostrukturell mit NH4[Si(NH3)F5] in der tetragonalen Raumgruppe P4/n (Nr. 85) mit den Gitterkonstanten a = 619,41(1) pm und c = 724,70(1) pm. Dabei ist das Germaniumatom verzerrt oktaedrisch von fünf Fluoratomen und dem Stickstoffatom des Ammoniakmoleküls koordiniert. Das Ammoniumion liegt auf der Tetraederpunktlage (2 a) in P4/n. Die Verbindung wird durch Wasserstoffbrückenbindungen stabilisiert.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 367 (1969), S. 40-43 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The course of interactions betweens some aliphatic nitriles and PCI5 has been investigated by means of 31P—NMR spectroscopy. Phosphazo compounds are formed, and chlorination occurs. Three examples of cis-trans isomeric phosphazo compounds were found.
    Notes: Der Ablauf von Reaktionen einiger aliphatischer Nitrile mit PCI5 wurde mit Hilfe der 31P—KMR-Spektroskopie untersucht. In allen Fällen entstehen Phosphazoverbindungen; außerdem tritt Chlorierung ein. Drei Beispiele von cis-trans-isomeren Phosphazoverbindungen wurden gefunden.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 473 (1981), S. 153-165 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Bor-Stickstoff-Verbindungen. 92. Spektroskopische untersuchungen an bis(dimethylamino)boranenDie schwingungsspektren von bis(dimethylamino)boranen [(CH3)2N]2BX mit X = H, D, CH3 und CD3 wurden aufgenommen; die Zuordnungen zu den Grundschwingungen stehen im Einklang mit den Ergebnissen einer Normalkoordinatenanalyse. Des weiteren werden einige kernmagnetische Resonanzdaten von Bis(dimethylamino)boranen diskutiert.
    Notes: The vibrational spectra of bis(dimethylamino)boranes, [(CH3)2N]2BX with X = H, D, CH3 or CD3 have been examined and assignments to the fundamental vibrations are supported by the results of a normal coordinate analysis. In addition, some nuclear magnetic resonance data on bis(dimethylamino)boranes are discussed.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 483 (1981), S. 51-62 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Bor-Stickstoff-Verbindungen. 94. Reaktionen von Dimethylaminoboranen mit PyrazolIn Abhängigkeit von den Reaktionsbedingungen führt die Umsetzung von Tris(dimethylamino)boran mit Pyrazol (Hpz) zu (CH3)2HNBpz3 (III) oder den Pyrazabolen B2pz4[N(CH3)2]2 (IV, cis- und trans-Isomeres), B2pz5N(CH3)2 (Va) oder B2pz6. Die Reaktion scheint über das äußerst kurzlebige [(CH3)2N]2Bpz und  -  insbesondere  -  monomeres (CH3)2NBpz2 zu verlaufen; letztere Verbindung kann massenspektroskopisch identifiziert werden. Im System Bis(dimethylamino)phenylboran-Pyrazol wurden (CH3)2HNB(C6H5)pz2 und das Pyrazabol B2pz3(C6H5)2N(CH3)2 (VII, cis- und trans-Isomeres) erhalten. Außerdem wurden einige Daten des Pyrazabols B2pz2(C6H5)2[N(CH3)2]2 erhalten, obwohl die Verbindung nicht im Reinzustand isoliert werden konnte. Die Existenz von monomerem (CH3)2NB(C6H5)pz konnte nachgewiesen werden.
    Notes: Depending on the reaction conditions, the interaction of tris(dimethylamino)borane with pyrazole (Hpz) yields (CH3)2HNBpz3 (III) or the pyrazaboles B2pz4[N(CH3)2]2 (IV, cis and trans isomer), B2pz5N(CH3)2 (Va), or B2pz6. There is evidence that the reactions proceed via the extremely short-lived [(CH3)2N]2 Bpz and, in particular, monomeric (CH3)2NBpz2; the latter species can be identified in the mass spectrometer. In the system bis(dimethylamino)phenylborane/pyrazole the species (CH3)2HNB(C6H5)pz2 and the pyrazabole B2pz3(C6H5)2N(CH3)2 (VII, cis and trans isomer) were obtained. Also, some data on the pyrazabole B2pz2(C6H5)2[N(CH3)2]2 were collected although the compound could not be isolated in the pure state. The existence of the monomer (CH3)2NB(C6H5)pz could be established.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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