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  • 1
    Electronic Resource
    Electronic Resource
    Improved thermophysical measurements on solid and liquid tantalum (1992)
    Springer
    International journal of thermophysics 13 (1992), S. 83-93 
    Details
    ISSN: 1572-9567
    Keywords: electrical resistivity ; enthalpy ; high temperatures ; liquid metal ; pulse method ; specific heat ; tantalum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Wire-shaped tantalum samples are resistively pulse heated as part of a coaxially constructed capacitor discharge circuit. With heating rates of more than 109 K · s−1, temperatures up to about 10,000 K are reached. The tantalum wire is contained, with water as the surrounding medium, in a high-pressure vessel with sapphire windows and a maximum pressure capability of 5 kbar. Time correlated measurements of the current through the wire and the voltage drop across it, as well as surface radiation and wire expansion, were performed to permit the determination of thermophysical properties of the solid and liquid tantalum.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00503358
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  • 2
    Electronic Resource
    Electronic Resource
    A submicrosecond pulse heating system for the investigation of thermophysical properties of metals at high temperatures (1986)
    Springer
    International journal of thermophysics 7 (1986), S. 139-147 
    Details
    ISSN: 1572-9567
    Keywords: electrical resistivity ; enthalpy ; exploding wire ; high temperature ; liquid metals ; pulse method ; thermal expansion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A submicrosecond ohmic pulse heating technique is described for measurements of thermal properties of cylindrical metallic samples at high temperatures. Electrical and optical measurements for determination of thermophysical data such as enthalpy, specific heat, and electrical resistivity are presented. Effects that can falsify the results are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00503805
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  • 3
    Electronic Resource
    Electronic Resource
    Thermophysical measurements on solid and liquid rhenium (1986)
    Springer
    International journal of thermophysics 7 (1986), S. 149-159 
    Details
    ISSN: 1572-9567
    Keywords: electrical resistivity ; enthalpy ; high temperatures ; pulse method ; rhenium ; specific heat ; thermal expansion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A fast resistive heating technique was used to measure such thermophysical data of solid and liquid rhenium as enthalpy, specific heat, thermal volume expansion, and electrical resistivity. The measurements are performed with heating rates of slightly more than 109 K · s −1 up to states of superheated liquid rhenium (7500 K).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00503806
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  • 4
    Electronic Resource
    Electronic Resource
    Oberflächenbehandlung von Kohlenstoffasern und mechanische Eigenschaften von Laminaten (1985)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 16 (1985), S. 232-238 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Additional Material: 18 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19850160705
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  • 5
    Electronic Resource
    Electronic Resource
    Selective quantification of ambroxol in human plasma by HPLC (1986)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 9 (1986), S. 561-565 
    Details
    ISSN: 0935-6304
    Keywords: Liquid chromatography, HPLC ; Pharmacokinetics ; Quantification in human plasma ; Bronchosecretolyticum ; Separation from metabolites ; Ambroxol ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The bronchosecretolytic drug ambroxol can be reliably quantified in human plasma by high performance liquid chromatography. Plasma is buffered alkaline, extracted with ether, and the organic solvent back-extracted with diluted acid. An automatically sampled aliquot is separated by reversed phase HPLC; the analyte is well separated from two metabolites that interfered strongly in earlier methods. UV detection at 230 nm enables a lower limit of quantitation of 5 ng/ml. Internal standardization with propranolol allows accurate and precise quantification. Evaluation of the optimized combination of mobile and stationary phase is described, and application of the method to experimental and clinical pharmacokinetic studies is illustrated.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240091004
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  • 6
    Electronic Resource
    Electronic Resource
    Automated determination of nifedipine in human plasma by capillary gas chromatography with electron capture detection (1986)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 9 (1986), S. 397-399 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography, GC ; Capillary columns ; Nifedipine ; Determination in human plasma ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A rapid, sensitive, and reliable method for the determination of nifedipine in human plasma is described. Using a single-step solvent extraction and capillary gas chromatography combined with electron capture detection, an assay sensitivity of 2 ng/ml is achieved routinely using 0.5 ml of plasma. Intact nifedipine is quantitated and separated from its nitroso- and nitropyridine-derivatives. The suitability of the assay for pharmacokinetic studies is illustrated.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240090706
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  • 7
    Electronic Resource
    Electronic Resource
    Determination of glibenclamide in human serum by HPLC (1986)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 9 (1986), S. 102-105 
    Details
    ISSN: 0935-6304
    Keywords: Liquid chromatography, HPLC ; Pharmacokinetics ; Quantitation in human serum ; Antidiabeticum ; Glibenclamide ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The antidiabetic drug glibenclamide can be reliably quantitated in human serum with high performance liquid chromatography. The serum is buffered and extracted with toluene. The organic solvent is evaporated, the residue dissolved in the mobile phase and an aliquot sampled automatically and chromatographed. UV-detection at 229 m allows a lower limit of quantitation of 5 ng/ml. Precise handling of exact volumes facilitates external calibration. Statistical data for imprecision and inaccuracy are given and illustrate reliable quantification. Application of the method to experimental and clinical pharmacokinetic studies with specific problems is illustrated.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240090209
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  • 8
    Electronic Resource
    Electronic Resource
    Determination of bile acids and lysolecithin in artificial and natural gastric juice by HPLC for characterization of antacida (1985)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 8 (1985), S. 831-837 
    Details
    ISSN: 0935-6304
    Keywords: Liquid chromatography, HPLC ; Characterization of antacida ; Gastric juice ; Bile acids ; Lysolecithin ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Work-up procedures and HPLC separation systems for determination of taurocholic, glycocholic, chenodeoxycholic, and cholic acids and lysolecithin in artificial and natural gastric juice are described. These compounds are used for testing the binding capacity of antacida to the individual analytes. Work-up is simple, no extraction or filtration being required. The optimized combinations of stationary and mobile phases allow selective and sensitive determination of the respective bile acids in gastric juice. For optimization, the capacity factors of two related bile acids were evaluated for numerous commercial stationary phases. The mechanism of retention is different for free and conjugated bile acids. Special aspects of routine analysis are discussed.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240081205
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    Femtogram level quantitative determination of nitroglycerin and metabolites in human plasma by GC-MS negative ion chemical ionization, single ion monitoring (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 68-71 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography/mass spectrometry ; Capillary, fused silica ; Negative ion ; Femtogram sensitivity ; Nitroglycerin ; Organic nitrates ; Dinitroglycerin ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Recent developments in the use of negative ion detection in GC-MS have indicated the potential for highly sensitive analyses for certain compounds. This paper describes the application of the techniques to the assay of Nitroglycerin and its metabolites yielding sensitivity to two femtograms. Because of the low levels of nitroglycerin in biological media such sensitivity is highly desirable if not essential for meaningful measurements. In addition to sensitivity the method is shown to yield extremely good selectivity contributing further to the credibility of quantitative results.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240060204
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    Paper (German National Licenses)
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  • 10
    Electronic Resource
    Electronic Resource
    Improved automated simultaneous determination of isosorbide dinitrate and its metabolites in plasma by capillary column gas chromatography (1984)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 7 (1984), S. 58-65 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography/ECD ; Capillary, fused silica ; Isosorbide dinitrate ; Isosorbide-/isomannide-/isoidide-mononitrates ; Human plasma ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: An automated specific and sensitive method for the simultaneous determination of isosorbide dinitrate and its metabolites isosorbide-2-mononitrate, isosorbide-5-mononitrate, isomannide mononitrate, and isoidide mononitrate at concentrations down to 0.5, 1, 3, 2, and 2 ng/ml, respectively, in human plasma is described. The procedure involves the extraction of the drug and its metabolites together with their internal standards isomannide dinitrate and o-nitrobenzyl alcohol from plasma with dicholromethane.The analysis is carried out by fused silica capillary gas chromatography using a 63Ni-electron capture detector. The method is applied to the pharmacokinetics of isosorbide dinitrate in humans.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240070202
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