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  • 1990-1994  (88)
  • 1965-1969  (16)
  • Inorganic Chemistry  (99)
  • Analytical Chemistry and Spectroscopy  (5)
  • 1
    Electronic Resource
    Electronic Resource
    Über ein Oxidchlorid des Calciums: Ca4OCl6 (1991)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 596 (1991), S. 89-92 
    Details
    ISSN: 0044-2313
    Keywords: Calcium oxychloride ; preparation ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: An Oxychloride of Calcium: Ca4OCl6Ca4OCl6 (hexagonal, P63mc, Z = 2), a = 905.8(3), c = 686.3(4) pm, (R = 0.031) crystallizes as colourless needles from reducing melts (CaCl2, Ca) that contain small amounts of „oxygen“. It contains „isolated“ tetrahedral units [Ca4O] and is isotypic with e.g., Ba4OCl6, Yb4OCl6 and K6HgS4. Ca4OCl6 does not form in the dehydration process of, for example, CaCl2 · 6 H2O.
    Notes: Ca4OCl6 (hexagonal, P63mc, Z = 2, a = 905.8(3)); c = 686.3(4) pm, (R = 0,031) kristallisiert in Form farbloser Nadeln aus „reduzierenden Schmelzen“ (CaCl2, Ca), die wenig „Sauerstoff“ enthalten. Es enthält „isolierte“ tetraedrische [Ca4O]-Einheiten und ist isotyp mit z. B. Ba4OCl6, Yb4OCl6 oder K6HgS4. Ca4OCl6 entsteht nicht beim Entwässern von z. B. CaCl2 · 6 H2O.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19915960112
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  • 2
    Electronic Resource
    Electronic Resource
    SFE of PAHs from soils with a high carbon content and analyte collection via combined liquid/solid trapping (1993)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 16 (1993), S. 491-494 
    Details
    ISSN: 0935-6304
    Keywords: Supercritical fluid extraction ; Polynuclear aromatic hydrocarbons ; Liquid/solid traps ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Polynuclear aromatic hydrocarbons (PAHs) are recovered from a soil with a high carbon content (ca. 50%) with supercritical fluid extraction (SFE) as well as with conventional Soxhlet extraction. The influence of temperature and modifier volume on SFE efficiency and the effect of a combined liquid/solid trap for analyte collection are investigated in this study. Such traps, which make analyte collection and clean-up possible in one step, are compared with conventional analyte collection in pure organic solvents. A comparison between reproducibility and efficiency of SFE and Soxhlet extraction is presented.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240160810
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  • 3
    Electronic Resource
    Electronic Resource
    Aspects of the capillary GC analysis of all-trans- and 13-cis-acitretin (1992)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 15 (1992), S. 637-640 
    Details
    ISSN: 0935-6304
    Keywords: Capillary GC ; On-column injection ; Plasma samples ; Retinoid analysis ; Acitretin isomers ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The capillary gas chromatographic (CGC) analysis of the der-matological drug trans-acitretin (NeotigasonR) and its cis metabolite is described. Separation of the methyl ester derivatives can be achieved on a 90% biscyanopropylsiloxane phase. The importance of using cold on-column injection and short, thin film capillary columns is discussed. For patients treated with the prodrug of acitretin, etretinate (TigasonR), i.e. the ethyl ester of Neotigason, three compounds have to be separated. Selectivity tuning is required for successful CGC separation. An alternative can be found in the selectivity of ion monitoring mass spectroscopy. Analysis of plasma samples involves liquid-liquid extraction, a derivatization step, and HPLC purification.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240151003
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  • 4
    Electronic Resource
    Electronic Resource
    Plasma desorption mass spectrometry of phosphopeptides: An investigation to determine the feasibility of quantifying the degree of phosphorylation (1991)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 20 (1991), S. 565-574 
    Details
    ISSN: 1052-9306
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The intact ion yields of phosphotyrosine, phosphothreonine and mono- and diphosphoserine residue-containing peptides have been compared with the non-phosphorylated sequences using plasma desorption mass spectrometry. Equimolar mixtures of the phosphorylated (MP) and non-phosphorylated peptides (M) were also analysed. The positive mass spectra of these mixtures show a higher intensity of the [M + H]+ compared with the [MP + H]+. In the negative mass spectrum, the bias towards the [M - H]- compared with the [MP - H]- was reduced, but the spectra generally did not accurately reflect the stoichiometry.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bms.1200200910
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  • 5
    Electronic Resource
    Electronic Resource
    Die Chemische Dekorierung von Gleitlinien in Nickelkristallen durch Sulfidbildung (1965)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 338 (1965), S. 90-99 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Mechanical working of Ni crystals leads to surface deformations being typical for c. f. c. lattices. By interaction with H2S (formation of NiS), a chemical decoration of the gliding strips is possible which allows, by means of normal and electron microscope techniques, to study the mechanochemically activated surface areas of single- and polycrystalline Ni. Annealing after the mechanical working results first in a decrease of the chemical activity and then, at sufficiently high temperatures, in a complete loss of activity and chemical decoration.
    Notes: Bei der mechanischen Bearbeitung von Ni-Kristallen entstehen auf der Oberfläche die für kubisch-flächenzentrierte Kristalle typischen Deformationsstrukturen. Ausgehend von den Vorstellungen über erleichterte Keimbildungsbedingungen in Bereichen hoher Spannungskonzentration, in denen hohe Versetzungsdichten auftreten, lassen sich die entstehenden Gleitbänder durch H2S-Einwirkung unter Bildung von Nickelsulfid auf chemischem Wege dekorieren. Unter Anwendung mikroskopischer und elektronenmikroskopischer Methoden werden mit diesem Verfahren die bei der mechanischen Beanspruchung von Einkristallen und Polykristallen auftretenden Störbereiche nachgewiesen. Die Temperung der Kristalle nach Abschluß der mechanischen Bearbeitung führt zu einer Abnahme der Aktivität. Bei genügend hohen Temperaturen geht schließlich die selektive Reaktion an Gleitbändern vollständig verloren und führt zu einem Verlust des Dekorationseffektes.
    Additional Material: 16 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19653380115
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  • 6
    Electronic Resource
    Electronic Resource
    Über Uran-Nitrid-Chlorid, -Bromid und -Jodid (1969)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 366 (1969), S. 43-50 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The nitride-halides UNCl, UNBr and UNJ have been prepared by heating the tetrahalides in a current of ammonia, as well as by reaction of the tetrahalides with uranium nitride. The compounds have been characterized by analysis and their chemical and physical properties.The compounds are isotypic with BiOCl (EO1-type), they are, in addition, structurally related to the corresponding thorium compounds.
    Notes: Die Nitridhalogenide UNCl, UNBr und UNJ wurden durch Erhitzen der Tetrahalogenide im Ammoniakstrom, ferner durch Umsetzung der Tetrahalogenide mit Urannitrid hergestellt und durch Analyse sowie durch ihre chemischen und physikalischen Eigenschaften charakterisiert.Die Verbindungen sind dem BiOCl (EO1) isotyp, sie schließen sich strukturell den entsprechenden Thoriumverbindungen an.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19693660105
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  • 7
    Electronic Resource
    Electronic Resource
    Notiz über die Einwirkung von Ammoniak auf N-Acyl-isatine (1966)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 99 (1966), S. 3060-3062 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19660990942
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  • 8
    Electronic Resource
    Electronic Resource
    Über die Reaktionen der 6-Desoxy-D-gluco-hepturonsäure und der 6-Desoxy-D-gluco-heptodialdoseAus der Habilitationsschrift W. Meyer zu Reckendorf, Univ. Münster 1968 (1969)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 102 (1969), S. 2977-2986 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die 6-Desoxy-D-gluco-hepturonsäure lactonisiert nicht wie die D-Glucuronsäure. Versuche, ein 7.1-Lactam, 7.1-Thiolacton oder ein 7.3-Lacton darzustellen, verliefen negativ. Im letzteren Fall tritt eine Ausweichreaktion unter Bildung des 7.4-Lactons ein. In der Furanoseform ist die Bildung eines δ-Lactons möglich (20). Durch partielle Reduktion entsteht das Halbacetal 21, das bei der Hydrolyse neben der 6-Desoxy-D-gluco-heptodialdose 22 das 2.4.6-Trioxa-adamantan-Derivat 23 liefert.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19691020913
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  • 9
    Electronic Resource
    Electronic Resource
    Diaminozucker, X. Notiz über eine einfache Synthese der 2.3-Diamino-2.3-didesoxy-D-glucose (1969)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 102 (1969), S. 4207-4208 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19691021229
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  • 10
    Electronic Resource
    Electronic Resource
    Zur Darstellung von 1-Amino- und 4-Amino-phenanthren (1969)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 102 (1969), S. 2384-2391 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Bei der Semmler-Wolff-Aromatisierung der Oxime von 4-Oxo- (2) und 1-Oxo-1.2.3.4-tetrahydro-phenanthren (1) tritt eine Sauerstoff-Funktion in ortho-Stellung zur gebildeten Acetaminogruppe ein. Nach Behandlung der Reaktionsprodukte mit Alkali werden erhalten: 4-Acetamino-3-oxo-1.2.3.4-tetrahydro-phenanthren (4) bzw. 1-Acetamino-2-hydroxy-phenanthren (5) (neben 1-Acetamino-phenanthren).  -  Phenanthryl-(1)-amin kann aus 1 durch folgende Reaktionsreihe dargestellt werden: Bromierung mit Bromsuccinimid in Gegenwart von Benzoylperoxid, Umsetzung mit p-Nitro-phenylhydrazin, Hydrierung mit Raney-Nickel. Zwischenprodukt ist dabei das 1-[p-Nitro-benzolazo]-phenanthren (6), das auch aus dem p-Nitrophenylhydrazon von 1 durch Oxydation mit Mangandioxid oder durch Dehydrierung mit 2.7-Dinitro-phenanthren-chinon-(9.10) in p-Xylol erhältlich ist.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19691020726
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