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  • 1
    Electronic Resource
    Electronic Resource
    Decomposition of Calcium Cyanamide on Storage. (1924)
    s.l. : American Chemical Society
    Industrial & engineering chemistry 16 (1924), S. 684-688 
    Details
    ISSN: 1520-5045
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ie50175a010
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  • 2
    Electronic Resource
    Electronic Resource
    Thermal stresses in subducting lithosphere can explain double seismic zones (1982)
    [s.l.] : Nature Publishing Group
    Nature 295 (1982), S. 587-589 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The best studied double seismic zone is that beneath Northeast Honshu, Japan (Fig. 1). Note that the double zone of seismicity occurs in a portion of the downgoing plate that appears to be straight. We sought to evaluate whether the thermal stresses that result from the warming of the plate as it ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/295587a0
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  • 3
    Electronic Resource
    Electronic Resource
    Sulphur potential measurements with a two-phase sulphideoxide electrolyte (1983)
    Springer
    Journal of applied electrochemistry 13 (1983), S. 55-67 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract The open circuit potentials of the galvanic cell,Pt (or Au)¦(Ar + H2S + H2)′∥CaS + ZrO2(CaO)∥ (Ar + H2S+ H2)″£t (or Au) has been measured in the temperature range 1000 to 1660 K and PH2S:PH 2 ratios from 1.73×10−5 to 2.65×10−1. The solid electrolyte consists of a dispersion of calcium sulphide in a matrix of calcia-stabilized zirconia. The surface of the electrolyte is coated with a thin layer of calcium sulphide to prevent the formation of water vapour by reaction of hydrogen sulphide with calcium oxide or zirconia present in the electrolyte. The use of a ‘point electrode’ with a catalytically active tip was necessary to obtain steady emfs. At low temperatures and high sulphur potentials the emfs agreed with the Nernst equation. Deviations were observed at high temperatures and low sulphur potentials, probably due to the onset of significant electronic conduction in the oxide matrix of the electrolyte. The values of oxygen and sulphur potentials at which the electronic conductivity is equal to ionic conductivity in the two-phase electrolyte have been evaluated from the emf response of the cell. The sulphide-oxide electrolyte is unsuitable for sulphur potential measurements in atmospheres with high oxygen potentials, where oxidation of calcium sulphide may be expected.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00615887
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  • 4
    Electronic Resource
    Electronic Resource
    Decomposition of β-alumina in an oxygen potential gradient (1983)
    Springer
    Journal of applied electrochemistry 13 (1983), S. 469-472 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Single phase sodiumβ-alumina solid electrolyte was found to undergo isothermal phase separation in electrochemical cells, where a large oxygen potential gradient was imposed across the electrolyte and electrodes, not reversible to sodium ions, were short circuited. The experimental conditions and evidence of decomposition are outlined and a thermodynamic explanation for the phenomenon is given. This finding may lead to new methods for making multi-layered ceramic materials involving ionic conductors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00617521
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  • 5
    Electronic Resource
    Electronic Resource
    Phase relationships in the system Cr-W-O and thermodynamic properties of CrWO4 and Cr2WO6 (1980)
    Springer
    Journal of materials science 15 (1980), S. 2167-2174 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The phase diagram of the Cr-W-O system at 1000° C was established by metallographic and X-ray identification of the phases present after equilibration in evacuated silica capsules. Two ternary oxide phases, CrWO4 and Cr2WO6 were detected. The oxygen potential over the three-phase mixtures, W+Cr2O3 s+CrWO4, WO2.90+CrWO4+Cr2WO6 and Cr2O3+CrWO4+Cr2WO6, were measured by solid state cells incorporating Y2O3 stabilized ZrO2 electrolyte and Ni+NiO reference electrode. The Gibbs' energies of formation of the two ternary phases can be represented by the following equations $$\begin{gathered} W(s) + \tfrac{1}{2} Cr_2 O_3 (s) + \tfrac{5}{4} O_2 (g) \to CrWO_4 (s) \hfill \\ \Delta G^0 = - 172 047 + 48.725T ( \pm 230) cal mol^{ - 1} \hfill \\ Cr_2 O_3 (s) + WO_3 (s) \to Cr_2 WO_6 (s) \hfill \\ \Delta G^0 = - 3 835 + 0.235{\rm T} ( \pm 500) cal mol^{ - 1} \hfill \\ \end{gathered}$$
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00552303
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  • 6
    Electronic Resource
    Electronic Resource
    Quantitation of aniline in water, urine and serum by isotopic dilution mass fragmentography (1982)
    Springer
    Chromatographia 16 (1982), S. 188-189 
    Details
    ISSN: 1612-1112
    Keywords: Aniline ; Dimethylthiophosphinyl derivatives ; Mass fragmentography ; Environmental analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A method for trace analysis of aniline in water, urine and serum samples is presented. Internal standardisation with d5-aniline, extraction, derivatisation with dimethylthiophosphinic chloride, gas chromatographic separation on a glass capillary column and mass fragmentographic quantitation are essential steps of the analytical procedure. A detection limit of 20 pg/ml in water and 500 pg/ml in urine or serum is achieved.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02258896
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  • 7
    Electronic Resource
    Electronic Resource
    Ion-pair-reversed-phase high-performance liquid chromatographic determination of porphyrins from red blood cells (1982)
    Springer
    Chromatographia 16 (1982), S. 190-191 
    Details
    ISSN: 1612-1112
    Keywords: Ion-pair reversed-phase HPLC ; Protoporphyrin ; Zinc protoporphyrin ; Red blood cells ; Porphyria
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary An extraction and ion-pair reversed-phase HPLC procedure is described for the separation and determination of protoporphyrin and its zinc chelate from red blood cells. The recoveries were greater than 90% with coefficients of variation between 8 and 10%. A linear response curve was obtained from 800 to 4000 μg/l erythrocytes for the porphyrins.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02258897
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  • 8
    Electronic Resource
    Electronic Resource
    Selected ion monitoring determination of mono- and bifunctional amines by using phosphorus-containing derivativesPresented in parts at the 17th International Symposium on ‘Advances in Chromatography’, Las Vegas, Nevada, USA (1982). (1983)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 10 (1983), S. 175-182 
    Details
    ISSN: 0306-042X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Numerous monofunctional amines have been reacted with dimethylthiophosphinic chloride to form stable derivatives. Their good gas chromatographic properties and abundant molecular ions afforded highly sensitive and specific detection by selected ion monitoring (SIM) down to the picogram level. Based upon this derivatization procedure, new methods for the determination of aniline in serum and urine by SIM were developed. The minimum detectable concentration of aniline was 500 pg ml-1. Linear response curves were obtained from 1.5 to 150 ng ml-1 using (2H5)aniline as the internal standard. Specific derivatization of a series of bifunctional amines was achieved with methyldichlorophosphine and sulfur resulting in the formation of stable phospholidine-thiones. These derivatives chromatograph well on nonpolar stationary phases, and their mass spectra exhibit abundant molecular ions. This derivatization reaction was applied to the quantification of ephedrine from urine and serum by SIM with (2H2)ephedrine as the internal standard. The detection limit of the method was 1 ng ml-1. The linearity was established in the range from 10 to 160 ng ml-1.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bms.1200100312
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  • 9
    Electronic Resource
    Electronic Resource
    Beiträge zur Chemie der Alkylverbindungen von Übergangsmetallen. XXXVII. Zur Existenz von 1-Norbornylverbindungen des Wolframs und Molybdäns (1984)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 508 (1984), S. 50-54 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Chemistry of Transition Metal Alkyl Compounds. XXXVII. About the Existence of 1-Norbornyl Compounds of Tungsten and MolybdenumReactions of WCl6, WCl4, WO2Cl2, WOCl4, MoCl5, and MoO2(acac)2 with 1-Norbornyl lithium (1-NorLi1)) are described. From WCl6 and WCl4 [(1-Nor)2W]n is formed, whereas in dependence of the solvent WO2Cl2 and WOCl4 are transformed into the complexes Li2[1-NorWOCl4] · THF, Li[WOCl4], Li[WO2Cl2], and Li2[WO2Cl2]. MoCl5 and MoO2(acac)2 are reduced with formation of Li[MoCl5], Li[MoO2(acac)2] and Li2[MoO2(acac)2].  -  Stable (1-Nor)4M-derivatives of molybdenum and tungsten, comparable those of 3d-metals (M = Ti—Co) seem not to exist.
    Notes: Es wird über Reaktionen von WCl6, WCl4, WO2Cl2, WOCl4, MoCl5 und MoO2(acac)2) mit 1-Norbornyllithium (1-NorLi1)) berichtet. Ausgehend von WCl6 und WCl4 wird [(1-Nor)2W]n gebildet, während WO2Cl2 und WOCl4 je nach Lösungsmittel Komplexe der Formeln Li2[1-NorWOCl4] · THF, Li[WOCl4], Li[WO2Cl2] und Li2[WO2Cl2] ergeben. MoCl5 und MoO2(acac)2 werden zu Li[MoCl5], Li[MoO2(acac)2] und Li2[MoO2(acac)2] reduziert. - Den stabilen (1-Nor)4M-Derivaten der 3d-Metalle (M = Ti—Co) vergleichbare Verbindungen des Molybdäns und Wolframs scheinen nicht zu existieren.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19845080108
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  • 10
    Electronic Resource
    Electronic Resource
    Fabrication of birefringent anisotropic model materials (1982)
    Springer
    Experimental mechanics 22 (1982), S. 196-196 
    Details
    ISSN: 1741-2765
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02327405
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