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  • 1
    Monograph available for loan
    Monograph available for loan
    Chemistry and physics of fogwater collection : Workshop, Frankfurt am main, 16./17. Dec. 1986, and final report of research project ; Contract 07045796 (1988)
    München
    Associated volumes
    Details Availability
    Call number: MOP 47609 / Mitte
    In: BPT-Bericht
    Type of Medium: Monograph available for loan
    Pages: V, 158 S.
    Series Statement: BPT-Bericht 1988, 6
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 2
    Electronic Resource
    Electronic Resource
    Determination of the interaction second virial coefficients for the carbon dioxide-ethane system from refractive index measurements (1987)
    Springer
    International journal of thermophysics 8 (1987), S. 81-95 
    Details
    ISSN: 1572-9567
    Keywords: carbon dioxide ; ethane ; Lorentz-Lorenz law ; mixtures ; refraction virial coefficient ; interaction second virial coefficient ; compressibility factor
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The compressibility behavior of the CO2-C2H6 system was investigated experimentally. In this work, the refractive indexes of the pure gases and the mixtures were measured using an optical apparatus. On the basis of these data, density and compressibility factors were computed using the Lorentz-Lorenz law. For the pure components, carbon dioxide and ethane, the data from the optical system were slightly adjusted by a fit to Burnett apparatus data measured separately. The experiments produced very accurate virial coefficients and refraction virial coefficients. This paper reports on the effect of temperature on the second and third virial coefficients. For the first refraction virial coefficient, no influence of temperature was found with the equipment used. The interaction second virial coefficient B 12 (as a function of temperature) was computed from experimental data for the CO2-C2H6 binary system. The data, for which an accuracy of ±1.5 cm3 · mol−1 was estimated, are in agreement with the data published by Holste et al.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00503226
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  • 3
    Electronic Resource
    Electronic Resource
    Direct determination of the second refractivity virial coefficient of methane, nitrogen, and five of their mixtures (1986)
    Springer
    International journal of thermophysics 7 (1986), S. 357-366 
    Details
    ISSN: 1572-9567
    Keywords: expansion technique ; Lorentz-Lorenz function ; mixed interaction ; refractive index ; refractivity virial coefficient
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The experimental technique for the direct determination of the second refractivity virial coefficient is described. The absolute measurement of the refractive index n combined with an expansion technique for obtaining the higher-order coefficients of the Lorentz-Lorenz expansion $${\text{LL = [(}}n^2 - 1)/(n^2 + 2)]{\text{ }}\rho ^{ - 1} {\text{ = }}A_n {\text{ }} + {\text{ }}B_n \rho {\text{ }} + {\text{ }}C_n \rho ^2 {\text{ + }} \cdot \cdot \cdot $$ leads to precise values of density ρ. A nis the ideal molar refractivity, which is readily determined from the absolute measurements of n in terms of pressure, whereas B n, C n,... are the higher-order molar refractivity virial coefficients, which are obtained from expansion experiments. The expansion method consists in measuring the sum of optical path lengths of two similar cells: one of them is filled with the gas at density ρ, and the other is evacuated. After the expansion the density is nearly halved and one measures again the optical path lengths. In order to cancel the small differences in volume and path lengths between the two cells, the process is reversed. Because the linear term in density remains the same before and after the expansion and only the quadratic and higher-order terms change, we can determine the refractivity virial coefficients B n, C n,... from the change in the optical path lengths. The measurements for the determination of B nand C nfor methane, nitrogen, and five mixtures were carried out at 323.15 K and pressures up to 450 bar. The mixed-interaction constant for methane and nitrogen derived from the experimental second refractivity virial coefficient is compared with those obtained from the geometric and linear mixing rule as well as Lorentz combination.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00500161
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  • 4
    Electronic Resource
    Electronic Resource
    A comparison of the enzyme fluorometric and the peroxyoxalate chemiluminescence methods for measuring H2O2 (1987)
    Springer
    Journal of atmospheric chemistry 5 (1987), S. 311-322 
    Details
    ISSN: 1573-0662
    Keywords: Enzyme fluorometry ; peroxyoxalate chemiluminescence ; hydrogen peroxide analysis ; comparative study
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences
    Notes: Abstract During September 25 to October 28, 1985, the enzyme fluorometric (Lazrus et al., 1985) and the peroxyoxalate chemiluminescence (Klockow and Jacob, 1986; Jaeschke, 1986) techniques for analyzing H2O2 were compared in laboratory studies at the National Center for Atmospheric Research in Boulder, Colorado, U.S.A. and under field conditions at the Whiteface Mt. field station of the Atmospheric Sciences Research Center, Albany, New York, U.S.A. Both methods showed excellent agreement, with a maximum deviation of ±5%. Only at unusually high concentrations of some potential atmospheric species could slight interferences be observed. During the experiments the detection limits were 1.3×10-8 mol/l (0.44 ppbm) of H2O2 for the fluorometric instrument and 4×10-8 mol/l (1.36 ppbm) of H2O2 for the chemiluminescence instrument. For the chemiluminescence technique, the response to methylhydroperoxide was approximately 80-fold less than that to an equivalent concentration of H2O2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00114109
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  • 5
    Electronic Resource
    Electronic Resource
    The determination of the second and third virial coefficients frompVT-X data of binary systems (1988)
    Springer
    International journal of thermophysics 9 (1988), S. 985-992 
    Details
    ISSN: 1572-9567
    Keywords: compressibility ; data analysis ; mixtures ; virial coefficients
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The compressibility factor of multicomponent systems can be obtained in terms of virial coefficients of the pure components and their binary mixtures. This paper concerns a method with which, for that purpose, the second and third virial coefficients for these binaries have been determined from experimental data. From useful data, second and third virial coefficients are obtained as a quadratic function of the temperature. The density domain for which these results are applicable is discussed. When ample data are available, results for a sample mixture can be obtained in a straightforward manner. Nevertheless, it is shown that under much less favorable conditions—sometimes even when pure-component data are lacking—fairly good results can still be obtained. In that case, the choice for an appropriate combining rule has to be considered carefully. Finally, the involvement of ternary mixture data, both obtained experimentally and predicted by the equation, is considered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01133266
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  • 6
    Electronic Resource
    Electronic Resource
    Study of metal aerosol systems as a sink for atmospheric SO2 (1986)
    Springer
    Journal of atmospheric chemistry 4 (1986), S. 311-334 
    Details
    ISSN: 1573-0662
    Keywords: Sulfur dioxide ; removal ; aerosol ; transition metal ; hydrogen peroxide ; flow reactor
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences
    Notes: Abstract The chemical removal of SO2 in the presence of different aerosol systems has been investigated in laboratory experiments using a dynamic flow reactor. The aerosols consisted of wetted particles containing one of the following substances: MnCl2, Mn(NO3)2, MnSO4, CuCl2, Cu(NO3)2, CuSO4, FeCl3, NaCl. The SO2 removal rate R was measured as a function of the SO2 gas phase concentration (SO2)g, the spatial metal concentration CMe, and the relative humidity rH in the reactor. A first-order dependence with regard to (SO2)g was observed for each type of aerosol. For the Mn(II) and Cu(II) aerosols R was found to be a non-linear function of CMe except for MnSO4 and Cu(NO3)2 particles. The removal rate showed a significant increase with the relative humidity particularly when rH was close to the deliquescence point of the wetted particles. Among the Mn(II) and Cu(II) aerosols investigated Mn(NO3)2 was found to be most efficient for the chemical removal of SO2 at atmospheric background conditions, especially in haze and fog droplets. The results further indicate that the catalytic oxidation of S(IV) in such aerosol systems may be as efficient as its oxidation by H2O2 in cloud water.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00053807
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  • 7
    Electronic Resource
    Electronic Resource
    Synthesen von Pyrazolo-1,2,4-triazin-Derivaten des 1,6-Methano[10]annulens (1988)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 121 (1988), S. 1359-1361 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Syntheses of Pyrazolo-1,2,4-triazine Derivatives of 1,6-Methano [10] annuleneCoupling reactions of the diazonium betains 3, 4, 5 with 3-tert-butoxy-1,6-methano[10]annulene (2) under mild reaction conditions lead to elimination of tert-butyl alcohol with formation of the methano-bridged triazine dye stuffs 6a-c. For comparison by coupling reactions of 3-5 with β-naphthol followed by cyclisation reactions the triazine dye stuffs 8a-c are obtained. Their spectroscopic properties were compared with 6a-c.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19881210724
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  • 8
    Electronic Resource
    Electronic Resource
    Synthesen cyclischer und acyclischer 1,4-Chinonhydrazone mit Norcaradien- und Cycloheptatrien-Partialstruktur (1988)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 121 (1988), S. 1861-1863 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Syntheses of Cyclic and Acyclic 1,4-Quinone Hydrazones with Norcaradiene and Cycloheptatriene FragmentsThe syntheses of different triazine and azo dyestuffs 2a-c, 4a, b, 5a, b, and 6c are described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19881211027
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  • 9
    Electronic Resource
    Electronic Resource
    Eine genaue Korrelationsgleichung zur Berechnung der Gasdichte von Methan im Temperaturbereich von 0 bis 50 °C und Drücken bis 80 bar (1988)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 60 (1988), S. 120-122 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330600210
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  • 10
    Electronic Resource
    Electronic Resource
    Kupplung von 3-Diazo-3H-pyrazolen mit 2-Alkoxy-1,6-methano[10]annulenen und oxidative Cyclisierung zu PyrazolotriazinenProfessor Günther Wilke zum 60. Geburtstag gewidmetDiese Arbeit wurde von der Deutschen Forschungsgemeinschaft und vom Fonds der Chemischen Industrie unterstützt. (1985)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 97 (1985), S. 356-357 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19850970441
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