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  • Articles  (6)
  • 01. Atmosphere::01.01. Atmosphere::01.01.07. Volcanic effects
  • kinetics
  • Springer  (6)
  • AGU
  • American Geophysical Union
  • Copernicus
  • INGV
  • Institute of Electrical and Electronics Engineers (IEEE)
  • 2000-2004
  • 1975-1979  (6)
  • 1977  (6)
Collection
  • Articles  (6)
Source
Keywords
Publisher
  • Springer  (6)
  • AGU
  • American Geophysical Union
  • Copernicus
  • INGV
    • +
Years
  • 2000-2004
  • 1975-1979  (6)
Year
Topic
  • 1
    Electronic Resource
    Electronic Resource
    The effects of aqueous solvent structure on the mutarotation kinetics of glucose (1977)
    Springer
    Journal of solution chemistry 6 (1977), S. 203-216 
    Details
    ISSN: 1572-8927
    Keywords: Glucose ; kinetics ; mixed solvent ; kinetic isotope effect ; enthalpy of activation ; entropy of activation ; tetrahydrofuran ; tert-butanol ; mutarotation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The mutarotation rates of glucose in aqueous mixtures of tetrahydrofuran andtert-butanol in the mole fraction (xi) range 0〈xi〈0.2 have been measured at 5° intervals in the range 5–35°C. The kinetic deuterium isotope effects have been determined for the same solvent compositions at 25 and 35°C. A statistical analysis of the Arrhenius plots indicates that the experimental errors, although small, are too large for the establishment of any compensation behavior between ΔH
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00646739
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  • 2
    Electronic Resource
    Electronic Resource
    The formation of a double oxide layer on pure copper (1977)
    Springer
    Oxidation of metals 11 (1977), S. 127-132 
    Details
    ISSN: 1573-4889
    Keywords: Duplex oxides ; copper oxidation ; kinetics ; oxygen partitioning
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The theory for the growth of a double oxide layer proposed by Yurek, Hirth, and Rapp, has been applied to copper using experimental rate-constant data obtained by Valensi. Calculated thicknesses of the layers agree very well with experimentally measured values.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00606399
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  • 3
    Electronic Resource
    Electronic Resource
    Oxidation of tantalum in oxygen-nitrogen and oxygen-inert gas mixtures (1977)
    Springer
    Oxidation of metals 11 (1977), S. 225-239 
    Details
    ISSN: 1573-4889
    Keywords: tantalum ; oxidation ; high temperature ; kinetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The oxidation of tantalum in oxygen-nitrogen and oxygen-inert gas mixtures at925°C has been studied. The oxygen pressure was close to 0.5 atm in all experiments, and partial pressures of the second component of from 0 to 180 Torr were employed. Spherical specimens were used to provide quantitatively significant kinetic data. A model has been proposed which suggests that the oxygen pressure at the reaction interface close to the metal surface is lower than the external pressure because of the finite permeability of the porous outer oxide layer, and that the inert gas effectively reduces the permeability. The model gives good quantitative agreement with the experimental results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00606059
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  • 4
    Electronic Resource
    Electronic Resource
    Oxidation of cobalt at high temperature (1977)
    Springer
    Oxidation of metals 11 (1977), S. 365-381 
    Details
    ISSN: 1573-4889
    Keywords: cobalt oxidation ; kinetics ; parabolic rate constant
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Precise values of parabolic rate constants of cobalt oxidation have been determined over a wide range of temperature (950–1300°C) and oxygen pressure (6.58× 10−4−0.658 atm). The dependence of the calculated values of parabolic rate constants k″p on oxygen pressure and temperature can be described by the following empirical equation: $$k''_p = const. \cdot {\text{p}}_{O_2 }^{{\text{1/n}}} \cdot exp ( - {\text{E}}_{\text{k}} /RT)$$ The exponent 1/n decreases with an increase in temperature from 1/3.40 at 950°C to 1/3.96 at 1300°C, whereas the activation energy Ek decreases with an increase in the oxygen pressure from 41.7 to 38.1 kcal/mole.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00608018
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  • 5
    Electronic Resource
    Electronic Resource
    Studies of the kinetics of nickel sulfidation in H2S-H2 mixtures in the temperature range 450–600°C (1977)
    Springer
    Oxidation of metals 11 (1977), S. 263-276 
    Details
    ISSN: 1573-4889
    Keywords: nickel ; sulfidation ; kinetics ; mechanism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The reaction between pure nickel and H2S-H2 mixtures containing 1–65% H2S has been studied over the temperature range 450–600°C. The sulfidation of nickel in the temperature range 560–600°C has been found to follow a linear rate law at low concentrations of H2S and a parabolic rate law at higher concentrations (10% and 65% H2S); X-ray examination of the scale formed on the metal showed it to be almost entirely β-Ni3S2. On the basis of the kinetics and marker studies it can be concluded that the sulfide scale on nickel is formed by the outward transport of the metal and the inward transport of sulfur. In the temperature range 450–500°C the sulfidation of nickel follows a parabolic rate law. In mixtures containing 10% H2S the scale formed contains voids, the occurrence of which is connected with formation of Ni7S6. It has also been shown that the rate of transport through the Ni3S2 layer has an essential influence on the formation of a continuous layer of Ni7S6. Marker studies have shown that both nickel and sulfur appear to be mobile in β′-Ni3S2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00606061
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  • 6
    Electronic Resource
    Electronic Resource
    Pharmacokinetics of propranolol in normal healthy volunteers (1977)
    Springer
    Journal of pharmacokinetics and pharmacodynamics 5 (1977), S. 183-192 
    Details
    ISSN: 1573-8744
    Keywords: propranolol ; kinetics ; volunteers ; bioavailability ; threshold dose
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The pharmacokinetics of propranolol in blood was studied in healthy volunteers, following intravenous administration of 0.1 mg/kg and increasing oral doses of 10,20, and 40 mg, using a specific and sensitive gas Chromatographie method. The systemic availability of orally administered propranolol varied from 9% to 38% between subjects, but it was constant within each subject. A linear relationship was found between the area under the blood concentration-time curve and the oral dose. At variance with literature data, we could not observe a threshold dose.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01065394
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