Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • 1970-1974  (8)
  • 1
    Electronic Resource
    Electronic Resource
    Iron and manganese encrustations in Recent sediments (1974)
    [s.l.] : Nature Publishing Group
    Nature 249 (1974), S. 436-437 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1 Location of cores, C. Cl, BM1973,0,l; C2, BM1973, 0,2; C3, BM1973,0,3; C17, BM1973,0,17. 1963,544 is a British Museum valve lead sample. Fig. 2 Sedimentology of the cores, a, Orange-yellow ooze; b, layer of black manganese-encrusted tubes in light brown ooze; c, layer of brown ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/249436a0
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Non-equilibrium Isotopic Fractionation between Seawater and Planktonic Foraminiferal Tests (1973)
    [s.l.] : Nature Publishing Group
    Nature 242 (1973), S. 177-179 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Planktonic foraminiferal tests are not formed in isotopic equilibrium with seawater; the deviation is species ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/242177a0
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    The influence of titanium on the e.s.r. behaviour of Cr3+ in alumina (1974)
    Springer
    Journal of materials science 9 (1974), S. 1499-1506 
    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 Electron spin resonance techniques have been used to study the effects of double doping alumina with chromium and titanium. Measurements were made as a function of polar angle on the peak-to-peak derivative linewidths of the three Cr3+ transitions at room temperature for a range of samples containing about 0.02% chromium and between zero and 0.024% titanium. Theoretical linewidth variations, calculated from Van Vleck's dipolar broadening theory, were compared with experiment. For crystals singly doped with Cr3+ the theory fitted well qualitatively but gave values too great by a factor of seven, in agreement with previous studies. On addition of titanium, marked changes were seen experimentally in the Cr3+ linewidth polar plots. These showed a pronounced minimum near θ=55° in complete contrast to the behaviour of singly doped (Cr/Al2O3) crystals. This has been attributed to the formation of (Cr-Ti) complexes by some of the titanium ions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00552936
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    The dielectric constants of current-blackened single crystral yttria-stabilized zirconia (1973)
    Springer
    Journal of materials science 8 (1973), S. 1401-1408 
    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 dielectric constants of 8 mol % single crystal yttria-stabilized zirconia have been measured, using both radio-frequency and microwave methods, before and after blackening by high temperature electrolysis. For as-grown material ε′ = 38±4 and tan δ = 0.004. After electrolysis both the dielectric constant and loss tangent of the current-blackened material increased; this experimental data has been compared with theoretical predictions for composite dielectrics. The dielectric behaviour in the current-blackened material was consistent with the formation of metallic particles; these initially appeared to be spherical but elongated as electrolysis proceeded.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00551662
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Dipolar line broadening in gadolinium-doped calcium tungstate (1974)
    Springer
    Journal of materials science 9 (1974), S. 1337-1343 
    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 Electron spin resonance linewidths of Gd7/2 in single crystal calcium tungstate (CaWO4) were examined experimentally and theoretically for Gd concentrations up to 0.05 at. %, the range over which single site occupation by gadolinium was maintained. The linewidths expressed as widths between points of maximum slope on derivative spectra, lay between 0.3 and 1.5 mT over the angular ranges 0° 〈 θ 〈 90° and 0 〈 φ 〈 90° explored. There is good agreement between the form of the angular variation of linewidth and calculation based on dipolar broadening theory. Quantitatively, however, the predicted values are about five time larger than the observed linewidths; this difference may be due to exchange narrowing.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00551853
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Optical absorption in current-blackened yttria-stabilized zirconia (1973)
    Springer
    Journal of materials science 8 (1973), S. 876-882 
    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 nature of the blackening caused by high-temperature electrolysis of 8 and 12 mol % yttria-stabilized zirconia single crystals has been investigated by studying the optical absorption between 260 and 700 nm. In the early stages the band edge remained at 271 nm, the crystal became red and the transmission showed a broad minimum centred at 480 nm; in the later stages the crystal became black and the transmission was reduced drastically over the whole visible range. The low transmission was shown, by integrating sphere measurements, to be due to absorbing centres. These were attributed to the formation of vacancy aggregates which ultimately produced colloidal metallic particles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02397918
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Optical absorption in current-blackened yttria-stabilized zirconia (1973)
    Springer
    Journal of materials science 8 (1973), S. 876-882 
    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 nature of the blackening caused by high-temperature electrolysis of 8 and 12 mol % yttria-stabilized zirconia single crystals has been investigated by studying the optical absorption between 260 and 700 nm. In the early stages the band edge remained at 271 nm, the crystal became red and the transmission showed a broad minimum centred at 480 nm; in the later stages the crystal became black and the transmission was reduced drastically over the whole visible range. The low transmission was shown, by integrating sphere measurements, to be due to absorbing centres. These were attributed to the formation of vacancy aggregates which ultimately produced colloidal metallic particles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00553739
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Spin-lattice relaxation of Gd7/2 in calcium tungstate (1974)
    Springer
    Journal of materials science 9 (1974), S. 864-865 
    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
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00761811
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...