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  • 1970-1974  (10)
  • 1972  (10)
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  • 1970-1974  (10)
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  • 1
    Electronic Resource
    Electronic Resource
    Ion-exchange, coordination, and adsorption chromatographic separation of heavy-end petroleum distillates (1972)
    s.l. : American Chemical Society
    Analytical chemistry 44 (1972), S. 1391-1395 
    Details
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac60316a003
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Stable isotope ratio variations in non-scleractinian coelenterate carbonates as a function of temperature (1972)
    Springer
    Marine biology 15 (1972), S. 293-297 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Some coelenterates of the class Hydrozoa and some anthozoan coelenterates from the subclass Octocorallia secrete skeletons of calcium carbonate. Skeletal carbonates of three hydrozoans and of two octocorals were analyzed for the stable isotopes of carbon and oxygen. The results suggest that each of these coelenterates deposits CaCO3 in oxygen isotopic equilibrium with seawater, and that at least one octocoral, Heliopora, has skeletal carbon in apparent isotopic equilibrium with atmospheric CO2. Two of these coelenterates, Millepora and Helipora, are significant contributors to the construction of coral reefs. Whereas δ18O of these corals is temperature dependent, δ13C is not obviously related to temperature. The δ18O-temperature relationship is not significantly different from the oxygen isotope paleotemperature scale developed by Epstein et al. (1953). These findings contrast with numerous analyses of the carbonate in scleractinian coelenterates, which have long been reported to deposit CaCO3 skeletons whose carbon and oxygen isotopic compositions are not in equilibrium with the external sea-water environment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00401388
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Murphree Point Efficiencies in Multicomponent Systems (1972)
    s.l. : American Chemical Society
    Industrial and engineering chemistry 11 (1972), S. 440-446 
    Details
    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/i260043a019
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Product Sequences in Liquid-Phase Oxidation of Paraffins (1972)
    s.l. : American Chemical Society
    Industrial and engineering chemistry 11 (1972), S. 59-68 
    Details
    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/i260041a012
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Computer Analyses of Gravitational Radiation Detector Coincidences (1972)
    [s.l.] : Nature Publishing Group
    Nature 240 (1972), S. 28-30 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] For all experiments reported here the only coincidences which were recorded were those which occurred within a predetermined time A/. Coincidences may be due to excitation of both detectors by a common source or to chance. It is customary to compute the chance (accidental) coincidence rate by ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/240028a0
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Stability of rigid solids embedded in an elastic medium (1972)
    Springer
    Archive for rational mechanics and analysis 48 (1972), S. 205-212 
    Details
    ISSN: 1432-0673
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Notes: Abstract The stability of a two-dimensional continuum consisting of rigid solids embedded in an elastic homogeneous medium with a fixed boundary is investigated. With each solid is associated the scalar $$\sigma = \frac{1}{S}\sum\limits_\alpha {\vec F_\alpha } \user1{ }.\user1{ }\overrightarrow {0M} _\alpha$$ where $$\vec F_\alpha$$ are balanced dead loads acting at points M α of the solid, and where S is the area of the surface of the solid. If μ is the shear modulus of the elastic medium, it is shown that (i) the inequality σ+4μ〉0, when it applies to each solid, is a sufficient condition for stability of the continuum; (ii) the inequality σ+4μ≧0 is a necessary condition for stability of a single circular solid embedded in an infinite elastic medium.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00256054
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  • 7
    Electronic Resource
    Electronic Resource
    Zeemanaufspaltung bei der Superstrahlung in Neon bei λ=6143Å (1972)
    Springer
    The European physical journal 252 (1972), S. 428-434 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Zusammenfassung Das Spektrum eines gepulsten Neon-Superstrahlers bei λ=6143 Å wurde mit einem Fabry-Perot-Interferometer untersucht. Die Fabry-Perot-Aufnahmen zeigten eine Aufspaltung der Superstrahlungslinie in mehrere Komponenten, bei hohen Entladungsstromstärken im Laser bis zu 6 Linien. Diese Komponenten wurden durch eine Aufspaltung der Laserniveaus durch Zeeman-Effekt infolge des Eigenmagnetfeldes des Entladungsstromes erklärt und berechnet. Es zeigt sich befriedigende Übereinstimmung zwischen experimentellen und theoretischen Ergebnissen.
    Notes: Abstract The spectrum of neon superradiance at λ=6143 Å is calculated with regard to the Zeemansplitting induced by the magnetic field of the excitation pulse. Good agreement was found between experimental and theoretical results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01379736
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Advances in gravitational radiation detection (1972)
    Springer
    General relativity and gravitation 3 (1972), S. 59-62 
    Details
    ISSN: 1572-9532
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract New experiments are reported which improve our estimates of the bandwidth and energy flux of the observed radiation. These include search for coincident, sudden increases in power of newly instrumented detectors at 1661 Hertz and 1581 Hertz, at opposite ends of a 1000 kilometer baseline, and search for coincidences between outputs of detectors at 1661 Hertz and 5000 Hertz. Coincidences are observed for the detectors separated by 80 Hertz, implying a radiation bandwidth exceeding 80 Hertz. The new instrumentation is a modification of the earlier technique for bonding ferroelectric crystals to aluminium cylinders. Three detectors are fully operational with sensitivity one order better than earlier ones. Progress has been made in data retrieval employing a computer and magnetic tape. Earlier results on the coincidence rates and time delay experiments have been confirmed. A 1661 Hertz detector has been developed for operation at liquid helium temperatures. It is now undergoing tests at the Argonne National Laboratory. An experiment has been approved by NASA to employ the moon as a gravitational radiation detector. Equipment has been designed by Bendix and the University of Maryland for emplacement by the Apollo 17 astronauts.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00755922
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  • 9
    Electronic Resource
    Electronic Resource
    Beitrag zur Interpretation von Stromdichte-Nebenmaxima in potentiodynamischen Polarisationskurven von Chromstählen (1972)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 23 (1972), S. 112-117 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Contribution to the interpretation of secondary current density maxima in potentiodynamic polarization curves of chromium steelsDetailed investigations into the behaviour of veraious chromium steels in sulfuric acid show, that the secondary current density peak in the potentiodynamic polarization curve at + 300 mVH is mainly due to hydrogen oxidation, and not to the dissolution of enriched nickel. The authors discuss the justification of such investigations which do not enable any conclusion with reference to the corrosion under stationary conditions.
    Notes: Eingehende Untersuchungen an verschiedenen Chromstählen in H2SO4 zeigen, daß das in der Literatur mehrfach beschriebene Nebenmaximum der Strom dichte in potentiodynamisch aufgenommenen Polarisationskurven bei + 300 m VH hauptsächlich durch Wasserstoff-oxydation und nicht durch die Auflösung von angereichertem Nickel verursacht wird, Die Berechtigung solcher Untersuchungen, die keine Aussagen über die Korrosion im stationären Zustand erlauben, wird kurz diskutiert.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19720230208
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    Paper (German National Licenses)
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  • 10
    Electronic Resource
    Electronic Resource
    Photochemie in der Vitamin D-Reihe. I. Kinetik und Quantenausbeuten der Ergosterinbestrahlung bei λ = 253,7 nm (1972)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 55 (1972), S. 921-937 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Irradiation of Δ5,7-9α, 10β-steroids in solution with λ = 253,7 nm yielded no Δ5,7-9β, 10α-steroids and vice versa. No back reaction from precalciferol2 to ergosterol could be detected by kinetic measurements. This leads to the conclusion that with the mercury resonance line only ring opening and 6,7-cis/trans isomerization but no ring closure occurs.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19720550319
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