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  • Springer  (34)
  • American Physical Society  (15)
  • Oxford University Press
  • 2000-2004  (21)
  • 1975-1979  (29)
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Keywords
Publisher
Years
Year
  • 11
    Electronic Resource
    Electronic Resource
    Eine einfache Technik zur quantitativen Auswertung von Dünnschicht-Chromatogrammen (1976)
    Springer
    Chromatographia 9 (1976), S. 211-214 
    Details
    ISSN: 1612-1112
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Ein neues Verfahren wird beschrieben, das die quantitative Auswertung von Dünnschicht-Chromatogrammen erlaubt. Nach der auf DC-Fertigfolien durchgeführten Trennung werden die Zonen ausgeschnitten und die Substanzen mit einem neuen, unkomplizierten Gerät quantitativ aus dem Sorbens eluiert. In den Eluaten erfolgen die Bestimmungen mit den üblichen analytischen Methoden — vorzugsweise der Spektralphotometrie. An Hand von Beispielen wird die Genauigkeit der Folien-Elutions-Methode demonstriert.
    Notes: Summary A new method is described for the quantitative evaluation of thin-layer chromatograms. After the substances have been separated by TLC on precoated sheets the spots are cut out and the substances can be eluted from the adsorbent by a new simple apparatus with a suitable solvent. In the eluate the quantitative determination is done by means of the usual analytical methods, especially spectrophotometric measurements. Some examples illustrate the precision with which the sheet elution method can be carried out.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02276327
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  • 12
    Electronic Resource
    Electronic Resource
    Tetraaza[14]annulen-Derivate und ihre Vorstufen. 1. Mitt. Niedermolekulare Modellverbindungen (1978)
    Springer
    Colloid & polymer science 256 (1978), S. 90-90 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , 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/BF01746734
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  • 13
    Electronic Resource
    Electronic Resource
    Calculation of Magnetic Properties and Specific Heat for the Nuclear Enhanced Ferromagnet PrNi5 (2000)
    Springer
    Journal of low temperature physics 120 (2000), S. 401-434 
    Details
    ISSN: 1573-7357
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A general model hamiltonian for hyperfine enhanced magnetic materials is presented. The use of the model is not limited only to the nuclear regime, but the model treats also situations when the strength of the exchange interaction is close to and above the threshold value. The model is solved numerically for PrNi5 and the results are compared with recent ultra-low temperature experiments. In particular, the behavior of magnetization, susceptibility, and specific heat of PrNi5 is studied for two external field geometries and anisotropic properties are pointed out. The effect of the quadrupole interaction is examined in detail. The question of the correlations among interacting ions is also addressed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1004692821396
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  • 14
    Electronic Resource
    Electronic Resource
    Electron Spectroscopy of Single-Layer (n = 1) Bi2Sr2−xLaxCuO6+δ Crystals at Optimal Doping (2000)
    Springer
    Journal of superconductivity 13 (2000), S. 883-887 
    Details
    ISSN: 1572-9605
    Keywords: high-temperature superconductors ; angle-reserved photoemission ; x-ray absorption spectroscopy ; electronic structure ; cuprate superconductors
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract On single crystals of the single-layer (n = 1) high-T c superconductor Bi2Sr2−x La x CuO6+δ at optimal doping (x = 0.4), the electron spectroscopies x-ray absorption (XAS) and high-resolution angle-resolved photoemission (ARPES) were performed. The XAS gives the intensity of the so-called prepeak of the O 1s line what is due to the unoccupied part of the Zhang–Rice (ZR) singlet band. For ARPES, the advantages of single-layer material are the absence of bilayer effects and the possibility to study the electronic properties of the normal state at a sample temperature where the thermal broadening is extremely small (〈10 meV). The controlled variation of the polarization vector of the synchrotron radiation made it possible to resolve a distinct fine-structure of the occupied part of the ZR singlet band at the Fermi level. These observations have enormous consequences for line shape analyses and the determination of pseudogaps, and thus the mechanism of high-T c superconductivity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1026430432376
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  • 15
    Electronic Resource
    Electronic Resource
    Plant uptake of bicarbonate as measured with the11C isotope (1979)
    Springer
    Plant and soil 51 (1979), S. 431-435 
    Details
    ISSN: 1573-5036
    Keywords: Bicarbonate ; Bush beans ; 11C ; Cation-anion ; CO2 fixation ; Galenia ; Tracer ; Uptake
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary 11C which is cyclotron produced by14N(P, α)11C(half-life 20.1M) was use as a tracer of bicarbonate to determine its movements from a nutrient solution through roots to stems and leaves of bush bean plants (Phaseolus vulgaris L. var. Improved Tendergreen). The short time involved and the high solution pH minimized the need for use of the Hederson Hasselbach equation for activity correction. Quantities of11C did move into roots, stems and leaves with a sharp decreasing gradient (root/stem=14.5, stems/leaves=11.7) More11C moved into plants with KHCO3 than with NaHCO3. The (NH4)2SO4 enhanced11C uptake and KNO3 than with competition indicated possibility of some uptake of HCO 3 − . In an experiment withGalenia pubescens (Eckl. and Zeyh.) Druce, the11C was more readily moved to stems and leaves than in bush bean indicating substantial uptake of HCO 3 − .
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02197790
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  • 16
    Electronic Resource
    Electronic Resource
    Surface induced reactivity for titanium by ion implantation (2000)
    Springer
    Journal of materials science 11 (2000), S. 383-391 
    Details
    ISSN: 1573-4838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Technology
    Notes: Abstract Calcium and phosphorus storage in a thin layer of titanium surface was achieved by ion implantation. We study the reactivity of this surface in response to a hydrothermal treatment. The incipient implanted species are observed to convert to Ca2+ and PO4 3-, the precursors for generating calcium phosphate polymorphs. Hydroxyapatite is formed from these precursors by an interface-liquid mediated mineralization preceded by the hydrolysis of oxygen compounds of Ca and P from the solid phase. The morphology and organization of apatite mineral is controlled by the fluid dynamics reflecting the surface remodeling to adapt to the available local environment. Exposed to calcium and phosphate ion containing solution, the hydrothermally treated surface templates hydroxyapatite deposition. Ca and P implanted Ti surface was shown to be chemically and morphologically actively involved in the interfacial reactions. ©2000 Kluwer Academic Publishers
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008938125348
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  • 17
    Electronic Resource
    Electronic Resource
    Complete automatic analysis of photoelastic fringes (1979)
    Springer
    Experimental mechanics 19 (1979), S. 245-251 
    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
    Notes: Abstract TV technology combined with a modern video-frame store is used to store the complete fringe pattern in digitized form in real time. A minicomputer connected to the store has direct access to any picture point in the store. In this manner, it is possible to evaluate the photoelastic-fringe pattern in the computer by special developed software.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02328653
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  • 18
    Electronic Resource
    Electronic Resource
    Investigations on selected gallium doped lanthanum chromites as electrode materials for HC detection (2000)
    Springer
    Ionics 6 (2000), S. 359-363 
    Details
    ISSN: 1862-0760
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Perovskite-type mixed oxides with the formula La1−xGa0.3Cr0.7O3−δ (x=0.2; 0.1; 0.05; 0) were investigated in view of their usability as electrode materials in exhaust gas sensors for HC detection. The electrode materials were characterised regarding their structure, catalytic activity for propene oxidation and potentiometric behaviour in combustible gaseous mixtures. XRD-measurements indicate, that the solid oxide method does not permit lanthanum deficiencies x ≥ 0.05. The electrodes show non Nernstian behaviour.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02374153
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  • 19
    Electronic Resource
    Electronic Resource
    Tumour growth and differentiation in relation to the content of carcinoembryonic antigen in gastrointestinal neoplasia (1978)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 290 (1978), S. 137-138 
    Details
    ISSN: 1618-2650
    Keywords: Best. von Carcinoembryonalem Antigen in Carcinomen ; Radioimmunoassay
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00482298
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  • 20
    Electronic Resource
    Electronic Resource
    Direkte Kupplung von Steroiden an Eiweiß durch reduktive Aminierung zur Gewinnung spezifischer Antikörper (1978)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 290 (1978), S. 164-164 
    Details
    ISSN: 1618-2650
    Keywords: Gewinnung von Antikörpern ; Immunoassay ; Kupplg. von Steroiden an Eiweiß
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00482320
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