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  • 1
    Electronic Resource
    Electronic Resource
    Characterization of DTPA complexes and conjugated antibodies of astatine (1989)
    Springer
    Journal of radioanalytical and nuclear chemistry 137 (1989), S. 365-372 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The complex formation of astatine/I/ cation with diethylene triamine pentaacetic acid /DTPA/ and characterization of the complexes were investigated by electromigration in free electrolytes and by gel-chromatography on Sephadex G 25. We describe the conjugation procedure for the production of At-DTPA conjugated polyclonal antibodies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02162464
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  • 2
    Electronic Resource
    Electronic Resource
    Comparison of superconducting and electronic properties of σ-and A-15 phase Nb−Al (1977)
    Springer
    Applied physics 13 (1977), S. 123-129 
    Details
    ISSN: 1432-0630
    Keywords: 74
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract For both, the σ-phase and the A-15 phase structure of Nb−Al binary alloys the superconducting properties were investigated in connection with measurements of normal state electronic properties like resistance and NMR-frequency and line width. The A-15 phase shows a transition temperature ofT c ≈17.5 K. The σ-phase shows only weak transitions at the same temperature which can be explained by A-15 inclusions in a non-superconducting σ-matrix. The Al27-Knight shift at room temperature is reduced from 0.162% for pure Al to (0.024±0.002)% and (0.026±0.0025)% for the A-15 and the σ-phase, respectively. The corresponding temperature coefficients differ in sign: positive for the A-15 and negative for the σ-phase; this may have a relation to the different superconducting properties. The NMR line width and the resistance show no different behaviour for the two phases. In general, the electronic properties seems to be less important for the occurance of superconductivity in the Nb−Al system than the lattice structures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00882469
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  • 3
    Electronic Resource
    Electronic Resource
    Superconductivity of A15-and σ-phase of Nb-Ir (1979)
    Springer
    Applied physics 19 (1979), S. 231-235 
    Details
    ISSN: 1432-0630
    Keywords: 74
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The superconducting properties of A15-, σ-, and tetragonal phases of the system Nb−Ir were investigated. The alloys were prepared by sintering and arc melting. They were subjected to optical and scanning electron microscopy. The lattice parameters were determined by x-ray diffraction technique. Superconducting transition temperatures,T c , as well as upper critical fields,H c2, were measured inductively and resistively. TheT c -values of the σ-phase vary between 2.15 and 2.40 K whereas for the A15-phase they vary between 1.83 and 2.73 K. TheT c -value of the tetragonal phase is 3.81 K. The upper critical fields of the tetragonal and the A 15-phase are nearly the same (≈13 kG) and lower compared with that of the σ-phase (≈18 kG). Several theoretically predicted values ofH c2(0) are evaluated and compared with the experimental ones.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00932403
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  • 4
    Electronic Resource
    Electronic Resource
    Einfluß der Ladungs- und Spindichteoszillationen auf das63Cu-Kernresonanzsignal in CuFe (1975)
    Springer
    Applied physics 6 (1975), S. 55-60 
    Details
    ISSN: 1432-0630
    Keywords: Cw NMR ; Dilute alloys
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Results of cw63Cu NMR measurements in dilute CuFe alloys containing from 0.01 up to 0.2 at.-% Fe are presented. The temperature was well above the Kondo temperature of this specimen. The broadening of the NMR line width is caused by the localized magnetic moment of the Fe impurities. The decreasing signal amplitude with increasing iron content is due to the quadrupolar interactions appearing simultaneously. The line broadening correspond strongly to that of the impurity susceptibility behaviour in CuFe. The quadrupolar disturbances are temperature independent. The influence of the simultaneously appearing magnetic and electric interactions on the spin lattice nuclear relaxation time is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00883549
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  • 5
    Electronic Resource
    Electronic Resource
    Comparison of superconducting parameters of A 15- and σ-phases of Nb−Pt (1978)
    Springer
    Applied physics 15 (1978), S. 307-313 
    Details
    ISSN: 1432-0630
    Keywords: 74
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The superconducting properties of A 15- and σ-phases of the system Nb−Pt were investigated. Alloys of compositions Nb3Pt, Nb2Pt, and Nb62Pt38 were prepared by arc melting and subjected to optical microscopic and x-ray analysis for structure determination. The transition temperatures were measured inductively as well as resistively. The temperature dependences of critical fields were measured up to 35 kG. The A 15-phase has aT c value of 8.97K and a zero temperature upper critical fieldH c2(0) of 100 kG as compared to aT c value of 2.14K and anH c2(0) value of 14kG for the σ-phase. A comparison with theoretical upper critical field values seems to indicate that a spin-orbit coupling mechanism is responsible for the higher value ofH c2(0) in the case of the A 15-phase alloy. The temperature dependent resistance up to 300 K is also measured and discussed for both the phases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00896113
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  • 6
    Electronic Resource
    Electronic Resource
    Investigation of the nuclear indirect interaction by NMR line shape analysis of single crystal molybdenum (1977)
    Springer
    Hyperfine interactions 5 (1977), S. 179-184 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract NMR signals of95Mo and97Mo were determined on single crystals of molybdenum. Their absorptive parts were analysed providing information about the indirect spin-spin interaction in spite of the quadrupole interaction. For the indirect exchange interaction the analysis yields |A ij |=100Hz±5%. An estimation of the upper limit of the indirect dipole-dipole interaction leads to |B ij |〈15 Hz.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01021689
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    Paper (German National Licenses)
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