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  • 75.60  (3)
  • Gene isolation  (2)
  • Springer  (5)
  • 1
    Electronic Resource
    Electronic Resource
    Comparison between disaccommodation and ferromagnetic resonance measurements in polycrystalline nickel ferrites (1995)
    Springer
    Applied physics 60 (1995), S. 303-307 
    Details
    ISSN: 1432-0630
    Keywords: 76.50 ; 75.60
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract FerroMagnetic Resonance (FMR) measurements of polycrystalline nickel ferrites at 11 GHz from 77 to 400 K have been carried out. The different contributions to the FMR linewidth have been studied by a computational technique based on the parameters previously obtained for single-crystal nickel ferrite. A new qualitative comparison between the FMR and disac-commodation measurements by means of the induced anisotropy formalism is presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01538408
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  • 2
    Electronic Resource
    Electronic Resource
    Isolation of the DNA sequence coding indole-3-glycerol phosphate synthetase and Phosphoribosylanthranilate isomerase of Schizophyllum commune (1986)
    Springer
    Current genetics 10 (1986), S. 909-913 
    Details
    ISSN: 1432-0983
    Keywords: E. coli trpC ; Schizophyllum TRP1 ; Complementation ; Gene isolation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary A Schizophyllum gene library was made in plasmid pRK9, Plasmids from this library were tested for their ability to complement several auxotrophic mutations of Escherichia coli. The goal was to isolate a Schizophyllum auxotrophic gene that could be used to transform a corresponding Schizophyllum auxotrophic mutant to prototrophy. Complementation was observed only for E. coli trpC indole 3-glycerol phosphate synthetase (IGPS) and phosphoribosyl-anthranilate isomerase (PRAI) mutations. Plasmids with a Schizophyllum sequence coding for both IGPS and PRAI activities were recovered from E. coli transformants. Expression of the Schizophyllum gene (TRP1) in E. coli is probably dependent on the Serratia marcescens promoter of plasmid pRK9. The DNA sequence containing the Schizophyllum TRP1 gene was not obviously rearranged in cloning.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00398288
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  • 3
    Electronic Resource
    Electronic Resource
    The isolation of specific genes from the basidiomycete Schizophyllum commune (1987)
    Springer
    Current genetics 12 (1987), S. 547-554 
    Details
    ISSN: 1432-0983
    Keywords: Schizophyllum commune ; Transformation ; Gene isolation ; Basidiomycetes ; Recombinant DNA
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary We have developed a routine way to isolate genes directly from the basidiomycete fungus, Schizophyllum commune. Plasmid DNA from a genomic gene library was used to isolate five specific genes by complementation of Schizophyllum mutations via transformation. The mutant strains were deficient in the ability to synthesize either adenine (ade2 and ade5), uracil (ural, encoding orotidine-5′-phosphate decarboxylase; OMPdecase), tryptophan (rpl, encoding indole-3-glycerol phosphate synthetase; IGPS) or para aminobenzoic acid (pab1). In each case, Southern analysis revealed that transformation to prototrophy was concomitant with the integration of vector sequence into the genome of the S. commune mutant. Total DNA from transformants was restricted, religated, and used to transform E. coli. Ampicillin resistant plasmids were recovered from E. coli and tested for their ability to transform the corresponding mutant of S. commune. Plasmids complementing the ade2, adeS, pabl, trpl, and ural mutations were recovered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00419565
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  • 4
    Electronic Resource
    Electronic Resource
    Magnetic disaccommodation in normal spinel structures (1991)
    Springer
    Applied physics 52 (1991), S. 242-246 
    Details
    ISSN: 1432-0630
    Keywords: 75.60 ; 76
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Magnetic disaccommodation is investigated for ferrous ferrites with normal spinel structure. This study shows the presence of a new relaxation process in the temperature region IV (≃285 K) that has not been detected in inverse spinels. A numerical analysis of the isochronal spectra reveals that it is composed of two simple Debye processes with activation energies close to 0.75 eV and 0.80 eV, and preexponential factors 3×10−13 s. This relaxation is attributed to the formation of an induced anisotropy due to jumps of B-Fe ions into vacancies (as process III), but in presence of a divalent cation occupying an A-site.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00324585
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  • 5
    Electronic Resource
    Electronic Resource
    Micromagnetic model of the Richter-type relaxation in vacancy-doped Fe3O4 (1986)
    Springer
    Applied physics 39 (1986), S. 287-289 
    Details
    ISSN: 1432-0630
    Keywords: 75.60 ; 76
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Isothermal disaccommodation curves in vacancy-doped magnetite at room temperature show a typical Richter-type behaviour. Magnetic susceptibility decreases asymptotically according to a relaxation time of about 102 s, which is analyzed in terms of a progressive stabilization of the domains walls. The relaxation strength, vacancies and the restoring pressure on the Bloch walls are closely related.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00617274
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