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  • Artikel: DFG Deutsche Nationallizenzen  (15)
  • 1980-1984  (13)
  • 1960-1964  (2)
Datenquelle
  • Artikel: DFG Deutsche Nationallizenzen  (15)
Materialart
Erscheinungszeitraum
Jahr
Schlagwörter
  • 1
    Digitale Medien
    Digitale Medien
    Blood coagulation and fibrinolysis in experimental hypercholesterolemic rats (1961)
    Springer
    Naturwissenschaften 48 (1961), S. 623-624 
    Details
    ISSN: 1432-1904
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie , Allgemeine Naturwissenschaft
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00591208
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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    Artikel (Nationallizenzen)
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  • 2
    Digitale Medien
    Digitale Medien
    Enhanced frequency of chromosome aberrations in lymphocytes of male compared with female muntjacs after X-ray irradiation in vitro (1981)
    [s.l.] : Nature Publishing Group
    Nature 290 (1981), S. 604-607 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] We prepared lymphocyte cultures from healthy, young adult muntjacs (Muntiacus muntjak) selected from a small breeding colony which we maintained. The specimens were chosen so that we could do experiments on blood samples of three pairs of muntjacs of similar age and body weight. This barking deer ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/290604a0
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Regeneration of Prothrombin Activity by Plasma Albumin and Globulin Fractions (1962)
    [s.l.] : Nature Publishing Group
    Nature 195 (1962), S. 668-670 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] THE agents responsible for blood coagulation must be able to circulate freely in the blood and yet be able to form a clot at the site of injury to the body. Two agents of primary importance in the process of blood coagulation circulate in the blood as the proteins prothrombin and fibrinogen. ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/195668a0
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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    Artikel (Nationallizenzen)
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  • 4
    Digitale Medien
    Digitale Medien
    Reduced frequency of baseline sister chromatid exchanges in lymphocytes grown in antibiotics and serum-excluded culture medium (1983)
    Springer
    Human genetics 〈Berlin〉 64 (1983), S. 249-253 
    Details
    ISSN: 1432-1203
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary Peripheral venous blood from man, muntjac, and cattle were grown in medium (1) containing different serum (human AB+/FCS/autologous), (2) without serum or antibiotics (penicillin and streptomycin), or (3) without both serum and antibiotics to investigate to what extent certain essential culture components used in in vitro mammalian cell cultures affect the incidence of spontaneous sister chromatid exchanges (SCEs). The observation that exclusion of only serum from culture medium enhanced the frequency of SCEs whereas exclusion of both serum and antibiotics, which influence the cell cycle kinetics to a great extent, exhibited the lowest frequency of SCEs reported so far for lymphocyte cultures, indicates that the frequency of so-called spontaneous SCEs usually observed in normal lymphocyte cultures grown in medium supplemented with serum and antibiotics is in fact an elevated frequency.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00279403
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 5
    Digitale Medien
    Digitale Medien
    Infrared spectra of the ceramic LaCrO3 doped with strontium and titanium (1982)
    Springer
    Journal of materials science 1 (1982), S. 239-240 
    Details
    ISSN: 1573-4811
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00727844
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 6
    Digitale Medien
    Digitale Medien
    Pentavalent vanadium ion addition to Ni-Zn ferrites (1983)
    Springer
    Journal of materials science 18 (1983), S. 1934-1940 
    Details
    ISSN: 1573-4803
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Abstract The d.c. And a.c. Electrical conductivities of iron-excess and iron-deficient compositions of Ni-Zn ferrites, with varying V2O5, content sintered at different temperatures (1200 to 1300° C) for 2 h in air, has been studied. The electrical conductivity increased with a 0.2 mol % addition of V2O5. The minimum d.c. And a.c. Electrical conductivities were found at a V2O5 content of 0.4 mol % followed by a small increase for still higher concentrations of V2O5 (⩾ 0.6 to 1.0 mol %). The minima at 0.4 mol % were unaffected by the sintering temperature in both the iron-excess and iron-deficient cases. The activation energies for a.c. Conduction at 1 MHz were always less than the corresponding values for d.c. conduction. The results obtained can be explained in terms of solubility of V2O5, which creates ferrous ions and localizes Fe2+ ions by forming triplets in the ferrite matrix.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00554985
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 7
    Digitale Medien
    Digitale Medien
    On some transport properties of strontium-doped lanthanum chromite ceramics (1983)
    Springer
    Journal of materials science 18 (1983), S. 2095-2100 
    Details
    ISSN: 1573-4803
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Abstract D.C. Electrical conductivity, Hall mobility and magnetic susceptibility measurements on La1−x Sr x CrO3 (0⩽x⩽0.25) perovskite ceramic system, and their temperature dependence, have been carried out to understand the nature of the transport mechanism in them. The electrical conductivity and Hall mobility displayed thermally activated temperature dependence with activation energies that varied from 0.13 to 0.23 ev. The variation of the d.c. conductivity of the polycrystalline La1−x Sr x CrO3 with strontium content (X) has been found to be strongly affected by the changes in microstructure. Magnetic susceptibility data indicate that the electronic transport is due to the presence of Cr4+ ions in the lattice, and that the localized level of hopping is associated with the chromium 3d band.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00555003
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  • 8
    Digitale Medien
    Digitale Medien
    X-ray studies on the structure of noncrystalline SnTe films (1982)
    Springer
    Journal of materials science 1 (1982), S. 419-420 
    Details
    ISSN: 1573-4811
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00724858
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 9
    Digitale Medien
    Digitale Medien
    A study of the oxidation kinetics of CuFeO2 in the Cu-Fe-O system (1981)
    Springer
    Journal of materials science 16 (1981), S. 102-110 
    Details
    ISSN: 1573-4803
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Abstract The oxidation kinetics of CuFeO2 in the Cu-Fe-O system have been studied between 500 and 900° C in an atmosphere containing 1 vol% oxygen in a nitrogen stream using thermogravimetric analysis (TGA). It was found that addition of Fe2O3 to the CuFeO2 caused a decrease in the oxidation rate while addition of CuO caused an increase. On increasing the concentration of Fe2O3 the activation energy was found to increase from ~ 18 kcal mol−1 to ~ 45 kcal mol−1 and the exponent ‘n’ in Avrami's equationf=1-exp (−kt n) was also observed to increase, from 1.3 to 2.3. On adding CuO to the CuFeO2 in the Cu-Fe-O system the activation energy decreased from ~ 18 kcal mol−1 to ~ 8 kcal mol−1. The variation in both values indicates changes in the oxidation mechanisms. The microstructural changes associated with oxidation have been studied using optical microscopy. A model has been proposed to explain the results.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00552064
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  • 10
    Digitale Medien
    Digitale Medien
    Electrical conduction in titania-doped lanthanum chromite ceramics (1981)
    Springer
    Journal of materials science 16 (1981), S. 1994-1998 
    Details
    ISSN: 1573-4803
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Abstract The direct and alternating current electrical conductivities of lanthanum chromite ceramic doped with 1 to 3 wt% TiO2 have been measured at temperatures from 20 to 200° C. The sample containing 3 wt% TiO2 has been studied in detail because of all the samples it showed the highest sintered density and electrical conductivity. Alternating current conductivity, σ ac, measurements taken over the frequency range 10 kHz to 1 MHz were found to follow a power law of the form σ ac ∝ ω n , where ω is the frequency and 0.5〈n〈1, indicative of a hopping conduction mechanism. In addition, a dispersion in the dielectric constant was observed. The dispersion peak frequency has been found to be thermally activated with an activation energy of 0.423±0.002 eV. The results are successfully interpreted in terms of a model proposed by Pike, wherein a classical hopping of charge carriers (over a potential barrier) between the localized states is considered. The direct current conductivity activation energy predicted from this model is found to be consistent with the experimentally obtained value.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00540648
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