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  • Springer  (74)
  • Wiley-Blackwell  (4)
  • American Institute of Physics (AIP)
  • 1965-1969  (78)
  • 1
    Electronic Resource
    Electronic Resource
    Continuity in ordered spaces (1968)
    Springer
    Mathematische Zeitschrift 104 (1968), S. 231-246 
    Details
    ISSN: 1432-1823
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01110291
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  • 2
    Electronic Resource
    Electronic Resource
    Repulsive fixpoints of entire functions (1968)
    Springer
    Mathematische Zeitschrift 104 (1968), S. 252-256 
    Details
    ISSN: 1432-1823
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01110294
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  • 3
    Electronic Resource
    Electronic Resource
    Water dependent and water independent fluxes of potassium in exuding root systems of Ricinus communis (1969)
    Springer
    Planta 89 (1969), S. 212-223 
    Details
    ISSN: 1432-2048
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The flux of water, $$f_{{\text{H}}_{\text{2}} {\text{O}}}$$ , to the xylem of exuding root systems of Ricinus communis was controlled using a range of mannitol concentrations permitting the influence of this water flux on the potassium flux, f K, to be studied. The relationship between $$f_{{\text{H}}_{\text{2}} {\text{O}}}$$ and f K thus obtained was investigated, for a number of external concentrations of potassium, Cm, supplied as potassium nitrate. An analysis of these data indicated the presence of a water dependent and a water independent f K both of which varied with Cm. The water dependent f K shows a parabolic relationship with Cm for Cm values 〈1 mM followed by a sharp inflection and decline at higher Cm values whereas the water independent f K shows an hyperbolic relationship over the same range of Cm values. Uptake of potassium by exuding root systems was measured and shown to be dependent on the solute potential of the medium. The uptake was also shown to exhibit a dual absorption isotherm the kinetics of which indicate a low Km system (system 1) and a high Km system (system 2). The Km value obtained for system 1 is very similar to that obtained for the water independent f K. It is postulated that the water independent f K is contributed by that portion of f K arriving in the stele via the cortical symplast and is directly dependent on Cm. The water dependent f K is contributed by those ions moved across the root in response to centripetal water movement through the cortical cell walls.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00385027
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  • 4
    Electronic Resource
    Electronic Resource
    The salivary gland chromosomes of Anopheles hectoris (1966)
    Springer
    Chromosoma 19 (1966), S. 126-136 
    Details
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The salivary gland chromosome map of Anopheles hectoris is described and figured. It is proposed that this map be considered the standard for this species. The hectoris chromosomes show a close relationship to those of Anopheles pseudopunctipennis pseudopunctipennis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00332796
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  • 5
    Electronic Resource
    Electronic Resource
    The alteration of olivine in basaltic and associated lavas (1967)
    Springer
    Contributions to mineralogy and petrology 16 (1967), S. 233-257 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract A study of the alteration products of olivines in lavas from a number of volcanic regions indicates the temperature and oxidation conditions under which deuteric alteration has taken place. High temperature oxidation of basaltic olivine results in either exsolution of hematite associated with a more forsteritic olivine, or formation of a symplectic intergrowth of magnetite and orthopyroxene. Continued oxidation of the metastable assemblage magnetite + orthopyroxene produces hematite+forsterite. Identical textures and mineralogical assemblages have been produced in a number of heating experiments, and compare closely with natural examples, and with reheated olivines from gabbroic and ultra-basic xenoliths. The advanced oxidation state of coexisting Fe-Ti oxides associated with highly altered olivines confirms the suggestion that processes of oxidation are the prime causes of high temperature deuteric alteration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00371094
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  • 6
    Electronic Resource
    Electronic Resource
    The alteration of olivine in basaltic and associated lavas (1967)
    Springer
    Contributions to mineralogy and petrology 16 (1967), S. 258-273 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Olivines which cool under oxidizing conditions exsolve iron oxides at high temperature, and at low temperatures break down to essentially chloritic materials. Olivines which cool under non-oxidizing conditions alter at intermediate temperatures to complex assemblages of chlorite and interstratified phyllosilicates containing a smectite. Alteration under oxidizing conditions at low temperature, probably below 140° C, produces “iddingsite”, an orientated assemblage of goethite and interstratified phyllosilicates also containing a smectite. Post-deuteric alteration extends or initiates the breakdown of olivine to phyllosilicate mixtures often resulting in widespread movement of materials through the flow. Post-deuteric alteration of “iddingsite” produces strongly pleochroic, highly ordered varieties which eventually break down to green phyllosilicate assemblages. Weathering of olivine may produce orientated assemblages similar to deuteric forms of “iddingsite”. Weathering of green alteration products results in oxidation and the liberation of discrete iron hydroxides. Alteration in all cases requires exchange of material between interstitial components and olivine. During deuteric alteration, plagioclase and pyroxene are usually unaffected.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00371095
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  • 7
    Electronic Resource
    Electronic Resource
    The structure of the chromosomes in human primordial oocytes (1967)
    Springer
    Chromosoma 22 (1967), S. 358-377 
    Details
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Primordial oocytes (oocytes in primordial follicles) from human ovaries aged 51/2 months post conception to 11 3/4 years post partum were examined in: (a) squash preparations of fresh and fixed tissue; (b) histological preparations; and (c) thin sections by electron microscopy, in order to study the structure of the chromosomes. — The light microscope shows that the chromosome consists of a thread bearing numerous fine lateral appendages. Cytochemical tests indicate that the thread contains DNA, and is surrounded by material containing RNA and protein. — The electron microscope shows that there are three main structural components in the chromosome: (i) an axis or “core” containing at least two longitudinal strands about 200 Å thick; (ii) a surrounding sheath composed of coiled fibrils which form symmetrically arranged columns and loops, and (iii) clusters of large granules which are associated with the outer parts of the sheath. Small nucleoli and other granular bodies are also present. — These observations indicate the presence of lampbrush chromosomes in the human oocyte. The significance of this type of chromosome in mammals is discussed in relation to the differential radiosensitivity of the oocytes, and to the form of chromosomes at the dictyate stage in rodents.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00319880
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  • 8
    Electronic Resource
    Electronic Resource
    P28S1 (1969)
    Springer
    Aequationes mathematicae 2 (1969), S. 114-115 
    Details
    ISSN: 1420-8903
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01833497
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  • 9
    Electronic Resource
    Electronic Resource
    P48S1 (1969)
    Springer
    Aequationes mathematicae 2 (1969), S. 387-389 
    Details
    ISSN: 1420-8903
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01817722
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  • 10
    Electronic Resource
    Electronic Resource
    A sine functional equation (1969)
    Springer
    Aequationes mathematicae 2 (1969), S. 397-398 
    Details
    ISSN: 1420-8903
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01817730
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