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  • 1980-1984  (3)
  • 1940-1944  (1)
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Current genetics 2 (1980), S. 61-67 
    ISSN: 1432-0983
    Keywords: Axenomycin ; Ribosome genetics ; Yeast ; Protein synthesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Axenomycin inhibits protein synthesis in vivo and in vitro in Saccharomyces cerevisiae. The antibiotic acts by binding to ribosomes, most probably to the large ribosomal subunit. Mutant strains resistant to axenomycin appear to contain ribosomes that are not inhibited by the antibiotic. The responsible gene has been mapped on the VII chromosome between the centromere and the leu1 gene.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Current genetics 4 (1981), S. 215-220 
    ISSN: 1432-0983
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Several mutants resistant to Mn2+ have been isolated and characterized in Saccharomyces cerevisiae. All the mutations are semidominant and allelic to a single nuclear gene (MNRI). Mg2+ in the growth medium reverses the inhibitory effect of Mn2+ in a competitive way. This appears to be due to the inhibition of the uptake of Mn2+ by the cells, not to an increase of the amount of Mg2+ inside the cells. The analysis of the distribution of Mn2+ taken up by growing cells shows that the amount of the ion present in insoluble form is far higher in resistant than in sensitive cells. We therefore believe that yeast cells have a sequestering system for Mn2+ and that the major difference between mutants and wild-type strains lies in the much higher efficiency of this system.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Earth, moon and planets 22 (1980), S. 47-61 
    ISSN: 1573-0794
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The problem of the motion of grains in the protosolar nebula is discussed. Time scales of the vertical and radial displacement are computed. The structure of the dust disk that can be formed is discussed in the framework of different protosolar nebula models. The results obtained under the hypothesis of quiescience of the gas component are compared with those in presence of a fully developed turbulence.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Mycopathologia 4 (1943), S. 207-214 
    ISSN: 1573-0832
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Résumé L'auteur ayant analizé par rechèrches quantitatives le phénomène de la filamentisation dans un champignon levuriforme conclue que la filamentisation a le but de faciliter l'absorption des matérieux nutritifs lorsque ces-ci sont bien dilués dans le milieu de culture. L'inibition réciproque entre le pseudomycelia des colonies de levure parallèles n'est pas déterminé par une substance emp/'echante qui se trasmet dans le milieu de culture, mais seulement par un empauvrissement des matérieux nutritifs.
    Abstract: Riassunto I'A., avendo analizzato con esperienze quantitative, il fenomeno della filamentizzazione in un lievito asporigeno conclude che la comparsa del filamento ha lo scopo di facilitare l'assorbimento dei materiali nutritivi quando questi sono troppo scarsi nel mezzo di cultura. L'inibizione reciproca dei filamenti di colonie di lievito parallele non è dovuta ad una sostanza inibitrice diffusa nel mezzo di cultura ma semplicemente ad un impoverimento del mezzo culturale stesso.
    Notes: Summary By means of a quantitative investigation of mycelium formation in an asporogenous yeast the author reached the conclusion that pseudomycelium-production facilitates the absorption of nutrients when these are highly diluted in the culture medium. The reciprocical inhibition of mycelia by parallel growing colonies does not depend upon an inhibitory substance diffusing into the medium, but on the exhaustion of the culture medium.
    Type of Medium: Electronic Resource
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