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  • 1975-1979  (8)
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Materialart
Erscheinungszeitraum
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  • 1
    Digitale Medien
    Digitale Medien
    Possible transcriptional control of three polypeptides which accumulate in a temperature-sensitive mammalian cell line (1978)
    [s.l.] : Nature Publishing Group
    Nature 272 (1978), S. 725-727 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] Exponentially growing cultures were labelled for 6 h with 3H-leucine, either in the presence or absence of 5 g ml-1 actinomycin D, at 35 C and 40.5 C. The concentration of actinomycin D used was enough to decrease the total incorporation of 3H-uridine into acid-insoluble material to 5% of its ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/272725a0
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    The size of Rous sarcoma virus mRNAs active in cell-free translation (1977)
    [s.l.] : Nature Publishing Group
    Nature 268 (1977), S. 416-420 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] Sedimentation analysis of mRNA from RSV-infected chick cells suggests that Pr76, the precursor to the virus structural proteins, is synthesised on a mRNA of similar size to virion RNA, whereas a protein with molecular weight 70,000 tentatively identified as the non-glycosylated precursor to the ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/268416a0
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Sodium ions and the shut-off of host cell protein synthesis by picornaviruses (1976)
    [s.l.] : Nature Publishing Group
    Nature 264 (1976), S. 807-809 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] Fig. 1 Effect of sodium chloride on cellular and viral protein synthesis. Reaction mixtures contained (in 25 µl); 20 mM HEPES, pH 7.0, 80 mM KC1, 1.5 mM MgCl2, 6 mM 2-mercapto-ethanol, 50 µM spermine, 250 µM spermidine, 200 µM of each of the unlabelled L-amino acids minus ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/264807a0
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Vegetative reproduction and close packing in a successional plant species (1976)
    [s.l.] : Nature Publishing Group
    Nature 261 (1976), S. 232-233 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] A geometric model for development of dense clones was devised (Fig. 1). It was assumed that an optimal pattern of stem production maximises rate of centrifugal spread, maintains sufficient stem density in already colonised sites to produce a closed canopy, and minimises total rhizome length (and ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/261232a0
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  • 5
    Digitale Medien
    Digitale Medien
    Albinism in relation to competition in bamboo Phyllostachys bambusoides (1977)
    [s.l.] : Nature Publishing Group
    Nature 266 (1977), S. 527-529 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] Production of albino offspring by a given parent at a given time could increase growth and survivorship of non-albino members of the same cohort if the albinos shade interspecific competitors, but impose less intense intraspecific competition than would the same number of photosynthetic seedlings. ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/266527a0
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 6
    Digitale Medien
    Digitale Medien
    Spacing patterns and crown size variability in an Ecuadorian desert shrub species (1979)
    Springer
    Oecologia 40 (1979), S. 203-205 
    Details
    ISSN: 1432-1939
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary Analysis of spacing patterns in a monospecific stand of Croton menthodarus Benth. (Euphorbiaceae) suggests the presence of intraspecific competition. Analysis of the coefficient of variation for crown diameters suggests that increased plant density results in mortality of smallest individuals.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00347937
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  • 7
    Digitale Medien
    Digitale Medien
    Do viruses use calcium ions to shut off host cell functions? (reply) (1977)
    [s.l.] : Nature Publishing Group
    Nature 267 (1977), S. 376-376 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] CARRASCO AND SMITH REPLY-We find the proposal by Durham that changes in calcium ion concentration following infection by viruses are responsible for alterations in host cell functions very attractive. Our model to explain the shut-off of protein synthesis, which was briefly summarised in our Nature ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/267376a0
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 8
    Digitale Medien
    Digitale Medien
    Morphological and physiological correlates of niche breadth in two species of Espeletia (Compositae) in the Venezuelan Andes (1979)
    Springer
    Oecologia 38 (1979), S. 71-82 
    Details
    ISSN: 1432-1939
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary We compared adaptive strategies in two plants of Venezuelan páramos (alpine areas): the widely distributed, caulescent, and pubescent Espeletia schultzii Wedd. with the acaulescent, nearly glabrous E. atropurpurea A.C. Smith which is restricted to mesic sites just above treeline. Both species occur together at 3,450 m, near treeline. Physiologically, E. schultzii was more drought resistant than E. atropurpurea, and was better adapted for carbon dioxide fixation under low temperatures. The densely pubescent leaves of E. schultzii are highly reflective; this increases the intensity of light needed for photosynthetic saturation and influences leaf temperature. Leaf pubescence may reduce the level of insect predation. Measurements of leaf productivity indicate higher values for E. atropurpurea during the rainy season and higher values for E. schultzii during the dry season. However, annual values of leaf productivity are similar for both species. Benefits of specialization in E. atropurpurea include reduced costs for stem and leaf hair production, higher growth rates during the rainy season and the ability to grow beneath canopies of some larger arborescent species. Costs of specialization include lower growth rates during the dry season, great susceptibility to insect predation and restriction to low elevation, mesic sites.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00347825
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