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  • 1
    Electronic Resource
    Electronic Resource
    Plant taxonomy (1979)
    [s.l.] : Nature Publishing Group
    Nature 278 (1979), S. 102-102 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Essays in Plant Taxonomy. Edited by H. E.Street. Pp. 304. (Academic: London, New York and San Francisco, 1978.) £12.50; $24.50. PROFESSOR Tom Tutin has no rival for the title of doyen of British plant taxonomisits, and few would question the appropriateness of this Festschrift on the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/278102a0
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  • 2
    Electronic Resource
    Electronic Resource
    Seed-borne microorganisms stimulate seedcorn maggot egg laying (1975)
    [s.l.] : Nature Publishing Group
    Nature 256 (1975), S. 487-488 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1 a, Flies, eggs, puparium and larva of H. platura, b, Examples of varying degrees of injury on squash seedlings caused by earlier maggot feeding. Squash (Cucurbita pepo L.) seeds, which elicit profuse oviposition3 were planted in a system designed to prevent microbial contamination and to ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/256487a0
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  • 3
    Electronic Resource
    Electronic Resource
    Ocean wave theories (1978)
    [s.l.] : Nature Publishing Group
    Nature 272 (1978), S. 194-194 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] JUST over a decade after its initial publication, Professor Phillips has produced a -revised and up-to-date edition of his -book. The book -remains an applied mathematician's view of ocean surface waves, with an emphasis on the analytical mathematical methods that can be used. It also includes a ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/272194a0
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  • 4
    Electronic Resource
    Electronic Resource
    Linear oceans (1978)
    [s.l.] : Nature Publishing Group
    Nature 274 (1978), S. 724-724 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IN the realm of ocean waves and circulation, as in most other physical systems, the system's behaviour can often be described to a good approximation by linear theory. In the ocean the approximation works best for waves in which the water particles move much more slowly than the waves themselves. ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/274724a0
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  • 5
    Electronic Resource
    Electronic Resource
    Seasonal Levels of Abscisic Acid in Buds and Stems of Acer saccharum (1979)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 45 (1979), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Changes in abscisic acid (ABA) were followed in the buds and youngest stems of 6-year-old sugar maple (Acer saccharum Marsh.) saplings at approximately monthly intervals during the year. High levels present in the buds in July and August showed a moderate decline through early October, but subsequently increased following leaf fall and reached the maximum values detected during the study in November and December. Thereafter ABA fell sharply, reaching its lowest point immediately prior to budbreak in early May. While ABA in the stems followed a somewhat similar pattern, only minor changes were observed in the relatively low values detected between June and November. Except for the spring months, when concentrations of ABA in the stems and buds were at minimum levels, the buds always contained several times more inhibitor per unit dry weight of tissue. Analysis of selected samples from both tissues showed that bound (alkaline-hydrolyzable) ABA increased during the overwintering season, with the highest values noted in the spring. Although the patterns of change observed in this study are indicative of a role for ABA in the overwintering process, ABA does not appear to be the primary endogenous factor responsible for initiation of the dormant state.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1979.tb01689.x
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  • 6
    Electronic Resource
    Electronic Resource
    Environmental harshness, heat stress, and Marmota flaviventris (1979)
    Springer
    Oecologia 44 (1979), S. 390-395 
    Details
    ISSN: 1432-1939
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Yellow-bellied marmots (Marmota flaviventris) were studied at three sites in central Oregon. Juveniles substantially reduced their foraging activity when equivalent black-body temperatures exceeded their upper critical temperature. Inclusion of heat stress into estimates of environmental harshness drastically reduced the differences in available foraging time between high elevation and low elevation sites.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00545243
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  • 7
    Electronic Resource
    Electronic Resource
    Coronal X-ray enhancements associated with Hα filament disappearances (1976)
    Springer
    Solar physics 48 (1976), S. 159-186 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A survey of soft X-ray images from Skylab has revealed a class of large-scale transient X-ray enhancements in the lower corona which are typically associated with the disappearance of Hα filaments away from active regions. Contemporary with the Hα filament disappearance, X-ray emitting structures appeared at or near the filament location with shape and size resembling the filament. Eventually these structures faded, but the filament cavity was no longer obvious. Typically the peak of the X-ray event lagged the end of the filament disappearance by tens of minutes. The durations of the coronal X-ray enhancements were considerably longer than the associated Hα filament disappearances. Major flare effects, such as chromospheric brightenings, typically were not associated with these X-ray events. One event analyzed quantitatively had a peak temperature between 1.8 and 2.7 × 106 K, achieved a peak density of ≈109 cm−3 and resulted in an enhancement in the plasma pressure over the conditions of the preexisting coronal cavity of at least a factor of 7. The mass of the coronal X-ray emitting material was about 10% that of the preexisting filament and the thermal energy of the coronal event was on the order of 1029 erg, about 10% of the mechanical energy of the Hα filament eruption. The event appeared to cool by radiative losses and not by thermal conduction. It is likely that the coronal enhancements are caused by heating of an excess of previously cooler material, either from the filament itself, or by compression of coronal material by a changing magnetic field.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00153342
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  • 8
    Electronic Resource
    Electronic Resource
    The association of nonthermal electrons with non-flaring coronal transients (1978)
    Springer
    Solar physics 57 (1978), S. 155-173 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A close temporal and spatial association has been found between erupting filaments/coronal transients and radio noise storm continua. The three transients studied occurred away from active regions and are members of a class not usually accompanied by chromospheric emission. The data analyzed were from the S-054 soft X-ray telescope on Skylab and from one- and two-dimensional interferometers at meter and decameter wavelengths at Nançay and Clark Lake observatories. Calculations confirmed that observed microwave radiation from the transients is due to thermal bremsstrahlung. The results are consistent with an interpretation of heating of an increased amount of coronal plasma by nonthermal, 10–100 keV electrons. Three possibilities for the source of the material are described: (1) The filament material; (2) evaporation from the chromosphere or transition region; and (3) via a long-lived reconnection process.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00152052
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  • 9
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    Antigen stimulation of prostaglandin synthesis and control of immune responses. (1976)
    National Academy of Sciences
    Details
    Publication Date: 1976-04-01
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
    Published by National Academy of Sciences
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  • 10
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    Coronal X-ray enhancements associated with H? filament disappearances (1976)
    Springer
    Details
    Publication Date: 1976-05-01
    Print ISSN: 0038-0938
    Electronic ISSN: 1573-093X
    Topics: Physics
    Published by Springer
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