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  • Springer  (26)
  • Nature Publishing Group  (19)
  • Oxford University Press  (3)
  • American Association for the Advancement of Science (AAAS)  (1)
  • 1980-1984  (49)
  • 1980  (49)
  • 1
    Electronic Resource
    Electronic Resource
    Meteoritic fireballs and luminous efficiency (1980)
    [s.l.] : Nature Publishing Group
    Nature 285 (1980), S. 12-13 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] LUMINOUS streaks of light flashing across the sky are caused by cosmic dust particles burning out in our atmosphere. They are a common enough phenomena and have been seen ever since man looked up to the heavens, but even to-day they still present problems. One of the more pressing ones is the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/285012a0
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  • 2
    Electronic Resource
    Electronic Resource
    Astronomy textbooks (1980)
    [s.l.] : Nature Publishing Group
    Nature 283 (1980), S. 913-915 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The Solar System. By J.A. Wood. Pp.196. published by (Prentice-Hall International: Hemel Hempstead, UK, 1979.) £5.05. Galaxies: Structure and Evolution. By R.J. Taylor. Pp.203. published by (Taylor and Francis Wykeham Publications: London and Basingstoke,, 1979.) Paperback £4.50. The ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/283913a0
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  • 3
    Electronic Resource
    Electronic Resource
    Objects of the Universe (1980)
    [s.l.] : Nature Publishing Group
    Nature 283 (1980), S. 798-798 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] catlogue, n. a list or enumeration systematically arranged in alphabetical or other order, often with the addition of brief particulars. un'iiv()se, n. The whole of created or existing things regarded collectively; all things, including the earth, the heavens, and all that is in them, considered ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/283798a0
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  • 4
    Electronic Resource
    Electronic Resource
    Growth and reproductive rates of Littorina rudis from three contrasted shores in North Wales, UK (1980)
    Springer
    Marine biology 58 (1980), S. 47-54 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Data are presented on growth and reproductive rates of Littorina rudis Maton from 3 contrasted habitats: a sheltered saltmarsh, a moderately sheltered boulder shore and an exposed cliff face. Growth was fastest in L. rudis from the moderately sheltered boulder shore, followed closely by snails from the sheltered saltmarsh. Growth was much slower and the asymptotic size much less in L. rudis from the exposed cliff face, this being attributed to the reduced time available for foraging caused by longer and more erratic periods when the substratum dries out. Eggs extracted from the brood chambers of the saltmarsh L. rudis took about 72 d to hatch in the laboratory at 10°C. No seasonal trend was detected in the percentage of sexually mature snails, which fluctuated erratically round about 54 to 99% in each population. Similarly, the ratio of females: males fluctuated erratically about 1.0. The number of eggs and embryos held in the brood chamber peaked in May–June and birth rates (release of young from the brood chamber) peaked in July-August. Following a lull in August, the brood chamber contents were maintained at moderately high levels throughout the winter, whereas the birth rates declined to very low levels. These differences in the seasonal cycle of brood chamber contents and birth rates were probably caused by seasonal differences in embryological development rate and in the propensity of the young to leave the brood chamber. Fecundity increased with parental size and, because of this, the smaller, slower growing exposed-shore L. rudis had much lower potential fecundities than L. rudis from the other shores. However, the size-specific fecundity of the exposedshore L. rudis was about 1.7 times that of L. rudis on the more sheltered shores. This difference was apparently not attributable to smaller young or to a greater capacity of the brood chamber in the exposedshore L. rudis, and must therefore have been caused by higher rates of egg production. 18% of mature females from the boulder shore and 5% of those from the cliff face were oviparous, having a jelly gland in place of the brood chamber.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00386879
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  • 5
    Electronic Resource
    Electronic Resource
    Effects of combined nitrogen on anapleurotic carbon assimilation and bleeding sap composition in Phaseolus vulgaris L. (1980)
    Springer
    Planta 148 (1980), S. 338-345 
    Details
    ISSN: 1432-2048
    Keywords: Allantoin ; Amino acids ; Bleeding sap ; Nitrogen fixation ; Phaseolus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Dwarf french beans, Phaseolus vulgaris L., were grown with or without inoculation with rhizobia (strain 3644), and with or without a combined nitrogen source (nitrate or ammonium ions). The distribution of radioactivity into products of dark 14CO2 assimilation was studied in roots or nodules from these plants. A detailed study was also made of the distribution and rates of excretion of nitrogen in xylem bleeding sap in 28 day old plants grown on the various sources of nitrogen. Whereas detached nodules accumulated radioactive glycine, serine and glutamate when incubated with 14CO2, bleeding sap from plants root fed 14CO2 contained low levels of radioactivity in these compounds but higher levels in allantoin. Chemical analysis showed allantoin to be the major compound transported in the xylem of nodulated plants, whether or not they were fed on combined nitrogen. In contrast uninoculated plants accumulated mainly amino acids in the bleeding sap, the amount and chemical composition of which depended on the combined nitrogen source.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00388121
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  • 6
    Electronic Resource
    Electronic Resource
    Galileo saw Neptune in 1612 (1980)
    [s.l.] : Nature Publishing Group
    Nature 287 (1980), S. 277-278 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] JOVIAN satellites, lunar mountains, saturnian rings, stars in the Milky Way, Sun spots, phases of Venus - the number of significant observations of astronomical objects made by Galileo Galilei is impressive indeed. The coming together of the invention of the telescope and Galileo's brilliant ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/287277a0
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  • 7
    Electronic Resource
    Electronic Resource
    Charon's diameter (1980)
    [s.l.] : Nature Publishing Group
    Nature 287 (1980), S. 677-678 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] OCCULTATION observations have been the mainstay technique for the measurement of planetary diameters for a considerable time now, and the discovery of such things as the Uranian satellite belt in 1977 and a binary asteroid in 1978 are obvious bonuses. The principle is simple. A planet passes in ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/287677a0
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  • 8
    Electronic Resource
    Electronic Resource
    Museum pieces (1980)
    [s.l.] : Nature Publishing Group
    Nature 288 (1980), S. 430-430 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR-In Dr Halstead's pleas for traditionalism in the Natural History Museum's exhibitions (Nature 20 November, p.208) he makes an assumption that lends much potential support to those whose policies he is so "fervently dedicated" to trying to discredit. It is true that Marxists have attempted to ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/288430b0
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  • 9
    Electronic Resource
    Electronic Resource
    Solar size variation (1980)
    [s.l.] : Nature Publishing Group
    Nature 286 (1980), S. 439-440 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Is the sun getting bigger, getting smaller or staying about the same size? Astronomers are divided as to the answer, some say it is shrinking, some say it remains constant. John A. Eddy, of the High Altitude Observatory, Boulder, Colorado and Aram A. Boornazian, a mathematician with S. Ross and ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/286439a0
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  • 10
    Electronic Resource
    Electronic Resource
    The search for the Zvolen fireball (1980)
    [s.l.] : Nature Publishing Group
    Nature 288 (1980), S. 118-118 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] FIVE all-sky camera stations of the European Fireball Network recorded a bright fireball which penetrated low into the atmosphere on 27 May 1979 at 20h 39min. The fireball terminated close to Zvolen in central Slovakia and may have produced several meteorites. Geometric, dynamic, photometric and ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/288118a0
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