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  • 1
    Electronic Resource
    Electronic Resource
    Development and functions of the shell sculpture of the marine snail Ceratostoma foliatum (1974)
    Springer
    Marine biology 24 (1974), S. 77-83 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The shell of the adult Ceratostoma foliatum (Gmelin) is characterized by three varices with foliations, and a tooth on the anterior portion of the outer lip. These features are derived gradually from the markedly different sculpture of shells of small juveniles (a network of fine axial and spiral cords). The sculpture changes as the thin, cord-like basic varix is elaborated, reinforced, and modified by the development of a secondary structure (the tooth) and as the number of varices per whorl decreases. Most muricid shell patterns can be derived from juvenile patterns similar to that of C. foliatum by quantitative variations in these four processes. Likely functions of the complex and varied muricid shell structures include stabilization in shifting substrates, defense against predators, and strengthening of the shell. Different functions and shell-growth patterns are likely for the different types of varices. Shell structures are most elaborate on shells of adults. A structure's functions are likely to change as the structure becomes more complex on each successive whorl. The functional period in an individual's lifespan is consequently restricted by the pattern of growth, the rate of structural development, and the rate of shell erosion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00402850
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  • 2
    Electronic Resource
    Electronic Resource
    Utilization of model membranes in a test for the mechanism of ethylene action (1970)
    Springer
    The journal of membrane biology 3 (1970), S. 173-179 
    Details
    ISSN: 1432-1424
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Summary Reversible alteration of the surface tension of thin films of lipids, proteins and mixtures of both resulted when the thin films were treated with ethylene and other aliphatic gases. This effect appeared to be a nonspecific surface effect related to the molecular size of the gases. Ethylene produced no change which would ascribe to it any specific properties in this test system. The conductivity of an egg lecithin-cholesterol bilayer membrane separating two electrolytes was unaffected by all the test gases (including ethylene), but chloroform vapors markedly altered the conductivity in a reversible manner. In each of the test systems empoloyed, there was no specificity exhibited by ethylene, either qualitatively or quantitatively, indicating the mechanism of ethylene action cannot be explained as a simple physical effect on membranes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01868014
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  • 3
    Electronic Resource
    Electronic Resource
    Life histories of large and small murexes (Prosobranchia: Muricidae) (1974)
    Springer
    Marine biology 24 (1974), S. 229-242 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract One can predict the major features of a muricid's life history from its adult size. Most adults do not grow, and juveniles of all species grow 1 to 2 mm/month, so that larger adults have had fonger juvenile periods. Larger females deposit larger egg capsules and, since each of these contains more eggs, their clutches are larger. Small females deposit several clutches each year, and thus have relatively large annual fecundities. However, large females live longer, so each spawns many more eggs in her life-time than would a smaller female. From 90 to 99% of the juveniles die within their first year. However hatchings of small species are much more likely to complete their first year; a newly hatched Urosalpinx cinerea is 25 times more likely to survive long enough to breed once than a newly hatched Ceratostoma foliatum (Gmelin, 1791).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00391898
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  • 4
    Electronic Resource
    Electronic Resource
    Sexual Differences in Human Crowd Motion (1972)
    [s.l.] : Nature Publishing Group
    Nature 240 (1972), S. 353-355 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Table 1 Numbers for 1965-1966 and 1970 Observations Students Pedestrians Children 1965-1966 Still mode __ _ . 185 Walk mode 693 628 377 Run mode - 9 217 1970 Walk mode, males 500 623 __ Walk mode, females 636 452 - Table 2 Summary of %2-squared Tests of the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/240353a0
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  • 5
    Electronic Resource
    Electronic Resource
    Was this Debate in Vain ? (1972)
    [s.l.] : Nature Publishing Group
    Nature 238 (1972), S. 184-185 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] ONE is bound to wonder why the government went to the trouble it did? and it went to a lot of trouble?to consult all the interested parties about the Rothschild Report when, to judge by the result, it had so little intention of departing, other than marginally, from Lord Rothschild's main tenets ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/238184a0
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  • 6
    Electronic Resource
    Electronic Resource
    Telescope Administration (1971)
    [s.l.] : Nature Publishing Group
    Nature 232 (1971), S. 588-589 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR,?Your article on "New Astronomy" (Nature, 232, 289; 1971) was informative and interesting. Before commenting on points of substance, however, may I correct one misunderstanding which the article revealed ? I refer to the "widely held" criticism, attributed to "many astronomers" who see the RGO ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/232588c0
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  • 7
    Electronic Resource
    Electronic Resource
    Complementation Analysis of Maple Syrup Urine Disease in Heterokaryons derived from Cultured Human Fibroblasts (1973)
    [s.l.] : Nature Publishing Group
    Nature 243 (1973), S. 533-535 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Intergenic2,3 and possibly interallelic4,5 complementation of other mutations has been reported in fused mammalian cells. We approached genetic heterogeneity in MSUD by using Sendai virus-induced fusions of skin fibroblasts derived from unrelated patients. If fusing two different mutant cells ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/243533a0
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  • 8
    Electronic Resource
    Electronic Resource
    Organic Mercury Compounds in Coastal Waters (1973)
    [s.l.] : Nature Publishing Group
    Nature 242 (1973), S. 452-453 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We have determined total and inorganic mercury in coastal waters and adjacent river waters in the vicinity of Long Island Sound. The mercury determinations were made on two different sets of 100 ml. aliquots of natural water. Both sets of samples were collected in glass bottles and acidified to pH ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/242452a0
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  • 9
    Electronic Resource
    Electronic Resource
    Evolutionary Implications of Collar Cell Ectoderm in a Coral Planula (1973)
    [s.l.] : Nature Publishing Group
    Nature 245 (1973), S. 50-51 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1 Collar cells of planula ectoderm each with a single flagellum surrounded by 10-11 mucus-linked microvilli. Note vesicles at each side of the flagellum. (Index line 0.5 mm.) Planulae were collected and fixed in 2.5% glutaraldehyde in 0.1 M sodium cacodylate buffer, pH 7.2, containing 0.7 M ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/245050a0
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  • 10
    Electronic Resource
    Electronic Resource
    Couplings of Enzymes onto Microorganisms (1972)
    [s.l.] : Nature Publishing Group
    Nature 235 (1972), S. 389-389 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] It is well known that yeast cells secrete a number of enzymes including invertase, phosphatase and proteinase that become coupled naturally either by entrapment or covalent linkage to the mannan of the cell wall5. If cereal flour is added to a medium in which yeast is growing, b-amylase present in ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/235389a0
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