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  • 1
    Electronic Resource
    Electronic Resource
    Instability of Pulse Activity in a Net with Threshold (1962)
    [s.l.] : Nature Publishing Group
    Nature 196 (1962), S. 561-562 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] FOR half a century, threshold has been known to be important in the activities of nerve cell and synapse, but little is known of the general properties that so ubiquitous a feature must impose on the system's behaviour in the large. Beurle1, in his investigations of the transmission of waves of ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/196561a0
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  • 2
    Electronic Resource
    Electronic Resource
    A Brilliant Meteor (1896)
    [s.l.] : Nature Publishing Group
    Nature 54 (1896), S. 271-271 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] I HAD the pleasure on Friday evening last, the 16th inst., of observing a brilliant meteor from a point about half-way between the towns of Blaenau and Llan Festiniog. The time was 9.10 p.m., the sky quite clear, and not dark enough for any stars to appear. The meteor appeared almost due south ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/054271e0
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  • 3
    Electronic Resource
    Electronic Resource
    Separation Techniques in Sedimentary Geochemistry illustrated by Studies of Boron (1962)
    [s.l.] : Nature Publishing Group
    Nature 194 (1962), S. 1073-1074 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] An investigation of boron in British sedimentary rocks illustrates some of the problems and techniques involved in the separation of different constituents of a sedimentary rock. Boron is concentrated in clays and in the resistates mainly in tourmaline. A method to differentiate between boron in ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1941073a0
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  • 4
    Electronic Resource
    Electronic Resource
    Amino-Acid Composition of Serum Mucoprotein in Rheumatic Fever (1961)
    [s.l.] : Nature Publishing Group
    Nature 191 (1961), S. 922-922 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Mucoproteins from five cases of active rheumatic fever whose mean serum mucoprotein tyrosine level was 14-6 (11-9-16-1) mgm./lOO ml. and from three normal children of comparable age and with normal serum mucoprotein tyrosine levels of 3"9 (3'2-4*3) mgm./lOO ml. were separated from other serum ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/191922a0
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  • 5
    Electronic Resource
    Electronic Resource
    Organic Chlorine Insecticide Residues in Wild Birds (1964)
    [s.l.] : Nature Publishing Group
    Nature 201 (1964), S. 1072-1073 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] DECLINES in reproductive success and population numbers of certain predatory birds have coincided in space and time with the use of organic chlorine insecticides1,2. Accordingly, a nation-wide survey of residues of these substances in wild birds was undertaken. 85 bird corpses and 72 eggs were ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/2011072a0
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  • 6
    Electronic Resource
    Electronic Resource
    Explosive Phase Transitions in the Earth's Mantle (1966)
    [s.l.] : Nature Publishing Group
    Nature 209 (1966), S. 182-183 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] For a reaction to be quasi-instantaneous, free energy must decrease and some of the heat liberated must remain in the system, thereby increasing temperature and rate of reaction. If, therefore, phase transitions are a source of seismic energy, mineral phases in the mantle must become metastable ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/209182b0
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  • 7
    Electronic Resource
    Electronic Resource
    Uptake of pp ′-DDT and its Post-mortem Breakdown in the Avian Liver (1966)
    [s.l.] : Nature Publishing Group
    Nature 212 (1966), S. 533-534 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] pp'-DDT, purified by recrystallization, was mixed with a cage bird rearing food in concentrations of 75, 150, 300, 600 and 1,200 p.p.m. by weight. As the rearing food provided only 14 per cent of the total diet the approximate experimental dietary concentrations were 10, 21, 42, 84 and 168 p.p.m. ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/212533a0
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  • 8
    Electronic Resource
    Electronic Resource
    New subclass of birds from the Cretaceous of South America (1981)
    [s.l.] : Nature Publishing Group
    Nature 292 (1981), S. 51-53 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In the 1970s Dr Jose Bonaparte (Museo Argentine de Cien-cias Naturales, Buenos Aires) conducted field excavations in the continental deposits of the Lecho Formation (Salta Group) of El Brete (Salta Province), northwestern Argentina, the age of which is probably Maestrichian (uppermost Cretaceous). ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/292051a0
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  • 9
    Electronic Resource
    Electronic Resource
    Control of acetylcholinesterase by contractile activity of cultured muscle cells (1975)
    [s.l.] : Nature Publishing Group
    Nature 256 (1975), S. 215-216 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Muscle cultures were obtained from 11-day chick embryo pectoral tissue by trypsinisation and the cells were cultured in collagen-coated dishes in a medium of 10% horse serum, 2% embryo extract and 88% minimal essential medium (MEM)2. The fibres exhibited spontaneous contractions and cross ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/256215a0
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  • 10
    Electronic Resource
    Electronic Resource
    Hardening of immersed metals by ultrasound (1974)
    [s.l.] : Nature Publishing Group
    Nature 250 (1974), S. 410-411 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We used strips of metal about 10 cm long, 1 cm wide and 0.1 cm thick. The majority of these were annealed for 2 h at a temperature of about 60% of the melting point (in degrees absolute) and the hardness (HV) was measured with a microhardness tester using a load of 25, 50 or 100 g. The same load ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/250410a0
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