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  • 1970-1974  (167)
  • 1960-1964  (78)
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Year
  • 1
    Monograph available for loan
    Monograph available for loan
    Geneva : World Meteorological Organization
    Associated volumes
    Call number: MOP Per 800(355)
    In: WMO
    In: Technical note
    Type of Medium: Monograph available for loan
    Pages: XII, 73 S. : Ill., graph. Darst.
    Series Statement: WMO / World Meteorological Organization 355
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of comparative physiology 93 (1974), S. 301-313 
    ISSN: 1432-1351
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Secretion of LH in quail is a photoperiodically-controlled response. The temporal pattern of secretion was determined in an attempt to gain information on the possible rhythmic nature of secretion of this hormone. Sexually mature birds undergoing gonadal regression in response to short photoperiods (8L∶16D) had low plasma levels of LH but showed markedly increased titres after restimulation with a single long photoperiod (20L∶4D). Secretion of the gonadotrophin occurred late in the photoperiod some 18–19 hr from “dawn” and persisted at a high level during the period of darkness; during a second long photoperiod plasma levels decreased in the first few hours but then the pattern of secretion recurred at a similar time to that in day 1 (Figs. 2, 4). When regressing birds were restimulated with daylengths of 14L∶10D, LH secretion was still delayed until some 18 hr from dawn, occurring under these conditions during the dark period (Fig. 3). If LH secretion results from processes initiated during coincidence of light with a “sensitive” phase of a rhythm of photoinducibility, it would appear that there is a delay of several hours between such coincidence and pituitary response.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 196 (1962), S. 667-668 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Wool samples (approximately 20 mg) were first pretreated for 10 min with dilute solutions of the following oxidizing agents: sodium perborate, sodium persulphate, peracetic acid, performic acid, hydrogen peroxide, and ferrous ion-hydrogen peroxide. The samples were then centrifuged, packed into ...
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 199 (1963), S. 794-794 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Apart from brief semi-classical discussions of the shape of the primary locus5,6, little comment has been made on their geometry from a quantum point of view. The geometry of the primary and subsidiary loci, which is therefore discussed here, has obvious applications to identifications of molecular ...
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 186 (1960), S. 958-959 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Until reliable measurements of intensities have been made, it is therefore worth while to inquire into what quantitative conclusions, if any, may be drawn from the plate blackenings. A simple method was developed some years ago1,2 by which a test of quantitative significance is first applied to ...
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 186 (1960), S. 715-715 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The availability of Kodak O to Z emulsions1 (and similar emulsions of other manufacturers, for example Ilford Q emulsions), each sensitized to have a maximum response in a different wave-length region, enables a spectroscopie survey to be made by a sequence of separate exposures of different ...
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 185 (1960), S. 927-927 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Bemegride labelled with carbon-14 was incubated with rat liver slices in Krebs-Ringer-phosphate solution for 5 hr. at 37 C. and two radioactive spots were revealed on chromatography of the liquid medium. The R p values, 0 -88 and 0 -80, corresponded to those obtained from rat urine, suggesting that ...
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 192 (1961), S. 156-157 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The glass fragment when collected weighed approximately 18 gm. Part of it was crushed and natural glass fragments hand-picked from devitrified material for chemical analysis. Examined optically these glass fragments appear homogeneous without crystallites, microlites or any other crystallization ...
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 194 (1962), S. 506-507 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Let S be the senility of any living system, presumably a 'function of state' for that system. Then dS/dt will be the senescence-rate, $, for that system. Similarly, if G is the size, or more accurately the state of development of the system, then dG/dt, or () will be the rate of growth or ...
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 193 (1962), S. 966-967 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Using quantum mechanics in a second paper2, the influence of the overlap integral of the two vibrational wave functions on the band intensity was established. The circumstances in which these ideas were developed has been also reviewed by Condon3. Further investigation of the geometry in the v', ...
    Type of Medium: Electronic Resource
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