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  • 1975-1979  (8)
Source
Material
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Free-running activity rhythm in the natural environment (1977)
    [s.l.] : Nature Publishing Group
    Nature 269 (1977), S. 796-797 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The peaks of locomotory activity in the natural habitat did not exhibit constant relationships to the times of dawn and dusk. The interval between day peaks of activity during a sequence of non-covering tides was less than 24 h. The slope of the regression line for the first 6 d illustrated in Fig. ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/269796a0
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Axonal accessibility and adaptation to osmotic stress in an extreme osmoconformer (1977)
    [s.l.] : Nature Publishing Group
    Nature 269 (1977), S. 430-431 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Electron microscopy showed that the giant axon is overlaid by narrow glial processes which form an incomplete investment. Where the covering is more complete the intercellular clefts which link the extra-axonal fluid with the blood, or bathing medium, do not seem to be occluded by junctional ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/269430a0
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Evidence for hormonal control of integumentary water loss in cockroaches (1975)
    [s.l.] : Nature Publishing Group
    Nature 254 (1975), S. 437-439 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We now have evidence that integumentary waterproofing may be hormonally controlled. Weight loss is more rapid in decapitated cockroaches than in normal ones or in those in which nervous connection with the brain has been severed (Fig. 1). The involvement of a blood-borne factor is also indicated by ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/254437a0
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Sodium transport and lithium movements across the insect blood–brain barrier (1975)
    [s.l.] : Nature Publishing Group
    Nature 255 (1975), S. 723-725 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Insects also seem to be unique in their ability to regulate the ionic composition of the nerve cell environment. It has frequently been postulated that this ionic homeostasis results from active transport by the perineurium and underlying glial elements (Fig. 1). In particular, it has been ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/255723a0
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Facultative blood–brain barrier and neuronal adaptation to osmotic stress in a marine osmoconformer (1977)
    [s.l.] : Nature Publishing Group
    Nature 265 (1977), S. 550-553 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1 Effects of isosmotic dilution on action and resting potentials. Isosmicity (1,024 mOsm) was maintained by addition of sucrose to the physiological saline. The intracellular recordings were made with conventional glass microelectrodes (10-20 MO tip resistance) from the paired giant axons (30 ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/265550a0
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    High-spin states in106Cd (1977)
    Springer
    The European physical journal 280 (1977), S. 363-369 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Levels of106Cd, populated by104Pd(α, 2nγ)106Cd have been studied measuring direct and delayedγ-ray spectra,γ-γ coincidences andγ-ray angular distributions. A decay level scheme is proposed including states up to 4659.8 keV. IntenseE2 transition cascades have been observed. The half-life of an isomeric level located at 4659.8 keV has been measured:T 1/2= 62±6ns. Nuclear Reactions 104Pd(α, 2nγ),E α=31MeV; measuredE γ,I γ,γ-γ coinc, σ(θ)T 1/2.106Cd deduced levels,J, π, Enriched targets. Ge(Li) detectors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01435445
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Short-term changes in activity rhythms in an intertidal arthropod (Acarina: Bdella interrupta Evans) (1979)
    Springer
    Oecologia 38 (1979), S. 291-301 
    Details
    ISSN: 1432-1939
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary On a marine saltmarsh, the intertidal mite, Bdella interrupta Evans, is exposed to periods of regular tidal submergence which alternate with periods of tidal emergence. The mite shows well defined day and night peaks of locomotory activity on the soil surface. During periods of tidal submergence the activity peaks showed an apparent periodicity, of around 12.5 h, characteristic of a tidal rhythm. In the presence of non-submerging tides the periodicity of the activity peaks changed to around 11.5 h. It is suggested that this shorter periodicity results either from free-running of the circatidal clock in the absence of entraining tides or from a sequence of transients that are phaseshifting towards a stable relationship with a second zeitgeber. It is further suggested that the alternation between a ca. 12.5 h and a ca. 11.5 h rhythm ensures that an activity peak is maintained in daylight and, also, reduces the possibility of inundation during the first critical floodings during sequences of rising spring tides.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00345189
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    The distribution of an intertidal aphid, Pemphigus trehernei foster, on marine saltmarshes (1975)
    Springer
    Oecologia 21 (1975), S. 141-155 
    Details
    ISSN: 1432-1939
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The intertidal aphid, Pemphigus trehernei, is restricted to aster plants (Aster tripolium) growing near the edges of creeks and salt pans in low areas on tidal saltmarshes. Aphid populations in mid-marsh areas do not show an equivalent edge effect. In low-marshes the edge soil generally has more surface cracks and cavities which can accommodate aphids and a higher % air space than soil from regions away from edges. Adults and 1st instars can penetrate edge soil more readily than non-edge soil. Aphid abundance is positively correlated with % air space in low-marsh regions. Aphid populations established on potted asters were destroyed or reduced to very low levels when transferred to non-edge regions of low-marsh areas. It is suggested that aphid distribution is primarily limited by soil conditions, especially the extent of soil drainage.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00345557
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    Paper (German National Licenses)
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