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  • 1
    Electronic Resource
    Electronic Resource
    Biological recovery of an acid lake after reductions in industrial emissions of sulphur (1990)
    [s.l.] : Nature Publishing Group
    Nature 345 (1990), S. 431-433 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The study was conducted on Whitepine Lake (47°17'N, 80°50'W), a clear, dilute (conductivity around 30 µ???? cm"1) headwater lake (surface area 67 ha, maximum depth 22 m), located in a forested area 90 km north of Sudbury. The lake receives both wet and dry inputs of sulphur, but is ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/345431a0
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  • 2
    Electronic Resource
    Electronic Resource
    Reduced rates of proteolysis in transformed cells (1977)
    [s.l.] : Nature Publishing Group
    Nature 266 (1977), S. 58-60 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Cell proteins were labelled by a 16-h incubation with 3H-leucine and protein degradation was followed after an intervening 3-h chase (Fig. 1). This chase period is desirable for the effective removal of unincorporated 3H-leucine and essential to allow for the insulin-insensitive degradation of ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/266058a0
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  • 3
    Electronic Resource
    Electronic Resource
    Recent climatic warming around New Zealand (1975)
    [s.l.] : Nature Publishing Group
    Nature 256 (1975), S. 396-398 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] New Zealand is a long narrow country which straddles the lattitudes 34^7S, with a SW-NE oriented axial range, the Southern Alps, rising to 3,764m in the South Island^ The southern westerly wind belt which crosses southern New Zealand gives higher precipitation on the windward west coast, and less ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/256396a0
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  • 4
    Electronic Resource
    Electronic Resource
    Structure and crystal chemistry of the high- T c superconductor YBa 2 Cu 3 O 7− x (1987)
    [s.l.] : Nature Publishing Group
    Nature 327 (1987), S. 310-312 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] YBa2Cu3O7_x was prepared by high-temperature sintering of the appropriate oxides in an oxygen atmosphere. Powder neutron diffraction patterns were obtained at 80 K, 150 K and room temperature on the high-resolution powder diffractometer (HRPD) at the ISIS spallation neutron source, Rutherford ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/327310a0
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  • 5
    Electronic Resource
    Electronic Resource
    Critical behaviour in deterministic motion in a random environment (1988)
    Springer
    The European physical journal 70 (1988), S. 269-274 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A numerical study of deterministic motion in a random environment in two dimensions is performed. All trajectories are localised except at two isolated points in the parameter space. The distribution of trajectory lengths shows “critical” behaviour as those points are approached. Contact with an analytic estimate, based on analogy with gelation theory, is made in one region of the parameter space. The spatial extent of the trajectories scales with arc length as if they were ideal random walks, surprisingly.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01318308
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  • 6
    Electronic Resource
    Electronic Resource
    The effect of high momentum transfer on scattering from oscillators and crystals (1984)
    Springer
    The European physical journal 56 (1984), S. 13-20 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We examine two aspects of scattering at high energy and momentum transfer; asymptotic forms of scattering laws and comparison of approximate and exact results for a particular system, a harmonic lattice. By treating model systems of harmonically bound particles, an asymptotic analysis shows that, under conditions of high momentum transfer the particle looks as though it is unbound, in the sense that the weighting (envelope) of the various inelastic channels is that of a free particle, although the discreteness of the allowed energy transfers reflects the fact that the particles are, in reality, bound. The discreteness of the energy transfers requires an extension of the usual impulse approximation, which had been realised by Wick for a total cross section calculation, and this is treated in an appendix. An exact numerical technique for handling multiphonon effects directly, that is, without expansions, for the case of scattering from a lattice is used as a check of the Sjölander approximation. The latter treats elastic and one-phonon processes exactly, the remainder in a Gaussian-like approximation. As expected this scheme works well at low and high momentum transfer. At intermediate values the scattering law turns out to have a lot of structure which isnot reproduced. Simple interpretations would then give split peaks and such effects which in reality are simply manifestations of multiphonon processes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01470207
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  • 7
    Electronic Resource
    Electronic Resource
    Polarisation analysis of neutron scattering from crystal field levels (1984)
    Springer
    The European physical journal 57 (1984), S. 191-192 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We argue that polarisation analysis of scattering of an unpolarised beam from a single crystal is a useful technique for looking at crystal field excitations. A general expression for the polarisation in the scattered beam is presented and two illustrative examples worked out.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01318411
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  • 8
    Electronic Resource
    Electronic Resource
    New universality classes in “Percolative” dynamics (1991)
    Springer
    Journal of statistical physics 65 (1991), S. 453-467 
    Details
    ISSN: 1572-9613
    Keywords: Percolation ; external perimeter ; universality ; critical exponents ; threshold
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We study a site analogue of directed percolation. Random trajectories are generated and their critical behavior is studied. The critical behavior corresponds to that of simple percolation in some of the parameter space, but elsewhere the exponents reveal new universality classes. As a byproduct, we use the model to make an improved estimate of the percolation hull exponents and to calculate the site percolation probability for the square lattice.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01053739
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  • 9
    Electronic Resource
    Electronic Resource
    Metals in stocked Lake Trout (Salvelinus namaycush) in lakes near Sudbury, Canada (1988)
    Springer
    Water, air & soil pollution 39 (1988), S. 217-230 
    Details
    ISSN: 1573-2932
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Muscle tissue from stocked lake trout (Salvelinus namaycush) from lakes near the smelters at Sudbury, Canada was analyzed for Al, Cu, Fe, Hg, Mn, Ni, and Zn. Metals in tissue were not abnormally high compared with fish from lakes farther away from the smelters. Tissue concentrations of Al, Fe, Mn, and Zn declined significantly after stocking. Because metal concentrations were lower in hatchery water than the study lakes, this decline in tissue metal suggests that diet plays a prominent role in the uptake of these metals in lake trout. Only Hg showed evidence of accumulation to levels that might be harmful for human consumption, and then only in a few older, larger trout. In contrast, tissue Mn and Zn were inversely correlated with trout weight. Fluctuations, independent of age, body weight or time of year, were observed in tissue concentrations of Al, Cu, and Zn. Annual cycles, independent of pH and alkalinity were observed in tissue concentrations of Fe, Hg, Mn, and Ni. Bioaccumulation of metal proved to be an unfounded concern for the rehabilitation of fish populations in lakes near Sudbury.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00250960
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  • 10
    Electronic Resource
    Electronic Resource
    Effects of acidic meltwater on chemical conditions at nearshore spawning sites (1986)
    Springer
    Water, air & soil pollution 30 (1986), S. 545-552 
    Details
    ISSN: 1573-2932
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Chemical conditions at lake charr (Salvelinus namaycush) spawning sites were monitored during snowmelt in low alkalinity lakes in Ontario, Canada. Embryos within the interstitial water of the spawning substrate were exposed to abrupt and potentially toxic levels of H+ and inorganic Al as acidic runoff water inundated the shallow nearshore sites. Early runoff events, those that occurred while the lake ice was still snow-covered and under-ice water temperatures were 〈2°C, appeared to be most threatening, because of deep penetration of the runoff water. These highly site-specific events exhibit wide temporal and spatial variability.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00303317
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