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  • 1
    Electronic Resource
    Electronic Resource
    Digestion and the Production of Sulphuric Acid by Mollusca (1955)
    [s.l.] : Nature Publishing Group
    Nature 175 (1955), S. 733-734 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Preliminary experiments showed that cellulase contained in the crystalline styles of both Cadatwra and Melanoides was more active at pH. 5-5 than at pH. 7 -0, and that the alimentary canal in both species had an acid reaction. Style material, obtained from several specimens of Caelatura, was ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/175733b0
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  • 2
    Electronic Resource
    Electronic Resource
    Local Hydrological Conditions in Lake Victoria (1952)
    [s.l.] : Nature Publishing Group
    Nature 169 (1952), S. 839-840 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The observations recorded here were collected from the Buvuma Channel, an area of thirty square miles which lies at the north end of Lake Victoria between the mainland and the line of islands which separates it from the Lake proper. This channel is about twenty metres deep, whereas beyond the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/169839b0
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  • 3
    Electronic Resource
    Electronic Resource
    Digestion in Tilapia esculenta (1951)
    [s.l.] : Nature Publishing Group
    Nature 167 (1951), S. 900-901 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1 illustrates the phytoplankton of Lake Victoria, Figs. 2 and 3 the contents of the stomach and rectum of a freshly caught T, esculenta. The long filaments of Melosira which are found in the lake plankton are usually broken into short lengths not more than twelve cells long by the filtering ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/167900a0
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  • 4
    Electronic Resource
    Electronic Resource
    Polarization analysis of the magnetic excitations in Invar Fe"8"6B"1"4
    Amsterdam : Elsevier
    Physica B: Physics of Condensed Matter 180-181 (1992), S. 253-255 
    Details
    ISSN: 0921-4526
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0921-4526(92)90725-8
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  • 5
    Electronic Resource
    Electronic Resource
    SOME EFFECTS OF THE DESTRUCTION OF AQUATIC WEEDS IN LAKE ROTOITI, NEW ZEALAND (1966)
    Oxford, UK : Blackwell Publishing Ltd
    Weed research 6 (1966), S. 0 
    Details
    ISSN: 1365-3180
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary. A bay in Lake Rotoiti was completely cleared of a heavy infestation of Lagarosiphon major by means of diquat at a concentration of 05 ppm. Weed kill was alow and there was no reduction of dissolved oxygen in the area, probably because of the cool weather at the time (April). Considerable numbers of planktonic algae developed, but after a few months it was apparent that herbicide treatment had caused an exchange of Lagarosiphon for a less massive growth of Nilelta species. Some of the changes in bio-logical production were measured and an explanation of the observed plant succession is offered.Quelques effets de la destruction des mausaises herbes aquatiques dans le lac Rotoiti, en Nouvelle-Zélande
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3180.1966.tb00902.x
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  • 6
    Electronic Resource
    Electronic Resource
    Polarization analysis of the magnetic excitations in Invar and non-Invar amorphous alloys : 37th Annual conference on magnetism and magnetic materials (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 73 (1993), S. 5369-5371 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Conventional spin wave theory works remarkably well in describing the spin dynamics of both Invar and non-Invar isotropic ferromagnets, with the important exception that for Invar systems the magnetization decreases much more rapidly with temperature than can be explained based on the measured spin wave dispersion relations. We have been carrying out triple-axis polarized inelastic neutron scattering experiments on the amorphous ferromagnets Fe86B14 (Invar system) and Fe40Ni40P14B6 (METGLAS(large-closed-square) 2826) in order to separate the longitudinal magnetic fluctuations from the transverse (spin wave) excitations, and thereby determine if the presence of longitudinal excitations might resolve this discrepancy. The present measurements exhibit longitudinal excitations below Tc, but in both materials. Possible interpretations of the results are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.353733
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  • 7
    Electronic Resource
    Electronic Resource
    Spin dynamics of amorphous Fe90−xNixZr10 (invited) (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 67 (1990), S. 5223-5228 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Amorphous Fe90−xNixZr10 is a system that exhibits a relatively high degree of magnetic exchange frustration, which becomes stronger as the system approaches the composition of amorphous pure iron. Thus, while samples with moderate amounts of iron (x≥5) are ferromagnetic, the samples with the highest concentration of iron (x≤1) behave like reentrant spin glasses. We have performed a detailed neutron scattering study of the spin-wave excitations in this system for x=1, 5, 10, 20. In all cases, well-defined spin-wave excitations were observed below a transition temperature Tc that decreased from 455 K (for x=20) to 250 K (for x=1). For x=5, 10, 20 the spin-wave stiffness coefficient follows the temperature dependence expected for a conventional ferromagnet but the spin-wave excitations broaden considerably at low temperatures. For x=1 the spin-wave stiffness coefficient softens at low temperatures and an elastic component of the scattering, associated with the development of a spin-glass order parameter, appears below T≈0.28Tc. A coexistence of propagating spin-wave excitations and spin freezing phenomena is observed below this temperature down to T=0.09Tc. These results are discussed in terms of the relevant current theories.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.344618
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  • 8
    Electronic Resource
    Electronic Resource
    Ultrafast response micropipette-based submicrometer thermocouple (1995)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 66 (1995), S. 3300-3306 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Submicrometer-size thermocouples at the tip of gold-coated glass micropipettes containing a platinum core were produced and tested. The response time of such thermocouples measured with different techniques appeared to be not bigger than a few microseconds. The calculations indicate that the spatial selectivity of this new class of thermocouple devices can be less than 2 μm along the pipette and less than 50 nm across the pipette. The suitability of this thermocouple for light intensity measurements with micrometer spatial resolution is demonstrated by measuring the focused beam of an argon-ion laser. In addition, such thermocouples are intrinsically suitable for applications in scanned probe microscopies. All these unique advantages make the pipette thermocouples a new and promising sensor in a variety of applications. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1145498
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  • 9
    Electronic Resource
    Electronic Resource
    Frequency dependence of core loss in rapidly quenched Fe-6.5 wt. %Si (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 5370-5372 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The frequency, field, and temperature dependencies of core loss in rapidly quenched Fe-6.5 wt. %Si ribbons are reported. The annealed material exhibits (001)〈uv0〉 fiber texture, resulting in isotropic properties in plane; equivalent losses and B-H loops are seen in tape-wound toroids and in annuli punched from ribbon. Hysteresis losses predominate in the present Fe-6.5%Si up to about 1 kHz, as the thin gauge and high resistivity reduce eddy current losses from those of conventional nonoriented steels. The 2-kHz/1.0-T core losses are a factor of 6–8 higher in conventional M-15 than in Fe-6.5%Si. The core losses of Fe-6.5%Si are about 40% higher at 77 than at 373 K. The loss data are not in agreement with the predictions of Bertotti's theory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.342374
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  • 10
    Electronic Resource
    Electronic Resource
    Use of resistivity and magnetic measurements to monitor recrystallization of metallic glasses (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 2986-2988 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: It is shown that resistivity and magnetization measurements can be used to monitor the controlled devitrification of metallic glasses. These measurements are especially useful in the case of Fe-based metallic glasses to be used at high frequency. In these materials, transformation of about 1 vol. % of the amorphous matrix into crystalline α-Fe is known to produce enhanced magnetic properties. Magnetic techniques are especially sensitive when the heat treatment is carried out above the Curie temperature of the amorphous matrix but below the Curie temperature of the α-Fe precipitates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.340923
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