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  • 1
    Electronic Resource
    Electronic Resource
    Nonlinear order-parameter relaxation in the nonlinearσ-model (1980)
    Springer
    The European physical journal 37 (1980), S. 163-169 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract An equation of motion for the order parameter of a relaxational nonlinearσ-model is derived by renormalization-group considerations ind=2+ε dimensions. The result is then used to describe the nonlinear relaxation of the order parameter after switching off an initial symmetry-breaking field below the critical temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01365372
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  • 2
    Electronic Resource
    Electronic Resource
    Zeolite supported PtRh catalysts for CO oxidation and NO reduction: Evidence for bimetallic particles formation and synergism effect (1991)
    Springer
    Catalysis letters 11 (1991), S. 33-40 
    Details
    ISSN: 1572-879X
    Keywords: PtRh bimetallic catalysts ; EXAFS ; CO-O2 reaction ; CO-NO reaction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract PtRh bimetallic particles, evidenced by EXAFS at Pt L3-edge and Rh K-edge, were prepared in the supercages of NaY zeolites. Bimetallic catalysts, PtRh/NaY, were more reactive in CO-O2 and CO-NO reactions than their corresponding monometallic catalysts, Pt/NaY and Rh/NaY.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00866898
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  • 3
    Electronic Resource
    Electronic Resource
    Proton states in193Ir and195Ir populated via the (α) reaction (1978)
    Springer
    The European physical journal 285 (1978), S. 191-201 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The nuclear structures of193Ir and195Ir have been studied using the194Pt(t, α) and196Pt(t, α) reactions. Levels up to ∼2MeV in excitation energy were studied with a resolution of ∼13keV (FWHM) and spectroscopic strengths were extracted. The low-lying states in193Ir have been interpreted in terms of both the Nilsson and the rotation-vibration models including Coriolis, particle-vibration and rotation-vibrational couplings. The previously assigned 3/2+ [402], 11/2− [505], 1/2+[400] and 1/2+[411] bands were populated and candidates for the 5/2+ [402] and 7/2+ [404] bandheads were observed. TheK 0 +2 gamma vibration based on the ground state was populated because it is mixed with the 7/2+ [404] state. Surprisingly, there was no significant difference between the stripping and pick-up strengths for the low-lying states in193Ir, suggesting that the equilibrium nuclear shape of193Ir has large overlaps with the shapes of both192Os and194Pt. The nuclear level structure of195Ir appears to be similar to those of the lighter iridium isotopes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01408746
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  • 4
    Electronic Resource
    Electronic Resource
    Cellular polarity in root epidermis of Gibasis geniculata (1982)
    Springer
    Naturwissenschaften 69 (1982), S. 396-397 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00396697
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  • 5
    Electronic Resource
    Electronic Resource
    Stereoselectivity of microbial oxygenation of metallocene sulphides with different substituent size and central atom (1996)
    Springer
    Applied microbiology and biotechnology 45 (1996), S. 595-599 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract  Stereoselectivity in the oxidation of ferrocenyl sulphides with several species of microorganisms such as Corynebacterium equi was reversed between (methylthiomethyl)ferrocene and (t-butylthiomethyl)ferrocene, indicating that the size of the side chain could control the stereochemical course of the biooxidation. The size seems to be effective within some limit, because the more bulky compound, (phenylthiomethyl)ferrocene, was a poor substrate. On the other hand, the microbial oxidation of (methylthiomethyl)ruthenocene and -osmocene with Mortierella isabellina and that of (t-butylthiomethyl)ruthenocene and -osmocene with C. equi gave levorotatory sulphoxides (85–97% e.e.), which were all found to have R absolute configuration. These stereoselectivities were the same as those for the corresponding ferrocenyl sulphides. Thus, the central atom of the metallocenic sulphides seems not to affect the stereoselectivity in the biooxidation. The microbial oxidation is a useful method to prepare several kinds of chiral metallocenic sulphoxides with high optical purity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002530050735
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  • 6
    Electronic Resource
    Electronic Resource
    Precursory and coseismic resistivity changes (1975)
    Springer
    Pure and applied geophysics 113 (1975), S. 219-227 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary More than 20 coseismic resistivity steps were observed by a resistivity variometer at a station about 60 km south of Tokyo during a six-year period of observation. The logarithmic magnitude of steps normalized to an epicentral distance (δ) of 100 km is linearly correlated to earthquake magnitude (M). The larger the earthquake magnitude is, the longer is the time required for completing a resistivity step. Earthquakes, that produced a step, as plotted on anM-δ graph are clearly separated by a straight line $$M = - 12.5 + 2.5\log _{10} \Delta $$ from those that did not produce a step, δ being measured in units of km. The straight line is approximately equivalent to a resolution of strain steps of the order of 10−9. As the smallest rate of resistivity change that can be observed by the variometer is 10−5 or so, it is apparent that mechanical strain is amplified by a factor of 104 or thereabouts when it is measured in terms of resistivity change. Some of the steps are preceded by a premonitory effect. When long-period changes, mostly due to tidal loadings, are eliminated by a numerical filtration technique, precursors are brought out very clearly in a number of cases. The precursor time ranges from 1 to 7 hours and appears to be independent of magnitude.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01592912
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  • 7
    Electronic Resource
    Electronic Resource
    The early expression of immunoreactivity for calmodulin in the nervous system of mouse embryos (1987)
    Springer
    Histochemistry and cell biology 86 (1987), S. 337-343 
    Details
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Calmodulin (CaM) is a major calcium-binding protein in the brain, where its immunoreactivity is mainly localized in the neurons. In this study, ontogenical changes in the distribution of CaM in the nervous system of mouse embryos were investigated immunohistochemically using a specific antibody against CaM and an indirect immunoenzyme method. Immunoreactive staining was first observed in the marginal layer of the cranial neural tube after 9.5 days of gestation; thereafter, the amount of stained structures increased rapidly. Particularly intense staining was observed in the long neuronal processes extending from or into the brain and spinal cord primordia. Intense immunostaining was also observed in the optic nerve layer of early retinae from 12.5 days of gestation. The appearance of CaM immunoreactivity is thus an early event during neuronal differentiation, apparently concominant with the initiation of axon extension and the appearance of neurofilament proteins.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00494990
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  • 8
    Electronic Resource
    Electronic Resource
    Air-sea interaction studies at the station occupied by R/V Sirius (1980)
    Springer
    Boundary layer meteorology 19 (1980), S. 387-391 
    Details
    ISSN: 1573-1472
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The transfer formulas are used to compute hourly values of sensible and latent heat exchanges for the period July 29 to July 31, 1974. Also, values of eddy shearing stress at the sea surface, Bowen's ratio and dissipation of kinetic energy are computed. The data used cover part of the GATE period for station 20 occupied by the Brazilian Naval Ship R/V Sirius in the Equatorial Atlantic (0730 N 4000 W). The variations in the computed values are studied in relation to rainfall and the synoptic situation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00120599
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  • 9
    Electronic Resource
    Electronic Resource
    Effects of acrylic acid incorporation on the pressure–temperature behavior and the calorimetric properties of poly(N-isopropylacrylamide) in aqueous solutions (2000)
    Springer
    Colloid & polymer science 278 (2000), S. 80-83 
    Details
    ISSN: 1435-1536
    Keywords: Key words Poly(N-isopropylacrylamide) ; Poly(acrylic acid) ; Cloud point ; Thermoresponsive polymer ; High pressure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract  We studied the effects of pH on the pressure–temperature dependence of coil–collapse transition for aqueous solutions of copolymers of N-isopropylacrylamide and acrylic acid (Ac). At low pressures, the transition temperature (T tr) increased with pressure, but T tr decrease with increasing pressure at pressures higher than 50–100 MPa. By increasing the pH, the transition contour shifted to a higher temperature. When the Ac content was increased, the effects of pH became more evident. From a calorimetric study at atmospheric pressure, ΔH tr was found to become smaller by increasing the portion of the ionized residues in the copolymer. The ratio to the van't Hoff enthalpy changes became larger with an increase in pH, which indicated that the production of charge decreased the cooperative domain size.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003969900231
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  • 10
    Electronic Resource
    Electronic Resource
    Nuclearg-factor of the 6+ isomeric state of138Ba and nuclear spin relaxation in noble gases (1976)
    Springer
    Hyperfine interactions 2 (1976), S. 331-333 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01021162
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