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  • 11
    Electronic Resource
    Electronic Resource
    Metal-betaine interactions. XI. Structure of catena-[μ-dichloro-(triethylammonioacetato)cadmium(II)] (1992)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 48 (1992), S. 57-59 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270191008363
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  • 12
    Electronic Resource
    Electronic Resource
    Fifth International Serum Exchange Workshop for Insulin Autoantibody (IAA) Standardization (1992)
    Springer
    Diabetologia 35 (1992), S. 798-800 
    Details
    ISSN: 1432-0428
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00429105
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  • 13
    Electronic Resource
    Electronic Resource
    Variation of heavy metals in recent sediments from Piratininga Lagoon (Brazil): interpretation of geochemical data with the aid of multivariate analysis (1994)
    Springer
    Environmental geology 23 (1994), S. 241-247 
    Details
    ISSN: 1432-0495
    Keywords: Coastal lagoon ; Metallic concentration ; Multivariate analysis ; Depositional environment ; Anthropogenic discharge
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract In the last decade, the Atlantic coast of south-eastern Brazil has been affected by increasing deforestation and anthropogenic effluents. Sediments in the coastal lagoons have recorded the process of such environmental change. Thirty-seven sediment samples from three cores in Piratininga Lagoon, Rio de Janeiro, were analyzed for their major components and minor element concentrations in order to examine geochemical characteristics and the depositional environment and to investigate the variation of heavy metals of environmental concern. Two multivariate analysis methods, principal component analysis and cluster analysis, were performed on the analytical data set to help visualize the sample clusters and the element associations. On the whole, the sediment samples from each core are similar and the sample clusters corresponding to the three cores are clearly separated, as a result of the different conditions of sedimentation. Some changes in the depositional environment are recognized using the results of multivariate analysis. The enrichment of Pb, Cu, and Zn in the upper parts of cores is in agreement with increasing anthropogenic influx (pollution).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00766738
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  • 14
    Electronic Resource
    Electronic Resource
    Assessing a farmer's decision concerning the application timing of nitrogen fertilizer (1994)
    Springer
    Environmental geology 24 (1994), S. 43-56 
    Details
    ISSN: 1432-0495
    Keywords: Nitrogen fertilizer ; Application timing ; Production risk ; Cotton
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract This paper is concerned with a farmer's decision on the timing of nitrogen fertilizer application. Analytical models are developed to determine the necessary conditions for the optimal timing of the application of nitrogen fertilizer. The models, coupled with an estimated cotton yield function, are used to assess a farmer's decision on the optimal application timing of nitrogen fertilizer in cotton production. The empirical results explain various observed application timings of nitrogen fertilizer being used in cotton production in Mississippi, USA, and provide an estimate of the cost to a farmer when he or she must comply with a restriction on the timing of the application of nitrogen fertilizer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00768076
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  • 15
    Electronic Resource
    Electronic Resource
    Interface waves along an anisotropic imperfect interface between anisotropic solids (1992)
    Springer
    Journal of nondestructive evaluation 11 (1992), S. 185-198 
    Details
    ISSN: 1573-4862
    Keywords: Ultrasonic interface waves ; boundary conditions ; imperfect interface ; anisotropy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Mathematics
    Notes: Abstract First and second order asymptotic boundary conditions are introduced to model a thin anisotropic layer between two generally anisotropic solids. Such boundary conditions can be used to describe wave interaction with a solid-solid imperfect anisotropic interface. The wave solutions for the second order boundary conditions satisfy energy balance and give zero scattering from a homogeneous substrate/layer/substrate system. They couple the in-plane and out-of-plane stresses and displacements on the interface even for isotropic substrates. Interface imperfections are modeled by an interfacial multiphase orthotropic layer with effective elastic properties. This model determines the transfer matrix which includes interfacial stiffness and inertial and coupling terms. The present results are a generalization of previous work valid for either an isotropic viscoelastic layer or an orthotropic layer with a plane of symmetry coinciding with the wave incident plane. The problem of localization of interface waves is considered. It is shown that the conditions for the existence of such interface waves are less restrictive than those for Stoneley waves. The results are illustrated by calculation of the interface wave velocity as a function of normalized layer thickness and angle of propagation. The applicability of the asymptotic boundary conditions is analyzed by comparison with an exact solution for an interfacial anisotropic layer. It is shown that the asymptotic boundary conditions are applicable not only for small thickness-to-wavelength ratios, but for much broader frequency ranges than one might expect. The existence of symmetric and SH-type interface waves is also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00566409
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  • 16
    Electronic Resource
    Electronic Resource
    HRTEM study of planar defects and polytypes in MgSiO3 (1993)
    Springer
    Journal of materials science 28 (1993), S. 4037-4042 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The microstructure of a synthetic ceramic with the nominal composition of MgSiO3 has been investigated by means of high-resolution transmission electron microscopy (HRTEM). Mistakes in stacking sequences, including an isolated fault and the coexistence of various stacking disorders resulting from the phase transition of high-temperature phase protoenstatite to room temperature phase clinoenstatite, have been determined. They consist of a sequential arrangement of the same kind of SiO3 tetrahedral chains with identical and opposite skews, respectively. These stacking faults possibly formed during the early stage of nucleation of clinoenstatite on cooling. As a result, the new polytypes with repeat periods of 1.35 and 2.25 nm, respectively, perpendicular to the (100) plane were introduced by varying the stacking sequences in clinoenstatite and orthoenstatite matrix.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00351228
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  • 17
    Electronic Resource
    Electronic Resource
    Identification of a new neutron rich isotope202Pt (1992)
    Springer
    The European physical journal 342 (1992), S. 369-370 
    Details
    ISSN: 1434-601X
    Keywords: 27.80.+W ; 23.40.−S
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The unreported platinum isotope,202Pt, has been identified for the first time byγ-ray measurement of chemically separated activities. The reaction204Hg(n, 2pn)202Pt was used to produce202Pt activity. The half-life of202Pt has been determined to be 43.6±15.2h.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01291520
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  • 18
    Electronic Resource
    Electronic Resource
    A modified microwave oven in the treatment of chronic lymphedema of the extremities (1992)
    Springer
    European journal of plastic surgery 15 (1992), S. 242-245 
    Details
    ISSN: 1435-0130
    Keywords: Microwave ; Lymphedema
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Among the clinical methods in the treatment of chronic lymphedema of the extremities, heating and bandaging treatment has been most successful in our experience with more than 2000 cases. The microwave oven was developed in our clinic in 1983. There was, however, problems yet to be solved: 1) the power output was not high enough, thus, it could not reach the maximal therapeutic temperature; 2) A puncture technique was necessary to take the local tissue temperature. To improve on these deficiencies, a new generation microwave was developed. Forty cases have been treated with this new apparatus with an effective response rate of 100% after one course of treatment. These patients showed a significant (p 〈 0.0) reduction in the circumference and volume of extremities. The elasticity of the soft tissue was restored.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00193663
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  • 19
    Electronic Resource
    Electronic Resource
    Thermodynamic analysis of stable and metastable carbides in the Mn-V-C system and predicted phase diagram (1991)
    Springer
    International journal of thermophysics 12 (1991), S. 1077-1102 
    Details
    ISSN: 1572-9567
    Keywords: carbides ; enthalpy ; entropy ; manganese compounds ; metastable phases ; phase diagrams ; vanadium compounds
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The thermodynamic properties of the Mn-V-C system are not known from experiments, and there is a need for information on the stability of the various phases and the Mn-V-C phase diagram. This kind of information has been obtained by us. Our approach combines the methods of phenomenological modeling and extrapolation from the lower-order systems, which have been developed in the so-called CALPHAD (i.e., CALculation of PHAse Diagrams) work, with predictions of unknown thermodynamic quantities. The predictions are based on regularities in bonding properties and vibrational entropy of 3d-transition metal carbides. By using predicted Gibbs energy functions as input information in the Hillert-Staffansson “two-sublattice” phenomenological model, we take into account the substitution of Mn for V in all carbide phases. Our results are summarized in tables of thermodynamic parameters, calculated isothermal sections of the phase diagram, and the liquidus surface.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00503520
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  • 20
    Electronic Resource
    Electronic Resource
    Thermodynamic analysis of manganese (1990)
    Springer
    International journal of thermophysics 11 (1990), S. 949-969 
    Details
    ISSN: 1572-9567
    Keywords: enthalpy ; Gibbs energy ; heat capacity ; magnetic entropy ; magnetic properties ; manganese ; transitions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A description of the Gibbs energy of the various solid modifications of manganese at 101325 Pa has been obtained for the whole temperature range from 298 K to the melting point. The present analysis accounts for the effect of a magnetic transition in α-, γ-, and δ-Mn, which is treated using the Inden-Hillert-Jarl phenomenological model for the magnetic Gibbs energy. Our description involves smaller magnetic contributions to the entropy of these phases than suggested in the classical work by Weiss and Tauer. An expression for the Gibbs energy of the liquid phase is also reported.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00503586
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