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  • 1
    Electronic Resource
    Electronic Resource
    Photochemische synthese und kristallstrukturen von cyclopentadienyl-rhodium-eta4-naphthalin und -eta4-anthracen
    Amsterdam : Elsevier
    Journal of Organometallic Chemistry 472 (1994), S. 329-335 
    Details
    ISSN: 0022-328X
    Keywords: Anthracene ; Cyclopentadienyl ; Naphthalene ; Rhodium ; X-ray diffraction
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0022-328X(94)80219-X
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  • 2
    Electronic Resource
    Electronic Resource
    Application of nondestructive techniques for the prediction of elastic anistropy of a textured polycrystalline material (1993)
    Springer
    Journal of nondestructive evaluation 12 (1993), S. 79-95 
    Details
    ISSN: 1573-4862
    Keywords: Ultrasonic velocity ; X-ray diffraction ; texture components ; elastic anisotropy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Mathematics
    Notes: Abstract Effect of processing parameters including cold work and grain size on texture development in copper and 68:32 α-brass thin sheets is investigated. The preferred orientation of grains (texture) is represented quantitatively by the orientation distribution function (ODF) as derived either by X-ray diffraction or by ultrasonic velocity measurements. The texture-induced elastic moduli are derived in the sheet plane at various orientations to the rolling direction. The predicted values of elastic moduli are compared with the mechanically measured ones. An attempt is made to empirically correlate ODF coefficients to the mechanically measured elastic modulus and plastic strain ratio (r-value). The sources of discrepancies such as the limitations of the measuring techniques and the models applied are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00565911
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  • 3
    Electronic Resource
    Electronic Resource
    Crystallography-based prediction of plastic anisotropy of polycrystalline materials (1993)
    Springer
    Journal of nondestructive evaluation 12 (1993), S. 97-107 
    Details
    ISSN: 1573-4862
    Keywords: Plastic strain ratio ; texture ; orientation distribution function ; X-ray diffraction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Mathematics
    Notes: Abstract The on-line prediction of metal sheet formability requires that both material characterization (texture identification) and yield loci predetermination be done in very shor time intervals. Of two applicable approaches, i.e., continuum mechanics and crystallography-based methods, only the latter are suitable for this purpose. Several models of plasticity of a polycrystalline material were reviewed, and their applicability to the prediction of plastic anisotropy of face-centered cubic (FCC) metals was evaluated. A tailored set of cold-rolled copper alloy samples was designed and manufactured, representing the wide spectrum of textures and cold work levels typical for the sheet metal industry. The texture was quantitatively described in the form of the orientation distribution functions derived by the inversion of four incomplete pole figures. The Taylor-Bishop-Hill model was applied in order to calculate the planar variation of the plastic strain ratio. The continuum mechanics of textured polycrystals approach was also used for the prediction of the plastic strain-rate ratio for the same set of deformed materials. The theoretical predictions were compared with the plastic strain ratios measured in tensile tests using strain gauges. The applicability of the models for prediction of the plastic anisotropy of FCC metals was discussed in view of the operating deformation mechanisms and other factors such as strain hardening sensitivity and grain size/shape effects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00565912
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  • 4
    Electronic Resource
    Electronic Resource
    Purification, characterization, crystallization, and preliminary X-ray results from Paracoccus denitrificans porin (1995)
    New York, NY : Wiley-Blackwell
    Proteins: Structure, Function, and Genetics 23 (1995), S. 282-284 
    Details
    ISSN: 0887-3585
    Keywords: crystals ; membrane protein ; outer membrane ; X-ray diffraction ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine
    Notes: The porin from Paracoccus denitrificans ATCC 13543 was purified and crystallized. Two crystal forms were obtained from porin solutions with β-d-octylglucopyra-noside as detergent. Crystals of form I belong to the monoclinic spacegroup C2 with unit cell dimensions a = 112.2 Å, b = 193.8 Å, c = 100.5 Å and β = 129.2°. There is 1 trimer per asymmetric unit. Crystals of form II are triclinic with α = 89.7 Å, b = 98.8 Å, c = 112.5 Å, b = 112.5Å, β = 101.8°, γ = 106.7° (2 trimers per asymmetric unit). Both crystal forms diffract to 3 Å. © 1995 Wiley-Liss, Inc.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prot.340230217
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