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  • Polymer and Materials Science  (98)
  • Engineering  (12)
  • Wiley-Blackwell  (110)
  • International Union of Crystallography
  • Springer
  • 1980-1984  (110)
Collection
Keywords
Publisher
  • Wiley-Blackwell  (110)
  • International Union of Crystallography
  • Springer
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Polyisobutylene modification by sulphenylchloride derivatives (in Russian) (1984)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 35 (1984), S. 561-564 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Durch Umsetzung von Polyisobutylen mit Sulfenylchloriden wurden Polymere mit funktionellen Endgruppen erhalten, deren Struktur mittels IR- und ESR-Spektroskopie sowie Elementaranalyse bestimmt wurde. Es wird gezeigt, daß die Modifizierung des Polymers bei höherer Konzentration des Sulfenylchlorids von einer Dehydrochlorierung begleitet wird. Betrachtet wird der Einfluß der Natur der funktionellen Gruppen und der Molmasse des Polyisobutylens auf die Eigenschaften der modifizierten Produkte.
    Notes: Polymers containing functional end groups, the structure of which was established by elemental analysis, IR and PMR spectra, were obtained by reaction of polyisobutylene with sulphenylchlorides. Dehydrochlorination is shown to accompany the modification on high concentrations of sulphenylchlorides. The nature of functional groups and polyisobutylene molecular weight is considered with respect to their effect on the products modified.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1984.010350809
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  • 2
    Electronic Resource
    Electronic Resource
    Crystal and molecular structure of isoleucinomycin, cyclo[-(D-Ile-Lac-Ile-D-Hyi)3-](C60H102N6O18) (1980)
    New York : Wiley-Blackwell
    Biopolymers 19 (1980), S. 1517-1534 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The crystal structure of a synthetic analog of valinomycin, cyclo[-(D-Ile-Lac-Ile-D-Hyi)3-] (C60H102N6O18), has been determined by x-ray diffraction procedures. The crystals are orthorhombic, space group P212121, with cell parameters a = 11.516, b = 15.705, c = 39.310 Å, and Z = 4. The atomic coordinates for the C, N, O atoms were refined in the anisotropic thermal motion approximation and for the H atoms in the isotropic approximation. Values of standard (R) and weighted (Rw) reliability factors after refinement are 0.073 and 0.056, respectively. The structure is completely asymmetric. The cyclic molecular backbone is stabilized by six intramolecular hydrogen bonds N—H…O=C, five bonds being of the 4→1 type and one being of the 5→1 type. The side chains are located on the molecular periphery. The conformational state of isoleucinomycin in the crystal is intermediate between the corresponding crystalline states of valinomycin and meso-valinomycin. The observed conformation suggests that complexation could proceed via entry of the ion at the face possessing the L-Lac residues, the less crowded face.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.1980.360190808
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  • 3
    Electronic Resource
    Electronic Resource
    Three-dimensional structure of actinoxanthin. III. A 4-Å resolution (1981)
    New York : Wiley-Blackwell
    Biopolymers 20 (1981), S. 679-694 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The protein actinoxanthin (molecular weight 10,300) crystallizes in space group P212121, with cell dimensions a = 30.9 Å, b = 48.8 Å, c = 64.1 Å, and z = 4. The three-dimensional structure of actinoxanthin at 4-Å resolution was determined by x-ray methods on the basis of experimental data from the native protein and five isomorphous derivatives. At the stage of solving the phase problem, the heavy atoms in the derivatives were located using direct methods. The actinoxanthin molecule can be described as an oblate ellipsoid with approximate dimensions 20 × 30 × 40 Å and consists of two different sizes of folded units separated by a well-defined cleft. The larger unit, including the N- and C-terminals of the protein chain, is characterized by a significant content of β-sheet structure. The smaller unit, containing two deca- and hexapeptide cycles closed by disulfide bonds, has a mainly irregular structure.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.1981.360200405
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  • 4
    Electronic Resource
    Electronic Resource
    Stereo decomposition subroutines for three-dimensional plotter programs (1981)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 17 (1981), S. 1571-1575 
    Details
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: Two-dimensional distributions and three-dimensional element meshes are usually plotted in axonometric projection. Stereo decomposition can make the plots of complicated functions and structures more synoptical; the object appears in three dimensions. The method can be useful for the display of displacements and model shapes of three-dimensional structures as well.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/nme.1620171010
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  • 5
    Electronic Resource
    Electronic Resource
    Indentation of a half-space with a rigid indentor (1983)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 19 (1983), S. 1555-1578 
    Details
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: In this work the problem of indentation of a half-space by a spherical rigid indentor is investigated using the finite element method.A system of constitutive equations applicable to elasto-plastic materials subjected to large deformations is used to determine the deformations and stresses for the contact problems. These equations represent the simplest generalization for the large-deformation conditions of the classical theory of plasticity of metals based on the von Mises yield condition and the associated flow rule. The material formulation of the kinematical and dynamical relations will be used. These equations combine the kinematic and the isotropic strain-hardening models.The results obtained from this work are compared with existing solutions for this problem that are confined to small strains and elastic, ideal-plastic materials.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/nme.1620191013
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  • 6
    Electronic Resource
    Electronic Resource
    Synthesis and investigation of the properties of cardo-copolyimides with different microstructure (1983)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 184 (1983), S. 235-252 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Copolyimides, their microstructure being determined by the method of synthesis, were prepared by copolycondensation of 4,4′-oxydiphthalic anhydride (1a), 4,4′-carbonyldipthalic anhydride (1b), or 1,8:4,5-naphthalenetetracarboxylic anhydride with a mixture of two diamines, hexa-, octa-, or dodecamethylene diamine (5a, 6a, 7a) and cardo-diamines 9,9-bis(4′-aminophenyl)fluorene (3a) and 3,3-bis(4′-aminophenyl)phthalide (4) or two aromatic diamines, 4,4′-oxydianiline (9) and 2,2-bis(4-aminophenyl)hexafluoropropane (8), at various mole ratios of the comonomers. Blockcopolyimides with five-membered imide cycles were formed by catalytic imidization of the intermediate polymers prepared by addition of the solid dianhydride to a solution of the mixture of the two diamines, whereas the thermal cyclization of such polymers and the one-step high-temperature synthesis led to random copolyimides. The thermal and mechanical properties of the copolyimides with various microstructure and their solubility in organic solvents were compared.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1983.021840201
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  • 7
    Electronic Resource
    Electronic Resource
    A general iterative method to design Kármán-Trefftz and Joukowsky airfoils (1984)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 20 (1984), S. 1349-1360 
    Details
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: A general iterative method is presented to design Kármán-Trefftz and Joukowsky airfoils of specified thickness and camber ratios and the location of the maximum thickness point. The method has been programmed for a digital computer and results of some applications are given.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/nme.1620200712
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  • 8
    Electronic Resource
    Electronic Resource
    Synthesis and investigation of the properties of cardo-copolyimides with different microstructure (1983)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 184 (1983), S. 893-893 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1983.021840422
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  • 9
    Electronic Resource
    Electronic Resource
    Finite element applications of viscoplasticity with singular yield surfaces (1980)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 15 (1980), S. 421-436 
    Details
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: The side and corner flow rules for viscoplastic materials with singular yield surfaces are discussed and applied in numerical solution of several boundary-value problems. The differences in predictions of displacement and stress fields for different flow rules are demonstrated.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/nme.1620150309
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  • 10
    Electronic Resource
    Electronic Resource
    Novel coal based monomers and thermally stable polymers (1984)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 7 (1984), S. 17-29 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Developments in the synthesis of thermally stable polymers have been discussed, attention being paid to the synthesis of some novel polymers with naphthalene and binaphthalene recurring units. Unconventional organic raw material, i.e. coal tar, has been recognized as suitable monomer source for the production of such polymers.The synthetic routes and properties of novel poly[bis(benzimidazo-benzisoquinolinones)], poly(naphthalimides), poly[oxyarylenebis(acenaphthalene)quinoxalines] and crosslinked polymers with similar structural repeating units have been demonstrated.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1984.020071984102
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