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  • 1
    Electronic Resource
    Electronic Resource
    Gnetins: Resveratrol Oligomers From Gnetum Species (1982)
    s.l. : American Chemical Society
    Journal of natural products 45 (1982), S. 754-761 
    Details
    ISSN: 1520-6025
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/np50024a022
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  • 2
    Electronic Resource
    Electronic Resource
    [Letters to Editor] (1912)
    [s.l.] : Nature Publishing Group
    Nature 89 (1912), S. 87-87 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE phenomenon of “glowing” eyes (autophanous or not) is certainly observed in man. Without taking much interest in the matter, I have noticed three cases, one abroad and years ago, and the other two auite recently in London. In Room 10 of the L.C.C. Technical Institute, Dalston Lane, N.E., ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/089087b0
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  • 3
    Electronic Resource
    Electronic Resource
    Random predator-prey interactions in a varying environment: Extinction or survival (1984)
    Springer
    Bulletin of mathematical biology 46 (1984), S. 175-184 
    Details
    ISSN: 1522-9602
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Notes: Abstract The random predator-prey type interactions of the population species in a random varying environment have been investigated. The Fokker-Planck equation for the transition probability, corresponding to the stochastic differential equations established from Lotka-Volterra equations by the introduction of randomness and variability, has been integrated in the form of a path integral. The transition probabilities for extinction or survival of one or several species have been approximately evaluated and investigated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02463729
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  • 4
    Electronic Resource
    Electronic Resource
    Compression failures in brittle materials: relating observations to a theoretical model (1981)
    Springer
    Journal of materials science 16 (1981), S. 1726-1728 
    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
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00553995
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  • 5
    Electronic Resource
    Electronic Resource
    Scanning electron microscopy studies on mechanism of tear fracture of styrene-butadiene rubber (1983)
    Springer
    Journal of materials science 18 (1983), S. 847-852 
    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 Scanning electron microscopy (SEM) studies on tear fracture of styrene-buatadiene rubber (SBR) vulcanizates have been made with respect to the following parameters: (a) the nature of cross-links (flexible sulphur (-Sx-) type and rigid carbon-carbon (-C-C-) type); (b) the effect of addition of reinforcing filler, ISAF carbon black (N 220) in both cross-linking systems; and (c) the effect of cross-link density in the case of sulphur-cured vulcanizates. It was observed that peroxide-cured SBR (unfilled) vulcanizate undergoes brittle fracture whereas the optimum cross-linked sulphur-cured unfilled vulcanizate undergoes fracture in the shear planes and with branching of the tear path. In the case of sulphur-cured SBR (unfilled) vulcanizate with a higher cross-link density the fracture pattern is similar to that of the vulcanizate which has an optimum cross-link density. When the cross-link density is increased or the nature of cross-link is changed to the rigid C-C type, stress dissipation becomes difficult and hence the tear resistance decreases. Peroxide-cured SBR (filled) vulcanizate shows a typical stick-slip mode of fracture as well as steady tear and microfolds over the surface. Sulphur-cured SBR (filled) vulcanizates show short and curved tear lines. Fillers help to arrest crack growth and to increase stress dissipation, thereby increasing tear resistance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00745584
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  • 6
    Electronic Resource
    Electronic Resource
    Applicability of Weibull analysis for brittle materials (1983)
    Springer
    Journal of materials science 18 (1983), S. 2765-2770 
    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 Weibull analysis for the interpretation of strengths of brittle materials was previously justified for a particular flaw size distribution. The present results show that the Weibull distribution provides a close approximation to the distribution of failure stress for all the flaw size distributions considered. However certain reservations are noted in the interpretation of the Weibull modulus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00547593
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  • 7
    Electronic Resource
    Electronic Resource
    Compression failures in brittle materials: relating observations to a theoretical model (1981)
    Springer
    Journal of materials science 16 (1981), S. 1726-1728 
    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
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02396900
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  • 8
    Electronic Resource
    Electronic Resource
    Scanning electron microscopy studies of failure surfaces of short glass fibre — rubber composites (1982)
    Springer
    Journal of materials science 17 (1982), S. 709-716 
    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 failure surfaces of short-glass fibre reinforced rubber composites have been examined by scanning electron microscopy. The tensile, tear, flexing and abrasion modes have been studied. The different modes generate typical fracture surfaces depending on the nature of the test. The technical properties of the composites with and without reinforcing carbon-black filler have been explained on the basis of fracture modes. For comparison, mixes without fibre have also been studied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00540367
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  • 9
    Electronic Resource
    Electronic Resource
    Scanning electron microscopy studies on tensile rupture of rubber (1982)
    Springer
    Journal of materials science 17 (1982), S. 2594-2598 
    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 Tensile rupture of natural rubber (NR) and styrene-butadiene rubber (SBR), vulcanized by sulphur and peroxide systems, both with and without fillers, has been studied by scanning electron microscopy (SEM). NR gum fracture surfaces show evidence of straininduced crystallization, which is absent in SBR. The fracture surfaces of filler-reinforced NR and SBR vulcanizates are characterized by their roughness and by the presence of short and curved tear lines. Increase of cross-link density changes the fracture mode. Peroxide-cured SBR undergoes brittle fracture, whereas sulphur-cured SBR shows a smooth surface with a few straight tear lines.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00543892
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  • 10
    Electronic Resource
    Electronic Resource
    Scanning electron microscopy studies in abrasion of NR/BR blends under different test conditions (1983)
    Springer
    Journal of materials science 18 (1983), S. 515-524 
    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 abrasion of NR/BR blend vulcanizates has been studied in three different testing machines and the abraded surfaces have been observed in a scanning electron microscope. The ranking of the unfilled blends obtained from Akron abrader is different from that obtained from Du Pont and DIN abraders, while in the case of the black-filled vulcanizates the same ranking can be obtained from all the three machines. Tensile and fatigue properties are believed to play major roles in determining abrasion loss in the Akron abrader, while the effect of friction is more pronounced in the other two machines. The slip angle of 20° and the deformation of the surface layer of rubber during abrasion accounts for the difference in the direction of the abrasion pattern observed in the case of Akron abrader. The carbon black-reinforced vulcanizates give rise to a fine abrasion pattern. Because of the continuous change in the direction of abrasion in DIN abrader, a well-defined pattern was not observed. The very low abrasion loss of 50/50 blend vulcanizates in Du Pont abrader is also evident from the nature of the abraded surface.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00560641
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