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  • 1
    Electronic Resource
    Electronic Resource
    The crystal and molecular structure of 12-ethoxy-2,3-benzo-6,5-naphtho[b][7,12]thiaphosphorin 7,7,12-trioxide (1975)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 31 (1975), S. 750-753 
    Details
    ISSN: 1600-5740
    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/S0567740875003743
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  • 2
    Electronic Resource
    Electronic Resource
    The crystal structure of a second modification of m-nitrobenzoic acid (1975)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 31 (1975), S. 1978-1980 
    Details
    ISSN: 1600-5740
    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/S0567740875006620
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  • 3
    Electronic Resource
    Electronic Resource
    Absolute dimensions of TT Hydrae (1980)
    Springer
    Astrophysics and space science 67 (1980), S. 205-212 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The photometric elements of the Algol type binary TT Hydrae derived by the authors from theirUBV observations during 1973–77 have been combined with the spectroscopic elements given by Sanford (1937) and Sahade and Cesco (1946) to obtain the absolute dimensions of the system. It is found that the spectroscopic orbital elements given by Sanford represent the evolutionary status of the secondary component better than those of Sahade and Cesco. The primary appears to be an Al v main sequence star of mass $$ \sim 3 to 4\mathfrak{M}_ \odot $$ and radius ∼2.3R ⊙. The secondary fills its Roche lobe; it can be represented by a K0iii star of mass $$ \sim 0.8\mathfrak{M}_ \odot $$ and radius ∼6.0R ⊙. Better spectroscopic data are needed for confirmation of these results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00651877
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  • 4
    Electronic Resource
    Electronic Resource
    Electrical resistivity and dielectric strength of plant fibres (1981)
    Springer
    Journal of materials science 16 (1981), S. 1719-1726 
    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/BF02396899
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  • 5
    Electronic Resource
    Electronic Resource
    Mechanical properties of banana fibres (Musa sepientum) (1983)
    Springer
    Journal of materials science 18 (1983), S. 2290-2296 
    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 stress—strain curve for banana fibre is determined. Properties such as the initial modulus (YM), ultimate tensile strength (UTS) and percentage elongation are evaluated as a function of fibre diameter, test length and speed of testing. It is found that YM, UTS and % elongation show little variation in their values for fibres of diameter ranging from 50 to 250 μm. The UTS and breaking strain are found to decrease with an increase in the test length while both breaking strength and breaking strain remain constant with the increase of speed of testing from 0.5 to 100 × 10−3 m and thereafter they both decrease. These observed properties are explained on the basis of the internal structure of the fibre, namely, the number of cells, spiral angle and the number of defects. Scanning electron microscopic (SEM) studies of the fractured surfaces of these fibres indiacte that the failure is due to pull-out of microfibrils accompanied by tearing of cell walls; the tendency for fibre pull-out seems to decrease with increasing speed of testing.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00541832
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  • 6
    Electronic Resource
    Electronic Resource
    Structure and properties of some vegetable fibres (1986)
    Springer
    Journal of materials science 21 (1986), S. 57-63 
    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 mechanical properties of palmyrah and talipot fibres have been evaluated. Like other natural fibres, these fibres were also found to be viscoelastic in nature. The variation of the initial modulus (YM), ultimate tensile strength (UTS) and elongation (%) values were determined as a function of fibre fineness, test length and speed of testing. Change in test length from 10 to 100 mm palmyrah fibres produces a decrease in UTS from 220 to 161 MN m−2. Such variations were not observed in the case of talipot fibres except at low test length. The observed results have been explained in the light of the structural characteristics of these fibres namely chemical constituents espiral angle, number of defect centres, cell sizes, etc.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01144699
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  • 7
    Electronic Resource
    Electronic Resource
    Coating structure of metal-coated carbon fibres (1980)
    Springer
    Journal of materials science 15 (1980), S. 1860-1863 
    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/BF00550608
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  • 8
    Electronic Resource
    Electronic Resource
    Electrical resistivity and dielectric strength of plant fibres (1981)
    Springer
    Journal of materials science 16 (1981), S. 1719-1726 
    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/BF00553994
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  • 9
    Electronic Resource
    Electronic Resource
    The cementation technique for coating carbon fibres (1979)
    Springer
    Journal of materials science 14 (1979), S. 592-598 
    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 A tow of carbon fibres was coated with copper, nickel and cobalt by the cementation process. Conditions were optimized to obtain continuous, uniform and adherent coatings on three types of carbon fibres. The surface of the carbon fibres was activated by heating in vacuum at 700° C for about 15 min. The fibres were suspended in an aqueous solution of metal (Cu, Ni, Co) salt which also contained glacial acetic acid. To the solution a displacing agent such as Mg, Al, Zn or Fe was added. The metal was displaced from the solution and plated onto carbon. The thickness of the coating was dependent on the metal salt solution concentration and concentration of the surface activator (glacial acetic acid) in the solution. The appearance (dullness or brightness) of the metal coating was dependent on the concentration of the activator and the amount of displacer metal added. Mechanical testing of the single fibres indicated that the strength and modulus of the coated fibres was dependent on the coating thickness. In general, an increase in the coating thickness decreased the mechanical properties of the coated fibres. The coated fibres were introduced into an aluminium matrix successfully by the vacuum-infiltration technique to obtain composites with a uniform distribution of fibres.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00772718
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  • 10
    Electronic Resource
    Electronic Resource
    Mechanical behaviour of coir fibres under tensile load (1981)
    Springer
    Journal of materials science 16 (1981), S. 905-914 
    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 Stress-strain curves of coir fibres have been determined. Mechanical properties including initial modulus, strength and percentage elongation of coir fibres have been evaluated as functions of retting treatment (during retting the coconut husks are soaked in saline water for a period of about six months to facilitate the extraction of fibres presumably due to a bacterial process), fibre diameter, gauge length and strain rate. No significant differences in mechanical properties were observed between retted and unretted fibres. The strength and percentage elongation seem to increase for both retted and unretted fibres up to a fibre diameter of 0.2×10−3 m whereafter they remain almost constant. On the other hand, moduli seem to decrease with increase in diameter of the fibre. The observed modulus values and percentage elongation have been related to microfibrillar angle. Observed strength values have been explained on the basis of structural changes occurring with an increase in the diameter of the fibre. Scanning electron/microscope studies have indicated that the failure of the fibre is due to the fracture of the cells themselves accompanied by the uncoiling of microfibrills. There is no appreciable variation in strength and percentage elongation with strain rates for any one diameter of the fibre. On the other hand, with increase in gauge length, a decrease in both strength and percentage elongation at break has been observed. These have been attributed to an increase of probability of defects and localized deformation and gentle necking, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00542734
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