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  • 1
    Electronic Resource
    Electronic Resource
    Physicochemical Characteristics of 18 Cultivars of Nigerian Cowpeas (V. uniguiculafa) and Their Cooking Properties (1986)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 51 (1986), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Eighteen cultivars of cowpeas (V. unguiculata) were analyzed for cooking time, swelling capacity, leached solid, percent seed coat, seed density, amylose, tannins, proteins, and soluble sugars. The physicochemical characteristics varied with the seed coat color, the hilum color, and the skin texture. The cooking time was positively correlated to protein, seed density, percent seed coat, swelling capacity and leached solids, and negatively correlated to the levels of amylose, soluble sugars and tannins. There were significant correlations (p 〈 0.05) between sugars and swelling capacity, protein and seed density; and seed density and swelling capacity. The mean percent seed coat was significantly different (p 〈 0.05) between the varieties with wrinkled seed coats and those with smooth seed coats.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1986.tb13840.x
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  • 2
    Electronic Resource
    Electronic Resource
    Crystal data for ternary compounds of the system Cu–As2Se3 (1987)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 20 (1987), S. 323-323 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: Structural studies of polycrystalline CuAsSe2, Cu3AsSe4 and Cu3AsSe3 are reported. These were found to be cubic with space group Pm{\bar 3}m and lattice parameters as follows: (1) CuAsSe2: a = 5.513(4) Å, V = 167.47(1) Å3, Z = 2; Dm = 5.56(6), Dx = 5.88 g cm−3. (2) Cu3AsSe4: a = 5.530(5) Å; V = 169.11(2) Å3; Z = 1; Dm = 5.51(5), Dx = 5.75 g cm−3. (3) Cu3AsSe3: a = 5.758(9) Å, V = 190.87(3) Å3, Z = 1, Dm = 5.03(9), Dx = 4.45 g cm−3. X-ray diffraction data using a Rigaku DMAX-IIIA diffractometer and Cu Kα radiation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889887086588
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  • 3
    Electronic Resource
    Electronic Resource
    Anticholinesterase properties of methamidophos and acephate in insects and mammals (1987)
    Springer
    Bulletin of environmental contamination and toxicology 38 (1987), S. 131-138 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01606570
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  • 4
    Electronic Resource
    Electronic Resource
    Population characteristics of green tiger prawns, Penaeus semisulcatus, in Kuwait waters prior to the Gulf War (1996)
    Springer
    Hydrobiologia 337 (1996), S. 37-47 
    Details
    ISSN: 1573-5117
    Keywords: exploitation rate ; recruitment ; mortality ; growth ; sex ratios
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Monthly length-frequency data of green tiger prawns from April 1985 to August 1990 were analyzed to estimate the von Bertalanffy growth curves and related parameters. The mean asymptotic carapace lengths (L ∞) and growth constants (K) over 5 seasons were 36.6 mm and 1.6 yr−1 for males and 51.2 mm and 1.7 yr−1 for females, respectively. Annual total mortality rates (Z) from 1985/86 to 1989/90 ranged from 2.7 to 6.5 yr−1 for males and from 2.8 to 6.8 yr−1 1 for females. The mean exploitation rates calculated using the mean natural mortality rates (M) of 2.5 yr−1 for males and 2.4 yr−1 for females showed that the male green tiger prawns in Kuwait waters were under exploited, whereas the catch of females was very close to the sustainable yield. Chi-square tests indicated that the sex ratio was close to one for adults (CL ≽ 26 mm), but significantly favoured males for recruits (CL 〈 26 mm). A major recruitment was detected from June/July in all seasons and a minor recruitment in some seasons in August/September. The relative yield-per-recruit (Y'/R) reached the optimum at the length-at-first capture (L c) of 25 mm CL for males, and increased as L c increased for females. The observed mean L c, values were 23.4 mm for both males and females. The Y'/R under the current exploitation level is close to the maximum sustainable yield for females, but lower for males. More fishing effort could be exerted to exploit males, but doing so may not be biologically or commercially possible with current trawling practices.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00028505
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  • 5
    Electronic Resource
    Electronic Resource
    The collapsed cubic isoparametric element as a ingular element for crack probblems (1978)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 12 (1978), S. 1727-1742 
    Details
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: For the 12-node quadrilateral isoparametric elements, it is shown that the inverse square root singularity of the strain field at the crack tip can be obtained by the simple technique of collapsing the quadrilateral elements into triangular elements around the crack tip and placing the two side nodes of each side of the triangles at 1/9 and 4/9 of the length of the side from the tip. This is analogous to placing the mid-side nodes at quarter points in the vicinity of the crack tip for the quadratic isoparametric elements. The advantages of this method are that the displacement compatibility is satisfied throughout the region and that there is no need of special crack tip elements. The stress intensity factors can be accurately obtained by using general purpose programs having isoparametric elements such as NASTRAN.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/nme.1620121110
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  • 6
    Electronic Resource
    Electronic Resource
    Quadratic and cubic transition elements (1981)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 17 (1981), S. 1397-1406 
    Details
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: Quadratic and cubic quadrilateral isoparametric elements are investigated for use as transition elements for use a crack tip elements. Computations for a single element are explicitly carried out using a symbolic algebraic manipulation program and in addition to the desired square root singularity, additional singularities are revealed. Cubic transitional elements were used for a double-edge crack problem and only marginal improvement is found for a well-laid out grid.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/nme.1620170908
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  • 7
    Electronic Resource
    Electronic Resource
    A new fracture-toughness test method for thick-walled cylinder material (1972)
    Springer
    Experimental mechanics 12 (1972), S. 184-189 
    Details
    ISSN: 1741-2765
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract A new method for measuring the plane-strain fracture toughness of the material from a thick-walled cylinder is presented. This method utilizes a notched, “C”-shaped test specimen, pin loaded in tension. This specimen has the advantage of most efficiently utilizing the available material to obtain the maximum possible triaxial constraint at the crack tip. Stress-intensity-factor calibrations for this specimen were obtained by two independent experiments. These are a compliance test, as originally proposed by Irwin, and a fatigue-crack-growth test, as suggested by James and Anderson. Very good agreement was obtained between the results of these two experiments. A stress-intensity calibration for a similar geometry was also obtained using a finite-element analysis and a method developed by Kobayashi to determine stress-intensity factors from finite-element results. The results of this method appear to be low by about 10 percent. Comparative fracture-toughness tests of material from a 2-in.-thick plate of special aircraft quality, 4340 steel, were conducted using the proposed new test method and the ASTM standard bend specimen. These results agreed within 2 percent.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02330271
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