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  • 1
    Electronic Resource
    Electronic Resource
    Influence of species, cutting date and cutting interval on the fatty acid composition of grasses (2001)
    Oxford UK : Blackwell Science Ltd
    Grass and forage science 56 (2001), S. 0 
    Details
    ISSN: 1365-2494
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Two experiments were conducted to evaluate the effects of species, cutting date and cutting interval on the concentration of fatty acids in temperate grasses. The first experiment compared eight species, harvested in late autumn and summer. Levels of individual fatty acids were distinctive for some species, with low levels of C18:1 in Dactylis glomerata L. and high levels of C18:2 in Phleum pratense L. Differences in individual fatty acids could not be used to differentiate fescues and ryegrasses. However, fatty acid profiles could be used to differentiate species when material was managed similarly (i.e. at the same cut). There were large species × cut interaction effects, showing that management factors will be as important as plant breeding in manipulating fatty acid levels. Cultivars belonging to one Lolium perenne L. gene pool were identified as having significantly higher α-linolenic acid and total fatty acids in late-season (November) material.The second experiment compared three ryegrass species over a growing season, with three or five cuts. All species had high concentrations of fatty acids and a high proportion of α-linolenic acid during vegetative growth (late April). Fatty acid levels declined markedly in all species after this date, recovering by autumn. Kunth Lolium multiflorum Lam. and Lolium × boucheanum had higher levels of total fatty acids and α-linolenic acid in the early and late season when compared with perennial ryegrass. Fatty acid levels (particularly C18:2 and C18:3) declined when the regrowth interval was extended from 20 to 38 d.These studies demonstrate opportunities to change the composition of ruminant products through breeding and management of grasses for altered levels of fatty acids.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2494.2001.00247.x
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  • 2
    Electronic Resource
    Electronic Resource
    Effects of a stay-green trait on the concentrations and stability of fatty acids in perennial ryegrass (2002)
    Oxford, UK : Blackwell Science Ltd
    Grass and forage science 57 (2002), S. 0 
    Details
    ISSN: 1365-2494
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Three experiments were conducted to evaluate the effect of a stay-green trait in perennial ryegrass (Lolium perenne) on concentrations of fatty acids as well as their susceptibility to peroxidation during wilting and to biohydrogenation by rumen bacteria. Fatty acid concentrations were recorded in stay-green and corresponding normal perennial ryegrass selection lines over eight cuts during 1998. There was a progressive increase in total fatty acid concentrations [from 20·8 to 34·6 g kg−1 dry matter (DM)] and the proportion of fatty acids as α-linolenic acid (from 0·62 to 0·70 g g−1) from early to late season. A second study compared fatty acid concentrations in stay-green and normal herbage that was wilted for up to 48 h. There was a loss of 0·2–0·3 g g−1 fatty acids during 48 h of wilting and a small reduction in the rate of loss of α-linolenic acid in stay-green perennial ryegrass compared with normal herbage (0·223 vs. 0·290 g g−1 lost after 48 h). Stay-green and normal perennial ryegrasses were offered to grazing lambs in a third study. Higher concentrations of trans-vaccenic acid and conjugated linoleic acid in plasma from lambs offered less mature grass in the pre-experimental period than during the experiment are considered to reflect a greater supply of precursor (linoleic acid). There were higher concentrations of conjugated linoleic (0·0070 vs. 0·0039 g l−1) and linoleic (0·092 vs. 0·070 g l−1) acids, without an increase in trans-vaccenic acid, in plasma from lambs grazing stay-green perennial ryegrass than normal perennial ryegrass. This suggests that the stay-green trait affected the rate of degradation of fatty acids in the rumen. These results demonstrate the potential for obtaining proportionately large differences in fatty acid profiles of ruminant products by altering grassland management.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2494.2002.00336.x
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  • 3
    Electronic Resource
    Electronic Resource
    The effect of additives on the ensilage of forage of differing perennial ryegrass and white clover content (1995)
    Oxford, UK : Blackwell Publishing Ltd
    Grass and forage science 50 (1995), S. 0 
    Details
    ISSN: 1365-2494
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Pure perennial ryegrass or perennial ryegrass/white clover mixtures (70:30 and 40:60 on a fresh-matter basis) were ensiled in laboratory silos either untreated or alter treatment with freshly cultured Lactobacillus (Lb.) plantarun or freshly cultured Lb. plantarum plus Lactococcus (Lc.) lactis. freeze-dried Lb. plantarum or freeze-dried Lb. Plantarum plus sodium formate, sodium formate or formic acid. The effect of these additives on silage fermentation characteristics and quality of the resultant silages was examined. There were significant interactions between treatments and herbages for all silage quality parameters measured, except for acetic acid concentration. The influence of additives on the final pH of all silages was small but statistically significant. Lactic acid concentration was not directly related to herbage mixture, overall mean values ranging from 118 to 120 ± 1.5 g kg−1 dry matter (DM), but wider variation was seen between treatments for individual herbage mixtures. Acetic acid concentrations were significantly (P〈0·001) affected by herbage mixture ensiled, increasing linearly as clover content increased from zero to 60%. Untreated control and formic acid-treated silages contained significantly (p〈0·001) higher acetic acid concentrations than those treated with other additives. Silage ammonia N concentrations were significantly (p〈0 001) influenced by herbage mixture. Lowest ammonia N concentrations (〈 50 g kg−1 DM) were observed in silages that had been treated with formic acid, freshly cultured Lb. plantarum or Lb. plantarum plus Lc. lactis. The fraction 1 leaf protein (FILP) contents of silages were significantly (P 〈0·001) affected by both treatment and herbage mixture, with consistently and significantly higher values found in freshly cultured inoculant-treated silages. A poor correlation (r2= 0·12) existed between ammonia N and FILP in all silages. The inclusion of up to 60% white clover in the ensiled herbage did not adversely affect final silage quality. However, additive treatment markedly influenced the residual FILP content of silages, those treated with freshly cultured inoculants having the highest values.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2494.1995.tb02320.x
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  • 4
    Electronic Resource
    Electronic Resource
    Randomized comparison of atenolol and placebo in the treatment of anxiety: A double-blind study (1985)
    Springer
    European journal of clinical pharmacology 28 (1985), S. 109-110 
    Details
    ISSN: 1432-1041
    Keywords: anxiety ; atenolol ; β-blockers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary In a randomized double-blind prospective between-patients trial in patients presenting with primary anxiety, atenolol significantly improved mean values on the Hamilton rating scale at two and four weeks when compared with placebo. There was also a significant improvement in affective symptoms at 28 days for atenolol when compared with placebo.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00543722
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  • 5
    Electronic Resource
    Electronic Resource
    Stress intensification due to an edge crack in an anisotropic elastic solid (2000)
    Springer
    International journal of fracture 106 (2000), S. 47-56 
    Details
    ISSN: 1573-2673
    Keywords: Anisotropic ; edge crack ; generalized plane strain ; integral transforms
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Integral transform techniques are used to determine the stress intensity factors of a crack at the edge of an anisotropic elastic half space under generalized plane strain conditions. Numerical results are given for a carbon fibre reinforced epoxy in uniaxial tension.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007694706385
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  • 6
    Electronic Resource
    Electronic Resource
    Synthesis of bismuth-based superconductors using poly(acrylic acid) (1993)
    Springer
    Journal of materials science 12 (1993), S. 461-463 
    Details
    ISSN: 1573-4811
    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/BF00452794
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  • 7
    Electronic Resource
    Electronic Resource
    Observations of extrusion-induced damage of metal-matrix composites (1993)
    Springer
    Journal of materials science 12 (1993), S. 647-649 
    Details
    ISSN: 1573-4811
    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/BF00465579
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  • 8
    Electronic Resource
    Electronic Resource
    The stress intensity factor of a Griffith crack which is opened by a thin symmetric wedge (1971)
    Springer
    Journal of elasticity 1 (1971), S. 29-35 
    Details
    ISSN: 1573-2681
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Description / Table of Contents: Zusammenfassung In dieser Arbeit benützt der Autor eine neuere Entwicklung in der Theorie dreifacher Integralgleichungen, um Formeln für den Spannungsintensitätsfaktor und die Form eines Griffithschen Risses abzuleiten, welcher durch einen dünnen symmetrischen Keil geöffnet wird. Der Gebrauch dieser Formeln wird dann durch Betrachtung zweier Sonderfälle erläutert.
    Notes: Abstract In this paper, the author makes use of a recent development in the theory of triple integral equations to derive formulae for the stress intensity factor and crack shape of a Griffith crack which is opened by a thin symmetric wedge. The use of these formulae is then illustrated by a consideration of two particular cases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00045697
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  • 9
    Electronic Resource
    Electronic Resource
    The longitudinal shear problem for an array of cracks at the edge of a circular hole in an infinite elastic solid (1976)
    Springer
    Journal of engineering mathematics 10 (1976), S. 305-312 
    Details
    ISSN: 1573-2703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Technology
    Notes: Summary A Mellin-type transform technique reduces the longitudinal shear problem for a set of cracks at the edge of a circular hole in an infinite elastic solid to that of solving a system of integral equations. The stress intensity factors and crack formation energy are calculated. Three special cases are considered in detail and graphical results given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01535566
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  • 10
    Electronic Resource
    Electronic Resource
    The solution of a torsion problem by finite Mellin transform techniques (1973)
    Springer
    Journal of engineering mathematics 7 (1973), S. 97-100 
    Details
    ISSN: 1573-2703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Technology
    Notes: Summary In this paper the author makes use of a recent development in the theory of finite Mellin transforms to find formulae for the stress intensity factors and crack formation energy of a radial system of edge cracks in a circular elastic cylinder under torsion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01535354
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