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  • 1
    Electronic Resource
    Electronic Resource
    Time-resolved x-ray diffraction station: X-ray optics, detectors, and data acquisition : International conference on synchrotron radiation instrumentation (1989)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 60 (1989), S. 2346-2349 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A new x-ray beamline has recently been built, and is now operational, on dipole magnet 2 of the Synchrotron Radiation Source (SRS) at Daresbury. This beamline takes 32 mrad of horizontal aperture from a central tangent point. The time-resolved x-ray diffraction (TRXD) Station 2.1, takes 17 mrad of horizontal aperture and is the central point of this paper. Beamline 2 has been realized as part of a SERC–MRC agreement.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1140765
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  • 2
    Electronic Resource
    Electronic Resource
    Electron Microscopy of Vulcanized Rubber Using Gelatine First-Stage Replicas (1957)
    [s.l.] : Nature Publishing Group
    Nature 179 (1957), S. 729-729 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Water-soluble polymers have been employed for the replication of rubber by several workers. Harris2 used a solution of gum arabic and glycerol, and gelatine has been used by Bromley and Downer (private communication). We have examined a number of other water-soluble materials. Ammonium ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/179729a0
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  • 3
    Electronic Resource
    Electronic Resource
    Effect of Cobaltic Oxide Pellets on the Vitamin B 12 Content of Ewes' Milk (1959)
    [s.l.] : Nature Publishing Group
    Nature 184 (1959), S. 1242-1242 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In the work reported here a flock of pregnant ewes, grazing pastures marginally cobalt-deficient for lambs, was divided into two groups. Ewes in one group were each given a pellet containing 90 per cent cobaltic oxide (described by Dewey et al.5). Ewes in the second group served as controls. ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1841242a0
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  • 4
    Electronic Resource
    Electronic Resource
    Vitamin B 12 and Cobalt Concentrations in Livers from Healthy and Cobalt-deficient Lambs (1958)
    [s.l.] : Nature Publishing Group
    Nature 182 (1958), S. 869-870 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Assessments of the cobalt status of pastures were based on a previously estimated minimal level considered necessary to satisfy the cobalt requirement of lambs1. The stage of deficiency for each group was assessed partly from pasture cobalt status but mainly from changes in weight or deaths. ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/182869b0
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  • 5
    Electronic Resource
    Electronic Resource
    Adhesion to skin (1985)
    Springer
    Journal of materials science 20 (1985), S. 3621-3630 
    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 modified adhesive peel test is described in which a spring is inserted between the test machine cross-head and the peeling strip. In tests using two pressure sensitive surgical adhesives (uncrosslinked elastomers) this “soft machine” gives results which differ significantly from those obtained with a conventional “hard machine”. In particular, when peeling energy is plotted against peeling velocity, the soft machine reveals a regime of low energy peeling and a transition to the normal high energy peeling. The transition behaviour has been studied as a function of adhesive thickness, cross-head speed and spring stiffness. The phenomena revealed by soft machine testing are interpreted in terms of variations in crack-tip radius caused by flow of the uncrosslinked rubber. The practical implication is that far more information can be obtained from soft machine tests than from conventional hard machine tests. The problem of oscillating peel force is also eliminated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01113769
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  • 6
    Electronic Resource
    Electronic Resource
    Radiation-induced crystallinity changes in polyethylene blends (1985)
    Springer
    Journal of materials science 20 (1985), S. 2839-2845 
    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 It was previously found that upon exposure to high energy radiation, linear polyethylenes experience an increase in the degree of crystallinity [1]. The increase continued monotonically with ageing time [2]. To gain a better understanding of these unexpected results the present paper examines the effects in physical blends of ultra-high molecular weight polyethelyne (UHMW PE) and conventional high density polyethylene (HDPE). No synergistic effects were observed in the blends, but the analysis of the thermal and tensile yield stress data provides some insight into the phenomenon. It provides support for the explanation involving radiation-induced chain-scission followed by recrystallization, and suggests that the chain-scission does not continue with time after initial irradiation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00553046
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  • 7
    Electronic Resource
    Electronic Resource
    Adhesion to skin (1987)
    Springer
    Journal of materials science 22 (1987), S. 2833-2841 
    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 energy of an adhesive bond can be factorized into two terms, one of which is a dimensionless loss function and the other, the true interfacial bonding energy,θ 0. Experimental techniques have been developed to effect a separation of these two terms and thus measureθ 0, but they are unsuitable for the pressure-sensitive adhesives used in surgical tapes and dressings. This is because these adhesives flow readily under load. This paper describes an extrapolation technique by which this problem can be resolved. Adhesive peel data are extrapolated both to zero peel velocity and zero load, to give a true threshold value for peeling energy which is independent of temperature. Values ofθ 0 are given for a natural-rubber based adhesive and substrates of glass and human skinin vivo. For glassθ 0 = 28J m−2 and for normal skinθ 0 ≃ 14J m-2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01086479
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  • 8
    Electronic Resource
    Electronic Resource
    Comment on “Subcritical crack growth, surface energy, fracture toughness, stick—slip and embrittlement” by D. Maugis (1986)
    Springer
    Journal of materials science 5 (1986), S. 679-680 
    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/BF01731550
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  • 9
    Electronic Resource
    Electronic Resource
    Spermatophores of the snail Neritina reclivata (1936)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 60 (1936), S. 191-209 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Differing from hitherto known spermatophores, these are found to have the form of a loop with a thick body and the slender ends twisted together.Also one end bears a spiral row of triradiate spicules, unique in being chitinoid secretions. Each is formed within a vacuole of a cell of a small gland found in the males. The ends of the spermatophores hold sperms, but the main mass consists of granules of problematical value. Spermatophores after discharge are stored up within the female, where remnants of them remain indefinitely.For the first time stages in the formation of spermatophores were found within the males. The head organ in the male is found to be more complex than hitherto known in this genus. A special head organ in the female is described for the first time in this family. An hypothesis is advanced as to the possible use of these male and female head organs in transfer of spermatophores. The suggestion is made that in this family the spermatophores and their organs of transfer and of storage may serve as generic characters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1050600110
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  • 10
    Electronic Resource
    Electronic Resource
    Certain reproductive organs in the Neritidae (1937)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 61 (1937), S. 525-561 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Descriptions and figures of the subordinate sex-organs are given for thirty species taken at random throughout the entire family.It is found: that the higher genera have organs not present in the lower; that they have a storage sac for mineral particles to be added to the secreted capsules within which the eggs will develop; that the anus is more or less fused to the mouth of the oviduct to allow of easy passage of the above materials from anus to oviduct; that spermatophores grade from simple elongated tubes of the lower to stout double tubes with various forms, with spicules, or with spirals, in the higher forms; that the sacs for holding the spermatophores may be simple, when the spermatophores are cast out after discharge, but are more evolved when spermatophores are to be permanently retained and digested; that while lower forms have no sex organs upon the head, peculiar organs occur in the higher genera, in one or both sexes.These organs have value as aids in classification of genera within the family Neritidae. The very marked coordination among these organs may be better understood when further observation reveals how they are used in sperm transfer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1050610307
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