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  • 1
    Electronic Resource
    Electronic Resource
    Simulation of soil water retention using random fractal networks (1997)
    Oxford, UK : Blackwell Publishing Ltd
    European journal of soil science 48 (1997), S. 0 
    Details
    ISSN: 1365-2389
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: The derivation of pore size distributions from the soil water retention characteristic is complicated by the influence of the connectivity of the pore space on drainage. We examine this issue in the context of a random fractal pore network model. A two-dimensional one-parameter model simulates the drainage of water from an initially saturated pore network, explicitly accounting for the complex pore interactions which exist over a range of scales within the network. A parameter range is identified over which pore connections significantly hinder the advance of air into the network. The results demonstrate that connectivity between pores in a random structure can affect the drainage to an extent that in general it is not possible to obtain an accurate measure of the pore size distribution from the water retention data. These results, together with findings based on closely related multiscale network models, show that one should use with caution water retention models derived from fractal structures and based solely on pore size distributions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2389.1997.tb00563.x
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  • 2
    Electronic Resource
    Electronic Resource
    Water retention models for fractal soil structures (1996)
    Oxford, UK : Blackwell Publishing Ltd
    European journal of soil science 47 (1996), S. 0 
    Details
    ISSN: 1365-2389
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: A review of water retention functions based upon fractal soil structures is presented. We consider the modelling approach for a fractal fabric, a fractal pore boundary and a fractal pore space, identifying the latter case as one of particular complexity. In each case, the water retention function is derived from the pore volume distribution arising from the structural model in question. We examine published models and highlight problems, namely lack of generality and inconsistency with the assumed fractal structure. The models considered in this paper do not account for the effects of pore connectivity, and as such their validity as a necessary condition for the existence of fractal structure is questionable.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2389.1996.tb01365.x
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  • 3
    Electronic Resource
    Electronic Resource
    Diffusion from instantaneous sources of differing geometries (1994)
    Oxford, UK : Blackwell Publishing Ltd
    European journal of soil science 45 (1994), S. 0 
    Details
    ISSN: 1365-2389
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: The effects of geometry upon diffusion from instantaneous sources is considered. Although surface area is important initially, it is the square of the volume of the source which determines flux from the source at large times. This asymptotic shape independence is demonstrated for spherical and cuboidal sources.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2389.1994.tb00533.x
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  • 4
    Electronic Resource
    Electronic Resource
    Letter to the Editor (1970)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 35 (1970), 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
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1970.tb12350.x
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  • 5
    Electronic Resource
    Electronic Resource
    A Comparison of Solvent and Thermal Techniques for Determining the Fat Content of Ground Beef (1967)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 32 (1967), 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: SUMMARY— Results obtained by a thermal extraction procedure for determining the fat content of fresh ground beef were found to correlate significantly (1% level) with results obtained by the official AOAC solvent extraction procedure. The fat levels investigated ranged between 14 and 29%. As the amount of sample grinding increased, the fat variation within thermal extraction replications decreased, while the differences between the thermal and solvent extracted fat became larger.Linear regression between the two methods contained significant error in certain areas of the fat range tested. The fourth order polynomial provided the best fit curve between the solvent and thermal extraction data for thermal samples ground once through a plate having g-in. diameter holes and twice through a plate having holes 1/8-in. in diameter. The thermal extraction method, being adequately reproducible, rapid, and economical, provides a valuable tool to the food industry in control procedure and to the Armed Forces in its quality assurance tests.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1967.tb00822.x
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  • 6
    Electronic Resource
    Electronic Resource
    Nutritional and Hormonal Regulation of the Activity State of Hepatic Branched-Chain α-Keto Acid Dehydrogenase Complex (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 573 (1989), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1989.tb15007.x
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  • 7
    Electronic Resource
    Electronic Resource
    Complete mechanical impedance increases the turgor of cells in the apex of pea roots (1996)
    Oxford, UK : Blackwell Publishing Ltd
    Plant, cell & environment 19 (1996), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: In this paper we describe an experimental approach which allows turgor (p) in an impeded root to be measured without the need to remove the root from the impeding environment. The maximum axial growth pressure (σmax) generated by completely impeded pea (Pisum sativum L.) roots was measured using a novel apparatus incorporating a force transducer. The apparatus was designed so that it was possible to gain access to the impeded root with the microcapillary of a pressure probe and so obtain in situ measurements of P. Turgor in cells in the apical region of impeded roots was 0.78 MPa, compared with 0.55 MPa in unimpeded roots. In impeded roots, σmax was 0.52 MPa, showing that the pressure component resulting from cell wall tension (W, where W=P–σ) decreased from 0.55 to 0.26 MPa as the roots became impeded. When impeded roots were removed from the apparatus, there was no decrease in P over the following 90 min. Impedance did not cause P to change in the non-elongating part of the roots further from the apex.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3040.1996.tb00217.x
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  • 8
    Electronic Resource
    Electronic Resource
    The application of fracture mechanics to crack propagation in dry soil (1995)
    Oxford, UK : Blackwell Publishing Ltd
    European journal of soil science 46 (1995), S. 0 
    Details
    ISSN: 1365-2389
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: The application of fracture mechanics to dry soil has been investigated. Discs moulded from sand and kaolinite pastes, into which artificial tension cracks were introduced, were fractured using the indirect tension technique. The basic linear elastic fracture mechanics (LEFM) approach was found inadequate to describe the observed relation between the imposed flaw size and the failure stress. Fracture mechanics have been extended to dry soil by adding a crack length increment, Δc, to the imposed flaw size, c, to account for energy dissipation by processes other than the creation of new surfaces. This increment seems to represent the effective size of a ‘process zone’ ahead of the crack tip in which energy is dissipated by micro-cracking and internal friction. Further experiments done using specimens containing two collinear cracks separated by a variable distance and using samples of different size showed that the two cracks behaved effectively as one for separation distances less than about Δc. For specimen sizes much bigger than Δc fracture testing was found to be scale-invariant for geometrically similar specimens.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2389.1995.tb01355.x
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  • 9
    Electronic Resource
    Electronic Resource
    A Comparative Index for Quantifying Growth in Length of Fish (1979)
    Oxford, UK : Blackwell Publishing Ltd
    Aquaculture research 10 (1979), S. 0 
    Details
    ISSN: 1365-2109
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Standard growth curves for bream, roach, chub and dace were constructed using published data for the British Isles. Comparison of length for age of fish from any habitat with these standard curves enables a growth index to be calculated where slow, normal and fast growth give indices less than, equal to and greater than 100, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2109.1979.tb00270.x
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  • 10
    Electronic Resource
    Electronic Resource
    High Temperature Drying: Effect on Spaghetti Properties (1981)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 46 (1981), 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: The characteristics of spaghetti produced from two high temperature (HT) drying cycles, one featuring HT at the initial stages of drying (HT-A) and one featuring HT during the latter stages of drying (HT-B) were compared to spaghetti produced by low temperature (LT) drying. Both HT cycles had the advantage of greatly reduced drying time. In addition HT-A spaghetti exhibited much enhanced color intensity compared to LT spaghetti. Although HT-A spaghetti cooking properties were marginally inferior to LT spaghetti, cooking quality was still satisfactory. Spaghetti from HT-B was equal to or better than LT spaghetti in color quality while also exhibiting improved strand strength and superior cooking properties.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1981.tb04476.x
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