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  • 11
    Electronic Resource
    Electronic Resource
    Significance of Labrador Sea and Baffin Bay Waters for growth of the Laurentide Ice Sheet (1987)
    Oxford, UK : Blackwell Publishing Ltd
    Polar research 5 (1987), S. 0 
    Details
    ISSN: 1751-8369
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Geosciences
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1751-8369.1987.tb00575.x
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  • 12
    Electronic Resource
    Electronic Resource
    LEFT AXIS DEVIATION: ITS RELATION TO EXPERIMENTALLY INDUCED LESIONS OF THE ANTERIOR LEFT BUNDLE BRANCH SYSTEM IN CANINE AND PRIMATE HEARTS (1965)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 127 (1965), 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.1749-6632.1965.tb49404.x
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  • 13
    Electronic Resource
    Electronic Resource
    NATURALLY-OCCURRING ATHEROSCLEROSIS IN BIRDS (1965)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 127 (1965), 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.1749-6632.1965.tb49435.x
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  • 14
    Electronic Resource
    Electronic Resource
    Predicting Crawfish Molting with Machine Vision (1995)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of the World Aquaculture Society 26 (1995), S. 0 
    Details
    ISSN: 1749-7345
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: The objective of this project was to develop a vision system that could predict when crawfish will molt. Different sections of the crawfish shell were examined to determine how the color changed as the time of molting approached. A strip on the tail section of the crawfish showed the greatest, most consistent color change. The average red/green × red/blue ratio decreased for every crawfish as the molting time approached. Using this ratio as a predictor, it was possible to predict the molting of a crawfish within 3 d with an accuracy greater than 80%. The limitation on accuracy was primarily the result of the large variations in natural shell color among the crawfish.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-7345.1995.tb00251.x
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  • 15
    Electronic Resource
    Electronic Resource
    Resources, Knowledge and Influence: The Organizational Effects of Interorganizational Collaboration* (2003)
    108 Cowley Road, Oxford OX4 1JF, UK : Blackwell Publishing Ltd
    Journal of management studies 40 (2003), S. 0 
    Details
    ISSN: 1467-6486
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Notes: Inter-organizational collaboration has been linked to a range of important outcomes for collaborating organizations. The strategy literature emphasizes the way in which collaboration between organizations results in the sharing of critical resources and facilitates knowledge transfer. The learning literature argues that collaboration not only transfers existing knowledge among organizations, but also facilitates the creation of new knowledge and produce synergistic solutions. Finally, research on networks and interorganizational politics suggests that collaboration can help organizations achieve a more central and influential position in relation to other organizations. While these effects have been identified and discussed at some length, little attention has been paid to the relationship between them and the nature of the collaborations that produce them. In this paper, we present the results of a qualitative study that examines the relationship between the effects of interorganizational collaboration and the nature of the collaborations that produce them. Based on our study of the collaborative activities of a small, nongovernmental organization (NGO) in Palestine over a four-year period, we argue that two dimensions of collaboration – embeddedness and involvement – determine the potential of a collaboration to produce one or more of these effects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/1467-6486.00342
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  • 16
    Electronic Resource
    Electronic Resource
    Aluminum enhancement of plant growth in acid rooting media. A case of reciprocal alleviation of toxicity by two toxic cations (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 88 (1993), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The generally rhizotoxic ion Al3+ often enhances root growth at low concentrations. The hypothesis that Al3+ enhances growth by relieving H+ toxicity was tested with wheat seedlings (Triticum aestivum L.). Growth enhancement by Al3+ only occurred under acidic conditions that reduced root elongation. Al3+ increased cell membrane electrical polarity and stimulated H+ extrusion. Previous investigations have shown that Al3+ decreases solute leakage at low pH and that the alleviation of H+ toxicity by cations appears to be a general phenomenon with effectiveness dependent upon charge (C3+〉C2+〉Cl+). Alleviation of one cation toxicity by another toxic cation appears to be reciprocal so that Al3+ toxicity is relieved by H+. It has been argued previously that this latter phenomenon accounts for the apparent toxicity of ALOH2+ and Al(OH)+2. Reduction of cell-surface electrical potential by the ameliorative cation may reduce the cell-surface activity of the toxic cation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1993.tb01380.x
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  • 17
    Electronic Resource
    Electronic Resource
    Apparent phytotoxicity of mononuclear hydroxy-aluminum to four dicotyledonous species (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 79 (1990), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: It has long been assumed that Al3+ is an important rhizotoxic ion in acid soils around the world, but the toxicity of Al3+ relative to mononuclear hydroxy-Al [AlOH2+ and Al(OH)+2] has been examined in detail only for an Al-sensitive wheat variety (Triticum aestivum L. cv. Tyler). That plant appears to be sensitive to Al3+ but not to AlOH2+ and Al(OH)+2. New experiments, and reanalyses of previously published experiments, provide evidence that dicotyledonous species may be sensitive to mononuclear hydroxy-Al and that Al3+ may be nontoxic, or less toxic, to those plants. Despite these consistently measured differences between wheat and the dicotyledons, the determination of relative toxicities (Al3+ vs mononuclear hydroxy-Al) may be an intractable problem. Because of hydrolysis equilibria, (AlOH2+) and (Al(OH)+2) are equivalent to (Al3+)k1(H+)−1 and (l3+)k2(H+)−2, respectively, in which k1 and k2 are the first and second hydrolysis constants (braces denote activities). Thus, any expression of root elongation as a function of mononuclear hydroxy-Al can be alternatively expressed as a function of (Al3+) and (H+). Toxicity attributed to mononuclear hydroxy-Al may actually be Al3+ toxicity that increases as pH rises (i.e. Al3+ toxicity ameliorated by H+).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1990.tb06743.x
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  • 18
    Electronic Resource
    Electronic Resource
    Non-phytotoxicity of the aluminum sulfate ion, AlSO+4 (1987)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 71 (1987), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Aluminum is a phytotoxic element in many soils and occurs in a variety of chemical species. In order to determine whether AlSO+4 is toxic, seedlings of wheat (Triticum aestivum L. cv. Tyler) and red clover (Trifolium pratense L. cv. Kenland) were transferred to solutions containing controlled activities of Al3+, AlSO+4, Na+ and Ca2+. Root elongation was inhibited by Al3+ (or mononuclear hydroxy-Al species that are in equilibrium with Al3+), but not by AlSO+4. We assumed a formation constant (KAlSO+4= {AlSO+4}/[{Al3+} {SO2-4}]; braces indicate activities} of 103.2 for AlSO+4 in the computation of ionic activities, but use of KAlSO+4 values ranging from 102.8 to 103.6 had very little effect on the computed toxicities of Al3+ and AlSO+4. Sulfate did not promote the formation of polynuclear Al complexes in our experiments. A practice in studies of Al phytotoxicity has been to attribute toxicity to mononuclear Al, but now it would seem advisable to exclude AlSO+4. That AlSO+4 is non-toxic, or is at least 10-fold less toxic than Al3+, has implications for the physiology of Al toxicity and for the use of sulfate salts in experimental work and in agriculture.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1987.tb02869.x
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  • 19
    Electronic Resource
    Electronic Resource
    A Comparison of Sorption Coefficients Determined by Batch, Column, and Box Methods on a Low Organic Carbon Aquifer Material (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Ground water 29 (1991), S. 0 
    Details
    ISSN: 1745-6584
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geosciences
    Notes: Results of three independent experimental methods for determination of sorption coefficients were compared on sieved aquifer material samples from Columbus AFB, Columbus, Mississippi. These aquifer materials contained 〈0.1% organiccarbon, and sorption coefficients for naphthalene ranged from 0.06 to 0.20 I/kg. There was low correlation between organic carbon contents and sorption coefficients. Good agreement was found among sorption coefficients measured by batch, dynamic column, and dynamic box methods. Similarity of the coefficients was attributed to measured fast sorption kinetics and to linearity of isotherms observed for naphthalene sorption on Columbus aquifer material. Results indicate that channeling, wall and end effects, and particle loss were insignificant in the dynamic systems. Since laboratory sorption coefficient measurements were found impractical on whole sand-gravel aquifer samples, an equation is proposed to convert laboratory measured sorption coefficients on the separated sand (〈2 mm) fraction to sorption coefficients on wholesand-gravel aquifer materials.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1745-6584.1991.tb00578.x
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  • 20
    Electronic Resource
    Electronic Resource
    Nucleotide sequence and expression of the Pseudomonas aeruginosa algF gene controlling acetylation of alginate (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Molecular microbiology 9 (1993), S. 0 
    Details
    ISSN: 1365-2958
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Colonization of the cystic fibrosis lung by Pseudomonas aeruginosa is greatly facilitated by the production of an exopolysaccharide called alginate. In this study we determined the nucleotide sequence of an alginate modification gene, algF, which controls the addition of acetyl groups to alginate. Expression of algF using a T7 promoter-expression system showed that algF codes for a 24.5 kDa polypeptide (predicted size 22 832 Da) that is processed to 19.5 kDa. The N-terminus of the processed polypeptide matched the predicted amino acid sequence of AlgF starting at Asp-29. An algF mutant failed to produce alginate owing to a polar effect on the downstream algA gene. Although the algA gene, provided in trans, restored synthesis of alginate, the alginate was non-acetylated. We show that a plasmid containing both the algF and algA gene complements the alginate acetylation defect of the algF mutant strain.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2958.1993.tb01232.x
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