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  • 1
    Electronic Resource
    Electronic Resource
    Expression of the Human Mucosal Lymphocyte Antigen, HML-1, by T Cells Activated with Mitogen or Specific Antigen In Vitro (1995)
    Oxford, UK : Blackwell Publishing Ltd
    Scandinavian journal of immunology 41 (1995), S. 0 
    Details
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Expression of the human mucosal lymphocyte antigen, HML-1 (CD103), recently identified as a novel äEβ7 integrin, was studied on peripheral blood lymphocytes activated with mitogen or specific antigen. HML-1 was up-regulated on PHA activated T-lymphoblasts cultured in 100IU/ml interleukin-2 (IL-2), reaching a peak of 〉50% positive cells at day 7, and expression was maintained at this level throughout the 28-day culture period. Following a transient decrease in the percentage of L-selectin cells, expression of this molecule was maintained on most PHA T-lymphoblasts. Cells activated by purified protein derivative of M. tuberculosis (PPD) or in mixed lymphocyte culture also up-regulated and maintained HML-1 expression for 14 days. In contrast, in all cases the percentage of CD25+ cells rose initially but subsequently declined over the same time periods. When freshly isolated cells from tonsil, spleen, mesenteric lymph node and lung were analysed, only lung contained significant numbers (39 × 6%) of HML-1+ cells. In both freshly isolated and activated cell populations the great majority of HML-1+ cells co-expressed CD8 although some HML-1+CD8− cells were also present. Production of TGF-β1 peaked early during T-lymphoblast and MLR cultures and was not related to induction of HML-1 expression. Immunoprecipitation studies showed that the HML-1 molecule expressed on 10-day PHA T-lymphoblasts was indistinguishable from that found on intestinal intraepithelial lymphocytes and that no α4β7 integrin was expressed by these cells. Although HML-1 expression is essentially restricted to mucosal leucocytes in vivo, these experiments show that it is readily induced and maintained along with co-expression of L-selectin following CD8+ T-lymphocyte activation in vitro.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3083.1995.tb03607.x
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  • 2
    Electronic Resource
    Electronic Resource
    Establishment of Sweet Birch on Surface Mine Spoil as Influenced by Mycorrhizal Inoculation and Fertility (2004)
    Oxford, UK; Malden , USA : Blackwell Science Inc
    Restoration ecology 12 (2004), S. 0 
    Details
    ISSN: 1526-100X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Induced mycorrhization of sweet birch (Betula lenta L.) by Pisolithus tinctorius (Pers.) Coker & Couch, as influenced by substrate fertility, was evaluated for its effects on seedling growth and physiology. Following a brief period in seed flats, seedlings were transplanted to mine spoil where they resided for 30 months, and three nutrition regimes were imposed throughout the study by application of differing nutrient solution concentrations. High fertility suppressed mycorrhizal formation by P. tinctorius but promoted that of other mycobionts. Pisolithus mycorrhization induced substantial aboveground and belowground growth as indicated by dimensions and mass for the former and mass and length for the latter but favoring root over shoot growth overall. Furthermore, these mycorrhizae were frequently able to compensate for the growth stimulation of higher nutrient additions. Measurements of xylem pressure potential and soil water potential indicated that water uptake was enhanced by P. tinctorius during simulated drought episodes of two durations and in subsequent recovery periods. Inoculated seedlings had higher foliar concentrations of critical nutrients, especially N, and lower concentrations of potentially phytotoxic metallic elements, particularly Mn, than uninoculated seedlings, although the latter response was absent in high fertility. Spoil analyses clearly revealed the influence of the nutrition regimes but also the effects of seedling uptake on substrate chemistry, and reinforced the findings of the foliar analysis concerning suppression of metal uptake by P. tinctorius. Collectively, these results suggest that P. tinctorius can provide sweet birch an array of physiological benefits that will permit this tree species to flourish on harsh substrates such as surface mine spoils without heavy application of chemical fertilizers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1061-2971.2004.00255.x
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  • 3
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    B. McGinn, "The Calabrian abbot: Joachim of Fiore in the history of Western thought" (Book Review) (1989)
    The Hague : Periodicals Archive Online (PAO)
    International journal for the philosophy of religion. 25:2 (1989) 125 
    Details
    ISSN: 0020-7047
    Topics: Philosophy , Theology and Religious Studies
    Notes: Book reviews
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:d538-1989-025-02-000009
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  • 4
    Electronic Resource
    Electronic Resource
    Post extrusion swelling of polyethylene (1963)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 7 (1963), S. 1661-1672 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: When polymers are extruded from a reservoir through a capillary the extrudate diameter is generally greater than the capillary diameter. Experiments with polyethylene show that the extent of this extrudate swelling depends, at constant shear stress, on the length-to-radius ratio of the capillary even though the viscosity does not. Consideration of this result at various shear stresses indicates that the degree of swelling depends on the total shear strain imposed on the melt. The same factor also governs the amount of extrudate distortion observed when melt fracture occurs.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1963.070070508
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