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  • 1985-1989  (2)
  • Adirondacks  (1)
  • glycosaminoglycans  (1)
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  • 1985-1989  (2)
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Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Association of laminin with heparan and chondroitin sulfate-bearing proteoglycans in neurite-promoting factor complexes from rat schwannoma cells (1987)
    Springer
    Neurochemical research 12 (1987), S. 909-921 
    Details
    ISSN: 1573-6903
    Keywords: Extracellular matrix ; basal lamina ; Schwann cells ; glycosaminoglycans
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The present studies were undertaken to confirm the presence and identity of a putative proteoglycan associated with laminin in neurite-promoting factor complexes isolated from rat schwannoma cell conditioned medium. Sucrose density gradient centrifugation of the complex resolved two laminin-associated Na2[35S]O4-labeled peaks which were termed Pools A and B. Both pools had nearly all their [35S] cpms associated with glycosaminoglycan, contained heparan sulfate-proteoglycan core protein antigen and displayed a similarly high neurite promoting potency relative to their laminin contents. However, Pool A contained about twice as many [35S] cpms and twice as much proteoglycan core protein per laminin than Pool B. Seventy percent of Pool A cpms was associated with heparan sulfate and 30% with chondroitin sulfate whereas the inverse was true for Pool B. Treatment with heparitinase and/or chondroitinase ABC caused laminin in either pool to elute at lower salt concentrations from DEAE cellulose. In SDS-PAGE the [35S] cpms of both pools ran with the same mobility as laminin but could be separated from laminin under reducing conditions. The Pool A cpms remained at 900 KD and the Pool B cpms spread over the 200–900 KD range. By rotary shadowing electron microscopy, Pool B fractions contained primarily cross-shaped laminin images, often associated with proteoglycan-like images. Pool A fractions contained i) dense, aggregated images including intact laminin from which emanated proteoglycan-like strands, ii) circular images bearing globular domains and less commonly, iii) distorted cross-shaped laminin-like images. These studies support the existence of at least two forms of laminin-proteoglycan complexes which differ in biochemical, immunochemical and ultrastructural characteristics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00966313
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Big Moose Basin: simulation of response to acidic deposition (1987)
    Springer
    Biogeochemistry 3 (1987), S. 141-161 
    Details
    ISSN: 1573-515X
    Keywords: acidic deposition ; Adirondacks ; modeling surface water acidification ; water chemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences
    Notes: Abstract The ILWAS model has been enhanced for application to multiple-lake hydrologic basins. This version of the model has been applied to the Big Moose basin, which includes Big Moose Lake and its tributary streams, lakes, and watersheds. The basin, as defined, includes an area of 96 km2, with over 20 lakes and ponds, and 70 km of streams. Hydrologic and chemical calibrations have been made using data from seven sampling stations. When total atmospheric sulfur loading to the basin is halved, the model predicts, after four years of simulation, a decreasing sulfate concentration and to a lesser extent a rising alkalinity at Big Moose Lake outlet. At the end of four years, the results show an increase in pH of 0.1 to 0.5 pH units depending upon season.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02185190
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
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