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  • Lake management  (1)
  • calcium  (1)
  • smooth muscle  (1)
  • 1975-1979  (2)
  • 1965-1969
  • 1950-1954
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Publisher
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Environmental management 3 (1979), S. 195-203 
    ISSN: 1432-1009
    Keywords: Lake management ; Non-point source pollution ; Homeowners associations ; Adirondack Park ; Acid rain
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The purpose of this study was to determine what role lakeshore homeowner associations might play in environmental management. Lakeshore homeowner associations are formally organized groups of individuals owning property on or in the vicinity of a lake. Lakeshore homeowner associations in the Adirondack Park region of New York State were investigated by both a questionnaire mailed to all presidents and an informal field survey of some permanent lakeshore residents. The study showed that many of these organizations have become highly involved in an array of environmental management activities during their relatively long history. These activities include monitoring septic tank seepage, regulating the use of motorboats, restricting shoreline development, and assisting state and local planning agencies in detecting zoning violations. Some lakeshore homeowner associations are not highly involved in activities designed to maintain or improve quality of the lake environment. These associations are concerned instead primarily with organizing social events and performing other miscellaneous activities, such as access road maintenance. These associations, however, report lower overall water quality in their lakes than those associations with a high degree of involvement in environmental management. The study uncovered two important factors that tend to undermine the ability of lakeshore homeowner associations to undertake environmental management activities. One is the extent of cooperation that can be expected from nonmember residents of the lakeshore, such as seasonal vacationers. The second is an environmental problem that does not originate locally and therefore cannot be controlled by a local organization. Acid precipitation, rated by association presidents as their foremost water quality concern, is one such problem in the Adirondack Park Region.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Molecular and cellular biochemistry 158 (1979), S. 91-95 
    ISSN: 1573-4919
    Keywords: smooth muscle ; vascular ; ATPase ; calcium
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract Densities of sarcoplasmic reticulum (SR) Ca2+-pump were compared in proximal and distal segments of pig left coronary artery using two biochemical methods: acylphosphate formation and immunoreactivity in Western blots, and a functional assay based on contraction to SR Ca2+-pump inhibitors. In the microsomes prepared from smooth muscle, the level of the 115 kDa SR Ca2+-pump acylphosphate was 7.1 ± 0.3 -fold greater in distal than in proximal segments. Similarly in Western blots using these microsomes, the reactivity of the 115 kDa band to an anti-SR Ca2+-pump antibody was 5.3 ± 0.8 -fold greater in distal than in proximal segments. Endothelium free coronary artery rings contracted to the SR Ca2+-pump inhibitors Cyclopiazonic acid (CPA, EC50 = 0.19 ± 0.06 μM) and thapsigargin (EC50 = 0.0095 ± 0.0035 μM). With 10 μM CPA, the force of contraction per tissue wet weight was 4.2 ± 0.5-fold greater in distal than in proximal rings, and with 1 μM thapsigargin it was 4.0 ± 1.0 -fold greater. The contractions produced by 60 mM KCl were used as a control. In contrast to the CPA and thapsigargin, the force per mg tissue weight produced by 60 mM KCl did not differ significantly between the proximal and distal segments. Thus, the results from the two biochemical methods and those from the contractility data were all consistent with the smooth muscle in the distal segments of the coronary artery containing a higher density of the SR Ca2+-pump than the proximal segments.
    Type of Medium: Electronic Resource
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