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  • A. Matzke, S. Uselman, +12 authors W. Platts
  • 1999
Interpretive Summary Livestock grazing has damaged approximately 80% of stream and riparian ecosystems in the western United States. Although these areas compose only 0.5-1.0% of the overall landscape, a disproportionately large percentage (~70-80%) of all desert, shrub, and grassland plants and animals depend on them. The introduction of livestock into(More)
1. The effects of antidiuretic hormone (ADH), theophylline and cyclic 3',5'-adenosine monophosphate (AMP) on membrane potentials in frog skin have been investigated.2. Membrane potentials across the outer and inner facing membranes were recorded in both normal and current clamped skins. In the latter condition active transport of sodium had been abolished(More)
1. The instantaneous impedance method has been used to study the effects of antidiuretic hormone (ADH) on frog skin.2. The resting skin may be represented by a parallel RC network with a single time constant.3. Antidiuretic hormone causes an increase in conductance and capacitance and in some cases the appearance of a polarization angle.4. The structures in(More)
1. Impedance loci for frog skins have been calculated by computer analysis from voltage transients developed across the tissues.2. Attention has been paid to simultaneous changes in conductance and capacitance of skins treated either with antidiuretic hormone (ADH) or with theophylline. These drugs always caused an increase in conductance and usually the(More)
1. Substitution of chloride by isethionate reduces the short circuit current (SCC) and increases the potential of isolated frog skin. In sodium isethionate Ringer antidiuretic hormone and choline chloride increase the SCC, whereas theophylline is ineffective.2. Frog skins treated on the outside with copper ions always show an increased potential when bathed(More)
Asthma is the most common of the chronic lung diseases diagnosed in children and accounts for a large percentage of emergency department/hospital admissions. Recently, the use of continuous administration of Beta-adrenergic agents has been found to be a safe and effective method of therapy for the pediatric patient experiencing severe asthma. An(More)