Although considerable experimental evidence suggests that
endogenous adenosine may function as a modulator of neuronal activity
in the etiology or control of seizures, the neuroanatomical and
neurochemical basis for the anticonvulsant actions of adenosine have
not been well established. A discrete brain region of possible
fundamental importance to epileptogenisis within...
Polychlorinated dibenzo-p-dioxins (PCDD's) and
dibenzofurans (PCDF's) are environmental pollutants associated with the production and use of a number of industrial
chemicals. In addition, PCDD's and PCDF's are produced
during low temperature combustion of wastes containing
polyvinylchloride (PVC), chlorophenols, and a number of
other chemical precursors.
A significant source of environmental...
Forty-two fall-calving crossbred cows were equally
allotted to six pens of seven cow-calf pairs each. Two
treatments (0 and 200 mg lasalocid/head/day) with three
replications were used to determine the effects of
lasalocid on fall-calving beef cows. The cows were fed
grass hay, haylage and pasture ad libitum. The cow-calf...
The gonadal steroids, testosterone and estradiol, are known to be important
modulators of neuronal functions and behaviors in most vertebrate species. These
steroid hormones also elicit changes in neuropeptide synthesis and secretion, alter
specific neurohormone receptor levels, and alter neuronal morphology and
electrophysiology. Many of the actions of androgens and...
Much outdoor recreation occurs on publicly owned land and water
resources, or involves use of these public resources. Consequently, an
economic problem arises concerning the value of recreational resources
which do not have a conventional market price. Without a price to guide
the allocation of resources, it is difficult to...