Donald Adams

Learn More
Methanogenesis, an anaerobic microbial process in sediments, was investigated in a naturally acidic bog lake, Grosse Fuchskuhle, in northeastern Germany. The lake was artificially divided into four sub-basins: two western basins receiving humic substances from an adjacent Sphagnum bog and two eastern basins isolated from this acidic inflow with installed(More)
The present study examines the behavioral and psychophysiological effects of phenytoin (PHT) in individuals who display impulsive-aggressive outbursts. In a double-blind placebo-controlled crossover design, individuals meeting previously established criteria for impulsive aggression were administered PHT and placebo during separate 6-week conditions. The(More)
The Hooper Visual Organization Test (HVOT; Hooper, 1958) is a commonly used measure of visual perceptual function. However, serious questions have recently been raised about its construct validity (i.e., the role of object naming). This study further examined the HVOT's construct validity and began exploring its contribution to outcome prediction in stroke(More)
A computer interface has been designed and implemented that allows presentation of biphasic pulse stimuli to patients with the Nucleus Ltd./Cochlear Corporation cochlear implant. The one version of the interface connects to a standard parallel output port of a PC or AT compatible computer, and another version plugs directly into a standard PC/XT bus slot.(More)
The present study attempted to replicate the findings of previous factor analytic studies of the Wisconsin Card Sorting Test (WCST) in a homogeneous sample of patients suffering recent cerebrovascular accidents and being treated in a comprehensive inpatient physical rehabilitation program. In addition this study examined the relationship of the WCST to(More)
This study compared the behavioral effects of 3 anticonvulsants in impulsive aggressive men. In a double-blind, placebo-controlled, parallel groups design, participants were randomly assigned to 1 of 4 6-week treatments: phenytoin (n = 7), carbamazepine (n = 7), valproate (n = 7), or placebo (n = 8). The efficacy measure was the average aggression score, a(More)
BACKGROUND St. Louis encephalitis (SLE) is a relatively common cause of neurological illness, yet little is known about its cognitive and psychosocial consequences. PURPOSE To describe the cognitive, emotional, psychophysiological, and psychosocial consequences of SLE infection. METHOD A comprehensive neuropsychological and psychophysiological(More)
This study demonstrates the reliability of 3 Clock Drawing Test (CDT) scoring systems when applied to the protocols of stroke patients. The sample included 20 randomly selected sets of both freehand and predrawn circle versions ofthe CDT completed by patients undergoing comprehensive stroke rehabilitation. The protocols were scored independently by 2 raters(More)
Profitability of calf-fed and back-grounding yearling systems was determined based on actual production data and prices from 1996 to 2007, and variability across years was compared. The two systems exhibited similar profits, on average, but the calf-fed system showed less profit variability, suggesting there is more risk inherent in a yearling(More)