Preferences of Physical Therapy Students Regarding Digital and Printed Textbooks.

Aims: Research has shown mixed results regarding students' preferences of digital over printed textbooks. However, none of the published studies have studied physical therapy students and few have surveyed students across more than one professional program. The purpose of this study was to identify the perceptions and use of digital textbooks and printed textbooks by students in four different physical therapy programs.

Arachidonic acid incorporation and turnover is decreased in sympathetically denervated rat heart.

Heart sympathetic denervation can accompany Parkinson's disease, but the effect of this denervation on cardiac lipid-mediated signaling is unknown. To address this issue, rats were sympathetically denervated with 6-hydroxydopamine (6-OHDA, 50 mg/kg ip) and infused with 170 muCi/kg of either [1-(14)C]palmitic acid ([1-(14)C]16:0) or [1-(14)C]arachidonic acid ([1-(14)C]20:4 n-6), and kinetic parameters were assessed using a steady-state radiotracer model. Heart norepinephrine and epinephrine levels were decreased 82 and 85%, respectively, in denervated rats, and this correlated with a 34% reduction in weight gain in treated rats.

Impaired agonist-dependent myosin phosphorylation and decreased RhoA in rat portal hypertensive mesenteric vasculature.

The purpose of the present study was to examine the effects of portal hypertension on agonist-induced myosin phosphorylation and RhoA expression in vascular smooth muscle. A possible link to cAMP-dependent events was also examined. Portal hypertension was produced by stenosis of the portal vein.

Effects of chronic portal hypertension on small heat-shock proteins in mesenteric arteries.

Previous studies have shown that impaired vasoconstrictor function in chronic portal hypertension is mediated via cAMP-dependent events. Recent data have implicated two small heat-shock proteins (HSP), namely HSP20 and HSP27, in the regulation of vascular tone. Phosphorylation of HSP20 is associated with vasorelaxation, whereas phosphorylation of HSP27 is associated with vasoconstriction.

Nitrate Contamination from Dairy Lagoons Constructed in Coarse Alluvial Deposits.

In an effort to reduce surface inflows of nutrients to Deer Creek Reservoir in north central Utah, several dairies in Heber Valley constructed unlined lagoons to store wastes for later application onto fields as fertilizer. Previous research indicated that dairy lagoons sealed with use and were not significant sources of contamination; however, the soils in Heber Valley are coarser than in the literature. Therefore, two of Heber Valley's dairy lagoons were studied as sources of NO -N to the groundwater system.

Virtual instrumentation for frequency analysis of carotid sinus responses.

An advanced microcomputer based process control and instrumentation system was developed for real time frequency analysis of the viscoelastic relationships between the carotid sinus wall and indwelling baroreceptors. A 486 based AT bus microprocessor running data acquisition and visualization software was customized providing a virtual instrument for data collection, display, and recording. A full complement of signal processing algorithms was developed for the collection of large time sampled data sets and their conversion to the frequency domain for analysis.

Frequency analysis instrumentation for sinus wall and baroreceptor responses.

Blood pressure regulation involves feedback signals from baroreceptors detecting wall strain of arterial sinuses. A research goal is identification of wall viscoelastic properties and associations between elements and baroreceptors. This report presents development of computer-based procedures for control of pressure inputs and recording responses of an in situ carotid sinus.

Model inferences on baroreceptor & sinus wall responses.

Mechanical associations between sinus wall elements and those between wall and baroreceptor were modeled with differential equations. Viscoelastic relationships were tested using frequency domain analysis (TUTSIM, FANSIM). Two wall models were examined.