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An in vitro method of altering the apparent cleavage specificities of restriction endonucleases was developed using DNA modification methylases. This method was used to reduce the number of cleavage sites for 34 restriction endonucleases. In particular, single-site cleavages were achieved for Nhe I in Adeno-2 DNA and for Acc I and Hinc II in pBR322 DNA by(More)
The purpose of this study was to determine the effects of speed, hip angle, knee angle, and gravity on hamstring to quadriceps (H/Q) torque ratios. Eighteen healthy college-aged men performed three maximal-effort knee extension and flexion repetitions on a Cybex II isokinetic dynamometer at speeds of 15 and 90 degrees /sec. Hamstring and quadriceps torques(More)
Virtual environment navigation can be improved through the use of a navigational aid. In this study two different navigational aids, one active aid and one passive aid, were tested. An eye-tracking apparatus was used to collect fixation data on each navigational aid, in addition to task performance data and user preference data. It was hypothesized that(More)
Consideration of the anatomy of the nervous system and events (ie., age, physical training, motor learning) that invoke changes in neural regulatory mechanisms and other bodily systems renders the impact of the type of instruction used to elicit a maximal effort in the assessment of muscle function across age, among different muscle groups, and for(More)
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