...-propelled diving Uria aalge Fratercula cirrhata biomechanics video analysis mechanical efficiency flap cycle © The Company of Biologists Limited 2004 2004 26 5 2004 Address for correspondence: University of Memphis Biology Department, 5700 Walker Avenue, 103 Ellington Hall...

... rotation (supination) or rapid fin closure against the body. The energetics of pectoral fin rowing are estimated using the unsteady blade-element model and an indirect method based on the center of mass dynamics. The results indicate that the mechanical efficiency of pectoral fin rowing is low (0.1–0.3...

... with volume loading, from a basal value of approximately 20 μl O 2 min -1 g -1 to approx. 40 μl O 2 min -1 g -1 , but was not significantly affected by the absence of coronary perfusion. Mechanical efficiency under basal conditions was approximately 17%,but was not affected by either volume loading...

...Haruo Sugi; Hiroyuki Iwamoto; Tsuyoshi Akimoto; Hirohiko Kishi SUMMARY We were interested to estimate the maximum mechanical efficiency with which chemical energy derived from ATP hydrolysis is converted into mechanical work by individual cross-bridges when they perform their powerstroke...

... and enthalpy output were determined, from which the maximum net mechanical efficiency could be calculated. The most notable result from these experiments was the constancy of enthalpy output per twitch, or energy cost, despite the various alterations made to the protocol. Changes in mechanical efficiency...

...L. J. Mellors; C. L. Gibbs; C. J. Barclay ABSTRACT The results of previous studies suggest that the maximum mechanical efficiency of rat papillary muscles is lower during a contraction protocol involving sinusoidal length changes than during one involving afterloaded isotonic contractions. The aim...

... between segments of the same limb, but not among the limbs or between the limbs and the centre of mass of the whole body. 16 9 1994 © The Company of Biologists Limited 1995 human locomotion mechanical work mechanical efficiency energy transfer external and internal work...

...C. J. Barclay ABSTRACT The mechanical efficiency of mouse fast- and slow-twitch muscle was determined during contractions involving sinusoidal length changes. Measurements were made of muscle length, force production and initial heat output from bundles of muscle fibres in vitro at 31°C. Power...