Gilbert S H, Matsumoto Y
J Gen Physiol. 1976 Jul;68(1):81-94. doi: 10.1085/jgp.68.1.81.
Isolated Rana pipiens sartorius muscles at 0degreeC were stimulated via their nerves and small stretches or releases applied during the plateau of the isometric tetanus at lo. Extra heat above the isometric maintenance heat was produced during the drop in tension caused by release and, for very small releases (delta less than or equal to 0.5% lo), was completely reabsorbed during tension recovery. The extra heat was always directly proportional to the tension change. Heat absorption proportional to the tension change was also observed during the increase in tension produced by small stretches in the range 0.5% lo less than or equal to deltal less than or equal to 3.0% lo. The mean heat:tension ratio R in seven experiments was -0.0084, which is within the range of values reported previously by Woledge. In addition, it was found that during tension recovery after small releases of 1.0% lo less than or equal to deltal less than or equal to 3.0% lo the "contractile" component seems able to shorten about 1% lo without producing shortening heat.
在0摄氏度下，通过神经刺激分离的牛蛙缝匠肌，并在等长强直收缩的平台期（lo）施加小幅度的拉伸或释放。在由释放引起的张力下降过程中，会产生高于等长维持热的额外热量，并且对于非常小的释放量（δ≤0.5%lo），在张力恢复过程中这些额外热量会被完全重新吸收。额外热量始终与张力变化成正比。在0.5%lo≤δ≤3.0%lo范围内的小幅度拉伸所产生的张力增加过程中，也观察到与张力变化成正比的热吸收现象。七个实验中的平均热：张力比R为-0.0084，这在Woledge之前报告的值范围内。此外，还发现，在1.0%lo≤δ≤3.0%lo的小幅度释放后的张力恢复过程中，“收缩”成分似乎能够缩短约1%lo而不产生缩短热。
