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[亚毫秒级温度跃变对处于强直状态的青蛙皮肤肌肉纤维机械张力的影响]

[The effect of submillisecond temperature jump on the mechanical tension of skinned muscle fibers of the frog in a state of rigor].

作者信息

Bershitskiĭ S Iu, Tsaturian A K

出版信息

Biofizika. 1985 Sep-Oct;30(5):868-72.

PMID:4052484
Abstract

Modification of temperature jump method for skinned skeletal muscle fibres is described. The fibre heating was obtained applying the high-voltage high-frequency current impulse to the fibre after removing the surrounding solution. The method permits to obtain the heating for 15 degrees C in 0.25 msec. The temperature jump in rigorized fibre induced instantaneous drop of tension. This effect is probably induced by thermal expansion of contractile proteins in the fibre.

摘要

描述了用于去皮骨骼肌纤维的温度跃变方法的改进。在去除周围溶液后,通过向纤维施加高压高频电流脉冲来实现纤维加热。该方法能够在0.25毫秒内使温度升高15摄氏度。在僵直纤维中温度跃变会引起张力瞬间下降。这种效应可能是由纤维中收缩蛋白的热膨胀引起的。

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