[The effect of submillisecond temperature jump on the mechanical tension of skinned muscle fibers of the frog in a state of rigor].
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.
D000818:Animals; D066298:In Vitro Techniques; D008954:Models, Biological; D009119:Muscle Contraction; D009132:Muscles / Q000502:physiology*; D011898:Ranidae; D013696:Temperature; D013718:Tensile Strength; D013997:Time Factors
Deĭstvie submillisekundnogo skachka temperatury na mekhanicheskoe napriazhenie demembranizirovannykh volokon skeletnoĭ myshtsy liagushki v sostoianii rigora.