[Pyruvate dehydrogenase activation in the skeletal muscles of the chick embryo during electrostimulation].

The pyruvate dehydrogenase activity in the skeletal muscle during chicken embryo-genesis and early postnatal life amounts to 550 +/- 50 mU per g tissue, on the average; electrostimulation (1 Hz) induced a two-fold increase in its activity starting from the 15th day of incubation.

[Activation of glycogenolysis during electrostimulation of the skeletal muscles in the chick embryo under aerobic conditions].

A cooperative activation of glycogenolysis was found in the chick embryo skeletal muscles (upon electrostimulation) on the 13th day of incubation (stage 39 after Hamburger, Hamilton, 1951).