The oxygen uptake of frozen and thawed muscles

Abstract

The O2 uptake of frogs'' muscles in the frozen state diminishes to zero at[long dash]4[degree] C. Muscles frozen 24 hrs. at a temp. not lower than[long dash]2.4[degree] recover their initial O2 uptake on thawing. Below[long dash]3[degree] the O2 uptake on thawing is reduced to less than 10% of the resting uptake. The loss of contractility and of the capacity to synthesize glycogen and phosphagen observed in thawed muscles is not due to destruction of the respiratory faculty of the muscle.