isoelectric period

isoelectric period

n.

The period in the electrocardiogram between the end of the S wave and the beginning of the T wave, during which electrical forces neutralize each other so that there is no difference in potential under the two electrodes.

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isoelectric period,

a period in physiologic activity, such as nerve conduction or muscle contraction, when there is no variation in electric potential.

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isoelectric

showing no variation in electric potential.

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isoelectric focusing

an electrophoretic method for separating proteins in gels which depends on the fact that the net charge on the protein varies with the pH of the surrounding medium. At the isoelectric point the protein has no net charge and will not therefore migrate further in an electric field. The polyacrylamide gel is cast in a narrow tube that provides a pH gradient from top to bottom.

isoelectric period

the moment in muscular contraction when no deflection of the galvanometer is produced.