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. 1970 Oct 1;56(4):521–541. doi: 10.1085/jgp.56.4.521

Solvent Water for Electrolytes in the Muscle Fiber of the Giant Barnacle

J A M Hinke 1
PMCID: PMC2225969  PMID: 5507094

Abstract

Seven experiments are described which permit estimation of the "solvent water" or the "osmotically active water" of the dissected fiber from the giant barnacle, Balanus nubilus. Each of the first four experiments includes the measurement of a free ion activity in the myoplasm by means of a Na+, K+, or Cl- ion-specific microelectrode. The fifth experiment makes use of a membrane potential vs. [K]o curve. The last two experiments measured fiber water and fiber volume as bath osmolarity was changed. The seven independent estimations of solvent water ranged from 0.64 to 0.72 of fiber water with a mean of 0.68. Since the extracellular space of single fibers was about 7% of fiber water, it was concluded that 25% of analyzable water was not acting as solvent for the osmotically active solutes in the myoplasm.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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