Injury, recovery, and death, in relation to conductivity and permeability . 0--0----0 o- 300 600 QOOmin. FiQ. 37.—Curves showing net electrical resistance of Laminaria agardhii in NaCl M (unbroken line), and recovery in sea water (dotted lines). The figure attached to each recovery curve denotes the time of exposure (in minutes) to the solution of NaCl. CaCL. Curve C in Fig. 38 shows the behavior of tissueplaced in a solution containing mols of NaCl of CaCL; its electrical resistance falling in to of the original value in sea a solution co
Injury, recovery, and death, in relation to conductivity and permeability . 0--0----0 o- 300 600 QOOmin. FiQ. 37.—Curves showing net electrical resistance of Laminaria agardhii in NaCl M (unbroken line), and recovery in sea water (dotted lines). The figure attached to each recovery curve denotes the time of exposure (in minutes) to the solution of NaCl. CaCL. Curve C in Fig. 38 shows the behavior of tissueplaced in a solution containing mols of NaCl of CaCL; its electrical resistance falling in to of the original value in sea a solution containing 85 mols of NaCl to 15 mols ofCaCla (Curve A) the resistance fell in the same time topractically the same point {72A7%). When these two lots of tissue were replaced in seawater they behaved differently. The resistance of the C/. Osterhout (1920, A, B; 1921, A, B, C). INJURY AND RECOVERY 9:\ first lot rose to (Pig. 38, upper dotted line),but the resistance of the second fell (much more rapidlythan if it had not been removed to sea water) and eventu- 140%n. mm. Fia. 38.—Curves showing net electrical resistance of Laminaria anardhii in a solution con-taining mols of NaCl to mols of CaClj (Curve C) and in a solution containing 86mols of NaCl to 15 mols of CaCh (Curve A). The dotted lines show recovery in sea B and D show the levels to which the resistance rises when the tissue recovers in eeawater after exposure to these mixtures; their abscissae denote the times of exposure. CurveB pertains to the first mixture (belonging with Curve C), while Curve D pertains to thesecond mixture (belonging with Curve A). ally became practically stationary at (Fig. 38,lower dotted line). If we plot the curve of permanent injury {i, e, levelto which the resistance rises after replacing the tissuein sea water) after various periods of exposure to thefirst mixture, we get Curve B (and for the second mix-ture. Curve D). 94 INJURY, EECOVERY, AND D
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