Injury, recovery, and death, in relation to conductivity and permeability . sort are also produced by hypo- and hypertonic solu-tions, by dryijig, by moderate heat { 35° C), by lack of oxygen, or byexposure to ordinary laboratory conditions. In some cases a temporary rise is observed, due to the fact that ionsdiffuse out of the tissue faster than they diffuse in. This is easily recog-nized because it ia as pronounced with dead tissue as it is with Osterhout (1918, D). ^Cf. Osterhout (1912, A). * This does not apply to OH, which is exceptional. •Raber, 0. L. (1921, A). In these s
Injury, recovery, and death, in relation to conductivity and permeability . sort are also produced by hypo- and hypertonic solu-tions, by dryijig, by moderate heat { 35° C), by lack of oxygen, or byexposure to ordinary laboratory conditions. In some cases a temporary rise is observed, due to the fact that ionsdiffuse out of the tissue faster than they diffuse in. This is easily recog-nized because it ia as pronounced with dead tissue as it is with Osterhout (1918, D). ^Cf. Osterhout (1912, A). * This does not apply to OH, which is exceptional. •Raber, 0. L. (1921, A). In these studies the solutions were not of the same concentration, butall had the conductivity of sea water, except the molybdate, which hadthe conductivity of 75% sea water plus 25% distilled water. Hencethe conclusions stated above should be taken in a qualitative ratherthan a quantitative sense. 40 MECHANISM OF PROCESS OF J3EAT1I 41 studies by Rabor^ indicate tbat the rise in resistancewhich is produced by bivalent and trivalent kations is 100 PER CENT OF CONTROL 90 70 50 30. 2 6 HOURS Fig. 13.—Curves of net electrical resistance of Lnminaria agardhii in 1793 NaCl {-207 CaCh M with the addition of , , and M NaOH. The per-centages were calculated on the basis of the net resistance of the control. All readings weretaken at 18° C. or corrected to this temperature. Each curve represents a single experiment less when they are combined with trivalent anions thanwhen combined with univalent. The writer* has found that OH is more effective thanany other anion in producing a fall in resistance. Since Raber, O. L. (1921, B, C).«C/. Osterhout (1914, i?). \ 42 INJURY, RECOVERY, AND DEATH the addition of alkali to sea water produces a precipitateof Mg(0H)2 the experiments were made by adding vari- 100 PER CENT OP CONTROL
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