. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. PHYSIOLOGICAL EFFECTS OF HYDROGEN CYANIDE. 379 stimulation, characterized by a rise in potential difference, is also evident at a concentration of M/i$4 but not nearly to the same degree as with the weaker concentration of cyanide. The drop following stimulation at a concentration of M/I54 is practically of the same magnitude as obtained with a M/225 solution. In the case of the M/i$6 solution there was no stimulation but the potential difference dropped suddenly to the base line. The skin. 10 t 20 30 4-0 MINUTES t60 70 FIG.
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. PHYSIOLOGICAL EFFECTS OF HYDROGEN CYANIDE. 379 stimulation, characterized by a rise in potential difference, is also evident at a concentration of M/i$4 but not nearly to the same degree as with the weaker concentration of cyanide. The drop following stimulation at a concentration of M/I54 is practically of the same magnitude as obtained with a M/225 solution. In the case of the M/i$6 solution there was no stimulation but the potential difference dropped suddenly to the base line. The skin. 10 t 20 30 4-0 MINUTES t60 70 FIG. 10. Curve showing the relation of concentration of HCN to the of frog skin. Concentration of total cyanide = M/22$, A//154 and Af/i36. Same solution on both sides of the membrane. The period between arrows indicates the time that the skin was exposed to cyanide, at other times the skin was exposed to borax buffer free from HCN. Abscissae rep- resents the time in minutes; ordinates the in volts. Different pieces of skin from the same frog were used. 26. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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