. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FLOYD JOHN BRINLEY. form of undissociated molecules; thus it was deemed advisable to study the effect of dissociated and undissociated molecules of HCN on the potential difference of frog skin. Control experi- ments were conducted using borax-boric buffer free from cyanide at a pH of and to determine whether or not the hydrogen ion has any effect on the frog skin. Fig. 12 shows the results. 0 20 30 MINUTES 50 60 FIG. 12. Curve showing the effect of pH of the borax buffer on the potential difference of frog skin. pH v
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FLOYD JOHN BRINLEY. form of undissociated molecules; thus it was deemed advisable to study the effect of dissociated and undissociated molecules of HCN on the potential difference of frog skin. Control experi- ments were conducted using borax-boric buffer free from cyanide at a pH of and to determine whether or not the hydrogen ion has any effect on the frog skin. Fig. 12 shows the results. 0 20 30 MINUTES 50 60 FIG. 12. Curve showing the effect of pH of the borax buffer on the potential difference of frog skin. pH valves and Abscissae repre- sents the exposure in minutes; ordinates, the in volts. obtained. It is obvious that the two curves coincide very closely and that the hydrogen ion had no effect on the skin. It may be noted that the curves are strikingly similar to the control curves plotted in Fig. 9. The initial rise followed by a gradual decline was again manifested. Fig. 13 shows the results obtained by placing the frog skin " cells " in a solution of HCN in borax buffer at pH values of and The concentration of cyanide used was M/I54. The temperature was constant at 22° C. ± °. The " cells " were placed for ten minutes in a borax buffer solu- tion at pH values of and respectively; at the end of that time they were removed and put in a borax buffer containing. 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
Size: 1661px × 1504px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
