. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. \ I FIGURE 7. Recovery in length of perivitelline fibers (arrows) after the removal of current. H pulcherrimus. Bar = 10 of the line (Fig. 9) indicates that a threshold for the movement of the egg lies at V/cm. Such a 'threshold' indicates the presence of'resting tension' of the fibers which is counterbalanced by the electrophoretic force of the potential gradient of V/cm. This component of resistive force which is independent of stretch may be regarded as due to some surface force or tension at the protoplasmic su
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. \ I FIGURE 7. Recovery in length of perivitelline fibers (arrows) after the removal of current. H pulcherrimus. Bar = 10 of the line (Fig. 9) indicates that a threshold for the movement of the egg lies at V/cm. Such a 'threshold' indicates the presence of'resting tension' of the fibers which is counterbalanced by the electrophoretic force of the potential gradient of V/cm. This component of resistive force which is independent of stretch may be regarded as due to some surface force or tension at the protoplasmic surface of the fibers. As seen from Figure 9, the slope of the line of centrifuged eggs (without fibers) is greater than that of normal eggs with intact fibers. This indicates that the fibers show a resistance proportional to the velocity of the eggs (or the speed of stretch of the fibers). This may be regarded as viscous resistance which the fibers show against their stretch. In conclusion, the resistive force due to the fibers is composed of tensional force and internal viscous resistance. 315 c o *j - . - 0 >— u D LU. -(0-0) 0 5678 Time (sec) 10 11 12 FIGURE 8. Electrophoretic migration of the egg with intact fibers. Two examples are shown. Broken lines are the boundaries of the perivitelline space. Potential gradient: V/cm. H. pulcherrimus. 22° 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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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
