. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 164 M. A. McWHINNIE AND H. M. SWEENEY X 4 Ld Q Ld CL o O O cr I O. 0 15 30 45 60 75 90 105 120 135 TIME IN MINUTES FIGURE 4. Comparative activities of extracts prepared the sinus glands and neural elements of Trachelipus when assayed upon the red chromatophores of Cambarus (concentration 5). Dispersing activity: sinus glands (A) ; optic tracts (B) ; cerebral ganglia (C). Concen- trating activity: subesophageal ganglia (D) ; anterior half of thoracic cord (E) ; connectives (F) ; posterior half of thoracic cord (G). substances
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 164 M. A. McWHINNIE AND H. M. SWEENEY X 4 Ld Q Ld CL o O O cr I O. 0 15 30 45 60 75 90 105 120 135 TIME IN MINUTES FIGURE 4. Comparative activities of extracts prepared the sinus glands and neural elements of Trachelipus when assayed upon the red chromatophores of Cambarus (concentration 5). Dispersing activity: sinus glands (A) ; optic tracts (B) ; cerebral ganglia (C). Concen- trating activity: subesophageal ganglia (D) ; anterior half of thoracic cord (E) ; connectives (F) ; posterior half of thoracic cord (G). substances, extracts were prepared from nervous systems which had been divided into the following regions: (1) sinus glands; (2) optic tracts; (3) cerebral ganglia (including deuterocerebrum and protocerebrum) ; (4) circumesophageal connec- tives (including the tritocerebrum) ; (5) subesophageal ganglia (including first and second maxillary and the maxipedal ganglia) ; (6) anterior half of thoracic cord; (7) posterior half of thoracic cord (including the abdominal ganglion). Due to the extreme fragility of the abdominal nerves, no determinations were made of the activity of these elements. The individual fragments were placed into separate mortars. Because the chromatophorotropins undergo a slow in- activation at room temperature, the mortars were placed on ice during the prepa- ration of the extracts. When 10 intact nervous systems had been dissected and divided into the appropriate regions, the fragments were triturated and mixed with one cc. of saline. The extracts were then maintained in small capped vials and refrigerated until further use. Extracts could be kept in this manner for several days without undergoing a loss of 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 (Wo
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
