. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 482 C. BARKER J0RGENSEN AND EDWARD D. GOLDBERG concentration is plotted against time. The initial concentration is assigned the value of 100. No significant difference was found in the rates of removal of the two materials, even when freshly prepared suspensions of graphite were used. Therefore particles down to 1-2 ^ in diameter are effectively removed by dona from the water passing the branchial basket. It is also evident from Figure 2 that the curves are nearly straight lines, indi- cating a constant rate of removal of th
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 482 C. BARKER J0RGENSEN AND EDWARD D. GOLDBERG concentration is plotted against time. The initial concentration is assigned the value of 100. No significant difference was found in the rates of removal of the two materials, even when freshly prepared suspensions of graphite were used. Therefore particles down to 1-2 ^ in diameter are effectively removed by dona from the water passing the branchial basket. It is also evident from Figure 2 that the curves are nearly straight lines, indi- cating a constant rate of removal of the suspended material, , a constant rate of water transport throughout the experiments. The relatively constant rate of filtra- tion has always been found in undisturbed, healthy specimens of Ciona, Mytilus and Crassostrca (see below).. FIGURE 5. dona. Rate of removal of crab (Loxorhyncluis) htmocyanin (X) and graphite (O •). In contrast to the effective removal of colloidal graphite, a low degree of re- tention of the blood proteins was found. In the case of hemoglobin, 90 minutes were required to reduce the hemoglobin concentration by 10%, compared with only three minutes for suspended graphite (Fig. 3). Thus, only a few per cent of the hemoglobin were removed from the water during its passage through the branchial basket. Similar results were obtained with Haliotis hemocyanin (Fig. 4), whereas in the only experiment performed with the crab blood, about 50% were extracted in three hours (Fig. 5). More experiments are necessary in order, to ascertain. 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, Alfre
Size: 1674px × 1493px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
