. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. LEAD UPTAKE BY PHYTOPLANKTON 123 TABLE 111 Cells of Phaeodactylum tricornutum "saturated" at the sin-iucc with lead, measured 10 initi after lead addition. Cell number (lO'cells/l) Pb addition to medium (mg/1) PI) adsorbed to cells (mg/1) O/g/g dry weight) 1 2 4 11,860 11,280 11,780 Average: 11,640 Figure 4 shows the adsorption isotherms for PJiacodactylum and Platynionas after one hour of lead exposure. [The values for the lowest lead addition ( mg/1) have not been used for this
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. LEAD UPTAKE BY PHYTOPLANKTON 123 TABLE 111 Cells of Phaeodactylum tricornutum "saturated" at the sin-iucc with lead, measured 10 initi after lead addition. Cell number (lO'cells/l) Pb addition to medium (mg/1) PI) adsorbed to cells (mg/1) O/g/g dry weight) 1 2 4 11,860 11,280 11,780 Average: 11,640 Figure 4 shows the adsorption isotherms for PJiacodactylum and Platynionas after one hour of lead exposure. [The values for the lowest lead addition ( mg/1) have not been used for this figure as the very low concentration in the medium (< mg/1) could not be determined exactly]. The data for both algae are highly correlated with the lines fitted by the method of least squares. The resulting logarithmic equations can be converted to the following exponential equations: Phacodaci\luin. \ = .rn-S(i; and Platvinonas, v = .r"-7a. PHAEODACTYLUM. 0 FIGURE 5. Phaeodactylum tricornutum : lead content of cells exposed to ing Pb/1 in the presence of 0 to 2 X 10~6 M EDTA, as a function 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 (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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