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- W2012102181 abstract "The compartmentalization of the heavy metals Pb and Zn was studied in Chlorella saccharophila, Navicula incerta and Nitzschia closterium using the STEM with dispersive X-ray spectrometer. Cells were exposed to the metals, at various concentrations, for 96 hr and then air dried on formvar coated grids. Lead was found to be concentrated in cell sectors with polyphosphate bodies in C. saccharophila at 13.3 ppm and in N. incerta and N. closterium at 10 ppm. Lead was also detected when the probe was placed on the cell margin (cell wall sector) of C. saccharophila at 25 ppm and 5.6 ppm in N. closterium. No Pb was detected in the cell margin sector (cell wall) of N. incerta at metal concentrations up to 10 ppm. In cells exposed to Zn, the metal was detected in polyphosphate body cell sectors in C. saccharophila starting at 1.0 ppm and in N. incerta starting at 2.3 ppm. Small amounts of Zn were detected in cell sectors away from polyphosphate bodies in C. saccharophila starting at 2.3 ppm. No Zn was detected in N. closterium at metal concentrations up to 2.3 ppm. It is suggested that the compartmentalization of the heavy metals Pb and Zn into polyphosphate bodies and the cell wall may be a means by which some algae reduce the toxicity of these cations. These means of sequestering heavy metals may also be a significant way in which heavy metals move, in large amounts, in the food chain." @default.
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- W2012102181 title "An x-ray energy dispersive study of cellular compartmentalization of lead and zinc in Chlorella Saccharophila (Chlorophyta), Navicula incerta and Nitzschia closterium (bacillariophyta)" @default.
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- W2012102181 doi "https://doi.org/10.1016/0098-8472(82)90024-7" @default.
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