Interaction between co‐solvents and algae in the residue dynamics of fenitrothion |
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Authors: | Pearl Weinberger Dan Sher Roy Greenhalgh |
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Institution: | 1. Biology Department , University of Ottawa , Ottawa, Ontario, KlN 6N5;2. Chemistry and Biology Research Institute , Agriculture Canada , Ottawa, Ontario, K1A 0C6 |
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Abstract: | Abstract Fresh and estuarine water algae maintained in laboratory microcosms simulating river‐lake/estuary‐bay systems were exposed to 14C‐fenitrothion formulated with Atlox and tank mixed with Aerotex or Dowanol (11.5:1.5:1.5 w/v/v). Generally, the tank mix co‐solvents determined the amount of uptake and the array of derivatives formed by the algae. Typically, exposed to an Aerotex mix the ratio of ethyl acetate extractable (NP) fraction : ethyl acetate unextractable (P) fraction was as 3.5:1.0, exposed to a Dowanol mix the ratio was as 1.5:1.0. Within any comparable time period, fresh water algae turned over more of the C‐ring of fenitrothion than the estuarine genera. Turn‐over was enhanced when Aerotex was the tank mix co‐solvent. |
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Keywords: | fenitrothion bioaccumulation algae turn‐over |
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