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14 Cards in this Set
- Front
- Back
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What are PBDEs and are they regulated?
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polybrominated diethyl ethers; unregulated chemicals in active use
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What are they expected to bioaccumulate?
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due to their high lipophilicity and persistence
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Why are marine mammals an important tool for monitoring pollution of the marine environment world wide?
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due to their position at the top of the aquatic food chain and their relatively long life-spans
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How was fat removed from the samples?
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gel permeation and florisil chromatography in a single automated system
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How was seal age determined?
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positive correlation reported beween organochlorine residues and age at the time of sampling, so partial regression analysis was used to compare PBDE resisdue levels to age
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How would you describe the relationship between abdominal tissue and adipose issue contaminant concentrations?
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abdominal and breast concentrations were highly correlated with no bias
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Blubber is used for what by marine mammals?
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insulation from cold marine waters and as a lipid storage depot
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Is blubber thickness directly correlated with lipid content of the tissue? Why or why not?
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no
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Which lipid fraction of seal blubber is the primary site of organochorine accumulation?
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triglycerides
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Graph the trend that describes the relationship between time and PBDE concentrations observed in the author's seal samples
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positive trend
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What have Addison and Brodie contributed to our understanding of transplacental PCB transfer? graphically represent
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presented a formula for predicting PCB transfer during gestation that inversely relates transfer efficiency to lipid solubility of individual PCB congeners
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What was the dominant PBDE congener in seals? Humans?
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PBDE 47
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How do the PBDE levels reported in the harbor seals compare to other reported levels of PBDEs in seals?
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among the highest reported
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How do the PBDE levels reported in the humans compare to other reported levels of PBDEs in humans?
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is the highest reported to date
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