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hepta- |
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hepta- word element. [Gr.] seven. |
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? Mentioned in | ? References in periodicals archive | |
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| FDA analyses since 1979 for more highly chlorinated dioxins have turned up hepta- and octa-chlorinated species in eggs, bacon, chicken, pork chops and beef liver--contamination that the researchers say appears to be related to agricultural use of pentachlorophenol. Inhibition of ER activation by hexa-, hepta- and octachlorinated biphenyls and suppression of estrogenic signaling found in serum of males chronically exposed to PCBs (Figures 3-5) suggest that PCB 153 and other prevalent congeners could contribute to overall antiestrogenic response. We used an HP6890 (gas chromatograph)--HP5973 (mass spectrometer) (Hewlett Packard) equipped with SP-2331 fused silica capillary column (60 pm internal diameter) to analyze tetra- to hexachlorinated PCDD/PCDFs, and a DB5 column (30 [micro]m internal diameter) to determine hepta- and octachlorinated isomers. |
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hepta-
