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- Fiedler, Heidelore, 1953-, et al.
(author)
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PCDD, PCDF, and PCB in farm-raised catfish from southeast United States - Concentrations, sources, and CYP1A induction
- 1998
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In: Chemosphere. - : Elsevier. - 0045-6535 .- 1879-1298. ; 37:9-12, s. 1645-1656
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Journal article (peer-reviewed)abstract
- Nine catfish fillets, three catfish nuggets, two feed samples, and one pond sediment were analyzed for PCDD, PCDF, and-PCB. Farm-raised catfish from Mississippi, Alabama, and Arkansas contained significant levels of 2,3,7,8-substituted PCDD and PCDF. In addition, a large number of non-2,3,7,8-substituted congeners were present in all samples. The catfish fillets and catfish nuggets also contained high concentrations of dioxin-like PCB, as well as a number of non-dioxin-like PCB. The TEQ based on PCDD and PCDF ranged from 9.5 to 43.0 pg/g lipid and the TEQ based on PCB ranged from 0.45 to 4.9 pg/g lipid for all catfish samples. The dioxin-like PCB contributed 4-16% to the total TEQ (PCDD/PCDF/PCB) for the catfish samples. The major source for the PCDD, PCDF, and PCB appears to be from feed and not from pond sediment. Immunoreactive CYP1A protein was elevated 2.5 fold in the pond-raised catfish compared to the aquarium-raised one. The results of this study suggest that the PCDD/PCDF are more important than the PCB in the CYP1A induction.
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- Bergek, Anna, 1973-, et al.
(author)
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Håller Sverige på att missa klimatutmaningens innovationspotential?
- 2008. - 1
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In: Ur startblocken. Svensk innovationskraft II. - Stockholm : Forum for innovation Management. - 9789163324093 ; , s. 159-168
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Book chapter (other academic/artistic)abstract
- Ur startblocken – Svensk innovationskraft II. I den här boken ger Forum for Innovation Management, FIM, en samlad bild av Sveriges förutsättningar som innovationsland nu och i framtiden. Bokens teman speglar fims seminarier och salongsdebatter under 2004–2007 och baseras på intervjuer och texter av tongivande personer i Innovationssverige, bland andra Ayad Al Saffar, Efva Attling, Leif Johansson, Lars G Josefsson, Margareta Norell Bergendal, Maud Olofsson, Alf Rehn, Lena Treschow Torell, Per Unckel och Thomas Östros. Boken avslutas med ett manifest riktat till Sveriges beslutsfattare i innovationsfrågor
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- Fiedler, Heidelore, 1953-, et al.
(author)
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Polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/PCDF) in food samples collected in southern Mississippi, USA
- 1997
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In: Chemosphere. - : Elsevier. - 0045-6535 .- 1879-1298. ; 34:5-7, s. 1411-1419
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Journal article (peer-reviewed)abstract
- n 1994, we analyzed 43 foodstuff samples from local supermarkets in southern Mississippi, USA, for PCDD/PCDF. 2,3,7,8-Cl4DD could be quantified in 31 of these samples. On a lipid basis, levels in meat (0.53-1.10 pg I-TEQ/g) and dairy products (0.42-1.10 pg I-TEQ/g) were slightly lower than those reported from other industrialized countries. While levels in dairy samples from the United States and Europe are comparable, there is a difference in the contribution of individual congeners to the I-TEQ: for example, in milk samples from Germany approximately 40% of the I-TEQ is due to the presence of 2,3,4,7,8-Cl5DF while in the Mississippi samples this congener only contributes 16%. The highest concentrations of PCDD/PCDF in our study were detected in the farm-raised catfish (10.2-27.8 pg I-TEQ/g). A unique finding was that in addition to the 2,3,7,8-substituted PCDD/PCDF the catfish samples contained many non-2,3,7,8-substituted congeners. This is unusual because vertebrate animals selectively eliminate or metabolize the non-2,3,7,8-substituted congeners.
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