On April 10, 2021, He, Ke; Hain, Ethan; Timm, Anne; Blaney, Lee published an article.Product Details of 6197-30-4 The title of the article was Bioaccumulation of estrogenic hormones and UV-filters in red swamp crayfish (Procambarus clarkii). And the article contained the following:
Estrogenic hormones and organic UV-filters (UV-filters) have attracted increased attention as endocrine disrupting chems. (EDCs) due to their potent estrogenicity and widespread occurrence in the environment. This study investigated the accumulation of three estrogenic hormones and five UV-filters in red swamp crayfish (Procambarus clarkii). Exposure experiments were conducted for 42 days with a mixture of EDCs at two environmentally-relevant design concentrations (i.e., 500 and 5000 ng L-1). The aqueous-phase EDC concentrations decreased over time and were re-established every two days. Within 14 days of exposure, the five UV-filters were measured at 2.2 to 265 ng g-1 (dry weight) in crayfish tail tissue. Only one estrogenic hormone, 17β-estradiol, was detected in the crayfish at 10.4-13.5 ng g-1. No apparent changes were observed for EDC concentrations in the tail tissue over the next four weeks of exposure. The apparent bioaccumulation factors for the EDCs ranged from 23 L (kg tail tissue, dry weight)-1 for 4-methylbenzylidene camphor to 1050 L (kg tail tissue, dry weight)-1 for 2-ethylhexyl-4-methoxycinnamate. EDC input was stopped after 42 days, and the more hydrophobic UV-filters (i.e., octocrylene, 2-ethylhexyl-4-methoxycinnamate, homosalate) were found to be persistent throughout a 14-d elimination period. A lyticase-assisted yeast estrogen screen demonstrated that the residual estrogenic activity of water samples aligned with (or was lower than) predictions from targeted chem. anal. These results suggest that the transformation products did not contribute significant estrogenicity, although further anal. of endocrine disruption outcomes in crayfish is recommended. The experimental process involved the reaction of 2-Ethylhexyl 2-cyano-3,3-diphenylacrylate(cas: 6197-30-4).Product Details of 6197-30-4
The Article related to procambarus bioaccumulation uv filter estrogen hormone, bioaccumulation, crayfish, endocrine disrupting chemicals, estrogenic hormones, sunscreen, uv-filters, Toxicology: Chemicals (Household, Industrial, General) and other aspects.Product Details of 6197-30-4
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