Alteration of Diastereoisomeric and Enantiomeric Profiles of Hexabromocyclododecanes (HBCDs) in Adult Chicken Tissues, Eggs, and Hatchling Chickens
| Autor: | Yuxin Sun, Jing Zheng, Lin Qiao, Xiao-Jun Luo, Qilai Xie, Runxia Sun, Bi-Xian Mai, Xiaobo Zheng |
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| Rok vydání: | 2017 |
| Předmět: |
0301 basic medicine
medicine.medical_specialty Meat animal structures Eggs Food Contamination 010501 environmental sciences Biology 01 natural sciences Soil 03 medical and health sciences Animal science Dry weight Chicken Liver Internal medicine medicine Animals Environmental Chemistry Incubation Hatchling Flame Retardants 0105 earth and related environmental sciences Stereoisomerism General Chemistry Animal Feed Hydrocarbons Brominated 030104 developmental biology Endocrinology embryonic structures Enantiomer Chickens |
| Zdroj: | Environmental Science & Technology. 51:5492-5499 |
| ISSN: | 1520-5851 0013-936X |
| DOI: | 10.1021/acs.est.6b06557 |
| Popis: | The concentrations and enantiomer fractions (EFs) of α-, β-, and γ-hexabromocyclododecanes (HBCDs) were measured in chicken diet sources (soil and chicken feed), home-raised adult chicken (Gallus domesticus) tissues, eggs during incubation, and hatchling chicken tissues. HBCD concentrations were not detected-0.69 ng/g dry weight (dw) and 25.6-48.4 ng/g dw in chicken feed and soil, respectively. HBCDs were detected in all adult chicken tissues, except the brain, at median levels of 13.1-44.0 ng/g lipid weight (lw). The proportions of α-HBCD in total HBCDs increased from 51% in soil to more than 87% in adult chicken tissues. The accumulation ratios (ARs) of α-HBCD from diet to adult chicken tissues were 4.27 for liver, 11.2 for fat, and 7.64-12.9 for other tissues, respectively. The AR and carry-over rate (COR) of α-HBCD from diet to eggs were 22.4 and 0.226, respectively. The concentrations of α-HBCD in hatchling chicken liver (median: 35.4 ng/g lw) were significantly lower than those in hatchling chicken pectoral muscle (median: 130 ng/g lw). The EFs of α-HBCD decreased from soil to adult chicken tissues and from eggs to hatchling chicken liver. Meanwhile, the EFs of γ-HBCD increased from soil to adult chicken tissues. These results indicate the preferential enrichment of (-)-α-HBCD and (+)-γ-HBCD in chickens. The alteration of diastereoisomeric and enantiomeric patterns of HBCDs might be influenced by the different absorption and elimination rates of the six HBCD enantiomers as well as variations in HBCD metabolism in chickens. |
| Databáze: | OpenAIRE |
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