Results 151 to 160 of about 6,484 (191)

Halogenated diphenyl ethers identified in avian tissues and eggs by GC/MS

Chemosphere, 1983
Abstract Chlorinated and brominated diphenyl ether compounds (DPEs) have been detected by gas Chromatography/ mass spectrometry (GC/MS) in eggs and carcasses of fish-eating birds from Louisiana, Michigan, Ohio, Rhode Island, Texas, Virginia, and Ontario, Canada.
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Polybrominated diphenyl ethers and alternative halogenated flame retardants in mollusks from the Chinese Bohai Sea: Levels and interspecific differences

Marine Pollution Bulletin, 2019
Polybrominated diphenyl ethers (PBDEs) and alternative halogenated flame retardants (AHFRs) were measured in eleven mollusk species collected from the Chinese Bohai Sea. PBDEs and AHFRs were detected in all species, and their average total concentrations were in the range of 22.5-355 and 10.0-84.3 ng/g lipid weight, respectively.
Lingfang, Fu, Jie, Pei, Yuyu, Zhang, Xiaogu, Cheng, Shenxing, Long, Lixi, Zeng   +5 more
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Halogen‐Bonding Interactions of Polybrominated Diphenyl Ethers and Thyroid Hormone Derivatives: A Potential Mechanism for the Inhibition of Iodothyronine Deiodinase

Chemistry – A European Journal, 2017
AbstractPolybrominated diphenyl ethers (PBDEs) increase flame resistance in consumer goods, but these compounds and their hydroxylated derivatives (OH‐BDEs) impair normal thyroid function. Halogen bonding (XB) of PBDEs to an active site selenocysteine may prevent iodothyronine deiodinase(Dio)‐catalyzed activation/deactivation of thyroid hormone (TH ...
Eric S. Marsan, Craig A. Bayse
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Bioaccumulation of Polybrominated Diphenyl Ethers and Alternative Halogenated Flame Retardants in a Vegetation–Caribou–Wolf Food Chain of the Canadian Arctic

Environmental Science & Technology, 2018
The trophodynamics of halogenated flame retardants (HFRs) including polybrominated diphenyl ethers (PBDEs) and alternative HFRs were investigated in the terrestrial, vegetation-caribou-wolf food chain in the Bathurst Region of northern Canada. The greatest concentrations in vegetation (geometric mean of lichens, moss, grasses, willow, and mushrooms ...
Adam D. Morris, Derek C. G. Muir, Keith R. Solomon, Camilla F. Teixeira, Mark D. Duric, Xiaowa Wang   +5 more
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Concentrations and variability of organophosphate esters, halogenated flame retardants, and polybrominated diphenyl ethers in indoor and outdoor air in Stockholm, Sweden

Environmental Pollution, 2018
We investigated the concentrations and temporal variability of organophospate esters (OPEs), halogenated flame retardants (HFRs) and polybrominated diphenyl ethers (PBDEs) in indoor and outdoor urban air in Stockholm, Sweden over one year (2014-2015) period.
Fiona, Wong, Cynthia A, de Wit, Seth R, Newton   +2 more
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Relative reactivities of the functional groups involved in synthesis of poly(phenylene ether sulphones) from halogenated derivatives of diphenyl sulphone

Polymer, 1972
Initial rate constants for the self condensation of halogenophenoxides (111) in anhydrous dimethyl sulphoxide were also determined. The order of halogen reactivities found was F>CI~Br with p-halogenophenyl sulphonyl groups showing greater reactivity than the o-isomers, while displacement from the m-halogeno sulphones was very slow and comparable with ...
A.B. Newton, J.B. Rose
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Acute oral toxicity and liver oxidant/antioxidant stress of halogenated benzene, phenol, and diphenyl ether in mice: a comparative and mechanism exploration

Environmental Science and Pollution Research, 2013
The lethal doses (LD50s) of fluorinated, chlorinated, brominated, and iodinated benzene, phenol, and diphenyl ether in mice were ascertained respectively under the consistent condition. The acute toxicity of four benzenes orders in fluorobenzene (FB) 
Jiaqi, Shi, Mingbao, Feng, Xuesheng, Zhang, Zhongbo, Wei, Zunyao, Wang   +4 more
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Historical trends and ecological risks of polybrominated diphenyl ethers (PBDEs) and alternative halogenated flame retardants (AHFRs) in a mangrove in South China

Science of The Total Environment, 2017
While the production of polybrominated diphenyl ethers (PBDEs) was gradually phased out in the last decade, they may still pose hidden danger to the environment due to their toxicity and persistence. On the other hand, alternative halogenated flame retardants (AHFRs) have been increasingly used as substitutes for PBDEs and may further worsen ...
Qihang, Wu, Xucheng, Liu, Chaozong, Liang, Jonathan Y S, Leung, Huosheng, Li, Shejun, Chen, Bixian, Mai, Shenyu, Miao, Yongheng, Chen, Zhifeng, Wu, Zhanghe, Chen   +10 more
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Relationship between structure and retention of polychlorinated diphenyl ethers (PCDE) in HRGC in comparison with other groups of halogenated aromatic compounds

Fresenius' Journal of Analytical Chemistry, 1994
The GC-retention of 106 polychlorinated diphenyl ethers (PCDE) has been examined on five different stationary phases representing a broad range of polarities: CP Sil8/10%C18 (Sil8-type with 10% of octadecyl groups), SE 54 (methyl-/5% phenyl-polysiloxane), OV 1701 (7% phenyl-/7% cyanopropyl-polysiloxane), DB Dioxin (a polysiloxane phase, which ...
J. Kurz, K. Ballschmiter
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Challenges of gas chromatography–high‐resolution time‐of‐flight mass spectrometry for simultaneous analysis of polybrominated diphenyl ethers and other halogenated persistent organic pollutants in environmental samples

Journal of Separation Science, 2005
AbstractThe potential of a gas chromatographic method employing high‐resolution time‐of‐flight (TOF) mass spectrometry was evaluated for detection of polybrominated diphenyl ethers (PBDEs) in the environmental matrices represented by fish and river sediment. Two ionisation techniques, viz.
Tomás, Cajka, Jana, Hajslová, Radek, Kazda, Jan, Poustka   +3 more
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