Results 91 to 100 of about 1,848 (133)

Synthesis of halogenated diphenyl ethers and dibenzofurans - A discussion of specific isomers available

Chemosphere, 1981
Abstract Synthetic routes for the preparation of halogenated diphenyl ethers and dibenzofurans are reviewed, and isomers reported in the literature are listed. In addition, the routes preferred for the synthesis of specific chlorinated isomers - especially from the point of view of an unambiguous structural assignment - are discussed in detail.
Kurt Andersson, Åke Norström
exaly   +2 more sources

Structural studies of halogenated diphenyl ethers from a marine sponge

Journal of the Chemical Society Perkin Transactions 1, 1981
The structures of two halogenated diphenyl ethers from a marine sponge have been assigned from spectroscopic and X-ray crystallographic evidence. The two compounds have been identified as 3,5-dibromo-4-chloro-2-(2,4-dibromophenoxy) phenol (1) and 3,5-dibromo-2-(2,4-dibromophenoxy)phenol (2).
Rob Capon, Emilio L Ghisalberti
exaly   +5 more sources

Analysis of polybrominated diphenyl ethers and emerging halogenated and organophosphate flame retardants in human hair and nails

Journal of Chromatography A, 2015
A method for the digestion, extraction, fractionation, and analysis of three classes of flame retardants, including 36 polybrominated diphenyl ethers (PBDEs), 9 halogenated alternative flame retardants (AFRs), and 12 organophosphate esters (OPEs) in human hair and nail samples was developed.
Liang-Ying Liu, Ronald Hites, Ka He
exaly   +3 more sources

Bioaccumulation of polybrominated diphenyl ethers and several alternative halogenated flame retardants in a small herbivorous food chain

Environmental Pollution, 2013
Little is known about the bioaccumulation behavior of polybrominated diphenyl ethers (PBDEs) and other halogenated flame retardants (HFRs) in plants and in herbivores. In the present study, PBDEs and several alternative HFRs (AHFRs) were examined in a small herbivorous food chain (paddy soils-rice plant-apple snails) from an electronic waste recycling ...
Bi-Xian Mai, Xiaojun Luo, Ying Peng
exaly   +3 more sources

Prediction of vapour pressures for halogenated diphenyl ether congeners from molecular descriptors

Environmental Science and Pollution Research, 2002
Polychlorinated diphenyl ethers (PCDE) and polybrominated diphenyl ethers (PBDE) have both been identified as environmental contaminants. The physical properties are important in determining the distribution and fate of organic contaminants in the environment.
Tomáš Öberg
exaly   +3 more sources

Occurrence and profiles of halogenated phenols, polybrominated diphenyl ethers and hydroxylated polybrominated diphenyl ethers in the effluents of waste water treatment plants around Huang-Bo Sea, North China

Science of the Total Environment, 2018
Halogenated organic pollutants (HOPs), as ubiquitous environment contaminants, have attracted increasing concerns due to the potential adverse health impacts on organisms and even humans. Waste water treatment plants (WWTPs) are one source of HOPs to the environment through their discharge of treated effluent.
Sisi Liu, Yuntao Wang, Hongxia Zhao
exaly   +3 more sources

Polybrominated diphenyl ethers and alternative halogenated flame retardants in mangrove plants from Futian National Nature Reserve of Shenzhen City, South China

Environmental Pollution, 2020
Halogenated flame retardants (HFRs) are ubiquitous in the environment, but little information is available about the bioaccumulation of HFRs in mangrove plants. In this study, three mangrove plant species were collected from Futian National Nature Reserve of Shenzhen City, South China to investigate the bioaccumulation of polybrominated diphenyl ethers
Bi-Xian Mai, Xiaojun Luo, Zai-Wang Zhang   +2 more
exaly   +3 more sources

Contamination and distribution of heavy metals, polybrominated diphenyl ethers and alternative halogenated flame retardants in a pristine mangrove

Marine Pollution Bulletin, 2016
Owing to the expanding metal and electronics industries, pollution in the Pearl River Estuary needs special concern. Given the hydrodynamic effect, the pristine mangrove in Qi'ao Island would be contaminated by tidal flushing. Thus, we examined (1) the contamination of pollutants in this mangrove, including heavy metals, polybrominated diphenyl ethers (
Jonathan Y S Leung, Yisheng Peng, Xinhua Geng   +2 more
exaly   +4 more sources

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.
Lixi Zeng, Lingfang Fu
exaly   +3 more sources

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 ...
Jonathan Y S Leung, Bi-Xian Mai, Shejun Chen   +2 more
exaly   +3 more sources