Results 111 to 120 of about 1,848 (133)

[Study on structure, charge and spectrum for para-halogenated diphenyl ethers through density functional theory].

Guang pu xue yu guang pu fen xi = Guang pu, 2015
The present paper mainly researched the molecular geometry, charge distribution and spectrum vibration of diphenyl ether and its 3 kinds of para-halogenated diphenyl ethers based on density functional theory (DFT). The infrared and Raman spectrum vibration frequency for para-halogenated diphenyl ethers was calculated based on respective optimal ...
Long, Jiang, Xiao-Yu, Cai, Chen, Zhang, Qiao, Zou, Yu, Li   +4 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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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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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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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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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
openaire   +1 more source

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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Aerobic Degradation by Bacteria of Dibenzo-p-Dioxins, Dibenzofurans, Diphenyl Ethers and Their Halogenated Derivatives

1998
Polychlorinated dibenzo-p-dioxins (PCDDs) and dibenzofurans (PCDFs) are not produced on a massive scale like basic chemicals, plastic material, dyes, explosives, pesticides and other materials. Rather, this class of compounds is generated during combustion of chlorine-containing organic material.
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The Taeniacidal Activity of Seven Halogenated Diphenyl Methanes, a Diphenyl Propane and a Diphenyl Ether

The Journal of Parasitology, 1953
K B, KERR, H E, GREEN
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Biomagnification of polybrominated diphenyl ethers and alternative halogenated flame retardants through food chains of yellowfin tuna (Thunnus albacares) and their prey from the South China Sea and the associated potential health risk

Science of The Total Environment
Polybrominated diphenyl ethers (PBDEs) and their alternative halogenated flame retardants (AHFRs) have gained global attention due to their ubiquitous occurrence, bioaccumulation, and toxic properties. However, the biomagnification of halogenated flame retardants (HFRs), particularly AHFRs, in various food chains is not yet well understood.
Run-Xia, Sun, Chang-Gui, Pan, Feng-Jiao, Peng, Zhong-Biao, Chen, Yue, Sun, Jiang-Tao, Fan, Jun, Zhang, Bi-Xian, Mai   +7 more
openaire   +2 more sources