Track topics on Twitter Track topics that are important to you
Tree bark samples were collected from 15 sites across Western China in 2013, and the polybrominated diphenyl ether (PBDE) and new polybrominated flame retardant (NBFR) concentrations in the samples were determined. The mean total PBDE concentration was 51.8 ng/g lipid weight (lw), 85.2-99.4% lower than Chinese eastern coastal areas and the E-waste recycling areas, BDE209 was the dominant PBDE congener, and its mean concentration was 49 ng/g lw. The mean 2,3,5,6-tetrabromo-p-xylene, pentabromobenzene, pentabromotoluene, and hexabromobenzene concentrations were 0.61, 0.97, 0.68, and 0.68 ng/g lw, respectively. The PBDE and NBFR concentrations in the air at the sampling sites were estimated from the concentrations in the tree bark samples. The estimated mean total PBDE and total NBFR concentrations in air were 58.5 and 2.76 pg/m(3) , respectively. The sources of NBFR emissions were found to be different from the sources of PBDE emissions for no relationship was found between the NBFR and PBDE concentrations, and it appeared that sources of measured HBB, PBBz, and PBT in tree bark in Western China include industrial activity related to the aluminum industry. This article is protected by copyright. All rights reserved.
This article was published in the following journal.
Name: Environmental toxicology and chemistry / SETAC
In this study, pine needles were used as biomonitors to investigate the levels, spatial distributions, and possible sources of polybrominated diphenyl ethers (PBDEs) and four emerging halogenated flam...
Polybrominated diphenyl ethers (PBDEs) have not been studied in relation to incident pregnancy loss in human populations, despite their ubiquitous exposure and purported reproductive toxicity.
Hexabromocyclododecane (HBCD), tetrabromobisphenol A (TBBPA) and polybrominated diphenyl ether (PBDEs) are three legacy brominated flame retardants (BFRs); however, they are still produced and used in...
The occurrence levels of eight polybrominated diphenyl ethers (PBDEs) and four novel brominated flame retardants (NBFRs) were determined and compared in indoor dust from different microenvironments (2...
The study will explore whether if the use of Orlistat results in weight loss that is accompanied by a reduction in the body burdens of polybrominated biphenyls (PBB) and other Persistent O...
The purpose of this study is to investigate the efficacy of Flavangenol® (Toyo Shinyaku, Japan), a pine bark extract, in lowering blood pressure and improving glycemic control and plasma ...
The purpose of the study is to investigate the relationship between environmental agents and reproductive health. Environmental agents of interest include exposure to chemicals such as pol...
Mild to moderate facial acne is an extremely common disease of teenagers and young adults. This pilot study will investigate whether treatment with a gel containing tea tree oil reduces nu...
Allergen-specific immunotherapy (SIT), the administration of gradually increasing quantities of an allergen extract to an allergic patient, is a curative approach which directly treats the...
Compounds that contain two halogenated benzene rings linked via an OXYGEN atom. Many polybrominated diphenyl ethers are used as FLAME RETARDANTS.
Biphenyl compounds which are extensively brominated. Many of these compounds are toxic environmental pollutants.
Materials applied to fabrics, bedding, furniture, plastics, etc. to retard their burning; many may leach out and cause allergies or other harm.
Pyrolysis of organic compounds at the temperature of a hydrogen-air flame to produce ionic intermediates which can be collected and the resulting ion current measured by gas chromatography.
A plant genus in the LAURACEAE family. The tree bark has been used medicinally.