Results 151 to 160 of about 2,694 (171)

Formation of polychlorinated naphthalenes from chlorophenols

Proceedings of the Combustion Institute, 2005
Abstract To test the hypothesis that polychlorinated naphthalenes (PCNs) can be formed from chlorinated phenols via cyclopentadienyl radicals in post-combustion gas containing 8% oxygen, the slow combustion of three chlorophenols (CPs) at 600 °C was studied in a laminar flow reactor. Contrary to the a priori hypothesis, different distributions of PCN
Do Hyong Kim, James A. Mulholland, Jae-Yong Ryu   +2 more
openaire   +1 more source

Seasonal variation of atmospheric polychlorinated biphenyls and polychlorinated naphthalenes in Japan

Atmospheric Environment, 2013
Abstract This study investigated the seasonality of atmospheric polychlorinated biphenyls (PCBs) and polychlorinated naphthalenes (PCNs) in Japan. Polyurethane foam (PUF) disk passive air samplers (PAS) were deployed simultaneously at 55 sites in spring 2008, summer 2008 and winter 2008/09. Sampler deployment spanned 8 continuous weeks in each season.
Jonathan N. Hogarh, Nobuyasu Seike, Yuso Kobara, Shigeki Masunaga   +3 more
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Polychlorinated naphthalene concentrations in human serum caused by unintentional production and emissions, and potential effects of polychlorinated naphthalenes on thyroid hormones

Science of The Total Environment, 2022
The concentrations of 75 polychlorinated naphthalene (PCN) congeners in 95 human serum samples from the Fengjiang electronic waste dismantling area and Huangyan District in Taizhou City (Zhejiang Province, China) were determined. Thyroid hormone (FT3, FT4, TSH, and TRH) concentrations in the samples were also determined. The total PCN concentrations in
Shijie, Wang, Jingxi, Jin, Chen, Guo, Zhigang, Li, Tong, Xu, Xinyu, Wen, Jicheng, Hu, Ying, Wang, Yongjie, Wei, Jun, Jin   +9 more
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Analysis of polychlorinated naphthalenes in environmental samples

Chemosphere, 1984
Abstract A method for the analysis of polychlorinated naphthalenes (PCN) has been developed. It is based on a simple clean-up procedure using activated carbon and a mass fragmentographic analysis using the negative ions formed during chemical ionization (NCI). Unlike the technical PCN products we have analyzed, a few isomerides containing four to six
Bo Jansson, Lillemor Asplund, Mats Olsson   +2 more
openaire   +1 more source

Formation of polychlorinated naphthalenes on fly ash

Chemosphere, 1998
Abstract During the oxidative degradation of carbonaceous material on fly ash, besides PCDD/F, PCPh, PCBz, PCB, polychlorinated naphthalenes (PCN or ClxN) are formed. Thermal experiments were carried out with fly ash from a municipal waste incinerator at 300°C and reaction times of 0.5 h up to 4 h.
Schneider, M., Stieglitz, L., Will, R., Zwick, G.   +3 more
openaire   +1 more source

Polychlorinated naphthalenes (PCNs) in foods: sources, analytical methodology, occurrence and human exposure

2013
Polychlorinated naphthalenes (PCNs) have long been recognised as legacy contaminants originating through releases from electrical equipment and industrial chemicals and processes. In recent years, the advances in measurement techniques have allowed characterisation of total PCN occurrence, yielding more specific concentration data including individual ...
Fernandes, A., Rose, Martin
openaire   +2 more sources

Analysis of polychlorinated naphthalenes, polychlorinated biphenyls and polychlorinated terphenyls via carbon skeleton gas-liquid chromatography

Journal of Chromatography A, 1978
Mixtures of polychlorinated naphthalenes (PCNs), polychlorinated biphenyls (PCBs) and organo-chlorine pesticides have been determined by carbon skeleton gas chromatography (GC)-Polychlorinated terphenyls (PCTs) have also been investigated. Using hydrogen as the carrier gas, on-column catalytic reduction of PCNs to naphthalene was quantitative for a 3 ...
Michael Cooke, Graham Nickless, Aileen M. Prescott, David J. Roberts   +3 more
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Polychlorinated naphthalene concentrations and distribution in feed raw materials

Chemosphere, 2018
Concentrations and patterns of 75 PCN congeners in feed raw materials of animal and plant origin were investigated. Six types of feed raw materials of animal origin and three types of feed raw materials of plant origin from China were collected in 2016.
Shujun, Dong, Xiaomin, Li, Peilong, Wang, Xiaoou, Su   +3 more
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Accumulation of polychlorinated naphthalenes in domestic animal related samples

J. Environ. Monit., 2004
Concentrations of polychlorinated naphthalene (PCN) congeners were measured in domestic animal related samples such as feed ingredients, mixed feed and animal fat. Mean concentrations of total PCNs in feed ingredients ranged from 500 to 1500 pg g(-1) lipid wt with a high concentration found in fish meal.
Keerthi S, Guruge, Nobuyasu, Seike, Noriko, Yamanaka, Shigeru, Miyazaki   +3 more
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Polychlorinated naphthalenes, polychlorinated biphenyls and ΣDDT residues in British birds of prey

Science of The Total Environment, 1980
Abstract Tissue samples (muscle, liver and kidney) from small raptors (kestrels) have been extracted by steam extraction into hexane and the levels of ΣDDT, PCB, PCN and PCT determined by carbon skeleton-gas chromatography. A 3% palladium catalyst, and a 2% RbCl salt column coupled to a mass spectrometer were used for the determination.
Michael Cooke, David James Roberts, Mary E. Tillett   +2 more
openaire   +1 more source