Objective: Exposure to polychlorinated biphenyls (PCBs) is considered to have culminated between 1950 and 1970 in Japan, and exposure through diet, the major exposure route, has decreased significantly over the last 10 years. The primary goal of the present study was to investigate the long-term trends and congener profiles of serum and dietary levels of PCBs using historical samples.
Methods: Using banked samples collected in 1980, 1995, and 2003 surveys, we determined the daily intakes and serum concentrations of 13 PCB congeners (#74, #99, #118, #138, #146, #153, #156, #163, #164, #170, #180, #182, and #187) in women.
Results: The total daily PCB intake [ng/day, geometric mean (geometric standard deviation)] decreased significantly from 523 (2.5) in 1980 to 63 (3.2) in 2003. The serum total PCB level (ng/g lipid) in women <40 years of age decreased significantly from 185 (1.8) in 1980 to 68 (1.8) in 2003. In contrast, the level in women >50 years of age increased significantly from 125 (1.7) in 1980 to 242 (1.7) in 2003. Specifically, the serum concentrations of hexa (#138, #146, #153, #156, #163, and #164) and hepta (#170, #180, #182, and #187) congeners increased significantly. A comparison of the serum PCB levels of women born from 1940 to 1953 revealed that their serum total PCB level was significantly higher in the 2003 survey [242 (1.7), n = 9] than in the 1995 [128 (2.0), n = 17] surveys. This increase in the total PCB level was attributable to increases in the hepta congener groups.
Conclusion: Present results suggest a decreased rate of elimination of hepta congeners with aging in females, rather than a birth-generation phenomenon.
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http://dx.doi.org/10.1007/s12199-009-0089-6 | DOI Listing |
Sci Total Environ
December 2024
Environmental Monitoring Division, City of Los Angeles, 12000 Vista Del Mar, Playa Del Rey, CA 90293, USA; Department of Health Sciences and Sciences, University of California - Los Angeles, Los Angeles, CA 90024, USA. Electronic address:
Polychlorinated biphenyl (PCB) congeners, sold commercially as different mixtures under the trade name Aroclor in the USA, pose ecological and public health hazards. In the environment, they are monitored as Aroclors for potential source tracking and more accurately as congeners to understand the extent of PCB contamination in total. Because of the subjectivity with which Aroclors are currently identified in samples, striving towards clarity is a focus for analytical chemists.
View Article and Find Full Text PDFInt J Biometeorol
December 2024
School of Landscape Architecture, Zhejiang Agricultural and Forestry University, Hangzhou, 311300, China.
The surface color and materials of sidewalk pavements exhibit different albedo characteristics, leading to varied surface urban heat island effects in subtropical regions. To quantify the effect of pavement surface color and material on SUHI, Prefabricated Concrete Structure brick (PCB), Granite brick (GB) and Dutch brick (DB) totaling 14 pavement samples in Hangzhou were placed under unshaded, cloud shaded and tree shaded conditions. CIELAB (International Commission on Illumination L*a*b*) color data, short-wave radiation (incoming and outgoing) and surface temperature were measured.
View Article and Find Full Text PDFSci Total Environ
December 2024
Osaka University, Research Center for Environmental Preservation, Japan.
The objective of this study was to analyze the concentrations of polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs) in infant food (infant formulas and human milk) collected in Serbia and to assess their exposure and associated health risks. A total of 101 PCB congeners and 26 PBDE congeners were analyzed. In infant formulas (IF), the total PCB levels averaged 63.
View Article and Find Full Text PDFSci Total Environ
December 2024
Center for Marine Environmental Studies (CMES), Ehime University, Bunkyo-cho 2-5, Matsuyama, Ehime 790-8577, Japan. Electronic address:
In recent years, there has been growing concern about the long-term health effects of chemical exposure in pets, particularly dogs and cats, from sources such as pet food and house dust. Domestic cats (Felis silvestris catus) and dogs (Canis lupus familiaris) are continuously exposed to polychlorinated biphenyls (PCBs), with particular attention being paid to the toxicity of their metabolites, hydroxylated PCBs (OH-PCBs) and methylsulfonyl PCBs (MeSO-PCBs). However, the tissue distribution and species-specific differences of these PCB metabolites in domestic animals have not been fully elucidated.
View Article and Find Full Text PDFSci Total Environ
December 2024
Department of Environmental Science, Rutgers, the State University of New Jersey, United States of America. Electronic address:
Polychlorinated dibenzo-p-dioxins and -furans (PCDD/Fs) are contaminants of concern in the New York/New Jersey Harbor and in the organisms of the Newtown Creek Superfund site, which lies within the harbor. Because PCDD/Fs are never intentionally produced, identifying their sources can be challenging. In this work, sources of PCDD/Fs to the sediment of Newtown Creek were investigated using Positive Matrix Factorization (PMF) to analyze two data sets containing data on concentrations of (1) PCDD/Fs and (2) PCDD/Fs plus polychlorinated biphenyls (PCBs).
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