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이성희,여현구 忠州大學校 2010 한국교통대학교 논문집 Vol.45 No.-
Polybrominated diphenyl ethers(PBDEs) was measured in soil samples of Ansung in Kyonggi-province to investigate concentration characteristics of PBDEs. Total concentration of PBDE were 2,205.3 pg/g dry weight (DW) in soil sample. BDE-209 showed as the most abundant congener in soil samples which was related to imported amount and usage amount of deca-BDE technical mixture in Korea. Also, BDE-99, BDE-47, BDE-100 deposition in soil sample was higher than other congeners and was related to the imported and usage amount reported for penta-BDE technical mixture in Korea. Correlation coefficient between PBDE contribution and technical mixture formulation(Bromokal 70-5DE) were significant(r=0.91, p<0.01) which suggests the influence of sources in this technical mixtures.
이성희,여현구 忠州大學校 2008 한국교통대학교 논문집 Vol.43 No.-
Atmospheric concentrations of polychlorinated biphenyls (PCBs) were measured in rural of Kyong-gi province in 2001 for every two week with long-term sampling period (10 days) with Anderson air sampler. The objectives of the research presented in this paper were to estimate characteristics of particle size distribution and gas/particle partitioning of PCBs in the atmosphere. Size distribution of total PCBs was tri-modal distribution, such as 7-11 µm, 3.3-4.7 µm, 0.43-0.65, which appeared with maximum fraction(%) of total PCBs in accumulation mode (0.43< dp <0.65). Octanol-air partitioning coefficient and subcooled vapor pressure were good predictors of gas/particle partitioning of PCBs.
Gas/Particle Level and Dry Deposition Flux of Atmospheric PCBs
Yeo, Hyun-Gu,Park, Ki-Chul Korean Society of Environmental Health 2003 한국환경보건학회지 Vol.29 No.4
Atmospheric samples were conducted from September 2001 to July 2002 with GPS-l PUF sampler in rural site to concentration distributions of gas/particle PCBs and to calculate dry deposition flux of PCBs. $\Sigma$PCBs concentrations of gas/particle PCBs were 59.29$\pm$48.83, 6.56$\pm$6.59 pg/㎥, respectively. Gas contribution (%) of total PCBs (gas + particle) was 90% which existed gas phase in the atmosphere. The particle contribution (%) of PCB congeners increased relatively more of the less volatile congeners with the highest chlorine number. The correlation coefficients (r) between total PCBs and temperature ($^{\circ}C$) showed negative correlation in - 0.62 (p<0.0l) for particle phase, positive correlation in 0.63 (p<0.01) for gas phase. In other word, particle phase PCBs is enriched in colder weather which could be due to greater in corporation of condensed gas phase at low temperature. The calculated dry deposition of total PCBs (gas + particle) was 0.008, 0.008 $\mu\textrm{g}$ $m^{-2}$ da $y^{-l}$ which showed maximum dry deposition flux in December, minimum data in July Bs in the atmosphere. The calculated dry deposition fluxes of total PCBs were influenced by particle phase PCBs even though PCBs in the atmosphere were present primarily in the gas phase.e.
Concentration and Seasonal Variation of Particle PCBs in Air
Yeo Hyun-Gu,Chun Man-Young Korean Society for Atmospheric Environment 2005 한국대기환경학회지 Vol.21 No.E1
Atmospheric concentrations of PCBs were monitored in Ansung-city, Kyonggi province during the 2001/2002 to characterize the concentration distribution and seasonal variation of particle polychlorinated biphenyls (PCBs). Average concentration of particle bound PCB showed maximum value for penta-CBs and minimum value for octa-CBs. Seasonal contributions $(%\)$ of total particle PCBs showed the highest value in winter months and lowest value in summer month, This result indicated that concentration of total particle PCBs increased with decreasing temperature in the atmosphere. Therefore, particle PCBs were easily formed by the condensation of gas phase PCBs in winter months. The total particle PCBs exhibited an inverse correlation with temperature (p<0.01) which suggested that particle PCBs were easily formed by condensation of gaseous PCBs in winter months.
Air-Soil Partitioning of PCBs in Rural Area
Hyun-Gu Yeo,Minkyu Choi,Man-Young Chun,Young Sunwoo 한국대기환경학회 2003 한국대기환경학회지 Vol.19 No.E1
The soil concentrations of polychlorinated biphenyls(PCBs) were measured at 12 sites in Ansung, Kyonggi province, Korea. Correlation coefficient(r) between total PCBs and organic matter content(OM) was significant(r=0.562, p<0.05). It suggests that organic matter may be a key factor of soil absorption of PCBs. The PCB concentrations of law chlorinated congeners with high vapor pressure were relatively abundant in air but high chlorinated congeners with low vapor pressure were mainly dominated by soil. The results indicated the influence of physicochmical properties of PCBs such as vapor pressure, octanal-air partition coefficient(K_OA). The calculated soil/air fugacity quotients suggested that the soil may be a source of heavier molecular PCBs(>penta-CBs) to the atmosphere, where lighter molecular PCBs appear to be affected by a movement from air to soil, especially tetra-CBs. Therefore, PCB homologs with low vapor pressure might have been influenced by revolatilization from soil.
Sudden cardiac death as a naturally-occurring ventricular hypertrophy in Macaca fascicularis
Hyeon-Gu Yeo,Junghyung Park,Hyun Kuk Kim,Joo Myung Lee,Bon-Sang Koo,Jeong-Hee An,Chang-Yeop Jeon,You Jung An,Won Seok Choi,Sung-Hyun Park,Jincheol Seo,Jinyoung Won,Keonwoo Kim,Jiyeon Cho,Yu Gyeong Kim 충북대학교 동물의학연구소 2021 Journal of Biomedical and Translational Research Vol.22 No.3