• 제목/요약/키워드: PCB 52

검색결과 51건 처리시간 0.033초

PCBs의 식물에 대한 침착 특성 (The Characteristics of PCBs Deposition on Plants)

  • 김태욱;여현구;최민규;천만영
    • 한국환경농학회지
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    • 제20권2호
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    • pp.99-107
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    • 2001
  • 경기도 안성시에 소재한 한경대학교에서 1999년 7월부터 1999년 11월까지 식물과 대기중에서 PCBs의 농도 분포 및 침착특성을 조사하여 다음과 같은 결론을 얻었다. 1. 대기중 총 PCB 중 tri-CBs(PCB 28)과 tetra-CBs(PCB 52)가 차지하는 분율은 49%로 염소화가 덜 된 성분이 대기중에 존재하는 PCB congeners의 주요 성분임을 확인하였다. 2. 두 식물간의 PCB congeners별 상관계수(r)는 0.83 (P<0.01)으로 물리/화학적 특성이 다른 식물일지라도 주변 환경중에 잔류하는 PCB congeners별 오염도를 간접적으로 파악할 수 있는 passive sampler 역할을 하였다. 3. 두 식물종과 대기에서 PCB 110/PCB 52의 평균비는 각각 2.4(뽕), 부추(2.0) 및 0.5(대기)로 식물에서 PCB 110/PCB 52의 평균비가 대기 보다 높았는데 이는 PCB 110이 PCB 52에 비해 친지질성을 비롯한 생물학적 특성이 반영된 것으로 판단 되었다.

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환경호르몬 2,2',5,5'-Tetrachlorobiphenyl의 신경세포 독성에 대한 인삼의 방어효과 (Protective Effect of Korean Ginseng on Cytotoxicity Induced by 2,2',5,5'-Tetrachlorobiphenyl in Human Neuronal SK-N-MC Cells)

  • 황상구;김지수;이형철;이영찬;정영목;정우열;전병훈
    • 동의생리병리학회지
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    • 제16권1호
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    • pp.172-180
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    • 2002
  • Polychlorinated biphenyls(PCBs) are large scale industrial chemicals which are using in diverse applications. The goal of this study was to determine if exposure to 2,2',5,5'-tetrachlorobiphenyl (PCB 52) leads to an increase in the production of active oxidants, and subsequently promotes apoptosis of neuronal SK-N-MC cells. Reactive oxygen species (ROS) formation was examined in SK-N-MC cells after treatment of PCB 52 by concentrations and incubation times, respectively. It showed that the rate of ROS production in the cells was increased in a does-dependent manner to 45 min, followed by a return towards control levels after 120 min treatment. We also examined the association of PCB-induced apoptosis with the modulation of biomakers of oxidative damage to lipids (malondialdehyde [MDA]) in SK-N-MC cells. Increased MDA was observed in a dose-dependent manner in groups treated with 10, 15, and 20 figJ me of PCB 52 for 24 h. After treatment of PCB 52, the cells did not show any significant change in the rate of Cu/Zn-superoxide dismutase (Cu/Zn-SOD) activity. Whereas, the cells had a two-fold greater rate of change in catalase activity at 20 ㎍/㎖ of PCB 52 for 24 h when compared to control group. Korean Ginseng is one of the most important crude drugs which has been used as a traditional Oriental medicine. We next investigated protective effect of extracts of ginseng on cytotoxicity induced by PCB 52 in SK-N-MC cells. Pretreatment of SK-N-MC cells with 25-200 μg/ml of ginseng were reduced cell death in a dose-dependent manner in PCB 52-treated cells. To examine the sensitivity of beta-catenin to ginseng, the protective effect of a range of ginseng concentrations was examined in SK-N-MC cells treated with PCB 52. The result demonstrated that ginseng efficiently blocked PCB 52 inducible beta-catenin proteolysis in a concentration dependent manner. The ROS formation was also measured in the presences of extract of ginseng and superoxide dismutase (inhibitor of oxygen free radical production). The both SOD (400 U/ml) and ginseng (200 μg/ml) significantly inhibited RDS generation in PCB 52-treated group.

식품 중 indicator PCBs의 분포와 노출평가 (Distribution and exposure assessment of indicator PCBs in Food)

  • 오금순;서정혁;백옥진;박성수;나영준;안영순;김미혜;이광호
    • 분석과학
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    • 제23권3호
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    • pp.312-321
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    • 2010
  • 7개 indicator PCBs (IUPAC nos 28, 52, 101, 118, 138, 153, 180)는 2006년부터 2007년까지 한국인의 대표식품을 중심으로 곡류(백미), 육류, 알류, 우유와 유가공품, 수산물 및 그 가공품을 대상으로 동위원소희석법을 이용하여 분석하였다. 모든 식품들 중 어류(평균 39.8 ng/g)에서 가장 높게 검출되었고, 그 다음으로 우유 및 유가공품 (1.4 ng/g), 육류 (0.9 ng/g)이였다. 어류 중 갈치 15.4 ng/g, 삼치 5.4 ng/g, 조기 4.5 ng/g 및 고등어 4.4 ng/g가 검출되었다. 모든 식품에서 indicator PCBs의 비율은 PCB-153 35.8%, PCB-138 16.2%, PCB-101 16.1%, PCB-118 13.4%, PCB-180 8.8%, PCB-52 6.9% 및 PCB-28 2.9% 이었다. PCB-153과 138은 hexa-CB로서 분포가 가장 많았고, 다음으로는 penta-CB인 PCB-101과 118 이었다. 식품을 통한 indicator PCBs에 의한 인체의 평균 및 극단 노출량은 수산물 및 그 가공품이 50%를 차지하였다. 그러나 이 수준은 한국인의 건강에 위해를 끼치지 않은 수준으로 평가되었다.

Chlorination of ortho-position on Polychlorinated Biphenyls Increases Protein Kinase C Activity in Neuronal Cells

  • Lee, Youn-Ju;Yang, Jae-Ho
    • Toxicological Research
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    • 제28권2호
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    • pp.107-112
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    • 2012
  • Polychlorinated biphenyls (PCBs) are persistent and bioaccumulative environmental pollutants. Recently, it is suggested that neurotoxic effects such as motor dysfunction and impairment in memory and learning have been associated with PCB exposure. However, structure relationship of PCB congeners with neurotoxic effects remains unknown. Since PKC signaling pathway is implicated in the modulation of motor behavior as well as learning and memory and the role of PKC are subspecies-specific, we attempted to study the effects of structurally distinct PCBs on the total PKC activity as well as subspecies of PKC in cerebellar granule cell culture model. Cells were exposed to 0, 25 and 50 ${\mu}M$ of PCB-126, PCB-169, PCB-114, PCB-157, PCB-52 and PCB-4 for 15 min. Cells were subsequently analyzed by [$^3H$] phorbol ester binding assay or immunoblotted against PKC-${\alpha}$ and -${\varepsilon}$ monoclonal antibodies. While non-dioxin-like-PCB (PCB-52 and PCB-4) induced a translocation of PKC-${\alpha}$ and -${\varepsilon}$ from cytosol to membrane fraction, dioxin-like PCBs (PCB-126, -169, -114, -157) had no effects. [$^3H$] Phorbol ester binding assay also revealed structure-dependent increase similar to translocation of PKC isozymes. While PCB-4 induced translocation of PKC-${\alpha}$ and -${\varepsilon}$ was inhibited by ROS inhibitor, the pattern of translocation was not affected in presence of AhR inhibitor. It is suggested that PCB-4-induced PKC activity may not be mediated via AhR-dependent pathway. Taken together, our findings suggest that chlorination of ortho-position in PCB may be a critical structural moiety associated with neurotoxic effects, which may be preferentially mediated via non-AhR-dependent pathway. Therefore, the present study may contribute to understanding the neurotoxic mechanism of PCBs as well as providing a basis for establishing a better neurotoxic assessment.

PCBs Hazard After a Transformer Caught Fire

  • 조정현
    • 한국환경보건학회지
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    • 제9권1호
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    • pp.85-88
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    • 1983
  • 캄덴 카운티 청사에 있는 transformer에 화재가 난 후 건물내에 있는 60명의 혈야에서 PCB를 측정하였다. 화재가 발생한 건물내의 공기에서는 거의 검출되지 않았으나 transformer가 있는 방의 Swab Sample에서는 $52.6 \mug/cm^2$가 검출되었다. 건물을 재사용하기 전에 환기를 최대로 시킨후 다시 Swab Sample을 취했을때 12 Sample중 10주에서 PCB가 검출되지 않았다. 또한 혈야에서 PCB수준은 미검출에서 16ppb였으나 일반인에서도 69.2ppb까지 검출된것과 그밖에 17.6ppb까지 검출된 것으로 보아 화재후 PCB가 혈야중에서 증가했다는 증거는 없다고 본다. 이와 같이 혈청내에서 PCB가 증가하지 않은것은 화재후 즉시 청소와 환기를 실시한 결과로 본다.

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Dual Column-HRGC/ECD를 이용한 식품 중 PCBs 오염 실태조사 (Analysis of PCBs in Food by Dual Column-HRGC/ECD)

  • 서정혁;김정미;홍무기;김창민;최동미
    • 분석과학
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    • 제16권2호
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    • pp.166-173
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    • 2003
  • HRGC/ECD를 이용한 congener specific analysis 방법으로 국내 유통식품 중 PCBs의 오염실태를 조사하였다. Indicator PCB인 IUPAC #28, #52, #101, #118, #138, #153 및 #180 7종을 대상물질로 하였으며, 소고기, 돼지고기, 닭고기, 계란, 고등어, 조기, 멸치, 오징어, 바지락을 대상시료로 선정하여 서울, 부산, 광주 3개 지역에서 수집하였다. 채취한 시료는 균질화하여 알칼리 분해후 유기용매로 추출하여 지방을 분해하고 실리카겔 컬럼으로 정제하여 dual column-HRGC/ECD로 분석하였으며 검출된 시료에 대해서는 HRGC/MSD로 재확인하였다. 분석결과 고등어 등 어류 시료에서 미량수준 (0.0002~0.001 mg/kg)의 PCBs가 검출되었으며 주요 검출물질은 PCB #101과 PCB #118이었다.

A Path Planning of Dispenser Machines in PCB Assembly System Using Genetic Algorithm

  • Woo, Min-Jung;Lee, Soo-Gil;Park, Tae-Hyoung
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 2001년도 ICCAS
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    • pp.52.2-52
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    • 2001
  • We propose a new optimization method to improve the productivity of dispenser machines in PCB assembly lines. The optimization problem for multi-nozzle dispensers is formulated as a variant TSP. A genetic algorithm is applied to the problem to get a near-optimal solution. Chromosome and some operator are newly defined to implement the genetic algorithm for multi-nozzle dispensers. Simulation results are then presented to verify the usefulness of the method.

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유방암 환자와 정상여성의 혈액 및 지방조직 중 PCBs 형태에 관한 연구 (The Pattern of PCBs Level in Adipose Tissue and Serum of Breast Cancer and Normal Women)

  • 노영만;이강숙;구정완;장경순
    • 한국환경보건학회지
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    • 제29권2호
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    • pp.29-37
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    • 2003
  • The purpose of this study was to identify the distribution of non-ortho and mono-ortho PCB congeners and homologues in adipose tissues and sera of women with breast cancer. The collected samples were 25 adipose tissues and 33 sera from women with breast cancer. The samples from the control group were 49 adipose tissues and 52 sera. The levels of three non-ortho and eight mono-ortho PCBs identified in adipose tissue and serum samples were determined by GC/MSD and GC/ECD analyses. Non-ortho and mono-ortho PCB congeners were more dominant in the control group than in the case group for serum samples. The Tetra-PCB and the Hexa-, Hepta-PCB were more dominant in tale and control groups, respectively. The level of PCB homologues in normal women was similar to that of the normal human milk samples. However, the levels of PCB homologues from breast cancer patients were almost same the level of sample from environment. As a result of this study, it is suggested that breast cancer could be related to environmental factors such as PCB level in stack gas and soil sample. More extended research should be to verify this result.

국내 사업장 폐기물 중 유기오염물질의 배출특성 연구 - 금속과 플라스틱 제조공정 및 폐수처리시설 중심으로 - (Characteristics of organic pollutants in discharged industrial waste in Korea - Focuse on metallic and plastic manufacturing processes and wastewater treatment plants -)

  • 연진모;강영렬;김우일;신선경;정성경;조윤아;김나;김민선
    • 분석과학
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    • 제25권6호
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    • pp.421-428
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    • 2012
  • 본 연구는 국내에서 배출되는 금속과 플라스틱 및 폐수처리시설 폐기물 중 유기오염물질류인 PCDD/PCDFs, PAHs, PCBs의 배출 특성을 파악하고자 수행하였다. PCDD/PCDFs의 농도는 비산재가 7.37~432.20 ng-TEQ/kg, 소각재는 0.51~855.01 ng-TEQ/kg, 분진의 0.37~385.81 ng-TEQ/kg 범위로 나타났으며 외국의 분석결과에 비해 다이옥신의 함량농도가 낮은 것으로 조사되었다. PAHs의 농도는 공정오니의 평균 함량농도가 0.0075~2.9225 mg/kg, 폐수처리오니는 0.0035~1.6716 mg/kg 범위로 나타나 해양환경관리법의 규제기준을 모두 만족하였으며, 공정오니 및 폐수슬러지의 PAHs 농도는 외국의 경우와 비교하여 다소 낮은 것으로 조사되었다. 또한, 해양환경보전법에서 관리하고 있는 PCBs 7 종을 분석한 결과(제 1기준 0.15 mg/kg 비교) 검출농도는 0.0~0.65 mg/kg으로 나타났으며, 일부 기계유 및 작동유에서 PCB-52, PCB-101, PCB-138, PCB-153 및 PCB-180 개별이성체가 초과되었다.