• 제목/요약/키워드: biphenyls

검색결과 242건 처리시간 0.026초

Polychlorinated biphenyls 중독 해독제의 개발에 관한 연구 (Studies on the Development of Detoxicating Agents of Polychlorinated biphenyls Toxicity)

  • 정기화;장판섭
    • 한국식품위생안전성학회지
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    • 제2권2호
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    • pp.51-56
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    • 1987
  • PCBs 투여로 중독된 rat에 대한 천문동, 황정, 백복령, 인삼, 오가피 등의 ethanol 추출물의 효과는 다음과 같다. 1. 생약추출물의 병용투여로 PCBs 중독으로 감소된 체중이 증가하였으나 간장중량의 현저한 회복효과는 볼 수 없었다. 2. 생약추출물을 병용투여함으로써 PCBs 중독으로 감소된 RBC, WBC, Hgb 및 Het의 값이 상승하였으며 특히 백복령과 인삼 추출물의 경우 회복효과가 컸다. 3. PCBs로 증가된 혈청중 cholesterol치와 total lipids가 생약추출물을 투여함으로써 감소되었다. 4. PCBs 투여로 증가된 혈청중 GOT, GPT 및 ALP의 활성도 생약추출물의 투여로 정상치에 가깝게 감소되었다.

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초임계수 내에서 PCBs 완전산화반응의 전산모사에 관한 연구 (A Study on the Computer Simulation for the Complete Combustion Reaction of PCBs in Supercritical Water)

  • 조정호;김경숙;손순환;김영철
    • Korean Chemical Engineering Research
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    • 제45권1호
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    • pp.46-51
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    • 2007
  • 본 연구에서는 전력 산업에서 발생하는 폐기물 중의 하나인 Poly Chlorinated Biphenyls(PCBs)를 함유한 절연유를 초임계수 내에서 완전산화반응을 통해서 제거하는 전산모사를 수행하였다. 절연유의 주성분을 노말 데칸으로 선정하였으며, 초임계수 내의 절연유의 함량은 3.0 wt%로 가정하였다. 초임계수 내에서의 물성 추산을 위해서 Peng-Robinson 상태방정식을 사용하였으며, 전산모사를 통해서 초임계수 내에서 3.0 wt%의 절연유 및 과잉 산소가 모두 용해되는 현상을 잘 설명할 수 있었다.

Application of Equilibrium Partitioning Approach for the Assessment of Polychlorinated Biphenyls (PCBs) Contamination in Sediments from Kyeonggi Bay, Namyang Bay, and Lake Shihwa, West Coast of Korea

  • Lee, Kyu-Tae;Tanabe, Shinsuke;Koh, Chul-Hwan
    • Journal of the korean society of oceanography
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    • 제34권1호
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    • pp.36-42
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    • 1999
  • To assess present status of polychlorinated biphenyls (PCBs) contamination in Kyeonggi Bay, Namyang Bay, and Lake Shihwa, 63 sediment samples were analyzed and applied to equilibrium partitioning approach. Sediment quality criteria (SQC) for exposure to Kanechlor mixture (KC-mix) was calculated as a value of 16 ${\mu}$g/g-organic carbon (OC). Two sites (Sites Kl8 and Kl9) within Incheon North Harbor (INH) with total PCBs concentrations 48 and 38 ${\mu}$g/g-OC, respectively, exceeded SQC, indicating a potential of adverse biological effects. The advantage and disadvantage of equilibrium partitioning approach has been discussed.

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혈중 PCB 함량에 관한 조사 (A Study on the Polychlorinated Biphenyls in Human Blood)

  • 김돈균;정갑열;이수일;황인철
    • 한국대기환경학회지
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    • 제1권1호
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    • pp.9-15
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    • 1985
  • For the purpose of obtaining the index that represents the contaminated status due to polychlorinated biphenyls (PCB) in the human body, the authors investigated the contents of PCB in the plasma of 183 subjects who were not exposured to the massive amount of PCB occupationaly in the past. The obtained results were as follows; 1. The mean contents of PCB in plasma were 3.35 $\pm$ 1.48 ppb in male and 3.04 $\pm$ 1.06 ppb in female. $Cl_4$ and $Cl_3$ were the main isomers in both sexes. 2. The distribution of total-PCB by the age group was showed increasing tendency with the age in both sexes. 3. The tendency of freqyency distribution of total-PCB level were skewed to the higher level in malo and skewed to the lower level in female. 4. There was satistically significant interrelationship between age and total-PCB in plasma in both sexes.

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대기 중 유기염소계 살충제(OCPs)와 PCBs의 높이별 농도 변화 (Variation of Atmospheric Concentrations of Organochlorine Pesticides (OCPs) and Polychlorinated Biphenyls (PCBs) at Different Height)

  • 천만영;최민규;여현구
    • Environmental Analysis Health and Toxicology
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    • 제23권3호
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    • pp.201-211
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    • 2008
  • This study was performed to find the atmospheric concentrations of organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs) at four different heights (l0, 50, 150 and 1,500 cm) using low volume polyurethane foam (PUF) plug air sampler in semi-rural area. ${\alpha}-/{\beta}-/{\gamma}-HCH$ with low molecular weights and Koa (octanol-air partitioning coefficient) in OCPs were similarly high concentrations at all heights, but the other OCPs (p,p'-DDE, p,p'-DDD, p,p'-DDT, Heptachlor epoxide, ${\gamma}$-CHL, ${\alpha}$-CHL, Trans-nonachlor) with high molecular weights and Koa decreased with increasing heights. However, the concentrations of PCBs increased with increasing height.