• 제목/요약/키워드: TBT

검색결과 290건 처리시간 0.032초

유기주석 노출에 의한 Mysid, Neomysis awatschensis의 독성 영향 (The Toxic Effects of Mysid, Neomysis awatschensis Exposed to Organotin)

  • 지정훈;김상규;황운기;강주찬
    • Environmental Analysis Health and Toxicology
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    • 제17권4호
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    • pp.357-362
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    • 2002
  • Tests for the toxicity of tributyltin (TBT) were conducted on mysid collected from Dadepo beach, Pusan, Korea. The toxic effects of tributyltin on the survival, growth and oxygen consumption of the mysid, Neomysis awatschensis have been evaluated. Mysids were exposed to several concentrations of TBT (0, 0.56, 1.15, 3.07 and 6.12 $\mu\textrm{g}$/L) for 6 weeks. Survival rate was decreased with increases in concentration and exposure time and the reduction of more than 40% occurred at TBT concentration greater than 1.15 $\mu\textrm{g}$/L after 6 weeks. Growth rate was significantly decreased at concentrations greater than 1.15 $\mu\textrm{g}$/L. Oxygen consumption rate was also decreased in a concentration-dependent way and significantly decreased to 39,47 and 69% of the control at 1.15, 3.07 and 6.12 $\mu\textrm{g}$/L, respectively. These results indicate that the contamination of aquatic environment by TBT has the potential to significantly reduce coastal and estuaries recruitment of mysids.

WTO/TBT 협정에 준한 전기설비의 IEC 60364와 NFPA70(NEC)의 비교적용에 관한 연구 (Research on the Comparison and Application of IEC60364 & NFPA70(NEC) according to WTO/TBT agreement)

  • 정용기;곽희로;남택주
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2001년도 춘계학술대회 논문집 전력기술부문
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    • pp.140-143
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    • 2001
  • As global trade system transferred GATT into WTO, the harmonization of technological standards, certification, construction, testing is the trend of world. This drift is based on WTO / TBT agreement coming. In effect after 12th, April, 1979. For Korea, the distribution system has a strong resemblance to American system so that engineers are confused in adopting standards. IEC60364 and NEC are in part similar but unconvertible because IEC 60364 originated from Europe while NEC originated from USA. This thesis deals with the fundamental elements of electrical safety system with comparing IEC 60364 with NEC. It serves as a guide how to apply standards when engineers select electrical installations.

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Reponses of the Hepatic Microsomal Cytochrome P450 Monooxygenase System in Rock Bream Oplegnathus fasciatus Exposed to Tributyltin (TBT)

  • Hwang, Un-Gi;Lee, Jung-Sik;Kang, Ju-Chan
    • Fisheries and Aquatic Sciences
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    • 제16권4호
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    • pp.261-265
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    • 2013
  • The study was conducted to investigate the responses of the hepatic microsomal cytochrome P450 monooxygenase system in the rock bream Oplegnathus fasciatus after chronic exposure to 0, 1, 2, 4, and $8{\mu}g/L$ tributyltin (TBT) concentrations for 4 weeks. Hepatic cytochrome 450 content and ethoxyresorufin O-deethylation (EROD) activity were found to significantly increase in fish treated with the higher concentration of TBT (${\geq}4{\mu}g/L$); however, no significant changes were observed in penthoxyresorufin O-deethylation (PROD) activity in all treated groups compared to the control group. These findings suggest that exposure to a low TBT concentration (${\geq}4{\mu}g/L$) has the potential to induce cytochrome 450 content and EROD enzyme activity in hepatic tissue in the rock bream.

Butyltin Compounds Concentrations in Masan Bay

  • CHOI Hee Gu;KIM Pyoung Joong;LEE Won Chan
    • 한국수산과학회지
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    • 제30권6호
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    • pp.923-928
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    • 1997
  • The occurrence of butyltin compounds in the seawater and sediment of Masan Bay was investigated. The concentrations were in the range of $ND-0.059{\mu}g/\ell$ for tributyltin (TBT), $ND-0.091{\mu}g/\ell$ for dibutyltin (DBT) and $ND-0.720{\mu}g/\ell$ for monobutyltin (MBT) in the seawater, and $ND-0.233{\mu}g\;TBT/g.dry$, $ND-0.197{\mu}g-DBT/g.dry$ and $ND-0.684{\mu}g-MBT/g.dry$ in the sediment. Among the butyltin compounds, the major component in the seawater was MBT, while the predominant species in the sediment changed with time. The tributyltin concentrations in the sediment are approximately three orders of magnitude greater than the associated water column levels. Sediment/water partition coefficients (K) of TBT were between $0.6\times10^3\;and\;5.0\times10^3$.

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WTO/TBT협정하에서 알코올 라벨링에 대한 국제적 조화 가능성에 관한 연구 (A study for the possibility of international harmonization on alcohol labelling under WTO/TBT)

  • 양정미
    • 무역학회지
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    • 제44권2호
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    • pp.37-49
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    • 2019
  • This paper determines if mandated alcohol health information labelling could be an obstacle to international trade by discussing international trade rules affecting member nations. WTO members could use alcohol labelling rules to protect human health, reduce the consumption of alcohol and provide product information. When a member uses alcohol labelling as a technical regulation or standard, it should comply with TBT Articles 2.2 and 2.4. If a member uses some specific warning messages for their objectives, it should be considered the contribution of the measure, trade restrictiveness, and alternatives. If WTO members want to employ their own alcohol labelling schemes for addressing carcinogenicity, intoxicating effects, dependence potential, effects on children, adolescents and pregnancy, it could be a technical barrier and also create adverse effects on international trade. Therefore, the harms of alcohol are supported by scientific evidence, and for this reason, the international harmonization for alcohol labelling should be discussed openly to prevent negative effects on trade.

만성 슬개대퇴통증 환자에 턱관절균형요법을 병용하여 증상 개선을 보인 치험 1례 (Case Report of a Patient Who Experienced Symptomatic Improvement Using Combined TMJ Balancing Therapy to Chronic Patellofemoral Pain)

  • 최가원
    • 턱관절균형의학회지
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    • 제13권1호
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    • pp.27-31
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    • 2023
  • The purpose of this case report is to introduce a case of immediate results with TMJ balancing therapy (TBT) in the treatment of chronic patellofemoral pain (PFP). A 17-year-old female patient with 4-month-old chronic knee pain that was unresponsive to conventional treatment was treated with TBT for a total of 5 sessions. The primary outcomes were evaluated using the Numeric Rating Scale (NRS) and the Korean version of the Western Ontario and McMaster Universities Osteoarthritis Index (KWOMAC). Following the first treatment, the NRS decreased rapidly, and the KWOMAC improved after a total of five treatments. These findings suggest that TBT can be an effective pain management option for chronic PFP patients with temporomandibular joint malposition. However, as this study is a report of a single case, further research is necessary.

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한중 FTA체결에 따른 정부의 MRA 활용 방안에 관한 연구 -TBT 및 적합성평가를 중심으로- (A Study on the utilization plan of Mutual Recognition Agreement for Korea-China FTA: Focused on TBT and Conformity Assessment)

  • 전병호;강병구
    • 통상정보연구
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    • 제17권3호
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    • pp.177-201
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    • 2015
  • 한국은 경제성장에 있어 무역 의존도가 매우 높은 나라로, 특히 중국에 대한 의존도가 높다. 비관세 장벽 중 무역상 기술 장벽(TBT)의 중요도가 크게 증가하고 있는데, 한국과 중국 양국간 교역에서 기술장벽이 미치는 영향이 크기 때문에 무역상 기술장벽의 제거는 FTA 체결에 있어서 한국 정부가 관심을 가지고 있는 쟁점 사항 중 하나이다. 상호인정협정(MRA)이 그러한 기술 장벽을 해소할 수 있는 효과적인 수단으로 주목받고 있는데, 기존의 연구들은 MRA가 수입 장벽을 완화시켜 주고 국제 시장에서 많은 기업들이 직면하고 있는 문제점들을 해결해 줄 수 있을 것이라 밝히고 있다. 이에 본 연구에서는 2015년 가서명된 한중 FTA 체결에 있어서 MRA의 활용 방안을 모색해 보고자 하였는데, 교역량과 양국간 규제의 차이를 고려한 적합한 MRA 활용 방안을 제시하였다. MRA 관련한 기존의 연구들은 MRA의 필요성과 그 효과에 대한 분석에 그치고 있는데 반해, 본 연구는 한국과의 교역량이 큰 중국이라는 특정 국가를 대상으로 구체적인 MRA 활용 방안을 모색하였다는데 그 의의가 있다.

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