• 제목/요약/키워드: Carbon Tetrachloride

검색결과 540건 처리시간 0.045초

Removal of TCE using zero valent iron (ZVI) with other contaminants

  • 조현희;박재우
    • 한국지하수토양환경학회:학술대회논문집
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    • 한국지하수토양환경학회 2002년도 총회 및 춘계학술발표회
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    • pp.58-61
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    • 2002
  • An alternative to pump and treat groundwater remediation is the use of reactive barriers. Zero valent iron (ZVI) is particularly useful as a reductant of chlorinated hydrocarbons because of its low cost and lack of toxicity ZVI can drive the dechlorination of chlorinated organic compounds and the reduction of chromium from the Cr(Ⅵ) to the Cr(III) state. The contaminants in subsurface environment usually exist as the mixed compounds. Therefore, the objective of this research is to study the effect of the other compounds on TCE removal by ZVI. The removal mechanism of TCE by ZVI is separated the dechlorination and sorption. TCE removal by ZVI slightly increased in presence of naphthalene as the non-reduced compound. TCE removal by ZVI remarkable decreased in presence of carbon tetrachloride, nitrate, and chromate as the reduced compounds. This research suggests that the effect of the coexisted compounds on the removal chlorinated compounds by reactive barrier technology should be considered for practical application.

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상황(Phellunus Linteus), 차가(Inonotus Obliquus), 황금(Scutellaria Baicalensis Georgi) 추출물이 사염화탄소로 유발된 흰쥐에서의 간 보호 효과 (Hepatoprotective Effect of Phellunus Linteus, Inonotus Obliquus and Scutellaria Baicalensis Georgi Extracts in Rats Induced Carbon Tetrachloride)

  • 안치선;정용준;최세영;김해란;전윤희;전상현;임병우
    • 한국약용작물학회:학술대회논문집
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    • 한국약용작물학회 2008년도 추계학술발표회
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    • pp.131-132
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    • 2008
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The Effect of Carthamus tinctorius L, Semen on Carbon Tetrachloride-Induced Hepatotoxicity in Rats

  • Chung, Chun-Sik;Kang, Hye-Kyung;Han, Hye-Kyoung;Jung, Ki-Hwa
    • 한국응용약물학회:학술대회논문집
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    • 한국응용약물학회 1996년도 춘계학술대회
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    • pp.201-201
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    • 1996
  • 천연물 성분의 약효와 간독성에 관여하는 기전연구의 일환으로 사염화탄소로 유발된 흰쥐에서 혈청 중의 효소 활성도, 지질함량 및 과산화지질을 측정하여 홍화자 추출물과 분획물이 사염화탄소로 유발되는 간독성에 미치는 효과를 규명하고자 하였다. 홍화자는 홍화(Carthamus tinctorius L.)의 씨로서 성미는 신, 온하며 활혈거제 및 소 지통의 효능을 가진 구어혈제로서 자궁에 대한 흥분작용과 관상동맥을 확장시키는 작용이 있으며 혈압을 하강시키는 작용이 있다. 또한 고cholesterol 혈증을 낮추고 혈전폐색성 맥간염을 치료하는 효과도 있다고 한다.

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Measurement and Prediction of the Flash Points for Flammable Liquid Mixtures with Non-flammable Component

  • Ha, Dong-Myeong;Yu, Hyun-Sik;Kang, Gyeun-Hee;Ann, Jeong-Jin;Lee, Sung-Jin
    • International Journal of Safety
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    • 제7권2호
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    • pp.12-16
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    • 2008
  • Lower flash points for the binary systems, carbon tetrachloride+o-xylene and water+n-butanol were measured by Pensky-Martens closed cup tester. The Raoult's law and optimization method using van Laar equation were used to predict the lower flash points and were compared with experimental data. The calculated values based on the optimization method were found to be better than those based on the Raoult's law.

천련자(川煉子) 성분(成分)이 간기능(肝機能)에 미치는 영향(影響)에 관한 연구(硏究) III. -Melianone과 28-deacetyl sendanin의 약물 대사효소계 및 담즙분비에 미치는 영향- (The Effects of Meliae toosendan Fructus on Liver Function. III. -Effects of Melianone and 28-Deacetyl Sendanin on Drug Metabolism and Bile Juice Secretion-)

  • 김부생;김혜경;최종원;이정규
    • 생약학회지
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    • 제27권1호
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    • pp.47-52
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    • 1996
  • A triterpenoid(melianone) and a limonoid(28-deacetyl sendanin) were isolated from the chloroform fraction of Meliae toosendan Fructus, the rippen fruits of Melia toosendan SIEB. et ZUCC.(Meliaceae) and were applied to serial experiments to clarify the liver protective activities. We found that the compounds promoted slightly the drug metabolizing enzyme activities and decreased serum transaminase activities which was elevated by carbon tetrachloride intoxication. And also they slightly increased the secretion of bile juice in rat.

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Evaluation of Hepatoprotective Potential of Cassia tora Leaf Extract

  • Maity, Tapan Kumar;Mandal, Subhash C.;Mukherjee, Pulok K.;Saha, Kakali;Das, J.;Saha, B.P.;Pal, M.
    • Natural Product Sciences
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    • 제3권2호
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    • pp.122-126
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    • 1997
  • Methanolic extract of the leaves of Cassia tom was evaluated for its hepatoprotective potentials in rats by inducing hepatotoxicity with carbon tetrachloride. The extract at a dose of 400 mg/kg orally showed significant protective effect by lowering the serum levels of transaminase (SGOT and SGPT), bilirubin and alkaline phosphatase (ALP). The effects produced were comparable to that of a standard hepatoprotective agent.

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Electron Donor 및 Electron Acceptor의 농도가 생물활성대형성 및 유해폐기물 처리에 미치는 영향 (Effects of Electron Acceptor and Electron Donor on Biodegradation of $CCl_4$by Biofilms)

  • Bae, Woo-Keun;Bruce E. Rittmann
    • Environmental Analysis Health and Toxicology
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    • 제6권3_4호
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    • pp.149-154
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    • 1991
  • Biodegradation of carbon tetrachloride (CTC) in denitrifying and aerobic columns was investigated under various conditions of electron-acceptor and electron-donor availability. CTC removal increased when the electron-acceptor (nitrate) injection was stopped in the denitrifying column; however, CTC remova1 decreased when electron donor (acetate) was deleted in the denitrifying and the aerobic column. Small fractions of the CTC removed appeared as chloroform, indicating that reductive dechlorination of CTC was occurring. The results from the denitrifying column support the hypothesis that CTC behaves as an electron acceptor that competes for the pool of available electrons inside the bacterial cells.

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Fluorene 발색단의 PL특성 (Photoluminescence of donor-acceptor fluorene chromophore)

  • 서병준;이태훈;손세모;정수태;김강언
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2002년도 하계학술대회 논문집 Vol.3 No.2
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    • pp.1013-1015
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    • 2002
  • 1-(9,9-Di-octyl-fluorenyl)-2-substituted-2-cyanvinylene was synthesized and emission feature in solution are presented. Photoluminescence characteristics of 1-(9,9-Di-octyl-fluorenyJ)-2-substituted-2-cyanvinylene are measured by solvents such as carbon tetrachloride, normal hexane, chloroform, ethylaccetate, acetonitrile, methanol. It is shown that depending in the strength of the donor-acceptor internal charge transfer, and emission spectra are more or less red-shifted.

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In vivo metabolism of 2-methylaminoethyl-4,4′-dimethoxy-5,6,5′,6′-dimethylenedioxybiphenyl-2′-carboxy-2-carboxylate (DDB-S) in rats using deutrium labeled compound

  • Lee, Eun-Young;Shin, Myoung-Youp;Lee, Mi-Jin;Jung, Ha-Youn;Son, Jung-Hyun;Kim, Dong-Hyun
    • 대한약학회:학술대회논문집
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    • 대한약학회 2003년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.1
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    • pp.133.2-134
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    • 2003
  • 2-Methylaminoethyl-4, 4'-dimethoxy-5, 5', 6.6 -dimethylenedioxybiphenyl-2'-carboxy-2-carboxylate (DDB-S), a synthetic compound derived from DDB, has been known to protect liver against carbon tetrachloride-, D-galactosamine-, thioacetamide-, and prednisolone-induced hepatic injury in experimental animals. The metabolism of this compound has been assessed in rats by using liquid chromatography/electrospray tandem mass spectrometry (LC/MS/MS) method. (omitted)

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Effects of Platycodi Radix on Hepatic Fibrosis in Rats

  • Lee, Kyung-Jin;Kim, Young-Sup;Ryu, Si-Yung;Chung, Young-Chul;Choi, Chul-Yung;Cho, Young-Soo;Jeong, Hye-Gwang
    • 대한약학회:학술대회논문집
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    • 대한약학회 2003년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.1
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    • pp.175.2-176
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    • 2003
  • Herbal medicines are increasingly being utilized to treat a wide variety of disease processes. We previously reported that aqueous extract from the roots of Platycodon grandiflorum A. DC (Campanulaceae), Changkil (CK), had hepatoprotective effects against acetaminophen induced liver injury. In the present study, we assayed the preventive and therapeutic effects of CK on experimental hepatic fibrosis induced by dimethylnitrogamine or carbon tetrachloride in rats. (omitted)

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