• 제목/요약/키워드: Bromine

검색결과 116건 처리시간 0.029초

汚濁河川水의 地球化學的인 硏究(第 III 報) 서울市內 河川水의 브롬舍量 (Geochemical Investigation in Contaminated River Waters(Part III) Bromine Contents of River Water in Seoul)

  • 이용근
    • 대한화학회지
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    • 제14권3호
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    • pp.243-256
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    • 1970
  • Halogen contents of the river water of Seoul city and of municipal reservoirs were investigated from June in 1969 to February in 1970. Bromine contents were ranging from 0.006 to 0.048 mg/1 of the reservoirs, 0.021 to 0.048 mg/1 of Han River, 0.051 to 0.540 mg/1 of rivers running through residential areas and 0.083 to 0.920 mg/1 of rivers running through industrial areas. Bromine contents increased as the river water became contaminated. Most of Br/Cl of Han River and the reservoirs were higher than $3.4{\times}10^{-3}$ of sea water. Bromine contents at 17 different places were the largest in November. The contents of chlorine, iodine and COD (chemical oxygen demand) were nearly correlated with that of bromine. Bromine contents of the river waters in Seoul chiefly originated from consumption of domestic and industrial salt.

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식품중 미량원소의 함량에 관한 연구 (Studies on the Contents of the Trace Elements in Vegetables.)

  • Lee, S.K.;Youn, J.E.;Lee, S.H.;Hur, Y.H.;Lee, B.O.
    • 한국환경보건학회지
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    • 제3권1호
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    • pp.13-16
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    • 1976
  • Authors investigated the analyse trace elements in vegetables and Ginseng which indicated as follows: 1. Garlic, ginger, and onion has considerably large amounts of magnesium, garlic has in proper sequence as copper, aluminum, magnesium, bromine and mercury. Ginseng has in proper sequence as aluminum, magnesium, copper, bromine and mercury, and onion has in proper sequence as copper, manganese, aluminum, bromine and mercury. 2. Carrot has considerably large amounts of magnesium and has in proper sequence as copper, magnesium, aluminum, bromine and mercury. 3. Ginseng also has large amounts of magnesium and has in proper sequence as magnesium, aluminum, copper, bromine, and mercury.

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Zinc-Bromine 플로우 배터리용 ESS의 BMS 설계 및 운용 (A Design and Operation of Battery Management System for Energy Storage System with Zinc-Bromine Flow Battery)

  • 임종웅;장현석;조영훈;최규하
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2015년도 전력전자학술대회 논문집
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    • pp.293-294
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    • 2015
  • This paper proposed a design and operation of energy storage system using Zinc-Bromine flow battery. To operate flow battery system with BMS, it uses motor drive system to pump electrolyte. it also needs sensors to check leaking and temperature. The proposed system proves the validity by experiment.

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Kinetic Study on Bromine-Exchange Reaction of Antimony Tribromide with $\alpha$-Phenylethyl Bromide in Nitrobenzene

  • Choi, Sang-Up;Pae, Young-Il;Rhyu, Sok-Hwan
    • Bulletin of the Korean Chemical Society
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    • 제6권3호
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    • pp.124-127
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    • 1985
  • The kinetic study on the bromine-exchange reaction of antimony tribromide with ${\alpha}$-phenylethyl bromide in nitrobenzene has been carried out, using Br-82 labelled antimony tribromide. The results show that the exchange reaction is first order with respect to ${\alpha}$-phenylethyl bromide, and either second or first order with respect to antimony tribromide depending on its concentration. It is also concluded that ${\alpha}$-phenylethyl bromide exchanges bromine atom with antimony tribromide much faster than other organic bromides previously examined. Reaction mechanisms for the exchange reaction are discussed.

CHN-corder의 응용과 연소 flask에 의한 미량 유기 Cl, Br, S의 분리정량 (원소-분석을 식품 혼합물 정량에 응용) (Mirco-method for Analysis of Chloride, Bromine and Sulfur in Organic Compounds by Application of CHN Corder and Combustion Flask)

  • 박만기
    • 약학회지
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    • 제13권2_3호
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    • pp.57-61
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    • 1969
  • From the principle of CHN-Corder analysis, it is obvious that seperation of chlorine and bromine in a sample is nearly impossible. In order to analyze, chlorine, bromine, and sulfur seperately in a sample which is a single organic compound or a mixture of organic drugs, combination of flask combustion method and CHN-Corder was successfully attempted.

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Chemistry of the 3a,7a-Dihydro-1H-indole Esters. Aromatization by Bromine$^\dag$

  • Lee, Chang-Kiu;Ahn, Yu-Mi;Han Lee, In-Sook
    • Bulletin of the Korean Chemical Society
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    • 제7권4호
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    • pp.311-314
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    • 1986
  • A series of tetramethyl 1-substituted benzyl-3a,7a-dihydro-1H-indole-2,3,3a,4-tetracarboxylates were prepared and their reactions with bromine were examined. The initial reaction seemed to be the formation of the intermediate N-bromo quaternary ammonium bromide. This intermediate underwent aromatization with loss of the 3a-methoxycarbonyl group. Bromine replaced the N-substituent of the p-methoxybenzyl compound and addition of bromine occurred across the $C_6-C_7$ double bond of the indole ring. Bromination of the benzyl ring and aromatization occurred for the m-methoxybenzyl compound.