• 제목/요약/키워드: fractionation.

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Spasmolytic Principle of Asarum sieboldii

  • Lee, Eun-Bang;Hong, Sa-Min;Woo, Won-Sick
    • 생약학회지
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    • 제15권4호
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    • pp.173-175
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    • 1984
  • Fractionation of methanolic extract of Asarum sieboldii monitoring by bioassay resulted in the isolation of methyleugenol as a spasmolytic principle. Its $pD'_2$ value was 4.3.

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고려홍삼의 수용성 갈변물질 (Water Soluble Browning Pigments of Korean Red Ginseng(Panax ginseng C. A. Meyer))

  • 이성계;이종원
    • Journal of Ginseng Research
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    • 제19권3호
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    • pp.244-248
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    • 1995
  • Water-soluble browning pigments were artily purified from Korean red ginseng through the several procedures such as fractionation by n-butanol, precipitation by ethanol, dialysis and gel filtration. At least four kinds of water-soluble browning pigment were separated from each other, two kinds of low-molecular-weight and two kinds of high-molecular-weight pigments.

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전기동력학적 정화기술 적용을 위한 최적의 전해질 선택 및 전극간의 거리 평가 (Evaluation of Electrolyte and Electrode Spacing for Application of Electrokinetic Remediation)

  • 박근용;김우승;김도형;양중석;백기태
    • 한국지하수토양환경학회지:지하수토양환경
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    • 제18권1호
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    • pp.6-15
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    • 2013
  • The influence of processing fluids and electrode spacing on the electrokinetic process was evaluated to remediate As-, Cu-, Pb-contaminated soil. Single and mixture of sodium citrate, EDTA and NaOH was used to investigate the metal extraction. EDTA for washing reagent showed the highest removal efficiency. Based on the extraction result, the electrode spacing (20, 40, 60 cm) on the electrokinetic process was investigated to remove the multi-metals from soil. The highest removal was observed at the experiment with 60 cm of electrode spacing, however, the correlation between electrode spacing and removal of metals was not clear. The electrode spacing influenced the amount of accumulated electro-osmotic flow. BCR sequential extraction showed that electrokinetic process removed the fractionation of metals bound to Fe-Mn oxyhydroxide.