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Some Isoflavones from the Root of Caragana microphylla Lam (골담초의 이소후라본 성분)

  • Jin, Guang-Zhu;Li, Jing-Dao;Ahn, Byung-Zun
    • YAKHAK HOEJI
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    • v.36 no.5
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    • pp.481-485
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    • 1992

  • Five isoflavones were isolated from the root of Caragana microphylla Lam. and the structures have been identified by means of chemical and physical methods. The isoflavones are 7-hydroxy-4'-methoxyisoflavone(formononetin), $form ononetin-7-O-{\beta}-glucoside(ononin)$, 7-hydroxy-3', 4'-methylenedioxyisoflavone(pseudobaptigenin), $7-O-{\beta}-glucuopyranosyloxy-3'- hydroxy-4'-methoxyisoflavone(calycosin-7-O-{\beta}-gluc-oside)$ and maackiain.

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REMARKS ON FIXED POINT THEOREMS

  • Jiang, Guo-Jing;Kang, Shin-Min
    • East Asian mathematical journal
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    • v.16 no.2
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    • pp.175-181
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    • 2000

  • In this paper we show fixed point theorems related with the diameter of orbit on metric spaces. The results presented in this paper extend, improve and unify the results of $Heged\"{u}s$ [1], Kim, Kim, Leem and Ume [2], Kim and Leem [3], Ohta and Nikaido [4] and $Taskovi\'{c}$ [5].

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(Part 2) 2-Chloro-1-Propanol ((第2報) 2-Chloro-1-Propanol 에 關하여)

  • Kim, Ho-Jing;Kim, Shoon-Kyung
    • Journal of the Korean Chemical Society
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    • v.5 no.1
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    • pp.52-55
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    • 1961

  • Assuming an intramolecular hydrogen-bonding, computation has been made on the optical rotatory power of 2-Chloro-1-Propanol. The magnitude of the calculated rotation is in fair agreement with the measured value of Lucas (calculated value: 21.6. measured value: 17.39). The agreement supports the validity of the assumption concerning the hydrogen-bonding between O atom and Cl atom. The agreement in sign confirms the validity the Fischer projection formula given by Lucas.

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