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이승호,유시용,최상운,노재성,김성기,이정옥,안종웅 영남대학교 약품개발연구소 1995 영남대학교 약품개발연구소 연구업적집 Vol.5 No.-
EtOAc soluble part of MeOH extract of Anemarrbena asphodeloides rhizome was evaluated for the cytotoxicity against the five kinds of human tumor cell lines (A-549, SK-OV-3, SK-MEL-2, XF498 and HCT15) in vitro. Bioassay-guided fractionation of EtOAc soluble part led to the isolation of active compound which was identified as timosaponin A-Ⅲ1 showed potent cytotoxic activity, but its genin, sarsasapogenin, did not show cell growth inhibition.
Aging estimation of reactor pressure vessel in the field using magnetic properties
Baek, Un Bong,Ryu, Kwon Sang,Kim, Amkee,Nahm, Seung Hoon Elsevier 2009 Journal of loss prevention in the process industri Vol.22 No.6
<P><B>Abstract</B></P><P>Many researchers have been interested in the nondestructive measurement methods for estimating components damage in order to assure the safe service of steel structures. It is recognized that the evaluating techniques based on magnetic measurement can offer a great potential because of high susceptibility to the change of several metallurgical factors. Magnetic property such as coercive force was measured. The coercive force at room temperature monotonously increased with the increase of frequency. The correlation between the magnetic properties of used material and that of un-used material was studied. The coercive force gradient at room temperature increased with the increase of aging. Hence the estimating method using magnetic properties allows one to evaluate the extent of material aging for reactor pressure vessel.</P>
Antitumor activity of Trichosanthes kirilowii
Ryu, Shi Yong,Lee, Seung Ho,Choi, Sang Un,ee, Chung Ock,No, Zaesung,Ahn, Jong Woong 영남대학교 약품개발연구소 1995 영남대학교 약품개발연구소 연구업적집 Vol.5 No.-
The acitivity-directed fractionation upon the MeOH extract of the not of trichosanthes kirilowill led to the isolation of eight cucurbitane triterpenes namely cucurbitacin B(Ⅰ), isocucubitacin B(Ⅱ), cucurbitacin D (Ⅲ), isocucurbitacin D (Ⅳ, 3-epi-isocucurbitacin B(Ⅴ), dihydrocucurbitacin B(Ⅵ), dihydroisocucurbitacin B(Ⅶ) and dihydrocucurbitacin E(Ⅷ), as active principles. All isolates were shown to exhibit significant cytotoxicity against cultured human tumor cells, including A-549, SK-OV-3, 5K-MIL-2, XF-498 and HCT 15, with an exceptionally high potency.
Antitumor Triterpense from Medicinal Plants
Ryu, Shi-Yong,Choi, Sang-Un,Lee, Seung-Ho,Lee, Chong-Ock,No, Zaesung,Ahn, Jong-Woong The Pharmaceutical Society of Korea 1994 Archives of Pharmacal Research Vol.17 No.5
Thirteen kinds of naturally occurring or derivatised thiterpenes, reported to have an antitumoral property, were reinvestigated on the basis of their direct cytotoxicity or the inhibitory activity on cell growth against five kinds of cultured human tumor cells, i.e., A-549, SK-OV-3, SK-MEL-2, XF-498 and HCT15, in vitro. Ursonic acid III, betulinic acid VIII, betulonic acid X and glycrrhetinic acid XI were exhibitied a marked inhibition on cell growth.
Antitumor activity of Trichosanthes kirilowii
Ryu, Shi-Yong,Lee, Seung-Ho,Lee, Sang-Un,Lee, Chong-Ock,No, Zaesung,Ahn, Jong-Woong The Pharmaceutical Society of Korea 1994 Archives of Pharmacal Research Vol.17 No.5
The activity fractionation upon the MeOH extract of the root of trichosanthes kirilowii led to the isolation of eight cucurbitane tritepense namely cucurbitacin .betha. (I), isocucurbitacin .betha.(II), cucurbitacin D(III), isocucurbitacin D(IV), 3-epi-isocucurbitacin .betha(V), dihydrocucurbitain .betha. (VI), dihydroisocucurgbitachin .betha. (VII) and dihydrocucurbitacin E (VIII), as active principles. All isolates were shown to exhibit significant cytotoxicity against cultured human tumor cells, including A-549, Sk-OV-3, Sk-MEL-2, XF-498 and HCT 15, with an exceptionally high potency.
Antitumor Activity of some Phenolic Components in Plants
Ryu, Shi-Yong,Choi, Sang-Un,Lee, Chong-Ock,Lee, Seung-Ho,Ahn, Jong-Woong,Zee, Ok-Pyo The Pharmaceutical Society of Korea 1994 Archives of Pharmacal Research Vol.17 No.1
The activity-guided fractionation of some medicinal plants led to yield five kinds of natural stilbene compounds namely 3, 5-dihydroxy-4'-methoxystillbene(I), rhapontigenin(II), reveratrol(III), rhaponticin(IV) and piceid(V) and two common flavonoids, apigenin(VI) and luteolin(VII) as active principles of the antitumor property, in vitro, against five kinds of human tumor cell lines, A-549, SK-OV-3, SK-MEL-2, XF-498 and HCT15.
Antitumor Triterpenes from Medicinal Plants
Ryu, Shi Yong,Choi, Sang Un,Lee, Seung Ho,Lee, Chung Ock,No, ZaeSung,Ahn, Jong Woong 영남대학교 약품개발연구소 1995 영남대학교 약품개발연구소 연구업적집 Vol.5 No.-
Thirteen kinds of natura11y occurring or derivatised triterpenes, reported to have an antitumoral property, were reinvestigated on the basis of their direct cytotoxicity or the inhibitory activity on cell growth against five kinds of cultured human tumor cells, i. e., A-549, SK-OV-3, SK-MEL-2, XF498 and HCT15, in vitro. Ursonic acid Ⅲ, betulinic acid Ⅷ, betulonic acid X and glycyrrhetinic acid XI were exhibited a marked inhibition on cell growth.