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식용 식물자원으로부터 활성물질의 탐색-I. -고구마(Ipomoea batatas Lam.) 괴근 주요성분의 분리-
안은미,방면호,김해영,백남인,Ahn, Eun-Mi,Bang, Myun-Ho,Kim, Hae-Yeong,Baek, Nam-In 한국응용생명화학회 1997 Applied Biological Chemistry (Appl Biol Chem) Vol.44 No.4
고구마 괴근을 MeOH 수용액으로 추출하고, 얻어진 추출물을 EtOAc, n-BuOH 및 물로 용매분획하였다. EtOAc 분획에 대하여 column chromatography를 반복하여 4종의 화합물을 분리하였다. 각 화합물의 화학구조를 NMR, MS 등 스펙트럼 데이터의 해석 및 가수분해, 메칠화 및 아세칠화반응을 적용하여, 수지 배당체, simonin I, ${\beta}-sitosterol$ 및 2종의 불포화지방산 화합물로 구명하였다. The MeOH extracts obtained from the tuber of Ipomoea batatas Lam. were solvent-fractionated with EtOAc, n-BuOH, and $H_2O$, respectively. From EtOAc fraction four different compounds were isolated through the repeated silica gel column chromatographies. From not only the results of NMR and MS data but also the adaptation of hydrolysis, methylation, and acetylation, the chemical structures of compounds were elucidated as resin glycoside, simonin I, ${\beta}-sitosterol$, and two kinds of unsaturated fatty acids.
식용 식물자원으로부터 활성물질의 탐색-1 고구마 (Ipomoea batatas Lam .) 괴근 주요성분의 분리
백남인,안은미,방면호,김해영 ( Nam In Baek,Eun Mi Ahn,Myun Ho Bang,Hae Yeong Kim ) 한국응용생명화학회 1997 Applied Biological Chemistry (Appl Biol Chem) Vol.40 No.6
The MeOH extracts obtained from the tuber of Ipomoea batatas Lam. were solvent-fractionated with EtOAc, n-BuOH, and H₂O, respectively. From EtOAc fraction four different compounds were isolated through the repeated silica gel column chromatographies. From not only the results of NMR and MS data but also the adaptation of hydrolysis, methylation, and acetylation, the chemical structures of compounds were elucidated as resin glycoside, simonin I, β-sitosterol, and two kinds of unsaturated fatty acids.
Sophorose의 제조 -Ⅱ. 효모 (Torulopsis bombicola) 배양액 및 회화나무 (Sophora japonica)로부터 Sophorose의 제조
백남인,이미자,이유희,박종대,김해영,김신일 ( Nam In Baek,Mi Ja Lee,You Hui Lee,Jong Dae Park,Hae Yeong Kim,Shin Il Kim ) 한국응용생명화학회 1997 Applied Biological Chemistry (Appl Biol Chem) Vol.40 No.2
A yeast, Torulopsis bombicola, was cultured in the media fortified with soybean oil as a additional carbon source for 7 days with reciprocal shaking. From the culture broth, sophorose-lipid was isolated and treated with alkali to afford sophorose. The sophorose contained in the medium was acetylated and isolated through silica gel column chromatography. The aceylated sophorose was hydrolyzed with 5% KOH at room temperature to give rise to sophorose. Meanwhile, the MeOH extracts obtained from the pod of Sophora japonica was solvent-fractionated with n-BuOH and H₂O, and butanolic layer was chromatographed on silica gel column to afford a flavonoide-glycoside. The glycoside was hydrolyzed with 0.02 N H₂SO₄, to yield sophorose.
오성준,백남인,김해영 경희대학교 생명자원과학연구원 1999 硏究論文集 Vol.20 No.-
We investigated the antioxidative activity to obtain novel antioxidants from plant resources in Korea. Three hundreds species of plants were collected and screened with DPPH (1.1-diphenyl-2-picryl hydrazyl) radical test. From this work. 10 species of plants showed a significant antioxidative activity.
송형석,이지연,오성준,백남인,김해영 경희대학교 생명자원과학연구원 2000 硏究論文集 Vol.21 No.-
We investigated the antimicrobial activity of the hot-water extracts and methanol extracts from medicinal plants. Sixty-two samples were tested by disk diffusion method at concentrations of 5,000ppm and 10,000ppm. Seven species of medicinal plants showed a significant antimicrobial activity against various food-borne microorganisms.
오매(Fructus Mume)의 항산화물질의 분리 및 특성연구
황현주,안은미,백남인,조재선,김해영 경희대학교 생명자원과학연구원 1998 硏究論文集 Vol.19 No.-
천연물로부터 새로운 항산화제를 개발하기 위한 연구의 일환으로 한방에서 사용되는 한약재 중의 하나인 오매(烏梅)의 물 추출물과 메탄을 추출물 및 순차 분획물에 대해 팜유, 우지와 돈지를 기질로하여 유지저아시험, Rancumat method, 전자공여작용 등으로 항산화성을 확인한 결과, EtOAc 분획물에서 강한 항산화 활성을 나타내어 column chromatography, thin layer chromatography를 통하여 활성성분에 관한 연구를 시도하였다. 1. 오매 용매분획물 중 EtOAc 분획물(400 ppm)은 유지저장실험(60℃)에서, 팜유, 우지와 돈지에 모두 우수한 효과를 나타내었으며, 특히 우지에서 높은 활성을 나타내었고, BHA(200 ppm)와 α-tocopherol(200 ppm)보다 활성이 높았다. 2. 오매 EtOAc 분획물(400 ppm)은 Rancimat method에서는 팜유, 우지와 돈지에 비교적 우수한 효과를 나타내었으며, 우지에서 AI가 4.39로 상당히 높은 활성을 나타내었다. 3. 오매의 용매분획물 중 EtOAc 분획물이 DPPH라디칼에 대한 강한 소거활성을 나타내었으며, 그 활성은 EtOAc 분획물의 농도에 의존하여 증가하였고, SC_(50)은 21.2μg/ml이었다. 4. 오매 EtOAc 분획물에서 분리한 8개 획분 중 E4에서 SC_(50)이 16.7μg/ml으로 높은 DPPH 라디칼 소거활성을 나타내었으며, 원인 물질은 여러 가지 스펙트럼 측정 결과 수종 물질이 혼합물인 것으로 밝혀져, 보다 순수한 형태로의 분리 후 정확한 동정의 시도가 요구되었다. Fructus Mume is the roasted hits of Prunus mwme and has been used as tradibonal Chmese medicine. The anboxidatwe effect of the extract from Fructus Mume was measured using different methodsn such as, electron donating abdihes(EDA), Rancimat and oven tests. The methanol extract obtained from the Fructus Mume was solvent-fractionated with ethyl acetate, n-butanol and water, respectively. The ethyl acetate fraction showed the highest antioxidative activity among them. To identify the compounds with antioxidative activity, the isolates from thm layer chromatography were studied further. This study demonstrates that Fructus Mume might be useful for the prevention or treatment of disorders associated with oxidative damage.