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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.
2D - NMR 기법을 이용한 ( 2OS ) - 와 ( 2OR ) - ginsenoside Rh2 의 1H - 및 13C - NMR Signals 의 완전 동정
백남인(Nam In Baek),김동선(Dong Seon Kim),이유희(You Hui Lee),박종대(Jong Dae Park),정소영(So Young Jeong),이천배(Chun Bae Lee),김신일(Shin Il Kim) 한국응용생명화학회 1995 Applied Biological Chemistry (Appl Biol Chem) Vol.38 No.2
(20S)- and (20R)-Ginsenoside Rh₂ were prepared from crude ginseng saponin by chemical treatments. The ¹H- and ^(13)C-NMR signals of these compounds were fully assigned by various NMR techniques such as DEPT, ¹H-¹H COSY, HMQC, HMBC and NOESY.
Sophorose 의 제조 - Ⅰ. D - Glucose 로부터 sophorose 의 화학적 합성
백남인(Nam In Baek),박종대(Jong Dae Park),이유희(You Hui Lee),김신일(Shin Il Kim),(Victor P . Anufriev) 한국응용생명화학회 1996 Applied Biological Chemistry (Appl Biol Chem) Vol.39 No.6
Sophorose (2-O-β-D-glucopyranosyl-D-glucopyranose) was chemically synthesized from D-glucopyranose through six steps of chemical reactions with the yield of 21%. The chemical structures of sophorose and some compounds obtained during reactions were confirmed by interpretations of spectral data, NMR, IR, etc.
(20R)-파낙사디올과 (20R)-파낙사트리올에 대한 $^1H$- 및 $^{13}C-NMR$의 완전동정
김동선,백남인,박종대,이유희,김신일,Kim, Dong-Seon,Baek, Nam-In,Park, Jong-Dae,Lee, You-Hui,Kim, Shin-Il 대한약학회 1996 약학회지 Vol.40 No.3
The $^1H$- and $^{13}C$-NMR signals of (20R)-panaxadiol and (20R)-panaxatriol were completely assigned by the extensive application of modern 2D-NMR techniques, $^1H-^1H$ COSY, HMQC and HMBC.
답토양(畓土壤)에서의 시비규산(施肥珪酸)과 인산(燐酸)의 상호작용(相互作用)에 관(關)한 연구(硏究)
임선욱,백남인,Lim, Sun-Uk,Baek, Nam-In 한국토양비료학회 1983 한국토양비료학회지 Vol.16 No.4
답토양(畓土壤)에 시용(施用)한 규산(珪酸) 및 인산질비료(燐酸質肥料)의 토양중(土壤中)에서의 가급성(可給性)에 대한 상호간(相互間)의 작용(作用)과, 수도체(水稻體)에 의한 양성분(兩成分)의 흡수(吸收)에 미치는 상호관계(相互關係) 및 수도체(水稻體)의 생육(生育)에 미치는 영향(影響)을 시험(試驗)하기 위하여 수도품종(水稻品種) "진흥(振興)"에 규산질비료(珪酸質肥料)와 과인산석회(過燐酸石灰)를 각각(各各) 다른 수준(水準)으로 처리(處理)하여 재배시험(栽培試驗)한 결과(結果)는 다음과 같다. 1. 토양중(土壤中)에서는 규산(珪酸)과 인산(燐酸)은 상호간(相互間)에 길항적(拮抗的)으로 작용(作用)하여 두 성분(成分)의 유효도(有效度)를 저하(低下)시키는 경향(傾向)이었다. 2. 규산질비료(珪酸質肥料)의 시용량(施用量)이 많을수록 토양(土壤)의 pH가 상승(上昇)하였다. 3. 규산(珪酸)은 시용수준(施用水準)이 높을수록 수도체(水稻體)가 흡수(吸收)하는 규산(珪酸)의 양(量)은 증가(增加)하였으나 인산(燐酸)은 시용수준(施用水準)이 높아져도 체내(體內)의 인산(燐酸)의 양(量)은 증가(增加)하지 않았다. 4. 수도체(水稻體)에 의한 규산(珪酸)의 흡수(吸收)는 인산시용(燐酸施用)에 의해 뚜렷이 억제(抑制)되었으며 인산(燐酸)의 흡수(吸收)는 규산(珪酸)의 시용량(施用量)이 많을 때에는 뚜렷이 억제(抑制)되었으나 규산(珪酸)의 시용량(施用量)이 그보다 낮을 경우에는 생육시기(生育時期) 및 수도체(水稻體)의 부위(部位)에 따라 인산(燐酸)의 흡수(吸收)가 억제(抑制) 또는 촉진(促進)되는 경향(傾向)이었다. 5. 규산(珪酸)과 인산(燐酸)의 증시(增施)는 초장(草長), 분얼수(分蘖數) 및 이삭중(重)을 증가(增加)시켰고, 건물량(乾物量)은 일정(一定)한 경향(傾向)을 보이지 않았다. To investigate interactions of silicate and phosphate applied in paddy soil, different levels of the two fertilizers were treated on pots of Jinheung variety of Japonica rice, then availability and absorption of the silicate and phosphate and growth of the rice plant were analyzed. The availability of silicate applied in soil was reduced by increased application of phosphate and this antagonism implied the interaction of silicate and phosphate in soil. The silicate absorption by rice plants was remarkably reduced by the phosphate application, while the phosphate absorption was reduce only at high levels of silicate. At low levels of silicate, the phosphate absorption was affected differently depending on growth stage or parts of the rice plant. The application of silicate fertilizers increased the pH of the soils. The application of silicate and phosphate fertilizers improved the plant height, the tiller number, and the grain weight, but not the dry weight of the grain. The effect of interaction of silicate and phosphate on the plant growth did not appeared.
비목나무(Lindera erythrocarpa) 잎으로부터 항진균성 활성물질의 분리
권순열,김진호,백남인,최경자,조광연,이병무,최용화,Kwon, Sun-Youl,Kim, Jin-Ho,Baek, Nam-Ln,Choi, Gyung-Ja,Cho, Kwang-Yun,Lee, Byung-Moo,Choi, Yong-Hwa 한국응용생명화학회 2003 한국농화학회지 Vol.46 No.2
비목나무 잎의 메탄올 추출물을 n-hexane, ethylacetate, n-butanol, $H_2O$으로 순차적으로 용매분획하였다. Ethylacetate 분획으로부터 silica gel chromatography를 반복하고 재결정하여 활성물질을 분리 정제하였다. 화합물은 NMR과 MS의 기기분석 결과 methyllucidone의 입체이성질체 혼합물로 구조결정 되었다. 이 혼합물은 밀 붉은녹병에 대하여 $50\;{\mu}g/ml$에서 85%의 방제효과를 나타내었다. Methanol extract obtained from Lindera erythocarpa leaves was successively fractionated with n-hexane, ethylacetate, n-butanol, and $H_2O$. From ethylacetate fraction, an active fraction was isolated through repeated silica gel column chromatography and recrystallization, and was identified as a stereoisomer complex of methyllucidone by MS and MMR analyses. The complex showed 85% antifungal activity at 50 {\mu}g/ml$ against the disease wheat leaf rust.