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Streptomyces sp . no . 46 이 생산하는 살충성 물질의 구조 동정
오세량(Sei Ryang Oh),이형규(Hyeong Kyu Lee),구본탁(Bon Tak Koo),최수근(Soo Keun Choi),박상구(Sang Gu Park),신병식(Byung Sik Shin),박승환(Seung Hwan Park),김정일(Jeong Il Kim) 한국응용생명화학회 1994 Applied Biological Chemistry (Appl Biol Chem) Vol.37 No.2
In searching for new insecticidal compounds from soil microorganisms, strains of streptomyces species showed insecticidal activities on Musca domestica and Bombyx mori were selected. Compounds Ⅰ-Ⅳ, which were isolated from the metabolites of no. 46 strain, were identified as piericidin C₁, C₂, C₃ and D₁, respectively by UV and NMR data analyses.
오세량(Sei Ryang Oh),정근영(Keun Young Jung),이형규(Hyeong Kyu Lee) 한국응용생명화학회 1996 Applied Biological Chemistry (Appl Biol Chem) Vol.39 No.2
To screen inhibitors on complement system from natural resources, micro-screening method was established by using hemolytic complement assay. Complement fixation reaction was carried out in the microplate system. For standard hemolysis (50% hemolysis) of the classical pathway (CP), hemolysin and complement serum were diluted to 1/75∼1/100 and 1/80∼1/120, respectively, when sheep erythrocytes were 5.0×10^8 cells/㎖. In case of the alternative pathway (AP), complement serum was diluted to 1/5 and EGTA and Mg^(2+) were added 4 mM, 4∼8 mM, respectively, when rabbit erythrocytes were 4.0×10^8 cells/㎖. Dimethyl sulfoxide was used for the assay of non-aquous soluble compounds or extracts and its final concentration was not more than 1%. Three phenylpropanoids showed anticomplementary activities in proportion to the concentration for both pathways and rosmarinic acid exihibited the highest inhibitory activities: 5.4±3.6%(0.063 mM)∼95.8±0.2%(0.5 mM) and 35.1±0.9%(0.063 mM)∼95.6±1.1%(1 mM) on the CP and the AP, respectively.
방선균 분리주 No . 2077 이 생산하는 살충성 물질 SR 2077 의 구조 동정
오세량(Sei Ryang Oh),이형규(Hyeong Kyu Lee),최수근(Soo Keun Choi),김정일(Jeong Il Kim) 한국응용생명화학회 1994 Applied Biological Chemistry (Appl Biol Chem) Vol.37 No.4
During the screening of insecticidal compounds from soil microorganisms, SR 2077 was isolated from the metabolites of Actinomycetes isolate No. 2077 and identified as albocyctine by UV and NMR data analyses.
감국(Chrysanthemi Flos)의 새로운 알킬알콜배당체 성분에 관한 연구
정근영,오세량,김천석,김정희,이형규,Jung, Keun-Young,Oh, Sei-Ryang,Kim, Chun-Suk,Kim, Jung-Hee,Lee, Hyeong-Kyu 한국생약학회 1996 생약학회지 Vol.27 No.1
In the course of phytochemical studies of Chrysanthermi Flos(Chrysanthemum indicum L., Compositae), two compounds were isolated by repeated column chromatography. Compound 1 is identified as adenosine on the basis of spectroscopic means and comparison with an authentic standard. Compound 2 is determined to be a new alkyl alcohol glycoside, 1-octen-3-ol $3-O-{\beta}-D-xylopyranosyl(1{\rightarrow} 6)-{\beta}-D-glucopyranoside$ on the spectroscopic evidence. Compounds 1 and 2 are reported for the first time from this plant.
UPLC-QTOF-MS분석를 이용한 국내산 더덕 주산지의 표지물질 선정
안영민 ( Young Min An ),장현재 ( Hyun-jae Jang ),김두영 ( Doo-young Kim ),백남인 ( Nam-in Baek ),오세량 ( Sei-ryang Oh ),이대영 ( Dae Young Lee ),류형원 ( Hyung Won Ryu ) 한국응용생명화학회 2021 Journal of Applied Biological Chemistry (J. Appl. Vol.64 No.3
Codonopsis lanceolata (Deoduk) was grown in East Asia, including Korea, China, Japan, and Russia, and the roots of C. lanceolata have been used as functional foods and traditional medicine to treat symptoms of cough, bronchitis, asthma, tuberculosis, and dyspepsia. The phytochemicals of C. lanceolata have been reported such as phenylpropanoids, polyacetylenes, saponins, and flavonoids that are involved in pharmacological effects such as anti-obesity, anti-inflammation, anti-tumor, antioxidant, and anti-microbial activities. Selecting marker substances of the main producing area by MS-based metabolomics analysis is important to ensure the beneficial effect of C. lanceolata without side-effects because differences in cultivated areas of plants were related not only to the safety of medicinal plants but also to changes in chemical composition and biological efficacy. In our present study, ultra-performance liquid chromatography quadrupole time-of-flight mass spectrometry combined with multivariate statistical analysis was applied to recognize the main producing area of C. lanceolata in South Korea. As a result of Principal Component Analysis and loading plot analysis of three groups, Inje (Kangwon-do), Hoengseong (Kangwon-do), and Muju (Jeonlabuk-do), several secondary metabolites of C. lanceolata including tangshenoside I, lancemaside A, and lancemaside G, were suggested as potential marker substances to distinguish the place of main producing area of C. lanceolata.
참느릅나무(Ulmus parvifolia) 잎 추출물 분석 및 안정성 평가
김두영 ( Doo-young Kim ),송수빈 ( Soobin Song ),김일주 ( Iljoo Kim ),정세규 ( Se-kyoo Jeong ),김성우 ( Sungwoo Kim ),김정희 ( Jung-hee Kim ),장현재 ( Hyun-jae Jang ),오세량 ( Sei-ryang Oh ),류형원 ( Hyung Won Ryu ) 한국응용생명화학회 2020 Journal of Applied Biological Chemistry (J. Appl. Vol.63 No.4
A simple and reliable HPLC method was developed to determine pharmacologically standard marker compounds of Ulmus parvifolia leaves. Standard markers were characterized with neochlorogenic acid (trans-5-O-caffeoylquinic acid, 5-CQA) and chlorogenic acid (trans-3-O-caffeoylquinic acid, 3-CQA) using NMR and UPLC-QTof-MS analysis. A method for qualitative/ quantitative analysis of the leaves extracts were evaluated including two compounds by using HPLC. The stability test of 30% ethanolic extracts of the leaves sample and standard markers have been evaluated for six months. However, no significant changes in the content of the marker compounds of each extract was observed during the time of investigation.