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김명조 한국자원식물학회 1998 한국자원식물학회지 Vol.11 No.1
For the comparison of the urushiol composition and biological acitivity between the fresh sap and fire distilled sap of lacquer tree(Rhus vernicifera), we analysed the urushiol composition by HPLC and EI-MS, and investigated the antioxidative , antimicrobial and anticancer acitivities according to solvent fractionations. There was no difference in the urushiol composition between fresh and fire distilled saps of lacquer tree. The hexane frqctionsof two saps showed a strong DPPH radical scaverging activity (RC50 : 7.0-7.5$\mu\textrm{g}$). They also showed a strong antifungal activity onthe spore germination of Cladosporium herbarum(MIC : 8$\mu\textrm{g}$/ml), whereas they have no or low activity against the bacteria(BAcillus subtilis , Escherichia coli). In addition , hexane and butanol fractions of two saps showed a strong inhibitory activity against cultured tumour cell lines (GI50 : 0.35, 12.29$\mu\textrm{g}$/ml) in vitro. These results confirm that the fresh sap and fire distilled sap might have the similar urushiol compositions and biological activities.
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한국 내 외국인 이주민의 공간 분포와 군집 특성에 관한 연구
김명조,이제승 한국지역학회 2024 지역연구 Vol.40 No.4
This study examines the trends and typologies of foreign immigrants in Korea over the past decade. Based on indicators such as total population, total foreign population, visa type, nationality, Gross Regional Domestic Product (GRDP), the number of industrial complexes, and designation as population-declining areas, this study identifies characteristics of regions with over 5% foreign population through K-means clustering analysis. Results reveal five distinct groups of residential patterns among foreign immigrants, including densely populated areas of Chinese immigrants in metropolitan regions, population-declining regions with unskilled labor concentration, education-oriented cities with numerous higher education institutions, and manufacturing clusters driven by industrial complexes. These clustering characteristics highlight that the distribution of foreign immigrants is influenced not only by their nationality and purpose of stay but also by the economic opportunities and social conditions of each region. This study explores the spatial distribution of foreign immigrants through county and district-level analyses, emphasizing the importance of employing more granular spatial units and time-series approaches in future research to achieve a deeper understanding of their residential patterns and economic activities.
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산돌배나무(Pyrus ussuriensis Maximowicz) 열매의 항산화 물질 분리 및 구조
김명조,임요섭,송원섭,김이훈,유창연 한국약용작물학회 1999 한국약용작물학회지 Vol.7 No.4
예로부터 식품으로 사용되어온 산돌배나무 (Pyrus ussuriensis) 열매를 대상으로 항산화 활성 성분을 찾기 위하여 그 MeOH추출물의 EtOAc분획을 대상으로 column chromatography를 실시하여 1, 4-dibenzenediol, chlorogenic acid 및 quercitrin등 세종의 화합물을 분리하고 DPPH free radical소거법을 이용하여 항산화활성을 측정하였다. 이중 quercitrin은 a-tocopherol 및 BHA보다 낮은 활성 (RC50=20μg)을 보였으나 1, 4-dibenzenediol (RC50=0.4μg) 와 chlorogenic acid (RC50=4μg)는 강한 활성을 보였다.
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