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한국산 참나무류에 함유된 cis-, trans- MO-lactone의 성분분석 연구
송홍근 건국대학교 생명과학연구원 1995 생명과학지 Vol.2 No.-
The MO-lactone(3-methyl-4-hydroxy octanoic acid γ-lactones) which is decisive compounds in flavor improvement during aging of whisky and/or brandy were extracted from 6 species of Quercus in Korea. These compounds were identified by GC and GC/MS and compared with these from the heartwood of mizunara(Q. mongohra Turez var. grosseserrata Rehd. et. Wils) in Japan. The amount of MO-lactones in 6 oak species were determined comparatively. The highest amounts of MO-lactone were showed in extract from Q. acutissima and others are in order of Q. serrata, Q. alliena, Q. dentata, Q. variabilis and Q. mongolica. Therefore these 6 oak species in Korea can be used possibly as raw materials of liquor aging cask. Q. acutissima was best possible species among them because it contained relatively hightest value of trans-MO-lactones.
김종진,송홍근,한창훈 한국농화학회 2001 Applied Biological Chemistry (Appl Biol Chem) Vol.44 No.4
This study was carried out to investigate the antifungal activities of the extracts from various parts of three Pious species, P. densiflora, P. rigida and P. koraiensis to pathogenic fungus Colletotrichum gloeosporioides. The EtOAc fraction from the bark of P. koraiensis stem and root showed 98.8 and 100% of activity, respectively to the fungus. Median effective doses (ED_(50)) of above two fractions were 469 and 588 ㎍/㎖, respectively in the bioassay with the fungus. ED_(50) of the EtOAc fraction from the bark of P. koraiensis stem against Alternaria brassicicola and Fusarium oxysporum was 533 and 2,277 ㎍/㎖, respectively. This means that the fraction was more sensitive to the C. gloeosporioides and A. brassicicola than the fungus F. oxysporum. The EtOAc fraction from the leaves of P. densiflora showed 39.6% of activity to C. gloeosporioides, but all the fractions from the leaves of two species showed no activity. The active compounds in the bark of P. koraiensis stem and root are being identified.
Changes of Phenol Compounds according to Storing Years in Soybean
김승현,송홍근,한상준,안종국,김정태,정일민 한국작물학회 2004 Korean journal of crop science Vol.49 No.3
The objective of this study was to determine the role of storing years with the variation of total phenol and individual phenolic compounds in soybean (Glycine max L.) seeds. The total phenol content varied from 0.36 to 0.42% over four years, with the highest value (0.42%) found at storage for two and three years. Among the nine soybean varieties examined, Daweonkong had the highest total average phenol content (0.58%). The total content of 11 phenolics varied from 730.0 to 1812.8㎍ g-1 over storage for four years, and the highest concentration (1812.8㎍ g-1) was found at storage for two years. Myeongjunamulkong (1465.4 ㎍ g-1) had the highest mean content among the nine soybean varieties. The total content of 11 phenolic compounds measured in this study occupied from 20.96 to 47.73% of the total phenol contents. The highest total phenol contents were in seeds with black coats (5279.4 ㎍ g-1), while the highest concentration of individual phenolic compounds were in seeds with green coats (1419.5 ㎍ g-1). Our study suggests that it may be feasible to improve soybean varieties with high functional substances such as phenolic compounds.