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RISS 인기검색어
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- 저자 : 유승조(Seung Jo Yu) (검색결과 5 건)
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유승조(Seung Jo Yu) 한국생약학회 1970 생약학회지 Vol.1 No.3
So far, the cultivated peony is known to be originated from an indigenous species, Paeonia-albiflora PALLAS var. trichocarpa BUNGE (PAT). In this study, these two species were morphologically examined in the external and internal feature and in the pattern of callus formation by tissue culture. Also, they were compared with another indigenous species, P. japonica MIYABE et TAKEDA var. pilosa NAKAI (PJ) , which were regarded as being scarcely related to them. The root of the cultivated peony is massive consisting with several storage roots, each of them is a hypotrophic and fusiform. The root of PAT consists of several storage roots, each of them is branching and slender. And the storage root of PJ is short, bended buried horizontally, protruding a number of corpulent lateral root. The secondary xylem of the cultivated peony is small clusters of vessels and xylem fibres are arranged in scalariform and among these cluster, single vessel is joined, but that of PAT is small clusters of vessels are arranged in separate scalariform but are not connected with each other and that of PJ is vessels and xylem fibers are grouped together in elongated clusters that radiate outward from the center. Protoxylem of the cultivated peony is surrounded by four large metaxylem, but that of PAT and PJ by seven. On the other hand, the callus formation patterns of these peonies were different; the cultivated peony callus is formed in an orderly fashion by the mammalate meristematic cell groups, PAT callus is in disorder by the meristematic cells arranged in linear, and PJ callus is in order by the meristematic cells arranged in linear. By the comparison of three different plants in the anatomical appearance and the callus formation pattern, it is evident that the cultivated peony is not derived from PAT.
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매자나무과 식물의 Alkaloid 연구 - 왕매발톱나무의 Alkaloid 성분
이용주(Yong Choo Lee),유승조(Seung Jo Yu),이성규(Sung Kyu Lee),박동하(Dong Ha Park) 한국생약학회 1971 생약학회지 Vol.2 No.1
Examination of the alkaloids in the stem of Berberis amureusis RUPRECHT var. latifolia NAKAI was carried out. As tertiary bases, the biscoclaurin type base berbamine and oxyberberine as the berberine type were isolated, and jatrorrhizine, berberine, shobakunine as the berberine type and the aphorphine type magnoflorine were obtained as the quarternary bases.
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이숙연(Sook Youn Lee),유승조(Seung Jo Yu),지형준(Hyung-Joon Chi) 한국생약학회 1987 생약학회지 Vol.18 No.3
Veronicastrum sibiricum (L.) Pennell (Scrophulariaceae) is a perennial herb growing in moist land. It has been used as a korean folk medicine in treating common cold, leucorrhea, cystitis and liver damage and as cholagogue. The present study dealt with the elucidation of the chemical components. From the roots of the plant, five iridoids were isolated and identified as minecoside (mp 142∼3°), 6-O-veratryl catalpol ester (mp 216∼8°), catalpol (mp 204∼6°), aucubin (mp 180∼2°) and 6-desoxy-8-isoferuloyl harpagide (mp 139∼41°). Furthermore, β-sitosteryl-3-O-D-glucoside, campesteryl 3-O-D-glucoside, β-sitosterol, campesterol, stigmasterol and mannitol were also isolated.
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서울에서 分離된 腸內細菌의 抗生劑耐性과 耐性傳達因子에 관한 硏究
劉承兆,金勝喜,염곤 成均館大學校 1980 論文集 Vol.28 No.-
Studies on drug resistance and R-factor of enteric bacterial flora isolated from Seoul area(June 1978∼Sept. 1978). Drug Resistance and the distribution of R-factor were examined using Escherichia coli, Salmonella, Shigella, Enterobacter and Klebsiella isolated from patients in Seoul area from June 1978 through Sept. 1978. 1. Of Escherichia coli, 147 strains (87.50%) were resistant to Ampicillin, but 2 stranins (1.19%) only were resistant to Nalidixic acid. Of Shigella, no strains were resistant to Gentamicin, and the persectage of resistancd to Streptomycin was highest (26.53%). Of Salmonella, no strains were resistant to Nalidixic acid, Tetracyclin, Gentamicin, Chloramphenicol, but the percentage of resistance to Streptomycin was high (95.04%). Of Enterobacter, 100% were tesistant to Amplicillin and Tetracyclin and of Klebsiella, 100% were resistant to Ampicillin. 2. Of Escherichia coli, most of strains were multiply resistant, while only 2 strains were singly resistant. Of Salmonella, 88.14% of resistant strains were singly resistant and of Enterobacter, all of 29 resistant strains were multiply resistant. 3. Escherichia coli, transferred R-factor in 81.76%, Shigella 25.00%, Klebsiella 93.48%, Enterobacter 86.96%, while Salmonella didn't transfer R-factor at all. 4. 23 resistant patterns of R-factor were found ifn Escherichia coli, 4 resistant patterns in Shigella, 7 resistant patterns in Klebsiella, and 3 resistant patterns in Enterobacter, especially, a resistant pattern of R-factor (AP)^r was 54.62% in Escherichia coli, 57.1% in Shigella, and 35.00% in Enterobacter, which was the highest one of resistent patterns of R-factor, while (AP, TC)^r was 48.84% in Klebsiella. 5. According to the result of examination, the multiply resistant strains transferred R- factor more easily than the singly resistant strains.
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염곤,劉承兆,李長勳 成均館大學校 科學技術硏究所 1985 論文集 Vol.36 No.1
The pathogenesis of gastrointestinal infections caused by E. coli has been attributed to the ablility of some strains to produce enterotoxins or to invade the intestinal mucosa directly. Enterotoxigenic strains may produce either a heat-labile toxin(LT), a heat-stable toxin(ST) or both LT and ST. The heat-labile enterotoxin of E. coli causes a diarrhea with a delayed onset and similalar to cholera toxin in its mode of action and immunogenicity. In contrast to LT, ST is of low molecular weight, nonimmunogenic, and not neutralized by cholera or LT antitoxin. The infant mouse test was used for the detection of ST and EnzymeL-inked Immunosorbent Assay was used to dettect LT, and serological test was used to detect Enteropathogenic E. coli and Enteroinva sive E. coli. And biochemical examinations were done. 1. Strains of pathogenic E. coli isolated from the diarrheal patients in Seoul were identifided in 68 (21.3%) of 319 cases. 2. Stranis of enterotoxigenic E. coli was detcetected in 56 cases; 49 were positive for heat-labile enterotoxin and 1 was positive for only the heat-stable enterotoxin. 3. Strains of enteropathogenic E. coli was detected in 10 cases. 4. The serotypes of enteropathogenic E. coli were 026 : K60, 055 : K59, 0111 : K58, 0119 : K69, 0126 K71, 0128 : K67, 01 : K51. 5. D-mannitol, lactose, maltose were used for growth in toxigenic E. coli. Malonate utilization, urease activity, gelatin liquefaction were negetive in enteropathogenic E. coli, enterotoxigenic E. coli and enteroinvasive E. coli.
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