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조규종(Kyu Chong Cho),최도영(Do Young choi),전의식(Ui Sik Jeon) 대한피부과학회 1988 대한피부과학회지 Vol.26 No.1
We report s case of angiokeratoma of the vulva occuring in a 36-year-old woman. Numerous grayish dark purple papulovesicular lesions, ranging from 0.2 to 2.0mm in size, were observed on the right labium majus. All lesions were excised under local snesthesia after the diagnosis of angio keratoma was made histopathologically. No new lesions appeared during the follow-up period of one year.
조규종(Kyu Chong Cho),최도영(Do Young choi),전의식(Ui Sik Jeon),오수희(Soo Hee Oh) 대한피부과학회 1989 대한피부과학회지 Vol.27 No.1
We report two cases of hyperkeratosis of the nipple and areola which occurred in 22-year-old woman and 13-year-old girl. The former was suffered from mild pruritic, verrucous thickening and brownish discoloration of both nipples and areolae for 5 years. The latter had asymptomatic, verrucous thickening and dark brownish hyper- pigmentation of the right nipple and areola for 3 years. Both showed mild to marked hyperkeratosis and papillomatosis with increased pigmentation in the basal cell layer histopathologically. In both cases, the lesions were not responsive to the topical medications including steroids and keratolytic agents. Therefore we recommended surgical excision because the patients are greatly disturbed by the appearance of the lesions.
이희섭(Lee, Hee-Sub),김성근(Kim, Sung-Geun),안성훈(Ahn, Sung-Hoon),전의식(Jeon, Ui-Sik),안상열(Ahn, Sang-Yeoul),안병기(Ahn, Byung-Ki) 한국신재생에너지학회 2005 한국신재생에너지학회 학술대회논문집 Vol.2005 No.11
The bipolar plate is a major component of the PEM fuel cell stack, which takes a large portion of stack cost. In this study, as alternative materials for bipolar plate of PEM fuel cells, graphite composites were fabricated by compression molding. Graphite particles mixed with epoxy resin were used as the main substance to provide electric conductivity. To achieve desired electric properties, specimens made with different mixing ratio, processing pressure and temperature were tested. To increase mechanical strength, one or two layer of woven carbon fabric were added to the original graphite and resin composite. Thus, the composite material is consisted of the three phases: graphite particles, epoxy resin, and carbon fabric. By increasing mixing ratio, fabricated pressure and process temperature, electric conductivity was improved. The results of tensile test showed that the tensile strength of two-phase graphite composite was about 5MPa, and that of three-phase composite was increased to 54MPa.
고분자전해질 연료전지 분리판용 복합재의 전기적/기계적 특성
이희섭(Hee-Sub Lee),김성근(Sung-Geun Kim),안성훈(Sung-Hoon Ahn),전의식(Ui-Sik Jeon),안상열(Sang-Yeoul Ahn),안병기(Byung-Ki Ahn) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.11
Fuel cell is one of promising environment-friendly energy sources for the next generation. The bipolar plate is a major component of the PEM fuel cell stack, which takes a large portion of the stack cost. In this study, as the alternative materials of bipolar plate of PEM fuel cells, graphite composites were fabricated by compression molding. P-15 particles were mixed with epoxy resin to provide electric conductivity and structural properties. To find out the most suitable electric properties, graphite composites were fabricated with different mixing ratio, processing pressure and temperature. By increasing mixing ratio and fabricated pressure, electric conductivity was improved due to the smaller gap between the particles. In addition, by increasing process temperature, the electric conductivity was also improved probably by the excited molecular activities and resulting low viscosity of the epoxy resin for better fill of the gaps. The results of mechanical test showed that the tensile strength of graphite composite was about 5㎫.
全義湜,徐舜鳳,全燾基 慶北大學校 醫科大學 1980 慶北醫大誌 Vol.21 No.1
各種 病原材料에서 分離한 Gram陰性菌의 12種의 抗菌劑에 대한 耐性樣相을 보았던바 Pseudnmonas aeruginosa는 大部分이 7劑以上 特히 10劑 및 11劑의 抗菌劑에 耐性이었으며 gentamicin(Gm)에는 30%, carbenicillin에는 56%의 菌이 耐性이었으나 其他抗菌劑에는 74%以上이 耐性이었다. Escherichia coli는 病原材料의 菌과 大便由來의 菌사이에 多少의 差異가 있으며 大便由來의 菌의 耐性率이 多少 낮았다. 6∼9劑에 耐性인 菌이 많으며 Gm에는 0∼9%, nalidixic acid(Na)에는 3∼9%, cephaloridine(Cr)에는 7∼20%, trimethoprim-sulfamethoxazole(Ts)에는 27%, kanamycin에는 11∼53%가 耐性이었고 其他抗菌劑에는 1/2以上 2/3의 菌이 耐性이었다. Klebsiella pneumoniae는 8∼9劑耐性이 많으며 Na에 8%, Cr에 17%, Gm에 25%, Ts에 33%의 菌이 耐性이나 其他抗菌劑에는 42%以上 60%內外의 菌이 耐性이었다. Enterobacter와 Proteus는 全菌株가 耐性이었으나 菌株가 적어서 耐性樣相을 確言할 수 없다. 全供試抗菌劑에 感受性인 菌은 P. aeruginosa에서는 볼 수 없고 E. coli는 24株(18%), K. pneumoniae는 9株(38%)였으며 Ak에 耐性인 菌은 1株도 없었다. Gram-negative pathogenic microorganisms isolated from various clinical specimens were studied by plate dilution method for their resistance to 12 antimicrobial drugs of common clinical use. All of 187 Pseudomonas aeruginosa strains isolated were multiply resistant to four or more drugs, and a majority of them to 10 or 11 drugs. Thirty percent of them were resistant to gentamicin(Gm), 56% to carbenicillin (Cb), and more than 74% to the other drugs tested. Among them, all strains were resistant to nalidixic acid (Na), streptomycin (Sm), and cephaloridine(Cr), but no strain was resistant to amikacin(Ak), There was some difference on the patterns of resistance between Escherichia coli isolated from clinical specimens and those isolated from Shigella-negative stools of diarrheal patients, and the rate of resistant strains to drugs was in general a little higher among the former than the latter. Some strains, 6 among 45 clinical isolates and 18 among 88 fecal strains, were susceptible to all drugs all tested, and the others were resistant to one to 10 drugs. Among them, strains multiply resistant to 6, 7, and 8 drugs were frequently found. Less than 10% of strains were resistant to Gm and Na, 7 to 20% to Cr, 27% to trimethoprim-sulfamethoxazole (Ts), 11 to 53% to kanamycin (Km), and approximately a half to two-thrids of strains from both clinical specimens and stools were resistant to the other drugs except Ak. Among Klebsiella pneumoniae studied, 9 strains among 24 were susceptible to drugs tested, and the others were resistant to one or more drugs, and frequently to 8 and 9 drugs. Two (8%) strains were resistant to Na, 17% to Cr, 25% to Gm, 33% to Ts, and more than 42 to 63% were resistant to the other drugs except Ak. Only small numbers of strains were tested, and it was shown that all strains of Enterobacter aerogenes and Proteus were resistant to one or more drugs. The results of this study showed that Ak was active on all strains tested. A considerable number of P. aerugiuosa strains was susceptible to Cb and Gm, while three-quarters to all strains were resistant to the other drugs. A quite large number of E. coli studied were susceptible to Na, Cr, and Gm, and a little less to Ts and Km Na and Cr were active to the most strains of K. pneumoniae, and three-quarters to Gm. These results suggest that the useful drugs for various infections are decreasing in recent years in Korea.
전의식,서순봉 대한피부과학회 1974 大韓皮膚科學會誌 Vol.12 No.4
Roots of manually extracted scalp hairs among 86 healthy Koreans in different age groups were examined microscopically and the proportion of resting hairs to growing hairs were determined with the followings results. 1. The proportion of resting hairs in all age groups was 10.9% and there was no significant difference between male and female. 2. In each age group the proportion of resting hairs shows difference, being lowest(6.8%) in below 9 years age group, increasing the rate by increasing the age group, highest(19.7%) in over 60 years age group. 3. The proportion of resting hairs below the age of 29 years was below 10%, above 30 years to 49 years in between 10% to 15%, and over 50 years in between 15% to 20%. 4. The normal range of the proportion of resting hairs among normal Koreans was below 20%.