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돼지에 있어서 Corynebacterium pyogenes의 집단감염보고
백병걸,최인혁,김평길,이재구,Baek Byeong Kirl,Choi In Hyuk,Kim Pyung Gil,Rhee Jae Ku 대한수의사회 1985 대한수의사회지 Vol.21 No.1
Mass outbreak of abscesses of pigs ($28.2\%$) which were observed in a swinery farm in Kimjae, Jeonbug on april 1984, was investigated the etiology and tried to cure the abscesses. The results obtained were as follow; 1. Corynebacterium pyogene
간흡충에 대한 살충성물질에 관한 연구(VI) 향어 체표면 점액내 살충성물질의 구조 확인
이재구(Jae Ku Rhee),김평길(Pyung Gil Kim),안병준(Byung Zun Ahn) 대한약학회 1987 약학회지 Vol.31 No.1
In order to elucidate the defence mechanism of Cyprinus carpio nudus to Clonorchis sinensis, clonorchicidal substance in the epidermal mucus of this fish was isolated by silica gel column and thin layer chromatography and analyzed for its chemical nature by UV, IR and NMR-spectroscopy. The epidermal mucus of the fish was extracted by ethyl ether and separated into 2 fractions by column chromatography using petroleum ether/chloroform(30/70, v/v) as first solvent and methanol as second solvent. The second fraction with greyish white colour showed clonorchicidal effect. The second was again fractionated into greyish white precipitate and clonorchicidal greenish yellow supernatant fraction, by adding petroleum ether and standing the mixture for 5 days at 5oC. The latter was divided into 7 fractions in column chromatography with acetone/benzene(10/90, v/v) as carrier. The fraction on equivalent to the spot of Rf. 0.225 value among them disclosed the strongest clonorchicidal effect. By this purification procedure, clonorchicidal substance was purified 154-fold with 0.9% yield from the mucus of the fish, and 10mg of the final fraction killed the metacercariae in 22 min. Infrared, nuclear magnetic resonance and ultraviolet spectrometric analysis of the purified substance revealed that the substance is linoleic acid. According to the results of the present studies it seemed that this fish could not be proper intermediate host of Clonorchis sinensis, and that defence mechanism of this fish to the worm seems to be correlated with clonorchicidal substance in epidermal mucus.
양한주(Han Ju Yang),김평길(Pyung Gil Kim),김상필(Sang Pil Kim) 대한공업교육학회 1993 대한공업교육학회지 Vol.18 No.2
The study was carried out to suggest measures ofr higher productivity and performance improvement of the solenoid operated pneumatic directional control valves. The main findings of the study were as follows: 1. As for the performance, the home-produced valves are found to be good enough to bear the comparison with the imported ones. But in the aspect of homogeneity, the performance of domestic valves was somewhat of inferior quality. 2. Developement of a small number of materials, test equipment investment and improvement in production control are found to be necessary to obtain homogeneity of products. 3. The results of the investigation of the problems concerned with domestic goods and suggestions for their solution are presented in the table 8.