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폴리에스테르/면 혼방품-분산염료/반응염료 1욕 염색계에서의 염료의 안정성에 관한 연구(II) -1욕 염색 조건에서 염료의 분해-
김석홍,김노수 한국섬유공학회 1991 한국섬유공학회지 Vol.28 No.8
Decomposition of disperse dyes in alkaline dyebath was measured using thin-layer chromatography. The stability of reactive dyes in aqueous solution with and without disperse dyes was studied by measuring hydrolysis rate of the dye at various temperature and pH condition. Disperse dyes were decomposed in reactive dyeing condition and the tendency of decomposition varied significantly according to the structure of the dyes. The presence of disperse dye decreased the amounts of hydrolyzed reactive dye in one bath dyeing system.
김석홍,김준호,이홍기 한국소음진동공학회 1992 소음 진동 Vol.2 No.4
The prediction of vibration response of floor is necessary in order to check whether the floor vibration level will satisfy the allowable vibration standard of precise machinery such as electronic microscopes in semiconductor manufacturing plant before the installation of various neighboring equipment facility. In conventional vibration isolation, we were mainly interested in minimization of vibration transmissibility and stabilization of vibration isolation system. But in order to predict vibration response of floor, it is necessary to know exciting force of equipment installed on the floor and the mobility of the floor. We measured the exciting force of the dropped mass assumed as equipment and the mobility of some practical building floor using large impact hammer. And from this we predicted the vibration response of floor on which the mass dropped. This predicted vibration response of floor is compared with measured vibration response. Through upper procedure, we examined the possibility of predicting vibration response of floor from the information of exciting force of equipment and the mobility of floor.
김석홍,이성춘,김준호 한국소음진동공학회 1993 소음 진동 Vol.3 No.1
In order to maintain comfortable life environment around railroad site, noise from train itself, and to train & rail interaction, and the vibration transmitted through the ground should be controlled to the extent of permissible level. In order to achieve this, the basic railroad noise & vibration data such as magnitude and frequency characteristics of them are necessary to establish the counterplan for railroad noise & vibration. In this study, we measured and analysed the characteristics of time variation, frequency, direction and distance attenuation of noise and vibration of the railroad between Seoul and Pusan.
Bola형 전해질이 Orange ll/양모 섬유 염색계의 염색거동에 미치는 영향
김석홍,고가성일 한국섬유공학회 1998 한국섬유공학회지 Vol.35 No.2
The effects of bola-form electrolytes on the dyeing behaviors in Orange II/wool dyeing system were studied. For these purposes, four different bola-form electrolytes were synthesized by the reactions of pyridine and 1,4-dibromobutane, 1,6-dibromohexane, 1,8-dibromooctane or 1,10-dibromodecane, respectively. It was found that wool fabrics treated by electrolytes prior to dyeing were dyed in lower temperature even in the medium of distilled water. A dyeing time of 10-20 mins at 90 $^{\circ}$C in the medium of distilled water was enough when the wool fabric was pretreated by the electrolytes. The differences in the number of the carbon atoms present in bola-form electrolytes did not affect on the K/S values of dyeings. The presence of the bola-form electrolytes in dyebath did not show significant changes in the dyeing behavior because of its lower concentrations in this study.
음향인텐시티법을 이용한 공조 덕트소음기의 감음성능평가방법에 관한 연구
김석홍,손장열,오재응,김여식,Kim, Seok-Hong,Son, Jang-Yeol,O, Jae-Eung,Kim, Yeo-Sik 한국음향학회 1987 韓國音響學會誌 Vol.6 No.2
실험실이 아닌 일반음장에서 음향인텐시티법을 이용하여 공조덕트 소기기의 감음성능 평가방법을 검토하였다. 음향인델시티법에 의한 감음량 측정치는 음압법에 의한 측정치보다 이논치와 비교적 잘 일치하였으며, 음향인텐시티법은 음압법에 비하여 음장조건에 따른 영향을 비교적 적게 받는 것으로 나타났다. This paper is to suggest the test method of sound attenuation caused by absorptive duct silencer using sound intensity method in field. In order to estimate sound attenuation, sound power being radiated from sound power source and duct exhaust terminal was measured by the sound pressure method and sound intensity method in semianechoic and common room. The results of the measured sound attenuation values by sound intensity method are more similar to those of theoretical calculation than those by the sound pressure method. In addition, sound intensity method is much less influenced by sound field condition or continuous background noise than the sound pressure method.
간접면역형광항체법에 의한 Rickettsia tsutsugamushi 항체가 분포 : 전라남도
김석홍 광주보건대학 1996 論文集 Vol.21 No.-
Tsutsugamushi disease(scrub typhus), the major cause of febrile illness in Korea, is caused by Rickettsia tsutsugamushi. Since several U.N. army patients of tsutsugamushi disease in Korea were first reported in 1951, the case had not been reported for more than 30 years until 1985. The first Korean tsutsugamushi patients were recognized in 1986 and the disease has been found to be prevalent in all areas of Korea. R. tsutsugamushi was also isolated in Korean residents in 1987. Thereafter, tsutsugamushi disease has been shown to be widely spread throughout the country. Especially, the seropositive rate to R. tsutsugamushi among the patients with acute febrile episodes during October through November were 40-50%. To understand the sero-epidemiological patterns of scrub typhus in Chollanam-do, 131 patients sera with acute febrile episodes from 24 local health centers were tested for the antibody to R. tsutsugamushi by indirect immunofluorescent antibody technique from January to December in 1995. Out of 131 patients, 95(72.5%) patients showed positive reaction to R. tsutsugamushi and the male outnumbered the female slightly. 37.9% of seropositives to R. tsutsugamushi was in the age of the sixties and between the forties and sixties of the age were 82.1%. Among 24 local health center, 23 showed positive reaction to R. tsutsugamushi. Scrub typhus was the most prevalent in October and November, showing 87.2% of total. These results might provide the basic information for the management of scrub typhus in Chollanam-do, where the epidemiological studies on scrub typhus was not carried out enough.