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이황화탄소에 폭로된 근로자들의 말초신경병증에 관한 연구
김대성,김순덕,차철환,Kim, Dae-Seong,Kim, Soon-Duck,Cha, Chul-Whan 대한예방의학회 1993 예방의학회지 Vol.26 No.2
Neurotoxicity in the workplace may occur with exposure to scores of chemicals. Although large acute outbreaks of the occupational neurological disease are rare, the incidence of occupational neurotoxicity in its subtler aspects is unknown. A working knowledge of both the major occupational neurotoxic solvents and the tools used by cliniical neurologists and neurotoxicologists to evaluate neurotoxicity in working populations is a necessity fur the occupational physician. To investigate the effects of carbon disulfide($CS_2$) on the peripheral nerve system using the nervous conduction study, 105 male workers working in the spinning room of a viscose rayon factory were examined and compared with a sex and age matched, unexposed 105 male controls using t-test analysis. 72.4% of $CS_2$-exposed workers complained of neurological symptoms, and the abnormal cases in nerve conduction study were 48.6%. The abnormal cases of nerve conduction study increased in number according as the age and duration of exposure increased. In this study, asymptomatic workers were confirmed to have subclinical neuropathy by nerve conduction study. Also as there were abnormal cases even in its duration of exposure below 4 years, nerve conduction study turned out to be ways of discovering of early peripheral neuropathy. In nerve conduction study, the amplitude, velocity, F-wave latency and H-reflex of the motor and sensory nerves in both upper and lower extremities were significant different between $CS_2$-exposed workers and the controls. From the pathological viewpoint, both segmental and axonal degenerations were assumed in this study.
부직포의 열적 특성과 보온성에 관한 연구(II) -풍속에 따른 충전 용도 변화에 대하여-
김대성,박명수,신현세,주강,Kim, Dae-Seong,Park, Myung-Soo,Shin, Hyun-Sae,Joo, Kang 한국섬유공학회 1989 한국섬유공학회지 Vol.26 No.1
Effects of air velocity and packing density under controlled heating and constant heat flow on thermal insulation of nonwoven fabrics were studied. Results obtained can be summarized as follows; 1. Thermal insulation should be considered in terms of air velocity, packing density, time required to reach thermal equilibrium and thermal behavior. 2. Time for thermal equilibrium decreases with increasing air velocity and decreasing packing density, respectively, while it increases with increasing packing density. 3. Thermal insulation is fairly sensitive to increasing packing density at the air velocity of 0.5m/sec while it becomes less sensitive to increasing air velocity, representing almost constant values at the air velocity of more than 2.0m/sec. 4. Thermal insulation effeciency of nonwoven fabrics makes than 10 percent, providing unfavorable thermal insulation effect.