일본에 있어서 작업환경측정의 (作業環境測定) 정도관리 (精度管理)

이광묵 ( Kwang Mook Lee ) 한국산업위생학회 1992 국제학술대회 초록집 Vol.1992 No.-

우리나라 고속도로 톨게이트의 대기오염에 관한 조사연구

노영만(Young Man Roh),박정일(Chung Yill Park),정치경(Chee Kyung Chung),이광묵(Kwang Mook Lee),민병기(Byung Ki Min),이승한(Seung Han Lee) 대한직업환경의학회 1990 대한직업환경의학회지 Vol.2 No.2

2.45GHz ZigBee 시스템의 모뎀 구현을 위한 Timing Estimator 알고리즘 설계

강신우(Shin-Woo Kang),도주현(Joo-Hyun Do),조군식(Koon-Sik Cho),이광묵(Kwang-Mook Lee),최형진(Hyung-Jin Choi) 한국통신학회 2005 한국통신학회 학술대회논문집 Vol.2005 No.6

고농도의 연폭로근로자들에서 혈중연량과 Dithiothreitio로 처리된 δ-aminolevulinic acid dehydratase 활성비(ALAD Ratio)와의 상관관계

김형아,이원철,이광묵 가톨릭대학산업의학센타 산업의학연구소 1992 韓國의 産業醫學 Vol.31 No.4

The ??-aminolevulinic acid dehydratase activity(??-ALAD) and the ratio of activated to inactivated ??-ALAD treated with dithiothreitol of whole blood was measured to evaluate the correlation between the ratio and blood lead level. Zinc protoporphyrin(ZPP), the indices most widely used in screening of lead absorption and blood lead were also measured. These parameters indicative of lead exposure were measured in whole blood from 57 highly lead exposed workers(most of them, ZPP was higher than 100ug/100ml), and from a group of 15 control subjects not exposed to undue environmental lead. We found that the correlation coefficient between the ratio and the blood lead level(r=0.58) was slightly greater than the correlation cofficient between the log inactivated ??-ALAD and the blood lead level(r=-0.51) among 57 highly lead exposed workers.

트리클로로에틸렌을 취급하는 근로자의 요중 층삼염화물 농도와 공기중 트리클로로에틸렌의 농도

김형아,이광묵 가톨릭대학산업의학센타 산업의학연구소 1989 韓國의 産業醫學 Vol.28 No.1

For the purpose of obtaining reference data for the organic solvent poisoning, we analyzed the air trichloroethylene concentration and urinary total trichlorocompounds in workshop where trichloroethylene used washing solvents. Urine samples collected from 13 exposed workers (6 male, 7 female workers) and 10 non-exposed workers(7 male, 3 female workers) were analyzed for total trichloro-compounds and trichloroacetic acid. Trichloroethylene concentration in working environments was conducted. The results were as follows; 1. Trichoroethylene concentration in washing tank and drying were 19.8-50.3 and 130.8-456.2 ppm respectively. 2.Urinary total trichlorocompound levels and trichloroacetic acid level in 13 exposed workers were 577.0±240.9㎖/ℓand 270.8±146.3㎖/ℓrespectively. While non-exposed 10 workers were 7.1±8.2㎖/ℓand 0.5±1.0㎖/, respectirely The difference between two groups was statically significant(p<0.001).

충남 옥천군 군서지역에 있어서의 환경위생적 조사연구

이병국,맹광호,이광묵 최신의학사 1975 最新醫學 Vol.18 No.2

An Environmental and santiary survey was carried out on 585 houses and 36 wells in Gunseo Area, Okcheon-Gun, Choongbook Province. As a survey on sanitary environments of houses, number of rooms they were using, artificial lightening method, house heating method and sanitary measures in the kitchen were checked. Sanitary environments of drinking water sources were also investigated. Other tested items with water samples were hardness, pH, and chloride ion, and the results were summarized as follows: 1. 38.1 % of all subjected households were using 2 rooms and 29.4%, 3 rooms. 97.0% of all households were lightening their houses with oil lantern and those who were using elec tric lights were 1.7%. Those who were using coal briquett for their house heating were 12 households (2.0%). 7.4% of all households did not have any cupboard in their kitchens and those who were using dry wiping cloth were only 30.3% among all subjected housholds. 2. Main drinking water source was well (78.3%) and the pump was next (15.0%). 33.3% of all drinking water sources were beeing used by more than 6 househods. 96.1% of all drinking sourees (except pumps) were not covered and the drainage was bad in 30.0% of all drinking sources. 3. 47.0% of all households were disposing sewage unsanitarily and most of the rubbishes (93.2%) were beeing used for a compost. 4. 1% of the households were throw them away around their houses. Excrements were beeing used for fertilizer among 97.9% of all households. 4. The average hardness of 36 sampled well water was 188 ppm and the hardness of 7 samples(19.5 %) were over 300 ppm. 5. The average pH of 36 well surveyed were 6.48. Two samples were below 5.5 and 4 were over 7.1. 6. The average chloride ion of all samples were 75.2 ppm. The chloide ion of 4 samples were over 150 pPm, the international standard for drinking water.

탈지작업 근로자의 트리클로로에틸렌 폭로에 관한 조사

박두용,김형아,김창엽,백남원,조정진,김양호,이광묵 가톨릭대학 산업의학 쎈타 산업의학연구소 1989 韓國의 産業醫學 Vol.28 No.4

Trichloroethylene(TCE) is a widely used organic solvent, especially in degreasing process of metal manufacturing, however few data concerning its exposure and poisoning were obt-ainable. This survey was performed for more information of TCE exposure in this country. Urine sanmples were collected from 144 TCE handling workers and 46 non-TCE-exposed workers. TCE concentrations of four workshops in working environment were analyzed. The results were as follows; 1. TCE exposed workers were 48 male and 96 female employees. Average total duration of employment of these workers was 39.0 months, average duration of works per day was 10.7 hours, and average duation of TCE handling was 469.7 minutes. 2. The average concentration of urine total trichloro-compounds was 156.32㎎/ g crea-tinine, and that of trichloroacetic acid was 69.2㎎/g creatinine. Of those workers, 78 workers had the concentrations of urine trichloroacetic acid over 75㎎/g, which is the biological exposure index (BEI) of urine trichloroaxetic acid in Korea. Duration of work per day and duration of TCE- related work were significantly longer in the group of workers whose urine trichloroacetic acid concentration was over the criteria level of BEI. 3. TCE concentrations of three workshops were over the level of ACGIH TLV(threshold limit value), 50ppm in TWA (time -weighted average). In remaining one workshop, duration of TCE related works was only one hour per day. There was statistically significant correl-ation between the concentration of TCE in working environment and the proportion of workers in a workshop whose urinary trichloroacetic acid concentration was over the criteria level of BEI. 4. Responses to self-administered questionnaire were not meaningful for differentiation of psychoneurologica symptoms due to chronic TCE exposure from othres.

Park,Jong Sung

박종성,노영만,이광묵 가톨릭대학산업의학센타 산업의학연구소 1996 韓國의 産業醫學 Vol.35 No.4

Exposure of worker to ultraviolet irradiance during welding has not been studied previously in Korea, and there are no data concerning ultraviolet radiation exposure in welding. This study carried out to evaluate the exposure level of worker exposed to ultraviolet radiation. It was conducted during May, 1995-March, 1996 in 17 workplaces and 7 types of welding:2 ship relating manufacturing industries, 2 boiler and radiator manufacturing industries, 9 car repair shops, 3 metal industries, one machinery industry. The measurements of ultraviolet irradiation were carried out on the 7 types of welding equipment:MMA(manual metal welding), TIG(tungsten inert gas arcwelding), MIG(inert gas metal arc welding), W/D(aluminum welding), CO2(CO2 gas arc welding), plasma welding, and oxygen-acetylene cutting. Ultraviolet irradiances wete determined on 100 welding workers who had veen working at the each type of welding process. Also the irradiances were measured at inside of face shields and at the difference distances from the welding site. The effectiveness of the barrier in the workplace was evaluated. The obtained result as follows: 1. The mean irradiances were significantly different by type of welding, exceeding the ACGIH TLV. The measured highest irradiance was 322.349 ? W/cm? in MIG welding, showing 9.307 sec. as permissible duration in a day, The lowest was 25.776?W/cm? and 116.387 sec. in oxygen cutting. 2. According to the measurement at inside of the face shields, all of the face shield was effective, regardless of its type or color density. 3. Except the oxygen cutting process, exposure levels exceeded the ACGIH TLVin the zone within 5m from the welding work sites. At a distance 4m from the oxygen cutting, ultraviolet radiation was not detected, The barrier protection at welding process was effective. 4. In CO₂ gas welding, workers using the tool set with 120 and 25 volts were exposed to higher irradiance levels than those of the workers using the tool set with 100A and 21 volts.

전철주변의 소음 및 진동에 관한 조사 연구

김정만,이광묵 가톨릭대학산업의학센타 산업의학연구소 1982 韓國의 産業醫學 Vol.21 No.2

This study was designed to investigate the effects of the subway railroad noise and vibration on those who are living in the outskirts of Seoul including Seoulites from April 1 through the end of October, 1981. The 526 residents who live around the subway railroad were interviewed at 13 different areas from Seoul and the suburbs of Seoul. In each area, noise and vibration levels were measured at the distance of 10 meters from the subway railroad. All the information from the interviews and the physical measurements has been analysed to assess the effects of the subway railroad noise and vibration by inquiring the overall dissatisfaction of those who live in vicinity of subway railroad. The results were as follows: 1. General characteristics (1) 69.58% of the subjects were females and 30.42% of the subjects were from the 30~39 age group (2) 29.28% of the subjects were residents in apartments (3) 59.89% of the subjects residences have windows made up of wood (4) 57.79% of the subjects have been living in the suveyed areas for less than 3 years 2. Assessment of the subway railroad noise According to 7 grade assessments from not being at all annoyed as the discrimination of score 0 to being much annoyed as the discrimination of score 6, the average score on the subway railroad noise from which the subjects suffered was estimated as 5.12. 48.10% of the subjects were annoyed from the subway railroad noise in the early morning and on late night of the day and in regard to the season 52.28% were annoyed in summer and no difference was found between weekends and weekdays. For the solution of the subway railroad noise problem, 68.44% of the subjects requested to the authorities to control noises by installing soundproof equipments and speeding down the subway trains. 69.33% of the subjects were suffering from the interferences in their television or radio and conversation. The complaints were rapidly increasing for those exposed to the higher than 65 dB(A);86.02% complaind for those exposed to 70 dB(A) and 100% for those exposed to higher than 85 dB(A). According to the noise level, 30.42% of the subjects were exposed to the noise level of higher than 70 dB(A). 3. Assessment of the subway railroad vibration According to 5 grade assessments from not being at all affected as the discrimination of score 0 to being very often affected as discrimination of score 4, the average score on the interference in thinking, reading and studying was estimated as the highest score 1.87 and the complaints that things rattle or shake was estimated as 1.65. 45.06% of the subjects were annoyed in the early morning and on late night of the day and 55.81% were annoyed in the season of summer and no difference was found between weekends and weekdays. 4. Only 2.85% of the subjects presented their complaints to the competent authorities as to the subway railroad noise and vibration, although 63.69% of the subjects were suffering from the subway railroad noise and vibration.

모 연취급 사업장에서의 산업보건사업이 근로자 건강 증진에 미치는 효과

이병국,안규동,이광묵 가톨릭 대학 산업의학 쎈타 산업의학연구소 1987 韓國의 産業醫學 Vol.26 No.3

For the purpose of investigation the effect of occupational health service in terms of environmental control and health provision of workers on the improvement of worker's health, authors analysed the data of environmental measurement and health check-up of one lead using industry who started his investment to environmental improvement from 1980. Six hundred million won was invested for environmental improvement form 1980 to 1986. This in vestment brought about apparent improvement of workin g conditions of all of the workplaces from mean concentration of lead in air over 0.15mg/m₃in 1981 to mean concentration of lead in air less than 0.15mg/m₃. Environmental control reduced mean blood lead level from 51.2±11.5ug/di in 1983 to 39.2±16.0ug/dl in 1986, and delta-aminolevulinic acid concentration 3.15±2.1mg/l in 1982 to 1.96±1.7mg/l in 1986, respectively. Blood ZPP levels were decreased from 76.1±58.9ug/dl in 1983 to 42.23±30.3ug/dl in 1986. If 150ug/dl of blood ZPP is considered as unacceptable limit of lead intoxication, more than 10percent of workers belinged to this category in 1983, but only 0.5 of workers showed their blood ZPP level over the 150ug/dl in 1986. It was observed that no workers whose work duration were less than one year showed their blood ZPP level over 100ug/dl, but there were high percentages of lead workers with high blood ZPP(over 150ug/dl) who were working in uncontrolled had working condition and whose work duration were less than one year.