- Hematologic Findings and Urinarysis of Workers Exposed to Mixed Organic Solvents.
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K W Jeong, D H Kim, S H Ohm, S J Kim, J H Kim, S S Moon, J H Chun, Y W Kim
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Korean J Prev Med. 1991;24(3):314-337.
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- To evaluate the effects on health by exposure to mixed organic solvents, the author analyzed some labortory findings of blood(hemoglobin, hematocrit, RBC, WBC, SGOT, SGPT) and urine(protein, blood, sugar) that were obtained from 722 workers (male: 446, female: 276) who worked in plywood, painting and shoes factories in Pusan area from January to December, 1990. The result were as follows; 1. The mean values of each hematologic finding were all within normal limit but there were significant differences at hematocrit, RBC, WBC, SGOT, in male and at WBC, SGPT in female at the comparison of the mean values and the distribution according to the normal criteria by type of work. 2. There were no differences in urinalysis (protein, blood, sugar) by type of work. 3. In stepwise multiple regression, analysis of hematologic findings on age, working duration and type of work, regression coefficients on age and type of work were relatively high in male and female subject, respectively. As a result of this study, it is considered that the measurement of WBC with morphology is significant in hematologic findings and instead of spot urine and urinstix, 24 hours urine and quantitative analysis is required in urinalysis in screening test for healthy status of workers who deal with the organic solvents.
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Summary
- A Study on the Level of Air Pollution and Noise in Pusan Area.
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G L Cho, D H Moon, J Lee, H R Sin, Y W Kim, H J Park, K T Pae
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Korean J Prev Med. 1990;23(4):391-403.
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- In order to assess the degree of atomospheric pollution and noise and to contribute the health improvement of residents in Pusan, the author measured the levels of CO, SO2, NO2, TSP, HCHO and noise in 8 areas(industrial, residential and park areas) from January to March in 1990. The results were as follows: 1. Sasang industrial area was significantly higher (2.85 +/- 0.84ppm) in the average concentration of CO than other areas. However, there no areas to affect the human body in terms of CO concentration. 2. In general, industrial area was significantly higher (0.134 +/- 0.084ppm) in the average concentration of SO2, than other areas, and it was the lowest (0.009 +/- 0.005ppm) in the Namchon-dong area. 3. Industrial (0.033 +/- 0.009ppm) and residential area (0.029 +/- 0.004ppm) were significantly higher in the average concentration of NO2 than Park area (0.009 +/-0.001ppm). However, there were no areas to affect the human body in terms of NO2 concentration. 4. Sasang industrial area was the highest (580.4 +/- 415.26 microgram/m3) at the average concentration of TSP and Hae-Un Dae area was the lowest (97.22 +/- 37.86 microgram/m3). But TSP concentration showed the level to affect the human body in most areas. 5. Industrial area was significantly higher (2.25 +/-1.15ppb) in the average concentration of HCHO than residential (1.13 +/- 0.25ppb) and park area (1.33 +/- 0.20ppb). 6. Industrial area was significantly higher (77.28 +/- 6.92dB(A)) in the level of noise than residential (65.77 +/- 3.76dB(A)) and park area (64.65 +/- 5.25dB(A)). In comparison with regional Standard Noise Level, however, the average noise level of residential and park area was higher than that of the Standard. In general, the level of pollution of industrial complex areas was relatively higher than those of residential and park areas. Among the industrial areas, sasang area was worst in most items. Both SO2, and TSP showed the level to affect the human body in most of studied areas. It is necessary to install a new Air Quality Standard for HCHO to screen our environmental pollution.
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Summary
- Chest Radiological Changes after Cessation and Decrease of Exposure to Welding Fume in Shipyard Welders.
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H S Sohn, J T Lee, H R Shin, C U Lee, K T Pae, H J Park, Y W Kim
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Korean J Prev Med. 1989;22(3):328-336.
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- 27 shipyard welders were diagnosed as pneumoconiosis and suspected pneumoconiosis(1976 - 1988) by chest radiographs and were observed over three years. 27 welders were divided into three groups by the state of exposure to welding fume i.e. cessation, decrease or continuity of exposure. And we observed the changing pattern of the chest radiographs of 27 welders with the passage of time. The results were as follows; 1. Group I (ceased exposure to welding fume) were 10 cases: suspected pneumoconiosis, 7 cases: pneumoconiosis). Chest radiographs of all cases were improved. The shape and size of small opacities was improved in 6 cases(85.7%) and did not changed in 1 case(14.3%) out of 7 pneumoconiosis welders. 2. Group II (decreased exposure to welding fume) were 5 cases(2 cases: suspected pneumoconiosis, 3 cases: pneumoconiosis). Chest radiographs were progressed in 2 cases(40%), did not changed in 1 case(20%), were improved in 2 cases(40%) out of 5 cases. The shaped and size of small opacities was progressed in 1 case(33.3%) and was improved in 2 cases(66.7%) out of 3 pneumoconiosis welders. 3. Group III (continued exposure to welding fume) were 12 cases(1 case: suspected pneumoconiosis, 11 cases: pneumoconiosis). Chest radiographs were progressed in 9 cases(75%), did not changed in 3 cases(25%) out of 12 cases. The shape and size opacities was progressed in 1 case(9.1%) and did not changed in 10 cases(90.9%) out of 11 pneumoconiosis welders. 4. The average duration for development into suspected pneumoconiosis was 6.6 years and for progression of each one category after that was 2.2 years(p<0.01). The radiological appearance of pneumoconiosis had disappeared or decreased after cessation of exposure to the welding fume. So that, early detection and control e.g., change of department of pneumoconiosis of welders by screening program will be important for medical surveillance of welders.
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Summary
- The Epidemiologial Study on the Welders' Pneumoconiosis among Shipyard Welders in Pusan Area.
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C U Lee, G Y Cho, S C Kim, K T Pae, Y W Kim, I G Yun
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Korean J Prev Med. 1989;22(1):153-161.
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- Authors studied on the prevalence of 94 cases of pneumoconiosis who were found out through the screening test on 1,062 workers engaged in welding process at 36 shipyard in Pusan area from March 1st, 1986 to November 30th, 1986. The result were as follows; 1. Dust concentration was measured 4.49+/-0.54 mg/m3 in the small scale shipyard while it was 6.25+/-1.08 mg/m3 in the large one. 2. The prevalence of welder's lung was 8.9% (male:8.5%, female:12.0%) and this is consist of 4.9% suspected pneumoconiosis and 4.0% pneumoconiosis more than category 1/0. 3. The prevalence was significantly increased according to the duration of dust exposure (p<0.05), and it showed the increasing tendency by the age group. 4. The prevalence was significantly higher in the large scale shipyard than is the small scale one(p<0.01). 5. The type and shape of opacities were 71.4% of p type and 28.6% of q type, however no pneumoconiosis with r type observed in this study. 6. The main subjective symptoms were the sputum(29.8%), coughing(25.5%), shortness of breath(20.2%), fatigue(6.4%), and chest pain(5.3%). In other hand, 57.4% of pneumoconiosis were asymptomatic. 7. The prevalence of pulmonary tuberculosis was radiologically 1.7% in all subjects including 5.3% in pneumoconiosis and 1.3% in no pneumoconiosis(p<0.01).
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Summary
- A study on the properities of the paralytic shellfish poison.
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J T Lee, H S Shon, D H Moon, C U Lee, S C Kim, K T Pae, J Y Kim, Y W Kim, N W Paik
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Korean J Prev Med. 1988;21(1):163-171.
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- The paralytic shellfish poisoning was occurred among 25 laborers who worked at breaking-up of ships in Pusan for 5 days from March 29 to April 2 of 1986. For the purpose of accurately defining the paralytic shellfish poison(PSP), the authors carried out mouse bioassay and chemical analysis. The results were summarized as follows: 1. The mean amount of paralytic shellfish toxin was 1,207.8 microgram per 100gm meat, and the mean death time of mouse was 5 minutes 16 second. 2. The properties of the PSP were mainly gonyautoxin group by chemical analysis(TLC, IR, 1H-NMR).
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Summary
- Survey on Ambient Air Quality in Pusan Areas.
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Y W Kim, J Y Kim, J H Lee, D H Moon, H R Shin, J T Lee, M C Lee
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Korean J Prev Med. 1986;19(2):252-262.
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- In order to assess the degree of atmospheric pollution and to contribute the health improvement of residents in Pusan, the authors measured CO, SO2, NO2 and TSP level at 3 places by season and time from July, 1985 to April, 1986. The places were S my n, Sasang and Daeshin-dong, which were known as the commercial, industrial and residental area in Pusan, respectively. The Obtained results were as follows: 1) The average concentration of CO was highest with 2.19+/-0.52(3.5-1.0)ppm at Sasang area, and lowest with 1.32+/-0.55(3.0-0.5)ppm at Daeshin-dong areas. 2) The average concentration of SO2 was highest with 0.092+/-0.073(0.378-0.028)ppm at Sasang, and lowest with 0.041/-0.014(0.083-0.019)ppm at Daeshin-dong. 3) The average concentration of NO2 was highest with 0.069+/-0.012(0.090-0.050)ppm at Somyon, and lowest with 0.043+/-0.010(0.061-0.032)ppm at Daeshin-dong. 4) The average concentration of TSP was highest with 300+/-130(780-130) microgram/m3 at Sasang, and lowest with 160+/-80(390-70) microgram/m3 at Daeshin-dong. 5) The level of CO and TSP were highest in summer at Somyon and Daeshin-dong, and in winter at Sasang, respectively. The level of SO2 and NO2 were highest in winter and spring at all areas. 6) The level of all air pollutants were highest in the afternoon or night than in the morning.
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Summary
- A Study on the Status of Working Environment of Some Rubber and Chemical Products Manufacturing Industries in Busan.
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J Y Kim, C U Lee, K T Pea, J H Kim, J O Kim, D K Kim, Y W Kim
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Korean J Prev Med. 1981;14(1):97-110.
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- This study was conducted in order to investigate the status of harmful working environment on twelve rubber and ten chemical products manufacturing industries in Busan area over a period of five months from June 1 to October 31, 1980. The summarized results were as follows; 1. The highest and lowest mean values of harmful environmental elements in workroom of rubber products manufacturing industries were noted in twisting (98.7dB) and coating department (77.3dB) to noise, molding (6.43mg/m3) and forming (1.33mg/m3) to dust, bonding (toluene 463.7ppm, xylene 83.3ppm and benzene 6.7ppm, respectively) to organic solvents respectively. Also in chemical products manufacturing, they were noted in grinding (95.1dB) and shining department (76.8dB) to noise, packing (4.30mg/m3) and staining (3.20mg/m3) to dust, shining (393.3ppm and 375.0ppm, respectively) and varnishing(125.5ppm and 121.7ppm, respectively) to toluene and xylene, and scattering (51.8ppm) and mixing (23.9ppm) to benzene, respectively. 2. The mean values of harmful elements in workroom of rubber products manufacturing were 86.3dB to noise, 4.16mg/m3 to dust, 258.2ppm to toluene, 230.3ppm to xylene, and 54.0ppm to benzene, respectively. Also in chemical products manufacturing, they were 85.2dB to noise, 3.69mg/m3 to dust, 227.9ppm to toluene, 213.2 ppm to xylene, and 36.3ppm to benzene, respectively. 3. Number of workers exposed to harmful working environment, over TLV, of a total 10,195 workers in rubber manufacturing were 1,002(9.8%) to noise, 212(2.1%) to dust, 1,581(15.5%) to tolune, 1,509(14.8%) to xylene, and 1,524(15.0%) to benzene, respectively. Number of workers exposed to harmful working environment, over TLV, of a 1,913 workers in chemical products manufacturing were 112(5.9%) to noise, 132(6.9%) to each organic solvent, respectively. 4. The values of noise and dust of rubber and chemical products manufacturing in 1980 were lower then those in 1977, but the value of organic solvent in 1980 was with that in 1977.
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KSPM
