Urinary Levels of Arsenic, Cadmium, and Zinc of Children in Ulsan Industrial Area / 예방의학회지

OBJECTIVES: We conducted this study to obtain basic data of urinary levels of arsenic, cadmium, and zinc in children of Ulsan industrial area and to evaluate the difference in urinary levels of these metals between industrial area and suburban area. METHODS: The study subjects were composed of 348(male 182, female 166) school children residing in industrial area and 100(male 50, female 50) school children of suburban area. We analyzed urinary levels of arsenic, cadmium, and zinc using atomic absorption spectrophotometer. RESULTS: The geometric means of urinary levels of arsenic, cadmium, and zinc of study participants were 3.69, 0.99, 282.49 microgram/L respectively. The adjusted geometric means of urinary levels of arsenic, cadmium, and zinc of study participants were 3.92, 1.05, 299.92 microgram/g creatinine respectively. CONCLUSIONS: The children residing in industrial area had the higher urinary levels of arsenic and cadmium than suburban children with statistical significance(p<0.01).

Nasal Septum Perforation of Welders / 대한산업의학회지

Six cases of nasal septum perforation were found among welders during periodic physical checkup in 1997. Considering the size, shape and margin, the perforations were assumed to have been occurred several years before of which the diameter were 8~15 mm. To investigate the cause of perforation, we reviewed the past history of preemployment, the results of annual working environment survey and the material safety data sheets of welding rods and steels with which they have dealt, and analyzed the concentration of several metals of welding fume and the concentration of blood and urinary chromium. In the result, we presupposed that the nasal septum perforations of welders were due to chronic exposure to low level hexavalent chromium and/or nickel, and report these cases with literatures review.

Type of Anemia Due to Organic Solvents / 대한산업의학회지

The purpose of this study Is whether we can presuppose the correlation between some type of anemia and exposure to organic solvents using some hematologic index such as MCV, RDW and MCHC. The authors conducted the hematological examination of 160 male workers who were exposed organic solvents and those of 167 control workers. The type of anemia was slightly macrocytic anemia, and the RDW was generally homogenous in workers exposed to organic solvents whereas those of control were normocytic and homogenous.

A Study on the Size of Dust in Workplaces of a Shipyard / 예방의학회지

To obtain the basic information that can be used as a factor for explaining the diversity of welders' pneumoconiosis, the authors measured the concentrations of dust according to the size of dust in 71 workplaces of a shipyard where welders' pneumoconiosis have occurred. The concentrations of dust according to the size of dust showed no difference between workplaces regardless of kinds of work.

A Study on the Hematologic Changes of Workers Exposed to Mixed Organic Solvents / 대한산업의학회지

The purpose of this study is to evaluate the hematological changes of workers exposed to mixed organic solvents and to search the organic solvent that bring out these changes. The study participants were 1,605 workers, consisting 1,088 workers (male 989, female 99) exposed to mixed organic solvents and 517 non-exposed workers (male 431, female 86). The authors analyzed the results of complete blood count and differential count of leukocytes of all the workers and examined all of the material safety data sheets of substances with which they dealt and the results of their working environmental surveys during the last 3 years. The results were as follows: 1. The mean values of complete blood count in workers exposed to mixed organic solvents were lower than that of non-exposed workers in WBC, RBC, hemoglobin and hematocrit in cases of male and RBC, hemoglobin and hematocrit in cases of female, but the mean value of platelet count in male exposed workers and WBC count in female exposed workers were higher than those of non-exposed workers. 2. The distribution of differential count of leukocytes showed no difference between exposed workers and non-exposed workers. 3. The correlation coefficients between age and duration of employment and WBC showed statistically a positive value and that between age and duration of employment and RBC, hemoglobin, hematocrit showed a statistically negative value in cases of male exposed to mixed organic solvents. But in cases of female there was no statistical correlation between them. 4. In cases of male the proportions of workers with subnormal levels of WBC, RBC, hemoglobin, hematocrit and platelet according to the standard of classification were high or than those of non-exposed workers. The proportions of exposed workers were 3.6 %, 18.6 %, 5.3 %, 32.7 % and 1.4 % respectively and those of non-exposes workers were 2.8 %, 10.7 %, 2.1 %, 13.9 % and 0.2 % respectively. 5. In cased of female the proportion of workers with subnormal levels of RBC, hemoglobin and hematocrit according to the standard of classification were higher than those of non exposed workers. The proportion of exposed workers were 42.4 %, 55.6 % and 41.4 % respectively and those of non-exposed workers were 10.5 %, 11.6 % and 8.1 % respectively. 6. The number of substances with which workers exposed to mixed organic solvents dealt were about 500, and 22 organic solvents such as xylene, toluene, isopropyl alcohol, 2-ethoxyethanol and 2-ethoxy ethyl acetate were main components of substances according to the material safety data sheet and working environmental surveys during the last 3 years. The authors suspect 2-ethoxyethanol and 2-ethoxy ethyl acetate of the organic solvents, which bring out the hematological changes of workers exposed to mixed organic solvents. As a result of this study, the authors confirmed the hematological changes of workers exposed to mixed organic solvents and recommend : strict management of working environment, working time and the protective equipments of workers exposed to mixed organic solvents.

A Study on the Hematologic Changes of Workers Exposed to Mixed Organic Solvents / 대한산업의학회지

The purpose of this study is to evaluate the hematological changes of workers exposed to mixed organic solvents and to search the organic solvent that bring out these changes. The study participants were 1,605 workers, consisting 1,088 workers (male 989, female 99) exposed to mixed organic solvents and 517 non-exposed workers (male 431, female 86). The authors analyzed the results of complete blood count and differential count of leukocytes of all the workers and examined all of the material safety data sheets of substances with which they dealt and the results of their working environmental surveys during the last 3 years. The results were as follows: 1. The mean values of complete blood count in workers exposed to mixed organic solvents were lower than that of non-exposed workers in WBC, RBC, hemoglobin and hematocrit in cases of male and RBC, hemoglobin and hematocrit in cases of female, but the mean value of platelet count in male exposed workers and WBC count in female exposed workers were higher than those of non-exposed workers. 2. The distribution of differential count of leukocytes showed no difference between exposed workers and non-exposed workers. 3. The correlation coefficients between age and duration of employment and WBC showed statistically a positive value and that between age and duration of employment and RBC, hemoglobin, hematocrit showed a statistically negative value in cases of male exposed to mixed organic solvents. But in cases of female there was no statistical correlation between them. 4. In cases of male the proportions of workers with subnormal levels of WBC, RBC, hemoglobin, hematocrit and platelet according to the standard of classification were high or than those of non-exposed workers. The proportions of exposed workers were 3.6 %, 18.6 %, 5.3 %, 32.7 % and 1.4 % respectively and those of non-exposes workers were 2.8 %, 10.7 %, 2.1 %, 13.9 % and 0.2 % respectively. 5. In cased of female the proportion of workers with subnormal levels of RBC, hemoglobin and hematocrit according to the standard of classification were higher than those of non exposed workers. The proportion of exposed workers were 42.4 %, 55.6 % and 41.4 % respectively and those of non-exposed workers were 10.5 %, 11.6 % and 8.1 % respectively. 6. The number of substances with which workers exposed to mixed organic solvents dealt were about 500, and 22 organic solvents such as xylene, toluene, isopropyl alcohol, 2-ethoxyethanol and 2-ethoxy ethyl acetate were main components of substances according to the material safety data sheet and working environmental surveys during the last 3 years. The authors suspect 2-ethoxyethanol and 2-ethoxy ethyl acetate of the organic solvents, which bring out the hematological changes of workers exposed to mixed organic solvents. As a result of this study, the authors confirmed the hematological changes of workers exposed to mixed organic solvents and recommend : strict management of working environment, working time and the protective equipments of workers exposed to mixed organic solvents.

Alterations of immune response in workers occupationally exposed tolead / 대한산업의학회지

No abstract available.

A Study on the Urinary Metabolites and Sister Chromatid Exchanges of Peripheral Lymphocytes in Workers Exposed to the Organic Solvents / 대한산업의학회지

In order to know the possibility of utilizing the sister chromatid exchanges as an index which could evaliiate the effect of organic solvents on Lhe health in industrial workers, the authors Studied the effects of the inductivity of sister chromatid exchanges in peripheral lymphocyces from 90 female workers espoxed to organic solvents .and 20 lion-exposed female workers. The results obtained were as follows: 1. The frequency of sister chromatid exchanges in peripheral iympnocytes from 90 female workers exposed to organic solvents was significantly increased in comparison with 20 coatiol subiect. 2. The frequency of sister chromatid exchanges was significantly Increased in the workers who were employed in the manufacture of plastic materials than the other manufactures. 3. There were no significant differences in the frequency of sister chrornatid exchanges by carriera of the exposed workers. 4. The correlation between the frequency of sister chromatid exchanges and urinary hippuric acid was significant with the coefficient of 0.5902 showing Y=1.867X+15.188 in which Y indicate the frequency of sister chromatid exchanges per cell and X indicate the urinary hippuric acid concentration by g/l.