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박익렬,이동규 대한스포츠의학회 2003 대한스포츠의학회지 Vol.21 No.1
The purpose of this study was to investigate the correlation among the physical fitness factors in 6th grades elementary student. In a group of 534 healthy elementary school subject(composed of 283 male and 251 female). The student's physical fitness measurement consisted in 7 test items; muscular strength, muscular endurance, cardiorespiratory endurance, flexibility, muscle power, speed, % body fat. All data were analyzed by Correlation Analysis of SPSS/PC + 10.0, accepting level for all significances was above α=0.05. The results of this study were as follows: Male student group showed significantly differences muscular endurance, cardiorespiraory endurance, muscle power and speed than female student group, excepting flexibility in physical fitness factors. In the correlation among total physical fitness factors, there were a positive correlation between speed and cardiorespiratory endurance, speed and muscular endurance, but the correlation between % body fat and cardiorespiratory endurance, % body fat and speed, % body fat and muscular endurance was negative correlation. % Body Fat had an negative effect on physical fitness. Female student group showed lower correlation that male student group among the physical fitness factors.
엄영익,신혜련,우극현,안규동,이병국 순천향대학교 산업의학연구소 1997 순천향산업의학 Vol.3 No.1
To investigate the relationship of subjective symptoms of organic solvent exposed workers with their exposure level and urinary excretion of hippuric acid, 61 male workers who worked in 5 organic solvent using industries were studied. 89 workers were randomly selected from workers group for detailed health examination who visited hospital and had no exposure history to organic solvent as a control group. Personal air concentrations of organic solvent were checked for all organic solvent workers and urinary concentration of hippuric acid for both exposed and control group were also measured. Subjective symptom questionnaire of 31 organic solvent related item were provided to all workers and filled up by themselves and rechecked by medical doctor. The results obtained were as follows: 1. The overall prevalence rate of symptoms were significantly higher in exposed group than control group with statistical difference of 13 symptoms. 2. The overall prevalence rate of symptoms seemed to be increased by the exposure level of organic solvent. 3. The excretion of hippuric acid was more closely related to the level of toluene exposure than the level of mixed organic solvent exposure. 4. In the analysis of multiple stepwise regression using hippuric acid concentration as dependent variable and the concentration of each organic solvents as independent variables, only toluene had significant relationship with hippuric acid and none of other solvent did not affect on the concentration of hippuric acid. 5. In the analysis of multiple stepwise regression using symptom prevalence as dependent variable and the concentration of each organic solvents as independent variables, toluene had most significant effect to the symptom prevalence and the contribution of other solvents was minimal.
Adriamycin및 Epiadriamycin투여가 Mouse심장근의 Mg++-ATPase활성에 미치는 영향에 관한연구
권익승,이군자,정호삼,이규식 한양대학교 의과대학 1988 한양의대 학술지 Vol.8 No.2
Adriamycin and epiadriamycin are anthracyclin antibiotics and epiadriamycin has a different configuration of the -OH group in in the C-4 positive (equatorial configuration) of the aminosugar moiety of the adriamycin. The antibiotics inhibit the DNA synthesis by intercalating between strands of the DNA double helix and they have been widely used as anticancer drugs in the treatment of sarcoma, leukemia, and solid tumor. Adriamycin and epiadriamycin have little specificity toward the normal and tumor cells, cytotoxicity of the normal cells being observed during the drug therapy. Therefore the author undertook the present study to pursue the effect of adriamycin and epiadriamycin on mitochondria of the cardiac muscle cell. Albino mice, ICR strain, weighing 20gm were used as an experimental animals. The experimental animals were killed 12, 24, 48 and 72 hours after administration of 30mg/kg of adriamycin and 36mg/kg of epiadriamycin, respectively. The specimens obtained from left ventricle of the heart were prepared and processed by Wachstein's method for detecting ??-ATPase activity in the mitochondria. The results obtained were as follows: 1. The ??-ATPase activity in left ventricular cardiac muscle cells was strongly positive in the 12-hour adriamycin treated group and decreased with time, exhibiting only trace activity in the 72-hour adriamycin treated group. 2. The ??-ATPase activity in left ventricular cardiac muscle cells was strongly positive in the 12-hour epiadriamycine treated group and weakly positive in the 72-hour epiadriamycin treated group. Consequently it is suggested that adriamycin and epiadriamycin inhibit ??-ATPase activity showing cardiotoxic effect of the drug.
飼料資源開發을 위한 雜灌木樹葉의 飼料價値와 韓牛의 放牧利用에 關한 硏究
尹益錫,陸完芳,李仁德,曺圭燉,金炯基 건국대학교 1978 學術誌 Vol.22 No.1
As a part of forestry utilization for livestock feed resources the feeding value ague of shrub leaf by growth stage and grazing behabiour of the native cattle at shrubby grassland in function of seasons were investigated and the following results were obtained. 1. The crude protein content of oak leaf declined as the growth stage increased whereas the contents of crude fiber and crude fat showed the opposite tendency. 2. The intake of oak leaf paralleled with the amount given while the intake of the mixed grass leas remarkable increased and the body weight gain was also remarkably increased. 3. The average number of oak leaf intake was 70.5 times for spring, 148.7 for summer, and 395.7 for autumn. 4. The grazing time by the native cattle was decreased in the order of spring, autumn, and summer. As for the grazing behaviour, the intake activity was most active during morning, mid-day and late afternoon or three times a day. 5. The duration of rumination was found to be in the decreasing order or summer, autumn and spring, cattles ruminated more when the grasses were more abundant. 6. As for the inactive period of animal, it was short during spring when the animals spent more time for eating but it was about 5 times longer during both summer and autumn.
직업적 연폭로가 일부 신경행동학적 검사수행에 미치는 영향
안익수,안현철,김용배,리갑수,김화성,황규윤,최은,장봉기,이성수,안규동,이병국 순천향대학교 산업의학연구소 1999 순천향산업의학 Vol.5 No.1
In order to investigate that blood lead levels of lead exposed workers is associated with decreased performance in neurobehavioral tests in adults, we investigate 78 workers in a battery industry. Three items among neurobehavioral core test battery of World Health Organization, including digit span, Santa ana dexterity, digit symbol were administered to workers occupationally lead exposed workers by operational guide for the WHO neurobehavioral core test battery. Blood lead (PbB) and zinc protoporphyrin in whole blood (ZZP) were selected as an index of lead exposure. Detailed occupational history such as exposed agent, age, work duration, smoking and drinking habits, were recorded as confounding factors. After controlling age, the results of digit span and digit symbol among the neurobehavioral tests were significant contributed by PbB.
宋奎翼 경북대학교 공과대학 1982 工大硏究誌 Vol.11 No.-
Servoed modulation slope FM/CW radio altimeter system performances, loop time constant and doppler shift compensation, are analyzed. The loop time constant has very low value which can be neglected. The doppler shift compensation is achieved in the output circuit of the period-to-voltage converter by sampling process.