• Korean Journal of Animal Reproduction
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• v.26 no.1
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• pp.53-59
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• 2002

This study were performed to investigate the effect of magnetic field exposure on semen characteristic and the weights of body, reproductive organs and liver, kidney and spleen in mice. In magnetic field exposure for 15 days, sperm concentrations and viability were significantly lower in magnetic field(15.7$\times$10$^{6}$ $m\ell$, 29.3%) than that in control group(25.1$\times$10$^{6}$ $m\ell$, 34.4%)(P＜0.05). The proportion of sperm abnormality were significantly increased in magnetic field exposure groups for 15 days than that in control group(P＜0.05). The exposure of magnetic field in mice didn't affect the body and reproductive organ weight such as testis, epididymis, vasicular gland and coagulatin gland. The weight in liver and kidney were not affect in magnetic field exposure groups. However, the spleen weight were significantly higher(P＜0.05) in group exposed with than without magnetic field. This studies indicate the short or long term magnetic field exposure in mice were noxious effects on the sperm characteristics and spleen weight, but didn't affect body, reproductive organs, and liver and kidney weight.

• The Research Journal of the Costume Culture
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• v.12 no.5
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• pp.721-736
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• 2004

The aim of this study is to clarify aesthetic values and sociocultural meanings that reappears in contemporary fashion. In order to analyze aesthetic values and symbolic meanings of body decoration, I examined the concepts and expression methods of the body decoration. Also, analyzed external characteristics of expression and its internal meanings that applied in modern fashion. The expressions of body decoration represented in contemporary fashion are classified into direct and indirect methods. The direct method is expressed by tattoos, piercing, henna, make-up and body painting. And, indirect method is expressed by see-through look, body-conscious look and accessories that were utilized its patterns and the material adaptation methods. Such expression of body decoration in the modern fashion was represented into grotesque images and erotic images. The characteristics of grotesque images are abnormal state, hateful animal image and distorted or transformed body and the internal meanings are the pursuit of primitive, exoticism, the pursuit of playfulness, and resistance. The characteristics of erotic images are an exposure of body, see through, body-conscious and androgynous look and the internal meanings are the self-intoxication, naturalism and sexual pleasure.

• Journal of Korean Society of Occupational and Environmental Hygiene
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• v.20 no.1
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• pp.70-78
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• 2010

The purpose of this study is to investigate the appropriate metabolite as biomarker for the biomonitoring of 1,3-butadiene(BD) inhalation exposure. We measured the hemoglobin adducts which were extracted from the blood of the ICR mice inhalation exposure with 100ppm and 500ppm 1,3-butadiene for 2 weeks(5 hr/day ${\times}$ 5 days/week). Hemoglobin adducts were the (N-2-hydroxy-3 -butenyl) valine (HB Val) and (N-2,3,4-trihydroxy-butyl)valine (THB Val). Body weights of the exposure groups were significantly lower from 11 exposure post-day in 100ppm BD inhalation mice and from 7 exposure post-day in 500ppm BD inhalation mice than in control. The levels of HB Val are 0.8~1.7pmol/mg globin for 100ppm BD inhalation exposure, and 2.1~4.4 pmol/mg globin for 500ppm BD inhalation exposure. The levels of THB Val are 15.0~22.0 pmol/mg globin in 100ppm BD inhalation exposure, and 34.8~45.7 pmol/mg globin for 500ppm BD inhalation exposure. So the levels of THB Val and HB Val are proportional relationship with BD exposure level. THB Val is 12.9~18.8 times higher level that HB Val in 100ppm BD exposure group and 10.4~16.6 times higher level than HB Val in 500ppm BD exposure group. We concluded that THB Val is an appropriate metabolite as biomarker for the biomonitoring for BD inhalation exposure.

• The Research Journal of the Costume Culture
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• v.20 no.6
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• pp.854-868
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• 2012

The purposes of this study were to investigate the effects of clothing values, self-perceived physical attractiveness on sensuous clothing behavior(see-through, body emphasis, body exposure, skinny), and also to figure out if any causal relationships existed among variables and whether demographic variables affected these relationships. For data collection, a questionnaire was administrated to 500 female college students in Gwangju City, Korea. The results were summarized as follows. First, clothing values were divided into six factors: religious clothing value, political clothing value, exploratory clothing value, social clothing value, economic clothing value, aesthetic clothing value. Sensuous clothing behaviors were divided into four factors: see-through, body emphasis, body exposure, skinny. Overall clothing values had positive effects on sensuous clothing behaviors. Second, self-perceived physical attractiveness turned out to have significant effects on overall sensuous clothing behaviors. Third, clothing values turned out to have significant effects on overall self-perceived physical attractiveness. This study confirmed that clothing values and self-perceived physical attractiveness turned out to have significant effects on sensuous clothing behavior.

• The Research Journal of the Costume Culture
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• v.14 no.6
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• pp.1042-1055
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• 2006

The purpose of this study is to consider the formative characteristics of dance sports from such points of view as shapes, colors, material and decorations, and to examine artistic characteristics that are expressed through those elements. As a result, this study shows five artistic characteristics as follows; First, rhythmic characteristic is expressed with repeat of lines that is formed by pleats, shirring or gather, with duplication of ruffle's wave, with gradation of colors, with Moire-effect that is generated with overlap of see-through material, with glossy material that reflects lights to a great extent, with fringe. Second, bodily characteristic emphasizes the beauty of human bodies through direct or indirect body exposure by way of cut-and-open, see-throughness or close adhesion. Third, decorative characteristic is shown with beads, fringe, ruffle, embroidery, shirring, binding, or feather. Fourth, the beauty of female body is manifested to express eroticism, which is culminated by body exposure, body consciousness, use of illuminating or see-through material or colorful trimming. Finally, elegant characteristic is revealed through feminity, sophistication, and harmony that are expressed with black and white colors, see-through material, or bead trimmings.

• Journal of Korean Society of Occupational and Environmental Hygiene
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• v.24 no.3
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• pp.321-329
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• 2014

Objectives: This study was performed to produce data on the pulmonary toxicity of neodymium oxide($Nd_2O_3$) by intratracheal instillation. Methods: Two groups of rats were exposed to neodymium oxide by intratracheal instillation with doses of 0.5 mg and 2.0 mg, respectively. At two days, four weeks and 12 weeks after exposure, body weight change, organ weight change and histopathological change were observed. At 12 weeks after exposure, lung function change was measured. Results: The body weight of rats in the high concentration group decreased after 12 weeks by 4-5% compared with the control group. At four weeks and 12 weeks after the administration of neodymium oxide, the absolute weight of the lungs of the high concentration group were significantly increased when compared with the control group(p<0.05). At 12 weeks after the injection of neodymium oxide, breath frequency and respiratory minute volume were increased, but inhalation time and expiratory time were decreased. Bronchiolar epithelial hyperplasia, alveolar type II cell hypertrophy/hyperplasia and foreign body granulomatous inflammation were observed in the high exposure group. Conclusions: Body weight decrease, lung absolute weight and breath frequency increase, and pathological lung change were all observed. We found that pulmonary toxicity of neodymium oxide nanoparticles by intratracheal instillation could be confirmed.

• Development and Reproduction
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• v.19 no.2
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• pp.69-77
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• 2015

Cell-cell direct communication through channel-forming molecules, connexin (Cx), is essential for a tissue to exchange signaling molecules between neighboring cells and establish unique functional characteristics during postnatal development. The corpus epididymis is a well-known androgen-responsive tissue and involves in proper sperm maturation. In the present research, it was attempted to determine if expression of Cx isoforms in the corpus epididymis in the adult is modulated by exposure to estrogenic or anti-androgenic compound during the early postnatal period. The neonatal male rats at 7 days of age were subcutaneously injected by estradiol benzoate (EB) at low-dose ($0.015{\mu}g/kg$ body weight) or high-dose ($1.5{\mu}g/kg$ body weight) or flutamide (Flu) at low-dose ($500{\mu}g/kg$ body weight) or high-dose (50 mg/kg body weight). The corpus epididymis collected at 4 months of age was subjected to evaluate expressional changes of Cx isoforms by quantitative real-time PCR. Treatment of low-dose EB resulted in increases of Cx32, Cx37, and Cx45 transcript levels, while exposure to high-dose EB decreased expression of Cx26, Cx30.3, Cx31, Cx31.1, Cx32, Cx40, Cx43, and Cx45. Treatments of Flu caused significant decreases of expression of all examined Cx isoforms, except Cx37 and Cx43 shown no expressional change with high-dose Flu treatment. These findings imply that expression of most Cx isoforms present in the corpus epididymis would be transcriptionally regulated by actions of androgen and/or estrogen during postnatal period.

• Journal of the Korean Society of Radiology
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• v.12 no.5
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• pp.565-573
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• 2018

Cyclotron for medical purposes generates nuclear reaction by accelerating protons in high speed, in order to produce radiopharmaceuticals, and unnecessary neutrons are generated through such nuclear reaction. Neutrons cause activation in the parts of cyclotron which then cause exposure to radiation for people working in the field. This study, in that regard, aims to analyze exposure level by finding out the degree of activation of aluminum body, silver body, and havar foil which are the parts of Targetry where the nuclear reaction takes place. The results of the experiment showed that aluminum body and silver body had no problems re-using them as the energy and half-life of activated nuclides were small and short, making the affect on the people working in the field extremely low. However for havar foil, its activated nuclides had a high level of energy which resulted in high level of affect to the people working in the field. The activation factors of the cyclotron were analyzed, and the results showed that the Havar foil was activated the most among the targetry parts, and greatly exposed workers due to regular replacement, and needed special management as radioactive waste.

• Journal of Environmental Health Sciences
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• v.40 no.1
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• pp.17-26
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• 2014

Background: Despite children's unique characteristics that distinguish them from adults, relatively few attempts have been made to measure exposure factors for characterization of children's exposure to hazardous chemicals in child-specific products (CSP). This study was conducted to establish the child-specific exposure factors for exposure and risk assessment of hazardous substances in CSP. Methods: We investigated the exposure factors (e.g., time use of child-products, time and frequency of object-to-body contact, time and frequency of object-to-mouth contact) influencing children's exposure to CSP (e.g., toys, playmats, oil pastels, etc.) in 650 children through a parent-completed questionnaire using a web-based survey. Participants were recruited in five age groups, <1, 1-2, 2-3, 3-6, and 6-12 years of age. Results: The child-specific exposure factors were presented as the mean, median, $95^{th}$ percentile, minimum, and maximum values. Time activity for play mats was the longest among CSP and infants spent more time on them than did elder age groups (189.3-224.7 min/day for <1-2 years vs. 91.2 min/day for 6-12 years). It is apparent that time and frequency of toy block- and plastic toy-to-mouth contact significantly decreased as a function of age. When the variation of CSP use patterns was compared by gender, the only variable that was statistically different between genders was time activity in child-products exposure space. Conclusion: We believe the five child-specific exposure factors suggested in the present study will be valuable for reducing uncertainty in the estimation of chemical exposure during risk assessment of CSP and furthermore, in the appropriate regulations to protect children's health.

• Toxicological Research
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• v.21 no.4
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• pp.297-301
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• 2005

Farmers are generally expressed to pesticides through mixing loding, application activity and harvesting of crop after application of pesticides. The present work investigated the exposure and risk of furathiocarb to workers when harvesting of cucumber was carried out in green house after application of furathiocarb EC. Glove was used for the hand exposure assessment, socks for foot and dermal patches for the other parts of body. Personal air monitor equipped with a XAD-2 resin was used for the respiratory exposure assessment. During the harvest of cucumber in green house, the initial rate of potential dermal exposure (Day 1) for methidathion was 1.3 mg/hr. The major exposure parts were hand $(78\~83\%),\;thigh\;(5\~7\%)$ and arms $(6\~9\%)$ during 3 days' harvest. No exposure was detected from the respiratory monitoring. For risk assessment, the potential dermal exposure (PDE), the absorbable quantity of exposure (AQE) and the margin of safety (MOS) and margin of exposure (MOE) were calculated. In risk assessment of harvester exposure for 7days, all MOS was > 1 and MOE was > 100 indicating that possibility of risk was little.