• Journal of Environmental Health Sciences
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• v.33 no.6
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• pp.513-516
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• 2007

This investigation was intended to find out the estrogenic effect of chlortetracycline (CTC) on vitellogenin induction in adult male Japanese medaka (Oryzias latipes). Vitellogenin (Vtg) produced in male fish has been used to as one of a biomarker of endocrine disrupters. The positive control was $17{\beta}-estradiol$ (E2) that induced Vtg in male fish. As a result, male and female fish were exposed to 0.1, 1, 10 and 100 ppm of CTC. Western blot results showed approximately 205 kDa, that is similar to myosin at high molecular weight range Sigma maker. Vtg band was showed fainted to 10 and 100ppm for chlortetracycline. Vtg concentration of CTC was qunatified by total protein quantification and ELISA. Exposure of the male fish to CTC of 0.1, 1, 10 and 100 ppm produced Vtg concentrations of 0.24, 0.12, 7.61 and 40.02%o, respectively, that value was elevated than control male fish (0.14%o). CTC exerted as a Vtg inducer in male fish from 10 ppm, but it was a reducer in female fish from 0.1 ppm level. The results say that vitellogenin induction patterns alter in male medaka treated with CTC, and that CTC may caused endocrine disruption in fish.

• The Journal of the Convergence on Culture Technology
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• v.5 no.1
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• pp.153-167
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• 2019

Purpose: The aim of this study was to examine factors influencing health-related quality of life in middle and old adult one-person households. Method: This study carried out secondary analysis using the data from the $7^{th}$ Korean National Health and Nutrition Examination Survey. Subject samples who were selected are 497 middle and old adult one-person households over 40 years. Data were analyzed using descriptive statistics, simple and multiple regression techniques with the SPSS/WIN 24 program. Result: Factors influencing health-related quality of life in middle adult one-person households were activity limitation, depression, exercise, smoking habits with 57% prediction. In male old adult one-person households they were subjective health, metabolic syndrome, activity limitation, perceived stress with 44.8% prediction and in female old adult one-person households they were subjective health, activity limitation, home income with 35.9% prediction. Conclusion: Therefore, to improve their health-related quality of life it needs to develop & to apply national and local promotion policy and intervention program on health-related quality of life of middle and old adult one-person households.

• The Journal of Korean Academic Society of Nursing Education
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• v.1 no.1
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• pp.46-61
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• 1995

The purpose of this study was to identify the degree of learning desire in the health education of military drill curriculum and to furnish basic data for the effective health education at high school. A total of 594 high school students were participated in the questionnaires and the 12 domains & the 55 questions were utilized for this study. The survey was conducted from March 15 to March 27, 1993 and the collected date were analized by T-test and F-test. The results of this study are as followings : 1. In the 12 domains, respondents indicated high degree of learning desire in 'human & sex', 'nutrition' and 'disease of adult' in that order. However 'accident & disaster', 'transport & management' and 'nursing' were not highly ranked. 2. In the 55 questions, respondents showed high degree of learning desire in 'artificial respiration' & 'cardiopulmonary resuscitation', 'precautionary of adult disease' and 'sex & sex moral' in that order, but low degree of learning desire in 'the management of many wounded persons' and the 'synopsis of nursing'. 3. Comparing the degree of learning desire by grade, the 1st, the 3rd and the End grade were ranked in that order. The 1st and 3rd graders showed higher degree of learning desire in 'human & sex', and the 2nd graders in 'nutrition'. 4. Also, female students showed higher degree of learning desire than male students in general. Female students indicated it in 'nutrition', 'human & sex' and 'adult disease' in that order while male students in 'human & sex', 'adult disease' and 'nutrition' in that order. 5. The academic high school students showed higher degree of learning desire than the vocational high school students. 'Human & sex' was highest ranked at both academic and vocational high school students.

• Journal of The Korean Society of Integrative Medicine
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• v.7 no.4
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• pp.71-79
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• 2019

Purpose : Several studies suggest that smoking and vitamin D level is a risk factor of metabolic syndrome. The objective of this study is to evaluate the association between smoking status, vitamin D levels and the Korean adult male and female metabolic syndrome. Methods : We assessed 3796 participants aged 19 years and older from the Korean National Health and Nutritional Examination Survey 2013, 2014. Smoking statuses were collected from self-reported questionnaires. Subjects were divided into three categories: non-smokers, former smokers, and current smokers. Vitamin D was tested by Radioimmunoassay method and the value of serum 25-hydroxyvitamin D, which is an index of vitamin D status in the body, was used. The diagnosis of metabolic syndrome was made using criteria modified NCEP-ATP III. Logistic regression analysis was used to calculate odds ratios between smoking status, vitamin D levels, and metabolic syndrome. Results : The overall prevalence of metabolic syndrome was 23.0 % in men and 15.4 % in women. After adjusting for smoking, the odds ratio for men's metabolic syndrome in current smokers was 1.77 (95 % CI, 1.30~2.41), while for former smokers OR was 1.63 (95 % CI, 1.15~2.31) compared with nonsmokers. After adjustment vitamin D, the odds ratio for women's metabolic syndrome in vitamin D deficiency was 1.44 (95 % CI, 1.11~1.87) compared with normal. Conclusion : Smoking status was associated with an increased risk of metabolic syndrome in Korean adult males and decreased vitamin D level was associated with an increased risk of metabolic syndrome in Korean adult females.

• Development and Reproduction
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• v.19 no.4
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• pp.217-226
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• 2015

A proper development of the epididymis during the early postnatal development is required for successful fertility in the adult male. Direct cell-cell communication via connexin (Cx) molecules is a common way of cellular interactions to achieve normal development of a given tissue consisting of different cell types. The present research was attempted to determine the effect of exogenous exposure to estrogenic agonist or antiandrogen at the weaning age on expression of Cx isoforms in the adult corpus epididymis. Male rats were subcutaneously administrated with estradiol benzoate (EB) or flutamide (Flu) at the weaning age. The tissue was collected at 4 months of age. Expressional levels of Cx isoforms were determined by a quantitative real-time PCR. Statistical comparison showed significant increases of Cxs31, 32, 37, 40, and 43 transcript amounts by a treatment of $0.015{\mu}g$ of EB /kg body weight (BW). A treatment of $1.5{\mu}g$ of EB /kg BW caused a significant decrease of Cx43 gene expression but increases of Cxs26, 31, 32, 37, and 40 transcript levels. Exposure to $500{\mu}g$ of Flu/kg BW induced an increase of Cx37 expression but significant decreases of Cxs43 and 45 mRNA levels. Expression of Cx37 was increased by a treatment of 5 mg of Flu/kg BW, while transcript levels of Cxs26, 30.3, 31, 31.1, 32, and 43 were significantly decreased by same treatment. These results demonstrate that exposure to steroidal compounds at the early developmental age alters expression of Cx isoforms in the adult corpus epididymis.

• Korean journal of applied entomology
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• v.38 no.2
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• pp.129-138
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• 1999

This study was carried out with two types of silkworm, Bombyx mori, adults having different life span: long life span (adult living for more than fifteen days; LLS), and short life span (adult living less for than five days; SLS). The fine structures of fat body cells in the young and the senescent males and females were compared in an attempt to elucidate the aging physiology of the silkworm adult. In SLS, there were many rough endoplasmic reticula (RER) and glycogen granules in the female cytoplasm, whereas the smooth endoplasmic reticula (SER) were observed in the male cytoplasm. Also in SLS, the mitochondria were swollen and had many poor osmiophillic inclusions (fatty degeneration) at three days after emergence. In LLS, compared to SLS, comparatively normal mitochondria and nuclear membrane were observed in even five day old female. In fifteen day old LLS female, however most of cell membranes were disappeared and mitochondria were abnormally expanded. Many fat granules were observed in the cytoplasm of ten day old male (LLS) which died with full autophagic vacuole (AV) collapsed at fifteen days. Therefore, it is suggested that SLS type is recommended for the study of aging tissue, because it is easier to monitor the changes in tissue structure.

• Korean journal of applied entomology
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• v.30 no.1
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• pp.86-93
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• 1991

Adult eclosion and emergence behavior of the black pine base scale, Matsucoccus thunbergianae Miller and Park, was studied in a laboratory. Adult eclosion in males did not appear to be limited to a specific time of the day. Newly molted male adults, at room temperatures, usually remained in the cocoons as pre-emergence adults for 0.5-20. days before emerging; most males emerged within one hour after the onset of photophase, and emergence was faster at higher light intensity. Most females molted into adults within three hours after the onset of photophase, and they were active immediately after molting. Quiescence in males appears to help the scales concentrate their sexual activity within a particular period of the day as well as to protect newly molted adults until sexual and locomotive maturity.

• The Journal of Korean Society for School & Community Health Education
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• v.21 no.1
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• pp.15-31
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• 2020

Background and objectives: One-person households are the fastest growing family type in Korea. They bring social concerns such as weakened social integration, increasing poverty and social isolation. They are not homogeneous but heterogeneous groups depending on their socio-demographic characteristics including generation. This study compared the life satisfaction level as well as factors affecting it among the three one-person household generations Methods: The 13th wave of the Korea Welfare Panel dataset with 1,187 respondents was utilized. For data analysis Chi-square test, analysis of variance and hierarchical regression analysis were employed. Generations are divided into three, namely young adult (20-39), the middle-aged (40-64) and the elderly (65 and over). Result: The life satisfaction level was highest among the young adult one-person household generation, followed by the middle-aged and the elderly generation. The common factors affecting life satisfaction of the three generations were physical as well as mental health, including self-esteem and depression. However, there were more factors different from generation to generation. As for the young adult, age, religion, and smoking were significant. As for the middle aged and the elderly, gender (male) and income were significant. Additionally, age, home-ownership and drinking were significant to the elderly generation. Conclusions: As there are differences as well as similarities among the three generations, policies for one-person households need to be devised considering these findings. For all generations, both physical and mental health policies are needed. For young adult strengthening social relations, providing decent jobs, and promoting anti-smoking policy are major agenda, and for the middle-aged and the elderly, assisting in social capital accumulation (for male), providing stable jobs and diverse leisure activities, and securing income. Additionally, for the elderly, expanding the social security system and housing support are needed.

• Korean Journal of Adult Nursing
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• v.24 no.5
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• pp.520-530
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• 2012

Purpose: This research analyzed the different factors that influenced smoking cessation motivation. Methods: Subjects were both current and past male adult smokers. Data collection was conducted in four small businesses in Seoul and one public enterprise in Gyeonggi-Province from December 10, 2011 to January 30, 2012. Reasons for Quitting (RFQ) scale which was developed by Curry et al. was used for data collection. There were 350 participants and 324 (93%) questionnaires were used for the statistical analysis. Results: Participant's level of motivation varied by present smoking, quit attempt, smoking cessation counseling, level of nicotine dependence, stages of smoking cessation, and types of smoking. Participant's drinking pattern, smoking cessation counseling, social seeking type (G) and stages of smoking cessation had a 13% explanatory power for being motivated to stop smoking. Conclusion: For participants who drink alcohol regularly, who do not participate in smoking cessation counseling and those who are in the pre-contemplation stage for smoking cessation are candidates for future smoking cessation intervention programs or smoking cessation motivation programs.

• Animal Systematics, Evolution and Diversity
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• v.26 no.3
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• pp.341-343
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• 2010

The sterrhine species Scopula plumbearia (Leech) is reported for the first time in Korea, based on four male specimens from an island in Dadohaehaesang National Park, Jeonnam Province. Diagnosis of the species is provided with a brief description of the adult, including male genitalia.