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우리나라 청소년의 신체활동과 사회경제적 변수와의 관련성
오인환,이고은,오창모,최경식,최봉근,최중명,윤태영,Oh, In-Hwan,Lee, Go-Eun,Oh, Chang-Mo,Choi, Kyung-Sik,Choe, Bong-Keun,Choi, Joong-Myung,Yoon, Tai-Young 대한예방의학회 2009 예방의학회지 Vol.42 No.5
Objectives : The physical activity of Korean adolescents and its distribution based on social characteristics have not yet been fully assessed. This study intends to reveal the distribution of physical activity by its subgroups and offer possible explanatory variables. Methods : The 3rd Korea Youth Risk Behavior Web-based Survey was analyzed for this study. The appropriateness of physical activity was defined by Korea s Health Plan 2010 and physical inactivity was assessed independently. Family affluence scale, parents education levels, subjective economic status, grade, and school location were considered explanatory variables. All statistical analysis was conducted using SAS ver. 9.1. Results : The proportion of participants engaging in vigorous physical activity was high in males (41.6%), at a low grade (38.5%), within the high family affluence scale group (35.5%). The distribution of participants engaging in moderate physical activity showed similar patterns, but the overall proportion was lower (9.8%). Low family affluence and students with lower subjective economic status reported a higher prevalence of physical inactivity. In multiple logistic regression analysis for physical activity, significant factors included family affluence scale (p<0.05). For physical inactivity, family affluence scale, parents education levels, and subjective economic status were included as significant factors (p<0.05). Conclusions : The results suggest that the physical activity and inactivity of adolescents may be affected by socioeconomic variables, such as family affluence scale. This implies the need to take proper measures to address these socio-economic inequalities.
Reduction of Tertiary Amides with Borane in the Presence of Trimethyl Borate
오인환,윤녕민,경영수,Oh In Hwan,Yoon Nung Min,Gyoung Young Soo Korean Chemical Society 1989 Bulletin of the Korean Chemical Society Vol.10 No.1
Various tertiary amides have been subjected to the reduction by borane-THF in the presence of trimethyl borate at $0^{\circ}C$ and the product ratio of alcohol and amine have been analyzed in order to find out the possible way to obtain one product exclusively on the basis of the structure of amides. In the case of N,N-dimethyl derivatives of both linear aliphatic and aromatic amides the corresponding alcohols were produced predominantly. However, the bulkier tertiary amides such as N,N-diethyl and hindered acid derivatives afforded amines rather than alcohols. The mechanism of borane reduction of tertiary amides is also discussed.
오인환,박정현,김범석,이상락,맹원재,Oh, In-Hwan,Park, Joeng-Hyun,Kim, Beom-Seok,Lee, Sang-Rak,Maeng, Won-Jae 한국축산환경학회 1995 축산시설환경학회지 Vol.1 No.1
An efficient Treatment of animal wastewater is one of the hot issues for preventing the environmental pollution. It should be established the design parameter in order to purify the animal wastewater. A test is carried on in the pilot plant as a simplified activated sludge process. A vibration sieve separator is deviced to keep the pollution load constant by means of separation of solid matter. The BOD removal efficiency of the vibration sieve showed over 50%. As the test results, the BOD contents of the influent was in average of 3,000 mg/I and that of the effluent 85 mg/I. So, the BOD removal rate showed 97% in average. The SS-contents in the primary chamber was about 3,300 mg/I and that of effluent 92 mg/I. The SS removal efficiency showed 97%. The removal rate of total nitrogen and phosphore were in average of 82% respectively. Carrying out in winter season, it showed relatively good results; The design parameter approved in this test can be applied to the full-time farmers.
간헐적인 저압ㆍ저산소 트레이닝이 엘리트 중장거리 육상선수의 운동능력 및 혈액성분에 미치는 영향에 대한 사례연구
오인환(Oh In-Hwan),조영석(Cho Yong-Seok) 한국체육과학회 2009 한국체육과학회지 Vol.18 No.2
To investigate the training effect in hypoxic hypobaric circumstance(2,000m) on exercise performance(VO₂max and event records) and blood variables(RBC, WBC, Hb, Hct, EPO, Ferritin), women elite middle-long distance runner(n=3) trained 60min/bout, 7bouts during 2weeks using bicycle ergometer in hypoxic hypobaric chamber(2,000m). Exercise intensity of training was 75%HRmax that aussumed by Miyasitha(1975). VO₂max was assessed by incremental maximal exercise test and event record was assessed by official event that subjects participated in before and after training. All testing was performed under normoxic conditions. After 7bouts of hypoxic hypobaric training, there is no significant difference in all variables. However, VO₂max, EPO, RBC, Hb, Hct are tend to increase in all subjects. Moreover, All subjects made their personal best records in events after training. We conclude that 7bouts of training in hypoxic hypobaric circumstance(2,000m) tend to improved VO₂max, event record.