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화염법으로 제조된 TiO<sub>2</sub> 나노분말의 결정구조에 미치는 화염가스 유량의 영향
지현석,안재평,허무영,박종구 한국분말야금학회 2003 한국분말재료학회지 (KPMI) Vol.10 No.6
$TiO_2$ nanopowder has been synthesized by means of the flame method using a precursor of titanium tetraisopropoxide (TTIP, Ti$(OC_3H_7)_4)$. In order to clarify the effect of cooling rate of hot flame on the formation of $TiO_2$ crystalline phases, the flame was controlled by varying the mixing ratio and the flow rate of gases. Anatase phase was predominantly synthesized under the condition having the steep cooling gradient in flame, while a slow cooling gradient enabled to form almost rutile $TiO_2$ nanopowder of above 95%.
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College of Pharmacy, Chungnam National University
지현석,Yong-An Kim 국민체육진흥공단 한국스포츠정책과학원 2016 International Journal of Applied Sports Sciences Vol.28 No.1
This study analysed the influence of a 4 week combined weight bearing circuit exercise program in the body composition, physical fitness, and blood profile of an perimenopausal women (aged from 40 ~ 60, N = 29). Significant improvements were found in blood related parameters, fat-related parameters in body compositions and physical fitness parameters (P<0.01). As skeletal muscle mass (SMM) and lean % Dual-energy X-ray absorptiometry (DXA) considered as a standard for muscle mass in this study are used because each standard showed significant differences (P<0.01) and each standard significantly correlated with SMM, weight, time to exhaustion, fat-related parameters such as fa t% DXA, lean % DXA and free fatty acid in pre and post exercise. Blood-related parameters (creatinine, glucose, HDL-cholesterol, and total protein) significantly correlated with changes in each corresponding blood-related parameter after exercise (P=0.000). Exercise contributed to improving muscle mass-related parameters used as biomarkers in this study, which improved the positive changes of healthy indices are indispensable factors for evaluating the effects of exercise. These changes contribute to a virtuous cycle, which accelerates the capacity to perform exercise. It suggests that the weight-bearing circuit exercise can improve the quality of life of perimenopausal women.
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지현석(JeeHyunseok),허정빈(HuhJungBin),김종희(KimJong-Hee) 한국체육학회 2019 한국체육학회지 Vol.58 No.4
The purpose of this review is to summarize current knowledge regarding animal sarcopenia and frailty models and their diagnosis indexes. In addition, we introduce the effects of exercise interventions on sarcopenia and frailty syndrome. Data collection and analysis (fifteen published articles from 2005∼2017) were conducted by using keywords’ sarcopenia index, frailty index, exercise and mice, and so on’ in academic search engines such as Google scholar and Pubmed. Sarcopenia and frailty are the representative syndromes in elderly peoples which those symptoms can be effectively prevented or delayed by extremely adjusted long term exercise interventions (The combined oxidative and resistant exercise program might be ideal.).
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