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RISS 인기검색어
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- 저자 : 차화준(Hwa-Jun Cha) (검색결과 6 건)
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차화준(Hwa-Jun Cha),강신범(Sin-Buem Kang) 한국마린엔지니어링학회 2006 한국마린엔지니어링학회 학술대회 논문집 Vol.2006 No.-
Mistral급과 RS:X급에 대한 장비비교를 통한 국내선수들의 육성 방안 및 장비의 기술적인 면을 비교분석하여 국제 공식대회(올림픽, 아시안게임 등)에서 좋은 결과를 얻고 자 하며 윈드서핑 경기정의 발전 방향을 모색하고 분석하는데 자료로 활용되고자 한다.
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유산소운동능력의 차이가 로윙에르고미터 최대하 운동시 혈중 활성산소에 미치는 영향
강신범(Shin-Beum Kang),차화준(Hwa-Jun Cha),하해동(Hae-Dong Ha) 한국항해항만학회 2010 한국항해항만학회지 Vol.34 No.10
본 연구는 유산소운동능력의 차이를 보이는 두 집단이 각각 로윙에르고미터 최대하 운동을 실시한 후 혈중 활성산소의 변화에 어떠한 차이를 나타내는지 구명하는데 목적이 있으며 연구대상으로는 조정 선수집단 6명과 비선수집단 6명을 대상으로 최대유산소운동능력을 검사한 후 각각의 목표심박수 85~90%를 적용하여 로윙에르고미터 운동을 실시하였고 운동 전, 직후, 10분, 20분, 차30분에 각각 채혈하여 활성산소의 변화를 분석하였다. 그 결과는 유산소운동능력의 차이에 따른 활성산소의 변화에서 집단과 시기 간 상호작용 효과는 유의한(p<.05) 차이를 나타내어 시기에 따른 변화의 양상이 집단 간 차이가 있었고 사후검증 결과 회복기 10분에서 20분 그리고 20분에서 30분 구간에서 유의한 차이가 나타났다. 결론적으로 인체에 부정적인 영향을 미치는 활성산소로부터 유산소운동능력이 우수한 조정선수집단이 비선수집단에 비해 긍정적인 회복 패턴을 보였다. The purposes of this study were to examine the effects of aerobic exercise capacity on free oxygen radicals in blood(FORB) during submaximal exercise in rowing ergometer and as for study purposes, a set of experiments were conducted using one group of 6 rowing players(RP) and the other group of 6 non rowing players(NRP) at the maximum heart rate reserve(HRR) 85~90% exercise intensity. Oxygen free radical was sampled 5 times including a rest period(ARP), immediate after exercise(IAE), 10 minutes after exercise(10MAE), 20 minutes after exercise(20MAE) and 30 minutes after exercise(30MAE). Accordingly, following findings were derived from current study. The effects of interaction between groups and times were significant in oxygen free radical(p
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Centella asiatica 추출물을 함유한 주름 개선 화장품의 효능 평가
윤영민 ( Yeong Min Yoon ),차화준 ( Hwa Jun Cha ),홍미선 ( Mi Sun Hong ),안성관 ( Sung Kwan An ) 한국미용학회 2011 한국미용학회지 Vol.17 No.4
Although it has been reported that extracts of Centella asiatica (C. asiatica), a pharmacological plant containing various pentacyclic triterpenes, exert wound healing and collagen synthesis in skin cells, there are only a few clinical studies of the effect of C. asiatica extracts on human skin. In this study we have examined the anti-wrinkle and lifting effects of cosmetics containing extracts of C. asiatica on eleven healthy subjects. Compared to before and after treatment, the visual grade of wrinkle was improved 3.05% after 4 weeks. Ra, Rz and Rp parameters were significantly reduced after 4 weeks (p<0.05). The dermal density was significantly improved after 2 and 4 weeks (p<0.05). Skin sagging was significantly improved immediately after using the product, after 2 and 4 weeks. Adverse reactions of subjects were not observed during the course of the study. These observations indicate that C. asiatica extracts have the antiwrinkle and lifting effects on human skin and can be usefully applied to the anti-aging cosmetic industry.
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UVA이 조사된 인간진피섬유아세포에서 멜라닌 세포 자극 호르몬 α-MSH에 의한 발현변화 분석
이윤경 ( Yun Kyung Lee ),최수기 ( Su Ki Choi ),김영주 ( Young Joo Kim ),차화준 ( Hwa Jun Cha ),안성관 ( Sungkwan An ) 한국미용학회 2012 한국미용학회지 Vol.18 No.1
Photo-aging of skin is caused by chronic irradiation of Ultraviolet A (UVA). It has been known that chronic irradiation of UVA induces loss of dermal extracellular matrix due to loss of fibroblast cells and their versatile functions. Melanogenesis induced by alpha-melanocyte stimulating hormone (α-MSH) is a representative mechanism to protect skin against UV. However, there are few studies on another effect of α-MSH on protection of UVA. To demonstrate another function of α-MSH in fibroblasts, in this report, we present the alteration of transcription patterns by α-MSH in UVA-irradiated human dermal fibroblasts (HDFs). Eleven genes with known functions for proliferation and hormone secretion were significantly up-regulated and 31 transcripts for apoptosis were down-regulated by α-MSH. Especially, bax, one of well studied apoptosis related genes, was down-regulated by α- MSH in UVA-irradiated HDFs. Moreover, viability decreased by UVA was recovered by α-MSH. These results demonstrate that α-MSH is a critical repressor of UVA-dependent growth inhibition and apoptosis by regulating the expression of transcripts in HDFs.
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인간 섬유아세포주에서 resveratrol에 의한 GADD45 alpha 유전자 발현 증가와 이를 통한 DNA 수복
최수기 ( Su Ki Choi ),이윤경 ( Yun Kyung Lee ),차화준 ( Hwa Jun Cha ),안성관 ( Sung Kwan An ) 한국미용학회 2012 한국미용학회지 Vol.18 No.1
In skin, dermal fibroblasts are a primary center of organization of dermis. Decrease of dermal fibroblasts through DNA damage by UV, oxidative stress and chemicals induces disorder of skin structure and homeostasis. Therefore, DNA damage protection and evasion are important in cosmetics. Resveratrol (trans-3, 4`, 5-trihydroxystilbene) is a polyphenol occurred naturally in grape and various medicinal plants. Although it has been shown that resveratrol decreases reactive oxygen species (ROS) by direct and indirect mechanism and increases the DNA repair activity, its detailed molecular mechanism has not been understood, thoroughly. Here we show that resveratrol plays a critical role in activation of the DNA repair activity by inducing GADD45α in human dermal fibroblasts (HDFs). Using DNA microarray analysis, qRT-PCR and promoter assay, we demonstrated that resveratrol increases expression of GADD45α in HDFs. We also found that resveratrol increases G2/M arrest and the DNA repair activity. The results here suggest that up-regulated expression of GADD45α by resveratrol attenuates cell death thought G2/M arrest and increase of the DNA repair activity in HDFs.
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박규태(Kyu-Tae Park),강신범(Shin-Beum Kang),하해동(Hae-Dong Ha),이재형(Jae-Hyoung Lee),차화준(Hwa-Jun Cha) 한국항해항만학회 2007 한국항해항만학회 학술대회논문집 Vol.1 No.춘계
본 연구는 요트선수의 경쟁상태불안이 경기력에 어떠한 영향을 미치는지를 규명하는데 그 목적이 있다. 연구대상은 제10회 해군참모총장배 전국요트대회에 참가한 중·고교, 대학, 실업 요트선수 선수 70명을 무작위로 선정하였다. 본 연구는 요트선수의 경기 전 경쟁상태불안을 측정하기 위하여 인지적 상태불안 측정 9개 문항, 신체적 상태불안 측정 9개 문항, 상태자신감 측정 9개 문항인 총 27개 문항으로 구성된 경쟁상태불안 검사지(CSAI-2)를 사용하였다. 본 연구는 요트선수의 종목과 기능수준에 따른 경쟁상태불안 및 경력과 소속에 차이를 알아보기 위해 실시하였으며 연구결과 요트선수의 경쟁상태불안이 소속, 경력, 기능수준 등에서 경기력에 영향을 미치는 것으로 나타났으며 연구결과를 바탕으로 요트선수의 경기력 향상에 도움이 될 수 있는 기초 자료로 활용하고자 한다. The purpose of this study was to investigate the effect of sailors' competitive state anxiety on the performance. Sixty-nine high school, university and business-based team sailors who were registered to The 10th of the Chief of naval operations' Korean national championship were randomly recruited for this study. In order to check the sailors' anxiety form the competition, the CSAI-2 test was used. It was composed of 27 questions covering the cognitive and physical anxieties, and state-confidence respectively with 9 questions.
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