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조영호,최택진 漢陽大學校 體育科學硏究所 2003 體育科學 Vol.23 No.23
The purpose of study was to make a comparative analysis of the fundamental contents offered by leisure portal Web sites and of individual company's unique, specific contents in an attempt to serve as a basis for successful development and operation of leisure portal Web site in the future. The findings of this study were as follows: 1.In promotion section, product information, specially planned product information, auxiliary window and live image were provided as ad efforts. In regard to public relations, company introduction, company news, membership, club and lecturer information were offered. And premium event and cyber money were supplied for sales promotion. 2. The information sector were divided into leports(leisure and sports)-related information and general information. The information on every leisure sporting event and cultural information on entertainment, amusement and movie were provided, 3. For external leports-related link, they were linked to Web sites on swimming, golf, sporting goods, fitness club and aerobic, And the other general external link sevices were associated with sites on weather, travel agency, international phone call. movies, insurance and games. 4. Regarding customer service sector, bulletin board, counseling, site map and e-mail were supplied. 5. To fuel the development of leisure portal Web sites, the above-mentioned four types of contents should be included fundamentally, and food information of higher technical and visual quality should be prepared. Company club activities should be more dynamized, and differentiated sales promotion efforts are needed by using a variety of inviting premium events, auction and cyber money. Each site should be able to offer sufficient, abundant information on its own, and external link service should be prepared of necessary. Another mandatory requirement is to develop more extended, better customer service, including warranty service, inconsideration of user convenience. In conclusion, differentiated, unique contents should be designed for each of promotion, information, external link and customer service sectors, and sustained investment is required since there are limitless potentialities for the Internet marketing is required since there are limitless potentialities for the Internet marketing. This will be a way for leisure portal Web sites to successfully copewith the rising tide of huge capital and pursue further development.
흰쥐의 감각신경절세포에 대한 Methylmercuric chloride의 독성효과
鄭榮吉,白承和,韓斗錫,柳道坤,朴承澤 한국전통의학연구소 1998 한국전통의학지 Vol.8 No.1
흰쥐의 배양 척수감각신경절세포에 대한 methylmercuric chloride(MMC)의 세포독성을 조사하기 위하여 여러 농도의 MMC가 포함된 배앙액에서 24시간 동안 배양한 후 MTI assay법에 의하여 세포의 생존율을 조사하였다. MMC는 농도에 비례하여 세포의 생존율을 감소시켰다. 또한 여러 농도의 MMC가 포함된 배앙액에서 흰쥐의 척수 감각신경절(dorsal root ganglion, DRG) 세포를 24시간 동안 처리한 결과 MTI_(50) 값이 25μM MMC에서 나타났다. MMC는 Borenfreund등(1988)의 독성판정기준에 의하여 흰쥐의 배앙 DRG 세포에 고독성인 것으로 나타났다. 이상의 결과는 MMC가 흰쥐의 배양 척수감각신경절세포에 강한 신경독성 효과가 있음을 제시하였으며 또한 배양신경세포는 약제의 효과를 검색하는데 효과적이었다. To examine the cytotoxic effect of methyl mercuric chloride(MMC) on the cultured rat spinal dorsal root ganglion(ORG) neurons, cell viability was measured by MTT assay after rat spinal ORG neurons were incubated with media containing various concentrations of MMC for 24 hours The results were as follows ; 1. MMC decresed cell viability of rat spinal ORG neurons in a dose-dependent manner. 2. MIT_(950) value was a 25uM MMC after spinal ORG neurons were cultured for 24 hours at various concentrations of MMC. 3. MMC was heighly toxic on the cultured ORG neurons by the toxic criteria of Borenfreund et al.(1988). From above the results, it is suggested that methylmercury involves in neurotoxicity by the decrease of cell viability in cultured rat spinal DRG neurons, and cultured neurons are effective in screening the putative agents.
이영택 ( Young Taeck Lee ),김훈 ( Hoon Kim ),신학수 ( Hak Soo Shin ) 한국운동역학회 2010 한국운동역학회지 Vol.20 No.4
The purpose of this study was to evaluate the effect of balance training on gait stability. The study population included 17 male high school students who were divided into 3 groups, each of which underwent one of the following types of balance-training programs for 8 weeks: 1 foot standing on cushion foam, trunk muscle training, and inverted body position training. 0, 4, and 8 weeks, the following experiment was performed: The participants were asked to close their eyes and take 17 steps; the stability of forward and sideward movement was determined, and the direction linearity was measured. The results revealed that all the training programs caused a decrease in stride deviation and an increase in the and the stride length, thereby improving the stability of forward movement. All the programs decreased the variation in step width and were thus also effective in improving the stability of sideward movement. The inverted body position training program was considered very effective because the cross point appeared on post hoc graphic analysis after 4 weeks, and the deviation length for 10 m was low, i.e., below 4 cm. All the programs were effective with respect to direction linearity because they decreased the deviation in direction widths. The results indicate that whole-body neurocontrol training is more effective than simple muscle training and local focused balance training, although this neurocontrol training-in the form of inverted body position training-required a longer training period than did the other programs.
보문: Chromium Trioxide로 유발된 세포손상에 대한 Lavender 오일의 항산화 효과
박승택 ( Seung Taeck Park ),유영월 ( Young Wall Ryu ),김선주 ( Sun Ju Kim ),김지원 ( Ji Won Kim ),서영미 ( Young Mi Seo ),박미순 ( Mi Soon Park ),김은주 ( Eun Ju Kim ),이화정 ( Hwa Jeong Lee ),정인주 ( In Ju Jung ) 대한미용학회(구 대한미용과학회) 2011 대한미용학회지 Vol.7 No.2
The cell viability by XTT assay, DPPH-radical scavenging activity, superoxide dismutase (SOD)-like activity and lipid peroxidation were measured to evaluate the cell injury of chromium trioxide (CrO3) and the antioxidative effect of lavender (Lavendula angustifolia L.) oil on the cell injury induced by CrO3 in cultured C6 glioma cells. C6 glioma cells were then treated with the media containing 30~50 μM of CrO3 for 48 hours. The results of this study showed that CrO3 remarkably decreased cell viability in dose-dependent manner and the XTT50 value was appeared at 40.5 μM of CrO3. In the effect of antioxidant, SOD on CrO3-mediated cytotoxicity significantly increased the cell viability which was decreased by CrO3. Meanwhile, in the protective effect of lavender oil on the cytotoxicity induced by CrO3, it remarkably increased the cell viability damaged by CrO3-mediated cell injury and also showed the DPPH-radical scavenging activity, SOD-like activity and the inhibitory activity of lipid peroxidation. From these results, it is revealed that the cell injury by CrO3 was involved in oxidative stress and lavender oil was effective in the protection of CrO3-mediated cell injury by antioxidative effect.