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홍다검ㆍ이희경ㆍ이정현(Da Geom HongㆍHee kyung LeeㆍJeong Hyun Lee) 한국인체미용예술학회 2016 한국인체미용예술학회지 Vol.17 No.1
Recently, nail industry trends have been shifting from polish nail to gel nail. Because of the popularity of gel nail, the criteria for customers to choose colors have significantly changed. Therefore, there has been a rising demand for a nail color which goes well with skin color, not with the color of clothes, makes the hand more beautiful. Unlike a face, hand skin color isn’t corrected through makeup. Therefore, it is more difficult to find a color which is well matched with the skin tone. In this sense, the accurate analysis and classification of hand skin color which is the first step in the selection of nail color are required. However, it’s still very hard to find studies on hand skin color. To figure out the characteristics of Koreans’ hand skin color by age, this study analyzed differences in hand skin color by age after measuring the tone of the back of the hand and conducting quantitative analysis against 300 women living in Busan, Ulsan and Gyeongnam. The results revealed statistically significant difference (p.001). As the respondents were younger, a bright skin tone was observed. According to analysis on the distribution by the rank, ‘20s’ was the highest with 46% among those with a bright skin tone within top 100 ranks. In top 300 ranks, in contrast, ‘50s’ was the highest with 46% while ‘20s (8%)’ was the lowest. In terms of a skin tone, there was a considerable difference between ‘20s’ and ‘50s.’ Even though no big difference was found between ‘30s’ and ‘40s,’ a skin tone was brighter in the latter.
이정현(Jeong Hyun Lee),윤성효(Sung-Hyo Yun) 한국암석학회 2011 암석학회지 Vol.20 No.3
제주시 봉개동의 고냉이술 일대의 지질은 오래된 것으로부터 영평동현무암, 신안동현무암, 봉개동현 무암 및 분석층으로 구성된다. 영평동현무암과 신안동현무암은 고냉이술 오름의 남쪽 중산간 지역에 위치하고, 고냉이술 오름과 그 북부 저지대 일원에는 봉개동현무암이 분포한다. 봉개동현무암은 아아 용암으로 주로 구성되며, 용암 켜 사이에 두터운 클링커를 협재하고 있다. 고냉이술 오름은 화산지형학적으로 하나의 독립된 소화산으로 만들어져 있으며, 고냉이술 오름의 산정부에는 낮은 외륜산릉으로 둘러싸여 있는 넓은 분화구를 가지고, 그 내부에는 분지형 함몰지인 여러 개의 피트 분화구(pit crater)를 가지는 용암순상화산이다. 고냉이술 오름의 저면 고도는 295 m에서 300 m (평균 297.5 m)이며, 최고봉의 고도는 304.5 m, 저면의 지름은 평 균 597.5 m, 비고는 7.9 m로 사면경사각은 1.5°이다. The geology of the Gonaengisool-oreum, Bonggae-dong, Jeju consists of Yeongpyeong-dong basalt, Shinan-dong basalt, Bonggae-dong basalt and cinder in ascending order. Yeongpyeong-dong and Shinan-dong basalt is situated at the mid-mountain slope in southern part of the Gonaengisool-oreum, and Bonggae-dong basalt is located at the Gonaengisool-oreum area and northern low foot of the mountain. Bonggae-dong basalt is aa lava flows with thick clinker. The Gonaengisool-oreum is isolated small volcano, that is, a lava shield having wide crater in the summit with several small pit craters. The average basal elevation of the Gonaengisool-oreum cone is 297.5 m(highest 300 m and lowest 295 m), and the highest summit is 304.5 m, average cone basal width is 597.5 m and cone height is 7.9 m, and mean slope of 1.5° for the flank of the shield cone.
단보 : Limonene의 세포독성과 항Malassezia 활성
이정현 ( Jeong Hyun Lee ),이재숙 ( Jae Sug Lee ) 한국미생물생명공학회(구 한국산업미생물학회) 2011 한국미생물·생명공학회지 Vol.39 No.4
우리의 이전의 연구에서 Citrus auranifoli 오일은 Malassezia furfur와 Malassezia pachydermatis에 대해 항곰팡이 활성을 나타낸다는 것을 보여주었다. 본 연구에서 Citrus auranifoli 오일의 주요 성분인 리모넨(limonene)의 M. furfur와 M. pachydermatis에 대한 저해효과를 디크스 확산 방법(disk diffusion method)에 의해 측정하였고, Beas-2B 세포에 대한 세포독성을 cytopathic effect reduction 방법에 의해 측정하였다. Limonene의 최소곰팡이저해농도(minimum fungicidal concentration)는 양성대조구인 itraconazole보다 더 낮았고, 100 μg/mL의 농도에서 Beas-2B cells에 대한 세포독성을 나타내지 않았다. 그러나 itraconazole은 같은 농도에서 약한 세포독성을 나타내었다. 그러므로, 우리의 결과에서 limonene는 비세포독성과 함께 M. furfur and M. pachydermatis의 성장저해를 하는데 효과적이라는 것을 보여준다. A previous study of ours indicated that Citrus auranifoli oil possesses antifungal activity against Malassezia furfur and Malassezia pachydermatis. In this study, we evaluated the anti-M. furfur and M. pachydermatis activities of limonene, which is a major component of C. aurantifolia oil, using the disk diffusion method. We also examined cytotoxicity against human normal epithelial (Beas-2B) cells using the cytopathic effect reduction (CPE) method. The results revealed that the minimum fungicidal concentration (MFC) value of limonene is lower than the value for itraconazole. The MFC value of limonene was seen to be 7.81 μg/mL against M. furfur and 3.90 μg/mL against M. pachydermatis. MFC values of itraconazole against M. furfur and M. pachydermatis were 62.50 μg/mL and 31.25 μg/mL, respectively. In addition, it was noted that limonene was not toxic to Beas-2B cells with normal morphology at a concentration of 100 μg/mL. However, itraconazole exhibited weak toxicity at the same concentration. Therefore, our results indicate that limonene could potentially be effective at controlling M. furfur and M. pachydermatis infections with no cytotoxicity.