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Yunghee Oh
Dong-eui University
MelaninChemistryAntioxidantBiochemistryTyrosinase
7Publications
2H-index
11Citations
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Publications 7
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본 연구는 어성초의 메탄올 추출물을 이용하여 항산화 효능이 가장 좋은 fraction을 찾고, 항산화 효능을 나타내는 성분을 분석하였다. 메탄올 추출에 의한 유기 용매 별 분획에서 항산화 효과가 가장 좋은 ethyl acetate 분획물을 칼럼 크로마토그래피하여 12가지의 fraction 중 가장 높은 항산화 효과를 보인 Fr. 10을 이...
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#2Su-Gyeong LeeH-Index: 1
Last. Yunghee Oh (Dong-eui University)H-Index: 2
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Soybean leaves, a Korean edible plant material, have been reported to prevent the development of osteoporosis and breast cancer. Based on this rational, soybean fallen leaves ethanolic extract (SBFL) was used for the experiment of cell invasion related to metastasis and antioxidant activity. The effect of SBFL on matrix metalloproteinases (MMPs) in human fibrosarcoma cells, HT1080 as well as its antioxidant activity was investigated in this study. The effect of SBFL on scavenging activity of rea...
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#1Eun-Jeong KwonH-Index: 1
#2Hye-Jung ParkH-Index: 4
Last. Yunghee Oh (Dong-eui University)H-Index: 2
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Melanin plays a key role in the protection of skin from ultraviolet light that generates reactive oxygen species (ROS), such as superoxide, hydroxyl radical, singlet oxygen and hydrogen peroxide. However, the ROS leading to the oxidation of lipids, proteins and DNA are involved in the overproduction of melanin that is known to cause melasma, age spots and freckles. Among the herb medicines, Ulmus macrocarpa used in this study was reported to contain flavonoids as a main component. The aim of thi...
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#1Hye-Jung ParkH-Index: 3
#2Eun-Jeong KwonH-Index: 1
Last. Yunghee Oh (Dong-eui University)H-Index: 2
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Poria cocas has been reported to be effective in skin whitening. However, the direct effect of P. cocas ethanol extracts (PCEE) on melanin synthesis has not been scientifically studied. To elucidate the direct effect of PCEE on melanogenesis, a 3,4-dihydroxyindole-2-carboxylic acid (DOPA) synthesis assay, tyrosinase activity assay, and Western blotting for melanogenic proteins, including tyrosinase, tyrosinase-related protein (TRP)-1, and TRP-2 were performed in mouse B16F1 cells. The results re...
1 CitationsSource
#1Hyeong-Joon Park (Dong-eui University)H-Index: 1
#2Moon-Moo KimH-Index: 20
Last. Yunghee OhH-Index: 2
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Prunus mume has been traditionally used as a medicinal food in Korea, Japan, and China. In particular, this fruit has been reported to have beneficial biological effects on gastritis and gastric ulcers. However, its action in relation to skin whitening has remained unclear. Accordingly, the effects of fruit extract of P. mume related to antioxidation and skin whitening were examined in this study. First, using the MTT assay, it was observed that fruit extract of P. mume below 0.1% has no cytotox...
4 CitationsSource
#1Zoon-Ha Ryu (Dong-eui University)H-Index: 2
#2Young-Ho LeeH-Index: 2
Last. Yunghee OhH-Index: 2
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Solvolysis rates of isopropenyl chloroformate (3) in water, D 2 O, CH 3 OD and in aqueous methanol, ethanol, 2,2,2-trifluoroethanol (TFE), acetone, 1,4-dioxane as well as TFE-ethanol at 10 °C are reported. Additional kinetic data for pure water, pure ethanol and 80%(w7w) 2,2,2-trifuoroethanol (T)-water (W) at various temperatures are also reported. These rates show the phenomena of maximum rates in specific solvents (30% (v/v) methanol-water and 20% (v/v) ethanol-water) and, variations in relati...
6 CitationsSource
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