Living systems constantly suffer from atmospheric reactive oxygen species and also produce inevitably them by the course of metabolism. Therefore, antioxidants play important roles in protecting the systems from various diseased caused by them. In this study, we investigated various tinged autumnal ...
Living systems constantly suffer from atmospheric reactive oxygen species and also produce inevitably them by the course of metabolism. Therefore, antioxidants play important roles in protecting the systems from various diseased caused by them. In this study, we investigated various tinged autumnal leaves as antioxidant sources. Among the, the red leaf extracts of Acer Palmatum THUNBERG.(Aceraceae: maple tree) and Prunus Donarioum Sieb. Var. spontanea Makino(Rosaceae : cherry trees) showed the highest anti-oxidativities. The major antioxidants in their red leaves were isolated and identified as vitexin from maple leaves and isoscutellarein-4'-O-$\beta$-glucopyranoside from cherry leaves. Finally, we evaluated the efficacy of skin care products containing the extracts by human use study. As a result, the tinged leaves of maple and cherry trees were evaluated as good antioxidant sources on the bases of antioxidativities, cytotoxicities, cell proliferation effects and human use study.
Living systems constantly suffer from atmospheric reactive oxygen species and also produce inevitably them by the course of metabolism. Therefore, antioxidants play important roles in protecting the systems from various diseased caused by them. In this study, we investigated various tinged autumnal leaves as antioxidant sources. Among the, the red leaf extracts of Acer Palmatum THUNBERG.(Aceraceae: maple tree) and Prunus Donarioum Sieb. Var. spontanea Makino(Rosaceae : cherry trees) showed the highest anti-oxidativities. The major antioxidants in their red leaves were isolated and identified as vitexin from maple leaves and isoscutellarein-4'-O-$\beta$-glucopyranoside from cherry leaves. Finally, we evaluated the efficacy of skin care products containing the extracts by human use study. As a result, the tinged leaves of maple and cherry trees were evaluated as good antioxidant sources on the bases of antioxidativities, cytotoxicities, cell proliferation effects and human use study.
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문제 정의
In this report, we describe the possibility of tinged autumnal leaves as antioxidants, their active substances and applications to cosmetics.
가설 설정
In this study, we focused on the possibility of tinged aut니mnal leaves as antioxidant sources. The seasonal changes vary growing process of plants and temperature and sunshine duration are major factors to affect the color change of leaves.
제안 방법
The fraction was separated into various subfractions on silica gel column chromatography (230-400mesh, Silica gel 60F254, Merck) using chlorofbnii-ethyl acetate-methanol (1:1:1) as an eluent. After examined by NBT test, the subfraction which had the potent activity was concentrated and further purified by flash column chromatography. The compound was named antioxidant B (70mg, 0.
The volunteers also had wrinkles around eye area (crow's feet). The sample was applied to the crow's feet zone twice daily at home for 56 days. The experimental conditions during measurements were maintained constantly under the ambient temperature of 24±2C and relative humidity between 40-60 %.
sions) were prepared. To examine thermal stability for 6 weeks, each em니sion was incubated in 4, 25, 42C incubators and variable circ니a(or which is a이e to vary temperature from -lOtD to 42°C every 3 days. Both UV and fluorescent radiation were applied to each emulsion for 6 weeks to observe the behavior of each emulsion on light.
To lest emulsion types compatible with these extracts, several types of emulsions (o/w, w/o, w/s and multi-phase em니sions) were prepared. To examine thermal stability for 6 weeks, each em니sion was incubated in 4, 25, 42C incubators and variable circ니a(or which is a이e to vary temperature from -lOtD to 42°C every 3 days.
대상 데이터
After examined by NBT test, the subfraction which had the potent activity was concentrated and further purified by flash column chromatography. The compound was named antioxidant B (70mg, 0.07%). The chemical structures of antioxidant A and B were identified using FT-IR, 'H, bC-NMR (DMSO-dQ and UV-V1S spectra.
spontanea Makino^Rosaceae ))12 were selected as final antioxidant materials by screening works. The leaves were collected between October and November in the middle part of South Korea. The 100g of each leaf was extracted with ethanol for 10 days at room temperat니re and each ethanol extract was concentrated in vacuo.
성능/효과
The results, however, are only first tendencies due to the few number of volunteers (n=7). After 56 days, the sample showed a decrease in the number of deep wrinkles for five volunteers out of the seven (71%). Moreover the number of average wrinkles and the total wrinkled surface decreased for four volunteers (57 and 57% respectively).
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