• 한국응용과학기술학회지
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• 제33권3호
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• pp.474-482
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• 2016

The black raspberry (Rubus coreanus Miquel) contains anthocyanin, tannins, gallotannin, gallic acid, ferulic acid and phenolics. It brightens the eyes and protects the liver and kidneys. It was effective for anti-aging. Thus, the purpose of this study was to inform the excellence of black raspberry and to screen antioxidant activity to ensure the possibility as a functional material. In this study, bioactive compounds in black raspberry were determined. Additionally, black raspberry was extracted by CM (chloroform:methanol, 2:1, v/v), 70% methanol and 70% ethanol, and were investigated and compared in vitro methods. Total phenol and flavonoid contents were measured to compare each different solvents. In addition, DPPH radical scavenging activity and ABTS radical scavenging activity, ferric reducing antioxidant power, reducing power were determined to measure the antioxidant activity. The results were the highest in 70% ethanol extracts, and the higher the concentration showed a significantly higher antioxidant capacity. When observed the relationship between the study, antioxidant activity of black raspberry was supposed to affect by the anthocyanin, phenol and flavonoid contents.

• 대한본초학회지
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• 제32권5호
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• pp.19-25
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• 2017

Objective : The Sinseon-yukza-hwan (SSY), a Korean medicinal formula which includes Radix Rehmanniae Preparata and other medicinal herbs, has long been used for treatment of alopecia and gray hair through oral administration. This study is designed to enhance the utilization of natural materials in hair and scalp-related cosmetics. Possibility of SSY as an antioxidant was examined from its 50% ethanol extract. Methods : The antioxidative capacities were evaluated by determining total phenolic and flavonoid contents, 1,1-diphenyl-2-picryl hydrazyl (DPPH), 2'-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) (ABTS), reducing power and hydroxyl radical scavenging activity. Results : Total polyphenol and flavonoid contents of SSY were 25.53 mg TE, tannic acid equivalent/g and 18.90 mg RE, rutin equivalent/g, respectively, which correlated strongly its antioxidative activity. The DPPH and ABTS free radical scavenging activities of SSY at $0.1mg/m{\ell}{\sim}5mg/ml$ were ranged from 20% to 85% and 10% to 58%, respectively. Also the hydroxyl radical scavenger activity and reducing power increased in SSY-treated group, which were significantly lower in SSY-compared to BHA-treated group. But the highest reducing power was shown as 79% from SSY-treated group, which was higher value than 65% from BHA-treatment. These results showed that SSY extract effectively inhibited the generation of free radicals in the all assay system with dose-dependent manners. Conclusions : Thus, the present study provide preclinical data to support the expanded application of SSY, which could be potential candidates for natural antioxidants.

• 한국약용작물학회:학술대회논문집
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• 한국약용작물학회 2011년도 추계학술발표회
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• pp.312-313
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• 2011

• 한국환경과학회지
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• 제23권7호
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• pp.1233-1239
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• 2014

Watermelon (Citrullus vulgaris L.) is a summer fruit typical to help fatigue systemic absorption is getting better. The goal of this study is to screen antioxidant activity to ensure the possibility as a functional material for exocarp of watermelon. Watermelon was extracted with 70% methanol, 70% ethanol, chloroform:methanol (CM, 2:1, v/v). Total phenol contents were 12.01 mg/g, 8.89 mg/g, 3.53 mg/g in the 70% methanol, 70% ethanol, CM, in that order, respectively. Total flavonoid content, DPPH radical scavenging activity, ABTS radical scavenging activity, ferric reducing antioxidant power (FRAP), ${\beta}$-carotene bleaching assay were 70% methanol extract remarkably higher than the other extracts. And these results showed the same trend of total phenol content. From the above results shows that watermelon was effective on the antioxidative activity.

• 생약학회지
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• 제40권1호
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• pp.1-5
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• 2009

The antioxidant and anti-diabetes effects were evaluated by the ethanol extracts from Astragalus membranaceus root classified by years using through DPPH radical scavenging activity, hydroxyl radical (${\cdot}OH$) scavenging activity, total phenolic and flavonoid contents, reducing power activity, $\alpha$-amylase and $\alpha$-glucosidase inhibitory activities. $IC_{50}$ values for DPPH radical scavenging activity of ethanol extract from 6 years old root ($749.25{\mu}g/mL$) was higher than 1 year ($1452.67{\mu}g/mL$) and 3 years old root ($1095.61{\mu}g/mL$). 6 years old root showed better effects in ${\cdot}OH$ scavenging activity ($IC_{50}$: $10.58{\mu}g/mL$), reducing power, total phenolic contents ($26.13{\pm}0.79\;Tan\;{\mu}g/mg$, $24.03{\pm}0.74\;Cat\;{\mu}g/mg$) $\alpha$-amylase ($33.33{\pm}0.55%$) and $\alpha$-glucosidase inhibitory activity ($49.71{\pm}1.01%$). On the other hand, total flavonoid compound contents were estimated much higher in 1 year old root ($44.93{\pm}1.35\;Que\;{\mu}g/mg$, $70.32{\pm}2.03\;Rut\;{\mu}g/mg$) than others. Based on these results, It was suggested that 6 years old root of A. membranaceus has a potential candidate for functional cosmetic and medicine.

• 대한본초학회지
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• 제32권3호
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• pp.29-36
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• 2017

Objectives : In order to investigate the possibility of Sorbus commixta Heal. stem (SC) as a natural material, antioxidant activities of the hot water and ethanol extracts were examined. Methods : The samples of SC were pulverized, and fractions were extracted repeatedly three times from hot water and 70% ethanol at room temperature for 2 hours. The antioxidant activities were analyzed from total polyphenol, flavonoid contents, DPPH, ABTS, hydroxyl radical, $Fe2^+$ chelating, and nitrite scavenging activity. Results : Total polyphenol contents were significantly higher in ethanol extract group ($504.39{\mu}g/m{\ell}$) than in hot water extract group ($364.64{\mu}g/m{\ell}$). Total flavonoid contents were also significantly higher in ethanol extract group ($160.09{\mu}g/m{\ell}$) than in hot water extract group ($124.59{\mu}g/m{\ell}$). DPPH, ABTS, $Fe2^+$ chelating were slightly higher in ethanol extract gorups than in hot water extract groups, and increased in a dose-dependent manner. The hydroxyl radical scavenging activity (18.42~23.61%) of ethanol extract groups were shown to be approximately twice higher than that (7.63~10.37%) of hot water extract groups at $12.5{\sim}50{\mu}g/m{\ell}$ concentration. Nitrite scavenging activities of both ethanol and hot-water extract groups were shown to be higher in a dose dependent manner at the concentration of $12.5{\sim}50{\mu}g/m{\ell}$ at pH 3.0 than at pH 1.2, and ethanol extract groups (86.55~96.64%) had higher activity than the hot water extract groups (42.59~92.63%), which was higher than that of the control group antioxidant BHT (72.96~80.11%). Conclusions : The extracts of SC displayed antioxidant activities which suggested a natural material can be developed to functional material.

• Journal of Applied Biological Chemistry
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• 제60권4호
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• pp.307-311
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• 2017

본 연구는 제주 동백나무 어린 잎 메탄올 추출물과 에탄올 추출물의 페놀류 함량 및 항산화 활성에 대한 연구를 진행하였다. 메탄올 추출물과 에탄올 추출물의 총 폴리페놀과 플라보노이드 함량은 각각 74.9과 46.1 mg GAE/100 g 및 30.6과 21.4 mg RE/100 g이었다. 또한 추출물들은 DPPH, superoxide와 nitric oxide 라디컬 소거능, chelating 및 환원력을 가지는 것으로 나타났다. 이 결과들로 동백나무 어린 잎이 높은 항산화 효능을 가지고 있음을 알 수 있었으며, 차후 기능성 식품 및 약물 소재로서의 가능성을 검토할 필요가 있다.

• 한국식품저장유통학회지
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• 제17권6호
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• pp.867-873
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• 2010

본 실험에서는 꽈리를 열매, 꽃받침, 잎, 줄기, 뿌리 등 부위별로 구분하여 메탄올로 추출하고 추출 수율, 총페놀 함량, 총플라보노이드 함량, DPPH radical 소거능, 아질산염 소거능, superoxide anion radical 소거능, 환원력, 철 이온에 대한 킬레이트 효과 등을 측정하였다. 추출 수율은 열매가 가장 높았고 그 다음으로 꽃받침, 잎, 줄기, 뿌리 순이었다. 총페놀 및 총플라보노이드 함량은 잎 추출물이 가장 높았고 그 다음으로 꽃받침 추출물이었다. DPPH radical 소거능은 1 mg/mL 및 5 mg/mL의 농도에서 잎 추출물이 가장 높았고 꽃받침 추출물도 높은 활성을 나타내었다. 아질산염 소거능은 모든 부위에서 농도에 따라 유의적인 차이 없이 높게 나타났다. 꽈리 추출물의 superoxide anion radical 소거능은 꽃받침과 잎 추출물이 높은 활성을 나타내었다. 환원력은 잎 추출물에서 가장 높게 나타났고 철 이온에 대한 킬레이트 효과는 꽃받침, 줄기 및 뿌리 추출물이 높은 활성을 나타내었다. 이상의 결과를 종합하여 보면 꽈리의 잎 추출물에서 총 페놀 함량, 총플라보노이드 함량과 항산화 활성이 탁월하게 높게 나타났고 그 다음으로 꽃받침 추출물이 우수한 항산화 활성을 나타내어 향후 이를 이용한 천연 항산화제로 개발 가능성이 시사되었다.

• 한국식품조리과학회지
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• 제31권1호
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• pp.91-97
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• 2015

The present study was performed to investigate antioxidant and anti-colon cancer activities of red cabbage (Brassica oleracea L. var. capitata f. rubra DC) according to the cooking conditions (raw, microwave, blanching and steaming). The contents of red cabbage extracts were determined as follow: total phenolic contents, 2,2-diphenyl-1-picrylhydrazyl (DPPH), 2,2-azino-bis-(3-ethy lbenzo-thiazoline-6-sulfonic acid) (ABTS), 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide (MTT) assay, western blot analysis. The total contents of polyphenol and flavonoid of red cabbage were 20.27 mg GAE/g Dry weight ${\pm}0.03$ and $2.55{\pm}0.02mg$ RE/g Dry weight. In this study, the total contents of polyphenol were decreased to both microwave and steam cooking. Total antioxidant activity and growth inhibition of HCT116 human colon cancer cells were in the order of raw > microwaving > steaming cooking methods. These results indicate that red cabbage extracts might have antioxidant and anti-proliferative activity according to the cooking conditions.

• 한국식품과학회지
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• 제44권3호
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• pp.337-342
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• 2012

본 연구에서는 전통적으로 약으로써 이용되었거나 민간요법으로 사용되던 식물을 문헌고찰을 통해 40여종(자생식물 26종과 생약식물 14종)을 선발하여, 폴리페놀과 플라보노이드 함량 측정 및 DPPH 라디칼 소거능을 측정하였다. 자생식물인 비수리의 폴리페놀(228.90 mg/g extract)과 플라보노이드 함량(90.15 mg/g extract)이 가장 높았으며, DPPH 라디칼 소거능(75.69%)이 모두 높게 나타났다. 감나무와 관중의 폴리페놀 함량(감나무 112.98 mg/g extract, 관중 121.46 mg/g extract)과 플라보노이드 함량(감나무 46.10 mg/g extract, 관중 58.69 mg/g extract)은 높은 편은 아니었으나, DPPH라디칼 소거능은 각각 72.87%와 79.50%로 가장 높게 나타났다. 생약식물에서는 삼백초의 총 폴리페놀함량이 194.60 mg/g extract, 애엽이 203.93 mg/g extract로 폴리페놀 함량이 높았으며, DPPH 라디칼 소거능(삼백초 66.27%, 애엽 66.22%) 또한 높게 나타났다. 그러나 삼백초와 애엽을 제외한 12종류의 생약식물의 DPPH 라디칼 소거능이 50% 미만인 것으로 조사되었다. 최근에 다양한 자생식물과 약용식물의 폴리페놀, 플라보노이드 함량 및 기능성 탐색에 대한 연구가 많이 진행되고 있지만, 아직까지도 연구되지 않은 무수히 많은 식물 소재들이 많아서 지속적인 연구가 필요하다. 본 연구 결과, 그 동안 대중화 되어있지 않았던 식물 소재들의 기능성 소재로의 가능성이 새롭게 조명 될 수 있을 것으로 사료되며 이와 관련된 의약품, 미용제품 및 건강보조식품 등의 개발에 기초자료로 이용될 수 있을 것으로 기대된다. 향후 본 연구에서 조사한 자생식물과 생약식물 중 총 폴리페놀함량과 플라보노이드 함량이 높고, DPPH 라디칼 소거능이 뛰어나게 나타난 몇몇 식물에 대한 심도 있는 연구가 필요할 것으로 판단된다.