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이희경,최온유,최두복,최현숙,Lee, Hee-Kyung,Choi, On-Yu,Choi, Du-Bok,Choi, Hyun-Suk 한국식품영양학회 2021 韓國食品營養學會誌 Vol.34 No.1
This study was investigated the contents of total polyphenol, flavonoids and antioxidant and antimicrobial activities of Codonopsis lanceolata extracts according to different steaming times. The contents of total polyphenol and flavonoid proportionally increased from 6.45 mgGAE/g to 18.26 mgGAE/g and 2.01 mgRE/g to 6.12 mgRE/g according to ethanol extracts at EDS7. DPPH radical scavenging activity was found to have been 15.26~65.2% and showed the highest level of antioxidant activity at EDS7 was 65.2%. The activity of ABTS radical scavenging and SOD-like activity were also the same result. DPPH and ABTS radical scavenging activity was related to the number of steaming, and the scavenging activity was increased up to 7 times of steaming. The antimicrobial activity of EDS7 had strong antioxidant activity. Antimicrobial activities were examined against 5 microorganisms related to pathogens and food poisoning. The antimicrobial Activity was different depending on the bacteria, but it was effective at the concentration of 300 mg/mL rather than 150 mg/mL. These results showed that Codonopsis lanceolata extracts with a different number of steaming would be conducted to confirm the possibility of developing antimicrobial and antioxidant. It will be helpful in the study of component analysis of Codonopsis lanceolata extracts processed products.
이희경,최온유,최두복,최현숙,Lee, Hee-Gyeong,Choi, On-Yu,Choi, Du-Bok,Choi, Hyun-Suk 한국식품영양학회 2020 韓國食品營養學會誌 Vol.33 No.5
In this study, hot water and ethanol, acetone, and hexane extracts of the steamed Deodeok were investigated for use as raw materials for natural cosmetics. Hot water and ethanol, acetone and hexane extracts of steamed Deodeok did not indicate cell toxicity up to 300 ㎍/mL concentration in the MTT assay. The tyrosinase inhibition effects of the ethanol extract were higher than the ascorbic acid. The efficacy of the steamed Deodeok's ethanol extract on the elastase inhibition was similar to that of quercetin at higher concentrations. In conclusion, water, ethanol, acetone and hexane extracts of the steamed Deodeok indicated strong possibility as a whitening and anti-wrinkle functional cosmetic ingredient. Among them, the steamed Deodeok's ethanol extract, which showed excellent activity, is highly available because it has high safety compared to other organic solvent extraction methods used in cosmetics, and has minimal irritation to the skin.
이희경,최현숙,조기안,최온유,고하영,김란,최두복 조선대학교 공학기술연구원 2017 공학기술논문지 Vol.10 No.1
This research was to study effect of Solanum melongena extract on the xanthine oxidase (XO) inhibitory, nitrite scavenging (NC), and angiotensin I-converting enzyme (ACE) inhibitory activities. All the extracts inhibited the XO and ACE activities in a dose dependent manner. Especially, among various extracts, when 6.0 mg/mL of acetone extract was used, the maximum activity of XO inhibitory was obtained, 65.2%. On the other hand, in the case of methanol and ethanol extracts, they ranged of 61.5 to 62.4%. Acetone extract had a high phenolics and flavonoid concentration compared to other extraxts. Maximum NC activity using hot water extract at pH 1.2 was occurred, 68.7%. ACE inhibitory activity was significantly different among the various extracts at 6.0 mg/mL, values ranged from 35.26 to 56.7%. Especially, when 6.0 mg/mL of methanol and ethanol extracts were used, the highest ACE inhibitory activities were obtained, 57.3 and 56.7%, respectively. These results suggest that XO inhibitory, NC, and ACE inhibitory activities of S. melongena extract were strongly affected by extractant.
이희경,최현숙,조기안,최온유,고하영,김란 한국화장품미용학회 2016 한국화장품미용학회지 Vol.6 No.2
This research is to study effect of polysaccharide obtained from S. herbacea on antioxidant and nitrite scavenging effect. Neutral sugar, uronic acid, and protein concentrations of polysaccharide were 52.68, 0.54, and 7.21%, respectively. Among neutral sugars, glucose and mannose were the major ones of the sugar moiety with molar ratio of 14.52 and 11.28, respectively. The maximum DPPH radical scavenging, hydroxyl radical scavenging, chelating, and hydrogen peroxide scavenging activities at 7 mg/mL were obtained, 69.04, 58.07, 60.21, and 62.54%, respectively. However, in the case of reducing power, it was OD 0.62 at 9.0mg/mL. The maximum nitrite scavenging activity was obtained, 76.77 % at 9 mg/mL and pH 1.5. These results indicate that the polysaccharide obtained from S. herbacea has good potential to be used as a source of materials or additives for oxidation suppressant in food, cosmetics and drug compositions.