• 대한본초학회지
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• 제26권1호
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• pp.59-63
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• 2011

Objectives : Elastic fibers are found in the skin, lungs, arteries, veins and other structures. The defects of elastic matrix aggravate hypertension which is associated with alteration in the great arteries, arteries, and arterioles. The elastase inhibitors were undergoing in clinical studies about emphysema and pulmonary hypertension. This study was designed to investigate the effect of Astragali Radix extracts (AR) on elastase activity and anti-oxidative effects. Methods : The elastase inhibitory activity and DPPH (1,1-diphenyl-2-picrylhydrazyl) and NO free radical scavenging activities of AR were measured. Results : The elastase activity was significantly inhibited by AR. The significant DPPH and NO free radical scavenging activities were observed in AR as well. Conclusion : AR showed the anti-elastase effects and anti-oxidative activities in vitro. These results suggest that AR may be a possible drug for the treatment of pulmonary emphysema and pulmonary hypertension.

• 한국환경과학회지
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• 제31권8호
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• pp.715-725
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• 2022

Lactic Acid Bacteria (LAB) are among the representative probiotics that have been used for a long time in fermented food. Although there are many studies on detecting the radical scavenging activity of LAB, few studies have been conducted on the environmental factors that improve scavenging activity. This study investigated the environmental factors affecting the DPPH radical scavenging and various antioxidant activities of Kimchi-derived Lactobacillus plantarum K-21 with antihypertensive and radical scavenging activities. The optimal conditions for scavenging DPPH radicals were glucose 2%, bactopeptone 0.5%, Tween 80 0.05%, L-cysteine 0.05%, and an initial pH 6.5 at 35℃. Under optimal conditions, the DPPH radical scavenging activity was 94.8±2.2%, which was 1.5 times higher than that of the basic medium. In addition, L. plantarum K-21 had other antioxidant activities; ABTS radical scavenging (93.6±1.5%), hydroxyl radical scavenging (8.5±0.9%), metal chelating (65.9±0.5%), NO scavenging (53.1±19%), SOD-like (25.1±1.5%), and reducing power (11.7±1.4%) activities were detected. Therefore, L. plantarum K-21 may act not only as a starter for lactic acid-fermented foods with improved functionality but also as a drug for various diseases caused by oxidative stress.

• 한국산학기술학회논문지
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• 제16권8호
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• pp.5343-5350
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• 2015

본 연구의 목적은 대나무 줄기표면에서 처음 발견 하였으나, 아직까지는 연구가 미흡한 신 균주 Bacillus amyloliquefaciens NBF11-1의 생리활성 효과를 알아보기 위하여 청국장 전통 발효 균주인 Bacillus subtilis NG24를 대조군으로 하여 항산화효과에 대한 비교분석을 실시하였다. 청국장 추출물의 항산화 실험 결과에서 Total Polyphenol 추출물 함량의 측정 결과는 B.subtilis NG24에 비해 B.amyloliquefaciens NBF11-1 시료에서 유의하게 증가하였다(p=0.032). SOD 유사활성과 DPPH radical 소거능 및 NO radical 소거능에서 B.subtilis NG24에 비해 B.amyloliquefaciens NBF11-1을 포함한 시료에서 농도가 증가함에 따라 유의하게 증가하였다(p<.05). 추가적으로, 각 항산화 실험의 $IC_{50}$은 B.subtilis NG24에 비해 B.amyloliquefaciens NBF11-1 시료에서 SOD 유사활성(p=0.045), DPPH radical 소거능(p=0.041), NO radical 소거능(p=0.019)과 같이 유의한 차이로 감소하였다.

• Advances in Traditional Medicine
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• 제8권4호
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• pp.329-338
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• 2008

The aim of the study is to investigate the antioxidant activity through, reducing power, 2, 2-diphenyl-1-picryl hydrazyl radical (DPPH), nitric oxide radical (NO), superoxide radical, hydrogen peroxide radical ($H_2O_2$) scavenging activity and the amount of total phenolic compounds of chloroform, ethyl acetate, methanol and aqueous extracts of the leaves of Talinum portulacifolium. Chloroform extract of leaves of T. portulacifolium showed highest antioxidant activity, with a direct relationship between activity and concentration of extracts ($15-240\;{\mu}g/mL$). Among all the extracts, the highest amount of the total polyphenolic compounds was found in the chloroform extract. Chloroform extract of T. portulacifolium showed an important free radical scavenging activity towards the DPPH, NO, Superoxide and $H_2O_2$ radicals, with $IC_{50}$ values of 133.26, 165.75, 156.34 and $135.29\;{\mu}g/mL$, respectively. In the lipid peroxidation assay, extracts of chloroform and ethyl acetate showed a remarkable inhibitory activity. The extracts showed significant activity in all the experiments but lower than the standard antioxidant, ascorbic acid.

• 한국식생활문화학회지
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• 제31권5호
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• pp.481-488
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• 2016

The objective of this study was to investigate the antioxidant and anti-inflammatory activities of Eugenia caryophyllata Thunb. water and 70% ethanol extracts. The content of total polyphenol was significantly higher in water extract than in 70% ethanol extract. The DPPH radical scavenging activity of water extract was similar to that of Vit. C at a concentration of $1,000{\mu}g/mL$. The ABTS radical scavenging activities of water and 70% ethanol extract were similar to that of Vit. C at a concentration of $1,000{\mu}g/mL$. SOD-like activity of water extract was higher than that of 70% ethanol extract at a concentration of $1,000{\mu}g/mL$ but lower than that of Vit. C. The DPPH radical scavenging activity, ABTS radical scavenging activity, and SOD-like activity increased as concentrations of water and 70% ethanol extracts increased. Cell cytotoxicity was not observed at all concentrations except at $100{\mu}g/mL$ concentration of water extract. Inhibitory activity on NO production effect of water extract was significantly higher than that of 70% ethanol extract. These results show that E. caryophyllata Thunb. has potent biological activities, and their activities were different depending on extraction solvent.

• 동의생리병리학회지
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• 제22권5호
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• pp.1158-1162
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• 2008

In genus Angelica, three species have been used and cultivated for medical material in orient, A. gigas in korea, acutiloba in Japan and sinensis in China. The plant material of Angelica spp. is used for the treatment of women's disease as a hematic. The extracts from A. gigas and acutiloba were fractionated aqueous partitions. And study was performed to examine DPPH scavenging activities, BSA degradadion, anti-apoptosis and NO scavenging. DPPH radical scavenger activity was measured by DPPH method, it was shown dose-dependently effect. and BSA degradadion was shown same result. Treatment of cells with hydrogen peroxide, a reactive oxygen species was to indiced cell death and pretreatment with Angelica gigas and angelica acutiloba extract attenuated the occurrence of $H_2O_2$-induced cell death. In vitro nitric oxide (NO) scavenging effect on Angelica gigas and angelica acutiloba extracts. All extracts effectively reduced the generation of NO radicals in a dose-dependant manner.

• 생명과학회지
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• 제29권4호
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• pp.428-435
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• 2019

알래스카 산 대구(Gadus chalcogrammus)는 대구과(family Gadidae)의 해산어종이다. 알래스카 명란 원료, 고추장 명란, 발효 명란을 증류수와 에탄올로 추출하여 2, 2- diphenyl - 1- picrylhydroazyl (DPPH), 하이드록시 라디칼(OH), 산화질소(NO)의 항산화 소거능을 평가하였다. 철 이온 환원력(FRAP)을 조사하였다. ABTS+ 소거능은 Brand-Williams 등의 방법에 따랐다. 고추장 명란의 증류수 추출물의 DPPH 소거능은 1.0 mg/ml 농도에서 71.9%였으며 에탄올 추출물에서 소거능은 73.7%였다. 발효 명란의 증류수 추출물의 DPPH 소거능은 1.0 mg/ml 농도에서 78.0%였고 에탄올 추출물에서 소거능은 78.4%였다. 명란 원료의 증류수 추출물과 에탄올 추출물의 DPPH에 대한 최소 저해 농도 값($IC_{50}$)은 각각 11.65 ug/ml과 11.47 ug/ml이었다. 명란 원료, 고추장 명란, 발효 명란의 에탄올 추출물의 OH 소거능은 1.0 mg/ml 농도에서 70.9%, 79.0, and 80.6%였다. 명란 원료의 증류수 추출물과 에탄올 추출물의 NO의 최소 저해 농도 값은 11.45 ug/ml과 11.41 ug/ml였다. 본 연구 결과, 고추장 명란과 발효명란은 원료 명란 보다 높은 DPPH, OH, NO 소거능을 나타내었다. 고추장 명란과 발효 명란은 자연 라디칼 소거능이 있어 식품으로써 항산화 보충제가 될 수 있을 것이다.

• 한국응용과학기술학회지
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• 제36권1호
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• pp.13-22
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• 2019

울금(Curcuma longa L.)의 산화억제 및 질소산화물 소거활성 등 기능성 소재로서 활용 가능성을 검토한 결과, 프로안토시아니딘(proanthocyanidin) 함량은 $69.000{\pm}2.737mg$ catechin equivalents (CE)/g dry weight으로 확인되었으며, 증류수(distilled water, DW), 70% 에탄올 및 노르말 부탄올(n-butanol)의 3가지 용매를 사용한 추출 수율은 DW (17.11%), 70% 에탄올(15.26%), 노르말 부탄올(4.12%) 순으로 관찰되었다. 총 플라보노이드(total flavonoid) 함량은 DW, 70% 에탄올 및 노르말 부탄올에서 각각 0.032, 0.512 및 2.221 mg quercetin equivalents (QE)/g의 함량으로 나타났고, 노르말 부탄올에서는 유의적인 차이를 보이며 높게 관찰되었다(p<0.05). Nitric oxide (NO) 라디칼 소거 활성은 농도 별(0.2~0.8 mg/mL) DW에서 15.64~26.20%, 70% 에탄올 10.52~20.76%, 노르말 부탄올에서 13.39~69.92%로 확인되었다. Nitrite ($NO_2$) 소거활성은 DW 및 70% 에탄올과 비교하였을 때 노르말 부탄올에서 강한 $NO_2$ 소거활성을 보였다. ${\beta}$-carotene 탈색 저해활성은 DW에서 8.81~25.93%, 70% 에탄올 1.20~20.20%, 노르말 부탄올 12.08~43.93%로 나타났다. 지질과산화 저해활성은 DW, 70% 에탄올 및 노르말 부탄올에서 각각 5.60~27.54%, 37.78~50.79% 및 41.79~46.39%로 동정되었다. 이에, 천연 항산화제 등 기능성 소재로서의 활용 가능성이 있을 것으로 사료된다.

• 한국약용작물학회지
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• 제24권4호
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• pp.303-308
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• 2016

Background: This study aimed to investigate the antioxidat and antimicrobial activities of the methanol extract and its fractions prepared from the roots of Sanguisorba officinalis L. Methods and Results: The antioxidant activities were compared by evaluating the DPPH radical and nitric oxide (NO) scavenging ability. Measurement of DPPH radical scavenging ability showed that the $SC_{50}$ values of the ethyl acetate fraction was $3.85{\mu}g/m{\ell}$. The ethyl acetate fraction exhibited the most effective DPPH radical scavenging ability compared with the other samples. As for the NO scavenging ability, at all tested concentrations, the ethyl acetate fraction showed a higher scavenging activity than that of the extract and other fractions. These results are related to the total phenolic compound and flavonoid contents of the ethyl acetate fraction. Antimicrobial activity against foodborne pathogens was investigated using the disc diffusion assay. The ethyl acetate fraction showed the highest antimicrobial activity against gram-positive Staphylococcus aureus and Bacillus cereus. However, the chloroform fraction had a higher antimicrobial activity against gram-negative Vibrio vulnificus than that of the extract and other fractions. Conclusions: The results show that the ethyl acetate fraction had a higher antioxidant as well as antimicrobial activity, than did the other samples. Therefore, the ethyl acetate fraction has potential application in the food industry.

• Journal of Acupuncture Research
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• 제20권4호
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• pp.42-52
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• 2003

Objective: For designing an optimal countermeasure against ageing and ageing related disease, it is necessary to understand the ageing mechanism and other reactive species. Free radicals are associated with the mechanisam of biological ageing and age-related diseases. This study was performed to identifiy the scavenging effect of Radix Cynanchi Wilfordii Herbal-Acupunture Solution(RCWHA) on Nitric Oxide(NO), 1, 1-diphenyl-2-picryl-hydrazyl(DPPH) and Interleukin-4(IL -4). Methods: The activity to scavenge DPPH radicals and NO was observed in vitro, We evaluated the antioxidant activity of RCWHA by using DPPH or NO free radical method. Also the inhibitory effect on IL-4 in RCWHA was observed in vitro, Results: The followings are the summary of the results; (1) There is a significant scavenging effect of RCWHA on NO in 0.1mg/ml and 10mg/ml group after 24hrs. (2) There is no significant scavenging effect of RCWHA on DPPH. (3) There is a significant scavenging effect of RCWHA on IL-4 in $10{\mu}g/m{\ell}$ and $100{\mu}g/m{\ell}$ group. Conclusions: These findings indicate that RCWHA can be used as antioxidant or antiimflamatory drug. But further study is needed about the effect of RCWHA.