• 대한본초학회지
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• 제33권6호
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• pp.1-8
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• 2018

Objectives : Herbal medicinal mixture (JMB) are consisted of Caryophylli Flos, Aucklandiae Radix and Angelicae Dahuricae Radix. Each of herbal medicines has studied on anti-oxidant effect. So this study was conducted to investigate efficacy and potency of JMB on anti-oxidation. Methods : The JMB was extracted at room temperature by 80% ethanol. And total polyphenol contents, total flavonoid contents in JMB ethanol extract were determined by colorimetric method. Also, DPPH, ABTS free radical scavenging capacity and reducing power of JMB ethanol extract were measured at 100, 500, 1000, $5000{\mu}g/m{\ell}$ concentrations by spectrometric assay. Positive control was used BHA (butylated hydroxyanisole). Results : The total polyphenol contents and total flavonoid contents of the extract were 55.38 mg/TAEg, 513.72 mg/RUEg, respectively. Also, DPPH free radical scavenging capacity and reducing power of JMB ethanol extract in treated concentrations (100, 500, 1000, $5000{\mu}g/m{\ell}$) increased dose dependently. In particular, DPPH free radical scavenging capacity of JMB ethanol extract at 500, 1000, $5000{\mu}g/m{\ell}$ was similar to positive control (BHA) at high concentration (50, $100{\mu}g/m{\ell}$). ABTS free radical scavenging capacity of JMB ethanol extract at 500, 1000, 5000 ug/ml was similar to BHA at high concentration (50, $100{\mu}g/m{\ell}$). Also, reducing power was showed that JMB ethanol extract at $5000{\mu}g/m{\ell}$ was similar to BHA at high concentration (50, $100{\mu}g/m{\ell}$). Conclusions : These results suggest that JMB ethanol extract has effects to scavenge free radicals. Therefore, JMB has potential and applicable benefits for development of materials and products to have anti-oxidation functions.

• 한국융합학회논문지
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• 제7권3호
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• pp.53-58
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• 2016

본 연구의 목적은 glutamic acid, linoleic acid, 연밥의 ethyl acetate 조추출물 및 ethyl alcohol 조추출물의 항산화효과를 알아보고자 하였다. 항산화능을 알아보고자 DPPH 라디칼 소거능, 지질과산화능 및 슈퍼옥사이드 디스뮤타제 유사활성을 측정하였다. Glutamic acid, linoleic acid, 연밥의 ethyl acetate 조추출물 및 ethyl alcohol 조추출물은 농도 의존적으로 DPPH 라디칼 소거능과 슈퍼옥사이드 디스뮤타제 유사활성을 증가시켰다. Glutamic acid, linoleic acid, 연밥의 ethyl acetate 조추출물 및 ethyl alcohol 조추출물은 대조군의 지질과산화의 증가에 비하여 시간 경과에 따른 반비례 양상으로 지질과산화가 감소하였다. 이상의 결과에서 연밥의 조추출물은 우수한 항산화능 물질이 존재 할 가능성을 제시하며 융합 연구를 통한 노화 방지 관련 의약품 개발 등에 응용되어질 수 있다.

• Food Science and Biotechnology
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• 제16권6호
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• pp.1041-1045
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• 2007

Heated onion juice was partitioned using the solvents hexane, chloroform, ethyl acetate, and butanol. The ethyl acetate fraction showed the strongest scavenging effect on the ABTS radical. The antioxidant activities of the ethyl acetate fraction from raw and heated onion (120, 130, and $140^{\circ}C$) were evaluated using radical scavenging assays. Radical and nitrite scavenging activities were higher in heated onion than raw onion, and the higher the temperature of heat treatment, the greater the radical and nitrite scavenging activities. Heated onion ($140^{\circ}C$, 2 hr) was more effective than raw onion, having higher DPPH radical scavenging (5.7-fold), hydroxyl radical scavenging (6.4-fold), superoxide radical scavenging (2.3-fold), hydrogen peroxide scavenging (11.8-fold), and nitrite scavenging (4.3-fold) activities. Onion increased its physiologically active materials after heating, and in this regard, heated onion can be used as biological material for the manufacture of health foods and supplements.

• 한국자원식물학회:학술대회논문집
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• 한국자원식물학회 2012년도 정기총회 및 춘계학술발표회
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• pp.18-18
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• 2012

Antioxidant is an important role to protect the human body against damage by reactive oxygen species. However, the excessive intake of such antioxidant is known to cause a serious poisonous influence on one's liver, lungs and circulating system. Therefore, it is necessary to develop a safe natural antioxidant. For the purpose of developing natural antioxidant and antibacterial, the antioxidant activity and antibacterial effects of various extract solvents from Artichoke (Cynara Scolymus L.) leaf were determined. In this study, the extracts of Artichoke leaf dried from solvent extraction were examined by means of DPPH free radical scavenging activity and ABTS free radical scavenging activity. The effect of free radical scavenging compared with $\alpha$-tocopherol and L-ascorbic acid. In Artichoke leaf extract, evaluated by using DPPH and ABTS showed that the highest antioxidant activities were found to be in methanol extracts from DPPH radical ($IC_{50}$: $20.06{\mu}g\;mL^{-1}$), ABTS radical ($IC_{50}$: $16.01{\mu}g\;mL^{-1}$) and followed by ethanol > methyl chloride > ethyl acetate > n-Hexane. By using disc diffusion method, the antibacterial activity showed that the Artichoke leaf extract was found to be most effective against all of the tested organisms and the methyl chloride extract showed the most significant antibacterial effect against all of tests among 5 solvents extract, followed by ethyl acetate > n-Hexane > ethanol > methanol. As a result, optimal in antioxidant activity for Artichoke (Cynara Scolymus L.) leaf is methanol extract and for antibacterial effect is Methyl Chloride extract.

• 생약학회지
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• 제38권3호통권150호
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• pp.263-269
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• 2007

Nelumbo nucifera (Nymphaeaceae) has been widely used in a traditional oriental medicine to treat bleeding, fever, diarrhea, hemorrhoid, sunstroke, dysentery and dizziness. The leaves of this plant were refluxed with methanol, and then fractionated with organic solvents to screen the antioxidant activity using DPPH radical. Ethyl acetate and n-butanol fractions showed good DPPH radical scavenging effects and were carried out column chromatographies to isolate nine compounds. Their chemical structures were characterized as p-hydroxybenzoic acid (1), uracil (2), luteolin (3), quercetin $3-O-{\beta}-D-glucopyranoside$ (4), $rhamnetin 3-O-{\beta}-D-glucopyranoside$ (5), $isorhamnetin 3-O-{\beta}-D-glucopyranoside$ (6), $quercetin 3-O-{\beta}-D-glucuropyranoside$ (7), $quercetin 3-O-{\beta}β-D-xylofuranosyl(1{\rightarrow}2)-{\beta}-D-galactopyranoside$ (8), and adenine (9) by comparison NMR spectral data and with those in references. Compounds 1, 2, 5 and 9 were firstly isolated from this plant. Compounds 1, 3 and 4 showed potent DPPH radical scavenging activity. Especially, compound 3, luteolin showed the higher effect than ascorbic acid used as a positive control.

• 대한한의학방제학회지
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• 제15권2호
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• pp.139-145
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• 2007

The purpose of this study was to investigate the anti-oxidant effect of Cynomorium songaricum. The extract of Cynomorii Herba was studied for diphenyl-picryl-hydrazyl (DPPH) radical scavenging activity, HepG2 cell viability and $H_2O_2$-induced cytotoxicity by a modified MTT assay. DPPH radical scavenging activity was measured after 30 minutes. The extract was tested by 1. 5, 10, 50, 100 and 500 ${\mu}g/ml$ concentrations. HepG2 cell viability by a modified MTT assay was measured in the concentrations of 10, 50, 100, 250, 500 ug/ml for 24 h. The results showed that the extract scavenged DPPH radical up to 52.2% with 50 ug/ml concentration. The extract did not reduced the cell viability and $H_2O_2-induced$ cytotoxicity (69.4%) was blocked by the extract in the concentrations of 50, 100, 250 and 500 ${\mu}g/ml$. In conclusion, the extract of Cynomorii Herba has potent antioxidant activity.

• 한국식품과학회지
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• 제47권2호
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• pp.254-260
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• 2015

본 연구는 전라남도 대표 과일인 나주 신고배를 대상으로 배과피를 분리 건조한 후 용매에 따른 배 과피의 생리 활성을 비교하고자 하였다. 시료는 과피를 1.5 mm의 일정한 두께로 분리해낸 후, 가장 일반적으로 사용되고 있고, 건조온도를 조절할 수 있는 열풍건조법을 이용하여 6시간 동안 60oC에서 건조시켰다. 열풍건조 시킨 시료를 분쇄기로 분쇄하였고, 3가지 용매인 물, 80% ethanol, 80% methanol로 추출하여 실험을 진행하였다. 총 페놀 함량측정에서는 물 추출물에 비해 80% ethanol과 80% methanol 추출물에서 유의적인 차이를 보였으며, 80% methanol 추출물이 43.76 mg QE/g으로 3가지 용매 중 가장 많은 양의 총 페놀 함량을 함유하고 있음을 확인할 수 있었다. 또한, 플라보노이드 함량측정에서는 80% ethanol 추출물이 28.51 mg QE/g으로 가장 높은 수치를 보였다. Radical 소거 활성에 대한 항산화실험은 DPPH radical scavenging, ABTS radical scavenging, 환원력 실험을 통해 이루어졌다. 먼저, DPPH와 ABTS에 대한 radical 소거 활성에서는 모두 물 추출물에서 높았으며, 각각 3.57, 44.14 Mg TEAC/g의 값을 보였고, DPPH radical 소거 활성실험에서는 각 용매사이에서 유의적인 차이(p<0.05)를 보였다. 반면, 환원력에서는 80% methanol 추출물에서 197.46 Mg TERP/g으로 가장 높았고, 물 추출물에서 79.62 Mg TERP/g으로 가장 낮은 결과를 보였으며, 각 용매사이에서 유의적인 차이(p<0.05)를 보였다. ${\alpha}$-glucosidase 저해효과에서는 80% methanol 추출물이 91.75%로 가장 높은 수치를 보였고, 물 추출물에서 83.04%의 가장 낮은 저해효과를 보였으며, 두 용매 사이에서 유의적인 차이(p<0.05)를 확인할 수 있었다. 또한 알코올 분해능 활성은 전체적으로 좋은 편이였으나 그 중 물 추출물이 173.32%로 가장 높은 활성을 나타냈다. 그리고 항균실험에서는 B. cereus, E. coli, P. aeruginosa 에서 모두 항균성이 있는 것으로 나타났다. 결과적으로 본 실험에 사용된 3가지 용매 중 물 추출물은 DPPH radical 소거활성, ABTS radical 소거활성, 알코올 분해능에서 높은 효과를 보였으며, 80% ethanol 추출물은 플라보노이드 함량이 높게 나타났다. 80% methanol 추출물에서는 총 페놀 함량, 환원력, ${\alpha}$-glucosidase에서 효과를 보였다. 따라서, 배 과피에서 활용하고자 하는 생리 활성에 따라 본 실험 결과를 응용하여 적합한 추출용매를 선택하면 목적하는 생리 활성의 효능을 높일 수 있을 것으로 기대된다.

• Archives of Pharmacal Research
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• 제17권6호
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• pp.462-466
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• 1994

Radical scavenging principles on 1, 1-diphenyl-2-picylhydrazyl(DPPH) radical were isolated from the seeds of Cassis tora L. Assignments of the^1H-{\;}and{\;}^{13}C-NMR$ data showed the active components to be an anthraquinone, alatemin nad two naphthopyrone glycosides, nor-rubro-fusarin-6-.betha.-D-glucoside(cassiaside) and rubrofusarin-6- -D-gentiobioside. Altemin showed more potent radical sacvenging effect than the others.

• 한국식품영양학회지
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• 제35권5호
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• pp.313-323
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• 2022

To investigate antioxidant effects of tea tree root extracts using various extraction methods, cytotoxicity, DPPH and ABTS radical scavenging, SOD, nitrite scavenging activity and inhibitory activity of lipid peroxidation, reducing power, ferrous ion chelating activity were measured. Cytotoxicity for RAW 264.7 cells was not observed at concentrations treated with below 90 ㎍/mL in all extracts. The maximum DPPH radical, nitrite scavenging, SOD activity and inhibitory activity of lipid peroxidation were obtained at the ethylacetate and 70% ethanol extract. The maximum ABTS radical scavenging activity was obtained at the ethylacetate and hot water extract. However, in the case of reducing power and ferrous ion chelating activity, they were obtained at 70% ethanol and hexane extract, respectively. Nitrate scavenging activity showed the most excellent scavenging ability of 59.6% at 90 ㎍/mL of ethylacetate. The hexane extract had the highest ferrous ion chelating activity, showing 61.05% at 50 ㎍/mL, 66.07% at 70 ㎍/mL and 76.81% at 90 ㎍/mL, respectively. The results of this research show that the ethylacetate and 70% ethanol extracts of tea tree root can be used as a natural material for scavenging the radicals. However, future study is necessary to understand the mechanism of antioxidant activity by identification of substances.

• 한국식품영양과학회지
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• 제38권1호
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• pp.19-24
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• 2009

식용 및 약용으로 예로부터 널리 이용하는 양송이버섯 추출물의 생리적 기능에 대한 활성을 탐색하기 위하여 양송이 버섯(Agaricus bisporus)의 에탄올 추출물의 항산화 효과와 Ames test를 통한 돌연변이 유발 억제능을 탐색하였다. 지질과산화물에 대한 단백질 보호효과를 알아본 결과, 양송이 버섯 에탄올 추출물은 MDA와 BSA의 교차결합 형성을 100mg/assay이었을 때 72.21% 저해하였다. $Fe^{2+}$에 의해 유도된 지질의 과산화에 대한 저해율은 2.0 mg/assay일 때 24.96% 였으며, DPPH 라디칼 소거 활성을 측정한 결과 1.0 mg/assay일 때 52.75%의 저해율을 보였으며 처리농도가 증가할수록 저해율은 증가하였다. $IC_{50}$ 값으로 항산화능의 상대적 비교를 하였을 때 양송이버섯 추출물은 DPPH 라디칼 소거 활성이 가장 강하였으며, 그 다음은 지질과산화 억제능이었고 MDA와 BSA의 교차결합 억제능이 가장 낮았다. Ames test를 이용하여 돌연변이 유발 억제능을 알아본 결과, 양송이버섯 에탄올 추출물은 Salmonella Typhimurium TA98 및 TA100 두 균주에서 직접작용 돌연변이능을 각각 100% 저해하여 매우 효과적이었다. 간접작용 돌연변이능 저해효과는 Salmonella Typhimurium TA98에서 86.09%, Salmonella Typhimurium TA100에서는 81.93%로 나타나 양송이버섯 에탄올 추출물은 직접, 간접작용 돌연변이능에 대한 저해효과가 우수하다고 사료된다. 본 연구 결과를 종합해 볼 때, 양송이버섯은 항산화성과 항돌연변이성이 우수하므로 기능성식품으로 개발할 수 있는 가능성이 있다고 본다.