• Title, Summary, Keyword: DPPH 라디칼 소거활성

Search Result 1,003, Processing Time 0.041 seconds

Anti-oxidant Activities of Vinegar Beverage Containing Sasa quelpaertensis Nakai Extract (제주조릿대 추출액을 활용한 식초 음료의 항산화 활성 연구)

  • Han, Joung-Hwan;Kim, Seong-Cheon;Oh, Han-Sol;Lee, Young-Joo;Park, So-Jeong;Ko, Ha-Na;Lee, Nam-Ho
    • Proceedings of the KAIS Fall Conference
    • /
    • /
    • pp.733-736
    • /
    • 2010
  • 제주조릿대 잎 열수 추출 진액을 첨가한 식초음료를 개발하기 위해 항산화 활성을 관찰하였다. 항산화활성은 DPPH radical 소거활성, Hydroxyl radical 소거 활성 실험을 진행하였다. Base 식초를 선택하기 위한 쌀 식초와 사과식초의 DPPH 라디칼 소거활성에서는 식초 원액에 비해 제주조릿대를 첨가하였을 때 쌀 식초는 최대 68.07%증가하는 것을 확인 할 수 있었고, 사과식초의 경우 78.74% 증가하는 것을 확인할 수 있었다. 맛, 향, 단가, 항산화활성을 통하여 사과식초를 Base식초로 선택하였으며, Base식초와 제주조릿대 진액의 혼합비를 결정하기 위하여 배합율에 따른 항산화활성 연구에서는, DPPH 라디칼 소거활성의 경우 제주조릿대의 비율이 높아짐에 따라 DPPH 라디칼 소거능 역시 증가하는 것을 확인 할 수 있었다. Hydroxyl 라디칼 소거활성의 경우, 제주조릿대 진액의 비율을 증가시킬 수록 활성이 조금씩 떨어졌으나, 대조군인 석류와 블루베리 식초에 비해서는 10%이상 높은 소거활성이 있는 것을 확인할 수 있었다.

  • PDF

Evaluation of DPPH Radical Scavenging Activity of Jeju Seaweeds Using High Throughput Screening (HTS) Technique (High Throughput Screening (HTS) 기법을 통한 제주 자생 해조류의 DPPH 라디칼 소거활성 평가)

  • Kim, Kil-Nam;Heo, Soo-Jin;Cha, Seon-Heui;Jeon, You-Jin
    • Journal of Marine Bioscience and Biotechnology
    • /
    • v.1 no.3
    • /
    • pp.170-177
    • /
    • 2006
  • As a rapid and quick bioactive compound evaluation technique, in this study we utilized a automatic system of High Throughput Screening (HTS) to investigate DPPH radical scavenging efficacy of seaweeds, collected from Jeju Island in Korea. In this study, 6 species of green seaweeds, 18 species of brown seaweeds and 22 species of red seaweeds extracted with methanol at $20^{\circ}C$ and $70^{\circ}C$ were subjected to HTS. Of the green seaweeds tested, Enteromorpha compressa (20G6) of the green seaweeds showed DPPH radical scavenging activity of over 60%. On the other hand, the other green seaweeds showed poor DPPH radical scavenging activities (lees than 40%) at 1 mg/ml. Sargassum siliquastrum (20B17, 70B17), Dictyota dichotoma (70B1), Sargassum coreanum (70B16) and Ecklonia cava (70B26) among the brown seaweeds showed significantly high DPPH radical scavenging activity with 96%, 97%, 92%, 92%, 87%. Polysiphonia japonica (20R24), Schizymenia dubyi (20R17), Gelidium amansii (20R18) and Acrosorium flabellatum (20R23) among the red seaweeds showed remarkable DPPH radical scavenging activity of over 90%.

  • PDF

Evaluation of Antioxidant and Antimicrobial Activities of Solvent Extracts from Coriolus versicolor (구름버섯(Coriolus versicolor)의 용매 추출물에 대한 항균 및 항산화 활성 조사)

  • Han, So-Ra;Noh, Min-Young;Lee, Joo-Ho;Oh, Tae-Jin
    • Journal of the Korean Society of Food Science and Nutrition
    • /
    • v.44 no.12
    • /
    • pp.1793-1798
    • /
    • 2015
  • Antioxidant activities of various solvent extracts from Coriolus versicolor were investigated for their total polyphenol content, total flavonoid content, 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity, and 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) cation radical scavenging activity. C. versicolor extracts were produced by organic solvents such as ethanol, ethyl acetate, and methanol. Total polyphenol and flavonoid contents in the ethanol and ethyl acetate extracts were higher than those in the methanol extract. DPPH radical scavenging activity of methanol extract showed the highest value of 80.3%, which was similar to that of ascorbic acid (85.5%). All extracts showed good (>90.0%) ABTS cation radical scavenging activity. The antimicrobial activities of these extracts from C. versicolor were evaluated against six strains of bacteria using the disc diffusion method. All extracts showed antimicrobial activities against all tested bacteria except Staphylococcus aureus. These results indicate that various extracts from C. versicolor could be useful as natural antioxidant and antimicrobial agents.

Radical scavenging and α-glucosidase inhibitory effects of Mongolian Iris bungei extract (몽골산 Iris bungei 추출물의 자유 라디칼 소거 및 α-glucosidase 저해 활성)

  • Jeong, Yun Hee;Jeong, Gyeong Han;Kim, Tae Hoon
    • Korean Journal of Food Preservation
    • /
    • v.24 no.6
    • /
    • pp.879-884
    • /
    • 2017
  • In a continuing screening of selected medicinal plants native to Mongolia, the antioxidant and ${\alpha}$-glucosidase inhibitory activities of methanol extract of Iris bungei were investigated. After extraction with 80% of methanol, the methanol fraction was further extracted with n-hexane, EtOAc and n-BuOH in order to obtain four different solvent-soluble fractions, namely n-hexane-soluble, EtOAc-soluble, n-BuOH-soluble and $H_2O$ residue. The antioxidant properties were evaluated by radical scavenging assay using 1,1-diphenyl-2-picrylhydrazyl (DPPH) and 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) ($ABTS^+$) radicals. The anti-diabetic efficacy of I. bungei extract was investigated by ${\alpha}$-glucosidase assay. All tested samples showed dose-dependent radical scavenging and ${\alpha}$-glucosidase inhibitory activities. Among the tested extracts, the EtOAc-soluble fractions showed the greatest radical scavenging activity and ${\alpha}$-glucosidase inhibitory properties among other solvent-soluble fractions. This result suggested that there was a significant relationship between the total phenolic content and biological efficacy. Thus, I. bungei extract might be considered as a new potential source of natural antioxidant and as a ${\alpha}$-glucosidase inhibitory source. A more systematic investigation of this biomass sill be performed for further investigation of activity against antioxidative and anti-diabetic effects.

Antioxidant Activity and Inhibitory Effect of Taraxacum officinale Extracts on Nitric Oxide Production (서양민들레 부위별 추출물의 항산화활성 및 nitric oxide 생성저해효과)

  • Min, Kyung-Chun;Jhoo, Jin-Woo
    • Korean Journal of Food Science and Technology
    • /
    • v.45 no.2
    • /
    • pp.206-212
    • /
    • 2013
  • In the current study, antioxidant properties of extracts from different parts of Taraxacum officinale were determined by measuring the radical scavenging activity of 1,1-diphenyl-2-picryl hydrazyl(DPPH) and 2,2'-Azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS). The antioxidant activity of aerial and root parts of this plant was measured in extracts obtained from various solvents, e.g., water, 50, 70, 100% ethanol, and hot-water. The hot-water extracts had the highest radical scavenging activities. A further study was conducted to determine the total antioxidant activity of hot-water extract fractions obtained from different solvents, e.g., chloroform, ethyl acetate, n-butanol, and water. The ethyl acetate fraction of this extract displayed the strongest DPPH and ABTS radical scavenging activity and the highest total phenolic contents. The inhibitory effect of individual solvent fractions on the production of nitric oxide in LPS-stimulated RAW 264.7 cells was measured. The results indicated that the ethyl acetate fraction of aerial and roots part extracts significantly reduced nitric oxide productions.

Isolation and Structure Elucidation of Radical Scavengers from Chrysanthemum boreale Makino (산국(山菊)의 자유라디칼 소거 물질 분리 및 동정)

  • Han, Wan-Soo
    • Korean Journal of Medicinal Crop Science
    • /
    • v.11 no.1
    • /
    • pp.1-4
    • /
    • 2003
  • Two antioxidative compounds in Chrysanthemum boreale were isolated by a bioassay using a 2, 2-diphenyl-1-picrydrazyl(DPPH) free radical. They were identified as apigenin, linarin(acacetin-7-O-rutinoside) on the basis of $^1H\;and\;^{13}C-NMR$ and MS data. The DPPH radical scavenging activity$(RC_{50}:\;13.3{\mu}g)$ of apigenin was similar to that of ${\alpha}-tocopherol\;(12.1{\mu}g)$ and L-ascorbic acid$(13.1{\mu}g)$

Free radical scavenging and α-glucosidase inhibitory effects of a roots extract of Aruncus dioicus var. kamtschaticus (재배 삼나물 뿌리 추출물의 자유 라디칼소거 및 α-glucosidase 저해활성)

  • Jeong, Gyeong Han;Kim, Tae Hoon
    • Korean Journal of Food Preservation
    • /
    • v.23 no.7
    • /
    • pp.989-994
    • /
    • 2016
  • As part of our continuing search for bioactive natural products, the antioxidant and ${\alpha}$-glucosidase inhibitory activities of an 80% methanolic extract and organic solvent soluble-portions of Aruncus dioicus var. kamtschaticus roots were investigated by using a bioassay system. The antioxidant activity of A. dioicus var. kamtschaticus roots extract and organic solvent soluble-portions were assessed by examining with 1,1-diphenyl-2-picrylhydrazyl (DPPH) and 2,2'-azino-bis (3-ethylbenzothiazoline-6-sulphonic acid) ($ABTS^+$) radical scavenging. In addition, anti-diabetic effects of the A. dioicus var. kamtschaticus root extract and organic solvent soluble-portions were tested via ${\alpha}$-glucosidase inhibition assay. The total phenolic contents of the products were determined by applying UV-VIS spectrophotometry. All tested samples showed dose-dependent radical scavenging and ${\alpha}$-glucosidase inhibitory properties. In particular, the ${\alpha}$-glucosidase inhibitory and radical scavenging effects of the ethyl-acetate (EtOAc)-soluble portion from the roots of A. dioicus var. kamtschaticus were greater than those from other solvent-soluble portions. These results indicate that A. dioicus var. kamtschaticus could be considered a new effective source of natural antioxidants and anti-diabetic materials. More systematic research of the constituents of the roots of this A. dioicus variety will be conducted to further develop its antioxidative and anti-diabetic properties.

Proton Beam Sensitivity of Radical Scavenging Activity from Plant Resources (식물자원의 양성자 빔 조사에 대한 라디칼 소거능활성의 민감도)

  • Moon, Byung-Sik;Lee, Kap-Duk
    • Journal of the Society of Cosmetic Scientists of Korea
    • /
    • v.35 no.3
    • /
    • pp.229-233
    • /
    • 2009
  • 20 species of plants were extracted with Methanol and were investigated for DPPH radical scavenging activity and ABTs free radical scavenging activity to quest anti-oxidation ability depending on the proton beam irradiation quantity. In the proton beam irradiation, 15 species's activities increased but among them, Pharbities nil Choisy decreased at 10 KGray and 4 species' activity didn't change at all. In hydrogen ion radical elimination activity, Ulmus macrocarpa (84 %) showed the highest and Pharbitis nil Choisy showed 6 % decreasing at more than 1 KGray. By comparison with untreated $IC_{50}$ value, the beam-treated $IC_{50}$ value increased 6.3 times for Dioscorea batatas Decne. at 1 KGray, 2.1 times for Trichosanthes kirilowii Max., and 2.8 times for Dioscorea batatas Decne. at 5 KGray. In ABTs free radical elimination activity, the activity increased 60 % for Terminalia chebula Retzius compared with untreated one. Besides, the beam-treated $IC_{50}$ value increased 2 times for Gray Ephedra sinica Stapf, 2.5 times for Terminalia chebula Retz. and 2.4 times for Arctium lappa Linne at 1 KGray.

Hot Water Extraction Optimization of Dandelion Leaves to Increase Antioxidant Activity (항산화 활성 증진을 위한 민들레 잎의 열수추출 조건의 최적화)

  • Koh, Yoon-Jeoung;Cha, Dong-Su;Choi, Hee-Don;Park, Yong-Kon;Choi, In-Wook
    • Korean Journal of Food Science and Technology
    • /
    • v.40 no.3
    • /
    • pp.283-289
    • /
    • 2008
  • This study used response surface methodology (RSM) in an effort to optimize the hot water extraction conditions of dandelion leaves in order to increase antioxidant activity in the extract. A central composite design was applied to investigate the effects of independent variables, which included the ratio of solvent to sample ($X_1$), extraction temperature ($X_2$), and extraction time ($X_3$), on dependent variables of the extracts, including soluble solid ($Y_1$), total polyphenols ($Y_2$), total flavonoid ($Y_3$), 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging ability ($Y_4$), 2,2'-azino-bis (3-ethylbenzthiazoline-6-sulfonic acid) (ABTS) radical scavenging ability ($Y_5$), and superoxide radical scavenging ability ($Y_6$). The estimated optimal conditions were as follows: $83.77{\pm}1.07^{\circ}C$ of the extraction temperature, $20.85{\pm}0.24 mL/g$ of solvent per sample, and $1.59{\pm}0.12$ hr of extraction time. At the optimal conditions, the predicted characteristic values were: a yield of 38.98%, a total polyphenol level of $74.28{\mu}g/mg$, a total flavonoid level of $74.00{\mu}g/mg$, a DPPH radical scavenging ability ($IC_{50}$) of 0.14 mg/mL, a ABTS radical scavenging ability ($IC_{50}$) of 3.24 mg/mL, and a superoxide radical scavenging ability ($IC_{50}$) of 2.49 mg/mL.

Changes of phenolic acid contents and radical scavenging activities of ginseng according to steaming times (수삼의 증숙 횟수에 따른 페놀산 함량 변화와 라디칼 소거활성)

  • Kim, Young-Chan;Hong, Hee-Do;Rho, Jeong-Hae;Cho, Chang-Won;Rhee, Young-Kyung;Yim, Joo-Hyuk
    • Journal of Ginseng Research
    • /
    • v.31 no.4
    • /
    • pp.230-236
    • /
    • 2007
  • This study was conducted to investigate the contents of the total phenolic compounds, and DPPH, ABTS radical scavenging activities of phenolic acid fractions of ginseng according to steaming times. Also the individual phenolic acid compositions and contents were analyzed by GC. The contents of the total phenolic compounds proportionally increased from 0.530 to 2.893% according to steaming times. Phenolic acid fractions were separated according to bound types, and the insoluble bound form fraction showed the highest contents followed by ester form fraction and free form fraction. The total contents of these three fractions (1.031-1.416%) were not significantly influenced by steaming times. Salicylic, cinamic, p-hydroxybenzoic, gentisic, vanillic, syringic, caffeic, ferolic acid were found in each fraction, and gentisic and ferolic acid were the major phenolic acid. Each phenolic acid fraction showed over 50% of DPPH and ABTS radical scavenging activities. There were no differences between the phenolic acid fractions according to binding types. Free radical scavenging activities were affected by a number of steaming times and augmented as steaming times increased.