• Title, Summary, Keyword: ORAC value

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Development of New Method for Antioxidant Capacity with ORP-pH System

  • Lee Se Yeong;Kim Eun Ok;Seo Hyo Jin;Kim Min Yong;Kim Jong Deog
    • Biotechnology and Bioprocess Engineering:BBE
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    • v.9 no.6
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    • pp.514-518
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    • 2004
  • Many methods are used in the measurement of antioxidative capacity. These meth­ods require very complex procedures and pretreatment. Our suggestions for research will be simple and accurate methods for obtaining many kinds of samples, especially colored samples such as natural product extracts for measuring antioxidative capacities. For oxidation-reduction potential (ORP) system value, we examined the relationships between the ORP-pH system and the ORAC, FRAP methods. To evaluate ORP System value, we calculated the absolute slope/intercept from the linear regression of each standard material at different concentrations and ORP-pH system, and compared the correlations with ORAC and FRAP values.

Comparative Study on Biological Activities of Colored Potatoes, Hongyoung and Jayoung Cultivar (유색감자 홍영 및 자영 추출물의 생물학적 활성 비교)

  • Kang, Se-Chan; Choung, Myoung-Gun
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.53 no.2
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    • pp.233-238
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    • 2008
  • This experiment was conducted to enhance the colored potatoes utilization and to determine the biological activity of colored potato extracts. In order to understand the factors responsible for the potent anti-oxidant ability of colored potatoes, it has been evaluated for anti-oxidative activity using oxygen radical absorbance capacity (ORAC) assay. 'Hongyoung' extract was significant anti-oxidant activities in ORAC assay. About two-fold higher radical absorbance capacity was found in 'Hongyoung' compared to that in 'Jayoung'. The ability of 80% ethanol extracts from colored potatoes to influence the inhibitory activity of nitric oxide (NO) and nitric oxide synthase (iNOS), cyclooxygenase-2 (COX-2) has also been investigated. The various therapeutic benefit claims in the new functional medicinal usage of colored potatoes ascribed to the phenolic compounds and anthocyanin. This result revealed that the extracts of colored potatoes are expected to be good candidate for development into sources of free radical scavenger or COX-2 inhibiting agents.

Effect of Addition of Mushroom and Sea Tangle Extracts and Mustard Leaf on Anti-oxidant Properties of Kimchi (버섯 및 다시마 추출물과 갓의 첨가가 김치의 항산화 특성에 미치는 영향)

  • Ha, Seon-Hye;Kang, Soon Ah
    • The Korean Journal of Food And Nutrition
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    • v.31 no.4
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    • pp.471-477
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    • 2018
  • The antioxidant properties of mushroom and sea tangle extracts and mustard leaf added to Kimchi were investigated by total phenolic content, DPPH radical scavenging, ABTS anion scavenging, FRAP reducing power, and ORAC value. Total phenolic content of functional Kimchi (FK) was significantly higher than that of control Kimchi (CK). DPPH radical and ABTS anion scavenging activities of functional Kimchi were significantly higher than those of control Kimchi by 2.7 and 1.7 fold, respectively (p<0.05). Also, the FRAP reducing power and ORAC value of functional Kimchi increased compared to those of the control Kimchi by 1.6 and 1.1 fold, respectively (p<0.05). Our results suggest that functional Kimchi made by mushroom and sea tangle extracts and mustard leaf may be a potent antioxidant source and could be developed as a antioxidant functional food that may be for the effective treatment of oxidant conditions. Through continuous research and development of functional Kimchi by the use of mushroom and sea tangle extracts, it will be necessary to try to identify other functions that could be useful for preventing various diseases.

Antioxidant Effects and Nitrite Scavenging Ability of Extract from Acanthopanax cortex Shoot (오가피순 추출물의 항산화 효과 및 아질산염 소거능)

  • Yu, Seok-Yeong;Lee, Young-Jun;Song, Ho-Seong;Hong, Hee-Do;Lim, Jeong-Ho;Choi, Hyeon-Son;Lee, Boo-Yong;Kang, Suk-Nam;Lee, Ok-Hwan
    • The Korean Journal of Food And Nutrition
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    • v.25 no.4
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    • pp.793-799
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    • 2012
  • This study was conducted to examine the antioxidative effect and nitrite scavenging ability of extract from Acanthopanax cortex shoot. The total phenolic compound and flavonoids contents of extract from Acanthopanax corex shoot were $116.33{\pm}6.09mg\;GAE/g$ and $65.07{\pm}4.10mg\;RE/g$, respectively. Antioxidative activities were measured by various in vitro models such as DPPH radical scavenging activity, FRAP, reducing power, ABTS radical scavenging activity, ORAC assay. This results showed that the extract of Acanthopanax cortex shoot was effective in scavenging radicals and protecting oxidation when assessed various in vitro systems. Similarly, the nitrite scavenging ability of extract was increased in a dose-dependent manner. Moreover, ORAC value at a concentration of $0.1mg/m{\ell}$ was $103.4{\pm}5.6{\mu}M\;TE/g$. Considering high consumer demand beneficial health effects, Acanthopanax cortex shoot can be utilized to develop functional food health-promoting and natural antioxidant agents.

Antioxidant and DNA Damage Protective Activities of Freeze-Dried Blue Mussel (Mytilus edulis) (동결건조 진주담치 추출물의 항산화 및 DNA 손상 보호 활성)

  • Lee, Seon Woo;Choi, Mi-Joo;Kim, Si-Kyung;Lee, Seung-Cheol;Park, Eunju
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.43 no.12
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    • pp.1801-1807
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    • 2014
  • Blue mussels (Mytilus edulis) are widely distributed among the world's oceans in various habitats. The purpose of this study was to investigate the effects of freeze-drying on the antioxidant and antigenotoxic activities of blue mussels collected in the Gyeongnam coast area of Korea. Raw (RM) and freeze-dried blue mussel flesh (FRM) were extracted with ethanol, methanol, and water. Antioxidant activities were evaluated on the basis of DPPH radical scavenging activity, oxygen radical absorbance capacity (ORAC), cellular antioxidant capacity (CAC), and antigenotoxic activity (comet assay). Except for the water extract, RM and FRM showed DPPH radical scavenging activities, which increased upon freeze-drying in MeOH extract. The highest ORAC value was observed in water extract of RM and MeOH extract of FRM. CAC was protected against AAPH-induced oxidative stress in HepG2 cells by both RM and FRM extracts. Freeze-drying lowered ORAC value of water extract, whereas it increased CAC activity, suggesting that antioxidant activities varied according to the generated radicals. All extracts from RM and FRM showed antigenotoxic activities by reducing $H_2O_2$-induced DNA damage in human leukocytes. Freeze-drying had no effect on antigenotoxicity of blue mussels. Taken together, these results indicate that blue mussels possess antioxidant and antigenotoxic properties, and freeze-drying might be a useful processing method for blue mussels to retain their maximum physiological potential as a functional food.

Antioxidant and Nitrite Scavenging Activities of Acanthopanax senticosus Extract Fermented with Different Mushroom Mycelia (버섯균사체를 달리한 발효가시오가피 추출물의 항산화 활성 및 아질산염 소거능)

  • Kim, Dan-Bi;Shin, Gi Hae;Lee, Jong Seok;Lee, Ok-Hwan;Park, In-Jae;Cho, Ju-Hyun
    • Korean Journal of Food Science and Technology
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    • v.46 no.2
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    • pp.205-212
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    • 2014
  • This study was designed to investigate the antioxidant activities (ORAC value, DPPH and ABTS radical scavenging activity, FRAP activity, and reducing power) and nitrite scavenging activities of Acanthopanax senticosus extracts fermented with the mycelia of three different mushroom species: Ganoderma lucidum, Phellinus linteus, and Hericium erinaceus. The highest total phenol content (42.09 GAE mg/g) and ORAC value ($74,912{\mu}M$ TE/g) were observed in a hot water extract of A. senticosus fermented with G. lucidum. The highest DPPH radical and nitrite scavenging activities were observed in a 70% ethanol extract of A. senticosus fermented with G. lucidum. In addition, ABTS radical scavenging activity (8-88%), FRAP activity (0.1-0.2), and reducing power (0.3-0.7) were increased by ethanol addition in all samples in a dose-dependent manner. These results provide a basic understanding of the antioxidant and nitrite-scavenging activities of A. senticosus extracts fermented with different mushroom mycelia.

Antioxidative Constituents from the Whole Plants of Euphorbia supina (애기땅빈대의 항산화 활성 성분)

  • Hong, Hyun-Kyung;Kwak, Jong-Hwan;Kang, Se-Chan;Lee, Jong-Wook;Park, Jong-Hyuk;Ahn, Jong-Woong;Kang, Hye-Sook;Choung, Eui-Su;Zee, Ok-Pyo
    • Korean Journal of Pharmacognosy
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    • v.39 no.3
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    • pp.260-264
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    • 2008
  • Eight compounds were isolated from the EtOAc soluble fraction of Euphorbia supina MeOH extract as the radical scavengers for antioxidant activity. Their structures were identified as kaempferol (1), quercetin (2), juglanin (3), avicularin (4), astragalin (5), isoquercitrin (6), hyperin (7), and nicotiflorin (8) by spectroscopic analysis. The antioxidant activity was evaluated by the ORAC (oxygen radical absorbance capacity) assay, which measures scavenging activity against peroxy radicals induced by 2,2'-azobis (2-methylpropionamidine) dihydrochloride, and the ORAC value is expressed as relative trolox equivalent. Compounds 4, 6, and 7 exhibited potent antioxidant activity, whereas the other compounds showed weaker activity than trolox.

Inhibition of Matrix Metalloproteinases-12 (MMP-12) and Anti-oxidant Effect of Xanthohumol from Hop (Humulus lupulus L.)

  • Lee, Keyong Ho;Yoon, Won Ho
    • Natural Product Sciences
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    • v.18 no.4
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    • pp.261-265
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    • 2012
  • Xanthohumol was isolated from hops (Humulus lupulus L.), and then investigated anti-oxidant effect by AAPH-induced LLC-PK1 cell and oxygen radical absorbance capacity (ORCA) assays and MMP-12 inhibitory effect by direct MMP-12 inhibition assay. The treatment of xanthohumol protected LLC-PK1 cells from AAPH-induced cell damage such as cell viability, SOD and GSH-px reduction in a dose dependant manner (0.1, 1, and $5{\mu}M$), the SOD value was 2.98, 4.51, and 5.77 U/mg protein, and GSH-px value was 30.12, 49.32, and 60.11 U/mg protein. ORAC value of xanthohumol was showed as 4320, 12004, and $14209{\mu}M$ TE/g at the concentration 0.1, 1, and $5{\mu}M$, respectively. The change of SOD and GSH-px values was significantly correlated with the results of ORAC assay, that is, AAPH-induced cell and ORCA assays. In addition, inhibition of MMP-12 that is known to play an important role in skin aging was 14%, 37%, 46%, and 79% at the concentration of 0.01, 0.1, 1, and $5{\mu}M$, respectively. On the basis of these results, xanthohumol from hops (Humulus lupulus L.) showed interesting biological and pharmacological activity such as anti-oxidant effect and anti-aging.

Screening of Traditional Medicines for Antioxidative and Anti-proliferative Effects on Rat Mesangial Cells (한약재 추출물의 항산화 및 사구체혈관간세포 증식 억제활성 탐색)

  • Sohn, Eun-Hwa;Jang, Seon-A;Woo, Han Goo;Koo, Hyun Jung;Han, Hyo-Sang;Kang, Se Chan
    • Korean Journal of Plant Resources
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    • v.26 no.5
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    • pp.652-657
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    • 2013
  • In the present study, anti-oxidative and the RMC proliferation inhibitory propeties of 80% ethanol extracts from 63 kinds of traditional medicines were investigated. Inhibitory effects of RMC proliferation were showed that Dalbergia odorifera T. Chen., Melia azedarach Linn$\acute{e}$ and Hydnocarpus anthelmintica Pierre. Among them Hydnocarpus anthelmintica Pierre had the highest anti-oxidative activity ($ORAC_{PE\;value}=1.6$, DPPH = 81.1), but Dalbergia odorifera T. Chen. and Melia azedarach Linn$\acute{e}$ had no effects. These results suggest that the Hydnocarpus anthelmintica Pierre could prevent or protect from kidney disease as antioxidant and anti-proliferative agent for RMC.

Analysis of Pectolinarin Content and Antioxidant activity in Cirsium setidens Nakai by Cultivars (산지별 고려엉겅퀴의 Pectolinarin 함량 및 항산화 활성)

  • Cho, Bong-Yeon;Lee, Jin-Ha;Ra, Moon-Jin;Kim, Sun-Young;Kang, Il-Jun;Han, Kyoung-Chan;Lee, Ok-Hwan
    • Journal of Food Hygiene and Safety
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    • v.31 no.3
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    • pp.210-215
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    • 2016
  • This study was performed to provide basic data of Cirsium setidens Nakai by cultivars that will be applied for development of functional foods and ingredients. We assessed pectiolinarin content, total flavonoids content and antioxidant effects (DPPH radical scavenging activity and ORAC assay) of C. setidens Nakai. Our results showed that the pectolinarin and total flavonoids contents of C. setidens Nakai by cultivars ranged from $3.95{\pm}0.05$ to $7.29{\pm}0.07mg/g$ and from $40.42{\pm}0.91$ to $76.70{\pm}2.24mg$ pectolinarin equivalent (PNE)/g, respectively. Among C. setidens Nakai by cultivars, the pectolinarin content was highest in GW-D extract. Futhermore, the DPPH radical scavenging activity of C. setidens Nakai ranged from 31.25 to 81.93%, respectively. The oxygen radical absorbance capacity (ORAC) value was highest in GW-D and GW-E extracts (514.49 and $501.73{\mu}M\;TE/g$, respectively). These results suggest that C. setidens Nakai extract could be considered as a good sources of natural antioxidants and functional food ingredients.