• 한국식품영양과학회지
• /
• 제30권3호
• /
• pp.421-425
• /
• 2001

Antioxidative effects of crude chlorophylls and carotenoids extracts from mustard leaf kimchi on the lipid peroxidation in rat liver homogenate, egg phosphatidyl choline (EPC) liposome and superoxide anion radical were examined. The extracts were found to inhibit the increase of the thiobarbituric acid (TBA) value and show the effect of antioxidative activity on the liposomal phospholipid membrane. The oxidation index of EPC liposome was markedly decreased in the prescence of the extracts. The antioxidative activity of the extracts from mustard leaf kimchi was not related with fermentation period of the kimchi. The extracts from mustard leaf showed the similar antioxidative activity of $\alpha$-tocopherol within in the given level of addition. However, the oxidation index. When the effect of the extracts from mustard leaf kimchi on free radical scavenging was observed by the determination of the superoxide anion radical scavenging activity, it had similar value to that of $\alpha$-tocopherol.

• 대한한방내과학회지
• /
• 제39권3호
• /
• pp.313-322
• /
• 2018

Objectives: Wild ginseng pharmacopuncture is widely used in oriental medicine. However, there is no standard method for efficiently extracting the active ingredient. In this study, in order to determine an efficient extraction method, wild ginseng was extracted by the distillation and 70% ethanol reflux methods, respectively. In comparing each extract, the index compounds were analyzed, and antioxidant activity was measured. Methods: The index compounds, ginsenoside Rg1 and ginsenoside Rb1, were detected using high performance liquid chromatography (HPLC). Antioxidative activities of total phenolic compounds, DPPH (${\alpha}$, ${\alpha}$-diphenyl-${\beta}$-picrylhydrazyl), ABTS (2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid)) and FRAP (ferric reducing antioxidant power) were measured to compare their bioactivities. Since saponin is known to be hemolytic, the hemolytic activity of each extract was compared. Results: The index compounds were analyzed. Nothing was detected in the wild ginseng distilled extracts (WGDE). In the wild ginseng 70% ethanol reflux extracts (WGEE), ginsenoside Rg1 was 3.66 mg/g, and ginsenoside Rb1 was 16.70 mg/g. WGEE showed higher levels than WGDE in all antioxidative activities. In the hemolytic test, the extracts showed almost no toxicity, but WGEE showed lower toxicity than WGDE. Conclusions: In this study, it was concluded that WGEE is more advantageous than WGDE in the detection of index compounds and bioactivity. However, additional studies of additional extraction methods and other bioactivity tests are needed.

• 한국환경과학회지
• /
• 제21권10호
• /
• pp.1265-1274
• /
• 2012

This study was conducted to investigate the extraction characteristics including total polyphenol compound content (TPC) and the antioxidative effect of Rumex crispus root extract on commercial corn oil. Extraction yield was increased with extraction temperature but decreased with extraction ratio. No significant differences in aromatics content were found among the extracts prepared with various extraction conditions; extraction ratio, extraction temperature, extraction pH and composition of extractant. Total flavonoid content of the extract was increased with extraction temperature and extraction pH, and highest value of it was found when extractant composition of ethanol in water was 75%. Total polyphenol compound content (TPC) of the extract with 10 fold extraction ratio showed the highest value, but no significant difference in TPC was found with extraction temperature. Reducing power and DPPH (${\alpha}$,${\alpha}$-diphenyl-${\beta}$-picrylhydrazyl) radical scavenging ability (RSA) of the extract in spectrophotometric absorbance were decreased with extraction ratio but increased with extraction temperature and showed 63.1%~98.4% and 67.6%~86.7% of those of ascorbic acid in reducing power and DPPH RSA, respectively. The antioxidative effects of the extract on corn oil were 84.8~93.0% of that of commercial butylated hydroxytoluene, the antioxidant index value was highest when the ethanol composition to water in extractant was equal ratio.

• 한국식품과학회지
• /
• 제30권2호
• /
• pp.266-271
• /
• 1998

천연물로부터 안전성과 안정성이 우수한 항산화성 물질을 찾기 위하여 생약류 10종을 선정하여 95% ethanol으로 추출하면서 추출 수율과 팜유를 기질로한 항산화력을 비교한 결과 울금이 가장 좋은 것으로 나타났다. 이러한 울금 추출물을 팜유에 대해 첨가농도를 $0.05{\sim}0.5%$까지 높혀 가면서 현재 사용되는 천연 항산화제인 mixed tocopherol, rosemary 추출물들과 비교하여 항산화력을 측정한 결과 0.05%까지는 3종류 모두 유사한 항산화 효과를 나타내었으나 그 이상의 농도에 있어서는 울금 추출물의 항산화력이 월등히 우수하였다. 돈지에 대한 울금 추출물의 항산화 효과는 0.01% 첨가시 AI가 4.59로서 1.57인 팜유보다 월등하였으며, 대두유에 대해서는 첨가에 따른 항산화 효과가 전혀 나타나지 않았다. 각종 지방산 메틸에스테르에 울금 추출물을 각각 0.05%, 0.1% 첨가하였을 때 oleic acid methyl ester에 대해서는 AI가 각각 3.01, 4.33으로 크게 증가하였으나, linoleic acid methyl eser에 대해서는 각각 0.85, 0.96으로서 오히려 감소하는 경향이 나타났다.

• 환경생물
• /
• 제30권3호
• /
• pp.157-163
• /
• 2012

Oxidative stress has been reported to be one of causes of neuritis. This study examined antioxidative activities of methanol extracts of six amphibian species known to be medicinal animals (Rana catesbeiana, R. coreana, R. rugosa, R. dybowskii, R. nigromaculata, and Hyla japonica) and investigated their effects of inhibiting nitric oxide (NO) production and cytotoxicity on the murine macrophage RAW264.7 cells. As inflammation is closely associated with reactive oxygen species, assays on 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity, xanthine oxidase inhibitory activity, superoxide anion radical scavenging activity and NO scavenging activity of the extracts of the six species were performed to investigate their antioxidative activity. The results obtained were as follows; All extracts showed antioxidative activity, and the activity of R. dybowskii was the highest in comparison among those. Anti-inflammatory effects of the extracts were also examined, the five extracts except that of R. rugosa did not show cytotoxicity for RAW264.7 cells at the maximal concentration ($1,000{\mu}g\;mL^{-1}$). Selectivity index, meaning NO scavenging activity compared to cytotoxicity, showed the highest level in the extract of R. dybowskii. These results will be very useful basic data for future studies on prevention and treatment of human diseases to understand the biological roles of amphibian extracts throughout the antioxidative or anti-inflammatory pathways.

• 한국축산식품학회지
• /
• 제23권2호
• /
• pp.168-171
• /
• 2003

국산 프로폴리스(GBWEP)를 중탕과 실온에서 추출한 후, 식용유지에 대한 유지 산화안정도를 측정하여 항산화 효과를 검토하였다. 또한 국산과 외국산 Sigma사 프로폴리스 (SWEP)와의 항산화 효과도 비교 실험하였다. 중탕에서 추출한 WEP는 일반적인 방법인 실온에서 추출한 WEP보다 유의적으로 양호한 항산화 효과를 나타냈다. 또한 국내산 GBWEP의 항산화 효과는 SWEP와 ascorbic acid보다도 우수하였다. 특히 GBWEP를 중탕 처리한 WEP가 실온에서 추출한 WEP보다 항산화 효과가 뛰어났다. 프로폴리스는 retention time 3~10분과 18~23분 사이에서 저비점과 고비점 물질로 크게 분류되었다. 특히 10$0^{\circ}C$ 이하와 15$0^{\circ}C$ 이상에서 많은 구성성분 피크들이 분포되었다. 이것은 프로폴리스의 구성성분들이 10$0^{\circ}C$ 이하에서와 15$0^{\circ}C$ 이상에서 주로 추출되는 것으로 생각된다. 결론적으로 프로폴리스를 70~95$^{\circ}C$에서 중탕 처리함으로써 저비점의 수용성 성분들이 다량 추출되어 항산화 효과에 영향을 주었던 것으로 생각된다.

• 대한영양사협회학술지
• /
• 제19권4호
• /
• pp.389-399
• /
• 2013

This study compared the nutritional composition and antioxidative activity of different parts of Taraxacum coreanum (aerial parts and roots) according to different drying methods (natural drying and freeze-drying). There were no significant differences in vitamin C content in roots depending on the drying methods. However, vitamin A (P<0.01), E (P<0.001) and C (P<0.001) content of aerial parts, and vitamin A (P<0.001) and E (P<0.05) content of roots were significantly higher after freeze-drying compared to natural drying. For organic acids, the oxalic acid content of the aerial parts and roots were the highest. The total polyphenol and total flavonoid content in extracts from the aerial parts (P<0.01) and roots (P<0.05) were significantly higher after freeze-drying compared to natural drying. In addition, the total polyphenol and flavonoid content, DPPH radical scavenging activity, and antioxidative index from the natural drying and freeze-drying of Taraxacum coreanum extracts were significantly higher in the aerial parts compared to the roots (P<0.05). These results suggest that the nutritional composition and antioxidative activity of Taraxacum coreanum are higher in the aerial parts compared to the roots, and higher after freeze-drying compared to natural drying. Therefore, the aerial parts of Taraxacum coreanum could be suggested as an antioxidative functional food source.

• 한국자원식물학회지
• /
• 제17권1호
• /
• pp.14-19
• /
• 2004

전남 순천지역 들판에서 채취한 수종의 국화과 식물의 항산화 능력을살펴보았다. Rancimat와 TBA 방법을 이용하여 국화과 식물 중 항산화 효과가 높게 나타난 서양민들레, 조뱅이, 쑥을 선발하였다. 유지 산화안정도에 대한 실험에서 BHT와 ascorbic acid가 각각 3.86과 2.43 AI(Antioxidative Index)를 나타냈고 한련초 잎이 1.51 AI를 나타냈다. 이것은 서양민들레 잎이 유지산화안정도에 높은 항산화 효과를 나타냄을 의미한다. 한편 건조된 분쇄물과 메탄올 추출물을 이용한 장기간의 산화 억제에 대한 TBA실험에서 저장 4주 째에 BHT, ascorbic acid가 각각 0.05와 0.09 TBARS치를 나타낸 반면, 서양민들레 잎은 0.12의 수치를 나타내 대조구 1.01 TBARS치 보다 월등히 낮은 수치를 보여 우수한 항산화 효과를 보였다. 이상의 결과로 서양민들레, 조뱅이, 쑥 등의 국화과 식물에서 비교적 높은 항산화 활성을 확인할 수 있었다. 특히 이 식물체들은 기존의 인공 항산화제에 대한 하나의 대체수단으로서 식물유래 천연 항산화제로의 개발 가능성 을 시사해 주었다.

• Nutrition Research and Practice
• /
• 제1권1호
• /
• pp.14-18
• /
• 2007

This study investigated the effect of physical training and oxidative stress on the anti oxidative activity and on plasma lipid profile. Forty eight rats were given either a physical training or no training for 4 weeks and were then subdivided into 3 groups: before-exercise (BE); during-exercise (DE); after-exercise (AE). The antioxidative activity was evaluated with the activities of catalase in plasma and superoxide dismutase (SOD), the ratio of reduced glutathione/ oxidized glutathione (GSH/GSSG) and the level of malondialdehyde (MDA) in liver. The plasma concentrations of triglyceride (TG), total cholesterol (TC), high-density lipoprotein-cholesterol (HDL-C)) were also compared. Compared to those of non-training group. catalase activities of training group were lower before exercise but higher during and after exercise. SOD activities were higher regardless of exercise. GSH/GSSG ratio was higher before exercise but was not significantly different during exercise and even lower after exercise. There were no differences between non-training group and training group in MDA levels regardless of exercise. Compared to those of non-training group, atherosclerotic index of training group was lower after exercise and there were no significant differences before and during exercise. There were no differences between non-training group and training group in HDL-C regardless of exercise. These results suggest that moderate physical training can activate antioxidant defenses and decrease the atherosclerotic index and this beneficial effect is evident under exercise-induced oxidative stress.

• 한국작물학회지
• /
• 제45권4호
• /
• pp.261-266
• /
• 2000

This study was to investigate antioxidative activity of rice grain using 1, 1-Diphenyl-2-picrylhydrazyl(DPPH) and thiobarbituric acid (TBA) method and germination ability for screening rice varieties with high antioxidative activities on korean native and foreign rice varieties harvested in 1998 and 1999. The average antioxidative activity of foreign rice varieties (DPPH 63.5% and TBA 55.2%) was significantly higher than that of native rice varieties (DPPH 47.2% and TBA 45.6%) on varieties harvested in 1999. The promptness index (PI) of native rice varieties was higher in stored rices for three months (mean PI=160.7) than that of stored rices for a year (mean PI=141.6). On the other hand, the PI of foreign rice varieties was higher in stored rices stored for a year (mean PI=176.7) than that of stored rices for three months (mean PI=157.5). Varieties with high redness of hulled rice (a-value) showed significant lipid peroxidation inhibitory activity to DPPH in a stored rices for a year (r=${0.5744}^**$) and stored rices for three months (r=${0.5630}^**$) . These results indicate that the pigments of hulled rice varieties may play important antioxidative roles and colored rice varieties with higher antioxidative potentials can be developed and also may provide information with rice breeder to breed rice variety with a high antioxidative activity for a rapid screening of a small amounts of a large number of samples using color value.