• 한국응용과학기술학회지
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• 제15권3호
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• pp.27-31
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• 1998

Antioxodative substances in Mulberry leaves were examined. Antioxidative substances in Mulberry leaves were extracted by 80% methanol agueous solution. Antioxidative activity of extract was determined by examining hydrogen donating ability on 1,1-diphenyl-2-picrylhydrazyl (DPPH) and the inhibitory effect on the formation of the peroxide from Linoleic acid in the test tube at $50^{\circ}C$. Antioxidative substance were, then, separated and indentified by thin layer chromatography(TLC), UV-Vis spectrum and High performance liquid chromatography(HPLC) methods. Hydrogen donating ability on DPPH and antioxidative ability on linoleic acid of the extracted antioxidative substance were higher than those of 100ppm butylated hydroxy toluene(BHT). The extracted antioxidative substances were separated by TLC using ethylacetate : chloroform : formic acid : water(8 : 1 : 1 : 1 v/v) as a solvent, and a spot at Rf=0.35 was detected. The spot was scraped from the plate, and extrated by methanol. The extract was analyzed by UV-Vis spetra and HPLC, and chlorogenic acid was identified as a antioxidative substance.

• 한국식품위생안전성학회지
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• 제2권1호
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• pp.15-20
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• 1987

효모의 항산화작용을 알아보기 위하여 IFO 효모, 간장에서 분리한 효모, 막걸리에서 분리한 효모 및 당밀에서 분리한 효모를 각각 $1{\times}10^6/ml$로 증식시켜 어유에 접종하여 $30^{\circ}C$에서 배양하면서 POV, TBA-V의 변화를 조사하여 그 항산화력을 검토하였다. 항산화활성은 Saccharomyces rouxii와 Torulopsis etchellsii가 가장 높았고, 막걸리에서 분리한 효모 중에서는 Pichia ohmerii가 가장 높았다. 그리고 당밀에서 분리한 효모중에서는 Candida versatilis가 항산화작용이 높았다.

• 한국지역사회생활과학회지
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• 제15권1호
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• pp.85-90
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• 2004

To classify the physiological activity by habitat and part of Dandelion (Taraxacum officinale), antioxidative and antimicrobial activities were investigated from methanol extracts of Dandelion. Dandelion was taken from Uiryeong (in Kyungnam province) and from Seoul, and antioxidative and antimicrobial activities were measured for three different parts of the dandelion: the flower, leaf and root. Antioxidative activities of methanol extracts from Dandelion were examined by a DPPH test, and antimicrobial activities were examined against 5 microorganisms: Bacillus subtilis and Bacillus cereus as G(+) microorganisms, and Salmonella typhimurium, Staphylococcus aureus and Eschrichia coli as G(-) microorganisms. No significant differences were found in terms of antioxidative and antimicrobial activities between the dandelions in Uiryeong and the dandelions in Seoul. Antioxidative activity, however, was higher in the flower of the dandelion, irrespective of habitat. Further research with other physiological factors (besides antioxidative and antimicrobial activities) is necessary to shed light on dandelion physiological function and to enhance the utilization of dandelion.

• 한국식품저장유통학회지
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• 제4권3호
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• pp.311-315
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• 1997

Proximate compositions of black rice and antioxidative effects of its methanol extract on refined perilla oil were investigated. Black rice seeds were composed of water 12.4%, crude protein 7.9%, crude fat 2.2%, crude fiber 1.0%, ash 1.4% and N-free extract 75.1%. The hexane and 80% methanol fractions in yields were higher than 80% ethanol and chloroform. In AOM(active oxygen method) test, antioxidative effects of black rice added to the refined perilla oil was increased with dose-dependent fashion in concentration of the black rice extracts. Among several extracts tested, 80% aqueous methanol extract showed the highest antioxidative activity, followed by hexane, chloroform, in that order. The peroxide value and TBA value for their antioxidation stability were also lower than that of control. This result was similar to that of AOM test.

• 한국지역사회생활과학회지
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• 제15권2호
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• pp.101-107
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• 2004

Many studies have presented results about the antioxidative and antimicrobial activities of Dandelions(Taraxacum officinale). There has yet to be a study which makes comparisons based on the variety or parts of the Dandelion. To compare the physiological activity, antioxidative and antimicrobial activities were measured by using methanol extracts of Korean and Western Dandelions. The Dandelions were taken from Uiryeong in Kyungnam province, and antioxidative and antimicrobial activities of the flower, leaf and root were measured. Antioxidative activities of the methanol extracts were examined with a DPPH test. Antimicrobial activities were examined against 5 microorganisms. Bacillus subtilis and Bacillus cereus served as G(+) microorganisms, while Salmonella typhimurium, Staphylococcus aureus, and Eschrichia coli served as G(-) microorganisms. There was no significant difference in the antioxidative activity of the methanol extracts from leaves and roots between varieties. The antioxidative activity of the flower extracts was higher in the Korean than in the Western samples but the highest level of antioxidant was lower than 70%. No significant difference in antimicrobial activities between the varieties was observed. More research using physiological factors other than antioxidative and antimicrobial activities is needed to identify physiological functions and enhance the utilization of Dandelions.

• 한국식품과학회지
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• 제14권2호
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• pp.130-135
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• 1982

인삼중에 함유되어 있는 항산화물질의 본태를 파악하기 위하여 인삼의 각종 용매(petroleum ether, chleroform, chleroform-methanol, methanol 및 methanol-water)추출물들이 혼합 불포화지방산 메틸에스테르(MEUFA)의 자동산화에 미치는 영향을 in vitro에서 검토한 결과는 다음과 같다. 1. 인삼의 각종 용매 추출물들은 모두 항산화작용을 나타내어 MEUFA의 자동산화에 의한 지질 과산화물의 형성을 억제하였다. 그 중에서도 클로로포름 및 클로로포름-메탄올(2 : 1, v/v)추출물들이 보다 강한 항산화작용을 나타내었다. 2. Olcotte 등의 oven test에 의한 무게의 증가는 MEUFA의 자동산화에 의한 과산화물의 형성에 기인함이 확인되었다. 3. 인삼의 각 추출물들은 MEUFA의 지질 과산화물형성의 유도기간을 연장시켰다. 4. 각 추출물들의 항산화작용에 있어서 Olcott 등의 oven test에 의한 무게의 측정 Lea법과 Rhodan 철법에 의한 POV 측정 등의 결과에서 추정되는 작용은 상호간 잘 일치되었다. 이상의 결과로부터 인삼중에는 항산화물질들이 인삼성분으로서 함유되어 있음이 in vitro에서 확인되었다.

• 한국식품과학회지
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• 제23권5호
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• pp.578-581
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• 1991

EPA 및 DHA가 각간 25, 10% 함유된 어유에 상업용 레시틴을 첨가하여 어유의 산화안정성에 미치는 레시틴의 산화 방지효과를 AOM 시험, Oven 시험, 중합물 시험, 색도 시험 등을 통해서 비교하였다. 레시틴을 첨가한 산화안정성은 제품의 종류에 따라 산화안정성에 차이는 있었으나 첨가량이 증가할수록 산화안정성이 증가됨을 알 수 있었다. 가장 우수한 항산화성을 갖고 있었던 레시틴(III)을 1, 5, 10%을 첨가함에 따라 AOM 조건에서 유도시간이 각각 310, 620, 840%로 증가하였다. 또한 레시틴(III)을 10% 첨가한 시료구에서는 AOM 조건에서 10시간까지 중합물이 생성되지 않았으나 색도는 저장시간이 경과할수록 증가하였고 고온에서 더욱 가속화되었다.

• 생명과학회지
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• 제10권5호
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• pp.524-528
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• 2000

택사(Alismatis Rhizoma)는 중국에서 많이 생산되고, 우리나라에서도 그 생산량의 50%이상이 전남 순천지방에서 생산되고 있는데, 옛부터 생약으로 많이 사용되어 왔으며, 최근 택사분말은 무좀에 도포약으로 쓰이고 있어 택사에는 다양한 생리활성이 있는 것으로 생각된다. 따라서 본 연구에서는 추출용매에 따른 택사 추출물에 대한 항균 및 항산화성에 대하여 조사하였다. Paper disc법에 의한 택사 추출물의 항균 test결과 물추출물에서는 거의 모든 시험균주에서 항균활성이 나타났으나, 메탄올 및 에탄올 추출에서는 그 활성이 작게 나타났으며, 시험균주중 Vibrio parahaemolyticus균에 가장 강한 항균활성을 나타내었다. Linoleic acid에 대한 항산화력의 조사에서 택사 물추출물 100$\mu{l}$첨가시 메탄올 및 에탄올 추출물은 항균효과 나타나지 않았고, 물추출물은 효과가 나타났으나 0.1% BHT첨가시 보다는 그 효과가 적었다.

• 한국식품영양학회:학술대회논문집
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• 한국식품영양학회 2003년도 하계 학술 심포지엄
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• pp.77-77
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• 2003

This study was performed to investigate the antioxidative effect as the inhibition of MDA and BSA conjugation reaction, inhibition of lipid peroxidation and the scavenging effect on DPPH radical, and antimutagenic capacities as the Ames test in 7 common vegetables taken by Korean for suggestion of prevention and dietetic treatment of chronic diseases and development of antioxidative and antimutagenic functional food. The water extracted fractions of perilla leaves were most effective in the inhibition of MDA and BSA conjugation reaction showing 77.2% of inhibition rate among 7 vegetables. The inhibition rates of ethanol extracted fractions of sedum and wild water dropwort on the lipid peroxidation were 67.1% and 61.5%, respectively. The ethanol extracted fractions of crown daisy and wild water dropwort showed the most effective results among 7 vegetables in the DPPH radical scavenging capacities showing inhibition rate of 78.8% and 73.6%, respectively. The indirect and direct antimutagenic effects of ethanol extract of 7 vegetables were examined by Ames test using Salmonella typimurium TA98 and TA100. Inhibitory effects of wild water dropwort was superior to the other vegetables on the Ames test. These results suggest that common 7 vegetables taken by Korean are believed to be a possible antioxidative and antimutagenic capacities, although the resultswere different, some or less, according to the assay method and vegetables used.

• Journal of Nutrition and Health
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• 제32권1호
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• pp.110-117
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• 1999

Free radicals formed during the metabolism of environmental chemicals are known to induce mutagenicity, while different types of antioxidants suppress this event. The purpose of this study was to determine the antioxidative and antimutagenic effects of soybean saponins, and to examine the relationship between these two effects for the elucidation of mechanisms involved in the anticarcinogenicity of soybean saponins. Also, antioxidative and antimutagenic effects of soybean saponins were compared with those of kinown antioxidants. For the measurement of antioxidative capacity, soybean saponins, L-ascorbic acid, $\alpha$-tocophoerol, and BHT at concentrations between 005 and 1.0mg/ml were tested for their ability to donate hydrogens and to reduce the formation of thiobarbituric substances(TBARS). Antimutagenic activity was examined using the Ames salmonella test system at concentrations of 600, 900 or 1200ug/ml. Study results showed soybean saponins and all of the other antioxidants tested possessed dose-dependent antioxidative activities. The ability of hydrogen-donation to DPPH was in the order of L-ascorbic acid>$\alpha$-tocopherol=>BHT>soybean saponins. TBARS formation was also inhibited by these compounds, in the order of BHT>$\alpha$-tocopherol=L-ascorbic acid>soybean saponins. Soybean saponins and other antioxidants also showed antimutagenicity in a dose-dependent manner. Especially, soybean saponins and BHT were excellent antioxidants compounds, inhibiting near 80% of the mutagenic effects at a concentration of 1200ug/ml. The correlation coefficients between antioxidative capacity and antimutagenicity for each compund was statistically significant at p<0.05. These results indicate that soybean saponins possess antioxidative and antimutagenic capacities. Also, antimutagenicity of saponins and other antioxidats is partly due to their antioxidative activities.