• 한국식품저장유통학회지
• /
• 제8권2호
• /
• pp.231-238
• /
• 2001

The concentrations of total polyohenolic compound from extract of Paulownia tomentosa Stued. were water-soluble extract 7.98%, methanol extract 12.30% and ethanol extract 11.63%. The free radical scavenger activities of three extracts at the levels of 0.5% were higher than that of BHT(butylated hydroxytoluene). In antioxidative activities measured the concentrations of TBARS(thiobabituric acid reactive substances) in tissues microsome induced with Fe$\^$++/ascorbate, the water-soluble extract was errdctively suppressed in liver and spleen. In antioxidative activities determined by thiocyanate method against lipid peroxidation using linoleic acid, the methanol extract showed the higher compared with other extracts, but BHT showed the highest antioxidative activity. These results suggest that fruit extracts of Paulownia tomentosa Stued. showed to have relatively high concentrations of polyphenolic compounds and antioxidative activities.

• 한국수산과학회지
• /
• 제20권1호
• /
• pp.52-56
• /
• 1987

The antioxidative activity of each molecular weight (MW) fraction of Maillard reaction products prepared from a D-glucose and glycine system, i. e., MW below 1000, MW between 1000 to 3000 and MW above 5000, nondialyzable melanoidins, reduced melanoidins and ozone-treated melanoidins were estimated in a linoleic acid-aqueous system. The antioxidative activity ana reducing ability of Maillard reaction products increased with increasing molecular weight and color intensity. Maillard reaction products of MW above 1000 showed obvious antioxidative activity and reducing ability, whereas the MW fraction below 1000 showed only weak activities. When nondialyzable melanoidins were reduced with sodium borohydride, their color intensity and reducing ability remarkably decreased, but their antioxidative activity did not decrease so much.

• 한국식품영양학회지
• /
• 제28권1호
• /
• pp.9-15
• /
• 2015

This study was conducted to improve the quality of Wanja-jeon, a Korean traditional food utilizing beef. Antioxidative evaluation of the ingredients in Wanja-jeon showed that soybean powder was highest in DPPH, ABTS radical scavenging activities and in reducing power among the food ingredients tested. Since soybean powder demonstrated high antioxidative activity, beef was replaced with soybean powder in Wanja-jeon to increase the antioxidative activity. All antioxidative activities such as DPPH and ABTS radical scavenging activities as well as reducing power increased with increases in the amount of soybean powder replacing beef. In texture analysis, the hardness, chewiness and brittleness of Wanja-jeon were highest when beef was replaced with 20% soybean powder, whereas the springiness and cohesiveness of the Wanja-jeon were highest with 50% of the beef replaced with soybean powder. The Hunter's color L and b values were highest in Wanja-jeon with 50% soybean powder replacing beef, while the a value of the color was highest in Wanja-jeon with 30% soybean replacing beef.

• 생약학회지
• /
• 제28권1호
• /
• pp.15-20
• /
• 1997

This study was carried out to investigate the antioxidative activities of domestic plants grown in the area of Kangwon-do province. Through the examination of methanol extracts from 15 plants for radical scavenging effects using DPPH method, the extracts from Pinus densiflora Sieb. et Zucc. And Euphorbia humifusa Willd. Showed strong antioxidative activity. Because of its highest antioxidative activity among 15 domestic plants, radical scavenging effects of four different extract compartments from leaves of P.densiflora, n-Hexane, EtOAc, BuOH and $H_2O$ extracts. Were examined by DPPH method. Antioxidative activities of EtOAc and BuOH extracts were similar or even higher than that of natural (tocopherol) or synthetic antioBfdants (BHA) , suggesting that major fraction for the antioxidative activity of P. densiflora was the EtOAc and BuOH extract compartments.

• 한국작물학회지
• /
• 제45권4호
• /
• pp.257-260
• /
• 2000

The content of anthocyanin, cyanidin 3-glucoside (C3G) and the peonidin 3-glucoside (P3G) from 591 rice cultivars and the antioxidative activities of MeOH extract from 8 rice cultivars were evaluated. Among them, C3G content of pigmented rice were ranged from 0 to 451.9mg in 100 g brown rice, while the P3G contents were in the range from 0 to 42.7mg in 100g brown rice. There was no correlation between C3G and P3G content. Total anthocyanin content ranged from 0 to 475.1mg in 100g brown rice. The antioxidative activity, the scavenging activity on DPPH (2,2-diphenyl-picryl-hydrazyl) radical of MeOH extracts from rice grain, were different according to cultivars. The activity of blockish purple pericarp rice cultivars was twice stronger than that of white pericarp cultivar. Especially, the antioxidative activity of Heugjinjubyeo was four times stronger than that of white pericarp cultivar. The scavenging effect on DPPH radical in rice extracts was related to the total anthocyanin contents of the extracts.

• 한국환경과학회지
• /
• 제19권4호
• /
• pp.407-414
• /
• 2010

Physiological activity and antioxidative activity of Maesangi(Capsosiphon fulvescens) extracts with distilled water or 95% ethanol were investigated. For the evaluation of physiological and antioxidative activities, some evaluation assay methods such as measurement of Hunter color value, chlorophyll a/b value, total phenolics, reducing power and thiobarbituric acid(TBA) value of soybean oil were used. Proximate composition and mineral contents of Masaengi were orders of crude protein>crude fiber>moisture>crude ash>crude lipid, and K>Ca>Mg>Na>P>Fe>Zn, respectively. In ethanol extract, the content of total phenolic compounds in Maesangi was determined to half times of that in Dasima(Laminaria). The reducing power of Maesangi-ehtanol extract was about 5 % of vitamin C and was lower than that of Dasima-ethanol extract. The TBA value of Maesangi-ethanol extract on soybean oil oxidation was about 47 % and 68.4 % to control in three and eight days oxidation, respectively. But TBA value difference was not observed significantly with the dosage below 5mL of ethanol extract.

• Preventive Nutrition and Food Science
• /
• 제2권3호
• /
• pp.191-196
• /
• 1997

The antioxidative activity of seven different acylated anthocyanin pigments isolated from grape, sweet potato, eggplant and red cabbage was evaluated bvy using linoleic acid autoxidation and rat liver microsomal systems. The acylated anthocyanins were isolated and purified by Amberlite SAD-7, ODS and Sephadex LH-20 column omatography, and preparative HPLC. Most of acylated anthocyanisns exhibited antioxidative activity as strong as $\alpha$-tocoperol, and especially peonidin3-O--(6-O-trans-caffeyl)-2-O-(6-O-trans-feuloylglucopyranosyl)-$\beta$-D-glucopyranosyl-5-O-$\beta$-D-glucopyranoside from purple sweet potato showed the strongest activity, comparable to BHA (not significant, p<0.05) in the linoleic acid system. Meanwhile, two acylated anthocyanins from the pericarps of grape and eggplant inhibited considerably the MDA formation from rat liver microsomal lipid peroxidation induced by FeSO$_4$/$H_2O$$_2$. In particular, malvidin 3-O-(6-O-p-coumaroyl)-$\beta$-D-glucopyranosde from grape pericarps showed the strongest antioxidant activity, comparable to $\alpha$-tocopherol (not significant, p<0.05). These results suggest that the acylated anthocyanins from fruits and vegetables can be used as potential dietary ntioxidants and natural colorants.

• International Journal of Advanced Culture Technology
• /
• 제7권3호
• /
• pp.120-125
• /
• 2019

In this paper, we have isolated six phenolic compounds, such as (+)-catechin (1), taxifolin (2), taxifolin-3-O-${\beta}$-D-(+)-xylose (3), quercetin (4), quercetin-3-O-${\alpha}$-L(+)-rhamnose (quercitrin) (5), apigenin-8-C-rhamnosyl-(1'''${\rightarrow}$2'')-glucoside (2''-O-rhamnosylvitexin) (6) from the EtOAc(Ethyl Acetate) and $H_2O$ soluble fractions of Japanese anise(Illicium anisatum L) leaves and twigs. Also, we have evaluated antioxidative and antiviral activity for each isolated compound. The antioxidative test was DPPH (1,1-diphenyl-2-picrylhydrazyl) radical scavenging activity. According to the experimental results, all of the isolated compounds indicated the increased radical scavenging activities as the concentration increases and most of the isolated compounds indicated generally good antioxidative values compare to the controls, ascorbic acid and ${\alpha}$-tocopherol. In the antiviral activities, all of the isolated compounds had no potentials in rhinovirus 1B (HRV 1B). But in enterovirus 71 (EV 71) and Influenza virus A/PR/8 (Influenza PR8), only quercetin (4) indicated the good antiviral activity compare to the control. Based on the above results, we found that the phenolic compounds of Japanese anise may be applied for one of the natural biomass sources that can be used as an antioxidant and an antiviral substance.

• 한국식품조리과학회지
• /
• 제27권6호
• /
• pp.763-772
• /
• 2011

This study evaluated the antioxidative activity and quality characteristics of Sulgidduk (traditional rice cakes) prepared with ramie leaf powder, in order to measure the antioxidative activity of ramie leaves, which are a potentially useful antioxidant food. Antioxidant activities were measured by total phenolic contents, the scavenging activities of DPPH radicals and ABTS+ radicals, and the reducing power. The total phenolic content of freeze dried ramie leaves was estimated at $58.70{\pm}11.42mg$ GAE/g. The $IC_{50}$ values for DPPH radicals and the ABTS+ radical scavenging activity of the ramie leaves were $23.76{\pm}1.41ug/mL$ and $174.82{\pm}6.4ug/mL$, respectively. The leaves also showed a high reducing power of $1.1057{\pm}0.03$ (O.D). To increase the utilizability of ramie leaf, we made Sulgidduk with added ramie leaf powder. Re-grading the quality characteristics of the altered Sulgidduk, the 3% and 5% addition levels most satisfied texture profile analysis and sensory evaluation. The antioxidative effect of the Sulgidduk significantly increased as the addition level increased, compared to the original Sulgidduk. In term of DPPH radical scavenging activity, the 5% or more addition level Sulgidduk showed an antioxdative effect increase of more than 50%. At the 3% or higher addition level, there was higher antioxidant activity than in the positive control group, which included vitamin C and BHT additions. We thus concluded that Sulgidduk with added ramie leaf power can be manufactured as a food that can satisfy sensory preferences as well as boosting antioxidant activity, at both the 3% and 5% addition level.

• 한국자원식물학회지
• /
• 제21권1호
• /
• pp.12-18
• /
• 2008

제주도에 자생하는 양치식물 25종을 대상으로 항산화활성, ACE 저해활성, APN 저해활성 및 $\alpha$-amylase 저해활성을 검색하였다. 항산화활성은 쇠고비와 일색고사리에서 비교적 높아서 항산화 음료로 애용되고 있는 차나무 잎보다도 더 높았다. ACE 저해활성과 APN 저해활성은 전체적으로 낮았으나, 쇠고비에서 각각 26.7%와 28.2%으로 비교적 높은 저해활성을 나타내었다. $\alpha$-Amylase 저해활성은 10종이 50% 이상의 높은 활성으로 보였으며, 그 중에서 쇠고비와 홍지네고사리의 저해활성이 특히 높았다. 이상의 결과로부터 쇠고비는 항산화활성뿐만 아니라 ACE 저해활성, APN 저해활성과 $\alpha$-amylase 저해활성 모두 다른 식물에 비해 높아 생리활성 물질의 분리 및 동정 등 식품소재 및 식물생약으로 이용하기 위한 후속 연구가 기대된다.