• The Korean Journal of Food And Nutrition
• /
• v.14 no.6
• /
• pp.591-595
• /
• 2001

The antioxidant and synergistic effects of sesame oil cake extract treated with $\beta$ -glucosidase were examined. The sesamin and sesamolin were identified from the 80% ethanol extract of seame oil cake treated with $\beta$ -glucosidase, which suggested the presence of the active substances as their glycosides in sesame seed. The contents of sesamin and sesamolin in sesame oil cake extract were about 8.32% (8,315.4 mg/100g) and 0.28% (2,824.5mg/100g) , respectively. Sesame oil cake extract showed antioxidant activity at concentrations of 50ppm, 100ppm and 200ppm, and the effect was Increased with the addition of sesame oil cake extract. The antioxidant effect of sesame oil cake extract was stronger than that of $\alpha$-tocopherol or ascorbyl palmitate, but weaker than of BHT Also, when the sesame oil cake extract(50ppm) was used in combination with $\alpha$-tocopherol(50 ppm), the sesame oil cake showed very strong synergistic effect.

• KIEAE Journal
• /
• v.15 no.5
• /
• pp.107-112
• /
• 2015

Purpose: This study desires to investigate an effect of indoor temperature, humidity, and illuminance targeting a planting system of double-skin facade and cavity space adjacent to the outside within a certain period of winter. Through this, the study suggests a basic material about an energy conservation effect of double window system using planting to reduce heating load of a building in winter, so desires to contribute to indoor thermal comfort effect and illuminance correction study of double window and indoor plant. Method: Considering effects such as day and night climatic elements and air conditions in winter, illuminance measurement was conducted through a double-skin facade of space, a subject of the measurement, on the basis of practical residence time of a resident, and this study analyzed characteristics of indoor illuminance about this. The study measured and compared a change of insolation, dry-bulb temperature, and relative humidity at each indoor-outdoor measuring point, so measured and compared characteristics of an indoor temperature effect by elements of double-skin facade and indoor plant. Result: Through this study, the researcher could determine that indoor plant within double window in winter not only blocks solar radiation but also photosynthesizes, so is somewhat disadvantageous to winter thermal comfort reducing heating load. In addition, solar radiation going through interior plays a role to bring down somewhat high humidity to about 50% of reasonable humidity, so plays a direct role of maintenance of comfortable indoor space. Although there are effects such as blocking of solar radiation and temperature reduction, this has a positive influence on humidity control and proper illuminance distribution. The researcher could determine that illuminance, temperature, and humidity by solar radiation penetration for the whole measuring time play a role to supplement indoor environment mutually.

• Journal of the Korean Society of Food Science and Nutrition
• /
• v.32 no.2
• /
• pp.207-210
• /
• 2003

This study was designed to investigate the antioxidative effect of glasswort (Salicornia herbacea L.) grown in closed sea beach. To compare antioxidant effects of glasswort plant parts, dried ground leaves, stems, and roots of glasswort were exploited for investigation of antioxidant activity Antioxidant activity for the samples was investigated by Rancimat and TBA method. The oxidative stability determined by the Rancimat technique showed a variation in antioxidative index (AL) between the different plant parts, ranging from 1.0 to 3.6. Oxidative stability from ground stem sample of glasswort harvested in the closed sea beach was the highest, and followed by leaf and root. Stem had higher oxidative stability than ascorbic acid. Antioxidatiue effects of glasswort were increased in dose-dependent manners, and antioxidant activity by addition of glasswort with same amount to 4% oil was similar to the activity of ascorbic acid. Specially, 8~10% glasswort addition to oil showed similar antioxidative effect to 1% $\alpha$-tocopherol.

• Journal of the Korean Society of Food Science and Nutrition
• /
• v.33 no.3
• /
• pp.480-486
• /
• 2004

Despite many therapeutic advances in the understanding of the processes in carcinogenesis, overall mortality statistics are unlikely to change until there is reorientation of the concepts for the use of natural products as new anticarcinogenic agents. In this study, we investigated the anticarcinogenic activity, antioxidant and DPPH scavenging activity of Sargassum fulvellum (SF). SF was extracted with methanol, which was further fractionated into five different types: hexane (SFMH), ethylether (SFMEE), ethyl acetate (SFMEA), butanol (SFMB) and aqueous (SFMA) partition layers. We determined the cytotoxic effect of these layers on human cancer cells by MTT assay. Among various partition layers of SF, at starting concentration of 100 $\mu\textrm{g}$/mL, SFMEE showed very high cytotoxicity which were 92, 90 and 84% and kept high throughout 5 concentration levels sparsed by 100 $\mu\textrm{g}$/mL against all three human cancer cell lines: HepG2, HT-29 and HeLa. SFMEA showed a low cytotoxicity at the beginning concentration level, but as the concentration became denser, growth inhibition effect of cancer cell lines started to increase and at 500 $\mu\textrm{g}$/mL, it hit the highest, which were 91, 96 and 98% against the same three cell lines as above. We observed QR induced effect in all fraction layers of SF. SFMEE showed similar tendensy of QR induced effect as did against cytotoxicity. The QR induced effect of SFMEE on HepG2 cells at 25 $\mu\textrm{g}$/mL concentration indicated 3 times higher than the control value of 1.0 and SFMH tended to be concentration-dependent on HepG2 cells. At 100 $\mu\textrm{g}$/mL, the QR induced effects resulted a ratio, which was 2.5 times higher than the control value. In search for antioxidation effects of SF extract and partition layer, the reducing activity on the 1, 1-diphenyl-2-picryl hydrazyl (DPPH) radical scavenging potential was sequentially screened. The SFM has similar antioxidant activity as to BHT and vitamin C groups.

• Journal of the East Asian Society of Dietary Life
• /
• v.23 no.3
• /
• pp.374-381
• /
• 2013

The purpose of this study was to analyze the antioxidant effects and antimicrobial activity of extracts from yacon powder. The total polyphenol contents of yacon powder extracted with methanol was 38.5 mg/g, while extracted with water was 24.0 mg/g. Extractions with methanol were therefore more effective than with water. The total flavonoid contents of yacon powder extracted with methanol was 9.2 mg/g, while that with water was 7.8 mg/g. The electron donating ability of yacon powder extracts, natural antioxidant, and artificial antioxidant at 1.0 mg/mL arranged in order of decreasing concentration were ascorbic acid (98.7%) > BHT (44.7%) > methanol extract (12.1%) > water extract (7.8%). Nitrite-scavenging ability of yacon powder extracted with methanol at pH 1.2 was 13.1%, while that of powder extracted with water at pH 1.2 was 6.8%. And, the hydroxyl radical scavenging activities of yacon powder with methanol at 5 mg/mL was 40.2%. The antimicrobial activity of yacon powder extracted with methanol could be detected on Bacillus cereus ($10,000{\mu}g/disc$) and Staphylococcus aureus ($10,000{\mu}g/disc$).

• Food Science and Preservation
• /
• v.6 no.1
• /
• pp.121-135
• /
• 1999

Effective synthetic antioxidants such as butylated hydroxyanisole(BHA) and butylated hydroxytoluene(BHT) have been widely used in the food industry, but they are suspected to be toxic and carcinogenic effects. Therefore, the development of safely available natural antioxidants such as ascorbic acid, ${\alpha}$-tocopherol, ${\beta}$-carotene, flavonoids and selenium is essential. In particular, flavonoids, 2-phenyl-benzo-${\alpha}$-pyrones, are polyphenolic compounds that occur ubiquitously in food of plant origin. flavonoids occur in foods generally as O-glycosides with sugars bound usually at the C\ulcorner position. And variations in their heterocyclic ring gibes rise to flavones, flavonols, flavanones, flavanols, catechins, anthocyanidins, chalcone and isoflavones. Vegetables, fruits, and beverages are the main dietary sources of the flavonols, primarily as quercetin, kaempferol, and myricetin and the corresponding flavones, apigenin and luteolin. These flavonoids have biological activity such as antioxidant, anti-inflammatory, antithrombotic, antimutagenic, anticarcimogenic antiallergic and antimicrobial activity effects in vitro and in vivo. Flavonoids posses strong antioxidant activities acting as oxygen radicals scavenger, metal chelators and enzyme inhibitor. The antioxidant activity of flavonoids is determined by their molecular structure and more specially, by the position and degree of hydroxylation of the ring structure. All flavonoids with the 3`, 4`-dihydroxy(ortho-dihydroxy) posses marked antioxidant activity. And antioxidant activity increases with the number of hydroxyl groups substituted on the A-and B-rings. There is as yet no certainty about the effect of the presence of a double bond between C\ulcorner and C\ulcorner on the antioxidant activity of flavonoids.

• Korean Journal of Plant Resources
• /
• v.24 no.3
• /
• pp.319-323
• /
• 2011

The purpose of this study is to analyze antioxidant activity and multidrug resistance reversing activity in several Korean colored soybean (Glycine max Merr.) cultivars. Antioxidant activity of methanol extracts from colored soybean cultivars was evaluated by TBARS (thiobarbituric acid reactive substances), DPPH (1, 1-diphenyl-2-picrylhydrazyl) and ABTS (2,2'-azino-bis (3-ethylbenzothiazoline-6-sulphonic acid) methods. By means of TBARS, cultivar "Jeonnam #1" showed the highest activity until 7 days, and followed by "Black #1", "Jinyul" and "Black #3", showing lower activity than that of BHT (butylated hydroxytoluene). Methanol extracts of all cultivars proved that DPPH radical scavenging activity is dose-dependent. Methanol extract from cultivar "Jeonnam #1" showed highest DPPH radical scavenging activity, and followed by cultivars "Black #1". MDR (multi-drug resistance reversing) activity, however, showed the highest effect in "Black #3" and the lowest "Black #1" cultivar. These results suggest that seed colors of soybean may play an important role in antioxidant activity and MDR activity.

• The Korean Journal of Food And Nutrition
• /
• v.26 no.1
• /
• pp.92-100
• /
• 2013

This study investigated the quality and antioxidative properties of a Korean fried rice cake, Gaeseong-Juak (doughnut of waxy rice) added with Prunus yedoensis Matsumura (PYM) extract, vitamin C and BHT. Gaeseong-Juak was prepared by adding PYM extract at 0, 0.5, 1, and 2% of waxy rice powder. The moisture contents of Gaeseong-juak added with PYM extract varied between 17.50% and 21.70%. Among the samples, the lowest moisture content was 2% Gaeseong-juak added with PYM extract. The contents of the samples obtained from crude protein, crude fat, crude ash were 4.47~4.73, 11.15~12.50, and 0.73~0.82%, respectively. The as the content of PYM extract increased, L-values significantly decreased while a-value and b-value significantly increased (p<0.001). The texture profile analysis of the Gaeseong-Juak was not significantly different at the samples. In the sensory test, the sample containing 0.5% PYM extract obtained good scores. The antioxidative effect of the Gaeseong-Juak significantly increased as the addition level increased, compared to the original Gaeseong-Juak (p<0.001). From these results, we suggest that PYM is a good ingredient for increasing the consumer acceptability and the functionality of Gaeseong-Juak.

• Journal of the Korean Society of Food Science and Nutrition
• /
• v.24 no.3
• /
• pp.378-383
• /
• 1995

Phospholipid(PL), phosphatidylcholine(PC) and phosphatidylcholine free PL(PCF) were extracted from squid viscera and the antioxidant effects of each fraction on the oxidation of refined fish oil were evaluated. Polyunsaturated fatty acid contents were the highest in PC(46.7%) followed by PL(44.8%) and PCF(40.9%). The effects of each phospholipid fraction on stabilizing fish oil were compared by incubating at 40$^{\circ}C$ for 10 days. At the initial period(2 days), changes in peroxide value did not show any significant difference ; however, as incubation time was extended, PC fraction showed the strongest antioxidant activity. PL and PCF added to fish oils also resulted in increased stability against oxidation. Antioxidative effect of PC at the 5% level was equivalent to 0.05% BHT, 1% catechin and 1% tocopherol.

• Preventive Nutrition and Food Science
• /
• v.2 no.3
• /
• pp.207-213
• /
• 1997

The effect of various vegetables commonly consumed by Koreans on the induction of glutathione S-trasferase(GST) activity in mice was assessd. The extract of vegetable dissolved in propylene glycol (5ml/kg body wt.) was administered to ICR female mice 6 to 8 weeks old via gavage during 5 days. The changes of body weight and liver weight of all treated groups were not significantly different compared with control group. Hepatic protein contents of trated groups compared with control group were not significantly different except BHT treated group. The induction of GST activity in liver cytosol of mice was the greatest with broccoli, followed by radish, wild green onion, turnip, and green onion. The induction of GST activity in liver cytosol increased up to 1.5 to 1.8-folds at a dose of 24 g fresh vegetable/mouse. The induction of combination between vegetables was the highest with the combination of broccoli and radish (1.83-fold), followed by that of broccoli and green onion (1.72-fold), and that of broccoli and turnip (1.50-fold).