• Journal of the Korean Society of Food Science and Nutrition
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• v.38 no.1
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• pp.62-69
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• 2009

Maillard reaction products (MRPs) were produced from aqueous solution of various sugars with defatted hydrolyzed soybean protein (DFHSP) with different temperatures and pressures. Physicochemical properties of MRPs were investigated; also, DPPH and hydroxyl radical scavenging activity and sensory properties were evaluated. MRPs from ribose and DFHSP had the highest reactivity with larger pH reduce, higher browning index increase and higher antioxidant activity than other MRPs from other sugars. The antioxidant activities were increased with increasing temperatures and pressures of reaction. The highest antioxidant activity and sensory preference were obtained from MRPs with ribose at $140^{\circ}C$ with 2.8 kg/$cm^2$ for 30 mins.

• Archives of Pharmacal Research
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• v.28 no.5
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• pp.534-540
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• 2005

Activity-guided fractionation of the CH$_2Cl_2$-soluble fraction of the roots of Sophora flavescens furnished five 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical scaveng ers: trans-hexadecyl ferulic acid (1) cis-octadecyl ferulic acid (2), trans-hexadecyl sinapic acid (3), (-)-4-hydroxy-3-methoxy-(6aR,11aR)-8, 9-methylenedioxypterocarpan (4) and desmethylanhydroicaritin (8), along with nine known inactive compounds: (-)-maackiain (5), xanthohumol (6), formononetin (7), (2S)-2'-methoxykurarinone (9), (2S)-3${\beta}$,7,4'-trihydroxy-5-methoxy-8-(${\gamma},{\gamma}$- imethylallyl )-flavanone (10), (2S)-7,4'-dihydroxy-5-methoxy-8- (${\gamma},{\gamma}$-dimethylallyl ) -flavanone (11), umbelliferone (12), kuraridin (13), and trifolirhizin (14). Compounds 1-4 and 8 exhibited DPPH free radical scavenging effects at IC$_{50}$ values of 33.01 ${\pm}$ 0.20, 57.06 ${\pm}$ 0.16, 39.84 ${\pm}$ 0.36, 35.83 ${\pm}$ 0.47, and 18.11 ${\pm}$ 0.04${\mu}$M, respectively. L-Ascorbic acid, when used as a positive control, exhibited an IC$_{50}$ value of 7.39 ${\pm}$ 0.01 ${\mu}$M. Compounds 1-4 and 8 also appeared to exert significant scavenging effects on authentic ONOO-, with IC$_{50}$ values of 5.76 ${\pm}$ 1.19, 15.06 ${\pm}$ 1.64, 8.17 ${\pm}$ 4.97, 1.95 ${\pm}$ 0.29 and 4.06 ${\pm}$ 2.41 ${\mu}$M, respectively. Penicillamine (IC$_{50}$= 2.36 ${\pm}$ 0.79${\mu}$M) was used as a positive control. In addition, compounds 2,4,6,8, and 10 were isolated from this plant for the first time.

• Journal of the Korean Society of Food Culture
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• v.27 no.5
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• pp.505-511
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• 2012

This study was conducted to investigate the antioxidant activity of Jeolpyeon containing lotus seed powder. Original Jeolpyeon and Jeolpyeon with BHT (butyl hydroxy toluene) werecompared. Antioxidant activities were measured based ontotal polyphenolic contents, total flavonoid contents, DPPH radicalscavenging activity, reducing power, and SOD-like activity. Total polyphenolic and total flavonoid contents of Jeolpyeon containing lotus seed powder were estimated at $37.81{\pm}0.45$ mg GAE/g and $26.35{\pm}0.13$ mg QE/g respectively. DPPH radical scavenging activity increased upon addition of lotus seed powder. Further, reducing power was higher in Jeolpyeon containing lotus seed powder than original Jeolpyeon or Jeolpyeon with BHT. The antioxidative effect of Jeolpyeon significantly increased uponaddition of lotus seed powder.

• The Korean Journal of Food And Nutrition
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• v.17 no.2
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• pp.138-146
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• 2004

This study was designed to investigate antioxidative activity of substances isolated from 25 kinds of useful plants resources toward free radical and human low density lipoprotein(LDL). Methanol extracts of Oenothers odorate had the highest antioxidative activity similar with ${\alpha}$-tocopherol. Methanol extracts of Oenothers odorate was extracted again by the ethylacetate. The ethylacetate soluble acidic fraction obtained from methanol extract of Oenothers odorate showed highest activity toward human LDL. Each fraction was purified through Sepadex LH-20 chromatography by elution of chloroform-methanol mixture (90:10 v/v). Fraction, F-2 obtained from Oenothers odorate showed at highest levels of electron donating activity. Fraction, F-2 was identified as 3,4-dihydroxybenzoic acid and 3-hydroxycinnamic acid.

• Journal of Mushroom
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• v.17 no.4
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• pp.268-274
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• 2019

Sparassis latifolia is a useful medicinal mushroom that has recently gained popularity in Asia. It has a rich flavor and is a good source of nutrients contains a large number of polyphenols for a functional food or dietary supplement. In addition, S. latifolia is rich in beta-glucan and gamma-aminobutyric acid (GABA). These two compounds have been reported to show immune-stimulating and anticancer effects by numerous studies. In this study, four species of lactic acid bacteria (Lactobacillus plantarum subsp. plantarum, L. acidophilus, L. helveticus, and L. delbrueckii subsp. bulgaricus) were used to ferment the fruiting body of S. latifolia. Fermented S. latifolia extracts were found to have a higher polyphenol content and antioxidant activity following fermentation as well as increased protease activity.

• Journal of the Korean Applied Science and Technology
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• v.35 no.4
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• pp.1276-1284
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• 2018

probiotics strains promoting the health are a collection of microorganisms that improve or restore microbial populations in the intestines. In this study, Leuconostoc probiotics was isolated from fermented gimchi and identified. Angelica dahurica, containing abundantly antioxidant activity, imperator, is a wildly grown species of angelica native. Before fermentation, total phenolics compound were $48.83{\pm}4.9GAE\;mg/g$ in the Angelica dahurica extract. After fermentation total phenolic compounds were $97.7{\pm}12.6GAE\;mg/g$. The total amount of phenol in the fermented product was 30.2% higher than that before fermentation. The total flavonoid content before fermentation was $9.86{\pm}4.3mg/g$ and the total flavonoid content was $37.17{\pm}7.4mg/g$ after fermentation, which was 82.3% higher than before fermentation. The DPPH radical scavenging activity, superoxide radical scavenging activity, hydroxy radical scavenging activity and $Fe^{{+}{+}}$ chelating antioxidative activity of the Angelica dahurica extract were $41.6{\pm}7.1%$, $65.7{\pm}8.4%$, $55.26{\pm}9.4%$ and $17.5{\pm}4.6%$, respectively. After fermentation, they were $60.3{\pm}12.6%$, $78.8{\pm}8.3%$, $56.9{\pm}4.9%$ and $36.6{\pm}8.9%$, respectively. Therefore, the present study suggests that the fermentation using the probiotics strain of the Angelica dahurica extract can be used as a functional health food and cosmetic material with increased antioxidant capacity.

• Journal of the Korean Society of Food Science and Nutrition
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• v.34 no.9
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• pp.1297-1301
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• 2005

This study was carried to develop the new functional food material by exploring natural antioxidant substances of Crotalaria sessiflora L. We compared antioxidative activity of potential antioxidant substances extracted from Crotalaria sessiflora L. The order of extract yield of Crotalaria sessiflora L. were stem > loaves > seed > root. Antioxidative activities of Crotalaria sessiflora L. were measured by total polyphenol contents EDA (electron donating activity), SOD (superoxide dismutase) -like activity, hydroxyl radical scavenging ability and hydrogen peroxide radical scavenging ability. Total polyphenol acid content was much higher in leaves Ex than other extracts. And leaves Ex showed the most excellent antioxidative activity ($86.27\%$) in terms of SOD-like activity. The EDA was ordered loaves Ex > stem Ex > seed Ex > root Ex. Hydroxy radical scavenging ability was the most effective in loaves Ex, and hydorogen Peroxide radical scavenging ability was the highest in seed Ex. Therefore we could be certain that leaves Ex was the most effective in antioxidative activity from Crotalaria sessiflora L.

• Preventive Nutrition and Food Science
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• v.11 no.2
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• pp.171-175
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• 2006

Alnus japonica Steud (Betulaceae) has long been used as a Korean traditional medicine for gastric disorders, hepatitis, and fatty liver. As a part of our study on the identification of secondary metabolites of naturally occurring bioactive compounds, we isolated 1,7-bis(4-hydroxyphenyl)-3,5-heptanediol(1), 5-hydroxy-1,7bis(4-hydroxyphenyl)-3-heptanone(2), 5,3'-dihydroxy-7,4'-dimethoxyflavone(3) and 3,5,7,3',4'-pentahydroxyflavone(4) from the dichloromethane and ethylacetate-soluble fractions of Alnus japonica Steud. These compounds showed significant antioxidant activity in a concentration-dependent manner. The $IC_{50}$ values of compounds 1, 2, 3 and 4 were 30.1, 37.4, 20.2 and 13.7 ${\mu}g/mL$, respectively, through the scavenging capacity of 1,1-diphenyl-2-picrylhydrazyl radical assay.

• Journal of the Korean Society of Food Science and Nutrition
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• v.32 no.8
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• pp.1370-1376
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• 2003

We investigated the effect of seatangle drink and seatangle extract on lipid oxidation, blood coagulation and intestinal movement in rats fed a hyperlipidemic diet. In the dietary hyperlipidemic induced group, the serum superoxide dismutase activity decreased and formation of hydroxy radical increased when compared to normal group, but these were controlled by seatangle drink treatment. The decreased of bleeding time and increased of tissue factor in the dietary hyperlipidemic rats were regulated by seatangle drink and seatangle extract, and especially the activity of tissue factor was remarkably decreased. Seatangle drink and seatangle extract were increased contraction on intestinal movement. Therefore, it can be concluded that seatangle drink or seatangle extract treatment depresses changing in absorption of gastrointestinal track in rats fed a hyperlipidemic diet.

• Journal of the Korean Society of Food Science and Nutrition
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• v.39 no.6
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• pp.789-795
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• 2010

In order to set up an accurate quality criteria for the Boraginaceae that have been traditionally used for medical purposes and food colorant, and to assess its viability as functional food ingredient, antioxidant tests were conducted on the wild and cultivated plants. Variety of indicators including total contents of phenol, DPPH, SOD-liked effect, hydroxy radical-scavenging effect, lecithin oxidation inhibitory effect, etc were analyzed. Wild and cultivated gromwell's total contents of phenol in their methanol extracts were 0.14% and 0.13%, while they were most active in ethyl acetate extracts and n-hexane extracts, respectively. $IC_{50}$ values of methanol extract of the wild and cultivated plants were 794.41 ${\mu}g$/mL and 971.86 ${\mu}g$/mL, indicating that the wild plant is more responsive (p<0.05) to low concentration. Also the wild and cultivated plants were most active in ethyl acetate fraction and n-hexane extracts when their $IC_{50}$ values were measured by each solvent extracts. SOD-liked effects of both plants were concentration dependent while methanol extracts were more active (p<0.05) in 500 ${\mu}g$/mL than other solvent extracts. Hydroxy radical-scavenging effect of both plants showed less than 50% activity in concentration of 1,000 ${\mu}g$/mL except in chloroform fraction and n-hexane fraction. Lecithin oxidation inhibitory effects of the wild and cultivated plants were active in methanol and solvent extracts of 200~1000 ${\mu}g$/mL. Especially it showed 90% of high inhibitory effect in 1,000 ${\mu}g$/mL of chloroform fraction. Hence, both wild and cultivated Boraginaceae were analyzed to be viable as functional food ingredient.