• Journal of Applied Biological Chemistry
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• v.64 no.1
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• pp.5-11
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• 2021

The phenolics of Sambucus sieboldiana var. pendula leaves for functional resources were examined on inhibitory activity against biological enzyme and anti-microbial activity. The amount of phenolic compounds were 11.60±0.18 and 12.43±0.07 mg/g by water and 50% ethanol extraction, respectively. The antioxidative activity of phenolic in extracts was higher than solids. The inhibition activities on angiotensin converting enzyme were 92.08 and 78.33% at 200 ㎍/mL phenolic concentration in water and ethanol extracts, respectively. The xanthine oxidase inhibitory activity were 100% at 200 ㎍/mL phenolic in water and ethanol extracts, respectively. These result was higher than 70.37% of allopurinol as positive control at 200 ㎍/mL. The inhibitory activity against hyaluronidase were each 25.35 and 43.38% in water and ethanol extracts. The water extract from S. sieboldiana var. pendula leaves showed antibacterial activity on the Propionebacterium acnes, Staphylococcus aureus and Streptococcus mutans in water extract and S. mutans in ethanol extract. This result suggests that phenolic from S. sieboldiana var. pendula leaves are suitable as functional foods with anti-hypertension, anti-gout, anti-inflammation and anti-microorganism activities.

• Food Science and Preservation
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• v.23 no.3
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• pp.393-401
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• 2016

The phenolic compounds extracted from Aster scaber were examined for their biological activities owing to their potential use in health and beauty food products. The phenolic content in water and 60% ethanol extracts were $11.1{\pm}0.11$ and $4.18{\pm}0.05mg/g$, respectively. The DPPH radical scavenging activities of the water and ethanol extracts were 87% and 91% at $50{\mu}g$ phenolics/mL, respectively. At the same phenolics concentration, the respective extracts showed 84% and 95% for ABTS radical decolorization activities and 95% and 97% for TBARs. The antioxidant protection factors for the water and ethanol extracts at $200{\mu}g$ phenolics/mL were 1.87 and 2.22 PF, respectively. Enzyme inhibitory activities of the water and ethanol extracts ($50{\mu}g$ phenolics/mL) were 50.8% and 69.4% on angiotensin converting enzyme, 91% and 80% on xanthine oxidase, and 24% and 89% on ${\alpha}$-amylase, respectively. The tyrosinase inhibitory activities indicating skin-whitening were 47% and 25% for the water and ethanol extracts, respectively. Anti-wrinkle effect of the water extract was relatively higher than that of the ethanol extract. These results suggest that the water and ethanol extracts of Aster scaber can be used as an ingredient in health and beauty food products.

• Food Science and Preservation
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• v.22 no.2
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• pp.267-274
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• 2015

This study was conducted to evaluate the antioxidant activities and the quality characteristics of 70% ethanol extracts from onion peels with different extraction methods (autoclave extraction, AE; low temperature high pressure extraction, LTPE; reflux extraction, RE; and stirrer extraction, SE). The yields of AE, LTPE, RE and SE were 9.00%, 5.39%, 13.21% and 12.41%, respectively. The total polyphenol and flavonoid contents in the AE were significantly higher than in the other extracts. The DPPH radical scavenging abilities with a concentration of 100 mg% (w/v) were : AE, 28.9%; RE, 26.07%; LTPE, 24.35%; and SE, 19.53%. The ABTS radical scavenging ability and the nitrite scavenging activity showed the same tendency as that of the DPPH radical scavenging ability. The angiotensin-converting enzyme (ACE) inhibitory activities of the LTPE and AE were higher than those of the RE and SE. The ${\alpha}$-Glucosidase inhibitory activity of the RE was higher than that of the extracts with other extraction methods. The nitrite scavenging activities with a concentration of 10 mg/mL were: AE. 33.97%; RE, 35.47%; LTPE, 21.86%; and SE, 21.71%. The ferrous ion chelating activity of the LTPE (54.73%) was significantly higher than that of the other extracts. These results suggest that AE is the superior method for the enhancement of anti-oxidant activity, and onion peel can be used as a natural antioxidant material for health foods and can be a good ingredient of functional foods.

• Korean Journal of Food Science and Technology
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• v.40 no.4
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• pp.443-448
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• 2008

In this study, black garlic was produced by aging under high temperature $(70^{\circ}C)$ and high humidity (90% RH) conditions. Then, the physiological activity and antioxidative effects of its extract were compared to those of normal garlic extract. The black garlic extract had a 2.5-fold higher total polyphenol content than that of the normal garlic extract, showing levels of 10.0 mg/g and 3.7 mg/g, respectively. At the $1,000{\mu}g/mL$ concentration, the black garlic and normal garlic extracts had electron donating abilities of 101.9% and 12.9%, respectively. For their nitritescavenging effects, the normal garlic extract showed slightly higher scavenging activity than the black garlic extract at the 5 mg/mL concentration; whereas the black garlic extract had a slightly higher effect at concentrations above 20 mg/mL. In terms of their superoxide dismutase activities, the black garlic extract showed a 10-fold higher activity as compared to the normal garlic extract at the 20 mg/mL concentration. Furthermore, at 50 mg/mL, the angiotensin converting enzyme inhibitory effects of the normal garlic and black garlic extracts were approximately 52.7% and 88.8%, respectively. These results indicate that the antioxidant activity and ACE inhibitory effects of the black garlic extract were greater than those of the normal garlic extract.

• Food Science and Preservation
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• v.21 no.6
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• pp.831-837
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• 2014

This study was conducted to investigate the antioxidant activity and physiological properties of Moringa (Moringa oleifera Lam.) leaves extracted with three different solvents (water, ethanol, and methanol). The extraction yield from water, methanol, and ethanol were 13.17, 9.54, and 7.48%, respectively. The highest total polyphenol content (58.04 mg/100 g) and total flavonoid contents (12.36 mg/100 g) were observed in water extract. The DPPH radical scavenging activity was the highest in the water extract (79.18%) at the 500 mg% level, similar to BHT (77.18%). Additionally the same tendency was observed with DPPH, ABTS radical scavenging ability, and ferreous ion chelating ability. The water extract showed relatively high antioxidant activities. The angiotensin I-converting enzyme (ACE) and the HMG-CoA reductase inhibitory activity of water extract at a concentration of 500 mg% were somewhat higher than those of the other extracts. Additionally, the HMG-CoA reductase inhibitory activity of the water extract was significantly slightly lower than that of the positive control (cholorogenic acid). These results suggest that Moringa leaves extracted with water will be useful as antioxidant-rich and functional natural foods.

• Food Science and Preservation
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• v.11 no.3
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• pp.388-393
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• 2004

The physiological activity of 5 kinds of medicinal plant extracts were examined. Total polyphenol contents showed the highest value in 50 $\%$ ethanol extracts. Electron donating ability showed the highest value in 50 $\%$ ethanol extracts of Glycyrrhiza uralensis. SOD-like activity showed the highest activity in 50$\%$ ethanol extracts of Glycyrrhiza uralensis. Medicinal plant extracts showed the different nitrite scavenging abilities under the different pH conditions. Medicinal plant extracts showed the highest value in nitrite scavenging ability at pH 1.2. The maximum nitrite scavenging effect was found at pH 1.2 and decreased as pH increased. Angiotensin-converting enzyme inhibitory activity showed the highest value in 50 $\%$ ethanol extracts of dried garlic.

• Journal of Mushroom
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• v.8 no.4
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• pp.150-156
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• 2010

This study was carried out to investigate the physiological activities of the ethanol extracts from 11 strains of Flammulina velutipes. In addition, the ${\beta}$-glucan and polyphenol contents were also measured. The contents of polyphenol and ${\beta}$-glucan of Flammulina velutipes were found to be more than 100 mg% and 20%, respectively, one of which showed 244.74 mg% and 27.37%, respectively. Further, The highest inhibitory activities on DPPH radical, ${\alpha}$-amyloglucosidase activity and nitric oxide production were 91.74%, 63.57% and 61.44%, respectively. However, ethanol extracts from all the strains have little effects on Angiotensin I converting enzyme(ACE)-inhibitory effects. Finally, the highest cytotoxic activities of ethanol extracts from all the strains on A549 and HT-29 cell were 76.07% and 67.05%, respectively.

• Applied Biological Chemistry
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• v.51 no.2
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• pp.102-107
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• 2008

Nitric oxide (NO) is a potent antihypertensive and vasodilator which plays an important role in regulating vascular tones. In this study, we investigated the effects of adventitious root extracts of wild ginseng on NO production and NO linked physiological activities. When human endothelial cell line (ECV304) was incubated with either water extracts of wild ginseng adventitious root (WE) or aqueous fraction of butanol extracts of wild ginseng adventitious root (ABE), considerable amounts of NO were released by the cells. The level of endothelial nitric oxide synthase (eNOS) expression was unchanged and about 6% of the angiotensin converting enzyme (ACE) was inhibited with treatment of ABE. The vasodilating activities of pulmonary artery rings in response to different doses of extracts were shown as 44.8% and 91.3% in 2.5 mg/ml WE and 0.1 mg/ml ABE, respectively. The blood pressure lowering effect was observed from the oral administered spontaneously hypertensive rat (SHR) with the lowest blood pressure (154.5${\pm}$8.6 mmHg) after 8 h. The blood pressure was recovered to the initial level after 24 h.

• Clinical and Experimental Pediatrics
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• v.52 no.2
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• pp.187-193
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• 2009

Purpose : Adiponectin is a molecule that plays an important role in the metabolic syndrome. In addition, its concentration is known to be decreased in obesity, type 2 diabetes, and coronary artery disease. Although a relationship between hypertension and serum adiponectin concentrations has been reported by several authors, such findings continue to be debated. We investigated whether hypoadiponectinemia is related to hypertension in adolescents and studied the associated genetic polymorphism. Methods : Forty hypertensive adolescents (Age 16-17 years old) and twenty normotensive matched subjects were included. Serum adipo-nectin, insulin, renin, aldosterone and angiotensin converting enzyme (ACE) levels were compared. Their carotid intima-media thickness (cIMT) and pulse wave velocity (PWV) were measured. Polymorphisms of the adiponectin I164T gene were investigated using polymerase chain reaction (PCR). Results : The hypertensive adolescents had significantly greater cIMT and PWV. In addition, the serum aldosterone, renin and insulin levels were significantly higher in the hypertensive group. The plasma concentrations of adiponectin did not differ significantly between the two groups. TC genotype was not found in our study subjects; they all had the TT genotype of the adiponectine gene. Conclusion : The results of our study showed that adiponectin levels were not significantly different in adolescents with hypertension. There was no distinctive genetic polymorphism observed in this group of patients. Further large scale studies are needed to clarify the association between genetic variations and adiponectin in hypertensive adolescents.

• Journal of the Korean Society of Food Science and Nutrition
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• v.37 no.8
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• pp.957-964
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• 2008

Antioxidative, antidiabetes, antibacterial, anticancer and angiotensin-converting enzyme (ACE) inhibitory activities of methanol extracts of dried persimmon, fresh persimmon and persimmon leaves were investigated. Total polyphenol content of dried persimmon, fresh persimmon and persimmon leaves were 147.79, 301.45 and $315.90\;{\mu}g/mg$, respectively, of which fresh persimmon and persimmon leaves had significantly higher total polyphenol than dried persimmon. Activities of DPPH radical scavenging, lipid peroxidation inhibition and salivary $\alpha$-amylase inhibition were increased in persimmon leaves related to total polyphenol contents. Anticancer activities against AGS of fresh persimmon and persimmon leaves were $65{\sim}70%$; however, there were no significant differences between dried persimmon and fresh persimmon on free radical scavenging activity and inhibitory activity of salivary $\alpha$-amylase. Also, extracts of dried persimmon, fresh persimmon and persimmon leaves showed good ACE inhibitory activities. Dried persimmon and fresh persimmon showed antibacterial activities on E.coli O157:H7. Therefore, there are many difference activities by dried and parts of persimmon. From this result, it is suggested that persimmon leaves is believed to have possible antioxidative, antidiabetes and anticancer capacities by polyphenol, but further studies on the identification of the active compound(s) as antioxidant, antidiabetic, antihypertensive and antibacterial materials will be needed to develop a better understanding of its potency on persimmons.