• The Korean Journal of Mycology
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• v.48 no.2
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• pp.151-160
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• 2020

The goal of this study was to investigate the diversity present among wild yeasts obtained from soils of spice fields and from mountain soils, and to further, characterize previously unrecorded novel wild yeast strains. In total, 36 strains from 17 different species of wild yeasts were isolated from 35 soil samples obtained from garlic fields of Geumsan, Chungcheongnam-do, Korea. Among these, six yeast strains of Trichosporon moniliiforme, and four strains each of Papiliotrema flavescens and Candida melibiosica species were isolated. Additionally, 22 strains of 18 different species of wild yeasts were isolated from 32 soil samples collected from the ballonflower and ginger fields of Geumsan, Korea. Finally, 46 strains of wild yeasts were isolated from 35 soil samples obtained from Mt. Daedun in Geumsan, Korea. Among the total of 106 isolated wild yeast strains, 10 strains, including Debaryomyces vindobonensis GHY31-3 represented novel yeast strains which were previously unrecorded. All the 10 previously unrecorded yeasts were oval or global in shape, and five strains, including Filobasidium stepposum SFG1-4 formed ascospores. Three strains, including Pseudozyma alboarmeniaca CD 23-5 grew well in vitamin-free medium. Cell-free extract obtained from Filobasidium magnum SFG1-3 indicated 28.6% of xanthine oxidase inhibitory activity.

• KSBB Journal
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• v.20 no.1 s.90
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• pp.40-45
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• 2005

The production of matrix metalloproteinases (MMPs) by the UV irradiated skin fibroblast and the degradation of exracellular matrix (ECM) by these enzymes is known as one of the main reasons of photoaging. In this study, to investigate the relationship between aging and Spatholobi caulis extract, we examined the effects of antioxidant, in vitro MMP inhibition and expression of UVA-induced MMP-1 in human dermal fibroblasts. Spathoiobi caulis extract was found to show scavenging activities of radicals and reactive oxygen species (ROS) with the $IC_{50}$ values of $45.81{\mu}g/ml$ against 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical and $3.11{\mu}g/ml$ against superoxide radicals in the xanthine/xanthine oxidase system, respectively. Spatholobi caulis extract inhibited the activities of MMP-1 in a does-dependent manner and the IC50 value calculated from semi-log plots was $31.96{\mu}g/ml$. Also, UVA induced MMP expression was reduced $74.66\%$ by treatment with Spatholobi caulis extract, and MMP-1 mRNA expression was reduced in a dose-dependent manner. Therefore Spatholobi caulis extract was able to significantly inhibit MMP expression in protein and mRNA level. All these results suggested that Spatholobi caulis extract may act as an anti-aging agent by antioxidation and reducing UVA-induced MMP-1 production.

• Journal of the Korean Society of Food Science and Nutrition
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• v.34 no.6
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• pp.790-796
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• 2005

Physiological activities of hot-water extract and various concentration ethanol extracts from Bokbunja (Rubus coreanum F. ) were examined. Total phenol content of extract showed higher content in hot-water extract (41.4 mg/g) than other extracts, Optimum condition of extraction for phenolic was $60\%$ ethanol extract (41.3 mg/g). The ABTS radical decolorilization and antioxidant protection factor were determined. Results shown inhibition rate on ABTS of $60\%$ ethanol extract $(99.8\%)$ and antioxidant protection factor of water extract (1.2 PF). Electron donation ability on DPPH was higher 60$\%$ ethanol extract than another percent ethanol extracts. Also hydroxyl radical scavenging activity of extracts was higher $60\%$ ethanol extracts $(0.03\times100\mu\;M)$ than another extracts because the value of TBARS was lower than another extracts. But hot-water extract had higher inhibitory activities on xanthine oxidase and pancreatin $\alpha$ -amylase than $60\%$ ethanol extract. ACE (angiotensin converting enzyme) inhibitory activities were equaled to hot water exract and $60\%$ ethanol extract. Protocatecuic acid was the most abundant phenolic compounds as analyzed by HPLC. The results will be useful as natural antioxidants and functional foods for understanding the physiological activities of Bukbunja extracts.

• Journal of Korean Society of Forest Science
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• v.99 no.4
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• pp.546-552
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• 2010

The aim of the study was to assess the cosmeceutical activity of Pyrus ussuriensis leaves and it is possible that can be used as a cosmetic ingredient for application of cosmetic industries. P. ussurensis leaf was extracted with various solvents including water, 70% ethanol and 60% acetone. In the result of DPPH (1,1-diphenyl-2-picryl-hydrazyl) scavenging radical activity, water, ethanol and acetone extract of P. ussuriensis leaf were higher than 70%, 80% and 85% at 50 ppm concentration, respectively. Xanthine oxidase inhibition activity and superoxide dismutase (SOD)-like activity by P. ussuriensis extract were higher than 30%. In addition, SODlike activity of all extracts showed tendency of the significant increase with the increase of concentration. In the anti-inflammatory test, P. ussuriensis leaf extract inhibited generation of nitric oxide (NO) stimulated by LPS in the macrophage cell line (raw 264.7) after 12 to 24 hours. As above results, P. ussuriensis has a great potential as a cosmeceutical raw material as well as anti-oxidant and anti-inflammatory ability.

• Journal of the Korean Society of Food Science and Nutrition
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• v.31 no.3
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• pp.500-505
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• 2002

Many studies have shown that hyperglycemia leads to an increase of lipid peroxidation in diabetic patients and animals, reflecting a rise reactive oxygen species production. It is increasingly recognized that brain is another site of diabetic organ damage. Accordingly, this study was to investigate the effect of dandelion on oxygen free radical generating and scavenging system of brain in streptozotocin (STZ)-induced diabetic rats. Male Wistar rats were divided into diabetic (control) and diabetic-dandelion supplemented groups. Dandelion was supplemented for 4 weeks with dandelion leaf and root powder (DLP, DRP) or dandelion leaf and root water extract (DLW, DRW) based on 11.4 g of raw dandelion/kg diet. Diabetes was induced by single injection STZ (55 mg/kg B.W., i.p.)in a citrate buffer. Oxygen free radical generating enzymes, cytochrome P-450, amino-pyrine N-demethylase, aniline hydroxylase and xanthine oxidase, were lowered in dandelion supplemented-groups compared to the control group. Superoxide dismutase, catalase and gluthathione peroxidase activities of brain were also lower in dandelion leaf and root supplemented-group than in the control group, whereas glutathione S-transferase activity and gluthathione content were increased in dandelion supplemented-groups compared to the control group. With regard to the lipid peroxidation products, the malondialdehyde content of brain was lower in dandelion supplemented groups. Therefore, it could be suggested that powder and water extract of dandelion leaf or root are beneficial in preventing diabetic complication from lipid peroxidation and free radical in brain of diabetic rat brain.

• Applied Biological Chemistry
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• v.47 no.2
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• pp.244-250
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• 2004

Biological activities and application of Sanguisorbae officinalis L. were investigated. In the enzymological physiological activities, the electron donating ability (EDA) was 54.9% in 10 ppm and it was over 90% over 50 ppm and SOD-like activity was high as 65.4% in 1000 ppm, it was gradual increased. As inhibitory effect of xanthine oxidase, it was 17.9% in 200 ppm and little low as 36.9% in 500 ppm and inhibitory effect of tyrosinase. As the result of measuring the lipid oxidation, all the concentrations of medical ion treatments had the ability to keep it from acidification and metal ion blocking effects about the lipid oxidation promoting factors ($Fe^{2+}$ and $Cu^{2+}$), $Fe^{2+}$ was better than $Cu^{2+}$ and all concentrations of medical ion treatments was 40% in 50 ppm. When it was applied into normal skin-softener it showed safe effect so that we can expect that as the natural material of cosmetics.

• Journal of Life Science
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• v.17 no.12
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• pp.1734-1738
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• 2007

The biological activities of strawberry were investigated during frozen storage. The concentrations of total phenolic content in strawberry juice and water extract were $2.342{\mu}g/ml\;and\;2.235{\mu}g/ml$, respectively. The total flavonoid content in strawberry juice and water extract were $200.36{\mu}g/ml\;and\;201.07 {\mu}g/ml$. respectively. Antioxidant activities of strawberry juice and water extract were determined. The DPPH of strawberry juice (94.2%) was higher than the water extract of strawberry (93.5%). ABTS of strawberry juice and water extract were 99.9% and 100.0%, respectively. Xanthine oxidase inhibitory activity and SOD-like activity of strawberry of water extracts were higher than those of strawberry juice. The changes in the antioxidant activity of strawberry was insignificant until 6 months of frozen storage. Therefore, it was expected that frozen storage of strawberry was useful preservation expedient for consistent supply of raw materials.

• Journal of Life Science
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• v.12 no.3
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• pp.332-339
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• 2002

The pathogenesis of cholestatic liver injury as well as the modulation of hepatic fibrogenesis is causally associated with involvement of reactive oxygen species and free radical reactions. In this study, we investigated whether flavonoids (fustin, sulfuretin) which were isolated from Rhus verniciflua Stokes (RCS) have antioxidant and antihepatotoxicity effect under the biliary liver fibrosis condition. After surgery (control) and posttreated RCS methanol extract (250mg/kg), ethyl acetate extract (250mg/kg) and flavonoids were administered p.o. 10mg/kg/day in two weeks for control groups. The concentration of clinical parameters and product of hepatic lipid peroxidation and the hydroxyproline content were significantly increased in liver fibrosis developed rats. Among the clinical parameters of serum, value of ALT, AST, SDH, total bilirubin and ${\gamma}$ -GT in posttreated RCS components-group showed significantly lower than in control-group. The content of hydroxyproline in posttreated RCS components-group showed lower than in control group and then the value of MDA in posttreated RCS components-group was also significantly reduced to 40~60% of that in control group. The hepatic xanthine oxidase and aldehyde oxidate activities were posttreated RCS components-group showed significantly lower than in control-group. The hepatic SOD and glutathione peroxidase activities were posttreated RCS components-group showed significantly higher than in control-group. Hence we concluded that active components of fustin and sulfuretin which were isolated from R. verniciflua Stokes were hepatoprotective effect in experimental liver fibrosis.

• Journal of the Korean Society of Food Science and Nutrition
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• v.26 no.4
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• pp.675-681
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• 1997

This study was conducted to investigate the effect of dietary protein and fiber levels on the activities of ethanol metabolizing enzymes of liver in ethanol-treated rats. Sprague-Dawley male rats were fed on diets containing two levels of protein(7, 20%/kg diet) and pectin(5, 10%/kg diet). In ethanol experiments, ethanol(25% v/v) was administered by oral intubation(5g/kg body weight) at the same time once a day Control animals received an isocaloric dose of sucrose. The rats were sacrificed after 5 weeks of feeding periods. Alcohol dehydrogenase and microsomal ethanol oxidizing system activities of hepatic tissue were increased more in ethanol-treated groups than in control groups. Increment of activities predominated in normal protein normal fiber group. Aldehyde dehydrogenase activity was decreased in ethanol-treated groups and significantly decreased in normal Protein normal fiber group. Cytochrome P-450 content was significantly increased in ethanol-treated groups and Predominated in normal protein groups. Xanthine oxidase activity was increased in ethanol-treated groups, but not significantly except normal protein normal fiber group. Glutathione content tended to increase in proportion to level of dietary protein and was higher in normal fiber groups than in high fiber groups, whereas it was decreased by ethanol treatment. Lipid Peroxide content was significantly increased in low Protein normal fiber groups.

• Journal of the Korean Society of Food Science and Nutrition
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• v.36 no.9
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• pp.1113-1119
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• 2007

Water extracts from root, stem and leaf of Ailanthus altissima were utilized to determine antioxidant properties such as electron donating ability (EDA), nitrite scavenging ability, superoxide dismutase (SOD)-like activity, and the inhibitory activities of xanthine oxidase (XO) and tyrosinase. The EDA of root extract was the highest as 77.33% at 0.5 mg/mL concentration and that of stem extract was 70.01% at 1.0 mg/mL. The nitrite scavenging ability of leaf extract revealed the highest effect as 95.18% at pH 1.2, 1.0 mg/mL while those of stem and root extracts were 55.17% and 33.33%, respectively. The leaf extract showed the highest SOD like activity as 26.77% at 1.0 mg/mL, the measurement of root extract was 3.82% and that of stem extract was not effective. All kinds of extracts had strong inhibitory activities on XO of over 92% at 1.0 mg/mL. The highest activity on tyrosinase inhibition was obtained from leaf extract of 16.33% at 2.0 mg/mL. The results indicated that among the three extracts, the leaf extract has a strong and extensive antioxidant activity.