• Food Science of Animal Resources
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• v.22 no.3
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• pp.267-273
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• 2002

The functional properties of egg shell membrane hydrolysate by Bacillus licheniformis(EESMH) and NaOH-ethanol(AESMH) as a food material were investigated.. The yield of egg shell membrane hydrolysate was about 15% by Bacillus licheniformis, whereas that was 70% by NaOH-ethanol. Histidine content was higher in EESMH (18.69%) than in AESMH (2.56%). Both EESMH and AESMH showed high protein solubility (>95%). Emulsi-fying activity and stability of EESMH were higher than those of AESMH. foaming capacity and stability of AESMH were 2 times higher than those of EESMH in the pH ranges from 2 to 12. The AESMH had antioxidative activity whereas EESMH had not. Therefore, both AESMH and EESMH can be used for industrial food materials from the results of functional properties.

• Journal of Applied Biological Chemistry
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• v.57 no.4
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• pp.353-358
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• 2014

Antioxidant activities of ethanol and water extracts of flesh, leaves, and peels of green and purple Kohlrabi were measured by rancimat method, total phenolic compound (TPC), DPPH radical scavenging effect, chelating effect, and reducing power analysis. The highest TPC was observed in ethanol extract from green peel and water extract from purple leaf with 12.00 and 11.70 mg/g of dry sample, respectively. The ethanol extracts from purple Kohlrabi leaf and peel exhibited strong DPPH radical scavenging effects with reducing power while water extracts from purple Kohlrabi leaf and peel also showed strong DPPH radical scavenging with chelating effects. Antioxidant index of ethanol and water extracts from green and purple Kohlrabi measured by rancimat was lower than butylated hydroxytoluene. These results suggest that extracts from purple Kohlrabi leaf and peel exhibited higher antioxidant activities than those of green Kohlrabi, and can be potentially used as proper natural antioxidants.

• Korean Chemical Engineering Research
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• v.48 no.6
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• pp.700-703
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• 2010

In this study, plant extracts including Eucommia ulmoides Oliv. and Phellodendron amurense were studied to test possible application for cosmetics and skin related medicine. Anti-oxidation effect of plant extracts was measured by DPPH free radical scavenging activity and it was insignificant at low concentration, however, it was as good as vitamin C, excellent anti-oxidation agent, at $1000{\mu}g/ml$. Anti-bacterial effect was tested by disc diffusion method, and plant extracts showed mild anti-bacterial effect for normal skin flora, Staphylococcus epidermidis while it indicated strong anti-bacterial effect for acne inducing Propionibacterium acne. Therefore it had powerful potential for anti-acne material because of selectivity. Anti-atopic dermatitis effect was tested by hairless mouse and plant extracts recovered damaged skin to near normal condition after 14 days of treatment. IgE concentration in treated mouse was decreased 16% compared with control. From the research, plant extracts indicated strong anti-acne and anti-atopic dermatitis effect, and showed strong potential for cosmetics and skin related medicine.

• Food Science and Preservation
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• v.11 no.1
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• pp.126-129
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• 2004

To elucidate the effect of various natural antioxidants on the safflower oil, rosemary extract, green tea extract, isoflavon, Phaffia rhodozyma extract, tocopherol, sesamol, and BRA as a control were added to the safflower oil and stored at 60$^{\circ}C$ for 4 weeks. During storage, its viscosity and antioxidative activity were determined. Viscosity of the oil increased with increasing storage period and was related with its antioxidative acvtivity. Antioxidative avtivity among antioxidants used in this study were in order of green tea extract>BHA>tocopherol>rosemary extract>isoflavon>sesamol>Phaffia rhodozyma extract. Green tea extract was the best in terms of antioxidative acvtivity. After 4 weeks, its peroxide value decreased up to 80.4％ of the control, and 42.1％ for acid value and 47.4％ for TBA value decreased.

• KSBB Journal
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• v.23 no.5
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• pp.431-438
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• 2008

For the experiment, to develop new materials for cosmetics, the Celosia cristata L. plant ethanol extract were used for physiological effect and cosmetics application research. The Celosia cristata L. is a Korean traditional variety grown. To investigate the effect of Ethanol extract of Celosia cristata L. on skin care, we measured anti-oxidant activity and anti-aging activity. Celosia cristata L. ethanol extract itself had anti-oxidant activity in a dose-dependent manner in 1-diphenyl-2-picryl-hydrazyl(DPPH) radical scavenging. Ethanol extract had anti-oxidant activity in a dose-dependent manner. Silica dose-dependently increased the intracellular ROS generation in RAW 264.7 cells. Celosia cristata L. ethanol extract inhibited silica-induced intracellular superoxide anion generation and $H_2O_2$ generation and hydro-peroxide generation in RAW 264.7 cells. For anti-aging effects, the hyaluronidase inhibition effects, were relatively strong and they also showed elastase activity inhibition effects, which suggesting the Celosia cristata L. ethanol extract might be used as hydration and anti-wrinkle agents. From the above results, it is referred that Celosia cristata L. ethanol extract appears to have potent anti-oxidant activity and anti-aging activity.

• Journal of the Korean Society of Food Culture
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• v.20 no.6
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• pp.703-708
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• 2005

This study was carried out to compare the antioxidant activities of the ether, butanol, water extracts from chestnut inner shell(Castanea crenata Sieb. et Zucc.) with those of tocopherol and BHA in soybean oil. All additives were added to soybean oil on the quantities of 0.02%. Comparing the antioxidant activities under autooxidation condition at $45.0{\pm}0.5$ for 42days of the extracts were recorded in the order of butanol>ether>control>BHA>tocopherol depending on the solvent. Under the condition at $60.0{\pm}0.5^{\circ}C$ for 32days, the butanol extracts represented the high antioxidation effect, however, there was no significant differences between the ether extracts and control. Under thermal oxidation condition, the ether extract showed stronger antioxidant activity than those of the butanol extract. In the results of polyphenol compound analysis, ellagic acid, quercetin, morin, naringenin, flavanol were included in the ether extracts and ellagic acid, naringenin, gallic acid, flavanol were included in the butanol extracts, respectively. Among them, ellagic acid in ether extract and gallic acid and naringenin in butanol extracts seed to increase the antioxidant activities in the substrate oil.

• Korean Journal of Food Science and Technology
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• v.30 no.4
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• pp.794-802
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• 1998

This study was conducted to investigate the effects of antioxidants on lipid oxidation in uncooked ground pork which was treated with ${\alpha}-tocopherol$, GFSE (grapefruit seed extract), carnosine and rosemary, respectively. The ground pork samples were uncooked and cooked during 10 days of storage at $4{\pm}1^{\circ}C$, respectively. The lipid oxidation and fatty acids composition were analyzed for over a periods of storage day. From the results mentioned above, antioxidative activity on lipid oxidation of uncooked ground pork appeared to be in order of carnosine > rosemary > ${\alpha}-tocopherol$ > GFSE. It would not be problem that addition of carnosine in uncooked ground of resulted in an increase of pH because the high pH could be advantageous on processing of meat. Antioxidative activity on lipid oxidation of cooked ground pork appeared to be in order of carnosine > rosemary > ${\alpha}-tocopherol$ > GFSE. Although the antioxidants were not lost their antioxidative }ctivities after cooking, their antioxidative activities in cooked ground pork were not higher than that of uncooked ground pork. That addition of carnosine increased the pH of cooked ground pork, too.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2018.04a
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• pp.103-103
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• 2018

홍경천은 일반적으로 해발 2500~4500m에 자생하는 고원식물이다. 현재 중국에 알려진 홍경천의 종류는 대략 38종으로 알려져 있으며 이 가운데 10종이 보건식품으로 사용되어지고 있다. 중국 홍경천의 생육환경은 동북부지방, 서북부지방, 서남부지방으로 구분되어지고 있다. 이 가운데 동북부지방과 티베트 지방을 중심으로 한 서남부지방의 홍경천이 주로 많이 사용되어지고 있다. 이러한 홍경천은 극한의 생육환경으로 고산병 예방, 피로회복, 작업능력향상, 운동능력향상과 세균의 저항력향상, 진정작용과 강심작용, 조혈작용, 항산화작용등이 신경전달물질의 활동을 증진시키어서 스트레스 해소와 치매 및 인지력을 높여준다고 알려져 있다. 따라서 근무 능력을 향상 시킬 뿐만 아니라 수험생들의 집중력에도 좋은 효과를 나타내는걸로 보고되고 있다. 따라서 본 실험에서는 홍경천의 총 폴리페놀 함량과 항산화 활성을 조사했던 바, 홍경천의 잎과 뿌리에서 양호한 결과를 나타내었으며, 특히 항산화 작용은 뿌리와 잎 추출물에서 양호한 반응을 보였다. 또한 에탄올 추출물 보다 메탄올 추출물 처리구에서 더욱 더 양호한 항산화 활성을 나타났다. 이러한 결과들을 바탕으로 홍경천 추출액을 첨가시킨 요구르트를 만들어서 품질을 조사하였던 바 요구르트 성분, 품질과 보존성이 향상되는 것을 확인할 수 있었으며 항산화 활성도 양호한 반응을 보였다.

• Korean Journal of Food Science and Technology
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• v.25 no.3
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• pp.214-219
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• 1993

Properties of the antioxidative fraction isolated from browning reaction product (BRP) that were obtained from 2 M L-ascorbic acid (AsA) solution (adjusted to pH 7.0) by heating for 25 hrs at $85^{\circ}C$ were investigated. Both of dialyzable and nondialyzable fraction isolated from BRP showed antioxidative effect. Dialyzable fraction has stronger antioxidative activity than nondialyzable. Dialyzable fraction was divided into the three fractions (A, B, C) by gel filtration. Among these fractions, the fraction (A) that had the highest reducing power and lowest browning drgree had lowest antioxidative activity. The fraction (C) that had lowest reducing power and highest browning degree showed strongest antioxidative effect. In the UV-visible spectrum of these fractions, the maximum absorption wavelengths of fraction A and B were 266.1 and 257.4nm, respectively, and fraction C showed a weaker absorption peak at 274.8nm. Infrared (IR) spectrum results showed that all fractions (A, B, C) had both hydroxy and carboxylic groups, and fraction B and C had carboxylic ester group.

• Proceedings of the Korean Nutrition Society Conference
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• 2000.06a
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• pp.112-112
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• 2000