• 한국염색가공학회지
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• 제12권5호
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• pp.315-322
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• 2000

The purpose of this study was to investigate the antibacterial effects of natural colors extracted from yellow natural dyes(Tumeric, Amur Cork Tree and Onion Shell). The water and the methanol extracts of Tumeric and Amur Cork Tree significally decreased the growth of E. coli in vitro and the methanol extract of Tumeric exhibited the strongest inhibitory effect among the samples. Silk and nylon fabrics dyed with water and methanol extracts of the yellow natural dyes showed antimicrobial activities against E. coli and Staph aureus in the Bioassay Test. Nylon fabric dyed with methanol extracts of them showed strong antibacterial effect on E. coli compared with that of water extracts. However, slik fabrics dyed with the extracts could not reduce the growth of E. coli. Silk or nylon fabrics dyed with methanol or water extracts of yellow natural dyes showed antimicrobial activities against Staph aureus. The antimicrobial activity of the fabrics dyed with methanol extracts from Tumeric, Amur Cork Tree and Onion Shell was stronger than that of water extracts, especially, the fabrics dyed with Tumeric extract showed the highest antibacterial property among the dyed fabrics.

• 대한약학회:학술대회논문집
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• 대한약학회 2002년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.2
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• pp.415.2-415.2
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• 2002

We investigated the absorption enhancing effect of BuOH extract of the root of Aralia elata (BERAE) in Caco-2 cell monolayers and rats. At the concentration of both 0.04% and 0.08% (w/v). BERAE decreased the transepithelial electrical resistance (TEER) values and increased the permeability of intact chondroitin sulfate (CS) and its digestion products as hydrophilic macromolecules in a dose dependent manner. We also evaluated the cytotoxicity of BERAE for the determination of a proper concentration as an absorption enhancer. (omitted)

• 대한본초학회지
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• 제32권4호
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• pp.39-46
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• 2017

Objectives : This study aims to provide basic data about Portulacae Herba (PH) extracts as natural antioxidants by considering diverse antioxidant activities of PH depending on solvents. Methods : The samples of PH were pulverized, and A hot water and a 70% EtOH were stir-extracted for two hours three times repeatedly in a water bath with a temperature of 95 degrees and at room temperature respectively to measure 7 kinds of antioxidant activities. Results : There were significant differences in total phenol content, because the total phenol content of the 70% EtOH extract was higher than the hot water extract's, and the total flavonoid content of the 70% EtOH extract($4.40{\mu}g/mg$) was nearly 3.8 times higher than the hot water extract's($1.16{\mu}g/mg$). DPPH and ABTS radical scavenging activities were 70% EtOH extract showed a little higher activity than the hot water extract, and at a concentration of $500{\mu}g/mg$, the highest scavenging activity was found in the 70% EtOH extract, not in the control group. Hydroxyl radical and $Fe^{2+}$ chelatingactivities were slightly higher in hot water extract than in 70% EtOH extract, and increased in a dose-dependent manner. Nitrite scavenging activities increased dose-dependently in the hot water and the 70% EtOH extract, regardless of the pH level, and scavenging activity of the 70% EtOH extract was higher at pH 1.2 than at pH 3.0. Conclusions : In conclusion, it is thought that PH hot water and 70% EtOH extract have antioxidant activities, and can be used as natural antioxidants in future.

• 한국식품영양과학회지
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• 제27권6호
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• pp.1034-1040
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• 1998

The nutritional quality and physiological activity of cultivated hoelen from 13 months to 24 months were examined to compare with natural hoelen. General compositions of hoelen were as follows re spectively; crude protein 1.80~2.50%, crude fat 0.68~1.23%, crude ash 0.12~0.43%, crude fiber 6.30~7.14%, nitrogen free extract 89.25~90.44%. The major free sugar was glucose, and the content of 13 months cultivated hoelen was higher than any other cultivated hoelen. The major fatty acids of hoelen were linoleic acid, palmitic acid, stearic acid and oleic acid. The ratio of unsaturated fatty acids was 62.62~77.96% and the content was higher in cultivated hoelen than in natural hoelen. The contents of amino acid were high in the order of tyrosine, aspartic acid, glutamic acid and serine, and increased as the day of cultivation became longer. The contents of mineral components were higher in the order of Ca, K, Mg and the contents of Na and Ca were higher in natural hoelen than in cultivated hoelen. The contents of pachymic acid and dehydropachymic acid was similar in the natural and cultivated hoelen. On the results of antimicrobial test the ethanol extract showed a stronger effect than water extract, and had an excellent antimicrobial activity on Micrococcus luteus and Escherichia coli. The ethanol extract of hoelen showed comparatively strong electron donating ability. The ethanol extract of hoelen showed a high inhibition activity on the growth of lung cancer, ovary cancer, skin cancer, central nerve cancer and rectum cancer, especially the activity of 19 months cultivated hoelen was the highest. On the above results of nutritional quality and physiological activity of hoelen, it is supposed that the picking date of cultivated hoelen was suitable over than 19 months.

• Journal of the Korean Wood Science and Technology
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• 제45권1호
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• pp.116-125
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• 2017

본 연구는 폭쇄처리된 신갈나무로부터 유래된 열수추출물의 안전성 및 항산화성 효과에 대해 검토하였다. 안전성 시험으로는 세포독성실험, 경구투여 독성시험이 실시되었으며, 신갈나무 폭쇄처리 열수추출물의 항산화성 유무를 확인하기 위해서 실험동물은 일본 Air Logistics사의 4주령 B6C3F1 숫컷 생쥐로 다섯 군(1군 10마리)으로 나누어서 실험을 하였다. 신갈나무 폭쇄처리 열수추출물의 세포독성 및 경구투여 독성시험의 결과로 독성은 관찰되지 않았으며, 신갈나무 폭쇄처리 열수추출물의 투여군에서 과산화물분해효소의 활성이 29% 이상 증가하여 과산화물분해효소의 활성이 유의적으로 인정되었다. 따라서 신갈나무 폭쇄처리 열수추출물은 뛰어난 안전성과 항산화성이 있음을 확인하였다.

• 한국식품과학회지
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• 제33권6호
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• pp.760-763
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• 2001

본 연구는 앵두 과즙과 ethanol 추출액의 tyrosinase 활성억제효과를 조사하였다. 앵두과즙에 대한 tyrosinase 활성 저해효과는 반응 초기에 가장 높았으나 점차 감소하는 경향을 보였으며 앵두과즙의 농도가 높을수록 높은 저해율을 보였다. 앵두 ethanol 추출액의 tyrosinase 활성 저해효과는 ethanol 추출액에서 얻어진 추출물의 농도가 높을수록 증가하였으며 70%(v/v) ethanol 추출액에서 가장 높았다. 한편 70%(v/v) ethanol 추출액의 전처리 시료중 ethyl acetate층이 73.8%의 높은 tyrosinase 활성 저해율을 보였다. 이는 앵두의 특정성분이 tyrosinase 활성을 저해하는 것으로 판단되어 기능성을 나타내는 물질에 대한 정성 및 정량의 추가적인 연구가 필요하다.

• 한국의류산업학회지
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• 제21권1호
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• pp.112-119
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• 2019

This study had a purpose of further investigating and developing the usage of the eco-friendly functional dye that has physiological and pharmacological functions. This study was implemented complex dyeing method which used both natural dyes such as Gardenia jasminoides J.Ellis colorant, which are the yellow dyes that have high brightness and low chroma, and Xanthium strumarium L. extract. The silk fabrics were used to dye in various methods. They were also used to investigate functionalities dyed fabrics by various treating method, such as their color fastness, antibacterial activities and deodorization, the following were obtained. The fabrics that were dyed with herbs had decreasing brightness as the herbs extract concentrations were increased and had subtly changing chroma. But, because their K/S values were under 0.5, they were not properly dyed. Color fastness differed according to the natural dyes and herbs' complex dyeing order. The Color fastness was good when the fabrics were dyed with the colorant first, and then with the herb. When the fabrics were dyed with mixture dyeing solution, the natural dye and the herb extract, the herb didn't affect the dyeabilities of fabrics as much. When the fabrics were dyed with the mixture of the colorant and the herb extract, the dyeabilities didn't have much changes. However, their color fastnesses were improved a little bit due to the complex dyeing condition. When the fabrics were dyed with the mixture of the colorant and the herbs extract, their antibacterial activities and deodorization were increased.

• 한국식생활문화학회지
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• 제35권6호
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• pp.577-581
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• 2020

This study examined the physicochemical properties of radish pickle containing different natural preservatives (grapefruit seed extract, green tea extract, rosemary, or olive) stored for 0, 1, 2, 3, and 4 weeks. The hardness and color of the radish pickles with the grapefruit seed extract was higher than the other radish pickles during storage from week 0 to week 4. A 14.52% and 13.80% decrease in hardness and color were observed in the radish pickles with grapefruit seed extract (GFE), respectively. In addition, the total phenolic content was highest in the GFE in natural preservatives. Based on the results, GFE was selected as the optimal natural preservatives, and the growth of total viable bacteria and yeast were evaluated. The total viable bacteria and yeast showed similar patterns to the control. These results are expected to be useful in producing radish pickles with optimal quality and contribute to the development of various foods in the food industry.

• Applied Biological Chemistry
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• 제47권3호
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• pp.287-292
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• 2004

Phellinus igniarius 26005에 의한 lignin peroxidase의 생산 조건의 최적화를 검토하였다. Lignin peroxidase는 진탕배양보다는 정치배양에서 생산성이 높았으며 최적 생산배지는 malt extract 1 g, yeast extract 0.4 g, glucose 0.4 g, 증류수 100 ml이었다. 효소 생산 유도 물질, Tween 80을 0.005% 수준으로 첨가하였을 때 가장 높은 효소 생산성을 보였으며 veratryl alcohol도 0.4 mM 수준에서 생산성 향상을 나타내었다.

• 대한수의학회지
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• 제45권1호
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• pp.113-119
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• 2005

Resistance to antibiotics is a problem all over the world, and this problem also is so extended in veterinary fields. Therefore, this study aimed to find out the antibacterial substances from natural medicinal herbs against bovine mastitis pathogens, especially methicillin-resistant Staphylococcus aureus (MRSA). Among seventy two medicinal herbs, Terminaliae chebula extract showed antimicrobial effect against MRSA isolated from mastitis milk in cow and patient in human. However, Terminaliae chebula extract didn't show antibacterial effects on various strains including other contagious and environmental pathogens related with mastitis of dairy cows.