• Journal of the Korean Society of Food Science and Nutrition
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• v.34 no.3
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• pp.317-322
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• 2005

This study was carried to investigate the inhibition effects of Lepista nuda mushroom extracts on the growth of the human cancer (HepG2, KATOⅢ, AGS) cells. The fraction Ⅰ of Lepista nuda mushroom extracts strongly inhibited to 71.4-91.8% for the growth of cancer cells. The growth of cancer HepG2, KATOⅢ and AGS cell which treated with 0.5 and 1㎎/mL of hot water fraction I was inhibited to 71.4% and 85.5%, 45.0% and 86.6%, 71.6% and 90.7% respectively. The growth of cancer cell HepG2, KATOⅢ and AGS which treated with 0.5 and 1㎎/mL of microwave fraction I was inhibited to 79.8% and 85.2%, 78.6% and 88.9%, 85.8% and 91.8%, respectively. The inhibition ratios of cancer cell growth were higher by microwave extracts than hot water extracts. And the more fraction were insoluble for water, the more inhibition ratios of cancer cell growth were lower.

• Journal of Nutrition and Health
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• v.12 no.3
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• pp.25-32
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• 1979

In order to investigate harmful trace elements in ford additives used in food processing the contents of Copper, Lead, Cadmium, Chromium, Manganese, Nickel and Iron are determined by Atomic Absorption Spectrophotometer. These Elements are Extracted with APDC-MIBK extract method. Samples are collected from the food Industrial companies in Korea. Samples studied as shown in Table 1 are food colors(3-samples, Flavoring Agents(7-samples), Acidifiers(4-samples) Baking Powders(4-samples), Emulsifiers(2-samples), Thickeners(2-samples), Antioxidants(2-samples), Intensifiers(2-samples), Seasonings(3-samples), modifiers (10-samples) Most of the food additives contained comparatively a little small amount of harmful trace elements. However, the contents of harmful trace elements of Sodium Carbonate, Food Yellow No.5, Food Blue No.1, Food Red No.2 and Alkalies added in noodles are significantly higher than the other food additives. The obtained results are as follows ; 1) Sodium Carbonate contained Cadmium; 16.73 ug/g and Lead ; 61.55 ug/g. 2) Food Yellow No. 5 contained Cadmium: 1.67ug/g and Lead; 23.46 ug/g. 3) Food Blue No. 1 contained Cadmium; 1. 16 ug/g and Lead; 23.46 ug/g. 4) Food Red Ho. 1 contained Cadmium; 1.91 ug/g and Lead 23.08 ug./g. 5) Alkalies added in noodles contained Cadmium; 6. 11 ug/g and Lead; 53.85 ug/g.

• Proceedings of the IEEK Conference
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• 2000.11a
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• pp.381-384
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• 2000

In this paper, we designed and fabricated a low noise amplifier which can be used in W-CDMA. For improving input VSWR and stability an emitter inductance series feedback was used, and for acquiring higer linearity at low current DC bais by-passing method was used. Fabricated low noise amplifier had 15.33 ㏈ power gain, 2.17 ㏈ NF, -9.53 ㏈ $S_{11}$ and -35.91 ㏈ $S_{22}$ at 2.16 GHz, and +5.34 ㏈m II $P_{ 3}$ at 10 MHz channel spacing.g.g.g.

• The Microorganisms and Industry
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• v.19 no.1
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• pp.19-25
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• 1993

G7 신기능 생물소재기술 개발사업은 '91년 5월부터 한국유전공학연구조합을 주축으로 산.학.연의 전문가 50여명이 대거 참여하여 기본계획을 수립하고 중점 연구개발 과제를 도출하였다. 이와같이 기획 선정된 9개의 연구개발 과제는 '92년 6월 종합과학기술 심의회 연구기획평가 위원회에서 심의 확정되어 연구개발을 착수하기에 이르렀다. 본고에서는 G7 연구개발사업의 추진 배경을 살펴보고 신기능 생물소재기술 개발사업의 기본 목표와 추진 형황을 약술하고자 한다.

• Journal of Food Hygiene and Safety
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• v.31 no.3
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• pp.210-215
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• 2016

This study was performed to provide basic data of Cirsium setidens Nakai by cultivars that will be applied for development of functional foods and ingredients. We assessed pectiolinarin content, total flavonoids content and antioxidant effects (DPPH radical scavenging activity and ORAC assay) of C. setidens Nakai. Our results showed that the pectolinarin and total flavonoids contents of C. setidens Nakai by cultivars ranged from $3.95{\pm}0.05$ to $7.29{\pm}0.07mg/g$ and from $40.42{\pm}0.91$ to $76.70{\pm}2.24mg$ pectolinarin equivalent (PNE)/g, respectively. Among C. setidens Nakai by cultivars, the pectolinarin content was highest in GW-D extract. Futhermore, the DPPH radical scavenging activity of C. setidens Nakai ranged from 31.25 to 81.93%, respectively. The oxygen radical absorbance capacity (ORAC) value was highest in GW-D and GW-E extracts (514.49 and $501.73{\mu}M\;TE/g$, respectively). These results suggest that C. setidens Nakai extract could be considered as a good sources of natural antioxidants and functional food ingredients.

• Proceedings of the Korean Society for Food Science of Animal Resources Conference
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• 1997.06a
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• pp.91-91
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• 1997

• Proceedings of the Korean Vacuum Society Conference
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• 2006.08a
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• pp.91-91
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• 2006

• Journal of Life Science
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• v.24 no.4
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• pp.419-427
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• 2014

In order to examine antioxidative characteristics of Artemisia capillaris response surface methodology was used to optimize the hot water extraction process by analyzing and monitoring the extraction condition. For total phenolic compounds content, the optimal extraction temperature, time and amount of solvent per sample were $94.50^{\circ}C$, 2.06 hr and 25.03 ml/g, respectively. Also, the optimal conditions for electronic donating ability were $91.82^{\circ}C$, 2.90 hr and 20.88 ml/g, respectively. The nitrile scavenging ability (pH 1.2) was optimized using the extraction temperature of $97.36^{\circ}C$, extraction time 2.75 hr and 15.19 ml/g as the amount of solvent per sample. Regression equations of total phenolic compounds content, electron donating ability and nitrile scavenging ability as dependent variable were deduced from each analyzed extraction condition. And finally, their response surfaces were superimposed with the optimal conditions to obtain values for each extraction process factor. The predicted results through superimposing were extraction temperature $90{\sim}95^{\circ}C$, extraction time 2.5~3.5 hr and amount of solvent per sample 17~24 ml/g.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.14 no.1
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• pp.91-97
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• 2021

ISO/IEC 15118 is an international communication standard for EV(electric vehicle)'s V2G implementation. In the charging/discharging control of an EV based on a communication protocol, there is inevitably a time delay when charging/discharging occurs, and the delay may limit in supplying power flexibility. In this paper, we implemented an ISO/IEC 15118-based V2G emulator and measured the charge/discharge response characteristics. As a result, the time delay appeared as 0.12ms. Accordingly, the power flexibility markets that EV can participate in under the current standard were explored.

• Journal of Bio-Environment Control
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• v.26 no.2
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• pp.115-122
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• 2017

Objective of this research was to investigate the influence of lowered substrate pH on the reduction of bicarbonate injury in the vegetative growth of 'Ssanta' strawberry. The acid substrate was formulated by mixing sphagnum peat moss with pine bark (5:5, v/v) and the pH, EC, and CEC of the substrate were 4.07, $0.46dS{\cdot}m^{-1}$, and $91.3cmol^+{\cdot}kg^{-1}$, respectively. To adjust the pH of acid substrate, various amount of dolomitic lime [$CaMg(CO_3)_2$] were incorporated with the rate of 0 (untreated), 1, 2, 3, and $4g{\cdot}L^{-1}$. Then, mother plants were transplanted and grown with fertilizer solution containing $240mg{\cdot}L^{-1}$ of the $HCO_3{^-}$ and equal concentrations of essential nutrients to Hoagland solution. In growth of 'Ssanta' strawberry, fresh weight of mother plants were the highest in the treatment of $2g{\cdot}L^{-1}$ dolomitic lime such as 102.1 g followed by 94.7 g in $1g{\cdot}L^{-1}$, 91.2 g in $3g{\cdot}L^{-1}$, 75.7 g in $0g{\cdot}L^{-1}$ and 72.3 g in $4g{\cdot}L^{-1}$ treatments. The dry weight showed a similar tendency to fresh weight. At 140 days after transplanting, 5.8, 9.8, 11.8, 8.8, and 5.0 daughter plants were derived from each of the mother plants in the treatments of 0, 1, 2, 3, and $4g{\cdot}L^{-1}$ dolomitic lime, respectively. The highest occurrence of daughter plants were observed in the treatments $2g{\cdot}L^{-1}$ dolomitic lime. The substrate pH and bicarbonate concentration of 'Ssanta' strawberry seedlings in the 1 and $2g{\cdot}L^{-1}$ dolomitic lime treatments were maintained at a proper range such as 5.6 to 6.2. The micro-nutrient contents of above ground tissue in mother plants were the highest in $2g{\cdot}L^{-1}$ and the lowest in $4g{\cdot}L^{-1}$ dolomitic lime treatment. The above results indicate that incorporation rate of dolomitic lime in acid substrate with the pH of around 4 is $2g{\cdot}L^{-1}$ to raise the 'Ssanta' strawberry in propagation.