• Korean Journal of Food Science and Technology
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• v.34 no.4
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• pp.617-624
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• 2002

Health drinks were prepared with freeze dried powder of 60% ethanol extract (60% EFDP), 60% ethanol extract after hydrolysis with amyloglucosidase (60% AEFDP) and 80% ethanol extract (80% EFDP) from roasted safflower seed. Quality characteristics and antioxidative properties were investigated. Yield of freeze dried powders were ranged in $4.67%{\sim}5.62%$. Brix, pH and titratable acidity of safflower drinks were ranged in $11.4{\sim}14.2%$, $2.83{\sim}3.34$ and $0.09{\sim}0.91%$, respectively. Content of total phenolic compounds was much more in 80% EFDP (117 mg/g) and safflower drink-I (SD-I, 440 ppm) than others. Content of total flavonoid was observed in higher level in 60% EFDP (49 mg/g) and safflower drink-V (SD-V, 138 ppm) than others. Antioxidant compounds such as N-[2-(5-hydroxy-1H-indol-3-yl)ethyl]ferulamide(serotonin-I) and N-[2-(5-hydroxy-1H-indol-3yl)ethyl]-p-coumaramide(serotonin-II) exhibited higher contents of 21.09 ppm, 33.56 ppm in 60% EFDP and of 3.83 ppm, 5.81 ppm in safflower drink-II (SD-II) than others. Content of acacetin was much more in 80% EFDP (13.53 ppm) and safflower drink-IV (SD-IV, 1.14 ppm) than others. From the DPPH test to measure antioxidant activity, it was shown that 80% EFDP and SD-I have stronger scavenging activities of 94.58% and 94.88%, respectively, while BHA standard solution does 93.88%. Among drinks, SD-II was revealed to have highest level on overall acceptance, color and flavor through sensory evaluation. These results induced that safflower seed can be used as natural antioxidant and functional food material.

• Journal of Applied Biological Chemistry
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• v.61 no.2
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• pp.125-130
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• 2018

The quality and microbiological characteristics of various Mul-kimchi prepared with addition of 0.02, 0.05, and 0.1% (w/v) chlorella water extract (CWE) were investigated during fermentation for 7 days at $10^{\circ}C$. The addition of CWE powder stimulated the growth of lactic acid bacteria and considerably improved the acid production. After 6 days fermentation, titratable acidity of CWE Mul-kimchi was 0.16-0.19% and was higher than that (0.14%) of Mul-kimchi made without CWE. The lactic acid bacterial counts were increased rapidly in CWE Mul-kimchi during fermentation for 4 days. The sensory quality of Mul-kimchi added with 0.05-0.1% CWE powder lightly enhanced in taste and overall acceptability among the tested Mul-kimchis preparations. When CWE Mul-kimchi preparations fermented for 6 days were incubated at $4^{\circ}C$ for 15 days, their titratable acidities were continuously increased up to 0.21-0.26% but number of viable lactic acid bacteria were well maintained above $10^7CFU/g$ through storage period.

• Food Science and Preservation
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• v.18 no.1
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• pp.79-86
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• 2011

Three bark extracts of Albizia julibrissin were prepared using water (AW), 70% (v/v) ethanol (AE), and hot water (AHW). Organic solvent fractions were analyzed for total flavonoids and polyphenols, antioxidant activities, and inhibitory activities against xanthine oxidase. Total flavonoid and polyphenol contents of the AHW extract were 8.57 mg/g and 108.67 mg/g, respectively. The SOD-like activities of all extracts, assayed at 1.0 mg/mL, were 10.46-16.73%. The nitrite-scavenging ability of the AHW extract, assayed at pH 1.2, was 60.82%, and the $IC_{50}$ value was $770.18\;{\mu}g$/mL. The electron-donating ability of the AHW extract, at 0.3 mg/mL, was 92.30%; the $IC_{50}$ values of the AW and AHW extracts were $31.31\;{\mu}g$/mL and $36.22\;{\mu}g$/mL, respectively; thus higher than that of ascorbic acid ($39.06\;{\mu}g$/mL). Xanthine oxidase inhibition by the AHW extract, at 1.0 mg/mL, was 94.05%. These results indicate that the AHW of A. julibrissin has potential as a natural antioxidant, for addition to foods and nutraceuticals.

• Journal of the East Asian Society of Dietary Life
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• v.1 no.3
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• pp.299-304
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• 1991

In this study the effects of water extracts of endocarps and seeds of omija(Schizandra chinensis Baillon)on alcohol metabolism in rats were investigated. 25% alcoholic solution(v/v,0.75g/200g B.W.)and 40% alcoholic solution(v/v,0.80g/200g B.W.)were orally administered to rats for 2 hours. The levels of metabolites and enzyme activities both on serum and liver were not changed by acute oral adminiatration of 25% and 40% alcoholic solution. Blood alcohol levels were significantly lowered by treatment of water extracts of endocarps and seeds of omija in rats administered with 25% and 40% alcohol. In 25% alcohol treated group, serum GPT level was decreased but hepatic G-6-P DH and pyruvate levels were increased. In 40% alcohol treated group, water extracts of endocarps and seeds of omija resulted in a significant decreased in serum levels of FFA, GPT but increased in serum glucose level. Hepatic levels of cytosolic protein, glycogen and pyruvate were increased by water extracts of omija parts in 40% alcohol treated group.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2009.04b
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• pp.99-100
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• 2009

탄화규소를 이용한 1200V급 MOSFET 소자 제작을 위하여 특성 simulation을 수행하였다. 1200V 내압을 얻기 위해서 불순물 농도가 5E15/cm3이고 에피층의 두께가 12um인 상용 탄화규소 웨이퍼를 기준으로 하였으며 채널 저항을 줄이기 위해 채널길이를 $0.5{\mu}m$로 하였다. 게이트전압이 13V, 드레인 전압이 4V에서 specific on-resistance 값은 $12m\;{\Omega}cm^2$로 매우 우수한 특성을 보이고 있다. P-body의 표면 농도를 5E16/cm3 에서 1E18/cm3으로 변화시키면서 소자의 전기적 특성을 예측하였으며 실험 결과와 비교하여 특성 변수를 추출하였다.

• Journal of the Korean Society of Radiology
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• v.13 no.7
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• pp.961-968
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• 2019

The purpose of this study was to evaluate the usefulness of cerebral angiography in each energy level by using dual energy technique in CT. Methods were performed on 15 DE images and SE images of CT angiography. For the analysis of images, mean value, standard deviation, SNR and CNR value were determined by setting ROI on MCA, brain parenchyma tissue, and back ground. As a result of concurrent visual evaluation with Likert 5 point scale, the clearest MCA image was confirmed at DE 40 keV and SE 120 kVp(p>0.05). The SNR value of the SE image was measured to be similar to the 40 keV energy level of the DE image. The low energy level image of 40 keV and 50 keV was measured with a high SNR and the contrast ratio was higher than that of the high energy image.

• Microbiology and Biotechnology Letters
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• v.49 no.3
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• pp.283-288
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• 2021

This study investigated the anticancer activity of methanol extract from Platycarya strobilacea leaf in AGS human gastric cancer cells. We determined the cell viability effect of P. strobilacea using MTS assay. Apoptosis induction and cell cycle arrest were confirmed by fluorescein isothiocyanate and propidium iodide staining using cellometer K2. The mRNA expression levels of the Bcl-2 family were confirmed by reverse transcription-polymerase chain reaction. The cell viability was decreased in a dose-dependent manner treated with different concentrations of P. strobilacea. Total, early, and late apoptotic cells were dramatically increased, and the cell cycle was arrested at the sub-G1 phase. The mRNA expressions of Bcl-2 and Bcl-xL were reduced, whereas pro-apoptotic factors, Bax and Bak, were increased in a dose-dependent manner. These results suggested that P. strobilacea leaf extract induced significant apoptotic activity through an intrinsic mitochondria pathway.

• Resources Recycling
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• v.16 no.3 s.77
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• pp.34-43
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• 2007

A comparative study of the extraction behavior of vanadium and titanium in sulphate solutions using Cyanex272, PC88A and Alamine336 has been carried out. effect of pH in sulphate solutions, concentration of extractant and extraction isotherms has been studied. Solvent extraction separation studies of vanadium and titanium from the mixed solutions were also carried out in order to obtain a criterion for choosing the more effective extraction regent. From the experimental results, it was conformed that Alamine336 was good extractant to extraction of vanadium and separation from titanium from the mixed solutions.

• Journal of the Korean Society of Food Science and Nutrition
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• v.36 no.4
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• pp.383-388
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• 2007

Physiological activities of Agaricus bisporus extracts were examined. Nitrite-scavenging activity, superoxide dismutase (SOD)-like activity and electron-donating ability (EDA) of Agaricus bisporus extracted with water, 50%, and 100% ethanol were measured. Nitrite- scavenging activities at pH 1.2 were the most effective in water and 50% ethanol extracts from brown and white Agaricus bisporus samples. SOD-like activities of water and 50% ethanol extracts of both samples were $19.02{\sim}55.42%$ lower than those of 1.0% and 0.1% L-ascorbate solutions. SOD-like activities of brown Agaricus bisporus extracts were higher than those of white Agaricus bisporus extracts, and water extracts of the samples were the highest. EDAs of brown Agaricus bisporus extracts were higher $(40.35{\sim}66.54%)$ than those of white Agaricus bisporus extracts, while those of both extracts were lower than 1.0% and 0.1% L-ascorbate solutions. The results will be useful for understanding the physiological activities of Agaricus bisporus extracts.

• Journal of the Korean Society of Food Science and Nutrition
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• v.35 no.3
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• pp.301-306
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• 2006

Physiological activities of Allium tuberosum and Allium senescens were examined. Nitrite-scavenging activity, superoxide dismutase (SOD)-like activity and electron-donating ability (EDA) of leeks extracted with water, 50%, and 100% ethanol were measured. Nitrite-scavenging activities at pH 1.2 were most effective in water and 50% ethanol extracts from both samples. SOD-like activities of water and 50% ethanol extracts of both samples were $18.21{\sim}36.33%$ lower than those of 1 and 0.1% L-ascorbate solutions. SOD-like activities of A. tuberosum extracts were higher than those of A. senescens extracts, and water extracts of samples were the highest. EDAs of A. tuberosum extracts were higher ($30.59{\sim}49.68%$) than those of A. senescens extracts, while those of both extracts were lower than 1 and 0.1% L-ascorbate solutions. The results will be useful for understanding the physiological activities of leek extracts.