• Proceedings of the Korea Society for Simulation Conference
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• 1998.03a
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• pp.70-73
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• 1998

본 연구에서는 광양제철소에서 철광석과 코크스를 이용하여 용선을 생산하는 고로공장과 이러한 용선을 용강으로 변화시키는 제강공장지역을 운행하는 기관차 및 TLC (Torpedo Ladle Car)의 용선 수성작업을 분석하여 기관차 및 TLC의 적정댓수를 산정하고, 운행 패턴의 변화에 따른 대안들을 검토하였다. 시뮬레이션은 AUTOMOD II를 이용하여 수행하였으며, 시뮬레이션에 이용되는 관련 기준 및 운행 패턴을 수집하여 확정하고, 실적치의 분포를 추정하였다. 시뮬레이션의 결과는 현장 전문가들의 이해를 높이기 위아여 Animation을 통하여 가시화하였다.

• YAKHAK HOEJI
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• v.31 no.6
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• pp.402-404
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• 1987

Fermentation processes have been employed to produce 17-ketosteroids from sterol with chelator of Fe$^{2+}$ such as $\alpha$, ${\alpha}'$-dipyriyl. To analyze the products of sterol fermentation, we developed a simple TLC method without interference of the chelator $\alpha$, ${\alpha}'$-dipyridyl, using Ag$^+$ band on TLC plate.

• KSBB Journal
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• v.13 no.4
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• pp.378-382
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• 1998

Agar hydorlysates or agarooligosaccharides from agar prepared by Cytophaga agarase showed eight spots on TLC plate and the degree of polymerization of the spots were in the reange of 2.5 - 6.5. Each component of the hydrolysate as tested the several functionalities such as antimicrobial activity, anticavity activity, and anticoagulant activity. The anticativity activity and anticoagulant acitvity were found in all fractions of hydrolysates and several spot on TLC, whereas the anticoagulant activity was very low.

• Analytical Science and Technology
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• v.6 no.4
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• pp.401-404
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• 1993

Rehmanniae Radix Preparata is manufactured with Rehmanniae Radix accoding to KP V. For quality control of Rehmanniae Radix Preparata, its standard component is required. The methanol extracts of Rehmanniae Radix crudus, Rehmanniae Radix, Rehmanniae Radix preparata were divided into the three groups of ether, butanol and aqueous fraction by liquid-liquid separation. In the comparative TLC of ether fraction, the characteristic component of Rehmanniae Radix preparata was found. The ether fraction was evaporated and separated on the silica gel column with chloroform-methanol and further separated on the preparative silica gel TLC with chloroform-methanol-water. The component was illucidated as 5-(hydroxymethyl)-2-furancarboxaldehyde(5-HMF). 5-HMF was not found in Rehmanniae Radix crudus and found in Rehmanniae radix in much less Quantities than Rehmanniae Radix Preparata.

• Journal of Korean Society of Steel Construction
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• v.24 no.1
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• pp.1-11
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• 2012

To overcome the limitations of current evaluation procedures for floor vibration under crowd loading, two kinds of uncertainties associated with individual time lag differences and the complex behavior of crowd should be taken into account. The complex behavior of crowds has yet to be fully described, even though individual differences can be dealt with statistically. This paper proposes time lag considered (TLC) crowd model based on a probabilistic approach. The load reduction factor, which reflects the effect of a general degree of synchronization among crowd, is proposed. Extensive Monte Carlo simulations were carried out to determine various crowd behaviors by using the TLC crowd model proposed. The TLC crowd model can rationally treat the energy loss of various crowd patterns. This indicates that it may be used as a theoretical basis in refining dynamic load factor of crowd loading.

• Korean Journal of Pharmacognosy
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• v.38 no.2 s.149
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• pp.187-191
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• 2007

The extraction yield of the methanolic extracts and 19${\alpha}$-hydroxyursane-type triterpenoid (19${\alpha}$-HUT) fraction were investigated in the unripe and ripe fruits and the leaves of the four Rubus plants (Rubus coreanus, R. crataegifolius, R. phoenicolasius, R. pungens var. oldhami) to develop the biomaterial 19${\alpha}$-HUT mixture as functional foods. Thin layer chromatogaphy-Densitometer (TLC-DM) was used to analyze the individual quantity of 19${\alpha}$-HUTs using standard compounds (euscaphic acid, tormentic acid, 23-hydroxytormentic acid, kaji-ichigoside F$_1$, rosamultin, niga-ichigoside F$_1$). The content of methanolic extract of the fruits were higher in the ripe stage than in the unripe stage whereas the content of 19${\alpha}$-HUT mixture varied with each Rubus species. The Rubus plants containing the highest amount of 19${\alpha}$-HUTs in the leaves were R. coreanus, R. phoenicolasius and R. pungens var. oldhami while only R. cratagefolius showed the highest content in the ripe fruits. The mean of total genin content of 19${\alpha}$-HUTs was 0.94 mg/g; that of the glycosides was 0.60 mg/g. The genin quantity was found in the order of 23-hydroxytormentic acid> euscaphic acid> tormentic acid; the glycoside was observed in the order of niga-ichig-oside F$_1$> kaji-ichigoside F$_1$> rosmaultin, by which the biosynthetic pathway of 23-hydroxytormentic acid and its glucoside niga-ichigoside F$_1$ via the intermediates tormentic acid and/or rosamultin was presumed. It is also suggested that the ripe fruits of R. crataegifolius will be desirable to use as functional foods rather than unripe fruits.

• Korean Journal of Food Science and Technology
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• v.24 no.6
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• pp.581-585
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• 1992

To isolate zearalenone-producing strains from agricultural products in Youngnam districts, various samples such as rice(60), barley(52), soybean(45), peanut(33), corn(32), maeju(27), unhulled rice(UR, 40), unhulled barley(UB, 54), and soil(32) collected. From 375 samples, 302 Fusarium strains were isolated. The isolated strains were cultured for 14 days at $30^{\circ}C$ in rice medium, and then screened zearalenone-producing strains by TLC and HPLC. The result was that 29 isolates[rice(3), maeju(2), corn(1), barley(5), soil(4), peanut(3), soybean(4), U.B.(5), U.R.(2)] were screened as zearalenone-producing strains by TLC, while 19 isolates [rice(2), maeju(1), corn(1), barley(4), soil(3), soybean(2), U.B.(3), U.R.(3)] by HPLC method.

• Korean Journal of Food Science and Technology
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• v.4 no.4
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• pp.309-316
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• 1972

Sweet potato lipids were isolated into free and bound lipid fractions and subjected to fractionation and quantitation by thin layer chromatography, followed by flavor evaluation. The results are summarized as follows: 1) Sweet potato flour contained 1.75% total lipids on a dry weight basis, of which free and bound forms were 0.95% and 0.80%, respectively. 2) TLC indicated the presence of 13 components in free lipids and 9 components in bound lipids, of which phospholipids accounted for 34.5% and free fatty acids, 17.2%, as the major components. 3) Free fatty acids were separated and quantitatively determined by reversed TLC to give 30.1% palmitic acid, 16.7% linoleic acid, 15.8% oleic acid and 9.8% linolenic acid as the main components. 4) The flavor of various lipid fractions were evaluated and the disagreeable taste and odor of sweet potato flour was mainly found in the bound lipid fraction.

• The Journal of Korean Medicine
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• v.23 no.1
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• pp.61-66
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• 2002

목적： 본 연구는 감미의 작용에 관한 "감보" 등의 이론적 바탕과 약물의 이화학적인 특성을 통해 약효를 어느 정도 예측하고자 하였다. 방법： 한약재의 오미별 이화학적 특성을 구명하기 위하여 수소이온농도(pH), $200^{\circ}C$와 $550^{\circ}C$에서의 질량감소량, 전기전도도, 가시부 및 자외부 흡수 spectrum의 전자전이에 따른 비율, TLC에 의한 주요 성분의 이동율($R_{f}{\;}value$)과 낮은 성분의 이동율($R_{f}{\;}value$)을 측정하였다. 결과： 전탕에 따른 수소이온농도(pH)의 평균은 $5.24{\pm}0.56$이었으며. 약재의 휘발 성분 및 수분 함유량은 $288{\pm}125mg$이었고, 유기물함량의 평균은 $867{\pm}116g$이었으며, 전기전도도의 평균은 $5.46{\pm}0.93S/cm$이었으며, 가시부 및 자외부 흡수 spectrum의 전자전이에 따른 흡광도 비율($\pi{\\rightarrow}\pi^{*}/n{\rightarrow}\pi^{*}$)의 평균은 $3.043{\pm}0.679$이었으며, TLC에 의한 주요 성분의 이동율($R_{f}{\;}value$)의 평균은 $0.553{\pm}0.317$이었고, TLC에 의한 낮은 성분의 이동율($R_{f}{\;}value$)의 평균은 $0.136{\pm}0.122$ 이었다. 결론：약재의 pH는 모두 7보다 낮은 약산성 이었으며, 약재의 휘발 성분 및 수분 함유량은 대략 10~50%정도를 나타내었다. 유기물함량은 대략 80~95%정도를 나타내었다. 전기전도도를 통하여 산약이나 감초는 이온성 물질을 많이 포함하고 있으리라 추정된다.

• Journal of the Korean Society of Food Science and Nutrition
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• v.31 no.2
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• pp.338-342
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• 2002

Antimicrobial activity of yellow pigment produced by Monascus anka Y7 (Y7) was studied. The crude yellow pigment of Y7 showed antimicrobial activity against some bacteria and yeasts. The diameter of inhibition zone against gram-positive bacteria was a little smaller t]fan that of gram-negative bacteria to the crude yellow pigment. Especially, E2 fraction obtained from the crude yellow pigment by TLC method showed high anti-microbial activity against E. coli.. The fraction had bright yellow pigment, showing fluorescent light and having the maximum absorption at 373 nm. Citrinin, a mycotoxin which had been characterized as an antimicrobial substance from a Monascus strain, was not detected in the E2 fraction and in the crude yellow pigment by the results of TLC and HPLC. This indicates that the antimicrobial activity of Y7 pigments did not any relationship with citrinin. Yellow degree (b/a of Hunters color value) of Y7 pigment was much higher than that of other natural colorants such as annatto, gardenia yellow and carthamus yellow. But the colors of all of the yellow pigments were similar by panels. Thus, the yellow pigment of Y7 could be used as a useful alternative colorant for food industry, having the advantage of antimicrobial activity.