• 한국세라믹학회지
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• 제24권2호
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• pp.155-160
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• 1987

본 연구는 제2보에서 합성한 $ZrSiO_4-Cd(SxSe_{1-x})$ 채료의 실용성을 조사하기 위하여 행하였다. 기존의 유명회사 제품의 채료와 본 합성채료를 비교 검사하였다. 우선 각각의 채료에 Frit를 적당한 비로 혼합하고 일정조성의 Tile에 시유하여 각각다른 온도(850-120$0^{\circ}C$)에서 소성한 다음 colorimeter를 사용하여 XYZ 주파장에 따른 색도도를 측정하였다. 또한 Munsell 계의 ISCC-NBS 색명법을 적용하여 색을 정량화 시킴으로서 채료의 적응성을 연구하였다. 그 결과 $ZrSiO_4-Cd(SxSe_{1-x})$ 채료는 V나 P 계통의 여타 채료와 같이 Frit 대 Stain의 비가 9:1의 최소비로 사용이 가능하며 100$0^{\circ}C$의 높은 온도에서도 밝은 적색으로 재현 될 뿐만 아니라 내산성이 강하고 고온에서 적응성이 있음을 확인하였다.

• 한국전기전자재료학회논문지
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• 제25권4호
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• pp.298-303
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• 2012

$Y_{1-x}VO_4:Eu_x^{3+}$ red phosphors were synthesized with changing the mol ratios of $Eu^{3+}$ ions by using the solid-state reaction method. The crystalline structure of phosphors was found to be a tetragonal system with the maximum diffraction intensity at $25.02^{\circ}$. The grain particles showed the truncated hexagonal patterns with a very homogeneous size distribution at 0.05 mol of $Eu^{3+}$ ion. The excitation spectra of the phosphor ceramics were composed of a broad band centered at 303 nm and weak narrow multilines peaked in the range of 360-420 nm. The dominant emission spectrum was the strong red emission centered at 619 nm due to the $^5D_0{\rightarrow}^7F_2$ electric dipole transition. The experimental results suggest that the optimum doping mol ratio of $Eu^{3+}$ ions for preparing the red phosphors is 0.10 mol with the asymmetry ratio of 5.21.

• 한국육종학회지
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• 제41권1호
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• pp.1-8
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• 2009

This study was carried out to breed and develop high quality and functional nutrient tomato with multi disease resistance as well as a stable growing adaptation for fresh market usage under protected plastic houses cultivation. The materials were used 5 inbred lines and their 6 hybrids of large tomato group, which have been bred and developed from 1999 to 2007 in Division of Plant Resource Department of Chungnam National University. Fruit weight showed hybrid vigor effect that $F_1$ hybrids weighed more than their parent lines, fruit shape formed three type of oblate, deep oblate and globe shape, in firmness and pericarp thickness have got a high significant correlation, inbred DN611 line was measured the most firm fruit with 6.04 mm pericarp thickness. In fruit color at maturity, pink color crossed to red color appeared all red fruit color in the $F_1$ hybrids, it means red skin color is a dominant gene compared to pink skin color is a recessive gene in tomato, while between fruit skin color and shoulder part color showed no any co-relationship. The sugar content and titratable acid of $F_1$ hybrids inherited an intermediate data of their parent lines, the flavor of KP543 inbred line and the hybrid (JB535 x KP543) revealed the better taste with high brix and proper titratable acid content$^{*}$. In beta carotene content DN611 line showed 2~3 times higher than other materials so that its 3 hybrids contained an increased level of beta carotene, lycopene content was not so much difference among inbred lines and $F_1$ hybrids, of them MD508 contained higher of 8.72 mg and hybrid (JB535 x JA517) had 8.05 mg lycopene content per 100 g fruit, overall pink skin color and red skin color measured a higher lycopene content than yellow and orange skin color at ripe stage. In disease resistance test by PCR marker for Fusarium race2 (I2), Nematode (Mi1), ToMV ($Tm2^2$), Cladosporium (Cf9), (JB535 x JA517) hybrid have got multi-resistance with homozygote band in Nematode, ToMV, Cladosporium and heterozygote band in Fusarium race2. Through this breeding program we could select high quality and functional nutrient with multi resistant $F_1$ hybrids and inbred lines in tomato which are two best hybrids (JB535 x MD508), (JB535 x JA517), additionally developed high beta carotene inbred line DN611 and increased the level of lycopene inbred line MD508. These results will be very useful to make a high quality tomato variety continuously.

• Preventive Nutrition and Food Science
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• 제9권1호
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• pp.34-38
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• 2004

High-pungency red pepper and capsaicin modulate circulating hormone levels and induce lipolysis in adipose tissue in vivo. This study was designed to investigate the lipolytic activity of adipocytes by high-pungency red pepper extract in vitro. High-pungency red pepper (var. Chungyang) powder showed 126.1 mg% of capsaicinoid which was 3 x higher than low-pungency red pepper powder (var. Daemyung). To study the effects of high-pungency red pepper extract on lipolytic activity, preadipocytes were separated from the epidermal fat of 14 day-old rats, induced to differentiate into adipocytes and were treated with red pepper extracts. The amount of glycerol released from adipocytes into the culture medium was analysed to measure lipolytic activity. Glycerol release from adipocytes was increased in a dose-dependent manner with high-pungency red pepper extract treatment. However, there was no significant change in the glycerol release when adipocytes were treated with low-pungency red pepper extract. To investigate whether lipolysis by high-pungency red pepper extract is caused by capsaicin, glycerol release was detected after the treatment of adipocytes with capsaicin. Glycerol release was significantly increased by capsaicin. These results suggest that high-pungency red pepper extract might have a direct lipolytic activity in adipocytes that is mediated by capsaicin.

• 새물리
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• 제68권12호
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• pp.1308-1314
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• 2018

본 연구에서는 고상반응법을 이용하여 $(Y_{0.85-x}Yb_{0.15})_3Ga_5O_{12}:Er^{3+}_x$ 형광체 분말을 합성하고 그 분말의 형광특성을 연구하였다. $Yb^{3+}$ 이온의 농도를 0.15 mol에 고정하고 $Er^{3+}$ 이온의 농도를 변화시키며 제작된 $(Y_{0.85-x}Yb_{0.15})_3Ga_5O_{12}:Er^{3+}_x$ 형광체의 결정성을 X-선 회절장치를 이용하여 형광체 분말의 결정성을 측정하였다. $(Y_{0.85-x}Yb_{0.15})_3Ga_5O_{12}:Er^{3+}_x$ 분말은 $Er^{3+}$ 이온의 함유량에 관계없이 입방정계 구조의 다결정 상으로 성장하였음을 확인할 수 있었다. 형광광도계를 이용하여 형광체의 형광특성을 관찰하였으며, 980 nm 레이저 다이오드와 분광기를 이용하여 형광체의 상방전환 형광특성을 분석하였다. 980 nm 레이저 다이오드로 여기시킨 $(Y_{0.85-x}Yb_{0.15})_3Ga_5O_{12}:Er^{3+}_x$ 형광체의 상방전환 발광스펙트럼은 553 nm 부근의 강한 녹색 형광과 660 nm에서의 약한 적색 형광을 나타내었다. 형광과 상방전환에 의한 형광의 세기는 $Er^{3+}$ 이온의 첨가량이 0.12 mol 일 때 가장 높게 나타났으며, 에너지 전달 과정을 이용해 상방전환에 의한 형광 특성을 분석하였다.

• 약학회지
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• 제33권1호
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• pp.15-19
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• 1989

The effects of Gypsophila saponin, sodium dodecylsulfate (SDS) and Triton X-100 on volume changes and fragility of red blood cells were compared to ginseng saponin to elucidate whether there are any difference in their action on membrane lipid. Cell volume was decreased to about 38% in 1M NaCl and increased to about 20% in 1/10M NaCl. Hematocrit value was decreased by Gypsophila saponin, SDS, and Triton X-100 which caused hemolysis in isotonic NaCl solution. These detergents also inhibited increase of cell volume and accelerated hemolysis in hypotonic solution. However, ginseng saponin did not influence to osmotic volume changes and hemolysis of red blood cells. These results suggest that the disruptive effect of plant saponin on membrane barriers induced by removing membrane lipid is different from their source and ginseng saponin has very low affinity to membrane lipid.

• 한국응용과학기술학회지
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• 제26권3호
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• pp.357-361
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• 2009

The authors have demonstrated white oraganic light-emitting diodes (WOLED) using 1,4-bis[2-(4'-diphenylaminobiphenyl-4-yl)vinyl]benzene as fluorescent blue emitter and iridium(III) bis(5-acetyl-2-phenylpyridinato-N,C2') acetylacetonate as phosphorescent red emitter. The optimized WOLED using red host material as bis(2-methyl-8-quinolinato) -4-phenylphenolate exhibited proper color stability in comparison with the control device using 4,4'-N,N'-dicarbazole-biphenyl as red host. The white device showed a maximum luminance of 21100 $cd/m^2$ at 14 V, luminous efficiency of 9.7 cd/A at 20 $mA/cm^2$, and Commission Internationale de I'Eclairage ($CIE_{x,y}$)coordinates of (0.32, 0.34) at 1000 $cd/m^2$. The devices also exhibited the color shift with ${\Delta}CIE_{x,y}$ coordinates of ${\pm}$ (0.01,0.01) from 100 to 20000 $cd/m^2$.

• 한국문화재보존과학회:학술대회논문집
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• 한국문화재보존과학회 2002년도 제15회 발표논문집
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• pp.12-20
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• 2002

경복궁 근정전 내${\cdot}$외부의 단청 안료를 X선형광분석기와 X선회절분석기로 성분 분석한 결과, 내부에 쓰인 안료들은 현대에 많이 쓰이고 있는 인공합성된 안료들이 아닌 천연광물에서 추출한 안료들을 사용한 것임을 알 수 있었다. 즉, 녹색안료는 청동의 녹색부식물과 뇌록석을 그리고 적색의 경우는 진사를 사용했다. 외부의 경우는 인공합성된 안료들을 사용한 것임을 알 수 있었다. 즉, 황색안료는 황연, 적색안료의 경우는 연단과 석간주를 사용하였으며, 녹색 안료는 화록청과 산화크롬녹을 사용하였다. 또한 청색 안료로는 군청을 그리고 백색 안료로는 산화티탄을 사용했다.

• 한국재료학회지
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• 제18권3호
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• pp.159-162
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• 2008

$Eu^{3+}$-activated $R_3GaO_6$ (R = Y, Gd) phosphors were prepared in a conventional solid-state reaction and their optical properties were investigated. These compounds exhibit strong red emission under light excitation at 254 nm. The emission spectra are dominated by peaks appearing around 610-630 nm that are induced by the electric dipole transition of $^5D_0\;{\rightarrow}\;^7F_2$ of $Eu^{3+}$. In addition, the appropriate CIE (Commission Internationale de l'clairage) chromaticity coordinates, (x = 0.656, y = 0.336) for $Y_3GaO_6$ and (x = 0.655, y = 0.334) for $Gd_3GaO_6$, become closer to the NTSC (National Television System Committee) standard values. With the optimized activator concentrations, the maximum emission brightness is approximately 80% of $Y_2O_3$:$Eu^{3+}$ typical red-emitting phosphor with improved color purity under an excitation condition of 254 nm.

• 한국식품과학회지
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• 제45권4호
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• pp.441-450
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• 2013

본 연구는 어린잎 적양무가루를 첨가한 과자류 개발을 위해 회전중심합성계획법에 따라 어린잎 적양무가루, 버터, 설탕의 양을 독립변수로 하여 우리밀 쿠키를 제조하여, 품질 특성을 조사하고, 반응표면분석법을 이용하여 최적배합비를 구하였다. 이화학적 특성과 물성 중 L값(명도)는 quadratic 모델이 채택되었고, a값(적색도), b값(황색도), 퍼짐성, 경도는 linear 모델이 채택되었다. 관능적 특성인 색, 외관, 조직감, 향, 맛, 전체적 기호도는 quadratic 모델이 채택되었다. 관능특성 검사 결과 외관은 어린잎 적양무가루 첨가량의 증가에 따라 감소하고, 조직감은 버터 첨가량의 증가에 따라 증가하였다. 향, 맛, 전체적 기호도는 설탕 첨가량이 증가함에 따라 중심점(40 g) 부근까지는 급격히 증가하다가 그 이후부터는 약간씩 증가하였다. 그 외 다른 관능검사 항목에서는 어린잎 적양무가루, 버터, 설탕 첨가량에 의해 증가하다가 감소하는 경향을 볼 수 있었다. 관능적 기호도 중 맛은 버터 첨가량이 어린잎 적양무가루나 설탕 첨가량 보다 영향이 컸으며, 그 외, 색, 외관, 조직감, 향과 전체적 기호도는 어린잎 적양무가루의 영향이 버터나, 설탕에 대한 영향보다 컸다. 관능특성 검사 결과 중 유의성이 있었던 모든 항목의 최대값을 목표범위를 충족시키는 최적의 배합량은 어린잎 적양무가루 5.15 g, 버터 64.84 g, 설탕 47.18 g으로 산출되었다.