• 한국수산과학회지
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• 제45권2호
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• pp.122-131
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• 2012

This study was performed to examine the effects of Curcuma aromatica (CA) and orange rind on the quality and sensory score of flying fish $Cypselurus$ $agoo$ $agoo$ roe treated with electrolyzed water during frozen storage ($-18^{\circ}C$). The pH was decreased with increasing amounts of CA extract added to flying fish roe and during frozen storage. The flying fish roe treated with CA extract showed increased yellowness, as compared to flying fish roe with no CA extract added and untreated with electrolyzed water (untreated). The flying fish roe containing CA extract maintained greater hardness than did untreated flying fish roe. The volatile basic nitrogen and trimethylamine contents of treated flying fish roe were lower than those of untreated flying fish roe during frozen storage. The results of volatile organic compound tests showed that the contents of alcohol, acid and ketone compounds in flying fish roe treated with CA extract and orange rind were relatively decreased, but the limonene content of treated flying fish roe was increased compared to that of untreated flying fish roe. In sensory evaluation, flying fish roe containing 0.05 and 0.1% of CA were preferred over others. In conclusion, CA and orange rind increased the quality and sensory scores of flying fish roe treated with electrolyzed water.

• 한국세라믹학회지
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• 제24권1호
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• pp.77-85
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• 1987

Hardened cement paste is mainly affected by corrosion of sulphate and chlorine ions in sea water. In this investigation, many specimens were made with the cement clinker minerals such as C3S, C3A, C4AF and their mixture according to cement composition added various blending materials. After the specimens were immersed in 4% MgSO4 and MgCl2 solutions, the product of reaction, the microstructure of specimen and Ca+2 ion leached in the solution were studied. The formation of Ca(OH)2 in the specimen of C3S is reduced relatively by adding pozzolanic admixtures. The chlorine ion is easily diffuse into the C3S specimen and produced CaCl2 compound, and it makes the specimen porous by leaching out itself into the solution. The specimen of C3A, C4AF are broken down by expanding reaction of ettringite and gypsum compound produced in the MgSO4 solution. At a later period, the ettringite is transformed into gypsum and 5MgO.2Al2O3·15H2O. The C3A in the MgCl2 solution combines chlorine ion to form Friedel's salt and prevents the diffusion reaction of chlorine ion into the specimen. Granulated slag shows inferior effect on the resistance of the specimen in MgSO4 solution by forming ettringite and gypsum, but good result in MgCl2 solution. Pozzolanic materials, on the whole, offer noticable effect on the resistance of the specimen in both solutions.

• 한국산림과학회지
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• 제87권3호
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• pp.341-346
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• 1998

산성화원 산림토양에 Ca, Ca+Mg, Ca+Mg+C.F. 등의 시비가 토양의 화학적 성질변화에 어떠한 영향을 미치는지를 알아보기 위해 도시지역인 남산과 수락산, 산림지역인 광릉의 참나무류 임분과 리기다소나무 임분을 대상으로 1991년 11월부터 1995년 4월까지 매년 시비한 후 시비 5년차인 1995년 11월에 토양의 화학적 성질을 조사하였다. 시비는 산림토양의 화학적 성질에 변화를 초래하였다. 토양 pH는 비료의 종류에 관계없이 상승하였으나 지역이나 임분에 따라 다른 경향을 보였다. 유기물, 전질소함량 등은 비료 종류간에 뚜렷한 차이가 나타나지 않았으나, 칼슘, 마그네슘, 염기총량은 시비 후 증가하였다. 치환성 양이온 함량은 리기다소나무 임분이 참나무류 임분에 비해 낮은 값을 보이고 있으며, 또한 도시지역이 산림지역에 비해 낮게 나타나 도시지역 산림에서 이들 양분의 용탈이 더 심한 것으로 나타났다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1991년도 추계학술대회 논문집 학회본부
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• pp.269-273
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• 1991

High Tc oxide superconductor with a Tc above 100 K has been successfully prepared by solid state reaction method in added-Pb BiSrCaCuO system. As compared with 123 compound, the formation reaction of the high Tc requires long time heat treatment. It is due to the transformation from the low Tc phase to high Tc phase. The sintering just below the melting point of the calcined powder mixture is effective on the formation of the high Tc phase in BiSrCaCuO system to be added with Pb. The growth of the high Tc superconducting phase has a thin plate shape, which is characterized by the c parameter of 37${\AA}$. The formation kinetics is also investigated in the samples with different Bi/Pb ratio and the 30% Pb addition is most preferable for the formation of the high Tc phase. The formation of the high Tc phases is delayed by the excessive addition of Pb. The lattice parameter(c) of the unit cell(both the low and high Tc phases) is increased with increase of Pb.

• 한국결정성장학회지
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• 제11권4호
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• pp.148-153
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• 2001

새로운 압전체인 $Ca_{3}NbGa_{3}Si_{2}O_{14}$(CNGS) 단결정은 Czochralski 법을 사용하여 결정성장을 이루었다. CNGS의 결정 구조는 $A_{3}BC_{3}D_{2}O_{14}$와 동방구조를 이루고 있음이 조사되어졌고, 단위 셀의 격자상수는 각각 a = 8.0873과 c = 4.979이었으며, 공간군은 P321이었다. 각각의 양이온의 분포는 각 자리에 규칙배멸을 이루고 있음을 보였다. CNGS 결정은 Langasite 보다 높은 품질계수, 전기기계결합계수, 압전성수를 나타내었으며, 이는 Langasite와 비교하여 낮은 탄성손실과 우수한 압전특성을 가짐을 보여주고 있다.

• Mass Spectrometry Letters
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• 제11권4호
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• pp.82-89
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• 2020

A systematic isolation and characterization study for Cassia auriculata (CA) seeds resulted in identifying antidiabetic compounds 1,3,8-trihydroxyanthraquinone and quercetin, quercetin-3-O-rutinoside, gallic acid, caffeic acid, ferulic acid, and ellagic acid. The ultra-high-performance liquid chromatography based triple quadrupole mass spectrometry methodology was developed and validated for simultaneous identification and confirmation of these compounds from CA seeds. Multiple reaction monitoring (MRM) based quantification method was developed with MRM optimizer software for MS1 and MS2 mass analysis. The method was optimized on precursor ions and product ions with the ion ratio of each compound. The calibration curves of seven bioactive analytes showed excellent linearity (r2 ≥ 0.99). The quantitation results found precise (RSD, < 10 %) with good recoveries (84.58 to 101.42%). The matrix effect and extraction recoveries were found within the range (91.66 to 102.11%) for the CA seeds. This is the first MS/MS-based methodology applied to quantifying seven antidiabetic compounds in CA seeds and its extract for quality control purposes.

• 디지털융복합연구
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• 제15권11호
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• pp.285-295
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• 2017

본 연구에서는 증폭시킨 홍삼으로부터 분리한 ginsenoside Rh2(Rh2)와 compound K(CK)의 융복합적 항염증 및 항암효과를 연구하여 홍삼 내 유용한 기능성분에 대한 기초 자료를 제공하고자 한다. 이에 Hep3B에서의 세포독성과 IL-6 유도 STAT3 루시퍼라아제 활성, B16F10과 Hacat 세포의 생존 농도를 측정하였고 Apoptosis와 관련된 분자의 발현양상을 확인하기 위해 FAC (fluorescence activated cell sorting) 분석을 수행하였다. 실험결과 Rh2, CK mixture가 10 ug/ml일 때 Hep3B 세포에서 세포독성이 없고 IL-6 감소율이 102%로 항염증 효과가 있는 것으로 나타났다. 또한 Rh2, CK mixture 50 uM에서 melanoma 세포인 B16F10과 human keratinocyte인 Hacat에서 독성을 보여 사멸하는 것을 관찰하였다. FACS 분석 결과 annexin V가 발현되지 않고 흑색종 세포와 keratinocyte가 탈착되면서 사멸되는 것을 확인하였다. 이러한 현상을 통하여 사멸되는 메카니즘이 anoikis 방식의 세포사멸로 인한 것으로 추정할 수 있으며 그것에 대한 명확한 세포사 신호 체계 규명을 위하여 향후 세포부착 단백질의 변화에 대한 연구가 필요할 것으로 판단된다.

• The Korean Journal of Physiology and Pharmacology
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• 제8권1호
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• pp.57-63
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• 2004

Fluoxetine, a widely used anti-depressant compound, has several additional effects, including blockade of voltage-gated ion channels. We examined whether fluoxetine affects ATP-induced calcium signaling in PC12 cells by using fura-2-based digital calcium imaging and assay for $[^3H]-inositol$ phosphates (IPs). Treatment with ATP $(100\;{\mu}M)$ for 2 min induced $[Ca^{2+}]_i$ increases. The ATP-induced $[Ca^{2+}]_i$ increases were significantly decreased by removal of extracellular $Ca^{2+}$ and treatment with the inhibitor of endoplasmic reticulum $Ca^{2+}$ ATPase thapsigargin $(1\;{\mu}M)$. Treatment with fluoxetine for 5 min blocked the ATP-induced $[Ca^{2+}]_i$ increase concentration-dependently. Treatment with fluoxetine $(30\;{\mu}M)$ for 5 min blocked the ATP-induced $[Ca^{2+}]_i$ increase following removal of extracellular $Ca^{2+}$ and depletion of intracellular $Ca^{2+}$ stores. While treatment with the L-type $Ca^{2+}$ channel antagonist nimodipine for 10 min inhibited the ATP-induced $[Ca^{2+}]_i$ increases significantly, treatment with fluoxetine alone blocked the ATP-induced responses. Treatment with fluoxetine also inhibited the 50 mM $K^+-induced$ $[Ca^{2+}]_i$ increases completely. However, treatment with fluoxetine did not inhibit the ATP-induced $[^3H]-IPs$ formation. Collectively, we conclude that fluoxetine inhibits ATP-indueed $[Ca^{2+}]_i$ increases in PC12 cells by inhibiting both an influx of extracellular $Ca^{2+}$ and a release of $Ca^{2+}$ from intracellular stores without affecting IPs formation.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2002년도 추계학술대회 논문집 Vol.15
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• pp.432-435
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• 2002

The ultimate study of this research is to improve the properties of digital X-ray receptor based on amorphous selenium. There are being two prominent studying for Digital Radiography. Direct and Indirect method of Digital Radiography are announced for producing high quality digital image. But each two systems have strength and weakness. This is a basic research for developing of Hybrid digital radiography which is a new type X-ray detector. ln this study, we investigated the electrical characteristic of multi-layer$(CaWO_4+a-Se)$ as a photoconductor according to the changing iodine composition ratio. The iodine composition ratio of a-Se compound is classified into 5 different kinds which have 30ppm, 100ppm, 300ppm, 500ppm, 700ppm and were made test sample throught thermo-evaporation. The phosphor layer of $CaWO_4$ was overlapped on a-Se using EFIRON optical adhesives. We measured the dark and photo current about the test sample and compared the electrical characteristic of the net charge and signal-to-noise ratio. Among other things, test sample of compound material of 700ppm iodine showed good characteristic of $2.53nA/cm^2$ dark current and $479nC/cm^2{\cdot}mR$ net charge at $3V/{\mu}m$.

• 생약학회지
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• 제16권4호
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• pp.206-209
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• 1985

White needle crystalline compound, mp.\;78{\sim}79$, was isolated from the petroleum ether fraction of the aerial parts of Chenopodium acuminatum. This compound was supposed to be cycloalkane by chemical properties, spectral data and elemental analysis. After extraction with petroleum ether, the methanolic extract of this plant found to contain aspartic acid, threonine, serine, glutamic acid, glycine, cystine, valine, isoleucine, tyrosine, and phenylalanine. Inorganic elements contained in this plant are as following: Mg 4.84%, Ca 9.602%, Zn 1.11%, K 29.104%, Mn 5.124%, Fe 27.039%, Co 0.31%, Pb 0.995%, Na 0.039% and Cu, 0.0076%.