• Journal of Animal Science and Technology
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• 제46권6호
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• pp.909-916
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• 2004

CCAAT/enhancer binding protein(C/EBP)는 지방전구세포의 분화과정에서 말현하는 전사인자군에 속한다. 이러한 C/EBP 중에서 C/EBP $\alpha$ 는 지방세포의 분화와 지방침착에 있어 중요한 역할을 수행허는 것으로 알려져 있다. 본 연구에서는 한우 C/EBP$\alpha$ 유전자를 분리 동정하고 그 발현을 조사하였다. 한우 C/EBP$\alpha$ 유전자는 1059bp의 open reading frame으로 구성되어 있으며 353개의 아미노산을 암호화하고 있었다. 그리고 한우 C/EBP $\alpha$ 아미노산을 다른 종과 비교하였을 때 매우 높은 상동성을 나타내었다. Northern blotting 분석에 의하여 12개월 한우에 있어서 C/EBP$\alpha$ mRNA의 분석을 실시한 결과 지방조직에서 가장 높은 말현을 나타내었으며 대장과 폐에서 매우 낮은 말현을 확인할수 있었다. 또한 12개월26개월 30개월 한우 의 등심과 지방에 있어서 C/EBP$\alpha$ 유전자의 발현을 real-time RT-PCR로 분석한 결과 등심 에서는 26개월에 서 가장 높은 발현을 보였으며 지방에서는 12개월과 26개월에 서 높은 발현을 나타내었다.

• 대한전기학회논문지:전기물성ㆍ응용부문C
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• 제55권11호
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• pp.544-547
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• 2006

In this paper, we present a temperature-controlled system for MEMS electrical resistance heaters without a temperature sensor. To rapidly control the heater temperature, the microheater system developed consists of a power supply, power amplifier, digital ${\underline{P}}roportional-{\underline{I}}ntegral-{\underline{D}}ifferential$ (PID) controller, and a quarter bridge circuit with the microheater and three resistors are nominally balanced. The microheaters are calibrated inside a convection oven to obtain the temperature coefficient with a linear or quadratic fit. A voltage amplifier applies the supply voltage proportional to the control signal from the PID controller. Small changes in heater resistance generate a finite voltage across the quarter bridge circuit, which is fed back to the PID controller to compare with the set-point and to generate the control signal. Two MEMS microheaters are used for evaluating the developed control system - a NiCr serpentine microheater for a preconcentrator and a Nickel microheater for ${\underline{P}}olymerase\;{\underline{C}}hain\;{\underline{R}}eaction$ (PCR) chip.

• 마이크로전자및패키징학회지
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• 제6권4호
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• pp.35-39
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• 1999

The $Li_2O-MgO-MgF_2-SiO_2$glasses with addition of $B_2O_3$ were investigated in order to make glass-ceramics for low temperature firing substrate. Glasses were made by melting at $1450^{\circ}C$ in the electronic furnace and crystallized at $750^{\circ}C$. The crystal phases were polycrystalline of lithium boron fluorphlogopite and lithium fluorhectorite. The crystal shape was chanced to granule type from needle type with increasing $B_2O_3$ content. Average particle size of the glass-ceramics after water swelling was 3.77$\mu\textrm{m}$. The optimum sintering temperature and sintering shrinkage of the substrate were $900^{\circ}C$ and 13.4%, respectively.

• 펄프종이기술
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• 제38권5호
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• pp.66-73
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• 2006

The effects of active packaging on the surface stiffness, mass, volume, density and weight changes of fresh as well as stored eggplant were studied at 11 and $25^{\circ}C$ for 10 days with active packaging material Type 1 and 2 and control. Mass, volume, and surface stiffness of eggplant decreased linearly throughout the storage period regardless of storage conditions; while the mass density showed a reverse trend in the ease of $11^{\circ}C$ storage. Reduction rate of mass, mass density and weight was observed minimum at $25^{\circ}C$ storage temperature with active packaging Type 1. The weight of eggplant decreased at a higher rate in the initial 4 days compared to that in the later period of storage regardless of storage temperature and type of packaging.

• Journal of Welding and Joining
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• 제24권1호
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• pp.77-87
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• 2006

Considering ferrite grain size in the base metal, the prediction model for $A_{c3}$ temperature and prior austenite grain size at just above $A_{c3}$ temperature was proposed. In order to predict $A_{c3}$ temperature, the Avrami equation was modified with the variation of ferrite grain size, and its kinetic parameters were measured from non-isothermal data during continuous heating. From calculation using a proposed model, $A_{c3}$ temperatures increased with increasing ferrite grain size and heating rate. Meanwhile, by converting the phase transformation kinetic model that predicts the ferrite grain size from austenite grain size during cooling, a prediction model for prior austenite grain size at just above the $A_{c3}$ temperature during heating was developed.

• 한국의학물리학회:학술대회논문집
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• 한국의학물리학회 1999년도 Japanese Journal of Medical Physics
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• pp.372-375
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• 1999

We have developed a new heavy ion CT detector system for the use of a fan beam. The system consists of two sets of a position sensitive detector and an energy detector. The calibration runs were carried out using a $\^$12/C beam of 1mm in diameter with the energies of 290 MeV/u, 254.5 MeV/u, and 215.8 MeV/u. The spatial resolution of 1.1 mm and the energy resolution of about 1％ were achieved.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2006년도 추계학술대회 논문집
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• pp.129-130
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• 2006

• 한국재료학회:학술대회논문집
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• 한국재료학회 1998년도 IUMRS-ICEM ABSTRACT BOOK
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• pp.120.3-120
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• 1998

• 한국재료학회:학술대회논문집
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• 한국재료학회 1998년도 IUMRS-ICEM ABSTRACT BOOK
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• pp.112.4-112
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• 1998

• 한국작물학회:학술대회논문집
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• 한국작물학회 2017년도 9th Asian Crop Science Association conference
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• pp.324-324
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• 2017

Total 15 different corn hybrids, Kwangpyeongok, Gangdaok, Yanganok, Singwangok, Jangdaok, Cheonganok, Cheongdaok, Andaok, Dapyeongok, Pyeongkangok, Pyeonganok, Daanok, Sunwon P3394, Gangilok, P3394, had been used to investigate the plant growth and yield of corn hybrids depends on the sowing date. Sowing dates were April 5th, June 25th, and July 5th and all experiments had three repeats. The growth of Gangdaok was the best. However, in the case of Kwangpyeongok, the growth was not the best to compare with Gangdaok, but the stem to ear height ratio was lower than Gangdaok, it may be better for the stable cultivation. Both of the growth and yield of Daanok was not good regardless of planting date, but the yield and ear shape of Pyeongkangok and Dapyeongok were good for fresh corn. The growth and yield of 15 different corn hybrids were variable depends on the planting date, however, the growth degree days (GDD) was the most important factor for the maturity of the corn. More than $1500^{\circ}C$ of GDD was enough to harvest mature corn hybrids in the central region of Korea. Besides the yield and growth, other characters such as sweetness and taste as a food should be investigated further for the fresh corn to be suggested.