• 한국응용곤충학회지
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• 제42권1호
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• pp.1-7
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• 2003

고구마를 가해하는 됫날개흰밤나방(Aedia leucomelas)의 형태적 특징과 온도에 따른 발육특성 그리고 발생소장 및 고구마 가해양상을 1999부터 2000년까지 실내와 고구마포장에서 조사하였다. 성충은 흑갈색으로 체장은 암컷이 20.2mm,수컷이 18.9mm이었고, 날개 편 길이는 각각 33.7mm, 29.4mm이었다. 난은 납작한 원형이며, 유충은 엷은 황녹색-짙은 회색으로 체장은 3.3-53.5 mm이고, 번데기는 진한 갈색으로 체장은 15.1 mm이었다. 난부터 우화까지의 평균발육기 간은 15, 20, 25, 3$0^{\circ}C$ (60$\pm$5% RH, 16L : 8D)에서 각각 108.5, 70:7, 40.2, 29.1일로 온도가 증가할수록 발육기간이 짧아졌다. 각 태별 발육영점온도와 유효적산온도는 난은 10.7$^{\circ}$C와 67.5일도, 유충은 11.0$^{\circ}$C와 275.1일도, 번데기는 9.3$^{\circ}$C와 244.6일도 이었다. 암컷의 수명은 위 조사온도에서 각각 14.6, 12.8, 11.1, 10.3일이었고, 산란수는 각각 43, 189,244,265개로 성충수명은 고온일수록 짧아졌지만 산란수는 증가하였다. 됫날개흰밤나방 유충은 고구마 포장에서 6월 중순부터 10월까지 발생되었는데 9월 상-중순에 발생량이 가장 많았다. 유충의 섭식량은 20-$25^{\circ}C$에서 가장 많았고, 25$^{\circ}$C에서 1령, 2령, 3령, 4령, 5령 유충의 1일 섭식량은 각각 0.4, 3.6, 19.6, 40.7, 78.9$\textrm{cm}^2$ 였다.

• Journal of Microbiology and Biotechnology
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• 제25권3호
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• pp.418-422
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• 2015

In the course of screening for novel cell cycle inhibitors and apoptotic inducers, CR389, elucidated as 5-(1H-benzoimidazol-2-yl)-1H-pyridin-2-one, was generated as a new hit compound. Flow cytometric analysis and western blots of PA-1 cells treated with $60{\mu}M$ CR389 revealed an appreciable cell cycle arrest at the G2/M phase through direct inhibition of the CDK1 complex. In addition, activation of p53 via phosphorylation at Ser15 and subsequent up-regulation of p21^CIP1 showed that CR389 also induces p53-dependent-p21^CIP1-mediated cell cycle arrest. Furthermore, apoptotic induction in $60{\mu}M$ CR389-treated PA-1 cells is associated with the release of cytochrome c from mitochondria through up-regulation of the proapoptotic Bax protein, which results in the activation of procaspase-9 and -3, and the cleavage of poly(ADP-ribose) polymerase (PARP). Accordingly, CR389 seems to have multiple mechanisms of antiproliferative activity through p53-mediated pathways against human ovarian cancer cells. Therefore, we conclude that CR389 is a candidate therapeutic agent for the treatment of human ovarian cancer via the activation of p53.

• 동아시아식생활학회지
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• 제21권4호
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• pp.526-534
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• 2011

본 연구는 증절간 고구마 제조를 위하여 냉풍 건조 방법을 이용하여 건조 조건별 증절간 건조 고구마의 건조 특성, 물성 및 관능적 특성을 연구하였다. 건조 시 수분함량은 $25^{\circ}C$ 48시간에서 4.53%로 가장 낮은 수치를 보였고, 색차에서 건조 온도가 낮을수록, 건조 시간이 짧을수록 L값이 높아졌으며 a, b, ${\Delta}$E값은 건조 온도가 높을수록 건조 시간이 길어짐에 따라 증가하는 경향을 보였다. 가용성 고형분은 건조 조건별로 17~60.33 $^{\circ}Brix$의 범위를 나타내었고, 환원당은 93.22~190.35 mg/g 범위를 나타내었으며, 물성 측정에서 경도는 $25^{\circ}C$ 48시간 25.13 kgf /$cm^2$ 가장 높은 수치를 나타내었으며, 탄성과 응집성은 88.60, 94.87%로 가장 높은 수치를 나타내었다. 관능 평가에서 밤고구마는 $20^{\circ}C$ 40시간에서 색, 향미, 맛, 조직감, 전반적인 기호도에서 가장 높은 평가치를 나타내었으며, 이때 수분함량 10~13% 내외로서 미생물의 증식을 억제할 수 있는 수분함량의 범위이며, 저장성의 향상도 기대할 수 있을 것으로 생각된다. 반응표면분석을 통한 증절간 고구마의 최적 건조 조건을 예측한 결과, 건조 온도 $19^{\circ}C$, 건조시간 39.5 hr으로 예측되었다.

• 한국환경성돌연변이발암원학회지
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• 제22권1호
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• pp.54-59
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• 2002

We have used cDNA microarray hybridization to identify gene regulated in response to gamma-irradiation in U-937 cell. The cDNA-chip was composed entirely of 1,000 human cancer related gene including apoptosis and angiogenesis etc. In gamma-irradiated U-937 cell, highly charged protein, ribosomal protein L32, four and a half LIM domains 3, lipocalin 2 (oncogene 24p3) and interleukin 15, ataxia telangiectasia mutated (includes complementation groups A, C and D) genes showed increased level of its transcription, and cell division cycle 25A, dihydrofolate reductase, topoisomerase (DNA) II beta(180kD), kinase suppressor of ras and strarigin genes showed reduced level of its transcription compared to untreated U-937 cell. The significant change of level of transcription was not found in well-known ionizing radiation(IR)-responsive gene, such as transcription factor TP53 and p53 related gene, except ataxia telangiectasia mutated gene.

• 설비공학논문집
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• 제25권3호
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• pp.143-149
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• 2013

In this work, nucleate pool boiling heat transfer coefficients (HTCs) of R134a and R1234yf are measured, on flat plain, 26 fpi low fin, Turbo-B, Turbo-C and Thermoexcel-E surfaces. All data are taken at the liquid pool temperature of $7^{\circ}C$, on a small square copper plate ($9.53mm{\times}9.53mm$), at heat fluxes from $10kW/m^2$ to $200kW/m^2$, with an interval of $10kW/m^2$. Test results show that nucleate boiling HTCs of all enhanced surfaces are greatly improved, as compared to that of a plain surface. Nucleate pool boiling HTCs of R1234yf are very similar to those of R134a, for the five surfaces tested.

• 한국전기전자재료학회논문지
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• 제25권1호
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• pp.53-57
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• 2012

In this paper, by designing 20 W class driving circuit for driving high-power LED (Light Emitting Diode), we are going to comparatively carry out the analysis of characteristics for power circuit according to each design method. In this case, 200 V 60 Hz was performed as input data. The electrical characteristics such as voltage, current and ripple are checked for constant current circuit and constant voltage circuit in the LED module. In addition, as the ripple has an influence on illumination of LED light, low temperature working (-20 [$^{\circ}C$]) and high temperature working(80 [$^{\circ}C$]) are measured to make sure the ripple characteristics in accordance with temperature. In low temperature operation -20 [$^{\circ}C$] measurements, both constant current circuit and constant-voltage circuit were less impacted on input fluctuation, whereas in the high temperature operation 80 [$^{\circ}C$], current voltage in constant voltage circuit was surge after 430 [hour]. Voltage current ripple of constant current circuit was much less than constant voltage circuit, therefore we can show that constant current circuit is more stable.

• 한국식품영양과학회지
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• 제26권6호
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• pp.1006-1012
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• 1997

To observe the food quality of Baik-kimchi which is known as a watery Chinese cabbage pickles without fish sauce and red pepper paste, the changes of dietary fibers and pectic substances during fermentation at 5$^{\circ}C$ and $25^{\circ}C$ were studied. Baik-kimchi fermented at $25^{\circ}C$ showed a greater changes in pH and acidity than those of 5$^{\circ}C$ during storage. Ripened Baik-kimchi products fermented at 5$^{\circ}C$ could be prepared on 9~12 days of fermentation, and those had a pH range from 4.25 to 4.40 and acidity of 0.34~0.53. But in the case of $25^{\circ}C$ fermentation, Baik-kimchi ripened for 3 days showed a pH of 4.02 and acidity of 0.54. The pH and acidity of the Baik-kimchi juice changed more rapidly than those of the Baik-kimchi solid regardless of fermentation temperatures. The content of soluble dietary fiber(SDF) was ranged from 3.06 to 4.87% at 5$^{\circ}C$ and a wide variation in SDF was observed in the sample fermented at $25^{\circ}C$(4.15~11.22%). Insoluble dietary fiber(IDF) were increased from 21.66% to 28.42% in solid of Baik-kimchi during fermentation at 5$^{\circ}C$ and ranged from 21.37% to 24.65% for sample fermented at $25^{\circ}C$. A notable amount of pectin had been dissolved in juice of Baik-kimchi till the best ripening time and showed the level of 223.2mg/100ml at 5$^{\circ}C$ on the day of 9 and 207.3mg/100ml at $25^{\circ}C$ on the day of 2. In contrast, the contents of pectin in solid Baik-kimchi decreased, whereas contents of sodium hexametaphosphate soluble pectin(HXSP) and HCl soluble pectin(HClSP) increased with fermentation period.

• 한국지역지리학회지
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• 제16권4호
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• pp.339-354
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• 2010

본 연구에서는 2009년 여름 강원도 양구군 해안분지(펀치볼)에 구축한 자동기상관측망 기온자료를 분석하여 여름철 하루 중 시간진행 또는 일기패턴에 따른 산간분지 내 기온감률 변화 특징을 밝히고자 한다. 산정부와 분지 내 사이에 형성되는 여름철 일평균 기온감률은 $-0.53^{\circ}C$/100m이나, 일변화에 의해 새벽 6시경에 $-0.25^{\circ}C$/100m의 최저, 오후 4~5시경에 $-0.85^{\circ}C$/100m의 최고값을 나타낸다. 종관일기 패턴 별 일평균 기온감률은 강수일($-0.63^{\circ}C$/100m), 집중호우일($-0.53^{\circ}C$/100m), 약간 구름 낀 날($-0.47^{\circ}C$/100m), 맑은날($-0.39^{\circ}C$/100m) 순으로 높게 나타난다. 여름철 맑은날 새벽에는 분지 내에서 기온역전현상으로 냉기호가 형성되는 반면, 호우일에는 구름에 의한 복사냉각효과 감소로 온기호가 형성된다.

• 한국산학기술학회논문지
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• 제13권11호
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• pp.5637-5645
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• 2012

폐기되는 홍어껍질을 기능성 식품원으로 재이용하고자 홍어껍질 물 추출물의 추출특성과 세 종류의 식용유에 대한 산화억제 효과를 측정하였으며, 추출 콜라겐의 겔화를 위한 최적조건 및 겔화제 선정, 겔의 저장성, 강도와 관능평가를 실시하였다. $50^{\circ}C$ 추출물의 방향족화합물 함량과 페놀성 화합물 함량은 $25^{\circ}C$ 추출물에 비하여 각각 49.4%와 32.7% 높았으며, $50^{\circ}C$ 추출물의 환원력은 $25^{\circ}C$ 추출물 보다 52.74% 높았으나 ascorbic acid의 14.9%, BHT의 27.8%였다. 추출물의 전자공여능은 방향족 화합물과 페놀성 화합물의 함량이 높을수록 높게 측정되었다. 식용유에 대한 $50^{\circ}C$ 추출물의 산화억제 효과는 옥수수 배아유, 대두유 및 올리브유 순이었으며, 식용유 종류에 따라 ascorbic acid의 38.27~96.83%, BHT의 49.53~75.31%였다. 홍어껍질 추출물로부터 콜라겐 겔화의 최적 추출조건은 2.5배의 가수비에서 $100^{\circ}C$, 2시간이었으며, 조미하지 않은 경우에 비해 10% 조미한 경우 겔의 강도를 50%이상 저하시킬 수 있었고, 5개항에 걸친 관능평가 결과 상당한 개선을 보여 식품으로서의 제품화가 가능한 것으로 평가되었다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2009년도 제40회 하계학술대회
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• pp.1252_1253
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• 2009

The composites were fabricated by adding 0, 15, 20, 25[vol.%] Zirconium Diboride(hereafter, $ZrB_2$) powders as a second phase to Silicon Carbide(hereafter, SiC) matrix. The physical, mechanical and electrical properties of electroconductive SiC ceramic composites by spark plasma sintering(hereafter, SPS) were examined. Reactions between $\beta$-SiC and $ZrB_2$ were not observed in the XRD analysis The relative density of mono SiC, SiC+15[vol.%]$ZrB_2$, SiC+20[vol.%]$ZrB_2$ and SiC+25[vol.%]$ZrB_2$ composites are 90.97[%], 74.62[%], 77.99[%] and 72.61[%] respectively. The XRD phase analysis of the electroconductive SiC ceramic composites reveals high of SiC and $ZrB_2$ and low of ZrO2 phase. The electrical resistivity of mono SiC, SiC+15[vol.%]$ZrB_2$, SiC+20[vol.%]$ZrB_2$ and SiC+25[vol.%]$ZrB_2$ composites are $4.57{\times}10^{-1}$, $2.13{\times}10^{-1}$, $1.53{\times}10^{-1}$ and $6.37{\times}10^{-2}[{\Omega}{\cdot}cm]$ at room temperature, respectively. The electrical resistivity of mono SiC, SiC+15[vol.%]$ZrB_2$, SiC+20[vol.%]$ZrB_2$ and SiC+25[vol.%]$ZrB_2$ are Negative Temperature Coefficient Resistance(hereafter, NTCR) in temperature ranges from 25[$^{\circ}C$] to 100[$^{\circ}C$]. It is convinced that SiC+20[vol.%]$ZrB_2$ composite by SPS can be applied for heater above 1000[$^{\circ}C$].