• 한국진공학회:학술대회논문집
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• 한국진공학회 2010년도 제39회 하계학술대회 초록집
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• pp.309-309
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• 2010

We have investigated the effect of $H_2$ plasma treatment on the BZO (ZnO:B, Boron doped ZnO) thin films. The BZO thin films are prepared by LP-MOCVD (Low Pressure Metal Organic Chemical Vapor Deposition) technique and the samples of BZO thin film are performed with $H_2$ plasma treatment by plasma treatment system with 13.56 MHz as RIE (Reactive Ion Etching) type. After exposing $H_2$ plasma treatment, measurement of transmittance, reflectance and haze spectra in 300~1100 nm, electrical properties as resistivity, mobility and carrier concentration and work function was analysed. Regarding the results of the $H_2$ plasma treatment on the BZO thin films are application to the TCO for solar cells, such as the a-Si thin films solar cell.

• 대한약학회:학술대회논문집
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• 대한약학회 2002년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.2
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• pp.366.1-366.1
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• 2002

Emerging medical technologies for effective and lasting repair of articular cartilage include delivery of cells or cell-seeded scaffolds to a defective site to initiate de novo tissue regeneration. In this respect. the availability of an appropriate biomaterial scaffold is crucial to allow chondrocyte growth and cartilaginous matrix deposition in a three-dimensional geometry. Hyaluronic acid (HA) molecules are anchored to the chondrocyte membrane via receptors, such as CD44. (omitted)

• 공업화학
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• 제29권6호
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• pp.696-702
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• 2018

최근 열전지는 우주 및 국방분야에서 활용하기 위하여 고출력 및 고에너지 밀도의 새로운 전극재료가 요구되는 실정이다. 본 논문에서는 성형성과 용량의 한계를 가지는 펠릿 타입의 리튬-실리콘 합금(Li(Si)) 음극을 대체하기 위하여 고밀도를 가지는 리튬음극을 제조하고, 단위전지 및 열전지의 전기화학적 성능에 미치는 영향을 고찰하였다. 리튬음극은 $500^{\circ}C$에서 안정적인 작동을 위하여 철 분말을 바인더로 사용하였고 리튬 중량별(17, 15, 13 wt%) 단위전지 성능평가를 통해 리튬 13 wt%에서 안정적인 성능을 확인하였다. 또한 리튬음극을 사용한 단위전지의 개회로전압이 2.06 V로 Li(Si) 음극 개회로전압 1.93 V에 비해 약 0.1 V 이상 높게 나타났고, first phase에서 리튬음극의 비용량은 $1,632As{\cdot}g^{-1}$로 Li(Si) 음극의 비용량 $1,181As{\cdot}g^{-1}$에 비해 약 1.4배 정도 성능이 향상됨을 확인하였다. 리튬음극을 적용한 열전지를 상온 및 고온 성능시험 결과를 통하여 Li(Si) 음극 열전지에 비해 전압 및 작동시간 등이 탁월하며, 출력특성 및 에너지밀도가 획기적으로 향상됨을 확인하였다.

• 한국작물학회지
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• 제44권4호
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• pp.309-315
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• 1999

Rice seedling test was conducted to check the loging tolerance at ripening stage through evaluating the root characters. Thirteen Korean and foreign rice cultivars with direct seeding adaptable or high quality characteristics were grown in a cell pot and under submerged paddy. The root characters and pushing resistance of rice hill were determined at seedling and ripening stage, respectively. The diameter of crown root at the 7th and 8th leaf stages was thicker in lodging tolerance cultivars than those of others and showed significant-positive correlation with both pushing resistance and crown root diameter of mature plants. Also, the tensile strength of crown root at the 7th and 8th leaf stage showed highly positive correlation with the tensile strength of crown root of mature plants. The number of crown root at 7th leaf stage was significant-positively correlated with that of mature plant. The diameter of seminal root was not significantly correlated with the diameter of crown root throughout the whole growth stage. These results indicate that the diameter, tensile strength and number of crown root associated with root lodging tolerance can be detected with the seedling at about 7th or 8th leaf stage, and the seedling test using the cell pot is an useful and practical method to select lodging tolerant cultivars or lines of rice based on root characters, especially diameter of crown root.

• 드라이브 ㆍ 컨트롤
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• 제15권3호
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• pp.43-48
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• 2018

The hydraulic control valve, used in the CPB (cold-pad-Batch) cold dyeing system, passes through a pressurized material that absorbs the dye. The hydraulic control of the hydraulic control panel shall be driven in a uniform and precisely controlled manner, as it interferes directly with the dyschromatism. In this study, an acceleration test model was employed to verify the durability of the hydraulic control of the hydraulic control panel, which was manufactured by the scenic model, and the pre-roll angle was analyzed before the performance of acceleration test. Based on the change in the amount of deformation of the padder roll the durability of the padder roll was analyzed along with verification of the durability of the skin and the rubber coating in contact with the fabric. Furthermore, the accelerated test method used for hydraulic controlled multi-cell padder rolls was verified.

• 한국버섯학회지
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• 제21권1호
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• pp.8-14
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• 2023

This study aimed to verify the whitening effect of Cordyceps militaris, which is distributed in several countries worldwide, including Korea, Japan, and China, and has various medical effects. To screen the efficacy of C. militaris, the inhibitory activity of tyrosinase, which was 66% at a concentration of 1 mg/mL, was measured. Thereafter, the survival rate of melanoma cells was measured, and cell experiments were conducted at a concentration of 90% or more in which C. militaris was not toxic to cells. After measuring the inhibitory effect of TRP-1, TRP-2, tyrosinase protein, and mRNA expression, which are factors influencing melanin synthesis, C. militaris was found to decrease in all factors, with an expression level that was significantly lower compared to quercetin. This confirmed that C. militaris stimulated with LED has excellent whitening activity and can be used as a functional whitening cosmetics material.

• 한국항행학회논문지
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• 제14권3호
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• pp.426-431
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• 2010

태양전지용 웨이퍼 제조공정에 있어 Slurry의 가격 비중은 약 68% 정도로 매우 큰 비중을 차지하고 있기 때문에, 제조비용 절감측면과 Wafering 원가혁신 및 산업폐기물 처리비용 절감효과, 환경오염 방지를 위해 Slurry의 순환 사용은 필수적이다. 기존 Slurry를 재생하는 방식은 물리적인 원심분리(데칸터) 방식을 이용한 방법을 사용하고 있으나 미분(微粉)이 남아 있어 재생품질에 한계가 있고, 대부분 액체, 100% 오일과 분리되지 않은 상태로 재생된다. 이 상태를 건조시키는 경우도 순도가 많이 떨어진다. 본 논문에서는 원심분리(데칸터) 방식과 케미컬 방식을 함께 사용하여, 태양전지 Wafering 공정에서 필수적인 Slurry를 재생함에 있어, 원심분리에 의한 재생품질의 한계를 극복할 수 있는 재생기술을 개발하였고, Slurry 재생에 대한 Total Solution을 제공하여 성능을 향상시키고 재생 회수율을 높였다.

• BMB Reports
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• 제38권5호
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• pp.526-532
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• 2005

A lectin with in-vitro anticancer activity against established human cancer cell lines has been purified by affinity chromatography on asialofetuin-linked amino activated silica beads from the tubers of Arisaema tortuosum, popularly known as Himalayan Cobra lily, a monocot plant from the family Araceae. The bound Arisaema tortuosum lectin (ATL) was eluted with glycine-HCl buffer, pH 2.5. ATL was effectively inhibited by asialofetuin, a complex desialylated serum glycoprotein as well as by N-acetyl-D-lactosamine, a disaccharide. It gave a single band corresponding to a subunit molecular weight of 13.5 kDa in SDS-PAGE, pH 8.8 both under reducing and non reducing conditions. When subjected to gel-filtration on Biogel P-200, it was found to have a molecular weight of 54 kDa, suggesting a homotetramer structure, in which individual polypeptides are not bound to each other with disulfide bonds. ATL is a glycoprotein with 0.9% carbohydrate content, stable up to $55^{\circ}C$ and at pH 2 to 10. The lectin had no requirement for divalent metal ions i.e. $Ca^{2+}$ and $Mn^{2+}$ for its activity. However, as reported for other monocot lectins, ATL gave multiple bands in isoelectric focusing and Native PAGE, pH 8.3. The lectin was found to inhibit in vitro proliferation of human cancer cell lines HT29, SiHa and OVCAR-5.

• 정보처리학회논문지A
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• 제19A권2호
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• pp.85-92
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• 2012

본 논문에서는 다수의 고속 이동체들의 위치를 측정할 수 있는 확장성 있는 실시간 위치 측정 시스템을 제안한다. 제안된 시스템에서는 위치 서비스가 필요한 영역을 확장 시 기본 단위인 매크로셀이라고 불리는 정사각형의 격자들로 나누고, 한 매크로셀은 $N{\times}N$ 개의 마이크로셀로 나눈다. 마이크로셀의 각 꼭짓점에는 위치 기준 노드가 중앙에는 중재 노드가 설치된다. 위치를 측정하고자 하는 이동체는 우선 중재 노드와의 통신을 통하여 위치 측정을 위한 허가를 받아야 한다. 그러므로 한 마이크로셀내에서는 오직 허가된 하나의 이동 노드만이 위치 기준 노드들과 연속적으로 통신하면서 자신의 위치를 계산할 수 있다. 제안된 시스템의 성능을 측정하기 위하여, 제안된 시스템을 모델링하고 시뮬레이션 하였다. 시뮬레이션 결과 제안된 시스템은 위치 측정을 위한 통신 시간이 짧고 고속 이동체의 위치를 계산할 경우 오차가 적은 것으로 나타났다.

• The Korean Journal of Physiology and Pharmacology
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• 제14권4호
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• pp.229-233
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• 2010

Amyloid precursor protein binding protein-1 (APP-BP1) binds to the carboxyl terminus of amyloid precursor protein and serves as a bipartite activation enzyme for the ubiquitin-like protein, NEDD8. Previously, it has been reported that APP-BP1 rescues the cell cycle S-M checkpoint defect in Ts41 hamster cells, that this rescue is dependent on the interaction of APP-BP1 with hUba3. The exogenous expression of APP-BP1 in neurons has been reported to cause DNA synthesis and apoptosis via a signaling pathway that is dependent on APP-BP1 binding to APP. These results suggest that APP-BP1 overexpression contributes to neurodegeneration. In the present study, we explored whether APP-BP1 expression was altered in the brains of Tg2576 mice, which is an animal model of Alzheimer's disease. APP-BP1 was found to be up-regulated in the hippocampus and cortex of 12 month-old Tg2576 mice compared to age-matched wild-type mice. In addition, APP-BP1 knockdown by siRNA treatment reduced cullin-1 neddylation in fetal neural stem cells, suggesting that APP-BP1 plays a role in cell cycle progression in the cells. Collectively, these results suggest that increased expression of APP-BP1, which has a role in cell cycle progression in neuronal cells, contributes to the pathogenesis of Alzheimer's disease.