http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
방병관,강정숙,채한정,김형룡 원광대학교 생체재료·매식연구소 1998 원광생체재료·매식 Vol.7 No.1
Nitric oxide(NO) is known to be implicated in bone metabolism, especially as a mediator of cytokine effects for remodeling of bone tissue. In this study we examine whether NO affects osteoblast activation of osteoblast or osteoclastic differentiation in primary mouse osteblast-like and osteosarcoma ROS 17/2.8 cells. Primary osteoblast and ROS 17/2.8 cells release NO upon stimulation of interleukin-1β, tumour necrosis factor-α, and interferon-γ. Sodium nitroprusside, a donor of NO, increases the activity of alkaline phosphatase in ROS 17/2.8 cells as well as the number of calcified nodule formations in primary mouse osteoblast-like cells. Sodium nitroprusside also completely also completely inhibites 1 α,25-(OH)_2D_3-induced osteoclast genration in a high concentration (100 μM). However, low concentrations of sodium nitroprusside (3∼30 μM) significantly increase the generation of osteoclasts. These results that NO appears to be an important regulatory molecule in the processes of bone formation and resorption. Hence, NO may be involved in the pathogenesis of bone loss in diseases associated with cytokine activation such as periodontal disease and rheumatoid arthritis.
저수지 내 수상태양광의 전압 강하에 의한 직류 송전 손실
방병관(Byeong Gwan Bhang),우성철(Sung Cheol Woo),이원빈(Wonbin Lee),최진호(Jin Ho Choi),신승욱(SeungWook Shin),이철성(ChulSung Lee),박미란(MiLan Park),원창섭(Changsub Won),안형근(HyungKeun Ahn) 한국신재생에너지학회 2020 신재생에너지 Vol.16 No.1
In Floating PV (Photovoltaic) systems, PV modules are installed on water by utilizing the surface of idle water such as a reservoir and multipurpose dam. A floating PV system, therefore, has the advantage of efficiency in national land use and improved energy yield owing to cooling effect compared to on-land PV systems. Owing to the limitation of installation environment for a floating PV system, the system, however, has the disadvantage of an increase in transmission distance of DC (Direct current) cables. A longer transmission distance of a DC cable results in greater power loss due to a voltage drop. This leads to a decline in economic feasibility for the floating PV system. In this paper, the economic analysis for 10 floating PV systems installed in a reservoir has been conducted in terms of a change in annual power sales according to the variation of transmission losses depending on the factors affecting the voltage drop, such as transmission distance, cross-section area of underwater cable, the presence of joint box, and PV capacity.
Dexamethasone has an Inhibitory Effect on Tumor Necrosis Factor-induced Apoptosis in MC3T3E1 Cells
Bang, Byung Kwan,Han, Kyung Soo 원광대학교 치의학연구소 2002 圓光齒醫學 Vol.11 No.2
치주질환을 포함한 염증성 질환에서 TNF-α의 중요성은 이미 많이 알려진 사실이다 TNF-α는 pro-inflammato교 cytokine중 하나로 여러 염증성 질환에 주요 매개인자로서 조골세포의 세포고사에 관여하는 것으로 이미 보고된 바 있다 본 연구는 이 TNF-α로 인한 세포고사 조건에서 부신피질 호르몬이면서 항염증작용이 있는 것으로 알려진 detamethasone을 12 시간 전에 전처치 시, TNF-α로 인한 세포고사를 억제함을 발견하여, 이의 작용 기전을 설명함으로써 dexamethasone의 항염 효과 등의 기전을 규명하고자 하였다. TNF-α의 처리시 ceramide의 유리를 확인하였으머 외부에서 ceramide처치시의 signal 즉, JNK/SAPK 활성, NF-κB 활성, caspase-3 활성등에 있어 유사하거나 약간 빠른 것을 확인함으로써 TNF-α로 인한 죽음이 ceramide를 경유할 것임을 암시하고 있다. 또한 dexamethasone처리군에서 ceramide유리의 억제를 보였으며 TNF-α로 인한 JNK/SAPK 활성, NF-κB활성, caspase-3 cysteine pretense 및 cytohrome c 유리가 조절됨을 보임으로써 dexamethasone의 세포고사의 보호기전을 설명하고 있다. 본 연구는 dexamethasone의 항염 기전을 다른 각도에서 제시 할 수 있었다.
View Factor를 고려한 마이크로그리드 적용용 고효율 P-Type Si 양면형 태양광 모듈의 출력량 예측
최진호,김광순,차혜림,김규광,방병관,박소영,안형근,Choi, Jin Ho,Kim, David Kwangsoon,Cha, Hae Lim,Kim, Gyu Gwang,Bhang, Byeong Gwan,Park, So Young,Ahn, Hyung Keun 한국전기전자재료학회 2018 전기전자재료학회논문지 Vol.31 No.3
In this study, 20.8% of a p-type Si bifacial solar cell was used to develop a photovoltaic (PV) module to obtain the maximum power under a limited installation area. The transparent back sheet material was replaced during fabrication with a white one, which is opaque in commercial products. This is very beneficial for the generation of more electricity, owing to the additional power generation via absorption of light from the rear side. A new model is suggested herein to predict the power of the bifacial PV module by considering the backside reflections from the roof and/or environment. This model considers not only the frontside reflection, but also the nonuniformity of the backside light sources. Theoretical predictions were compared to experimental data to prove the validity of this model, the error range for which ranged from 0.32% to 8.49%. Especially, under $700W/m^2$, the error rate was as low as 2.25%. This work could provide theoretical and experimental bases for application to a distributed and microgrid network.