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속단의 dichloromethane 분획물이 마우스 두개골 세포의 분화에 미치는 영향
김동진,윤정호,정의원,유윤정,김윤철,유형근,김종관,최성호,Kim, Dong-Jin,Yun, Jeong-Ho,Jung, Ui-Won,Yoo, Yun-Jung,Kim, Yun-Chul,You, Hyung-Keun,Kim, Chong-Kwan,Choi, Sung-Ho 대한치주과학회 2004 Journal of Periodontal & Implant Science Vol.34 No.4
The purpose of this study was to evaluate the effects of DFPR on differentiation of mouse calvarial cell in vitro, to examine the possibility for periodontal regeneration. $10{\mu}g/ml$ of DFPR was used as experimental concentration. osteogenic medium only was assigned as control, Experimental 1 was supplemented with 10nM dexamethasone, Experimental 2 with $10{\mu}g/ml$ DFPR and Experimental 3 with l0nM dexamethasone + $10{\mu}g/ml$ DFPR. cellular activity was evaluated by MTT method at 8, 12, 16 days, expression of mRNA of ALP, osteopontin, osteocalcin, collagen type-l was detected by RT-PCR method at 4, 8, 12, 16 days of culture. extent of mineralization was observed by Von Kossa staining at 16 day of culture. The results are as follows 1)Any acceleration of differentiation was not observed at expression of differentiation marker, 2) Decrease in expression of extracelluar matrix and in bone nodule formation was observed The results suggested that DFPR have negative effect on the rate of differentiation on rat calvarial cell, decrease extracelluar matrix formation ,decrease bone nodule formation. Ongoing studies are necessary in order to determine effect of DFPR on periodontal regeneration.
김동진,김건협,유익근,이규현,이태진,이용택,차기철 ( Dong Jin Kim,Gun Hyub Kim,Ik Keun Yoo,Kyu Hyun Lee,Tae Jin Lee,Yong Taek Lee,Gi Cheol Cha ) 한국물환경학회 1997 한국물환경학회지 Vol.13 No.2
A downflow biological aerated filter (BAF) packed with porous ceramic media was developed to remove the organic matter in paper industry wastewater. For about 120days, average effluent BOD, COD, and SS were stably kept to less than 20㎎/1. A reduction of 80∼90% for BOD and 75∼90% for COD was obtained at empty bed contact time (EBCT) of 1.2∼11.8 hours. There was no significant difference in removal efficiency up to the hydraulic and organic load of 40㎥/㎡day, 5㎏BOD/㎥day, respectively. The backwashing cycle at once a day was enough to maintain stable operation of BAF reactor.
2가 유로피움으로 활성화된 NaCaPO<sub>4</sub>의 합성과 광 특성
김동진,박인용,이종원,김규진,김병규,Kim, Dong-Jin,Park, In-Yong,Lee, Jong-Won,Kim, Kyu-Jin,Kim, Byoung-Gyu 한국재료학회 2006 한국재료학회지 Vol.16 No.10
In this study, divalent europium-activated $NaCaPO_4$ green phosphor powders were prepared by the chemical synthetic method followed by heat treatment in reduced atmosphere, and the crystal structures, morphologies and photoluminescent properties of the powders were investigated by x-ray powder diffraction, scanning electron microscope and spectrometer for the first time. The effects of Ca/P and Na/Ca mole ratios on the final products were also investigated. The influences of input amount change of europium as the activator on the light emission intensity were studied, and the resulting concentration quenching phenomenon was observed. The optimized synthesis conditions obtained in this study were Ca/P mole ratio 1.2, Na/Ca mole ratio 3.0 and 4 mole%Eu. The peak wavelength was 505 nm for all the samples. The result of excitation spectrum measurement indicated that the excitation efficiency was high for the long-wavelength UV region. It was thus concluded that the samples prepared in this study can be successfully applied for the light-emitting devices such as LED excited with long-wavelength UV light sources.
김동진,여동진,이기표,Kim, Dong-Jin,Yeo, Dong-Jin,Rhee, Key-Pyo 한국시뮬레이션학회 2010 한국시뮬레이션학회 논문지 Vol.19 No.3
It is necessary for the ship dynamic models to realize ship dynamics and to achieve the real-time analysis in the manoeuvring simulation. Generally, simple dynamic models, such as 1st-order differential equation models of turning angle, turning rate, and forward speed, are used in the manoeuvring simulation for multiple ships. Ship dynamic modeling and parameter estimation methods based on its turning test results are proposed in this paper. Parameter estimation methods for the constant speed model and the speed-changing model are mathematically developed and verified by comparing with turning test results of a real ship.
김동진,황성식,김정수,김홍표,Kim, Dong-Jin,Hwang, Seong Sik,Kim, Joung Soo,Kim, Hong Pyo 한국압력기기공학회 2009 한국압력기기공학회 논문집 Vol.5 No.2
Nuclear power plants (NPP) using Alloy 600 (Ni 75wt%, Cr 15wt%, Fe 10wt%) as a heat exchanger tube of the steam generator (SG) have experienced various corrosion problems by ageing such as pitting, intergranular attack (IGA) and stress corrosion cracking (SCC). In spite of much effort to reduce the material degradations, SCC is still one of important problems to overcome. Especially lead is known to be one of the most deleterious species in the secondary system that cause SCC of the alloy. Even Alloy 690 (Ni 60wt%, Cr 30wt%, Fe 10wt%) as an alternative of Alloy 600 because of outstanding superiority to SCC is also susceptible to leaded environment. An oxide on SG tubing materials such as Alloy 600 and Alloy 690 is formed and modified expanding to complex sludge throughout hideout return (HOR) of various impurities including Pb. Oxide formation and breakdown is requisite for SCC initiation and propagation. Therefore it is expected that an oxide property such as a passivity of an oxide formed on steam generator tubing materials is deeply related to PbSCC and an inhibitor to hinder oxide modification by lead efficiently can be found. In the present work, the SCC susceptibility obtained by using a slow strain rate test (SSRT) in aqueous solutions with and without lead was discussed in view of the oxide property. The oxides formed on Alloy 600 and Alloy 690 in aqueous solutions with and without lead were examined by using a transmission electron microscopy (TEM), an energy dispersive x-ray spectroscopy (EDXS), an x-ray photoelectron spectroscopy (XPS) and an electrochemical impedance spectroscopy (EIS).
초점 - 축산계열화법 제정 공청회 및 내용 - 계열화 사업 공정거래와 상호협력 도모한다
김동진,Kim, Dong-Jin 대한양계협회 2011 월간 양계 Vol.43 No.11
축산계열화법에 대한 공청회가 지난 13일 국회의원회관 제3간담회의실에서 김학용 의원(한나라당) 주최, 농림수산식품부 주관으로 개최되었다. 이번에 추진되고 있는 '축산계열화법'은 빠르면 오는 11월 국회에 의원입법으로 상정되어 처리가 될 예정이다. 본고는 그 동안 수차례의 회의와 협의를 거쳐 제정을 앞두고 있는 '축산계열화법'의 주요 내용을 소개코자 한다.