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1996년도 제35차 대한소화기학회 추계학술대회 / 일반연제 : 위장관 ; 위내시경을 시행한 소아에서 위액 pH 변화와 위액 pH 에 따른 위점막의 조직학적 변화
정양숙,임재영,조윤경,김윤옥,최명범,우향옥,윤희상,고경혁,백승철,이우곤,조명제,이광호 ( Y . S . Chung,J . Y . Kim,Y . K . Cho,Y . O . Kim,M . B . Choi,H . O . Woo,H . S . Youn,G . H . Ko,S . C . Baik,W . K . Lee,M . J . Cho,K . H . Rhee ) 대한소화기학회 1996 대한소화기학회지 Vol.28 No.1
조명제,김종환 한국전통과학기술학회 1994 한국전통과학기술학회지 Vol.1 No.1
Korea was well known as an abundant gold reserved country since hundreds of years. Originally, gold had produced from sand belt of streams, therefore it was small in quantity from one. In the end of 19th century, the water wheel for grinding are contributed to accelerate the amount of gold production according to the policy of mining development by TAEWONKUN. Combined technology of running water wheel and arnalgum method saved input power and water streams and yield of gold production was up to more than 30%. The type of water wheel was named as Kagoshima but they are remained in riddle whether they were Korean own made.
황규홍,김종강,조명제,최정림,박정권 경상대학교 생산기술연구소 2001 工學硏究院論文集 Vol.1 No.-
To improve the mechanical and chemical properties of unfired A12O3-C refractories, which is widely used in metal line of steel-making ladle, MgO was added as a matrix powders and the degree of spinel formation was studied, Because the spinel was formed at the contact areas between A12O3 and MgO particles and the volume of in-situ formed spinel increased more abnormally at the side of A12O3 particles than MgO, A12O3 aggregates was more recommendable than MgO aggregates. So to compare the degree of spinel formation in the A12O3-MgO-C(AMC) refractories, two kinds of A12O3 aggregates was added in different content ratio and their effects on physical properties such as permanent volume expansion were examined. For A12O3 aggregates, low purity fused A12O3 (BFA) was more preferable than the high purity fused A12O3 (WFA) due to high density and the high degree of spinel formation. And corrosion resistance was increased with the amount of MgO added, and the finer the MgO powder, the better the residual expansion and minute structure formation was observed. But in case of a sudden increasement of spinel phase air gap would be appeared around aggregates and resulting crack showed deteriorative effect in anti-corrosion, so the appropriate quantity of MgO and it's grain size could be controlled for optimal residual expansion due to spinel formation and advancement of corrosion resistance by structural stability.
황규홍,배원태,조명제,연상흠,정두화 경상대학교 생산기술연구소 2003 工學硏究院論文集 Vol.19 No.-
For improving the oxidation resistance of pitch carbon, anti-oxidant and graphite were incorporated with fused pitch and followed by palletizing by cooling and pulverizing. Oxidation resistances were evaluated by DTA-TG, weight loss in crucibles and in MgO castables. By increasing the softening point of pitch, the oxidation resistance could be increased. But due to relatively small increase it was not preferable to refractories. And by adding anti-oxidant powders such as Al and/or B_(4)C the oxidation resistances of pitch carbons could be increased than the increasement of softening point. But the oxidation resistance of pitch carbons could not exceed that of natural graphite. So in order to utilizing graphite which have high oxidation resistance but poor water resistance, graphite was impregnated in pitch and pulverized to pellet. Graphite containing pitch, especially containing Al and/or B_(4)C also in pitch, was excellent in oxidation resistance among all type of pitch. Finally pitch and graphite containing pitchs were incorporated in MgO castables by using surfactant and defloculant very well and shows very high oxidation and moisture resistances to utilizing MgO-C castables.