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유동층 연소로에서 유, 무연탄 혼합연소시 탈황에 관한 연구 -천연석회석을 이용한 황산화물 제어-
조상원,민병철,정종현,전영화,김대영,정덕영 한국환경보건학회 1997 한국환경보건학회지 Vol.23 No.3
It has been studied that SO$_2$ removal efficiency of anthracite-bituminous coal blend combustion in a fludized bed coal combustor. The objectives of this study were to investigate SO$_2$ removal characteristics of coal blend combustion with Ca/S, anthracite fraction, bed temperature, and limestone size. The experimental results were presented as follows First, the effect of the desulfurization by the dia size of limestone was great and SO$_2$ removal efficiency was highest in limestone dia 631 $\mu$m. Second, as air velocity increased, the desulfurization rate decreased a little. But the difference of the desulfurization rate according to air velocity was not too large. As the height of fluidized bed combustor increased regardless of air velocity, SO$_2$ concentration tends to increase largely. Third, as Ca/S mole ratio incresed, SO$_2$ desulfurization rate incresed rapidly up to Ca/S mole ratio 3 while the desulfurization rates did not increse too largely in the range of more than the level. Forth, the bed temperature had a great effect on the desulfurization rate and the desulfurization rate tended to increase slightly as anthracite fraction increased.
조상원,김영식 한국환경보건학회 2002 한국환경보건학회지 Vol.28 No.5
We have studied that the prediction of desulfurization efficiency by limestone in fluidized-bcd coal combustor. The results were presented as follows: Firstly. the bed temperature had a great deal of effect on the desulfurization and the optimum temperature of limestone was 850℃-900℃. Secondly. as the velocity and temperature increased. k. K and the desulfunzation efficiency increased. So. Ks Kd highly depended on the air velocity and bed temperature. and Ks Kd were 82.53 mm/sec 0.0041/sec at 0.2 m/sec. 850℃. Ks Kd were 125.62 mm/sec. 0.00532/sec at 0.3 m/sec. 800℃ respectively. And Ks Kd were 143.78 mm/sec. 0.OO568/sec at 0.3 m/sec. 850 C. Thirdly. as a result of desulfurization modeling. there was good agreement between theory and experiments as anthracite fraction inereased. At 3.0 of optimum Ca/S molar ratio. there was very good agreement between theory and experiments.
Comparative Evaluation of Sensitivity to Hexanal Between Human and Canine Olfactory Receptors
조상원,박태현 한국생물공학회 2019 Biotechnology and Bioprocess Engineering Vol.24 No.6
It is known that a dog possesses much better sense of smell than a human. It has been reported that a dog has advantages (compared to a human) in the number of olfactory receptor (OR) genes, proteins and cells, and also nasal structure. However, a definitive reason for superior sensitivity of the canine olfactory system remains controversial. In this study, we compared sensitivity of human and canine olfactory receptors relative to the same condition. Human OR (hOR2W1) and canine OR (cfOR0312), previously identified to recognize hexanal, were inserted to the pcDNA3 vector. This vector was transfected to HEK293 cells. Hexanal-discriminating ability of ORs was confirmed using Fura-2 AM, a dye which illuminates when binding to calcium ions flowing into cells once olfactory signaling occurs. Consequently, cfOR0312 was more sensitive to hexanal than hOR2W1. Comparison of OR sensitivity would be one of the major factors in clarifying difference of sensitivity between human and canine olfactory systems.
조상원,Jo, Sang-Won 대한출판문화협회 1995 출판저널 Vol.175 No.-
내 생애 가운데 50년을 '출판쟁이'로 보내온 데 대해 후회없는 것은 출판이 내 적성이었기 때문이다. 그동안 숱한 사람들이 나의 출판인생의 빗장을 열어주고 힘과 정을 주었다. 오랜 세월에 내 운명에 영향을 끼친 선후배가 수십을 헤아리니 어찌 이들이 베푼 갖가지 정을 잊겠는가. 나는 친구들의 큰 은혜 속에서 살아온 복된 사나이다.