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AN(Acrylonitrile) 생산 공장에 공해물질 종합 관리 방법의 적용
김병직 崇實大學校 生産技術硏究所 2001 論文集 Vol.31 No.-
Mass integration technique was applied to AN production plant. Ammonia in wastewater stream was the key target pollutant in this process. To increase the AN production, the bio-treatment facility for ammonia wastewater stream was considered the bottle-neck. The objective of this research was to debottle-neck the process without purchasing the new bio-treatment facility. In an attempt to reduce the pollutant and debottle-neck the process, systematic mass integration technique was implemented. The improved flow sheet was simulated by Chemical process Simulator(ASPEN +) for stream and cost analysis. The simulation results showed that AN production has increased by 18%, fresh water usage was decreased by 7.2㎏/s. In conclusion, the existing waste treatment facility can have 150% more surplus capacity through process integration and can be no more bottle-neck step.
막여과공정에서의 비용계산식 모델링 및 조작변수에 따른 비용의 변화에 대한 연구
김병직,왕진수 崇實大學校 生産技術硏究所 1996 論文集 Vol.26 No.1
A cost model for water filtration system using membrane was studied. Capital cost was the sum of non-membrane cost and membrane cost. And Operating cost consisted of energy, chemical, and membrane replacement cost. Integrated mathematical model was developed to estimate the capital and operating cost of variouw size membrane systems. The mathematical medel was translated into C program for convenient and quick use. By use of the program developed, the effect of Permeate Flux, Membrane diameter and service life, cross-flow velocity on total cost was studied. The results of sencitivity analysis are as follows: The cost was inversely related to permeate flux since the number of modules increased as reducing thepermeate flux. The membrane life had a significant effect on the operating cost. Cost of membrane per module decreased with increasing membrane element diameter.The head-loss across the membrane module was inversely proportional to the diameter of the element. Also deposition of material on the membrane surface could be reduced by increasing cross-flow velocity.
중공사 형태의 막여과 공정에서 압력 강하 및 에너지 소비에 관한 연구
왕진수,김병직 崇實大學校 生産技術硏究所 1995 論文集 Vol.25 No.2
Pressure difference is required to purity the untreated water in a membrane-based process. It affects the initial cost and operating cost of the system. Generally, the greater the pressure difference is, the more expensive the water filtration system is. From the experimental data and the derived equations, several design parameters that affect the pressure drop were investigates. The effect of temperature, crossflow velocity, and internal diameter of a fiber on the pressure drop was studied. Within the temperature range of 0℃ to 40℃, as feed water temperature increased, pressure drop required to purify the quantity of the untreated water decreased. And as the crossflow velocity increased, the pressure drop increased. The diameter of 1mm was thought to be a critical size. Below that size, as decreasing the diameter the pressure drop increased sharply. On the other hand, above that size, the pressure drop did not change much with increasing the diameter. Also, the energy cost to produce 1 ton of water was calculated for various modes of membrane-based water treatment systems.
정상인에서의 Substance P와 VIP에 의한 발적과 팽진 유발 실험
류병직(byung Jick Ryu),최지호(Jee Ho Choi),성경제(Jai Kyoung Koh),고재경(Kyung Jeh Sung) 대한피부과학회 1995 大韓皮膚科學會誌 Vol.33 No.3
Background : Despite concern about information of neuropeptide, the has been no baseline study of neuropeptide in Koreans. Objective : The purpose of the study was to investigate the skin sinsitivity of substance P and VIP in normal healthy persoas. Meihods : We prepared 1000pM, 100pM, 10pM solution of substan P 1-11, substnace P 1-7, substnace P 7-11, and VIP. We injected intradermally 50ul of the br ve solutions on 12 sites of both forearms in addition plaebo. We measured the size of the area of flare and wheal along time. We repeated the same test after antihistamine intake. Results : Flare and wheal respinses were dose dependent. Injection of substance P 1-7 did not evoke wheal responses and injection of substance P 7-11 did not wake flare responses. Flare responses of substance P 1-11, ubstance P 7-11, VIP were inhibiteb antihistamine and wheal responses of VIP were inhibitedly antihistamine. Conclusion : N-terminal of subtance P is responsible for flarers onses and C-terminal of substnace P is responsible for wieal responses. Flare responses of sisance P were mediated by histamine but wheal responses osubstance P were direct effect on postcapillary venule. Flare and wheal responses of VIF were mediated by histamine. (Kor J Dermato 1995;33(3): 497-503)
Prediction of skin penetration of Bifenthrin using in vitro micro-pig skin model
Ji-Hyun Bang(Ji-Hyun Bang),Hyun-Ok Ku(Hyun-Ok Ku),Byung-Suk Jeon(Byung-Suk Jeon),Hyobi Kim(Hyobi Kim),Kwang-Jick Lee(Kwang-Jick Lee),Yong-Sang Kim(Yong-Sang Kim),Hee Yi(Hee Yi) 한국예방수의학회 2019 한국예방수의학회 학술대회자료집 Vol.2018 No.-