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중학교 과학, 고등학교 공통과학, 및 화학 Ⅰ, Ⅱ 교과서의 물질 반응에 대한 연계성 연구
강지아(Ji a Kang),노봉오(Bong oh Ro) 조선대학교 교과교육연구소 2000 교과교육연구 Vol.21 No.1
The effectiveness of continuity of material changes in middle school and high school textbooks was investigated on the basis of the sixth curriculum. For this purpose, five types of classification rules are set up for analysis of the concept: initial, overlap, development, gap, and wide gap. The results indicated that development and gap categories were 50% and 30%, respectively, from middle school science textbooks to high school common science textbooks, and that overlap and development were 60% in the middle school science textbooks to chemistry Ⅰ textbooks in the high school. Well developed sequence of terms are basic law of atoms and molecules, molecular weight, and ion and chemical formulas. The areas of a big gap from middle school science textbooks to high school chemistryⅠand Ⅱ textbooks are atom energy level and electrode potentials. The chapter on chemical kinetics in the high school common science textbooks is a new concept and a gap from middle school science textbooks. Therefore this chapter needs to be changed to treat either acid-base equilibrium, solutions, or atom, molecules and ions.
연구논문 : 실험실 규모 이산화탄소 흡수장치의 연속운전시 모노에탄올아민열화 특성
강지아 ( Ji A Kang ),우원구 ( Won Gu Woo ),임호진 ( Ho Jin Lim ) 한국환경과학회 2016 한국환경과학회지 Vol.25 No.3
Oxidative and thermal degradation of alkanolamines for a promising CO2 capture technology of absorption might cause decrease in CO2 capture efficiency and formation of hazardous byproducts. In this study, characteristics of a representative absorbent of monoehtanolamine (MEA) were examined for a long term operation using a laboratory scale absorption system. An CO2 absorption system with ID 56 mm and absorption zone height 100 cm was developed for the characterization. Absorption solution of 30 wt% MEA was circulated at 100 mL/min to treat air with 15% CO2 and 1 ppm NO at 10 L/min. Temperatures of absorber and stripper were maintained at 40℃ and 120℃, respectively. For the course of 5 weeks continuous operation, MEA concentration was decreased approximately by 70% and CO2 removal efficiency was dropped from 95% to 65%. Ionic byproducts of NH4 +, NO2 -, and NO3 - were accumulated up to 48 g/mL, 0.2 g/mL, and 1.5 g/mL, respectively, tracking the variation of MEA concentration. Formation of various organic byproducts were also observed.
중학교 과학, 고등학교 공통과학, 및 화학 Ⅰ,Ⅱ 교과서의 물질 반응에 대한 연계성 연구
강지아,노봉오 조선대학교 사범대학 부설 교과교육연구소 2000 敎科敎育硏究 Vol.3 No.1
The effectiveness of continuity of material changes in middle school and high school textbooks was investigated on the basis of the sixth curriculum. For rhis purpose, five types of classification rules are set up for analysis of the concept: initial, overlap, development, gap, and wide gap. The results indicated that decelopment and gap categories were 50% and 30%, repaectively, from middle school science textbooks to high school common science textbooks, and that overlap and development were 60% in the middle school science textbooks to chemistry Ⅰ textbooks in the high school. Well developed sequence of terms are basic law of atoms and molecules, molecular weight, and ion and chemical formulas. The areas of a big gap from middle school science textbooks to high school chemictryⅠand Ⅱ textbooks are atom energy level and electrode potentials. The chapter on chemical kinetics in the high school common science textbooks is a new concept and a gap from middle school science textbooks. Therefore this chapter needs to be changed to treat either acid-base equilibrium, solutions, or atom, molecules and ions.