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수행 평가 도구를 이용한 심화 · 보충형 수준별 교수 전략의 효과 : 고등학교 과학 전해질과 이온 단원과 산과 염기의 반응 단원
박서경 이화여자대학교 교육대학원 2006 이화교육논총 Vol.16 No.-
The purpose of this study was to develop the instructional strategy to apply 7th differentiated curricula on class and to examine its effect of the achievement, science-related attitude, and to identify what should be taken into account more carefully and what problems there were/ and ultimately to contribute to more efficient level-class instruction. The subjects in this study were 58 male and female students in their first year from a business high school in Seoul. They were divided into experimental and control group. The experimental group was subdivided into further study group and supplementary group according to the results of a diagnostic test they took after completing the basic learning course. The control group received further and supplementary education not being subdivided into small groups. To find out the effect of the level-class instruction, pretest and posttest were implemented to measure the science studies achievement and science-related attitude of the students. The collected data were analyzed with SPSS program, and the ANCOVA was utilized. The findings of the study were as below. First, the experimental group exposed to the further or supplementary instructional strategy was significantly different from the control group that was not exposed to it in science achievement(P<.05). There appeared no significant difference on the further study subgroup but was significant difference on the supplementary subgroup. Second, there were the marks of progress generally but the level-class wasn't significantly different on the results of the science-related attitude analysis(P>.05). The further study subgroup in the experimental group showed the rise of marks of the attitude but the further study subgroup in the control group degraded, and it was significantly different. But in supplementary subgroup, there was progress found both in the experimental and the control group, which were not significantly different. As it were, the class applied differentiated instructional strategy showed affirmative effect on science-related attitude for the further study students, and on science achievement for the supplementary students. Therefore, there might be better learning effect if the teachers classify the students' levels by performance assessment and use differentiated instructional strategy for individual levels properly in the scene of our class where students of various levels are gathered in one classroom.
흰쥐의 담취액 분비에 미치는 수종 중추흥분 및 억제물질의 영향
박서경,Park, Suh-Kyung 대한약리학회 1976 대한약리학잡지 Vol.12 No.1
The clinical abuse of C.N.S. stimulants during recent years has directed particular attention. Effect of various organs other than C.N.S. was also extensively investigated with those agents. It has been shown that, although there is a wide variation in sensitivity between species, caffeine stimulates gastric secretion in man, cat, guinea pig and dog. Roth and Ivy(1944) reported that caffeine and histamine acted synergistically in stimulating gastric secretion in the cat. Vaille et al(1966) studied that production of pancreatic juice in the rat was enhanced, but bile secretion was not affected by caffeine. In clinical study the effect of chlorpromazine on the external pancreatic secretion in the 24 subjects, the volume fell more than 20% in 7 subjects. (Skajaa et al 1960) It is widely known that C.N.S. stimulants enhanced spontaneous motor activity in the mice, while tranquilizers depressed the activity. Woo (1975) reported that the group of mice treated with chlorpromazine showed markedly inhibited motor activity and in the group of mice treated with amphetamine, there was a significant increase in the motor activity. The purpose of the present experiment was to study the effects of C.N.S. stimulants and depressant on the exocrine pancreas, and on the spontaneous motor activity in the rats. The results obtained are summarized as follows. 1. In animals treated with xanthine derivatives, the volume of pancreatobiliary secretion was markedly increased. 2. Total bilirubin output was elevated markedly in the xanthine derivatives and imipramine treated animals. The bilirubin concentration was increased in xanthine derivatives treated group. 3. The concentration of cholate in the bile was decreased in the chlorpromazine treated group. 4. The activity of lipase in the pancreatobiliary juice was elevated markedly in the xanthine derivatives treated group only. 5. In the all experimental groups, the activity of amylase in pancreatobiliary juice was significantly elevated. 6. In the caffeine treated group, spontaneous motor activity was markedly increased in $30{\sim}60$ minutes, and the amphetamine treated group showed the increased motor activity in first 30 minutes. 7. The group of rats treated with chlorpromazine showed markedly inhibited motor activity after 30 minutes, and the imipramine treated group showed similar result but less inhibition.
Preparation of Porous Carbons Under Basic Condition by Soft Template Method for Carbon Capture
박서경,한태율,이제승 대한화학회 2015 Bulletin of the Korean Chemical Society Vol.36 No.5
Microporous and mesoporous carbons have been prepared by a soft template method using 2,2′-biphenol as a precursor. The porosity of carbons could be controlled by varying the amount of block copolymer used as a soft template and the specific surface areas measured were as high as 648 m2/g with a pore volume of 0.43 cm3/g. The surface areas of prepared carbons were further increased up to 1778 m2/g with a pore volume of 0.75 cm3/g after heat treatment under ammonia gas environment. Although the prepared pristine carbons had lower surface areas than commercial activated carbon, they exhibited higher carbon dioxide (CO2) adsorption capacity. The CO2 adsorption capacity of ammonia-activated carbons further increased up to 2.98 mmol/g at ambient temperature and pressure.
Effect of Functionalized Ionic Liquids on the Stability of V(acac)3
박서경,오철진,김상길,이병준,이지현,이제승 대한화학회 2018 Bulletin of the Korean Chemical Society Vol.39 No.9
V(acac)3, one of the most promising candidates for the active material of non-aqueous RFB, has various drawbacks such as the change of color, precipitation, and lowering capacity during RFB operation due to the sensitiveness of V(acac)3 to oxygen. The stability of V(acac)3 under air was studied using electrochemical analysis, FT-IR, UV?Vis, and XPS spectroscopic methods. The 0.01 M solution of V(acac)3 turns to VO(acac)2 in 3 days under air implying that V(acac)3 is sensitive to the O2 (g) in the air. The ionic liquid (IL) containing functional group was added to V(acac)3 solution as the supporting electrolyte. Although the addition of IL, bearing the electron withdrawing group(s) on the cation, almost did not affect the stability of V(acac)3, the stability of V(acac)3 was significantly increased up to 7 days in the presence of IL containing an electron donating group on the cation.
Preparation and properties of novel ionogels using ionic liquid
박서경,이제승,이지현 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.0
Novel ionic mixtures of LiTf2N and an imidazolium-based cation with phosphate anion containing ethylene oxide unit were prepared. According to the experimental results such as optical properties, small angle X-ray scattering (SAXS) and electrochemical analysis, the prepared ionic mixtures were self-assembled into the smectic-orderd structure. Interestingly, the ionic mixtures showed higher ionic conductivity than pure ionic liquid despite their solid-like viscoelasticity. Based on the experimental results, it could be suggested that the smetic ordered structure formed by Coulombic interactions between ion species in the mixtures and the ionic transport could be enhanced by the structure.
박서경,이제승 한국공업화학회 2017 한국공업화학회 연구논문 초록집 Vol.2017 No.1
Porous carbon materials have been prepared using polysaccharides (cellulose, chitosan, alginic acid) as raw materials by heat treatment at nitrogen atmosphere. The prepared carbons were activated under ammonia atmosphere at high temperature. Most prepared carbons contained both of micro- and mesoporous pore structures. The surface areas of prepared carbons increased from 258.2 to 1032.0 ㎡ g<sup>-1</sup> and pore volumes also increased from 0.15 to 0.65 ㎤ g<sup>-1</sup> after the ammonia activation process. Coin cell type electric double layer capacitor (EDLC) was assembled and the capacitance was measured.