두 개의 막대자석에 의해 형성된 자기장에 대한 초.중등학생들의 오개념 유형 조사

박강은(Park, Kang Eun),박종호(Park, Jong Ho) 성신여자대학교 교육문제연구소 2010 교육연구 Vol.49 No.-

본 연구는 막대자석 두 개의 상호작용에 대한 초⋅중등학생들의 자기장에 대한 오개념 유형을 알아보기 위해 초등학교 3학년과 6학년 154명과 중학교 3학년의 96명 총 250명을 대상으로 자석 단원에 대한 학습이 끝난 시기인 2월에 설문조사를 실시하였다. 이을수의 자석 한 개에 대한 자기장 오개념 분류기준에 따라 막대자석 두 개에 의해 형성된 자기장에 대한 개념을 조사하여 분류하였으며, 학년별로 자기장의 오개념 유형과 그 정도를 비교하였다. 설문조사 분석으로부터, 자기장의 오개념 모형을 부분 분포 모형, 극 분리 모형, 균질 분포 모형, 장 모형의 4가지로 나누었으며, 모형을 대표할 수 있는 하위 유형을 두었다. 모형별 응답률은 균질 분포 모형에 대한 응답률이 가장 높았으며 장 모형, 부분 분포 모형, 극 분리 모형의 순으로 나타났다. 모형별 응답률의 학년 간 비교는 부분 분포 모형의 경우 초등학교 3학년이 가장 높았으며, 초등학교 6학년, 중학교 3학년 순의 경향을 보였다. 극 분리 모형은 주로 초등학교 6학년이 가장 높게 나타났다. 균질 분포 모형은 초등학교 6학년이 가장 높았으며 초등학교 3학년, 중학교 3학년 순의 경향을 보였다. 장 모형은 중학교 3학년이 가장 높았으며, 초등학교 3학년, 초등학교 6학년 순의 경향을 보였다. 장 모형에 대한 학년별 응답률은 중학교 3학년에 비해 초등학생이 현저하게 낮았다. 전체적으로 자기장을 바르게 인식하고 있는 학생의 비율이 상대적으로 중학교 3학년에 비해 초등학교 3학년과 6학년이 매우 낮음을 알 수 있었다. The purpose of this study was to investigate elementary and middle school student's misconception on magnetic field of interaction of two bar magnet. A survey was conducted of total 250 including 154 3rd and 6th grade elementary students and 96 3rd grade middle school students in February when learning about the unit of the magnet was completed. The models were provided deciding the classification standard by investigating the conception of the magnetic field in case two magnets are put according to Anderson's classification standard the misconception of the magnetic field about two bar magnets. We compared the types and the levels of the misconception of the magnetic field by each grade. We divided the model of the misconception of the magnetic field into 4 models including partial distribution model, pole separation model, homogeneous distribution model and field model and then the sub-model was prepared to represent the model. The response rate of each model had differences depending on disposition of the magnet. The response rate of homogeneous distribution model was highest, and appeared in the order of field model, partial distribution model, and pole separation model. For the response rate by each academic grade, in case of partial distribution model, elementary 3rd graders were highest, and it appeared in the order of elementary 6th graders, and middles school 3rd graders. In pole separation model, mainly elementary 6th graders appeared highest. In homogeneous distribution model, elementary 6th graders appeared highest and it appeared in the order of elementary 6th graders, and middles school 3rd graders. In field model, middles school 3rd graders were highest, and it appeared in the order of elementary 3rd graders, and elementary 6th graders. In the response rate of field model by each academic grade, elementary students were remarkably lower than middles school 3rd graders.

시금치 엽록체의 광합성 전자전달 활성에 미치는 Cd2+ 의 저해 효과

박강은(Kang Eun Park),정화숙(Hwa Sook Chung) 한국식물학회 1994 Journal of Plant Biology Vol.37 No.2

The effect of Cd^2+ on the electron transport rate of PSⅠ and PSⅡ was investigated in isolated spinach chloroplasts. In photosystem Ⅱ, the rate of electron transport was decreased as the concentration of Cd^2+ was increased from 1 to 100 μM. The inhibitory effect of Cd^2+ was reduced when diphenylcarbazide was added to the reaction medium, indicating that Cd^2+ affects primarily PSⅡ oxygen evolving complexes of thylakoid membrane. The inhibitory effect of Cd^2+ was reduced when Mn^2+ and Ca^2+ were added to the reaction medium, but the inhibitory effect was not fully relieved. Although the activity of PSⅡ was decreased significantly by the treatment of 50 μM Cd^2+, Fv/Fm was decreased slightly. However, the treatment of 100 μM Cd^2+ resulted in the marked decrease of Fv/Fm. In hotosystem Ⅰ, the rate of electron transport decreased as the concentration of Cd^2+ was increased from 0.2 to 3.2 mM. The inhibitory effect of Cd^2+ was decreased when the chloroplast treated with Cd^2+ was washed by centrifugation.

오존이 보리 ( Hordeum vulgare L. ) 엽록체의 광합성 활성에 미치는 영향

박강은(Kang Eun Park),정화숙(Hwa Sook Chung),송승달(Seung Dal Song),노광수(Kwang Soo Roh),송종석(Jong Suk Song) 한국식물학회 1995 Journal of Plant Biology Vol.38 No.4

The effects of 0.5 and 1.0 ppm of ozone on the developing chloroplast of barley (Hordeum vulgare L.) seedling during greening were investigated by PSⅠ and Ⅱ activities, chlorophyll fluorescence, and the contents of chlorophyll. Etiolated barley seedling was treated 0.5 and 1.0 ppm ozone for the first 4 h during greening. In 24 h greening experiment, the contents of chlorophyll were decreased by increasing ozone concentration from 0.5 ppm to 1.0 ppm. In 24 h greening experiment, Fo, Fv, Fm and qE were greatly decreased as the concentration of ozone was increased, but those were not considerably decreased in 48 h greening experiment. In another experiment, the developing barley seedling was treated with 0.5 and 1.0 ppm ozone for the last 4 h during greening period, which was 24 h or 48 h. In both experiments the PS Ⅱ activity was decreased as the concentration of ozone was increased, but not in PS Ⅰ activity. Fv, Fm and Fv/Fo were also decreased as the concentration of ozone was increased. qP and qR were strikingly decreased as the concentration of ozone was increased in both experiments.

황백화된 보리(Hordeum vulgare L.) 유식물의 녹화에 따른 엽록소 형광 변화

박강은(Kang-Eun Park),정화숙(Hwa-Sook Chung) 한국생물공학회 1997 KSBB Journal Vol.12 No.1

초파리의 한살이 단원에 대한 발견식 관찰 수업과 설명식 관찰 수업이 초등학생의 학습 흥미도에 미치는 영향

박강은(Kang Eun Park),김덕구(Deog Gu Kim) 한국초등과학교육학회 2002 초등과학교육 Vol.21 No.1

This paper aims to compare the effects of two teaching methods, the discovery-observational(DO) and the expository-observational(EO) instructions, on students learning interest in the life cycle of fruit fly. The subjects, 463 third-graders from two elementary schools in Changwon City, were divided into two groups, the DO group and the EO group. After the instruction on the life of the flies in two different teaching ways, a questionnaire with 13 items was devised regarding the students` interest, and the subjects were asked to respond to it. The results reveal that the general mean score of the DO group is higher than that of the EO group. Also, the DO group obtains the higher mean score in each item, except two items about knowledge learning. The differences of the mean scores of the two types, general as well as item-individual, between the two groups are statistically significant. This suggests that the class about the life cycle of living creatures easily getatable and observable, such as fruit flies, should be student-centered investigatory one, where students themselves collect them and observe the process of their growth and whole cycle.

연구논문 : Sulfite 가 보리 ( Horedum vulgare L . ) 유식물의 녹화에 미치는 영향

박강은(Kang Eun Park),정화숙(Hwa Sook Chung),송승달(Seung Dal Song),노광수(Kwang Soo Roh),송종석(Jong Suk Song) 한국환경과학회 1998 한국환경과학회지 Vol.7 No.2

시금치 ( Spinacia oleracea L. ) 엽록체의 광합성 전자전달 활성에 미치는 ios - Butanol 의 영향

박강은(Kang Eun Park),정화숙(Hwa Sook Chung) 한국식물학회 1992 Journal of Plant Biology Vol.35 No.3

N/A

초등예비 교사의 실험 수업 전, 후 생물 관찰에 대한 선호도 분석

박강은 ( Kang Eun Park ) 한국초등과학교육학회 2016 초등과학교육 Vol.35 No.2

The purpose of this study was to analyze pre-school teachers`` observation experience and their pre and post degrees of preferences in observing underground and water living things, fungus, insects, flowerless plants and sea lives. Based on the analysis, their pre-observation experience in living things were insects, ocean creatures, underground living things, flowerless plants, fungus and water living things in order. The degree of preferences in flowerless plans based on their gender, the female pre-service teachers showed higher scores than the average in both pre and post test. The male, however, responded higher scores in underground living things in both tests. Their background such as liberal arts or science or arts and physical major affected their preferences scores in water living things, insects and flowerless plans in the post test, and the science major pre-service teachers showed the highest degree of preferences in insects among the liberal arts, science or arts and physical major pre-teachers in the post test. In conclusion, there were different degree of their preferences affected by the pre observation experience, gender difference, their present majors such as the liberal arts, science or arts and physical major, the categories of living things but not in their high school background such as liberal arts or science.

열 현상에 대한 초등학생들의 개념 분석

강은주(Eun-Ju KANG),박종호(Jong-Ho PARK),백남권(Nam-Gwon BACK),박강은(Kang-Eun PARK),조태호(Tae-Ho JO) 한국수산해양교육학회 2019 수산해양교육연구 Vol.31 No.6

The subjects of the study were 67 students in the fourth grade who did not learn the conception of heat through the regular curriculum. The conception of heat insulation, heat transfer, and thermal equilibrium were investigated through a questionnaire. The conceptual types of elementary students were influenced by everyday experience and various types existed. While the conception of heat transfer in liquid - solid is high in conception understanding level, the conception understanding level of thermal equilibrium is lowest. Correlation between the conceptions showed that heat transfer in the solid was significantly correlated with the adiabatic and thermal equilibrium concept. It is expected that students will be able to extend the conception of heat in everyday life to a scientific concept if the understanding of heat transfer in various situations is preceded by formal education.

TIB 로 처리된 시금치의 엽록체에서 산소발생계의 공재활성화

정화숙(Jwa Sook Chung),박강은(Kang Eun Park) 한국식물학회 1993 Journal of Plant Biology Vol.36 No.3

In Tris-iso-butanol (TIB; Tris buffer pH 8.8 and 1% iso-butanol)-treated chloroplasts, oxygen evolving activity was more inhibited than Tris-treated chloroplasts, but restored highly by 2,6-dichlorophenol-indophenol (DCPIP) and photoreactivation. To understand the mechanism of this result of TIB in photosynthetic electron transport system, oxygen consumption and evolution of PS Ⅰ and PS Ⅱ were measured and protein of the chloroplasts was analysed. In Tris- and TIB-treated chloroplasts, oxygen evolving activity was increased according to the light intensity. Under 48 W·m^-2 light intensity, the oxygen evolving activity in both chloroplasts were similar but as the light intensity was increased, TIB-treated chloroplasts showed higher activity. Under 240 W·m^-2 light internsity, TIB-treated chloroplasts showed about 25% higher oxygen evolving activity than Tris-treated chloroplasts. Oxygen evolving activity was increased after photoreactivation in both Tris-treated and TIB-treated chloroplasts. Addition of NH_4Cl increased the activity in both chloroplasts but in TIB-treated chloroplasts the increase was 30% higher than that in Tris-treated chloroplasts. In PS Ⅰ, oxygen evolving activity was not inhibited by both treatments whereas in PS Ⅱ, significant difference was observed between two treatements. Addition of Mn^2+ and Ca^2+ enhanced oxygen evolution in both Tris- and TIB-treated chloroplasts. Though enhancement was higher in TIB-treated chloroplasts. No difference was observed in protein analysis of the two thylakoid membrane.