• Title/Summary/Keyword: chemistry education

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A Study on the Feature of Chemistry Education Through Analyzing into the Chemistry Textbooks Published in the Enlightenment Period in Korea (개화기 화학교과서의 분석을 통한 화학교육의 특성 연구)

  • Park, Jong-Seok
    • Journal of the Korean Chemical Society
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    • v.48 no.4
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    • pp.427-435
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    • 2004

  • Characteristics of chemistry education during the enlightenment period in Korea are examined by analyzing chemistry textbooks used in the period. Specifically, the analysis is made from the aspects of science, students and teachers. As a result it is found that; first, scientific knowledge itself is emphasized, contrary to those described in the curriculum of chemistry used in the period, and it consists of introduction, non-metals, metals and organic chemistry in chemistry textbook, second, the level of chemistry is similar with that in present high schools, and its technical constitution might have been difficult for a student to study with an experiment, third, terminology lacks consistency and some textbooks include contents of other subject. It is therefore believed that the chemistry textbooks of the enlightenment period is scientifically incomplete and would not have been easy for the teachers to use them to teach the students. In addition, considering the students as a beginner of modern sciences, study level could have been too difficult for them to follow. In conclusion, it appears that chemistry education during the enlightenment period in Korea was not so successful.

  • https://doi.org/10.5012/jkcs.2004.48.4.427 인용 PDF KSCI KPUBS HTML

First Year Undergraduate Students' Difficulties with Ball-and-stick Molecular Models

  • Chue, Shien;Kim, Chwee;Tan, Daniel
    • Journal of The Korean Association For Science Education
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    • v.27 no.6
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    • pp.477-487
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    • 2007

  • Previous studies show that students have difficulties in understanding and using molecular visualization tools. This study focuses on the ways in which first year chemistry undergraduates use ball-and-stick molecular models to explain the concept of addition reaction and the difficulties that they face using the models. Video recordings of interviews with undergraduates manipulating ball-and-stick models to solve problems related to reaction mechanisms are analysed to determine if they are able to elucidate their understanding with use of models. The results showed that students have difficulties with viewing the ball-and-stick models from the proper perspective and understanding the relationship between the various structures that they have created using the models. They also find the use of ball-and-stick models tedious and prefer drawing molecular structures on paper to explain their ideas. Implications for the teaching using ball-and-stick molecular models are discussed.

  • https://doi.org/10.14697/jkase.2007.27.6.477 인용 PDF KSCI

A Case Study of Chemistry Major Pre-service Teacher's Understanding about the Properties of Dilute Solutions and Perception on Teacher Education Curriculum (묽은 용액의 성질에 대한 화학전공 예비교사들의 이해 및 화학교사 양성교육에 대한 인식 사례 연구)

  • Lee, Song-Yeon;Kim, Soeng-Hye;Paik, Seoung-Hey
    • Journal of the Korean Chemical Society
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    • v.54 no.6
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    • pp.787-798
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    • 2010

  • We compared the understanding of 4 pre-service teachers of chemistry education major and 2 pre-service teachers of chemistry major related to conceptions of "properties of dilute solutions" chapter in high school Chemistry II textbooks. As results, few pre-service teachers understood fully the concepts of high school Chemistry II textbooks. Some pre-service teachers had misconceptions related to properties of dilute solutions. We found that few differences existed between the pre-service teachers' understanding regardless of whether they took a major in chemistry education of a education college or a major in chemistry of noneducation college. Most of the pre-service teachers who attended this research recognized the lack of practical knowledge in their pre-service teacher curriculum.

  • https://doi.org/10.5012/jkcs.2010.54.6.787 인용 PDF KSCI KPUBS HTML

Two New Diphenylethylenes from Arundina graminifolia and Their Cytotoxicity

  • Li, Yin-Ke;Zhou, Bin;Ye, Yan-Qing;Du, Gang;Niu, De-Yun;Meng, Chun-Yang;Gao, Xue-Mei;Hu, Qiu-Fen
    • Bulletin of the Korean Chemical Society
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    • v.34 no.11
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    • pp.3257-3260
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    • 2013

  • Two new diphenylethylenes, gramniphenols H and I (1 and 2), together with six known diphenylethylenes (3-8), were isolated from Arundina graminifolia. The structures of 1-8 were elucidated by spectroscopic methods including extensive 1D- and 2D-NMR techniques. Compounds 1 and 2 were evaluated for their cytotoxicity against five human tumor cell lines. Compound 1 showed cytotoxicity against PC3 cells with $IC_{50}$ value of 3.5 ${\mu}M$. Compound 2 showed cytotoxicity against NB4 and PC3 cells with $IC_{50}$ values of 3.6 and 3.8 ${\mu}M$, respectively.

  • https://doi.org/10.5012/bkcs.2013.34.11.3257 인용 PDF KSCI KPUBS HTML