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연구논문 : STEAM 프로그램이 초등영재학생의 과학적 의사소통능력과 학습몰입에 미치는 영향
박애리나 ( Ae Ri Na Bak ),김용권 ( Yong Kwon Kim ) 한국초등과학교육학회 2014 초등과학교육 Vol.33 No.3
The purpose of this study is to find out the effect of STEAM program on the scientific communication skills and the learning flow of elementary gifted students. The main findings of this study are as follows: First, STEAM program that mathematical, technical, engineering and art factors were combined based on basic concepts of science were developed. Seconds, the change in the scientific communication skills of experimental group applying STEAM program had statistically meaningful difference (p<.05). Third, the flow of experimental class improved, but it had no meaningful difference statistically (p>.05). But it is expected that continuing level adjusted STEAM program might have positive effect on improving the flow with the following three reasons: 1) The gifted students` flow level on learning before experiment was rather too high to expect short term effect. 2) It was hard for them to achieve flow experience because topic difficulties and students` capacities were not balanced. 3) topic commitments and autotelic behaviors of gifted students were observed during classes. Fourth, by the result of the student satisfaction questionnaire survey on this program, students actively participated in the STEAM program with interest and curiosity. As achieved self-directed problem solving, versatile communication activities and success experiences, their class satisfaction was high. Based on such results, it was expected that the gifted class applied of STEAM program could enhance scientific communication capacity of the elementary gifted students and would further positively influence flow of learning as well. In addition, it was considered to have integrated approach value to elementary gifted and talented education in the aspect that it could satisfy various educational demands of gifted students.
털곰팡이(Phycomyces blakesleeanus)의 생장기간 중 파장별 단색광 조사에 따른 굴광성 반응과 포자낭병 발생간의 길항관계
이범규(Bumkyu Lee),박애리(Ae Ri Park),김혜정(Hye Jeong Kim),신동호(Dong Ho Shin),최관삼(Kwan Sam Choi) 충남대학교 농업과학연구소 2009 농업과학연구 Vol.36 No.1
털곰팡이 야생종(DEL)과 5균주의 돌연변이(A56, C9, C47, C111, G5)를 명소에서 6일간의 생장을 조사한 결과 생육일수에 따른 생 중량의 증가나 건물 중의 증가는 공시한 6균주가 동일한 경향을 보여 돌연변이 균주간의 차이는 인정할 수 없었다. 그러나 생중량과 건물중의 패턴 변화는 큰 차이를 보여 공시 균주 모두 배양 후 3일 이후부터는 건물 중의 증가는 뚜렷하지 않으나 생중량만은 계속 증가하였다. 이러한 사실은 배양 3일 이후에 형성되는 대형포자낭병의 발생과 굴광성이 건물생장에 의한 것이 아니라 오로지 수분유입팽창력 따른 편차생장 때문임을 강하게 시사하고 있다. 균주 간에서 보이는 파장별 굴광성의 감수성은 A56과 DEL, G5에서 가장 강하게 나타나 적색광의 파장역에서도 굴광성을 보이는 반면 C9 과 C47은 청색광 영역에서만 약한 감수성을 나타내었다. 그리고 C111은 전혀 굴광성을 나타내지 않았다. 이들 대형포자낭의 굴광성에 대한 광 감수성과 미소포자낭병의 발생 간에 어떤 길항적인 관계가 성립됨이 확인되었다. 즉 6균주 모두 대형포자낭의 굴광성이 청색광역에서 강하게 나타나다가 적색광역에선 그 반응이 감소되면서 미소포자낭병의 발생이 오히려 증가되었다. 이러한 결과로 미루어 볼 때 이들 대형포자낭의 발생 및 굴광성과 미소포자낭병의 발생 간에는 광파장의 인식인자(광수용체)가 하나의 공통적 기작에 의해 조절된다는 사실을 강하게 시사했다. Six strains of Phycomyces blakesleeanus (DEL, A56, C9, C47, C111, and G5) were cultured in continuous light condition for 6 days. The increase in fresh and dry weight after the culture period was similar in all strains. However, the increase in fresh weight was sustained throughout the culture period in all strains, whereas the increase in dry weight was prominent only during the first 3 days of culture. The development and phototropism of macrophores was observed after 3 days of culture, These results suggest that the development and phototropism is ascribed to the increase in turgor pressure in sporangiophores where water entered. A56 and G5 showed a higher sensitivity to light than C9 and C47, whereas C111 showed no photosensitivity. Antagonistic relations were observed between photosensitivity and development of microphores, suggesting that the development and phototropism of macrophores is regulated by a common recognition factor (photoreceptor).
병풍쌈의 에탄올 추출물의 항산화 기능 및 DNA의 산화적 손상 억제작용
김진철 ( Jin Chul Kim ),김종대 ( Jong Dai Kim ),박희준 ( Hee Juhn Park ),신인철 ( In Chul Shin ),이진하 ( Jin Ha Lee ),이현용 ( Hyeon Yong Lee ),한상화 ( Sang Hwa Han ),안주희 ( Ju Hee Ahn ),최근표 ( Geun Pyo Choi ),박애리 ( Ae Ri 한국응용생명화학회(구 한국농화학회) 2011 Journal of Applied Biological Chemistry (J. Appl. Vol.54 No.4
산나물의 일종인 병풍쌈[Cacalia firma Komar. (CFK)]은 산지에서는 인기 있는 자생식품 자원이다. 본 연구의 목적은 CFK의 ethanol (EtOH) 추출물의 1,1-diphenyl-2-picryl-hydrazyl, 2,2-azinobis(3-ethylbenozothiazoline-6-sulfonic acid) diammonium salt, ferric reducing/antioxidant power 분석법 및 electron spin resonance spectroscopy에 의한 유리기의 억제작용과 agarose electrophoresis법에 의한 산화적 DNA damage에 대한 보호효과를 조사하는 것이다. HO·유리기에 의한 CFK EtOH 추출물의 DNA damage 보호효과는 항산화 참고 물질로 epicatechin, ascorbic acid 및 trolox등과 비교하였다. CFK EtOH 추출물 중의 총 페놀물질 분석은 Folin-Ciocalteu의 방법으로 행하고 표준물질로 gallic acid equivalents를 사용하여 함량을 표시하였다. CFK EtOH 추출물 중의 총 페놀 함량은 잎 과 줄기 부분에서 각각 161.53±1.07 μg/g, 142.45±0.56 μg/g이 확인 되었다. CFK EtOH 추출물 중의 유리기들에 대한 항산화 기능과 HO·기에 의한 DNA 손상에 대한 보호효과는 각각 약 60% 이상의 기능을 보였다. The Korean edible mountainous vegetable, byeongpungssam, [Cacalia firma Komar. (CFK)] is a wild plant found in the intermountain areas in Korea. The aim of this study was to investigate its free radical scavenging activity using 1,1-diphenyl-2-picryl-hydrazyl (DPPH), 2,2-azinobis(3- ethylbenozothiazoline-6-sulfonic acid) diammonium salt (ABTS), ferric reducing/antioxidant power (FRAP) assays, an electron spin resonance spectroscopy (ESR). We also examined its protective effect against oxidative DNA damage using agarose electrophoresis of ethanol (EtOH) extract of CFK. The protective activity of the extract against the DNA damage induced by HO·radicals was compared to epicatechin, ascorbic acid (AsA) and trolox as reference antioxidant compounds. Total phenolic content in the extract was determined spectrometrically according to the Folin- Ciocalteu procedure and calculated as gallic acid equivalents (GAE). Total polyphenolic content of the extract was measured in the leaves (161.53±1.07 μg/g) and shoot (142.45±0.56 μg/g). The antioxidant potential of the extracts against some radicals and DNA damage by HO·radicals showed over 60%, respectively.