• 한국약용작물학회지
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• 제16권6호
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• pp.397-401
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• 2008

Changes in the contents of total phenolic compounds in as Agrimonia pilosa well as their antioxidant capacity according to the havest time and positions were examined. The contents of the total phenolic compounds were determined by extraction with MeOH. Among havest times harvestry in July showed highest contents of the total phenolic compounds and harvestry in May showed lowest contents of the phenolic compounds. Among the 4 positions (root, branch, leaf, flower) of Agrimonia pilosa the root contained highest contents of the phenolic compounds. The antioxidant capacities of Agrimonia pilosa were increased roughly with increasing level of contents of phenolic compounds according to positions.

• 한국과학교육학회지
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• 제8권2호
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• pp.53-56
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• 1988

The Korean Federation of Education Association has published "Vacation Life" to promote self-teaching of middle school students during the summer and winter vacation of middle school students every year. The book include whole subjecy offered in the middle school. However subject of science(Physics, chemistry, biology and earth science) is more emphasized. This article described brief summary of the contents of biology branch published in winter "Vacation Life", 1980 and summer "Vacation Life" 1981.

• 한국초등과학교육학회지:초등과학교육
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• 제22권1호
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• pp.97-108
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• 2003

The total 4,895 works presented at Science Fairs for the past 17 years(1986∼2002) are classified by subjects and participators, and the 1,277 works in biology section are analyzed by participators, contents, and object materials. The results are as follows: The proportion of exhibits according to sections was the most in Biology(26.1％). The social position of exhibitors and its proportion were 45.7% in students and 54.3% in teachers and popular people. The proportions of students' exhibits by the level of school were elementary school(68.3%). middle school(14.3%), and high school(17.4%). This indicates rapid decrease in the number of exhibits in middle and high schools. The proportion of students' exhibits(55.9%) is higher than that of teachers' exhibits(44.1％) in the section of Biology. In terms of contents, exhibits about Physiology and Ecology were the most(67.6%). The materials used in those exhibits and the proportion were Animalia(50.9%), Plantae(39.9％), Fungi(5.7%), Monera(1.8%), and Protista(1.7%). The proportion of taxa in plants studied in the exhibits were Dicotyledoneae(65.9％) and Monocotyledoneae(17.3％). The proportion of taxa In animals was Arthropoda(60.2％), Vertebrata(24.9%), and Mollusca(11.1％). The species used in those exhibits and its times were pine tree(11 times), dandelion(10 times), and butterfly(11 times).

• 한국잠사곤충학회지
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• 제49권2호
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• pp.43-46
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• 2007

잠분의 기능성 소재 이용의 기초자료로 활용하고자 일반 건조잠분에 대하여 용매별로 추출방법을 달리하여 얻은 열수, 에탄올, 메탄올 추출물에 대한 일반성분 및 무기질, 아미노산 성분을 분석하였다. 추출용매 별 일반성분 분석 비교 결과, 조단백질과 조회분은 MeOH > EtOH > 열수 추출물 순으로 함량이 높게 나타났으며, 조지방은 EtOH > MeOH > 열수 추출 순으로 함량의 차이를 보였다. 무기질 분석 결과 잠분채취 시기와 상관없이 중요 영양윈소인 K, Fe, Ca, Mg등의 함량이 높게 나와 잠분이 중요 무기질 공급원이 될 수 있음을 알 수 있었다. 아미노산 함량 분석 결과, 용매를 달리한 추출물에 대한 전체 아미노산의 정량치는 열수용매 추출물이 가장 높게 나타났고 EtOH와 MeOH용매 추출물에서는 아미노산 함량 값에 큰 차이를 볼 수 없었다. 18종 아미노산 중 채취시기와 상관없이 열수 추출물에서는 Glu와 Asp의 함량이 가장 높았으며 다음으로 Gly > Ala > Leu > Thr > Ser 등의 함량 순을 나타내었다. 채취시기를 달리한 잠분추출물의 경우 역시 2004년 채취 잠분이나 2007년 당해 채취 잠분에서의 아미노산 함량은 큰 차이 없어 채취시기와 잠분의 성분변화와는 크게 상관이 없음을 알 수 있었다.

• Journal of Ecology and Environment
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• 제35권4호
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• pp.351-358
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• 2012

To investigate the environmental adaptation and ecophysiological characteristics of Suaeda maritima and S. asparagoides under saline conditions, plant growth and density were analyzed according to environmental changes of habitats. The total ion content of soil decreased with time, which was caused by the predominance of exchangeable $Na^+$ and $Cl^-$ in the upper layers. The population of S. maritima was more densely distributed in the region with higher ion contents of $Cl^-$, $Mg^{2+}$, $K^+$ and $Na^+$ than the population of S. asparagoides. Both species were showed a decreased population density according to increases in plant growth. Under the conditions of a salt field, S. maritima and S. asparagoides contained high inorganic ions to maintain low water potential, but low water soluble carbohydrate contents. In the case of free amino acid, S. maritima showed an especially high proline content, and contained rather large amounts of free amino acids, whereas S. asparagoides did not. Both species showed high inorganic ion contents in the leaves, which might be a mechanism of avoiding the ionic toxicity by diluting the accumulated ionic concentration with a high ratio of water content to dry weight. This result suggests that S. maritima seems to adapt to saline conditions by accumulating proline in addition to inorganic ions. S. asparagoides seems to adapt by osmoregulation processes, using inorganic ions rather than free amino acids.

• 한국식품영양학회지
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• 제30권1호
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• pp.112-119
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• 2017

In this study, we investigated and compared some chemical properties of Korean natural honeys and sugar-fed honeys for their quality characteristics. The natural honey samples were monofloral from chestnut and acacia flowers, and the sugar-fed honey samples were collected from honeybees feeding on sugar cane and sugar beet. The chemical properties of the honey samples, such as moisture, total protein, total lipids, ash, carbohydrate, minerals, vitamins, and free amino acids were determined. The moisture content was $18.5{\pm}0.9%$ in natural acacia honey, $17.2{\pm}0.9%$ in natural chestnut honey, $19.6{\pm}0.9%$ in sugar cane-fed honey, and $24.8{\pm}%$ in sugar beet-fed honey. The total protein and ash contents were the highest in natural chestnut honey. Maltose and sucrose were not detected in natural honeys but were detected at 2~7% in sugar-fed honeys. The vitamin, mineral, and free amino acids contents of natural honeys were higher than sugar-fed honeys. The natural chestnut honey is the highest in honeys. These results confirmed that the quality of natural honey was better than that of sugar-fed honey. Also, the vitamin, mineral, and free amino acids contents are potential characteristics for distinguishing between natural and sugar-fed honeys.

• 한국콘텐츠학회논문지
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• 제10권5호
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• pp.427-435
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• 2010

교과서에 쓰인 과학 용어 네트워크를 구축하여, 네트워크의 구조, 관련 정보 및 연관 관계를 분석하기 위하여 핵심용어를 도출하였다. 본 연구에서는 과학, 생물1 및 생물2 교과서 각 과목별로 출판사 세 곳을 선정하고 각각의 교과서에서 추출한 용어들을 노드로, 한 문장 안에 있는 과학 용어를 링크로 연결하여 네트워크를 구축하였다. 모든 교과서의 과학 용어 네트워크는 척도 없는(scale-free) 네트워크의 특성을 보여주었다. 복잡한 (complex) 네트워크에서 가중치가 낮은 것부터 제거하는 방법인 k-core 알고리즘을 적용하여 핵심 (core) 네트워크를 구축하였는데, 몇 개의 모듈이 연결되는 형태를 보여주었다. 과학교과서의 경우에는 물리, 화학, 생물, 지구과학 분야별로 크게 네 개의 모듈을 형성하였고, 생물1과 생물2 교과서는 각단원별로 용어들이 모여 있는 특성을 지닌 네트워크를 나타냈다. 본 연구에서 복잡한 네트워크에서 핵심네트워크를 구축하여 유용한 정보를 도출할 수 있는 가능성을 제시하였다.

• 한국과학교육학회지
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• 제43권1호
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• pp.49-57
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• 2023

본 연구는 영국의 학교 생명과학 교육을 위한 왕립생물학회(RSB)의 생명과학 교육과정을 분석하고, 한국의 생명과학 교육에 대한 시사점을 살펴보고자 하였다. 영국 RSB 학교 생명과학 교육과정은 3개의 차원(생명과학의 실천, 생명과학의 개념 및 생명과학의 응용)과 7개의 대질문(big questions)으로 구성된다. 영국 RSB 학교 생명과학교육과정은 5-11세, 11-16세, 16-19세의 연령별로 구성되어 체계화되어 있었다. 생명과학의 실천 차원에서 영국 RSB 학교 생명과학 교육과정은 생명과학 활동이 다른 공동체와 연계, 증거 기반 토론 등을 통해 소통하고 공유되어야 한다고 강조한다. 영국 RSB 학교 생명과학 교육과정의 개념 차원은 5-7세, 7-11세, 11-14세, 14-16세, 16-19세의 학교 수준과 연령을 고려하여 내용을 구체적으로 체계화되어 있었다. 우리나라 국가교육과정 생명과학의 핵심 개념과 비교할 때, 영국 RSB 생명과학 교육과정은 인간의 건강, 생물학적 구조와 기능, 생물학적 성장과 재생산, 생물학적 공존 등의 내용 요소들은 상당한 차이를 보였다. 영국 RSB 학교 생명과학 교육과정의 응용 차원에서는 보건 및 환경복지 증진을 위한 응용 방법 개발, 생명과학 지식의 영향평가 및 응용 등 3가지 주제가 학교 수준이나 연령에 상관없이 모든 학생에게 공통적으로 적용되고 있었다. 영국 RSB 생명과학 교육과정의 내용 체계를 고려하여 볼 때, 우리나라 생명과학 교육과정의 내용 체계를 연령이나 학교 수준은 물론 차원과 대질문을 고려한 연계성 강화를 위한 재구성 방안 연구의 필요성을 시사한다.

• Animal cells and systems
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• 제6권4호
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• pp.335-339
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• 2002

Mouse T cells overexpressing the SRG3 protein displayed morphological changes; the cells were enlarged and their shapes were irregular compared to the normal parental cells. In addition, growth rate of the cells was dramatically reduced and their DNA contents were increased. The increased DNA contents were due to an increase in number of chromosomes in these cells. We have observed similar results in S. cerevisiae cells overex-pressing the yeast SWI3 protein. Yeast cells overexpressing SWI3 protein These results suggest that the SRG3/SWI3 protein plays an important role in cell growth and cell cycle progression.

• The Korean Journal of Ecology
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• 제6권4호
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• pp.21-28
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• 1983

The relationship of Paramecium bursaria with its symbiiotic Chlorella was studied in the view-point of photosynthesis and its product movement. The following results were obtained. In 1/10 dilution of bacterized medium green Paramecium grew and survived better than colorless Paramecium. P. bursaria was competitively related to its symbiotic algae as far as the change of total chlorophyll contents was concerned. Therefore, in continuous darkness total chlorophyll contents of green Paramecia decreased proportionally to the time course. Under the condition, on the other hand, that the bacterized medium was not replenished over 10 days, total chlorophyll contents in P. bursaria increased by over 2 times as much as those in normal condition. By means of Oxygen Diometer it was assured that green Paramecium was able to utilize thoitic the great part of oxygen evolved photosynthetically by its symbiotic algae. Also when was given many starch grains were found in symbiotic chlorella through electron micrography. These data suggested that P. bursaria was photosynthetically given lots of benifit by its symbiotic chlorella.