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조정일 ( Cho Jung-il ),조자용 ( Cho Ja-yong ) 한국유기농업학회 2003 韓國有機農業學會誌 Vol.11 No.4
This study was conducted to screen the antagonistic bacteria which inhibit the growth of plant pathogen, fusarium wilt(Fusarium oxysporum) occurred in tomato plants in greenhouse. We isolated an effective bacterial strains and investigated into the antifungal activity of the antagonistic microorganism and it’s identification. Ten bacterial strains which strongly inhibited Fusarium oxysporum were isolated from the nature, and the best antagonistic bacterial strain designated as KC175, was selected. The antagonistic strain KC175 was identified to be the genus Bacillus sp. based on the morphological and biochemical characterization. The Bacillus sp. KC175 showed 58.2% of antifungal activity against the growth of Fusarium oxysporum. By the bacterialization of the culture broth and the heat bacterialization culture filtrate of it, Bacillus sp. KC175 showed 91% and 18% of antifungal activity, respectively.
조정일(Jung-Il Cho),박성한(Sung-Han Park),이강섭(Gang-Seob Lee),김수민(Su-Min Kim),임수미(Su-Mi Lim),김연식(Youn-Shic Kim),박수철(Soo-Chul Park) 한국육종학회 2020 한국육종학회지 Vol.52 No.S
The global area of GM Crops continued to grow in 2018 and reached 191.7 million hectares. Twenty-six countries approved biotech crops for planting and an additional 44 countries (18 + 26 EU countries) officially imported biotech crops for food, feed, and processing, meaning that biotech crops are now commonly accepted in those countries. First-generation GM seed is being commercialized by global agricultural companies in advanced countries such as the United States and parts of Europe. The fact that more than 90% of first-generation GM seeds, which have been commercialized for 20 years, are both insect resistant and herbicide resistant proves that they continue to have an effect on improving agricultural productivity and increasing farmers incomes. As the effectiveness of GM crops has been proven and technology has been developed, the GM crop development trend has recently changed. In other words, it has moved from being producer-oriented to benefiting both farmers and consumers. In Korea, the National Program for GM Crops (NCGC), one of the Next-Generation BioGreen 21 Programs organized by Rural Development Administration (RDA), was established in 2011 to develop biotech crops that will be used in the future to solve our agricultural problems. To accomplish this mission, the NCGC carried out the exploration of useful functional genes, the development of qualified events, and the safety assessment of developed events. Here, we introduce the current status of GM crop development and commercialization in the world and in Korea.
조정은(Cho, Jung Eun),김상일(Kim, Sang Il) 한국국제회계학회 2013 국제회계연구 Vol.0 No.48
본 연구는 특수관계자 거래가 과잉투자에 미치는 영향에 대해 분석하였다. 또한 대규모 기업집단 소속 여부가 특수관계자 거래와 과잉투자 간의 관계에 어떠한 영향을 미치는지 분석하였다. 본 연구의 분석 결과를 요약하면 다음과 같다. 첫째, 특수관계자 거래규모가 커질수록 경영자의 과잉투자가 증가하고 있음이 검증되었다. 이는 외부 모니터링이 어려운 특수관계자 거래를 통하여 경영자가 사적이득을 얻기 위해 과잉투자를 한다는 것을 의미한다. 둘째, 대규모 기업집단에 소속된 기업에서 특수관계자 거래액과 과잉투자 측정치 간의 양(+)의 관련성이 더 큰 것으로 나타났다. 이는 대규모 기업집단에 소속된 기업이 그렇지 않은 기업에 비해 거래를 할 수 있는 특수관계자가 상대적으로 많고, 복잡한 지배구조로 인해 외부 투자자들의 모니터링이 어렵기 때문에 특수관계자 거래를 통해 과잉투자를 할 유인이 더 높다는 점을 시사한다. 본 연구는 경영자가 특수관계자 거래를 이용하여 과잉투자를 하는가를 실증분석 한다는 의의를 갖는다. 또한 특수관계자 거래와 관련된 공시제도 및 부당한 특수관계자 거래에 대한 규제의 보완점을 간접적으로 제시할 수 있다는 정책적 시사점을 제공한다. This study examines the impact of related party transactions on managers" over-investment behavior. It also analyzes how company characteristic, such as Chaebol groups, affects the relation between related party transactions and over-investment. We find following empirical results. First, increase in related party transaction amount results in increase in over-investment. Second, for companies that belong to chaebol groups, the relation between related party transactions and over-investment is significantly positive. This result suggests that since chaebol firms are involved in much more related party transactions than non-chaebol firms and are difficult to monitor for outside stakeholder due to their complex governance structure, chaebol firms are more inclined to engage in over-investment through related party transactions. This study performs empirical analysis to examine whether managers use related party transactions to involve in over-investment. It suggests that the current disclosure and regulation system of related party transactions needs to be supplemented.
생물 개념 이해의 평가 도구로서 개념도의 타당도 , 신뢰도 그리고 현실 적용 가능성에 대한 연구
조정일(Jung Il Cho),김정(Jung Kim) 한국과학교육학회 2002 한국과학교육학회지 Vol.22 No.2
The purpose of this study was to investigate the validity, reliability and practicality of a concept map as an assessment tool in the context of biology concept learning. Forty undergraduate students participated in concept mapping, and the maps were scored by preservice science teachers, using one of three different scoring methods, that is, concept map scoring methods developed by Burry-Stock, Novak & Gowin and McClure & Bell. Two scorers were assigned to each scoring method. As far as the validity of the assessment methods was concerned, two of the three methods were found to be very valid, while Burry-Stock`s scoring method was shown little valid. As far as the internal consistency of the methods was concerned, considerably high consistencies were shown between every pair of scorers, judging from high correlation coefficients between the pair of scorers for each scoring method. It took from 1.13 minutes to 3.70 minutes to assess a map at the average. It showed that concept mapping could be used in school classrooms with the limited resources of time and people. These findings suggest that the concept mapping can be an appropriate tool for assessing biology concept understandings.