http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 이규종 (검색결과 108 건)
- 무료
- 기관 내 무료
- 유료
-
Lead Accumulation and Distribution in Different Rice Cultivars
이규종,Yan Yong Feng,Doug-Hwan Choi,Byun-woo Lee 한국작물학회 2016 Journal of crop science and biotechnology Vol.19 No.4
This experiment was conducted to investigate the characteristics of lead (Pb) accumulation and distribution among rice organs in 35 rice cultivars of different genotypes. The 35 rice cultivars of four cultivar groups (temperate japonica, tropical japonica, tongil-type, and Indica) were grown with irrigation water containing 10 ppm throughout all growing seasons at the experimental farm of Seoul National University, Korea. Rice plants were sampled and analyzed for Pb accumulation and distribution in each rice organ at harvest. The results showed that Pb concentration, accumulation, and distribution in rice organs except roots were significantly different among 35 rice cultivars. Pb levels in different rice organs followed the order: root > shoot > grain. Grain Pb concentration and accumulation ranged from 0.05 to 0.22 mg kg -1 and from 0.016 to 0.127 mg m -2 , respectively. The lowest and highest grain Pb concentration and accumulation were observed in a temperate japonica cultivar ‘Hwajin’ and a tropical japonica cultivar ‘IR71204’, respectively. Grain Pb concentration showed highly significant correlations with the shoot-grain redistribution ratio among 35 cultivars. However, it was not correlated with shoot Pb concentration and accumulation, root Pb concentration, and the root-shoot translocation factor. Significant differences in Pb concentration, accumulation, and distribution in rice organs among four cultivar groups were only found in shoot Pb accumulation. Indica showed the highest Pb accumulation in shoots, while temperate japonica was the lowest. Grain Pb concentration for four cultivar groups was found to be significantly correlated with the shoot-grain redistribution ratio in common.
-
-
-
-
이규종,박병규,이태근,황연,김철진,최성철,Lee, K.J.,Park, B.K.,Lee, T.K.,Hwang, Y.,Kim, C.J.,Choi, S.C. 한국결정학회 2000 韓國結晶學會誌 Vol.11 No.1
Hydrothermal synthesis of find CeO₂ powder has been investigated. Synthesis was performed with Ce(NO₃)₃·6H₂O, in ethanol and water solution. Mineralizer were NH₄OH and KOH and reaction for the powder synthesis has performed at 130℃. The morphology of CeO₂ was nearly spherical in using NH₄OH and cubic form in KOH. Particle size increased with addition of NH₄OH. Ethanol solution was effective to reduced the agglomeration.
-
이규종,Lee, Gyu-Jong 한국방위산업진흥회 2003 國防과 技術 Vol.- No.291
실전에 배치될 미국의 차세대 지상발사 탄도미사일 방어시스템은 Lockheed Martin사가 주계약 업체로 개발 중인 미 육군의 THAAD(Theater High Altitude Area Defense) 시스템이 될 것으로 예상된다. 프로젝트 정의 및 위험감소 단계는 1995년에 시작되었으며, 체계개발 단계는 2003년 시작되고 이어서 2004년에는 발사시험이 실시될 예정이다. 그리고 연간 40기의 미사일을 생산하는 초도생산단계는 2006년경에, 최종적인 양산은 2008년부터 시작되어 연간 320기의 미사일을 생산할 계획이다. 1999년 8월에 실시된 발사시험에서 고도 100km 이상의 표적을 대기권 밖에서 요격하는 데 성공한 바있다.
-
-
李圭鍾 慶熙大學校 1991 論文集 Vol.20 No.-
It is arguable by this time if communication studies can be one of the independent social sciences. We can say that there is no evident border which distinguishes its field from that of closely related sciences. As W. Schramm said, in communication studies mainly the knowledge and methods of social sciences and mathematics have been adopted, and this is not a scholastic field but merely a field to study or problematic field. Therefore, communication studies are interrelated with other sciences, and the related problems are varied and accessed from various angles. Until today, the development of communication studies has been made through interdisciplinary approach by merging and cooperating with political science, sociology, psychology, and sociopsychology. Especially, the relationship between communication studies and political sciences is essential. In this modern society being called mass society, it has an important function in relation with democracy in the process of politics. Due to this matter, communication draws the concerns of many political science scholars who later on asserted the validity of communicative approach in the studies of political process and the analysis of modernization. Historically speaking, we cannot deny that political science had contributed to the development of the learning of communication. Nowadays, the science of communication is systematically in amid of confusion. This will, however, open the new chapter of research on this issue from the field of political science. This paper will study the of communication studied and its relationship with political science from the view of theories and of chronolgy. Furthermore, it discusses the outcome of communication studies and indicates the present trends which are making a tremendous development in the 1980s centered on the present situation of political communication. As communication studies were mainly done by American scholars in terms of its relationship with political science, American trends will mainly be discussed and, notwithstanding the importance of communication's institutional and systematic side, this paper will stress on its functional aspect.
-
-
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
