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Gerbera(Gerbera hybrida Hort)의 형태적 특징과 유전적 유연관계 분석
김현애,임현희,양원진,이재헌,이병영,이용문,권오창 동아대학교 농업생명과학연구소 2001 農業生命資援硏究 Vol.10 No.1
This study was conducted to analyze the morphological characteristics and genetic relationships among 24 species of Gerbera. Most of flower colors were pink. The numerical order of flower color was pink, orange, red, double-colored, and milk-white. Majority of flower types were single or semidouble flowers. A few species were double flowers. Flower diameters were from 7cm to 12cm, showed significant differences compared to other characteristics. Flower stalks were ranged from 55cm to 65cm. Only one species was the shortest as 55cm. The others were similar size as about 65cm. Main annual production yields were between 190 and 400 blossoms. Fifty seven reproducible polymorphic bands from eighty primers were used for analyses of genetic similarity. The genetic similarity of 24 collected Gerberas was largely classified into five groups. The average similarity coefficient was 0.72 ranged from 0.50 to 0.90. The highest similarity coefficient was shown between 'Sardana' with red/white flower color and double flower type, and 'Tamara' with orange flower color and double flower type as 0.90.
Variation of Univariate Flow Karyotypes and Chromosomal DNA Contents in Maize (Zea mays L.)
Jai-Heon Lee,Myoung Hoon Lee,Kyung Je Kim 韓國作物學會 1998 Korean journal of crop science Vol.43 No.2
Analyses of now karyotypes using different maize (Zea mays L.) inbred lines have been performed. The accumulation and isolation of high quality and quantity metaphase chromosomes from root tips can be achieved from many kinds of maize lines. The chromosome suspensions were prepared by a simple slicing method from synchronized maize root tips and analyzed with a now cytometry. The variations of experimental now karyotypes were detected among inbred lines in terms of the positions and/or the numbers of chromosome peaks. The 2C DNA amount among 8 inbred lines ranged from 5.09 to 5.52 pg. The variability of DNA content in maize chromosome 1 was 9.1 % ranging from 0.685 to 0.747 pg. The selection of appropriate maize lines is critical for sorting specific single chromosome types. At least five different chromosome types can be discriminated and sorted from five maize lines.
국내 물류 운송 산업의 총 요소 생산성 및 영향 요인 분석
임재헌(JAI-Heon Leem),정윤세(Yoon-Say Jeong) 한국통상정보학회 2020 통상정보연구 Vol.22 No.4
무역 의존도가 높은 우리나라에서 물류 및 운송 산업은 수출 상품의 가격 경쟁력을 좌우하는 핵심 산업이지만 선진 경쟁국들과 규모와 역량을 비교할 때 상대적으로 뒤쳐져 있는 것으로 나타나고 있다. 본 연구에서는 국내 운송업을 대상으로 연도별 생산성 변화와 영향 요인들의 기여도를 분석하였다. 그 결과 첫째 국내운송업에서 기술 개발과 혁신에 의한 생산성 향상이 낮게 나타나 새로운 기술 적용을 통한 효율성 향상과 노동 중심의 산업에서 자본 중심으로의 산업 구조 전환이 필요하다는 것을 분석 하였다. 둘째 창고 및 운송서비스업은 자본, 노동의 생산 요소 투입이 증가하고 있어 이로 인한 생산성 향상과 성장이 기대되고, 셋째 수상운송업은 산업 자체의 지속과 성장이 한계에 달한 것으로 나타나 우리나라의 무역 경쟁력을 유지하기 위해서는 해운 물류 부문에서 개별 기업 차원이 아닌 국가 차원에서 산업 전반에 대한 성장 대책과 조정이 필요하다는 시사점을 도출 하였다. In Korea, which is highly dependent on trade, the logistics and transportation industry is a key industry that determines the price competitiveness of exported products, but it is shown to be relatively lagging when compared with advanced competitors in size and capacity. In this study, the contribution of yearly productivity changes and influencing factors were analyzed for the domestic transportation industry. As a result, first, it was analyzed that productivity improvement through technology development and innovation was low in the domestic transportation industry, and thus it was necessary to improve efficiency through the application of new technologies and to transform the industrial structure from labor-oriented industries to capital-oriented industries. Second, the warehousing and transportation service industry is expected to increase productivity and growth due to the increasing input of capital and labor factors. In order to do so, we derived implications that growth measures and adjustments for the entire industry are needed at the national level, not at the individual company level in the shipping and logistics sector.
Variation of Univariate Flow Karyotypes and Chromosomal DNA Contents in Maize (Zea mays L.)
Lee, Jai-Heon,Lee, Myoung-Hoon,Kim, Kyung-Je The Korean Society of Crop Science 1998 Korean journal of crop science Vol.43 No.2
Analyses of now karyotypes using different maize (Zea mays L.) inbred lines have been performed. The accumulation and isolation of high quality and quantity metaphase chromosomes from root tips can be achieved from many kinds of maize lines. The chromosome suspensions were prepared by a simple slicing method from synchronized maize root tips and analyzed with a now cytometry. The variations of experimental now karyotypes were detected among inbred lines in terms of the positions and/or the numbers of chromosome peaks. The 2C DNA amount among 8 inbred lines ranged from 5.09 to 5.52 pg. The variability of DNA content in maize chromosome 1 was 9.1 % ranging from 0.685 to 0.747 pg. The selection of appropriate maize lines is critical for sorting specific single chromosome types. At least five different chromosome types can be discriminated and sorted from five maize lines.
DEA를 이용한 공공정보 IT 서비스 기업의 경영효율성 분석
임재헌(Jai-Heon Leem),박현희(Hyun-Hee Park),정윤세(Yoon-Say Jeong) 한국무역연구원 2018 무역연구 Vol.14 No.3
Since 2013, the Korea has revised the Software Industry Promotion Act, limiting the participation of enterprises with limited cross-shareholding, which are notified by the Fair Trade Commission, to the public information industry. The purpose of this law is to prevent the market monopoly of large companies, to foster small and medium-sized software companies and to improve their technological capabilities. However, without considering the nature of SW industry and companies, It is pointed out that the profitability of small and medium-sized software companies is lowered. In this study, 22 IT service companies belonging to the cross-share limited business group and 48 general companies performing business in the public information industry based on the DEA model were enacted in 2013, Technological efficiency, Pure technological efficiency and Scale efficiency and after conducting the ANOVA test, the least significant difference test was conducted to determine whether the difference in efficiency of each group was significant. As a result, after 2013, when the law was enacted, the Technological efficiency of the general enterprise was still falling, unlike the purpose of the law and the reason is that the technology level and proficiency level of the general companies are lower than that of the large companies.