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      • KCI등재
      • KCI등재

        Growth Response and Arsenic Uptake of White Clover (Trifolium repens) and Evening Primrose (Oenothera odorata) Colonized with Arbuscular Mycorrhizal Fungi in Arsenic-Contaminated Soil

        김대연,이윤정,이정균,구남인,김정규 한국환경농학회 2008 한국환경농학회지 Vol.27 No.1

        A greenhouse experiment was conducted to investigate the role of the arbuscular mycorrhizal (AM) fungus, Glomus mosseae (BEG 107) in enhancing growth and arsenic (As) and phosphorus (P) uptake of white clover (Trifolium repens) and evening primrose (Oenothera odorata) in soil collected from a gold mine having concentrations of 381.6 mg total As kg-1 and 20.5 mg available As kg-1. Trifolium repens and O. odorata are widely distributed on abandoned metalliferous mines in Korea. The percent root colonization by the AM fungus was 55.9 % and 62.3 % in T. repens and O. odorata, respectively, whereas no root colonization was detected in control plants grown in a sterile medium. The shoot dry weight of T. repens and O. odorata was increased by 323 and 117 % in the AM plants compared to non-mycorrhizal (NAM) plants, respectively. The root dry weight increased up to 24 % in T. repens and 70% in O. odorata following AM colonization compared to control plants. Mycorrhizal colonization increased the accumulation of As in the root tissues of T. repens and O. odorata by 99.7 and 91.7 % compared to the NAM plants, respectively. The total uptake of P following AM colonization increased by 50% in T. repens and 70 % in O. odorata, whereas the P concentration was higher in NAM plants than in the AM plants. Colonization with AM fungi increased the As resistance of the host plants to As toxicity by augmenting the yield of dry matter and increasing the total P uptake. Hence, the application of an AM fungus can effectively improve the phytoremediation capability of T. repens and O. odorata in As-contaminated soil.

      • KCI등재
      • 만삭아에 발생한 괴사성 장염

        김대연,김성철,김경모,김애란,김기수,피수영,김인구,Kim, Dae-Yeon,Kim, Seong-Chul,Kim, Kyung-Mo,Kim, Ellen Ai-Rhan,Kim, Ki-Soo,Pi, Soo-Young,Kim, In-Koo 대한소아외과학회 2003 소아외과 Vol.9 No.1

        Necrotizing Enterocolitis (NEC) is usually a disease of premature infants, but occasionally it affects the term neonate. Twenty-five infants with NEC were treated at Asan Medical Center between January 2000 and December 2002, and 13 of them were term infants. In each case, the diagnosis of NEC was established by a clinical illness fulfilling the Bell's stage II or III NEC as modified by Walsh or by surgical findings. There were six males and seven females. The birth weight was from 1,960 to 3,700 g. The age at diagnosis was from 1 to 40 days. Four patients had congenital heart disease: one of who had hypothyroidism and cleft palate. Abdominal distension was present in all, and bloody stools in four. One patient had history of hypoglycemia, three had Rota viral infection. Eight patients had leucopoenia (<$5.0{\times}10^9/L$), seven had thrombocytopenia (<$100{\times}10^9/L$), and three severe thrombocytopenia (<$50{\times}10^9/L$). Laparotomy was required in 10 of the 13 patients. Indications for operation in the acute phase were failure to respond to aggressive medical therapy in five, and perforation in three patients. There were two late phase operations for intestinal stricture and fistula. There were no operative complications. Ten of thirteen patients survived (76.9%). Two patients died of septic complication. There was a delayed death due to heart failure. There was a significant difference in survival according to platelet count ($50{\times}10^9/L$) (p<0.05). Congenital heart disease and Rota viral infection are associated with NEC in term infants and thrombocytopenia and leucopoenia may be surgical indications.

      • KCI등재

        기업경영에 있어서 시민운동형 주주의 역할과 그 한계

        김대연 한국기업법학회 2005 企業法硏究 Vol.19 No.2

        This paper aims to describe the NGO style shareholder's role and the limit in business management. Today, social responsibility of enterprises that should consider profit of worker, consumer, local resident as well as shareholder's profit in large corporations is emphasized. NGO style shareholder says person who state opinion actively through exercise of shareholder's right after company's worker or local resident acquires more than one share. There is fare persuasive power at point that several contents that NGO style shareholder insists as exercise of shareholder's right realize social responsibility of enterprises and overcome limit of capital majority. But it is difficult that their insistence accommodates in case of is gone forward to direction that realize only oneself thought or opinion without amounting to profit of corporation or most shareholder. Finally, NGO style shareholder or institutional invest can achieve positive role more if is gone forward to that is not only oneself profit or insistence but heightens lucency of business management and realize social responsibility of enterprises.

      • KCI등재

        규제의 역설: 단말기유통법 형성 및 시행과정 분석

        김대연 한국정책분석평가학회 2017 政策分析評價學會報 Vol.27 No.4

        시장에서 발생하는 부작용인 기업의 독과점, 가격담합 등의 불공정경쟁을 해소하기 위해, 정부는 시장에 대한 규제를 통해 시장질서의 확립 및 소비자의 권익을 보호할 수 있다. 하지만 규제의 형성과정에 있어 시장에 대한 정보가 부족하거나 이익집단의 포획현상이 발생하게 되는 경우 규제는 본래의 기능을 수행하지 못하고 오히려 공정경쟁구조를 저해하거나 소비자의 권익을 침해할 여지가 있다. 2014년 10월 시행된 단말기유통법은 통신시장의 유통구조 개선 및 이용자의 권익보호를 위해 정부부처가 주도하여 형성한 법률이다. 하지만 본래의 취지와는 다르게 이동통신사 및 제조사 간 자유경쟁을 저해하고 소비자의 후생에는 더욱 부정적인 영향을 미쳤으며, 시행 3년차까지 24건에 달하는 개정안이 발의되는 등 사회적 혼란을 발생시켜왔다. 따라서 본 연구는 단말기유통법의 형성과정 및 시행 이후의 사회적 영향을 살펴보고자 우선 정책형성과정을 3시기로 구분하여 각 시기별 주요 이슈 및 행위자 간 관계에 대해 분석을 시도하였으며, 형성과정에서 발생한 주요 행위자의 영향력과 현재 계류 중인 개정안의 내용 간 관계, 그리고 시행 당시부터 현재까지의 사회적 영향력을 파악하였다. 분석결과, 단말기유통법 형성과정에서 특정 행위자의 포획현상이 발생하였고, 이로 인해 수정된 법률이 시행됨에 따라, 규제의 본래 목적이 제대로 달성되지 않은 규제의 역설 현상이 나타났음을 확인하였다. To resolving unfair competition such as monopolies and price cartels in the market, the government can establish market order and protect the rights and interests of consumers through the regulation of markets. In the process of regulatory formation, however, a lack of information or the capture of interest groups may occur, which might hinder a fair competition structure or infringe rights and interests of the consumers. The Act of Mobile Device Distribution Improvement enacted in October 2014, led by regulatory bodies, its goal was to improve a distribution structure of the mobile market and to protect rights of consumers. However, unlike the intention, it undermined free competition of mobile handset actors, negatively affected the welfare of consumers, and brought about 24 revised bills to the third year of implementation. Therefore, the purpose of this study is to analyze the formation process of the Mobile Device Distribution Improvement Act, and its effects on society after implementation. First of all, to find the relations between issues and actors, I classified the policy formation process into three periods. Then, I have identified the influence of major actors in each period, the relationship between the contents of current pending amendments and the social influence from the time of enforcement to the present. As a result of analysis, it was concluded that the intention of law had not been achieved properly because of the specific actor captured government agencies to blocked the enforcement of institution of separation subsidy, that is to say, the paradox of regulation is occurred.

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