忠南地域 農産物의 流通構造 改善方案

權容大 忠南大學校 地域開發硏究所 1990 地域開發論叢 Vol.2 No.-

Magnesium vs. machined surfaced titanium - osteoblast and osteoclast differentiation

권용대,이덕원,홍성옥 대한치과보철학회 2014 The Journal of Advanced Prosthodontics Vol.6 No.3

PURPOSE. This study focused on in vitro cell differentiation and surface characteristics in a magnesium coated titanium surface implanted on using a plasma ion source. MATERIALS AND METHODS. 40 commercially made pure titanium discs were prepared to produce Ti oxide machined surface (M) and Mg-incorporated Ti oxide machined surface (MM). Surface properties were analyzed using a scanning electron microscopy (SEM). On each surface, alkaline phosphatase (ALP) activity, alizarin red S staining for mineralization of MC3T3-E1 cells, and quantitative analysis of osteoblastic gene expression, were evaluated. Actin ring formation assay and gene expression analysis of TRAP and GAPDH performing RT-PCR were performed to characterize osteoclast differentiation on mouse bone marrow-derived macrophages (BMMs). RESULTS. MM showed similar surface morphology and surface roughness with M, but was slightly smoother after ion implantation at the micron scale. M was more hydrophobic than MM. No significant difference between surfaces on ALP activity at 7 and 14 days were observed. Real-time PCR analyses showed similar levels of mRNA expression of the osteoblast phenotype genes; osteopontin (OPN), osteocalcin (OCN), bone sialoprotein (BSP), and collagen 1 (Col 1) in cell grown on MM at 7, 14 and 21 days. Alizarin red S staining at 21 days showed no significant difference. BMMs differentiation increased in M and MM. Actin ring formation assay and gene expression analysis of TRAP showed osteoclast differentiation to be more active on MM. CONCLUSION. Both M and MM have a good effect on osteoblastic cell differentiation, but MM may speed the bone remodeling process by activating on osteoclast differentiation.

Ghost Surgeries Must Be Eradicated

권용대 대한성형외과학회 2016 Archives of Plastic Surgery Vol.43 No.4

농촌마을 종합개발사업과 농업계 대학의 역할

권용대,김대식,김태철 한국농공학회 2004 韓國農工學會誌 : 전원과 자원 Vol.46 No.3

親環境 쌀農業體系로의 轉換과 食糧需給政策의 調整問題

권용대 충남대학교 농업과학연구소 2001 농업과학연구 Vol.28 No.1

This study was conducted to investigate the effects of environmental sound rice f m n g method on the productivity of rice industry which may result in impacts on the staple food securities. Recently farmers have been concerned about adopting new rice cultivation method such as organic and low input farming system in which fertilizer and pesticide can be substantially reduced so as to alleviate the burden of agro-ecosystem. However, It has been argued about whether or not there are negative impacts on the self sufficiency rate of food, income of farm household and technological adaptability Therefore this study examined the productivity trend of environmental rice farming system and predicted the long term rice self-sufficiency rate when environmental rice farming system are adopted by assuming various scenarios. It was estimated that rice self-sufficiency rate can be decreased up to 522% by 2010. Based on the analysis of results, policy recommendations for environmentally sound rice farming were suggested as follows' 1) gradual adopting and transferring of environmental rice cultivation method. 2) increasing profitability of rice growing farmers 3) developing the fm level technology specific to Korean faming condition. 4) institutionalization of direct payments for encouraging environmental rice farming.

郡單位地域의 産業機能分析과 圈域別 開發方向 : 忠南禮山郡을 中心으로 Case Study of Yesan-Kun Area

權容大 충남대학교 농업과학연구소 1992 농업과학연구 Vol.19 No.1

Purpose of this study is to classify the main industrial function by region using the factor analysis. Identified regions, Yesan-Kun area consisted of 12 Myon(towns) selected as a case study, would be conducive to establishing rural town planning reflecting their industrial characteristics. Major findings are summarized as follows. First, population of Yesan-Kun has been decreased at about 1.0% annually for the period 1970∼1990, which may not meet the basic condition of sustainable regional growth. Second, economy of Yesan area, which mainly has been dependent upon the agriculture, are lagged behind because of lack of specialized manufacturing sector. Third, particularly West and East part of the region has been underdeveloped in spite of their potentiality mainly due to insufficient network of road. Based on fator analysis which classify the zones by the characteristics of industry, following developmental directions are suggested. - Yesan-Eup with a factor score of 2.85 in secondary and tertiary industry, which means functioning as a rural center should be developed to provide the residential people with basic service. - Ducksan-Myon with 2.93 factor score in tour industry is recommended to formulate leisure complex by utilizing its abundant tour resources. - Sapkyo-Eup, Goduck-Myon, Sinam-Myon, Oga-Myon Areas functioning as agricultural industry, are suggested to foster as zones specialized for the cultivation of crops and fruits. - Kwangsi-Myon and Bongsan-Myon neighboring other counties is likely to be affected by other regions' economy. These regions should be developed in association with other regions' economic circumstances. - Daeheung-Myon, Daesool-Myon and Sinyang-Myon areas, which are located southern part of Yesan County, is examined to be relatively underdeveloped area. So there are needs to make a special planning for the balanced growth of these regions.

저투입 농업의 환경경제적 평가방법론에 관한 소고

권용대 충남대학교 농업과학연구소 1999 농업과학연구 Vol.26 No.1

This paper reviews some methods on evaluating the impacts of low input farming on profitability, environments and human health. Measuring diverse effects of low input farming on the environmental economic aspects of agriculture poses a challenge because of difficulty in placing the objective value judgement on those impacts. This Study attempts to identify the individual attributes of low input agriculture and to examine the method of consturcting a simple index after assessing its marketed or non-marketed values in numerical terms. Validity of integrating socio-economic value of low input agriculture, which might be measured by multiple criteria approach, into a single index can be criticized. However, it might be meaningful in that this study suggest the guidance for how to assess the environmental and economic value of low input agriculture by single criteria and the possibility of overcoming the controversial subjectivity in weighing the different impact criteria.

충남 화훼산업의 현황과 발전방향

권용대 충남대학교 농업과학연구소 2002 농업과학연구 Vol.29 No.1

Rank of Chungnam's flower industry in Korea is sixth in the number of lower farming household and fifth in the flower cultivating land size in 2000. However, based on the SWOT analysis of Chungnam's agro-environmental factors influencing flower growing, it is noted that further shift of the regional flower industry up to 2nd highest rank nationally can be demonstrated. Strategies for achieving such targets are suggested as follows ; 1) specializing in flower varieties with regional comparative advantage, such as orchids, lily and rose, (2) establishing the educational system for farmers to manage the risks of market price fluctuation, flower cultivation and agricultural finance properly, 3) enlarging the investments in R&D and research facilities 4) assigning the efficient function and communication among the local government, farmers and agricultural marketeers so as to increase th flower exportation.

안면도 국제 꽃박람회와 지역 화훼산업의 발전방안

권용대 충남대학교 농업과학연구소 2001 농업과학연구 Vol.28 No.2

There have been various flower exhibitions in many countries such as Netherlands, Japan and China so as to encourage the growth of flower industry since they recognize the value of flower as cultural goods. Chungnam Province government, also endeavoring to make the regional flower industry into high valued agriculture and exporting industry, plans to open the international flower exhibition in Anmyon-Do from April 26th, 2002. This flower show, first held by local government and featuring mega-event tourism, is expected to contribute to initiating flower industry and related business in Chungnam region. However, the flower exhibition may not be said to succeed if it does not play enough to trigger the role in expanding its effect on post growth of regional flower industry. This paper aimed at suggesting strategies of maintaining festival boom of post Anmyon-Do flower fair and contributing to take off of flower agriculture and its related industry as follows; 1) inviting various flower business activities into exhibition places 2) establishing flower village town attracted by tourists 3) devising the flower R&D center 4) organizing helping center for infant flower business group.

중국 채소산업의 경쟁력 분석

권용대,신용길 충남대학교 농업과학연구소 2005 농업과학연구 Vol.32 No.2

This study is to provide a comprehensive overview of the changing vegetable sector of Chinese agriculture and to analyse the competitiveness of Chinese vegetable production. China now produces more than 60% of the world's vegetable supply and that 150 million people are engaged in vegetable production, processing and marketing since the reform of vegetable industry structure started in the late 1980s. As a labour abundant industry, China also features more comparative advantages in the vegetable trade. Although China's vegetable exports still accounts for only 1% of total production, the 5 million tons of export in 2003 makes China one of the largest vegetable players in the international markets. When estimating competitiveness of China's vegetable industry, China's producers' prices for vegetables are founded to be only from 10%~40% of what they are in Korea, while most of China's vegetables have also strong competitiveness in quality. As China joined the WTO in 2001 and expects to increase market share in vegetable trade, the development strategy for Korea's vegetable industry are suggested as follows: 1) focusing on the technology for the growth of vegetable productivity, 2) developing the higher value added vegetable industry through processing, 3) expanding the exported area and leading vegetable varieties.