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H : 소장처정보

T : 목차정보

Korean journal of crop science = 韓國作物學會誌 11건

  1. [국내논문]   Nitrogen Balance and Biological Nitrogen Fixation of Soybean in Soybean-Barley Cropping System  

    Park Sei Joon (National Institute of Crop Science, RDA ) , Kim Wook Han (National Institute of Crop Science, RDA ) , Lee Jae Eun (National Institute of Crop Science, RDA ) , Kwon Young Up (National Institute of Crop Science, RDA ) , Shin Jin Chul (National Institute of Crop Science, RDA ) , Ryu Yong Hwan (National Institute of Crop Science, RDA ) , Seong Rak Chun (Department of Crop Science, College of Life and Environmental Science, Korea University)
    Korean journal of crop science = 韓國作物學會誌 v.50 no.1 ,pp. 1 - 4 , 2005 , 0252-9777 ,

    초록

    This experiment was conducted to investigate the soil nitrogen credit of biological nitrogen fixation (BNF) and the nitrogen balance of soybean in soybean-barley cropping systems. Soybean cultivar, Shinpaldalkong2 and barley cultivar, Olbori, were used in soybean mono-cropping (SM), barley monocropping (BM), and barley­soybean double cropping system. The barley-soybean double cropping system was treated with two different levels of nitrogen fertilizers, 0 nitrogen fertilizer (BS-F0), and standard nitrogen fertilizer (BS-F1). Nitrogen and organic matter concentrations in soil of BS-F1 plot on October, 2001 were increased $4.8\%\;and\;5.9\%$ , respectively, compared with those on October, 2000. The ranges of BNF rate in soybean were $69.1\~ 88.2\%$ in two years, and the rate was the highest in BS-F0 plot and the lowest in SM plot. The ranges of nitrogen harvest index (NHI) in all treatments were $83.9\~86.7\%$ . The yield was 270 kg/10a in BS­F1 plot and 215 kg/10a in BS-F0 plot. However, the nitrogen balances were +0.6 kg/10a of gain of soil nitrogen in BS-F0 plot and -0.4 kg/10a of loss of soil nitrogen in BS-F1 plot. In comparisons of SM and BS-F1 plots, although the seed yields were similar in two plots, the loss of soil nitrogen was higher in SM than BS-F1 plot. Overall, our results suggest that barley-soybean double cropping system was more effective in respect to seed productivity and soil nitrogen conservation than soybean monocropping system, and the N credit to following crops by soybean cultivation was identified in soybean double cropping system.

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  2. [국내논문]   Relationship between Nodulating Characters and Yield Components in Supernodulating Soybean Mutants  

    Park Sei Joon (National Institute of Crop Science, RDA ) , Youn Jong Tag (National Institute of Crop Science, RDA ) , Kim Wook Han (National Institute of Crop Science, RDA ) , Lee Jae Eun (National Institute of Crop Science, RDA ) , Kwon Young Up (National Institute of Crop Science, RDA ) , Shin Jin Chul (National Institute of Crop Science, RDA ) , Seong Rak Chun (Department of Crop Science, College of Life and Environmental Science, Korea University)
    Korean journal of crop science = 韓國作物學會誌 v.50 no.1 ,pp. 5 - 10 , 2005 , 0252-9777 ,

    초록

    This experiment was conducted to clarify the functions of supernodulating characters on seed yield determination through the comparison of agricultural traits of supernodulating soybean mutants, Sakukei4, SS2-2, and their parent cultivars, Enrei and Shinpaldalkong2. The plant dry weights of supernodulating mutants, Sakukei4 and SS2-2, were $52\%$ and $61\%$ of their wild type parents at full seed stage (R6). However, the relative growth rate (RGR) from the pod set stage (R3) to R6 of Sakukei4 was 0.022 g/g/day and that of SS2-2 was 0.016 g/g/day, which were higher than those of their parents. Nodule number and dry weight were increased in two supernodulating mutants by the R6 stage. The nitrogen concentrations of leaf, petiole and stem of Sakukei4 were higher than those of Enrei. SS2-2 showed higher nitrogen concentration in petiole than Shinpaldalkong2 had. The positive correlations were appeared between nodule dry weight, plant dry weight and pod number, in two supernodulating mutants during the period from R3 to R6 stage. Although all of the yield components and seed yield were lower in two supernodulating mutants than their parents at the stage of full maturity (R8), the harvest index was higher in supernodulating mutants. The increasing rates of pod number to stem dry weight in two supernodulating mutants showed the higher than those of two their parents at R8 stage. In conclusion, the relative growth rates during the early to the middle reproductive growth period were higher in supernodulating mutants than the wild types. This could be resulted in an increase in pod number. The increase of relative growth rate was the result of the successive supplement of nitrogen source from biological nitrogen fixation (BNF) of nodules during the middle reproductive growth period in supernodulating mutants.

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  3. [국내논문]   Growth and Maturity in Response to Planting Times in Supernodulating Soybean Mutants  

    Park Sei Joon (National Institute of Crop Science, RDA ) , Youn Jong Tag (National Institute of Crop Science, RDA ) , Lee Jae Eun (National Institute of Crop Science, RDA ) , Kim Wook Han (National Institute of Crop Science, RDA ) , Kwon Young Up (National Institute of Crop Science, RDA ) , Shin Jin Chul (National Institute of Crop Science, RDA ) , Seong Rak Chun (Department of Crop Science, College of Life and Environmental Science, Korea University)
    Korean journal of crop science = 韓國作物學會誌 v.50 no.1 ,pp. 11 - 15 , 2005 , 0252-9777 ,

    초록

    This experiment was conducted to investigate the changes of growth and maturity and to clarify the function of supernodulating characters, excessive nodules and high biological nitrogen fixation rate (BNF), on maturity in response to different planting time in supernodulating soybean mutants. Two supernodulating soybean mutants, Sakukei4 and SS2-2, and their parent cultivars, Enrei and Shinpaldalkong2, were planted on May 24 and June 15, 2004. The degrees of the shortening of growth days by the planting time delay were 18 to 22 days in four cultivar, and there were no significant differences among the cultivars. However, four cultivars showed the different maturity properties. Sakukei4, mutated from Enrei, showed later maturity than that of Enrei, and 882-2, mutated from Shinpaldalkong2, showed earlier maturity than that of Shinpaldalkong2. The plant and nodule dry weights at R6 stage of Sakukei4 showed the smallest decrement and those of SS2-2 was showed the largest decrement by the delay of planting time. The photosynthetic rates of Sakukei4 during the late reproductive growth period were slowly decreased, however those of SS2-2 were steeply decreased in two planting time treatments. Overall, the growth of Sakukei4 was decreased slowly, however the growth of SS2-2 was decreased sharply according to the delay of planting time. The percentage of seed yield of Sakukei4 in June planting plot compared with May planting plot at R8 stage was $92\%$ , which was the lowest decreasing rate of yield among the cultivars, and in the case of SS2-2, it was in $76\%$ , the highest one. These results indicated that the responses of supernodulating mutants by the delay of planting time were very similar to the wild types. This means supernodulating characters in supernodulating soybean mutants might not affect to the maturity property. Additionally, the maturity property could be considered as an important characteristics to decide or to select on the developments of supernodulating soybean mutants, which have a low productivity by an excessive nodules, especially.

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  4. [국내논문]   Improvement of Nitrogen Efficiency by N Application at Early Tillering Stage in Direct-Seeded Rice   피인용횟수: 1

    Seo Jun-Han (Department of Agronomy, Seoul National University ) , Lee Ho-Jin (Department of Agronomy, Seoul National University ) , Lee Seung-Hun (Department of Agronomy, Seoul National University)
    Korean journal of crop science = 韓國作物學會誌 v.50 no.1 ,pp. 16 - 21 , 2005 , 0252-9777 ,

    초록

    This study was conducted to establish the elaborate nitrogen fertilization method to enhance N use efficiency in direct-seeded rice on flooded paddy. The nitrogen uptake by rice plants was insignificant until 25 days after seeding, and increased gradually thereafter. During this early growth stage, rice plants absorbed only the $4\%$ of basal applied N, while the $45\%$ of N fertilizer remained in the paddy soil. The absorption of basal N by rice plants was almost completed at 46 days after application. Nitrogen top-dressed at 5-leaf stage was well matched to crop nutrient demand, so it could be absorbed so actively in 8days after application. As a result, we could cut down the amount of N fertilizer to $36\%$ of the basal N level without significant difference in yield. Plant recoveries of fertilizer $^{15}N$ applied with different application timings were $7.8\%$ for basal, $9.4\%$ for 5-leaf stage, $17.1\%$ for tillering stage, and $23.4\%$ for panicle initiation stage, respectively. When urea was applied with nitrogen fertilization practice based on basal incorporation (BN), plant recovery of $^{15}N$ at harvest was $31.0\%$ , which was originated from $13.7\%$ for grain, and $21.3\%$ of the fertilizer $^{15}N$ remained in the soil, and the rest could be uncounted. Plant recovery of fertilizer $^{15}N$ applied with nitrogen fertilization practice based on topdressing at 5-leaf stage (TN), where N rate was reduced by $18\%$ compared with BN, was $35.1\%$ (grain $15.6\%$ ), and $19.9\%$ of the fertilizer $^{15}N$ remained in the soil, and the rest could be uncounted. TN showed a higher $^{15}N$ recovery than BN because it was to apply N fertilizer at a time to well meet the demand of rice plant direct-seeded on flooded paddy. We concluded that TN would be the nitrogen fertilization method to enhance N use efficiency in direct-seeded rice on flooded paddy.

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  5. [국내논문]   Ammonium and Nitrate Uptake and Utilization Efficiency of Rice varieties as Affected by Different N-Concentrations   피인용횟수: 1

    Choi Kyung-Jin (National Institute of Crop Science, RDA ) , Swiader John M. (University of Illinois College of Agriculutre, Consumer and Environmental Science)
    Korean journal of crop science = 韓國作物學會誌 v.50 no.1 ,pp. 22 - 27 , 2005 , 0252-9777 ,

    초록

    To find out the optimum mixture ratio of ammonium and nitrate on rice plant, 4 rice varieties were examined during 14days after transplanting in hydroponics with the different ratio of ammonium to nitrate(100 : 0, 75: 25,50: 50, 25: 75 and 0: 100). The highest N uptake from solution and the maximum plant dry weight were $60\~70\%$ ammonium and $30\~40\%$ nitrate mixture treatment both in Japonica and Tongil type rice plants. And with the same varieties N-uptake and N use-efficiency were compared between 10.0 mM and 1.0 mM nitrogen using $70\%$ ammonium and $30\%$ nitrate for 24 days after transplanting. Rice plants absorbed more nitrogen $(131\~145\%)$ in 10.0mM than 1.0mM treatment but accumulated N in rice plants were almost the same in both treatment. Among the tested rice cultivars, dry matter production and total accumulative nitrogen in rice plants were much high in Tongil type than japonica type rice cultivars. N-recovery ratios of rice plants from uptake N were $90.8-99.0\%$ in low concentration N solution(1.0 mM), but $69.4-81.7\%$ were observed in high concentration N solution(10.0 mM). It means that suppling low concentration N steadily will be better to prevent loss of N without reducing of growth in rice plants.

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  6. [국내논문]   Change in Photosynthesis, Proline Content, and Osmotic Potential of Corn Seedling under High-Saline Condition  

    Yoon Byeong Sung (College of Agriculture & Life Sci., Kangwon Natl. University ) , Jin Chengwn (College of Agriculture & Life Sci., Kangwon Natl. University ) , Park Sang Un (Biology Research Center for Industrial Accelerators(BRCIA), Dongshin University ) , Cho Dong Ha (College of Agriculture & Life Sci., Kangwon Natl. University)
    Korean journal of crop science = 韓國作物學會誌 v.50 no.1 ,pp. 28 - 31 , 2005 , 0252-9777 ,

    초록

    To identify salt-tolerance characteristics of corn seedling was treated in solution of 0, 50 and 100 mM NaCl of hydroponic cultivation. In photosynthesis of corn seedling, there was no large difference between 50mM and 0 mM NaCl solution, however, in 100 mM NaCl solution, the tolerance gradually decreased to $76\%,\;49\%,\;and\;31\%$ after one day, four days, and seven days, respectively, in comparison to 0 mM NaCl solution. Osmotic potential of corn in seedling period was significantly decreased with increasing saline level, however, free proline content in the plant on the ground was significantly increased with increasing saline level and with the lapse of time. In terms of correlation among major characteristics, there was a highly significant positive difference between osmotic pressure potential and photosynthesis, However, highly negative correlation was found between osmotic pressure potential and free proline content. In addition, it was expected that young seedling of corn with saline tolerance may be utilized in the transplantation in salt-accumulated land. Based on above-shown result, in terms of saline tolerance of Chalok-2 variety, growth suppression was serious with 100mM NaCl solution. However, growth was expected that seedling growth would be favorable under 50 mM NaCl solution.

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  7. [국내논문]   Long-Term Study of Weather Effects on Soybean Seed Composition  

    Bennett John O. (Department of Agronomy, University of Missouri ) , Krishnan Hari B. (USDA-Agricultural Research Service, Plant Genetics Research Unit, University of Missouri)
    Korean journal of crop science = 韓國作物學會誌 v.50 no.1 ,pp. 32 - 38 , 2005 , 0252-9777 ,

    초록

    A long-term study initiated in 1989 at San-born Field, Columbia, Missouri, was designed to evaluate the affect of environmental factors, nitrogen application, and crop rotation on soybean (Glycine max [L.] Merr.) seed composition. Soybeans were grown as part of a four- year rotation which included corn (Zea maize L.), wheat (Triticum aestivum L.), and red clover (Trifolium pratense L.). Results from soil tests made prior to initiation of the study and subsequently every five years, were used to calculate application rates of nitrogen, phosphorus, and potassium necessary for target yield of pursuant crops. In the experimental design, nitrogen was applied to one-half of the plot on which the non-leguminous crop, either corn or wheat was grown. Analysis of soybean seed by near infrared reflectance spectroscopy collected over an 11-year period revealed a linear increase in protein and decrease in oil content. Application of nitrogen fertilizer to non-leguminous crops did not have an apparent effect on total protein or oil content of subsequent soybean crop. Analysis of soybean seed proteins by sodium dodecyl sulfate polyacrylamide gel electrophoresis in conjunction with computer­assisted densitometry revealed subtle changes in the accumulation of seed proteins. Immunoblot analysis using antibodies raised against the $\beta-subunit$ of $\beta-conglycinin$ showed a gradual increase in the accumulation of the 7S components during successive years of the experiment. A linear increase in temperature and decrease in rainfall was observed from the onset of data· collection. Higher temperatures during the growing season have been linked to increased protein and diminished oil content of soybean, thus changes observed in this study are possibly related to climatic conditions. However, crop rotation and subsequent changes in soil ecology may contribute to these observed changes in the seed composition.

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  8. [국내논문]   Physiological and Biochemical Responses of Fifteen Rice Cultivars to UV-B Radiation  

    Sung Jwa-Kyung (Division of Organic Farming, NIAST, RDA ) , Chung Jong-Wook (Division of Genotic Resources, NIAB, RDA ) , Lee Sang-Min (Division of Organic Farming, NIAST, RDA ) , Lee Yong-Hwan (Division of Organic Farming, NIAST, RDA ) , Choi Du-Hoi (Division of Organic Farming, NIAST, RDA ) , Kim Tae-Wan (Department of Plant Resource Science, Hankyong National University ) , Song Beom-Heon (Department of Agronomy, Chungbuk National University)
    Korean journal of crop science = 韓國作物學會誌 v.50 no.1 ,pp. 39 - 44 , 2005 , 0252-9777 ,

    초록

    This study was conducted to examine the physiological and biochemical responses against UV-B radiation in the seedling of 15 different rice cultivars, having the different physiological sensitivities. Out of 15 rice cultivars tested, moderate and susceptible groups showed significant decreases in biomass and RGR (relative growth rate). Contents of total chlorophyll were reduced remarkedly by irradiation of UV-B. In all rice cultivars tested, the content of chlorophyll a was strongly decreased, while the contents of chlorophyll b were slightly reduced without showing clear different among three groups and 15 cultivars. Carotenoid content was largely reduced by UV-B radiation, whereas polyamine content was moderately increased. The contents of MDA (malondialdehyde) that reflect the level of lipid peroxidation of cell membranes were clearly increased by UV-B stress, showing higher content in susceptible cultivars than moderate and torelant cultivars. The physiological important parameters highly related to visible injury were leaf color, chlorophyll, carotenoid, and lipid peroxidation, whereas biomass and polyamines were not closely correlated. Based on this results, it was concluded that changes of visible injury and the contents of chlorophyll and MDA could be adequately applied and utilized as physiological indicators to UV-B radiation.

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  9. [국내논문]   Varietal Differences of Dry Matter Accumulation and Related Characters in Cassava (Manihot esculenta Crantz)  

    Park Chang-Ho (Dept. of Agronomy, Bogor Agricultural Univ.(IPB) ) , Kim Kwang-Ho (Dept. of Crop Science, Coll. Of Agri. & Life Sci., Konkuk Univ., ) , Aswidinnoor Hajrial (Dept. of Agronomy, Bogor Agricultural Univ.(IPB) ) , Rumawas Fred (Dept. of Agronomy, Bogor Agricultural Univ.(IPB))
    Korean journal of crop science = 韓國作物學會誌 v.50 no.1 ,pp. 45 - 54 , 2005 , 0252-9777 ,

    초록

    This study was carried out to investigate the patterns of dry matter (DM) production and accumulation, and to screen the relationships between related major growth characters and DM accumulation in four cassava varieties in Bogor $(6^{\circ}19'-6^{\circ}47'S,\;106^{\circ}21'-107^{\circ}13'E)$ , West Java, Indonesia. Gading and Adiral developed an enough source and canopy in short at the early growth phase and then translocated assimilates to storage roots with a higher partitioning rate, even these varieties were considered as early-bulking varieties, which have superior source and sink potentials in increasing yield and DM of tubers. The root/shoot ratio (R/SR), total dry weight (TDW), leaf area duration, leaf area index (LAI), and number of tubers showed higher positive correlations with the dry weight of roots (DWR), and the direct effects of TDW, R/SR, and LAI on the DWR were higher. These characters were considered to be useful target characters to screen cassava varieties with high yield potential and high DM in aspect of tuber production.

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

    이미지

    Fig. 1 이미지
  10. [국내논문]   Effect of Expanded Rice Husk Medium on Rice Seedling for Machine Transplanting  

    Ko Jonghan (Texas Tech University ) , Kim Doo Yeol (Kangwon Agricultural Research and Extension Services ) , Sa Jong Gu (Kangwon Agricultural Research and Extension Services ) , Lee Byun Woo (Seoul National University ) , Lee Youn Su (Kangwon National University)
    Korean journal of crop science = 韓國作物學會誌 v.50 no.1 ,pp. 55 - 59 , 2005 , 0252-9777 ,

    초록

    Rice farmers can save labor and expenses by using expanded rice husk (ERH) as a seedling medium since ERH is lighter and cheaper than other commercial seedling media (CSM). This study was carried out to develop a method for rice seedling cultivation using ERH as a seedling medium. It is suggested that a mixture of $60\%$ of ERH and $40\%$ of a CSM could be used as a seedling medium; the planting densities would be 240g per tray for infant seedlings and 200 g for young seedlings; and nitrogen (N) would be applied at a rate of 1g per tray for infant seedlings prior to planting and 2g per tray for young seedlings with division. Great care should be taken to use $CO(NH_2)_2$ as an N-source fertilizer. These results would lay a foundation for the rice seedling cultivation with ERH as a medium.

    원문보기

    원문보기
    무료다운로드 유료다운로드

    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

    이미지

    Fig. 1 이미지

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