• Title/Summary/Keyword: 수미

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Effect of Low Dose γ Radiation on the Dormancy Breaking and Growth of in vitro Microtubers of Potato (Solanum tuberosum L.) Stored at Low Temperature (저선량 방사선이 저온 저장한 감자 기내 소괴경의 휴면타파와 생육에 미치는 효과)

  • Kim, Jae-Sung;Kim, Dong-Hee;Back, Myung-Hwa;Jeon, Jae-Heung;Lee, Young-Bok
    • Horticultural Science & Technology
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    • v.19 no.4
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    • pp.515-520
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    • 2001
  • To observe the stimulating effect of low dose ${\gamma}$ radiation on the dormancy breaking and growth, microtubers of two potato cultivars (Solanum tuberosum L. cv. Dejima and cv. Superior) were irradiated at the dose of 0.5-30 Gy. Though it varied with cultivars and storage duration, sprouting rate, plant growth and tuber yield were promoted by 2-8 Gy irradiation in microtuber of 'Dejima' stored at low temperature. On the other hand, in microtuber of 'Superior', sprouting rate was promoted by 2 and 4 Gy irradiation, and the growth and tuber yield by 4 Gy irradiation. These results suggest that low dose of ${\gamma}$ radiation could have stimulating effects on the dormancy breaking of microtuber and potato growth.

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Biological Activities and Total Phenolic Content of Ethanol Extracts of White and Flesh-colored Solanum tuberosum L. Potatoes (일반감자와 유색감자 에탄올 추출물의 생리활성 및 폴리페놀 함량)

  • Jang, Hye-Lim;Yoon, Kyung-Young
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.41 no.8
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    • pp.1035-1040
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    • 2012
  • This study was aimed to evaluate and compare the biological activities and total phenolic content of ethanol extracts of white (Superior) and colored potatoes (Red, Rose, Haryoung, Blue, Jaseo, and Jasim). Various ethanol extracts (250, 500, 1,000, and $2,000{\mu}g/mL$) were assessed for antioxidant activities of DPPH free radicals and hydroxyl radical scavenging. The cytotoxic activity of the extracts (0, 30, 60, $100{\mu}g/mL$) was also carried out by a human cancer cell lethality bioassay method. Results showed that the DPPH and hydroxyl radical scavenging activities, of all extracts increase in a concentration-dependant manner. All color-fleshed potato extracts, except for Red and Haryoung, showed higher radical scavenging activities than the general white potato extract. Cytotoxicity of the extracts as determined in THP-1 cells showed that Blue and Jasim was highly toxic at most concentrations tested. In addition, the Blue extract had the highest cytotoxic activity on $HepG_2$ cells at the concentration $100{\mu}g/mL$. The contents of total phenolic (TPC) in the extracts significantly varied from 120.0 mg/100 g powder (Superior) to 151.1 mg/100 g powder (Blue), and TPC of all color-fleshed potato extracts was higher than that of white. The greatest positive correlation was found between phenolic contents and hydroxyl radical scavenging activity (r=0.776, p<0.05), and a strong negative correlation was found between hydroxyl radical scavenging activity and cytotoxic activities on $HepG_2$ cells (r=-0.795, p<0.05). The present study demonstrates that color-fleshed potatoes have higher antioxidant and stronger anticancer activities than general potato. These results provide useful and important information for potato breeders and researchers, in order to increase the antioxidant capacity and functional value of colored potatoes for use in the food and pharmaceutical industries.

Estimation and validation of the genetic coefficient of cv. Superior for the DSSAT-CSM (DSSAT 작물모형을 위한 수미품종의 품종모수의 결정과 기후변화에서의 활용)

  • Bak, Gyeryeong;Lee, Gyejun;Lee, Eunkyeong
    • Korean Journal of Agricultural and Forest Meteorology
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    • v.20 no.2
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    • pp.166-174
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    • 2018
  • Potato(Solanum tuberosum L.) is one of the major food crop in the world following rice, wheat, and maize. It is thus important to project yield predict of potato under climate change conditions for assessment of food security. A crop growth modelling is widely used to simulate crop growth condition and total yield of various crops under a given climate condition. The decision support system for agrotechnology transfer (DSSAT) cropping system model, which was developed by U.S. which package integrating several models of 27 different crops, have been used to project crop yield for the impact assessment of climate change on crop production. In this study, we simulated potato yield using RCP 8.5 climate change scenario data, as inputs to the DSSAT model in five regions of Korea. The genetic coefficients of potato cultivar for 'superior', which is one of the most widely cultivated potato variety in Korea were determined. The GenCalc program, which is a submodule of the DSSAT package, was used to determine the genetic coefficients for the superior cultivar. The values of genetic coefficients were validated using results of 39 experiments performed over seven years in five regions. As a case study, the potato yield was projected that total yields of potato across five regions would increase by 26% in 2050s but decrease by 17% in 2090s, compared with 2010s. These results suggested that the needs for cultivation and irrigation technologies would be considerably large for planning and implementation of climate change adaptation for potato production in Korea.

간장.된장 분야 연구동향

  • Lee, Gyeong-Gae;Kim, Jung-Gwan;Kim, Su-Mi
    • Bulletin of Food Technology
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    • v.19 no.4
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    • pp.24-48
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    • 2006
  • 본문에서는 간장 및 된장 관련 논문을 조사하여 기본적으로 저자, 국가, 연구기관별 분석을 통하여 연구분야 현황 및 기술 분류별 분석, 기술의 주요 분포도 등을 파악하였으며, 분석결과를 도식화된 그래프 및 맵핑(mapping)을 통해 체계적이며 다각적으로 나타내어 관련 분야 연구 및 기술동향을 정리하였다.

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