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한석호(Suk-Ho Han),서홍석(Hong-Seok Seo),염정완(Jung-Won Youm) 한국산학기술학회 2017 한국산학기술학회논문지 Vol.18 No.1
본 논문은 국산 배와 일본산 배에 대한 국내소비자의 무차별 선호를 가정한 가격격차 방법론을 적용하여 일본산 배의 수입금지 조치 해제 시 경제적 · 정량적 영향을 사전에 분석하는 방법론을 소개한다. 방법론을 이용하여 2018년 일본산 배의 수입허용 가정 시 시뮬레이션을 수행한 결과, 연평균 5만 톤의 일본산 배가 국내시장에 유입될 것으로 추정된다. 이 수입량은 국내 배 가격하락 뿐만 아니라 국산 배 생산량 감소를 야기하여 국내 배 생산 감소효과를 초래하여, 연평균 930억원 수준의 직접적인 피해가 예상된다. 국내 배 재배면적과 생산량은 베이스라인 대비 0.7%, 1.4% 감소할 것으로 예측된다. 또한, 생산 · 소비 대체재를 포함한 다른 품목 부문에 미치는 간접적인 영향을 합한 전체 농업분야의 연평균 감소액은 약 2,090억 원 수준으로 베이스라인 대비 0.4% 감소할 것으로 전망된다. 본 연구에서 제안한 SPS 수입금지 조치 해제 시나리오 영향평가는 기존에 수행해오던 양허안 중심의 시나리오 분석과 병행하여, 메가 FTA 참여 시 농업분야 파급영향의 사전분석 방법론을 개선할 것으로 기대된다. This paper proposed a methodology to analyze the economic and quantitative effects of lifting the import ban on Japanese pears by applying a price gap approach in the absence of any preference for either type of pear. Assuming that Korea will allow Japanese pear imports in 2018, the simulation results show that an annual average of 50,000 tons will flow into the domestic market from Japan. These imports will cause a decrease in the price and production of domestic pears, which would have a direct effect on the domestic pear industry, leading to an annual average reduction of 93 billion won. The cultivation area and production quantity are projected to be decreased by 0.7% and 1.4%, respectively, compared to the baseline. Also, the annual average reduction in the overall agriculture sector is predicted to be about 209 billion won, which is a 0.4% reduction compared to the baseline. This research is expected to improve the methodologies available for proactive analysis, with the existing analysis focused on customs tariffs when Korea considers joining mega-FTAs.
Youm, Jung Won,Won, Young Suk,Jeon, Jae Heung,Moon, Ki Beom,Kim, Hyoung Chin,Shin, Kee-Sun,Joung, Hyouk,Kim, Hyun Soon American Society for Microbiology 2010 Clinical and vaccine immunology Vol.17 No.12
<B>ABSTRACT</B><P>The ability of potato-derived major surface antigen of hepatitis B virus (P-HBsAg) to elicit antibody responses to different dosages of P-HBsAg ranging from 0.02 to 30 μg administered orally in mice was examined. All immunized groups produced specific serum IgG and fecal IgA antibodies against P-HBsAg, even at low levels (<5 μg), after administration of a 0.5-μg yeast-derived HBsAg (Y-HBsAg; LG Life Sciences, Republic of Korea) booster.</P>
Economic impact of digitalization on agriculture: a Korean perspective
Jung-Won Youm,명수환,유정호 충남대학교 농업과학연구소 2022 Korean Journal of Agricultural Science Vol.49 No.1
The global trade environment is rapidly changing. The spread of COVID-19 promotes digitalization, and online transactions are becoming the new normal. Currently, Korea is actively introducing information and communication technology (ICT) that uses the internet of things (IoT) in relation to agriculture. However, few studies have analyzed the impact of digitalization on trade in the agricultural sector. Thus, the purpose of this study is to examine how the introduction of digital technology can affect the economy and trade of Korea. In this study, we estimate the impact of introducing digital technologies using the computable general equilibrium (CGE) model. The results of this analysis indicate that the GDP could increase by 3.82% to 10.53%. Also, agricultural production and trade according to the model will significantly increase to 8.67% and 5.72%, respectively, through a productivity increase from Blockchain, IoT, and artificial intelligence (AI) technologies, despite logistics inefficiencies. Although the effects of digitalization could be significant, farmers are still struggling to introduce digital technologies, stemming from the fact that government support systems are concentrated in only a few sub-sectors. In this regard, support in this area must be expanded and diversified according to the current environment of agriculture in Korea.
Stable Maintenance of Human Beta Amyloid in Transgenic Potato
Jung Won Youm,Jae Heung Jeon,Hee Kim,Young Ho Kim,Hyouk Joung,Hyun Soon Kim 한국원예학회 2008 Horticulture, Environment, and Biotechnology Vol.49 No.1
Beta amyloid (Aβ) is a potent oral immunogen with potential utility as a vaccine against Alzheimer's disease (AD). Our previous work investigated the ability of a protein comprised of five tandem repeats of Aβ42(5Aβ42) to induce an immune response in a transgenic AD mouse model, and demonstrated that immunization with potato-derived 5Aβ42 reduced the Aβburden as well as many of the AD-associated pathological features. To provide a potato-derived 5Aβas vaccine material, the stable yield of 5Aβprotein through constant expression of introduced transgene is the most important factor. In the present study, we confirmed that the 5Aβ42 transgene were inherited and stably expressed in in vitro vegetative propagation over a period of 3 years without silencing. The 5Aβ42 protein, too, was expressed well without change of its antigenicity in transgenic potato. Stable storage conditions were vital in maintaining the stability of the potato-derived 5Aβ42 protein, and activity of the protein was not affected following up to three months’ storage at low temperature.
Transgenic potato expressing Aβ reduce Aβ burden in Alzheimer’s disease mouse model
Youm, Jung Won,Kim, Hee,Han, Jee Hye Lo,Jang, Chang Hwan,Ha, Hee Jin,Mook-Jung, Inhee,Jeon, Jae Heung,Choi, Cheol Yong,Kim, Young Ho,Kim, Hyun Soon,Joung, Hyouk Elsevier 2005 FEBS letters Vol.579 No.30
<P><B>Abstract</B></P><P>Beta amyloid (Aβ) is believed one of the major pathogens of Alzheimer’s disease (AD), and the reduction of Aβ is considered a primary therapeutic target. Immunization with Aβ can reduce Aβ burden and pathological features in transgenic AD model mice. Transgenic potato plants were made using genes encoding 5 tandem repeats of Aβ1–42 peptides with an ER retention signal. Amyloid precursor protein transgenic mice (Tg2576) fed with transgenic potato tubers with adjuvant showed a primary immune response and a partial reduction of Aβ burden in the brain. Thus, Aβ tandem repeats can be expressed in transgenic potato plants to form immunologically functional Aβ, and these potatoes has a potential to be used for the prevention and treatment of AD.</P>
Development of Marker-Free Transgenic Potato Hairy Roots Using Agrobacterium rhizogenes
Jung Won Youm,Jae Heung Jeon,Mi Sun Kim,Jae Hyun Kim,Yoon Sik Kim,Han Na Klm,Hyouk Joung,Byung Dong Kim,Hyun Soon Kim 한국원예학회 2007 Horticulture, Environment, and Biotechnology Vol.48 No.2
Agrobascterium rhizogenes KCTC2744 and A. tumefaciens LBA4404 harboring the binary vector pBIl21 were used to transform potato plants. Transformation efficiency was monitored by detecting the β-glucuronidase (GUS) transcripts and the enzyme activity. The GUS expression of potato hairy roots regenerated by A. rhizogenes-mediated transformation was found to be approximately two-fold higher than that by A. tumefaciens-mediated transformation. All hairy roots were induced by A. rhizogenes on Murashige and Skoog medium without antibiotics. The hairy roots were transformed to pBI121 and pCAMbar-by A. rhizogenes KCTC2744. The GUS expression patterns, including hairy roots regeneration and staining characteristics, were investigated. No significant differences were observed between the general transgenic hairy roots and the selectable marker-free transgenic hairy roots. The polymerase chain reaction amplification and Southern blots confirmed a stable integration of foreign genes into all of the marker-free transgenic hairy roots. This is the first genetic engineering approach to the transgenic potato hairy roots genome without the use of a selectable marker gene.