Overexpression of Rice Ferrochelatase I and II Leads to Increased Susceptibility to Oxyfluorfen Herbicide in Transgenic Rice

강기윤,이경진,박상규,Sungbeom Lee,김영순,백경환 한국식물학회 2010 Journal of Plant Biology Vol.52 No.4

Protoporphyrin IX is a photosensitizer and a causative agent of rice membrane lipid peroxidation in plant cells. Protoporphyrinogen IX oxidase (PPO) is the molecular target of PPO-inhibiting herbicides, which trigger a massive increase in protoporphyrin IX. Thus, any possible method to decrease the levels of protoporphyrin IX upon challenge with PPO-inhibiting herbicides could be employed to generate plants resistant to such herbicides. We generated transgenic rice plants overexpressing rice ferrochelatase isogenes encoding ferrochelatase enzymes, which convert protoporphyrin IX into protoheme, to see whether the transgenic plants have phenotypes resistant to PPO-inhibiting herbicides. The resulting transgenic rice plants were all susceptible to oxyfluorfen (a diphenyl-ether-type PPO-inhibiting herbicide),as judged by cellular damage with respect to cellular leakage,chlorophyll loss, and lipid peroxidation. In particular, the transgenic plants expressing rice ferrochelatase II without its plastid targeting sequence showed higher transgene expression and oxyfluorfen susceptibility than lines expressing the intact ferrochelatase II. Possible susceptibility mechanisms to oxyfluorfen herbicide in the transgenic rice plants are discussed.

중앙은행의 독립성과 금리변화의 기대경로

강기윤,장인기,최병호 한국전문경영인학회 2022 專門經營人硏究 Vol.25 No.3

본 연구는 중앙은행의 독립성 정도에 따라 기대경로를 통한 통화정책의 파급효과가 다르 게 나타날 수 있음을 부동산 시장을 통해 검정하였다. 이를 위해 중앙은행의 독립성 지수 를 기준으로 OECD 국가를 두 개의 그룹으로 나눈 후, 단기금리의 변화에 대한 부동산 가격 변화의 민감도의 그룹 간 차이가 있는가를 분석하였다. 분석 결과 중앙은행의 독립성 이 높은 국가에서는 단기금리의 변화와 부동산 가격의 변화가 유의한 음의 상관관계를 갖는 반면, 중앙은행의 독립성이 낮은 국가에서는 의미 있는 패턴이 나타나지 않았다. 중앙은행의 독립성이 명목적으로는 잘 보장된 국가에서도 시장 참여자들의 신뢰 여부에 따라 기대경로 파급효과가 달라질 수 있다는 가능성을 검정하기 위해, 추가적으로 국가별 부패인식지수와 중앙은행 독립성 지수로 4개의 국가 그룹으로 나누어 같은 분석을 반복 실시하였다. 그 결과 중앙은행의 독립성이 높은 국가 내에서도 부패인식지수가 낮은 국가 에서 금리변화에 대해 부동산 가격이 보다 강한 상관관계를 가지는 것을 확인하였다. We test whether the effects of monetary policy via the expectation channel can appear differently depending on the degree of the central bank independence by looking the real estate market. Specifically, we divide the OECD countries into two groups based on the central bank's independence index and then analyze whether there is a difference between groups in the sensitivity of real estate price changes to changes in short-term interest rates. The evidence suggests that change in short-term interest rates and change in real estate prices has a significant negative correlation in countries with high central bank independence, while no meaningful pattern appears in countries with low central bank independence. To test that the expected path from the expectation effect may vary depending on market participants' trust in countries with nominally high central bank independence, we conduct the same analysis after dividing the countries into four groups based on the corruption perceptions index and central bank independence index. As a result, we show that, within the countries with high central bank independence, real estate price has a stronger correlation with interest rate changes in countries with a low corruption perceptions index.

중앙은행 디지털화폐(CBDC) 발행이 은행산업 및 거시경제에 미치는 영향

강기윤,장인기,최병호 한국은행 2022 經濟分析 Vol.28 No.4

In this paper, we construct a monetary model in which commercial banks that have a risk of bankruptcy make deposit contracts with depositors and loan contracts with companies to investigate the effects of introducing Central Bank Digital Current (CBDC) on financial markets and macroeconomics. The introduction of CBDC alleviates a liquidity shortage in the market, which, in turn, mitigates the market inefficiency caused by the liquidity premium of asset prices, and, hence, aggregate production increases. In addition, CBDC alleviates the social welfare cost caused by bank bankruptcy by being used as a means of avoiding the bank's bankruptcy risks. We calibrate the model using Korean macroeconomic indicators, and show that the introduction of CBDC decreases the size of bank deposits and corporate loans by 1.29% and 1.32%, respectively, and increases deposit rate, loan interest rate, and aggregate production by 1.31bp, 1.32bp, and 0.24%, respectively. 본 논문은 파산위험성이 존재하는 시중은행이 예금자와 예금계약, 그리고 기업과 대출계약 거래를 하는 시장에서, 중앙은행이 Central Bank Digital Currency (CBDC)를 도입할 때 금융시장 및 거시경제에 미치는 영향을 분석한다. CBDC의 발행은 시장의 유동성 부족을 해소하여, 자산가격의 유동성 프리미엄으로 인한 시장의 비효율을 완화하고 온라인 거래량을 증가시켜 총생산을 제고한다. 또한 CBDC는 개인으로 하여금 은행의 파산위험을 일부 회피할 수 있는 수단으로 활용됨으로써 은행의 파산으로 인한 사회후생의 감소를 완화시켜 준다. 본 연구는 국내 경제지표들의 값을 근거로 정량분석의 결과도 제시한다. 구체적으로 캘러브레이션된 모형에서 CBDC가 도입될 경우 은행예금과 기업대출규모는 각각 1.29% 및 1.32%씩 감소하였고 예금이자율와 대출이자율은 각각 1.31bp 및 1.32bp씩 증가하였으며, 총생산은 0.24% 증가하였다.

Stainless steel plate를 이용한 박막 스트레인 센서의 특성

강기윤,박형호,정종학,김태송 경북대학교 센서기술연구소 2002 센서技術學術大會論文集 Vol.13 No.1

“경제정책 바꾸고 구겨진 성산구 자존심 되찾겠다”

강기윤 한국자치학회 2019 월간 주민자치 Vol.90 No.-

행정구역 통합에 영향을 미치는 요인 연구

강기윤(姜基允),이태근(李泰瑾) 한국지방자치학회 2010 韓國地方自治學會報 Vol.22 No.2

The subject of local administrative district integrations was diversely researched, however, a few researches have been conducted as a target dealing with the direct integration region. In addition to that, researches have been studied relatively little assigned a key part as the residents of a direct integration region. The research, therefore, surveyed and analyzed the opinions of the Changwon-city' residents, which is the target dealt with the direct integration region. The research conducted to modeling for whether or not of the local administrative district integration. The model included 11 independent variables, 1 intervening variable, and 1 dependent variable. The research formed the research model and analyzed the results by considering causal orders among independent, intermediate, and dependent variables to verify causal hypothesis through a multiple regression analysis. The intermediate variable in between the independent variables and the dependent variable were integration effect factor. The independent variables affecting to the intermediate variable were government support, living area, integration success, politics, given condition, stratum function, and autonomy stratum factors. The dependent variable of the research was whether or not of the integration. The independent and intermediate variables affecting to the dependent variable were integration effect, autonomy stratum, government support, monthly income factors.

Protoporphyrinogen oxidase 저해 제초제 저항성 형질전환작물 개발 현황

강기윤(Kiyoon Kang),이성범(Sungbeom Lee),백경환(Kyoungwhan Back) 韓國雜草學會 2008 Weed&Turfgrass Science Vol.28 No.4

“주민자치 실질화 위해 공무원 제도 바뀌어야” 외

이흥석,강기윤,여영국 한국자치학회 2020 월간 주민자치 Vol.103 No.-

경기지역 외국인직접투자(FDI)의 주요 특징과 정책적 시사점

김혜림,강기윤 경기연구원 2011 경기도경제동향 Vol.2011 No.11

HPLC Analysis of Serotonin, Tryptamine, Tyramine, and the Hydroxycinnamic Acid Amides of Serotonin and Tyramine in Food Vegetables

Dalin Ly,강기윤,Jang-Yeol Choi,Atsushi Ishihara,백경환,이성진 한국식품영양과학회 2008 Journal of medicinal food Vol.11 No.2

Biogenic monoamines such as serotonin, tryptamine, and tyramine function as neurotransmitters and mitogenicfactors in animals and are involved in flowering, morphogenesis, and protection from and adaptation to environmental changesin plants. In plants, serotonin and tyramine are conjugated to form phenolic compounds via thioester linkages during the syn-thesis of hydroxycinnamic acid amides, including p-coumaroylserotonin (CS), feruloylserotonin (FS), p-coumaroyltyramine(CT), and feruloyltyramine (FT). In this study, we determined the amounts of the biogenic monoamines CS, FS, CT, and FTin commonly consumed vegetables using high-performance liquid chromatography. Serotonin, tryptamine, and tyramine weredetected in all vegetables tested. The serotonin levels ranged from 1.8 to 294 .g/g of dry weight, the tryptamine levels rangedfrom 0.8 to 372 .g/g of dry weight, and the tyramine levels ranged from 1.4 to 286 .g/g of dry weight. The highest sero-tonin and tryptamine contents were found in tomato and cherry tomato (140.3222 .g/g of dry weight), while paprika andgreen pepper had higher tyramine contents than the other vegetables (286 and 141.5 .g/g of dry weight, respectively). Over-all, the levels of CS, FS, CT, and FT ranged from 0.03 to 13.8 .g/g of dry weight, with green onion possessing the highestlevels of CS (0.69 .g/g of dry weight), FT (1.99 .g/g of dry weight), and CT (13.85 .g/g of dry weight).