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Pd 촉매하에서 Aryl-과 Alkenyliodonium Salts의 Alkoxycarbonylation에 관한 연구
강석구,야마구치 토쿠타로,호필수,김원엽 성균관대학교 기초과학연구소 1996 論文集 Vol.47 No.1
The palladium-catalyzed carbonylation of diaryliodonium tetrafluoroborates and tosylates in presence of methanol and phenol afforded aromatic esters at room temperature under atmospheric pressure of carbon monoxide. However, carbonylation of diaryliodoniurn triflates and bromides in methanol afforded 4-iodophenyl-substituted methyl esters.
Gun-Yeob Kim,Un-Sung Na,Sun-Il Lee,Hyun-Cheol Jeong,Pil-Joo Kim,Jong-Eun Lee,Young-Ho Seo,Jong-Sik Lee,Eun-Jung Choi,Sang-Uk Suh 한국토양비료학회 2016 한국토양비료학회지 Vol.49 No.6
Greenhouse-gas emission factors are widely used to estimate emissions arising from a defined unit of a specific activity. Such estimates are used both for international reporting to the United Nations Framework Convention on Climate Change (UNFCCC) and for myriad national and sub-national reporting purposes (for example, European Union Emissions Trading Scheme; EU ETS). As with the other so-called "Kyoto protocol GHGs", the Intergovernmental Panel on Climate Change (IPCC) provides a methodology for national and sub-national estimation of N₂O emissions, based on the sector from which the emissions arise. The objective of this study was to develop a integrated emission factor to estimate the direct N₂O emission from an agricultural field cultivated with the red pepper, soy bean, spring cabbage, autumn cabbage and potato in 2010∼2012. Emission factor of N₂O calculated using accumulated N₂O emission, N fertilization rate, and background N₂O emission over three year experiment was 0.00596±0.001337 kg N₂O-N (N kg)<SUP>-1</SUP>. More extensive studies need to be conducted to develop N₂O emission factors for other upland crops in the various regions of Korea because N₂O emission is influenced by many factors including climate characteristics, soil properties, and agricultural practices.
Effects of Water Management Methods on CH₄ and N₂O Emission From Rice Paddy Field
Gun-Yeob Kim,Jong-Sik Lee,Hyun-Cheol Jeong,Eun-Jung Choi,Yeon-Kyu Sonn,Pil-Joo Kim 한국토양비료학회 2013 한국토양비료학회지 Vol.46 No.6
The effects of water-saving irrigation on the emissions of greenhouse gases and the prokaryotic communities in rice paddy soils were investigated through a field experiment. In the Water-Saving (WS) irrigation, the water layer was kept at 2~3 cm while it was kept at 6 cm in the Continuousiy Flooding (CF) irrigation. A plot was treated with Intermittently Drainage (ID) that is drained as fine cracks on the floor were seen after transplanting. GHGs emission amounts from WS plots were reduced by 78.1% compared to that from CF plot and by 70.7% compared to that from ID plot, meaning that WS could help contribute to mitigation of the greenhouse gas accumulation in the atmosphere.