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주교진,전소희,노동윤 서울여자대학교 자연과학연구소 2013 자연과학연구논문집 Vol.25 No.-
The morphology change of silver nano-structures has been investigated by changing reagent concentrations, the speed of a magnetic bar, reaction temperature, and reaction time in the polyol process which were carried out in ethylene glycol solutions containing AgNO3 as a metal source and PVP (polyvinylpyrolidone) as a capping agent. Under optimized reactions, silver nanowires or nanocubes were obtained as a major product, and their morphology and composition were identified by FE-SEM and EDX analyses, respectively.
주교진,박신애,노동윤 서울여자대학교 자연과학연구소 2012 자연과학연구논문집 Vol.24 No.-
Using optically-active 2,2'-bis(diphenylphosphino)-1,1'-binaphthyl (BINAP) as a P-donor, heteroleptic Pt(Ⅱ) compounds (R)-/(S)-(BINAP)Pt(TFBT)2 (H(TFBT) = 2,3,5,6-tetrafluorobenzenethiol) are prepared from (R)-/(S)-(BINAP) and (COD)PtCl2 via (R)-/(S)-(BINAP)PtCl2. These Pt(Ⅱ) compounds are characterized by FT-IR and 1H NMR spectroscopic analyses. It is noted that the arylmonothiolate ligand (TFBT) is labile in solution due to the lack of chelate effect.
정교철,김진성 안동대학교 환경연구소 2001 환경연구 Vol.1 No.-
The area under investigation for the past ten years is in the vicinity of the Imha dam. The area is excavated for construction of new road in 1989. Differential heave in one part of the area is occurred and differential subsidence and cracking in another part are took place because of the road construction. The rocks involved are sandstone, shale and mudstone. Geotechnical and surveying techniques have been used to analyze slope instability in the past but without solving the problem of the mechanism of the these failure processes. Geophysical methods (electric resistively method and seismic prospecting method) were applied in order to identify underground geology and geological structures. The interpretation of these slope failure studies is not a straightforward analysis, but the general conclusion is that the complexity of a slope failure requires a complex investigative approach by using a combination of different geophysical methods and geotechnical methods.