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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.
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.
조규상,류정인 忠南大學校 産業技術硏究所 1990 산업기술연구논문집 Vol.5 No.1
It is an experimental study to evaluate the characteristics of transient response and performance of carburettered SI engine quantititively, under rapid transient driving conditions. Performance parameters such as cylinder pressure, engine speed, torque, manifold pressure and signal of stepping motor are measured by means of data acquistion system using PC/AT and A/D converter. Performance parameters are evaluated as the function of running time. The results obtained are as follows: 1. Under the rapid transient driving conditions, the value of performance parameters is delayed and increased with transient time. 2. Stumble, hesitation, and stretchiness are increased with running time in the case of without accelerater pump. 3. A quantititive evaluation is attempted on troque fluctuations and stumbles under transient conditions by introducing the stumble rate S and achievement A.
추교완,신기영 창원대학교 사회과학연구소 2002 사회과학연구 Vol.9 No.-
인터넷쇼핑몰을 이용하여 기업은 고객에게 상품/서비스를 전달하고 고객은 이를 구매하는 비중이 점점 증가하고 있다. 본 연구는 소비자의 인터넷쇼핑몰 이용요인에 영향을 미치는 선행요인들을 밝혀 보고 인터넷 쇼핑몰의 설계 및 관리에 함의를 얻고자 한다.
林警澤 동아대학교 공과대학 부설 한국자원개발연구소 1986 硏究報告 Vol.10 No.2
Air pollutant gases were adsorbed in soils with high adsorption capacity of yellow clay to the high concentration of SO₂ gas(3530PPM) being determined. High adsorbtivity of yellow clay was found to be related to the porosity of yellow clay. Adsorbtivity of yellow clay was as high as that of alumina and silicagel. Electron microscopic scanning identified the porosity. Micro-pore size distribution was determined. X-ray diffraction spectrum suggested the components of yellow clay to be Al₂O₃, SiO₂, Fe₂O₃, CaO, MgO and MnO. DTA-TG diagram showed an endothermic curve at 432.5℃(yellow clay), exothermic curve at 308℃(in the mold) CaO and Fe₂O₃ were assayed by the Atomic absorption spectrophotometer. General bacterial count were conducted. Yellow clay adsorbed SO₂ gas in the range of 0.10-0.27 g/g. Mass-transfer coefficient was in the range of 79.7-332.5/min.