김종욱 교수

Monodisperse gold nanoparticles were prepared via electron beam irradiation of Au(I)-SR (R = -CnH2n+1) polymers with highly ordered supramolecular structures in transmission electron microscopy. The Au(I)-SR polymers were synthesized simply by mixing LiAuCl4 and an excess amount of alkanethiol in tetrahydrofuran. The sizes of the gold nanoparticles were controlled by changing the length of the alkyl group or by adjusting the energy of the electron beam.

Sulfur, strontium, and lead isotopic analyses were performed on chimneys from the hydrothermal vent fields (the PACMANUS and Susu knolls) in the eastern Manus back arc basin. Lead isotope composition varies in a narrow range ( 206 Pb/ 204 Pb = 18.75–18.78, 207 Pb/ 204 Pb = 15.51–15.54, and 208 Pb/ 204 Pb = 38.31–38.40). Strontium isotopic ratios ( 87 Sr/ 86 Sr) of sulfate minerals vary from 0.7051 to 0.7077, falling between those of seawater (0.7090) and the hydrothermal fluid end‐member (0.7050

Abstract Four new hydrothermal vent fields were discovered on the slow spreading Central Indian Ridge (8–12°S; Segments 1–3), all located off‐axis on abyssal hill structures or Ocean Core Complexes (OCCs). Each site was characterized using seafloor observation (towed camera system), plume chemistry (Fe, Mn, and CH 4 ; Conductivity, Temperature, and Depth sensor [CTD]/Miniature Autonomous Plume Recorder [MAPR]), and rock sampling (TVgrab/dredges). Different styles of venting on each segment refle

Research Article| April 01, 2011 Metal-bearing molten sulfur collected from a submarine volcano: Implications for vapor transport of metals in seafloor hydrothermal systems Jonguk Kim; Jonguk Kim * Deep-sea and Marine Georesources Research Department, Korea Ocean Research and Development Institute, Ansan, P.O. Box 29, Seoul 425-600 Korea *E-mail: jukim@kordi.re.kr. Search for other works by this author on: GSW Google Scholar Kyeong-Yong Lee; Kyeong-Yong Lee Deep-sea and Marine Georesources Resea

The regional distribution of hydrothermal vent activity in the northeastern (NE) Lau Basin was recently reported by the Ridge 2000 program; however, active venting sources have yet to be located. Here, we report geological and hydrological evidence that indicates the presence of three active hydrothermal venting sources in the NE Lau Basin: the Fonualei Rift and Spreading Center (FRSC), the Northeast Lau Spreading Center (NELSC), and an off-axis caldera (MTJ-1). These examples of hydrothermal ac

B2C 전자상거래는 이제 대표적인 마케팅 채널의 하나로 자리 잡고 있다. 그러므로 B2C 쇼핑몰에서의 구매는 컴퓨터와인터넷을 이용한 상품의 구매행위로 이해되어야 할 것이며, 따라서 B2C 전자상거래를 통한 구매는 기존의 소비자 행동에 관한 이론과 컴퓨터의 사용에 관한 인간 행동에 관한 제반 이론이 함께 그 연구의 기반이 되어야 할 것이다. 그러나최근 경영정보학 분야에서 B2C 쇼핑몰에 대한 많은 연구들이 이루어 졌지만 아직 정보기술의 수용에 관한 이론을 근간으로 B2C 쇼핑몰에서의 행동을 설명하려고 노력하고 있다. 반면에 마케팅에서의 연구는 아직 소비자 행동 측면에서 바라보아 B2C 전자상거래에서 핵심적인 역할을 수행하는 정보기술의 수용에 대한 논의는 거의 전무한 실정이다. 근본적으로 B2C 쇼핑몰의 사용은 정보기술을 이용한 구매행위이기에 이들에 관한 제반 이론들이 모두 뒷받침 되어야 새로운 온라인 시장에서의 소비자의 행위를 보다 잘 이해할 수 있을 것으로 판단된다. 이러한 관점에서

AbstractAs part of basic studies of monitoring carbon dioxide (CO2) storage using electrical and seismic surveys, laboratory experiments have been conducted to measure resistivity and P-wave velocity changes due to the injection of CO2 into water-saturated sandstone. The rock sample used is a cylinder of Berea sandstone. CO2 was injected under supercritical conditions (10 MPa, 40°C). The experimental results show that resistivity increases monotonously throughout the injection period, while P-wa

Abstract The complex geology and expansive axial valleys typical of slow‐spreading ridges makes evaluating their hydrothermal activity a challenge. This challenge has gone largely unmet, as the most undersampled MOR type for hydrothermal activity is slow spreading (20–55 mm/yr). Here we report the first systematic hydrothermal plume survey conducted on the Central Indian Ridge (CIR, 8°S–17°S), the most extensive such survey yet conducted on a slow‐spreading ridge. Using a combined CTD/Miniature