• Journal of Pharmaceutical Investigation
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• v.16 no.4
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• pp.158-170
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• 1986

This is the article on the uses, methods of elaboration, qualitative, and quantitative evaluations, of organic and inorganic bismuth trivalent compounds. The obvious accent appears to be on the therapeutic uses. However, their interest will relate to all, for the reader looking beyond that first impression will be treated to an amazingly rich compendium of historical applications that can only prompt new questions and open up unsuspected horizons in seemingly unrelated area.

• Proceedings of the Optical Society of Korea Conference
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• 2007.07a
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• pp.103-103
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• 2007

• Proceedings of the Optical Society of Korea Conference
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• 2007.07a
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• pp.107-107
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• 2007

• Proceedings of the Korean Institute of Surface Engineering Conference
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• 2009.05a
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• pp.141-141
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• 2009

흑색 3가크롬용액을 최적의 전착조건을 찾기 위해서 pH와 온도의 변화에 따란 Hull-cell test, 두께측정, 분극실험을 실시하였다. 온도가 올라갈수록, pH가 낮을수록 도금층의 두께가 두꺼워졌으나, 온도 $40^{\circ}C$, pH 3.4-3.8일때 균일한 도금층을 얻을 수 있었다.

• Journal of Magnetics
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• v.3 no.1
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• pp.1-3
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• 1998

Valence state of the Sm metal is investigated using the total energy linearized muffin-tin orbital (LMTO) band method for the observed Sm-type crystal structure. We have considered both the relativistic and the semi-relativistic description of 4f-core electrons. We have found that, in the paramagnetic phase of bulk Sm, the trivalent valence state is more stable at the observed lattice constant than the divalent valence state.

• Bulletin of the Korean Chemical Society
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• v.25 no.11
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• pp.1692-1694
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• 2004

• Proceedings of the Korean Institute of Surface Engineering Conference
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• 2007.11a
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• pp.81-82
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• 2007

3가크롬 도금액은 크롬원 (황화물계 또는 염화물계), 착화제, 완충제, 전도보조제, 산화방지제, 유기첨가제등으로 구성되어 있으며, 특히 착화제와 유기첨가제가 용액의 안정성 및 균일전착성에 미치는 영향이 크다고 보고되고 있다. 본 연구에서는 카르복시기의 작용기를 갖는 유기산을 착화제로 사용하고, 다양한 유/무기 첨가제의 조합 및 첨가량을 조절하여 크롬의 전착특성을 고찰하였다.

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2017.10a
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• pp.357-358
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• 2017

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2017.10a
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• pp.367-368
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• 2017

• Journal of the Korean institute of surface engineering
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• v.37 no.2
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• pp.80-85
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• 2004

Chromium-carbon (Cr-C) and chromium-carbon-phosphorus (Cr-C-P) alloy deposits using trivalent chromium sulfate baths containing potassium formate were prepared to study their current efficiency, hardness change and phase transformations behavior with heat treatment, respectively. The current efficiencies of Cr-C and Cr-C-P alloy deposits increase with increasing current density in the range of 15-35 A/dm$^2$. Carbon content of Cr-C and phosphorous of Cr-C-P layers decreases with increasing current density, whereas, the carbon content of Cr-C-P layer is almost constant with the current density. Cr-C deposit shows crystallization at $400^{\circ}C$ and has (Cr+Cr$_{ 23}$$C_{6}$) phases at $800^{\circ}C$. Cr-C-P deposit shows crystallization at $600^{\circ}C$ and has (Cr+Cr$_{23}$ $C_{6}$$+Cr_3$P) phases at $800^{\circ}C$. The hardness of Cr-C and Cr-C-P deposits after heating treatment for one hour increase up to Hv 1640 and Hv 1540 and decrease about Hv 820 and Hv 1270 with increasing annealing temperature in the range of $400～^{\circ}C$, respectively. The hardness change with annealing is due to the order of occurring of chromium crystallization, precipitation hardening effect, softening and grain growth with temperature. Less decrease of hardness of Cr-C-P deposit after annealing above $700^{\circ}C$ is related to continuous precipitation of $Cr_{23}$ $C_{6}$ and $Cr_3$P phases which retard grain growth at the temperature.