Choong Hun Lee

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BACKGROUND Portulaca oleracea (PO) has been widely used as traditional medicine because of its pharmacological activities. However, the effects of PO on osteoclasts that modulate bone homeostasis are still elusive. METHODS In this study, we examined the effects of PO ethanol extract (POEE) on receptor activator of nuclear factor-κB ligand (RANKL)-mediated(More)
Two new hole transporting materials, named HTM 1A and HTM 1B, were designed and synthesized in significant yields using the well-known Buchwald Hartwig and Suzuki cross- coupling reactions. Both materials showed higher decomposition temperatures (over 450 °C) at 5% weight reduction and HTM 1B exhibited a higher glass transition temperature of 180 °C. Red(More)
In this paper, growth behavior of high density Al2O3 which was prepared by using cyclic chemical vapor deposition (C-CVD) system has been systematically investigated. Tri-Methyl-Aluminum (TMA) and oxygen (02) plasma was used as source precursor and reactant, respectively. Unlike the conventional ALD system that source precursor and reactant was injected(More)
Inorganic/organic hybrid thin film encapsulation layers consist of a thin Al2O3 layer together with polymer material. We have investigated optical properties of thin film encapsulation layers for top-emission flexible organic light-emitting diodes. The transmittance of hybrid thin film encapsulation layers and the electroluminescent spectrum of organic(More)
This study is aimed to elucidate the effects of surface pH of bioprosthetic heart valve (BHV) on their binding property to calcium and protein. It is hypothesized that the binding affinities of the BHV for calcium and protein are surface pH dependent. To test this hypothesis, collagen-elastin matrix (CEM) made of varying ratios of collagen and elastin were(More)
The constituents of Peucedanum japonicum Thunb. (PJ) exhibit biological and pharmacological activities, including anti-obesity, anti-oxidant and anti-allergic activities. The aim of the present study was to examine in vitro effects of PJ in RANKL-induced signaling pathways, which determine osteoclast differentiation. PJ ethanol extract (PEE) exhibited(More)
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