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Park, Hyeona,Mameda, Naresh,Choo, Kwang-Ho Elsevier 2018 Chemical Engineering Journal Vol.345 No.-
<P><B>Abstract</B></P> <P>Electrocatalytic degradation of micropollutants is an attractive strategy for advanced wastewater management, but the development and optimization of innovative anodic materials are needed. This study investigated newly designed metal-TiO<SUB>2</SUB> nanopowder composite coated Ti mesh anodes for enhanced degradation of 1,4-dioxane (10 mg/L spiked) and dyes present in real industrial wastewater effluents. Based on multi-component mixture coating tests, a metal-TiO<SUB>2</SUB> composite for the most efficient electrocatalytic degradation of 1,4-dioxane was attained in the binary molar composition range of Ru:Ti = 0.6:0.4–0.9:0.1. Interestingly, Ir addition (i.e., ternary metal oxide composite) always had an antagonistic impact on the electrocatalytic performance. The binary metal oxide composite structure was X-rayed and identified as comprising RuO<SUB>2</SUB>-TiO<SUB>2</SUB> crystals. Substantive removal of 1,4-dioxane and color was achieved with a small coating amount, but thicker coating had no or negative effects. This is possibly because the production of the oxidants responsible for organics degradation (reactive chlorine species and hydrogen peroxide) decreases with excessive coating layers. A properly coated binary RuO<SUB>2</SUB>-TiO<SUB>2</SUB> composite Ti mesh anode was as effective (or more so) than the boron-doped diamond electrode in terms of 1,4-dioxane degradation and decolorization of real textile wastewater.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Metal oxide composite Ti mesh anodes for efficient 1,4-dioxane removal were designed. </LI> <LI> The most active metal oxide structure (RuO<SUB>2</SUB>-TiO<SUB>2</SUB>) and composition were identified. </LI> <LI> The 0.6RuO<SUB>2</SUB>-0.4TiO<SUB>2</SUB> composite anode outperformed a boron-doped diamond electrode. </LI> <LI> Forming a proper coating layer thickness is required for optimal 1,4-dioxane removal. </LI> <LI> Reactive chlorine species and H<SUB>2</SUB>O<SUB>2</SUB> oxidants are predominant at the composite anode. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Yu Hyeona,Yoon Joohyun,Lee Chan Woo,Park Ji Yoon,Jang Yoonjeong,Park Yun Seong,Ryoo Hyun A,Cho Nayoung,Oh Sunghee,Kim Won,Woo Jong-Min,Kang Hyo Shin,Ha Tae Hyon,Myung Woojae 대한신경정신의학회 2022 PSYCHIATRY INVESTIGATION Vol.19 No.9
Objective The Temperament Evaluation of Memphis, Pisa, Paris, and San Diego Autoquestionnaire (TEMPS-A) has been validated in more than 30 languages and is noted for its broad application in research and clinical settings. This study presents the first attempt to examine the reliability and validity of the TEMPS-A in Korea.Methods A total of 540 non-clinical participants completed the Korean TEMPS-A, which was adapted from the original English version via a comprehensive translation procedure. Reliability was assessed using Cronbach’s α, and associations between temperaments were examined using Spearman’s correlation coefficient. Exploratory factor analysis (EFA) was performed, and differences in TEMPS-A scores between the gender- and age-based groups were examined using Kruskal-Wallis analysis.Results The Korean TEMPS-A exhibited excellent internal consistency (0.70–0.91) and significant correlations between subscales. EFA resulted in a two-factor structure: Factor I (depressive, cyclothymic, irritable, and anxious) and Factor II (hyperthymic). Gender and age group differences were observed.Conclusion Overall, our results suggest that TEMPS-A is a reliable and valid measure of affective temperaments for the Korean population. This study opens new possibilities for further research on affective temperaments and their related traits.
Jeon, Hyeona,Tsui, Jonathan H.,Jang, Sue Im,Lee, Justin H.,Park, Soojin,Mun, Kevin,Boo, Yong Chool,Kim, Deok-Ho American Chemical Society 2015 ACS APPLIED MATERIALS & INTERFACES Vol.7 No.8
<P>Endothelial physiology is regulated not only by humoral factors, but also by mechanical factors such as fluid shear stress and the underlying cellular matrix microenvironment. The purpose of the present study was to examine the effects of matrix topographical cues on the endothelial secretion of cytokines/chemokines in vitro. Human endothelial cells were cultured on nanopatterned polymeric substrates with different ratios of ridge to groove widths (1:1, 1:2, and 1:5) and with different stiffnesses (6.7 MPa and 2.5 GPa) in the presence and absence of 1.0 ng/mL TNF-α. The levels of cytokines/chemokines secreted into the conditioned media were analyzed with a multiplexed bead-based sandwich immunoassay. Of the nanopatterns tested, the 1:1 and 1:2 type patterns were found to induce the greatest degree of endothelial cell elongation and directional alignment. The 1:2 type nanopatterns lowered the secretion of inflammatory cytokines such as IL-1β, IL-3, and MCP-1, compared to unpatterned substrates. Additionally, of the two polymers tested, it was found that the stiffer substrate resulted in significant decreases in the secretion of IL-3 and MCP-1. These results suggest that substrates with specific extracellular nanotopographical cues or stiffnesses may provide anti-atherogenic effects like those seen with laminar shear stresses by suppressing the endothelial secretion of cytokines and chemokines involved in vascular inflammation and remodeling.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/aamick/2015/aamick.2015.7.issue-8/acsami.5b00554/production/images/medium/am-2015-00554x_0009.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/am5b00554'>ACS Electronic Supporting Info</A></P>