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Jo, Wanx2010,Kuen,Park, Gi Tae,Tayade, Rajesh J. John WileySons, Ltd 2015 Journal of chemical technology and biotechnology Vol.90 No.12
<P><B>Abstract</B></P><P><B>BACKGROUND</B></P><P>The present study focus on the development and feasibility of a blue light emitting diodes (LEDs) source based slurry type spiral‐shaped photocatalytic reactor for degradation of malachite green (MG) dye using P25 Degussa TiO<SUB>2</SUB><SUB>.</SUB> The influence of operational parameters such as amount of catalyst loading, initial concentration of dye, and pH of the medium has been studied for optimization of MG dye degradation.</P><P><B>RESULTS</B></P><P>The photocatalytic degradation of malachite green dye under separate irradiation by blue and by ultraviolet LED was nearly the same (∼76%). The photocatalytic activity using blue LED irradiation was observed due to the synergistic effect of MG dye adsorption on P25 Degussa, which extends the spectral response of TiO<SUB>2</SUB> to the visible region (449 nm). The optimized degradation of 20 mg L<SUP>‐1</SUP> dye was observed at pH 8 using 0.5 g L<SUP>‐1</SUP> of catalyst under irradiation by ultraviolet and blue LEDs for 1 h and 3 h, respectively.</P><P><B>CONCLUSION</B></P><P>It was found that the synergistic effect of adsorption of malachite green dye on TiO<SUB>2</SUB> surface helped to enhance photocatalytic degradation under blue LED irradiation. The application of a blue LED for photocatalytic degradation of malachite green dye is economical and feasible compared with use of an ultraviolet LED. © 2014 Society of Chemical Industry</P>
Kwak, Jeonghun,Bae, Wan Ki,Zorn, Matthias,Woo, Heeje,Yoon, Hyunsik,Lim, Jaehoon,Kang, Sang Wook,Weber, Stefan,Butt, Hansx2010,Jü,rgen,Zentel, Rudolf,Lee, Seonghoon,Char, Kookheon,Lee, Changhee WILEY‐VCH Verlag 2009 Advanced Materials Vol.21 No.48
<P><B>Quantum dot/conducting polymer hybrid films</B> are used to prepare light‐emitting diodes (LEDs). The hybrid films (CdSe@ZnS quantum dots excellently dispersed in a conducting polymer matrix, see figure) are readily prepared by various solution‐based processes and are also easily micropatterned. The LEDs exhibit a turn‐on voltage of 4 V, an external quantum efficiency greater than 1.5%, and almost pure‐green quantum‐dot electroluminescence. </P>
Li, Qian,Wang, Shuyu,Lee, Dongx2010,Kyou,Tang, Jianping,Niu, Xiaorui,Hui, Pinhong,Gutowski Jr., William J.,Dairaku, Koji,McGregor, John L.,Katzfey, Jack,Gao, Xuejie,Wu, Jia,Hong, Songx2010,You,Wan Wiley 2016 International journal of climatology Vol.36 No.13
<P><B>ABSTRACT</B></P><P>Under the framework of an project ‘Building Asian Climate Change Scenarios by Multi‐Regional Climate Models Ensemble’, the ability of eight regional climate models and two fine‐resolution global climate models to reproduce late 20th century (1981–2000) precipitation climatology is assessed. Future precipitation change (2041–2060) under the A1B scenario is also quantified by applying four different ensemble methods: equal weighting, weighted mean (WM), reliability ensemble averaging (REA) and performance‐based ensemble averaging, after applying fourfold cross‐validation using observation and multi‐model‐simulated precipitation. The results indicate that the ensemble of simulated precipitation outperforms any single RCM in many aspects. Among the four ensemble approaches, the WM and REA methods show better skill in improving the simulation results, and are used for ensemble prediction of regional climate in Asia. Under the A1B scenario, the WM method estimates future precipitation change of approximately 0.2 mm day<SUP>−1</SUP> with less precipitation in northern and western China and northern India, and more precipitation in most other areas in Asia. The future annual precipitation will decrease by 0.1‐0.5 mm day<SUP>−1</SUP> in northern India, Pakistan and the central area of southern China. No significant change is found over eastern Kazakhstan, Mongolia, north‐central and western China.</P>
Qiao, X.,Yang, L.,Li, Y.,Wan, Y.,Huang, Y.,Cheng, H.,Seo, H.J. North-Holland 2016 Materials letters Vol.163 No.-
Ni<SUB>2</SUB>FeV<SUB>3</SUB>O<SUB>11</SUB> nanorods were prepared by the sol-gel method via film-coating and subsequent heating. The sample was conducted by the crystal structure refinement confirming a pure triclinic phase with space group P-1. The surface characteristics were investigated by the measurements such as scanning electron microscope (SEM), transmission electron microscopy (TEM), specific surface area, and energy-dispersive X-ray spectroscopy (EDX). The photo-physical properties of Ni<SUB>2</SUB>FeV<SUB>3</SUB>O<SUB>11</SUB> nanorods were measured by the UV-vis absorption spectrum, and the photodegradation for methylene blue solutions (MB). This vanadate semiconductor has band-gap energy of 1.85eV and presents an efficient photocatalytic activity driven by visible-light. Moreover, the nanorods are magnetically recoverable after the photocatalysis.
Variability in Basal Melting Beneath Pine Island Ice Shelf on Weekly to Monthly Timescales
Davis, Peter E. D.,Jenkins, Adrian,Nicholls, Keith W.,Brennan, Paul V.,Abrahamsen, E. Povl,Heywood, Karen J.,Dutrieux, Pierre,Cho, Kyoungx2010,Ho,Kim, Taex2010,Wan American Geophysical Union 2018 Journal of geophysical research. Oceans Vol.123 No.11
Choice of dispersants for the nano-apatite filler of polylactide-matrix composite biomaterial
C. Deng,J. Weng,Q.Y. Cheng,S.B. Zhou,X. Lu,J.X. Wan,S.X. Qu,B. Feng,X.H. Li 한국물리학회 2007 Current Applied Physics Vol.7 No.6
The aim of this study is to compare de-aggregative ability of common organic dispersants for the acicular nano-apatite crystallite withmain composition of calcium hydroxyapatite (HA) as a ller of composite containing polylactide (PLA) matrix. Firstly, the acicularnano-apatite powders with an average length of 70120 nm were synthesized based on traditional chemical co-precipitation andfreeze-drying techniques. Common organic dispersants including tetrahydrofuran, acetone, chloroform,N,N-dimethyl formamideiments showed that nano-apatite suspension dispersed by DMF and ethanol presented homogeneous and stable colloid after vigorly stir-red for 24 h and then kept still for same time, respectively. Results of particle measurements and viscosity measurement illuminated that alarge number of the nano-apatite particles with an average dimension of 297.86 nm and viscosity of 0.8872 cP in DMF suspension couldbe dispersed up to 91.28 nm by the DMF dispersant and the DMF dispersant could minimize agglomeration between the apatite ultra-furan, acetone and ethanol, when the nano-apatite/PLA composite biomaterials were prepared.
Wu, Y.-L.,Jiang, Y.-Z.,Jin, X.-J.,Lian, L.-H.,Piao, J.-Y.,Wan, Y.,Jin, H.-R.,Joon Lee, J.,Nan, J.-X. G. Fischer 2010 Phytomedicine Vol.17 No.6
The protective effect of a diterpenoid acanthoic acid (AA) isolated from Acanthopanax koreanum Nakai was investigated in acetaminophen (APAP)-induced hepatic toxicity. Drug-induced hepatotoxicity induced by an intraperitoneal (i.p.) injection of 300mg/kg (sub-lethal dose) of APAP. Pretreatment with AA (50 and 100mg/kg) orally 2h before the APAP administration attenuated the APAP-induced acute increase in serum aspartate aminotransferase (AST), and alanine aminotransferase (ALT) activites, replenished the depleted hepatic glutathione (GSH), superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GSH-Px) activities, decreased malondialdehyde (MDA) level and considerably reduced the histopathological alterations in a manner similar to silymarin (Sily). Immunohistochemical analyses also demonstrated that AA could reduce the appearance of necrosis regions as well as caspase-3 and hypoxia inducible factor-1α (HIF-1α) expression in liver tissue. Our results indicated that AA protected liver tissue from the oxidative stress elicites by APAP-induced liver damage and suggestes that the hepatic protection mechanism of AA would relate to antioxidation and hypoxia factor on APAP-induced hepatotoxicity.
Qiao, X.,Li, Y.,Wan, Y.,Huang, Y.,Cheng, H.,Seo, H.J. Elsevier Sequoia 2016 JOURNAL OF ALLOYS AND COMPOUNDS Vol.656 No.-
The self-activated yellow-emitting CsVO<SUB>3</SUB> nanofibers were prepared by the hydrothermal reaction method. The structural refinement was conducted on the base of XRD measurement. The surface properties of the CsVO<SUB>3</SUB> nanofibers were investigated using Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), and Energy Dispersive Spectrometry (EDS). One of the morphological characterizations is the high length-diameter ratio with diameters of 100-150 nm and lengths of tens of micrometers. The UV-vis absorption spectrum and the electronic band structures of CsVO<SUB>3</SUB> nanofiber show a direct allowed electronic gap with band energy of 2.997 eV. The luminescence properties such as photoluminescence spectra, decay lifetime, color coordinates and the absolute internal quantum efficiency (η) were studied. Notably, CsVO<SUB>3</SUB> nanofibers present a bright yellow luminescence with a high quantum efficiency of 85%. It is suggested that CsVO<SUB>3</SUB> nanofibers could be used for efficient lighting and display.