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이주관 ( Ju Guan Lee ),양수영 ( Su Young Yang ),이진우 ( Jin Woo Lee ),오영선 ( Young Seon Oh ),이용구 ( Yong Koo Lee ),박양춘 ( Yang Chun Park ) 대전대학교 한의학연구소 2011 한의학연구소 논문집 Vol.19 No.2
Cough is an important defensive reflex of the respiratory tract needed to clear and protect the upper airways, but it may become exaggerated and interfere quality of life. Gastroesophageal reflux disease (GERD) is one of the three most common causes of chronic unexplained cough. Diagnosing GERD related cough is challenging since many patients do not have esophagitis or an increased esophageal acid exposure during 24h esophageal pH-metry. We treated two patients who had chronic cough, these subjects were diagnosed as Sikjeoksu (Shijisou, 食積嗽) and was administered Pyeongjingeonbi-tang (Pingchenjianpi-tang, 平陳健脾湯). First case had stuffiness below the heart and acid regurgitation with cough, but second case only had cough. After treatment, cough and other symptoms were improved. It showed that we must consider GERD on chronic cough patients.
Synthesis of ZnS Microspheres by Template-Free Hydrothermal Method for Photocatalytic Reaction.
Park, Ju-Young,Choi, Do-Young,Hwang, Kyung-Jun,Park, Seo-Jin,Yoon, Soon-Do,Yun, Yeon-Hum,Zhaol, Xing Guan,Gul, Hal-Bon,Lee, In-Hwa American Scientific Publishers 2015 Journal of nanoscience and nanotechnology Vol.15 No.7
<P>In this work, ZnS microspheres consisting of nanoblocks were synthesized by a simple, template-free approach employing a hydrothermal reaction at different temperatures, using Zn(CH3COO)2 and Na2S2O3 · 5H2O as starting materials in the aqueous solution. The synthesized samples were characterized using field-emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), and Brunauer-Emmett-Teller (BET). The photocatalysts were evaluated using photodecomposition of methylene blue under UV-C light. The photocatalytic degradation rate followed a pseudo-first-order equation. The kinetic constant (k1) of the ZnS microspheres was 5.43 x 10(-2) min(-1).</P>
Zhao, Xing Guan,Park, Ju-Young,Jin, En Mei,Gu, Hal-Bon The Electrochemical Society 2015 Journal of the Electrochemical Society Vol.162 No.1
<P>Pyrene is used as the template material in the preparation of porosity in TiO<SUB>2</SUB> films. Pores are created in the TiO<SUB>2</SUB> film, using a range of pyrene amounts (0, 2, 3, 4 wt%), to increase the light harvesting efficiency and electron charge capabilities at the TiO<SUB>2</SUB> film/dye/electrolyte interface. The specific surface area of the TiO<SUB>2</SUB> film increases from 49.2 to 115.8 m<SUP>2</SUP> g<SUP>−1</SUP> as the porosity are created with 3% pyrene added TiO<SUB>2</SUB> film (TiO<SUB>2</SUB>-pyrene-3). The pore volume of TiO<SUB>2</SUB>-pyrene-3 is 0.35 cm<SUP>3</SUP> g<SUP>−1</SUP>. The charge transfer of TiO<SUB>2</SUB>-pyrene-3 based dye-sensitized solar cell (DSSC) is faster than the other TiO<SUB>2</SUB> films. For TiO<SUB>2</SUB>-pyrene-3, the electron transport time is 4.19 ms and the electron recombination time is 34.82 ms. The diffusion coefficient is 8.36 × 10<SUP>−5</SUP> cm<SUP>2</SUP> s<SUP>−1</SUP> for TiO<SUB>2</SUB>-pyrene-0 and increases to 1.39 × 10<SUP>−4</SUP> cm<SUP>2</SUP> s<SUP>−1</SUP> for TiO<SUB>2</SUB>-pyrene-3. TiO<SUB>2</SUB>-pyrene-3 has the highest solar conversion efficiency of 7.58%, an increase of 11.47% over that of TiO<SUB>2</SUB>-pyrene-0, 6.80%.</P>
Hong, Jong Kyu,Bang, Ju Yup,Xu, Guan,Lee, Jun-Hee,Kim, Yeon-Ju,Lee, Ho-Jun,Kim, Han Seong,Kwon, Sang-Mo Dove Medical Press 2015 International journal of nanomedicine Vol.10 No.-
<P>Controlling the thickness of an electrospun nanofibrous scaffold by altering its pore size has been shown to regulate cell behaviors such as cell infiltration into a three-dimensional (3D) scaffold. This is of great importance when manufacturing tissue-engineering scaffolds using an electrospinning process. In this study, we report the development of a novel process whereby additional aluminum foil layers were applied to the accumulated electrospun fibers of an existing aluminum foil collector, effectively reducing the incidence of charge buildup. Using this process, we fabricated an electrospun scaffold with a large pore (pore size >40 μm) while simultaneously controlling the thickness. We demonstrate that the large pore size triggered rapid infiltration (160 μm in 4 hours of cell culture) of individual endothelial progenitor cells (EPCs) and rapid cell colonization after seeding EPC spheroids. We confirmed that the 3D, but not two-dimensional, scaffold structures regulated tubular structure formation by the EPCs. Thus, incorporation of stem cells into a highly porous 3D scaffold with tunable thickness has implications for the regeneration of vascularized thick tissues and cardiac patch development.</P>