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Park, Min-Ouk,Seol, Dong-Won,Im, Soo-Yeon,Hur, Woo-June,Park, In-Seok The Korean Society of Fisheries and Aquatic Scienc 2007 Fisheries and Aquatic Sciences Vol.10 No.4
Survival, tag retention and tag readability were compared among the control and three treatment groups of soft-shelled turtles, Pelodiscus sinensis Crother, 2000 (mean body $weight{\pm}SD$: $182.6{\pm}13.7\;g$), marked with visible implant fluorescent elastomer (VIFE) tags for 16 months. Mortality 4 to 16 months after tagging was attributed to collection and handling stress rather than to the tagging itself. Tags applied to the web surface between the fourth and fifth dactyl of the hindfoot appeared to have the highest retention rates, while adipose eyelid tagging had high tag readability but a high loss rate. We conclude that in soft-shelled turtles, the most suitable region for VIFE tagging is on the web surface between the fourth and fifth dactyls of the hindfoot.
Kim, Bori,Park, Youn Duk,Min, Kyoungho,Lee, Jin Hong,Hwang, Seung Sang,Hong, Soon Man,Kim, Bong Hoon,Kim, Sang Ouk,Koo, Chong Min WILEY‐VCH Verlag 2011 Advanced Functional Materials Vol.21 No.17
<P>Without any contact with electrodes, nanostructured elastomers can electrically actuate, as reported by Sang Ouk Kim, Chong Min Koo, and co‐workers on page 3242. The cover image illustrates the electric actuation of nanostructured materials, dominated by a true electrostriction mechanism. The degree of surface polarization on the interface between mismatched dielectrics is expressed by the surface color of the dispersion phases. </P>
Lee, Ju Min,Kwon, Byoung‐,Hwa,Park, Hyung Il,Kim, Hoyeon,Kim, Min Gyu,Park, Ji Sun,Kim, E Su,Yoo, Seunghyup,Jeon, Duk Young,Kim, Sang Ouk WILEY‐VCH Verlag 2013 ADVANCED MATERIALS Vol.25 No.14
<P><B>The incorporation of InP quantum‐dot/N‐doped multiwalled carbon nanotube (QD:NCNT) nanohybrids</B> in the active layer of poly(3‐hexylthiophene)/indene−C<SUB>60</SUB> bisadduct (P3HT/ICBA) bulk‐heterojuction solar cells enhances <I>V</I><SUB>OC</SUB> and <I>J</I><SUB>SC</SUB>. The QDs encourage exciton dissociation by promoting electron transfer, while the NCNTs enhance the transport of the separated electrons and eventual charge collection. Such a synergistic effect successfully improves the power conversion efficiency (PCE) from 4.68% (reference cells) to 6.11%.</P>
Whole-exome sequencing identifies recurrent <i>AKT1</i> mutations in sclerosing hemangioma of lung
Jung, Seung-Hyun,Kim, Min Sung,Lee, Sung-Hak,Park, Hyun-Chun,Choi, Hyun Joo,Maeng, Leeso,Min, Ki Ouk,Kim, Jeana,Park, Tae In,Shin, Ok Ran,Kim, Tae-Jung,Xu, Haidong,Lee, Kyo Young,Kim, Tae-Min,Song, Sa National Academy of Sciences 2016 PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF Vol.113 No.38
<P>Pulmonary sclerosing hemangioma (PSH) is a benign tumor with two cell populations (epithelial and stromal cells), for which genomic profiles remain unknown. We conducted exome sequencing of 44 PSHs and identified recurrent somatic mutations of AKT1 (43.2%) and beta-catenin (4.5%). We used a second subset of 24 PSHs to confirm the high frequency of AKT1 mutations (overall 31/68, 45.6%; p.E17K, 33.8%) and recurrent beta-catenin mutations (overall 3 of 68, 4.4%). Of the PSHs without AKT1 mutations, two exhibited AKT1 copy gain. AKT1 mutations existed in both epithelial and stromal cells. In two separate PSHs from one patient, we observed two different AKT1 mutations, indicating they were not disseminated but independent arising tumors. Because the AKT1 mutations were not found to co-occur with beta-catenin mutations (or any other known driver alterations) in any of the PSHs studied, we speculate that this may be the single-most common driver alteration to develop PSHs. Our study revealed genomic differences between PSHs and lung adenocarcinomas, including a high rate of AKT1 mutation in PSHs. These genomic features of PSH identified in the present study provide clues to understanding the biology of PSH and for differential genomic diagnosis of lung tumors.</P>
Park, Ji Sun,Lee, Ju Min,Hwang, Sun Kak,Lee, Sun Hwa,Lee, Hyun-Jung,Lee, Bo Ram,Park, Hyung Il,Kim, Ji-Seon,Yoo, Seunghyup,Song, Myoung Hoon,Kim, Sang Ouk The Royal Society of Chemistry 2012 Journal of materials chemistry Vol.22 No.25
<P>Metal oxide charge transport layers are widely used to promote the interfacial charge transport of organic optoelectronics. Nevertheless, frequently used wide-bandgap metal oxides with low electrical conductivities reveal inherent limitations in the charge transport enhancement. We present the remarkable electro-conductivity enhancement of solution processable ZnO charge transport layers upon dispersing a tiny amount (less than 0.1 wt%) of chemically doped CNTs and the corresponding device performance improvement of light-emitting diodes (OLEDs). Using various undoped or doped CNTs, whose work function was systematically tuned by substitutional doping of electron deficient B or electron rich N,N-doped CNT (N-CNT), the composite showed a lowered work function matching well with the conduction band of ZnO. Consequently, the ZnO/N-CNT nanocomposite transport layer with 0.08 wt% N-CNT showed a five-fold enhancement of electron mobility, while maintaining the intrinsic bandgap energy levels, optical transparency and solution processability of pure ZnO. The inverted OLEDs employing ZnO/N-CNT nanocomposite electron transport layers could facilitate well-balanced electron–hole injection and, thus, more than two-fold enhancement of maximum luminance (from 21 000 cd m<SUP>−2</SUP> at 14.6 V to 46 100 cd m<SUP>−2</SUP> at 14.0 V) and efficiency (from 6.9 cd A<SUP>−1</SUP> at 13.4 V to 14.3 cd A<SUP>−1</SUP> at 13.6 V). This highly effective charge mobility enhancement enabled by work function tunable, chemically doped CNTs would be beneficial for various organic and inorganic charge transport materials with different energy levels.</P> <P>Graphic Abstract</P><P>The ZnO/N-doped CNT nanocomposite electron transport layer enabled balanced electron and hole injection and improved device performance in inverted organic light-emitting diodes. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c2jm30710c'> </P>
Park, Young-Ouk,Myung, Sung-Woon,Kook, Min-Suk,Jung, Sang-Chul,Kim, Byung-Hoon American Scientific Publishers 2016 Journal of nanoscience and nanotechnology Vol.16 No.2
<P>In this study, 3D polycaprolactone (PCL) scaffolds were fabricated by 3D printing technique. The macro/nano morphology of 3D PCL scaffolds surface was etched with oxygen plasma. Acrylic acid (AA) plasma-polymerization was performed to functionalize the macro/nano surface with carboxyl groups and then collagen was immobilized with plasma-polymerized 3D PCL scaffolds. After O-2 plasma and AA plasma-polymerization, contact angles were decreased. The FE-SEM and AFM results showed that O-2 plasma is increased the surface roughness. The MTT assay results showed that proliferation of the M3CT3-E1 cells increased on the oxygen plasma treated and collagen immobilized 3D PCL scaffolds.</P>
High Performance Organic Photovoltaics with Plasmonic-Coupled Metal Nanoparticle Clusters
Park, Hyung Il,Lee, Seunghoon,Lee, Ju Min,Nam, Soo Ah,Jeon, Taewoo,Han, Sang Woo,Kim, Sang Ouk American Chemical Society 2014 ACS NANO Vol.8 No.10
<P>Performance enhancement of organic photovoltaics using plasmonic nanoparticles has been limited without interparticle plasmon coupling. We demonstrate high performance organic photovoltaics employing gold nanoparticle clusters with controlled morphology as a plasmonic component. Near-field coupling at the interparticle gaps of nanoparticle clusters gives rise to strong enhancement in localized electromagnetic field, which led to the significant improvement of exciton generation and dissociation in the active layer of organic solar cells. A power conversion efficiency of 9.48% is attained by employing gold nanoparticle clusters at the bottom of the organic active layer. This is one of the highest efficiency values reported thus far for the single active layer organic photovoltaics.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/ancac3/2014/ancac3.2014.8.issue-10/nn503508p/production/images/medium/nn-2014-03508p_0006.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nn503508p'>ACS Electronic Supporting Info</A></P>