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김웅수(Woongsoo Kim),송일석(Ilseok Song),신종현(Jonghyun Shin),오천환(Cheonhwan Oh),김은아(Eunah Kim),김극태(Keugtae Kim),김현자(Hyunja Kim),김종수(Kim, Jongsu Kim),최윤호(Yunho Choi) 한국환경보건학회 2017 한국환경보건학회지 Vol.43 No.3
Objectives: The pollution status of heavy metals within the soil was investigated with an aim to establishing a sustainable soil environment within parks and amusement facilities installed in urban areas of Gyeonggi–do Province. Methods: As sampling sites, 14 locations were selected from a city with a number of factories near a residential area, a residential area, and a children s park in a city with mixed green areas. Seven kinds of heavy metals, including Cd, Pb, and Hg, and the pH of soil were analyzed three times by inductively coupled plasma optical emission spectroscopy (ICP-OES) and atomic absorption spectrometer (AAS). Results: In this study, the pH of the samples from the residential park and industrial park showed 5.7-6.5 and 5.9-7.0, respectively. The overall mean concentration (mg/kg) of heavy metals was Zn (132.8), Ni (73.0), Cu (47.4), Pb (35.9), As (4.84), Cd (0.39), and Hg (0.07), indicating that these concentrations of heavy metals were lower than those for the area 1 standard of soil pollution concern criteria. In addition, the sampling sites in the residential area and the industrial area also showed the same tendency for concentration distribution. Conclusions: We found that the soil pollution class (SPC) of some spots were over 200, which are third and fourth classes. In order to manage a sustainable soil environment in a city park, it is suggested that local governments, the management bodies for these parks, need to manage, supervise, and investigate soil pollution and quickly replace contaminated soil.
Kim, Yeong-Eun,Oh, Seohee,Kim, Seji,Kim, Onnuri,Kim, Jin,Han, Sang Woo,Lee, Yunho American Chemical Society 2015 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.137 No.13
<P>Reversible transformations are observed between a phosphide-nickel(II) alkoxide and a phosphinite-nickel(0) species via a P–O bond formation coupled with a 2-e<SUP>–</SUP> redox change at the nickel center. In the forward reaction, the nickel(0) dinitrogen species (PP<SUP>OMe</SUP>P)Ni(N<SUB>2</SUB>) (<B>2</B>) and {(PP<SUP>OMe</SUP>P)Ni}<SUB>2</SUB>(μ-N<SUB>2</SUB>) (<B>3</B>) were formed from the reaction of (PPP)NiCl (<B>1</B>) with a methoxy anion. In the backward reaction, a (PPP)Ni(II) moiety was regenerated from the CO<SUB>2</SUB> reaction of <B>3</B> with the concomitant formation of a methyl carbonate ligand in (PPP)Ni(OCOOMe) (<B>7</B>). Thus, unanticipated metal–ligand cooperation involving a phosphide based ligand is reported.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jacsat/2015/jacsat.2015.137.issue-13/ja513112r/production/images/medium/ja-2014-13112r_0006.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ja513112r'>ACS Electronic Supporting Info</A></P>
Kim, YunHo,Choi, Chunghyeon,Kumar, Sarath Kumar Sathish,Kim, Chun-Gon,Kim, Sun-Won,Lim, Jae Hyuk Elsevier Science Ltd 2017 Composites Applied science and manufacturing Vol. No.
<P><B>Abstract</B></P> <P>The properties of fiber reinforced composites are mainly determined by the fraction of reinforcement and matrix. Thus, to design a system based on composite materials, it is vital to carefully measure the volume fractions of the composites with a proper method. Digestion by strong acid or ignition at high temperature in an oxidizing environment are conventional for measuring content fractions. In essence, these methods assume that the reinforcement does not lose weight by digestion or ignition. However, by neglecting reported vulnerable oxidization characteristics of carbon fiber, these conventional methods result in inaccurate fiber volume fractions of carbon fiber/epoxy composites. In this study, an effective and accurate method, having only 2 steps in measuring process and 1.5%p maximum error, for determining the fiber volume fractions of two different PAN (Polyacylonitrile)-based carbon fiber reinforced composites via thermo-gravimetric analysis was developed and subsequently verified using the results from 80 microscopic images.</P>
Ultrasound Imaging of the Trunk Muscles in Acute Stroke Patients and Relations With Balance Scales
Yunho Kim,Jeeyoung Kim,Heesung Nam,Hyun Dong Kim,Mi Ja Eom,Sang Hoon Jung,Nami Han 대한재활의학회 2020 Annals of Rehabilitation Medicine Vol.44 No.4
Objective To examine the correlation between ultrasonographic trunk muscle parameters and balance scales in mild acute stroke patients. Methods A total of 55 stroke patients with hemiparesis and motor power grade ≥4 in the manual motor test were included. The Scale for the Assessment and Rating of Ataxia (SARA), Berg Balance Scale (BBS), Timed Up and Go Test (TUG), and Trunk Control Test (TCT) were used to evaluate patient balance function. Ultrasonographic parameters were measured on both non-paretic and paretic sides of the rectus abdominis, external oblique, internal oblique, transversus abdominis, and erector spinae muscles. Resting thickness and contraction thickness were measured in all muscles, and contractility and contractility ratio were calculated based on measured thicknesses. The differences between paretic and non-paretic muscle parameters, and the correlation between ultrasonographic parameters and balance scales were analyzed. Stroke patients were divided into two groups according to their fall risk. Ultrasonographic measurements between the two groups were compared. Results All muscles’ contraction thickness and contractility were significantly different between paretic and non-paretic sides (p<0.001). Contractility ratios of all trunk muscles showed a significant correlation with SARA, BBS, TUG, and TCT (p<0.05). Contractility ratios of all muscles were significantly different between high- and low-risk fall groups (p<0.05). Conclusion The contractility ratio in stroke patients reflects their balance disturbance and fall risk and it may serve as a new parameter for ultrasound imaging of trunk muscles.
Molecular and genomic features of <i>Mycobacterium bovis</i> strain 1595 isolated from Korean cattle
Kim, Narae,Jang, Yunho,Kim, Jin Kyoung,Ryoo, Soyoon,Kwon, Ka Hee,Kim, Miso,Kang, Shin Seok,Byeon, Hyeon Seop,Lee, Hee Soo,Lim, Young-Hee,Kim, Jae-Myung The Korean Society of Veterinary Science 2017 Journal of Veterinary Science Vol.18 No.-
<P>The aim of this study was to investigate the molecular characteristics and to conduct a comparative genomic analysis of <I>Mycobacterium</I> (<I>M.</I>) <I>bovis</I> strain 1595 isolated from a native Korean cow. Molecular typing showed that <I>M. bovis</I> 1595 has spoligotype SB0140 with mycobacterial interspersed repetitive units-variable number of tandem repeats typing of 4-2-5-3-2-7-5-5-4-3-4-3-4-3, representing the most common type of <I>M. bovis</I> in Korea. The complete genome sequence of strain 1595 was determined by single-molecule real-time technology, which showed a genome of 4351712 bp in size with a 65.64% G + C content and 4358 protein-coding genes. Comparative genomic analysis with the genomes of <I>Mycobacterium tuberculosis</I> complex strains revealed that all genomes are similar in size and G + C content. Phylogenetic analysis revealed all strains were within a 0.1% average nucleotide identity value, and MUMmer analysis illustrated that all genomes showed positive collinearity with strain 1595. A sequence comparison based on BLASTP analysis showed that <I>M. bovis</I> AF2122/97 was the strain with the greatest number of completely matched proteins to <I>M. bovis</I> 1595. This genome sequence analysis will serve as a valuable reference for improving understanding of the virulence and epidemiologic traits among <I>M. bovis</I> isolates in Korea.</P>