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Kim, Bichseam,Kim, Nahui,Kim, Jun Young,Kim, Byung Sup,Jung, Hee-Jeong,Hwang, Indoek,Noua, Ill-Sup,Sim, Sung-Chur,Park, Younghoon,Belzile, F. Canadian Science Publishing 2016 Genome Vol.59 No.3
<P> Fusarium crown and root rot is a severe fungal disease of tomato caused by Fusarium oxysporum f. sp. radicis-lycopersici (FORL). In this study, the genomic location of the FORL-resistance locus was determined using a set of molecular markers on chromosome 9 and an F2 population derived from FORL-resistant inbred ‘AV107-4’ (Solanum lycopersicum) × susceptible ‘L3708’ (Solanum pimpinellifolium). Bioassay performed using Korean FORL strain KACC 40031 showed single dominant inheritance of FORL resistance in the F2 population. In all, 13 polymerase chain reaction-based markers encompassing approximately 3.6-72.0 Mb of chromosome 9 were developed based on the Tomato-EXPEN 2000 map and SolCAP Tomato single nucleotide polymorphism array analysis. These markers were genotyped on 345 F2 plants, and the FORL-resistance locus was found to be present on a pericentromeric region of suppressed chromosomal recombination in chromosome 9. The location of the FORL-resistance locus was further confirmed by testing these markers against diverse commercial tomato and stock cultivars resistant to FORL. A restriction fragment length polymorphism marker, PNU-D4, located at approximately 6.1 Mb of chromosome 9 showed the highest match with the resistance locus and was used for conducting high-resolution melting analysis for marker-assisted selection of FORL resistance. </P>
Ferromagnetism in single crystal and nanocomposite Sr(Ti,Fe)O<sub>3</sub> epitaxial films
Kim, Hyun-Suk,Bi, Lei,Kim, Dong Hun,Yang, Dae-Jin,Choi, Yoon Jeong,Lee, Jung Woo,Kang, Jeung Ku,Chang Park, Yun,Dionne, Gerald F.,Ross, Caroline A. Royal Society of Chemistry 2011 Journal of materials chemistry Vol.21 No.28
<P>The ferromagnetic properties and electrical leakage current of single-phase SrTi<SUB>1−<I>x</I></SUB>Fe<SUB><I>x</I></SUB>O<SUB>3</SUB> (STF) perovskite films are compared for two different samples: a single-crystal film with a (100) orientation, and a ‘doubly oriented’ nanocomposite film consisting of (110)-oriented nanopillars embedded homoepitaxially in a (100)-oriented matrix. The STF films contain mixed valence Fe ions, with a lower average valence state present in the single crystal film. The films are under an in-plane compressive strain, and exhibit an out-of-plane magnetic easy axis due to magnetoelastic effects. The nanopillars in the double-epitaxial STF films act as single ferromagnetic domains, whereas the single-crystal films show a maze-like domain structure. Composition fluctuations seen in single-crystal films are suppressed in the double-epitaxial structure, which has a lower electrical leakage current. First-principles modeling supports a tendency for Fe ions to occupy adjacent sites. The correlations between the valence state and distribution of the Fe ions, the microstructure, and the magnetic and electrical properties provide a general method of tailoring the properties of perovskite films, which have immense technological value in a range of multiferroic, ferromagnetic, optical, spintronic and hybrid devices.</P> <P>Graphic Abstract</P><P>The ferromagnetic and electrical properties of SrTi<SUB>1−<I>x</I></SUB>Fe<SUB><I>x</I></SUB>O<SUB>3</SUB> films grown on buffered Si are characterized for both (100)-oriented single crystal films and double-epitaxial films consisting of (110)-oriented nanopillars embedded homoepitaxially in a (100)-oriented matrix. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c1jm11286d'> </P>
Genome Sequence of the Hemolytic-Uremic Syndrome-Causing Strain Escherichia coli NCCP15647
Jeong, H.,Zhao, F.,Igori, D.,Oh, K.-H.,Kim, S.-Y.,Kang, S. G.,Kim, B. K.,Kwon, S.-K.,Lee, C. H.,Song, J. Y.,Yu, D. S.,Park, M.-S.,Cho, S.-H.,Kim, J. F. American Society for Microbiology 2012 Journal of Bacteriology Vol.194 No.14
Genome Sequence of the Shiga Toxin-Producing Escherichia coli Strain NCCP15657
Kim, B. K.,Song, G. C.,Hong, G. H.,Seong, W.-K.,Kim, S.-Y.,Jeong, H.,Kang, S. G.,Kwon, S.-K.,Lee, C. H.,Song, J. Y.,Yu, D. S.,Park, M.-S.,Cho, S.-H.,Kim, J. F. American Society for Microbiology 2012 Journal of Bacteriology Vol.194 No.14
Ogata, Alana F.,Song, Seok-Won,Cho, Su-Ho,Koo, Won-Tae,Jang, Ji-Soo,Jeong, Yong Jin,Kim, Min-Hyeok,Cheong, Jun Young,Penner, Reginald M.,Kim, Il-Doo American Chemical Society 2018 ANALYTICAL CHEMISTRY - Vol.90 No.15
<P>A new type of chemiresistor, the impedance-transduced chemiresistor (ITCR), is described for the rapid analysis of glucose. The ITCR exploits porous, high surface area, fluorine-doped carbon nanofibers prepared by electrospinning of fluorinated polymer nanofibers followed by pyrolysis. These nanofibers are functionalized with a boronic acid receptor and stabilized by Nafion to form the ITCR channel for glucose detection. The recognition and binding of glucose by the ITCR is detected by measuring its electrical impedance at a single frequency. The analysis frequency is selected by measuring the signal-to-noise (<I>S</I>/<I>N</I>) for glucose detection across 5 orders of magnitude, evaluating both the imaginary and real components of the complex impedance. On the basis of this analysis, an optimal frequency of 13 kHz is selected for glucose detection, yielding an <I>S</I>/<I>N</I> ratio of 60-100 for [glucose] = 5 mM using the change in the total impedance, Δ<I>Z</I>. The resulting ITCR glucose sensor shows a rapid analysis time (<8 s), low coefficient of variation for a series of sensors (<10%), an analysis range of 50 μM to 5 mM, and excellent specificity versus fructose, ascorbic acid, and uric acid. These metrics for the ITCR are obtained using a sample size as small as 5 μL.</P> [FIG OMISSION]</BR>
Genome Sequence of the Plant Growth-Promoting Rhizobacterium Bacillus sp. Strain JS
Song, J. Y.,Kim, H. A.,Kim, J.-S.,Kim, S.-Y.,Jeong, H.,Kang, S. G.,Kim, B. K.,Kwon, S.-K.,Lee, C. H.,Yu, D. S.,Kim, B. S.,Kim, S.-H.,Kwon, S. Y.,Kim, J. F. American Society for Microbiology 2012 Journal of Bacteriology Vol.194 No.14
Hazardous materials in buildings
Kim, Jeong Tai,Yu, Chuck W. F. Sage Publications 2014 Indoor and Built Environment Vol.23 No.1
<P>The purpose of this paper is to review the types of building materials that could present a hazardous risk to health of building occupants. The review is necessary as many countries including Korea and the UK have a policy target to make building sustainable and air-tight; therefore a strategy and guide is needed to address the possible hazards that could be found in existing structures of many buildings. For new buildings, the assessment should be at the beginning of building conception, which should be extended to all stages of construction, and the potential hazard should be registered in record to inform the future refurbishment procedures and end-of-life management of the building, for disposal and re-use of materials. The assessment of hazardous materials should be an important aspect of the green building certification such as those being developed in Korea. Various types of hazardous building materials are described. Guidance is provided to encourage precaution and remediation of risks when handling these materials during construction or refurbishment or with materials already in place in existing buildings. The good practice should include a checklist procedure including: survey, assess condition, assess presence, identify and analyse, record, evaluate, and finally develop a plan strategy for prevention and possible remediation.</P>
The use of JIP test to evaluate drought-tolerance of transgenic rice overexpressing OsNAC10
Redillas, Mark C.F.R.,Strasser, Reto J.,Jeong, Jin-Seo,Kim, Youn-Shic,Kim, Ju-Kon The Korean Society of Plant Biotechnology 2011 Plant biotechnology reports Vol.5 No.2
In this study, the JIP test was exploited to assess drought-tolerance of transgenic rice overexpressing OsNAC10. Two types of promoters, RCc3 (root-specific) and GOS2 (constitutive), were used to drive the transcription factor OsNAC10, a gene involved in diverse functions including stress responses. Three-month-old plants were exposed to drought for 1 week and their fluorescence kinetics was evaluated. Our results showed that drought-treated non-transgenic plants (NT) have higher fluorescence intensity at the J phase (2 ms) compared to transgenic plants, indicating a decline in electron transport beyond the reduced plastoquinone ($Q_A^-$). As manifested by negative L bands, transgenic plants also showed higher energetic connectivity and stability over NT plants under drought conditions. Also, the pool size of the end electron acceptor at the photosystem I was reduced more in NT than in transgenic plants under drought conditions. Furthermore, the transgenic plants had higher $PI_{total}$, a combined parameter that reflects all the driving forces considered in JIP test, than NT plants under drought conditions. In particular, the $PI_{total}$ of the RCc3:OsNAC10 plants was higher than that of NT plants, which was in good agreement with their differences in grain yield. Thus, the JIP test proved to be practical for evaluating drought-tolerance of transgenic plants.