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Baeg, Kang‐,Jun,Khim, Dongyoon,Jung, Soon‐,Won,Kang, Minji,You, In‐,Kyu,Kim, Dong‐,Yu,Facchetti, Antonio,Noh, Yong‐,Young WILEY‐VCH Verlag 2012 Advanced Materials Vol.24 No.40
<P>On page 5433, Yong‐Young Noh, Antonio Facchetti, Kang‐Jun Baeg, and co‐workers report that high performance ambipolar complementary inverters and ring oscillators are provided by a remarkable enhancement of both hole injection and transport for n‐channel dominant N2200 OFETs. The significant enhancement of hole mobility in N2200 OTFTs is attributed to the strong dipoles in fluorinated high‐k gate dielectric blend of P(VDF‐TrFE):PMMA. </P>
Outcome of nonsurgical retreatment and endodontic microsurgery: a meta-analysis.
Kang, Minji,In Jung, Hoi,Song, Minju,Kim, Sue Youn,Kim, Hyeon-Cheol,Kim, Euiseong Springer 2015 Clinical oral investigations Vol.19 No.3
<P>The purpose of this study was to evaluate and compare the clinical and radiographic outcomes of nonsurgical endodontic retreatment and endodontic microsurgery by a meta-analysis.</P>
Prevalence of Mycobacterium Bovis among Human Tuberculosis Specimens in South Korea
( Minji Kang ),( Ho Won Kim ),( A-reum Yu ),( Jeong Seong Yang ),( Hyeonji Kim ),( Jong-seok Kim ),( Jake Whang ),( Seung Heon Lee ) 대한결핵 및 호흡기학회 2020 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.128 No.0
Background Mycobacterium bovis is a zoonotic pathogen that can infect both humans and animals as tuberculosis (TB). Unlikely other Mycobacterium tuberculosis complex (MTBC) members, M. bovis is intrinsically resistant to pyrazinamide as one of the first-line anti-tuberculosis drugs. The World Health Organization reported that an estimated 143,000 new cases of these zoonotic TB occurred globally in 2018. Transmission is mostly through close contacts with infected cattle or consumption of unpasteurized dairy products. Nevertheless, M. bovis infected patients are not distinguished among TB patients, and even while many epidemiologic reports on M. bovis infection have been published in lots of countries, there has never been an attempt to identify M. bovis in Korea. Methods A total of 160 MTBC clinical isolates having pyrazinamide resistance was provided from Korean Mycobacteria Resource Center of Korean Institute of Tuberculosis from 2008 to 2019. We cultured on Middlebrook 7H10 medium and then genomic DNA of mycobacterial isolates was extracted using the boiling Method. Multiplex PCR assay was performed by using the commercial kit. Results We reviewed data on the proportion of M. bovis in human samples published in other 18 countries. Among these, the highest percentage is 30.20 % in Mexico. In contrast, the lowest percentage is 0.13 % in Ethiopia. Our Results have not yet showed any detection as M. bovis among these 107 MTBC isolates in Korea. Conclusions In Conclusion, we reviewed the proportion of M. bovis isolated from human and then we conducted the first differentiation of M. bovis from MTBC isolates in Korea. These Results show that the system of Korean livestock industry is very tightly controlling the infection of M. bovis. However, apart from that, it is also important to continually monitor another route of TB and to complete M. bovis infection statistics through more tests.
Kang, Minji,Seo, Jang Kyun,Choi, Hoseong,Choi, Hong Soo,Kim, Kook Hyung The Korean Society of Plant Pathology 2016 Plant Pathology Journal Vol.32 No.1
The infectious full-length cDNA clone of zucchini yellow mosaic virus (ZYMV) isolate PA (pZYMV-PA), which was isolated from pumpkin, was constructed by utilizing viral transcription and processing signals to produce infectious in vivo transcripts. Simple rub-inoculation of plasmid DNAs of pZYMV-PA was successful to cause infection of zucchini plants (Cucurbita pepo L.). We further engineered this infectious cDNA clone of ZYMV as a viral vector for systemic expression of heterologous proteins in cucurbits. We successfully expressed two reporter genes including gfp and bar in zucchini plants by simple rub-inoculation of plasmid DNAs of the ZYMV-based expression constructs. Our method of the ZYMV-based viral vector in association with the simple rub-inoculation provides an easy and rapid approach for introduction and evaluation of heterologous genes in cucurbits.
Kang, Minji,Baeg, Kang‐,Jun,Khim, Dongyoon,Noh, Yong‐,Young,Kim, Dong‐,Yu WILEY‐VCH Verlag 2013 Advanced Functional Materials Vol.23 No.28
<P><B>Abstract</B></P><P>The effects of using a blocking dielectric layer and metal nanoparticles (NPs) as charge‐trapping sites on the characteristics of organic nano‐floating‐gate memory (NFGM) devices are investigated. High‐performance NFGM devices are fabricated using the n‐type polymer semiconductor, poly{[<I>N</I>,<I>N</I>′‐bis(2‐octyldodecyl)‐naphthalene‐1,4,5,8‐bis(dicarboximide)‐2,6‐diyl]‐alt‐5,5′‐(2,2′‐bithiophene)} (P(NDI2OD‐T2)), and various metal NPs. These NPs are embedded within bilayers of various polymer dielectrics (polystyrene (PS)/poly(4‐vinyl phenol) (PVP) and PS/poly(methyl methacrylate) (PMMA)). The P(NDI2OD‐T2) organic field‐effect transistor (OFET)‐based NFGM devices exhibit high electron mobilities (0.4–0.5 cm<SUP>2</SUP> V<SUP>−1</SUP> s<SUP>−1</SUP>) and reliable non‐volatile memory characteristics, which include a wide memory window (≈52 V), a high on/off‐current ratio (<I>I</I><SUB>on</SUB>/<I>I</I><SUB>off</SUB> ≈ 10<SUP>5</SUP>), and a long extrapolated retention time (>10<SUP>7</SUP> s), depending on the choice of the blocking dielectric (PVP or PMMA) and the metal (Au, Ag, Cu, or Al) NPs. The best memory characteristics are achieved in the ones fabricated using PMMA and Au or Ag NPs. The NFGM devices with PMMA and spatially well‐distributed Cu NPs show quasi‐permanent retention characteristics. An inkjet‐printed flexible P(NDI2OD‐T2) 256‐bit transistor memory array (16 × 16 transistors) with Au‐NPs on a polyethylene naphthalate substrate is also fabricated. These memory devices in array exhibit a high <I>I</I><SUB>on</SUB>/<I>I</I><SUB>off</SUB> (≈10<SUP>4 ± 0.85</SUP>), wide memory window (≈43.5 V ± 8.3 V), and a high degree of reliability.</P>
Establishment of an Agrobacterium-mediated Inoculation System for Cucumber Green Mottle Mosaic Virus
Kang, Minji,Seo, Jang-Kyun,Song, Dami,Choi, Hong-Soo,Kim, Kook-Hyung The Korean Society of Plant Pathology 2015 Plant Pathology Journal Vol.31 No.4
The infectious full-length cDNA clones of Cucumber green mottle mosaic virus (CGMMV) isolates KW and KOM, which were isolated from watermelon and oriental melon, respectively, were constructed under the control of the cauliflower mosaic virus 35S promoter. We successfully inoculated Nicotiana benthamiana with the cloned CGMMV isolates KW and KOM by Agrobacterium-mediated infiltration. Virulence and symptomatic characteristics of the cloned CGMMV isolates KW and KOM were tested on several indicator plants. No obvious differences between two cloned isolates in disease development were observed on the tested indicator plants. We also determined full genome sequences of the cloned CGMMV isolates KW and KOM. Sequence comparison revealed that only four amino acids (at positions 228, 699, 1212, and 1238 of the replicase protein region) differ between the cloned isolates KW and KOM. A previous study reported that the isolate KOM could not infect Chenopodium amaranticolor, but the cloned KOM induced chlorotic spots on the inoculated leaves. When compared with the previously reported sequence of the original KOM isolate, the cloned KOM contained one amino acid mutation (Ala to Thr) at position 228 of the replicase protein, suggesting that this mutation might be responsible for induction of chlorotic spots on the inoculated leaves of C. amaranticolor.
Kang, Minji,Kim, Sungwhan,Kim, Heejin,Song, Youngjun,Jung, Dongwook,Kang, Sunah,Seo, Ji-Hun,Nam, Sohee,Lee, Yan American Chemical Society 2019 ACS APPLIED MATERIALS & INTERFACES Vol.11 No.8
<P>Quorum sensing (QS) inhibitor-based therapy is an attractive strategy to inhibit bacterial biofilm formation without excessive induction of antibiotic resistance. Thus, we designed Ca<SUP>2+</SUP>-binding poly(lactide-<I>co</I>-glycolide) (PLGA) microparticles that can maintain a sufficient concentration of QS inhibitors around hydroxyapatite (HA) surfaces in order to prevent biofilm formation on HA-based dental or bone tissues or implants and, therefore, subsequent pathogenesis. Poly(butyl methacrylate-<I>co</I>-methacryloyloxyethyl phosphate) (PBMP) contains both Ca<SUP>2+</SUP>-binding phosphomonoester groups and PLGA-interacting butyl groups. The PBMP-coated PLGA (PLGA/PBMP) microparticles exhibited superior adhesion to HA surfaces without altering the sustained release properties of uncoated PLGA microparticles. PLGA/PBMP microparticle-encapsulating furanone C-30, a representative QS inhibitor, effectively inhibited the growth of <I>Streptococcus mutans</I> and its ability to form biofilms on HA surface for prolonged periods of up to 100 h, which was much longer than either furanone C-30 in its free form or when encapsulated in noncoated PLGA microparticles.</P> [FIG OMISSION]</BR>
Kang, Minji,Kim, Yeong-A.,Yun, Jin-Mun,Khim, Dongyoon,Kim, Jihong,Noh, Yong-Young,Baeg, Kang-Jun,Kim, Dong-Yu The Royal Society of Chemistry 2014 Nanoscale Vol.6 No.21
<P>In this study, we investigated chemically exfoliated two-dimensional (2-D) nanoflakes of molybdenum disulfide (MoS2) as charge-storing elements for use in organic multilevel memory devices (of the printed/flexible non-volatile type) based on organic field-effect transistors (OFETs) containing poly(3-hexylthiophene) (P3HT). The metallic MoS2 nanoflakes were exfoliated in 2-methoxyethanol by the lithium intercalation method and were deposited as nano-floating gates between polystyrene and poly(methyl methacrylate), used as bilayered gate dielectrics, by a simple spin-coating and low temperature (<150 C) process. In the developed OFET memory devices, electrons could be trapped/detrapped in the MoS2 nano-floating gates by modulating the charge carrier density in the active channel through gate bias control. Optimal memory characteristics were achieved by controlling the thickness and concentration of few-layered MoS2 nanoflakes, and the best device showed reliable non-volatile memory properties: a sufficient memory window of 23 V, programming-reading-erasing cycling endurance of >10(2) times, and most importantly, quasi-permanent charge-storing characteristics, i.e., a very long retention time (longer than the technological requirement of commercial memory devices (>10 years)). In addition, we successfully developed multilevel memory cells (2 bits per cell) by controlling the gate bias magnitude.</P>