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1. Mechanically enhanced graphene oxide/carboxymethyl cellulose nanofibril composite fiber as a scalable adsorbent for heavy metal removal

Author:
Kim, Seung Min,   et al.   ; Yu, Hayoung; Hong, Hye-Jin; Ko, Heung Cho; Jeong, Hyeon Su;     Show all 5 Authors
Source:
Carbohydrate polymers 2020 v.240 pp. 116348
ISSN:
0144-8617
Subject:
adsorbents; carboxymethylcellulose; coagulants; crosslinking; electrostatic interactions; graphene oxide; heavy metals; iron; lead; mechanical properties; metal ions; moieties; nanofibers; surface area
Abstract:
... Recently, graphene oxide(GO) has gained much attention for heavy metal removal due to its high surface area and lots of functional groups on the surface. However, GO itself in powder form is far away from practical adsorbents because it remains dispersed in liquid phase which causes difficulty in the separation from effluent. In this study, GO/carboxymethyl cellulose nanofibril (CMCNF) composite f ...
DOI:
10.1016/j.carbpol.2020.116348

2. One-pot direct conversion of levulinic acid into high-yield valeric acid over a highly stable bimetallic Nb-Cu/Zr-doped porous silica catalyst

Author:
Kim, Seung Min,   et al.   ; Karanwal, Neha; Verma, Deepak; Butolia, Paresh; Kim, Jaehoon;     Show all 5 Authors
Source:
Green chemistry 2020 v.22 no.3 pp. 766-787
ISSN:
1463-9270
Subject:
Lewis acids; acidity; adsorption; alcohols; biofuels; biorefining; catalysts; catalytic activity; copper; esters; green chemistry; hydrogen; hydrogenation; leaching; levulinic acid; silica; valeric acid
Abstract:
... The direct conversion of levulinic acid (LA) to valeric biofuel is highly promising for the development of biorefineries. Herein, LA is converted into valeric acid (VA) via one-pot direct cascade conversion over non-noble metal-based Nb-doped Cu on Zr-doped porous silica (Nb-Cu/ZPS). Under mild reaction conditions (150 °C and 3.0 MPa H₂ for 4 h), LA was completely converted into VA in high yield ( ...
DOI:
10.1039/c9gc03516h

3. Leaf-associated microbiota on perilla (Perilla frutescens var. frutescens) cultivated in South Korea to detect the potential risk of food poisoning

Author:
Kim, Seung Min,   et al.   ; Jeon, Da-young; Yum, Su-jin; Seo, Dong Woo; Jeong, Hee Gon;     Show all 5 Authors
Source:
Food research international 2019 v.126 pp. 108664
ISSN:
0963-9969
Subject:
Acinetobacter lwoffii; Klebsiella pneumoniae; Perilla frutescens var. frutescens; Sphingomonas; Staphylococcus aureus; bacterial communities; food safety; foodborne illness; genes; leaves; microbial load; microbiome; microorganisms; pathogens; prediction; quantitative polymerase chain reaction; reverse transcriptase polymerase chain reaction; ribosomal RNA; South Korea
Abstract:
... Perilla (Perilla frutescens) is a commonly consumed herb with various health benefits in Asia. However, the risks of food-borne illness owing to the presence of pathogens on perilla leaves have not been evaluated. In this study, we evaluated the microbiota of perilla leaves harvested in South Korea using Illumina MiSeq sequencing of the 16S rRNA gene. In total, 2,743,003 sequencing reads were obta ...
DOI:
10.1016/j.foodres.2019.108664

4. Mathematical model for the dynamic mechanical behavior of carbon nanotube yarn in analogy with hierarchically structured bio-materials

Author:
Kim, Seung Min,   et al.   ; Park, Junbeom; Lee, Jaegeun; Lee, Dong-Myeong; Lee, Sung-Hyun; Jeong, Hyeon Su; Lee, Kun-Hong;     Show all 7 Authors
Source:
Carbon 2019 v.152 pp. 151-158
ISSN:
0008-6223
Subject:
carbon; carbon nanotubes; mathematical models; mechanical properties
Abstract:
... The mechanical behaviors of carbon nanotube yarn (CNTY) can be described as collective mechanical behaviors of the components that comprise its hierarchical structures. The internal structures and mechanical behaviors of CNTYs closely resemble those of bio-materials, so we developed a simple mathematical model inspired by the mechanical behaviors of bio-materials to fully describe the mechanical b ...
DOI:
10.1016/j.carbon.2019.05.077

5. Rationally designed catalyst layers toward “immortal” growth of carbon nanotube forests: Fe-ion implanted substrates

Author:
Kim, Seung Min,   et al.   ; Lee, Cheol-Hun; Lee, Jaegeun; Park, Junbeom; Lee, Eunyoung; Lee, Kun-Hong;     Show all 6 Authors
Source:
Carbon 2019 v.152 pp. 482-488
ISSN:
0008-6223
Subject:
aluminum oxide; carbon; carbon nanotubes; catalysts; forest growth; forests; ions; iron; nanoparticles; vapors
Abstract:
... To increase the length and coherence of carbon nanotube (CNT) forests that are grown by chemical vapor deposition, we implant Fe ions into an Al₂O₃ supporting layer to weaken the gradient of Fe concentration when Fe catalyst layer is deposited on it. The weakened gradient slows loss of Fe catalyst nanoparticles (NPs) by sub-surface diffusion into the Al₂O₃ layer. Therefore, Fe catalyst NPs were we ...
DOI:
10.1016/j.carbon.2019.06.030

6. Modified tunicate nanocellulose liquid crystalline fiber as closed loop for recycling platinum-group metals

Author:
Kim, Seung Min,   et al.   ; Hong, Hye-Jin; Yu, Hayoung; Hong, Seungki; Hwang, Jun Yeon; Park, Min Sang; Jeong, Hyeon Su;     Show all 7 Authors
Source:
Carbohydrate polymers 2019
ISSN:
0144-8617
Subject:
adsorption; automobiles; biosorbents; biosorption; catalysts; cellulose; crystal structure; nanofibers; palladium; platinum; polyethyleneimine; recycling; wastes
Abstract:
... Rising demand and elemental rarity requires the recycling of precious metals such as platinum group elements (PGMs). Recently, biosorption has been focused on the capability of recovering precious metals, but in practice, recycling is inefficient or far away from a closed-loop material system. Here we use a polyethylenimine (PEI)-grafted spun-fiber made of cellulose nanofibril (CNF) extracted from ...
DOI:
10.1016/j.carbpol.2019.115424

7. Highly-efficient and magnetically-separable ZnO/Co@N-CNTs catalyst for hydrodeoxygenation of lignin and its derived species under mild conditions

Author:
Kim, Seung Min,   et al.   ; RanawareEqually contributed., Virendra; Verma, Deepak; Insyani, Rizki; Riaz, Asim; Kim, Jaehoon;     Show all 6 Authors
Source:
Green chemistry 2019 v.21 no.5 pp. 1021-1042
ISSN:
1463-9270
Subject:
acetosyringone; acid hydrolysis; biofuels; byproducts; carbon nanotubes; catalysts; chemical composition; cobalt; cost effectiveness; cyclohexanones; furfural; green chemistry; hydrogen; hydrogenation; hydroxymethylfurfural; lignin; nanoparticles; solvents; vanillin; wettability; zinc; zinc oxide
Abstract:
... A catalyst comprising highly-efficient and magnetically-separable bimetallic ZnO and Co nanoparticles (NPs) deposited on N-doped carbon nanotubes (ZnO/Co@N-CNTs) was synthesized by the direct calcination of the bimetallic Zn/Co zeolitic imidazolate framework (Zn/Co-ZIF) for the effective hydrogenation (HD) and hydrodeoxygenation (HD) of lignin and its derived species. During the calcination of Zn/ ...
DOI:
10.1039/c8gc03623c

8. Antibacterial Cyclic Lipopeptide Enamidonins with an Enamide-Linked Acyl Chain from a Streptomyces Species

Author:
Kim, Seung Min,   et al.   ; Son, Sangkeun; Ko, Sung-Kyun; Kim, Eun; Kim, Gil Soo; Lee, Byeongsan; Ryoo, In-Ja; Kim, Won-Gon; Lee, Jung-Sook; Hong, Young-Soo; Jang, Jae-Hyuk; Ahn, Jong Seog;     Show all 12 Authors
Source:
Journal of natural products 2018 v.81 no.11 pp. 2462-2469
ISSN:
1520-6025
Subject:
Gram-positive bacteria; Staphylococcus aureus; Streptomyces; acetone; amino acids; antibacterial properties; antibiotic resistance; derivatization; linkage groups; lipopeptides; liquid chromatography; mass spectrometry; methicillin; nuclear magnetic resonance spectroscopy; Korean Peninsula
Abstract:
... Three cyclic lipopeptides, including one known (1) and two new (2 and 3) compounds, that possess the rare enamide linkage group were discovered from Streptomyces sp. KCB14A132, an actinobacterium isolated from a soil sample collected from Jeung Island, Korea. The NMR and MS-based characterization showed that they differed in the amino acid residues in the peptide backbone. Application of Marfey’s ...
DOI:
10.1021/acs.jnatprod.8b00497

9. Ga-doped Cu/H-nanozeolite-Y catalyst for selective hydrogenation and hydrodeoxygenation of lignin-derived chemicals

Author:
Kim, Seung Min,   et al.   ; Verma, Deepak; Insyani, Rizki; Cahyadi, Handi Setiadi; Park, Jaeyong; Cho, Jae Min; Bae, Jong Wook; Kim, Jaehoon;     Show all 8 Authors
Source:
Green chemistry 2018 v.20 no.14 pp. 3253-3270
ISSN:
1463-9270
Subject:
acidity; adsorption; agricultural industry; catalysts; copper; feedstocks; fuels; gallium; green chemistry; hydrogen; hydrogenation; porous media; surface area; vanillin
Abstract:
... The development of an efficient non-sulfided and non-precious catalyst for selective hydrogenation (HD) and hydrodeoxygenation (HDO) of biomass-derived feedstocks to produce fuels and chemicals is of great interest. In this study, a highly efficient bimetallic Ga-doped Cu/H-nanozeolite-Y (Cu/HNZY) catalyst was developed for selective HD and HDO of lignin-derived species (vanillin, acetovanillone, ...
DOI:
10.1039/c8gc00629f

10. Improving the Stability of High-Performance Multilayer MoS₂ Field-Effect Transistors

Author:
Kim, Seung Min,   et al.   ; Liu, Na; Baek, Jongyeol; Hong, Seongin; Hong, Young Ki; Kim, Yang Soo; Kim, Hyun-Suk; Kim, Sunkook; Park, Jozeph;     Show all 9 Authors
Source:
ACS applied materials & interfaces 2017 v.9 no.49 pp. 42943-42950
ISSN:
1944-8252
Subject:
aluminum oxide; electric power; encapsulation; hysteresis; lighting; materials science; oxygen; sulfur; transistors
Abstract:
... In this study, we propose a method for improving the stability of multilayer MoS₂ field-effect transistors (FETs) by O₂ plasma treatment and Al₂O₃ passivation while sustaining the high performance of bulk MoS₂ FET. The MoS₂ FETs were exposed to O₂ plasma for 30 s before Al₂O₃ encapsulation to achieve a relatively small hysteresis and high electrical performance. A MoOₓ layer formed during the plas ...
DOI:
10.1021/acsami.7b16670

11. Evolution of implanted Fe ions in SiO2/Si wafer into uniformly sized catalyst particles for carbon nanotube forest growth

Author:
Kim, Seung Min,   et al.   ; Lee, Cheol-Hun; Lee, Jaegeun; Yeo, Sunmog; Lee, Sung-Hyun; Kim, Teawon; Cha, Hyeon-Gu; Eun, Youngmoo; Park, Hyun Jin; Lee, Kun-Hong;     Show all 10 Authors
Source:
Carbon 2017 v.123 pp. 122-128
ISSN:
0008-6223
Subject:
annealing; carbon; carbon nanotubes; catalysts; forest growth; ions; iron; mass spectrometry; silica; silicon; transmission electron microscopy; vapors
Abstract:
... We report the synthesis of carbon nanotube (CNT) forests with a narrow diameter distribution based on Fe ion implantation method. By annealing the Fe-implanted SiO2/Si wafer in an Ar atmosphere at 800 °C for 15 min, the Fe particles on the surface of SiO2 layer are successfully formed by the diffusion of Fe atoms from the SiO2 layer. Interestingly, the size distribution of Fe catalyst particles fo ...
DOI:
10.1016/j.carbon.2017.07.045

12. High-modulus and strength carbon nanotube fibers using molecular cross-linking

Author:
Kim, Seung Min,   et al.   ; Park, Ok-Kyung; Choi, Hoikil; Jeong, Hanbin; Jung, Yeonsu; Yu, Jaesang; Lee, Jae Kwan; Hwang, Jun Yeon; Jeong, Youngjin; Park, Chong Rae; Endo, Morinobu; Ku, Bon-Cheol;     Show all 12 Authors
Source:
Carbon 2017 v.118 pp. 413-421
ISSN:
0008-6223
Subject:
carbon fibers; carbon nanotubes; chemical bonding; crosslinking; electrical conductivity; engineering; modulus of elasticity; molecular dynamics; tensile strength
Abstract:
... We present a systematic and simple approach to produce high-strength carbon nanotube fibers (CNTFs) with electrical conductivity in the high performance range (>1000 S/cm). We studied several critical parameters to improve the mechanical properties of CNTFs by aryl cross-linking reaction. Both the molecular dynamics (MD) simulations and experimental results showed that the mechanical properties st ...
DOI:
10.1016/j.carbon.2017.03.079

13. Investigation of Thermal Stability of P2–NaxCoO2 Cathode Materials for Sodium Ion Batteries Using Real-Time Electron Microscopy

Author:
Kim, Seung Min,   et al.   ; Hwang, Sooyeon; Lee, Yongho; Jo, Eunmi; Chung, Kyung Yoon; Choi, Wonchang; Chang, Wonyoung;     Show all 7 Authors
Source:
ACS Applied Materials & Interfaces 2017 v.9 no.22 pp. 18883-18888
ISSN:
1944-8252
Subject:
cathodes; cobalt; cobalt oxide; electric power; electrochemistry; energy; heat; ions; lithium batteries; oxygen; sodium; temperature; thermal stability; transmission electron microscopy
Abstract:
... Here, we take advantage of in situ transmission electron microscopy (TEM) to investigate the thermal stability of P2-type NaₓCoO₂ cathode materials for sodium ion batteries, which are promising candidates for next-generation lithium ion batteries. A double-tilt TEM heating holder was used to directly characterize the changes in the morphology and the crystallographic and electronic structures of t ...
DOI:
10.1021/acsami.7b04478

14. Direct one-pot conversion of monosaccharides into high-yield 2,5-dimethylfuran over a multifunctional Pd/Zr-based metal–organic framework@sulfonated graphene oxide catalyst

Author:
Kim, Seung Min,   et al.   ; Insyani, Rizki; Verma, Deepak; Kim, Jaehoon;     Show all 4 Authors
Source:
Green chemistry 2017 v.19 no.11 pp. 2482-2490
ISSN:
1463-9270
Subject:
acidity; catalysts; coordination polymers; fructose; glucose; graphene oxide; green chemistry; hydrogen; hydrogenation; hydroxymethylfurfural; nanoparticles; palladium; tetrahydrofuran
Abstract:
... A one-pot conversion of monosaccharides (fructose and glucose) into high-yield 2,5-dimethylfuran (2,5-DMF) is demonstrated over a multifunctional catalyst obtained by loading Pd on a Zr-based metal–organic framework (UiO-66) that is deposited on sulfonated graphene oxide (Pd/UiO-66@SGO). The Brønsted acidity associated with UiO-66@SGO activates the fructose dehydration to form 5-hydroxymethylfurfu ...
DOI:
10.1039/c7gc00269f

15. Direct conversion of cellulose to high-yield methyl lactate over Ga-doped Zn/H-nanozeolite Y catalysts in supercritical methanol

Author:
Kim, Seung Min,   et al.   ; Verma, Deepak; Insyani, Rizki; Suh, Young-Woong; Kim, Seok Ki; Kim, Jaehoon;     Show all 6 Authors
Source:
Green chemistry 2017 v.19 no.8 pp. 1969-1982
ISSN:
1463-9270
Subject:
Bronsted acids; Lewis acids; biodegradability; biomass; catalysts; cellulose; gallium; glucose; green chemistry; lactic acid; lignocellulose; methanol; polymers; solvents; surface area; synergism; trioses; value added; zinc; zinc oxide
Abstract:
... For realizing sustainable bio-based refineries, it is crucial to obtain high yields of value-added chemicals via the direct conversion of cellulose and lignocellulosic biomass. Although the conversion of cellulose using homogeneous catalysts has been demonstrated to be quite successful, low cellulose conversion and poor product selectivity have been observed using heterogeneous catalysts. In this ...
DOI:
10.1039/c7gc00432j

16. Development of an HTS system to identify natural chemicals that specifically inhibit Escherichia coli O157:H7 adhesion to host cells

Author:
Kim, Seung Min,   et al.   ; Kim, Hyun Jung;     Show all 2 Author
Source:
Food control 2017 v.73 pp. 185-192
ISSN:
0956-7135
Subject:
Escherichia coli O157; adhesion; bacterial infections; cost effectiveness; cytotoxicity; epithelial cells; genes; intestinal mucosa; loci; microbial growth; pathogenesis; pathogens; screening; virulence
Abstract:
... Adhesion to intestinal epithelium is critical for virulence and infection of Escherichia coli O157:H7, which is a major cause of foodborne illnesses. Targeting adhesion but not growth of the pathogen is an effective approach to control bacterial infections. In this study, a high-throughput screening system was developed to identify anti-adhesive natural chemicals using a reporter strain whose acti ...
DOI:
10.1016/j.foodcont.2016.08.007

17. Accurate measurement of specific tensile strength of carbon nanotube fibers with hierarchical structures by vibroscopic method

Author:
Kim, Seung Min,   et al.   ; Park, Junbeom; Lee, Sung-Hyun; Lee, Jaegeun; Lee, Dong-Myeong; Yu, Hayoung; Jeong, Hyeon Su; Lee, Kun-Hong;     Show all 8 Authors
Source:
RSC advances 2017 v.7 no.14 pp. 8575-8580
ISSN:
2046-2069
Subject:
carbon nanotubes; probability; tensile strength
Abstract:
... The specific strength of a carbon nanotube (CNT) fiber can be estimated to be much higher than its real value when the linear density of the fiber is measured using the vibroscopic method. This is because CNT fibers are not made of a single fiber, as assumed in the standard ASTM procedure, but rather have a hierarchical structure composed of CNTs and CNT bundles. Based on careful investigation, a ...
DOI:
10.1039/c6ra26607j

18. Modelling of tetracycline resistance gene transfer by commensal Escherichia coli food isolates that survived in gastric fluid conditions

Author:
Kim, Seung Min,   et al.   ; Hwang, Daekeun; Kim, Hyun Jung;     Show all 3 Authors
Source:
International journal of antimicrobial agents 2017 v.49 no.1 pp. 81-87
ISSN:
0924-8579
Subject:
Koreans; Weibull statistics; acid tolerance; antibiotic resistance; bacteria; cooking; enterohemorrhagic Escherichia coli; exposure models; gastric juice; gene transfer; genes; horizontal gene transfer; humans; kinetics; pH; risk management; tetracycline; South Korea
Abstract:
... Antimicrobial resistance (AR) is a major public health concern and a food safety issue worldwide. Escherichia coli strains, indicators of antibiotic resistance, are a source of horizontal gene transfer to other bacteria in the human intestinal system. A probabilistic exposure model was used to estimate the transfer of the AR gene tet(A). The acid resistance and kinetic behaviour of E. coli was ana ...
DOI:
10.1016/j.ijantimicag.2016.10.009

19. Cancer-derived exosomes as a delivery platform of CRISPR/Cas9 confer cancer cell tropism-dependent targeting

Author:
Kim, Seung Min,   et al.   ; Yang, Yoosoo; Oh, Seung Ja; Hong, Yeonsun; Jang, Mihue;     Show all 5 Authors
Source:
Journal of Controlled Release 2017
ISSN:
0168-3659
Subject:
apoptosis; cisplatin; cytotoxicity; epithelium; exosomes; gene editing; immune response; mice; ovarian neoplasms; plasmids; therapeutics
Abstract:
... An intracellular delivery system for CRISPR/Cas9 is crucial for its application as a therapeutic genome editing technology in a broad range of diseases. Current vehicles carrying CRISPR/Cas9 limit in vivo delivery because of low tolerance and immunogenicity; thus, the in vivo delivery of genome editing remains challenging. Here, we report that cancer-derived exosomes function as natural carriers t ...
DOI:
10.1016/j.jconrel.2017.09.013

20. Mechanical and electrical properties of thermochemically cross-linked polymer carbon nanotube fibers Part A Applied science and manufacturing

Author:
Kim, Seung Min,   et al.   ; Park, Ok-Kyung; Lee, Wonki; Hwang, Jun Yeon; You, Nam-Ho; Jeong, Youngjin; Ku, Bon-Cheol;     Show all 7 Authors
Source:
Composites 2016 v.91 pp. 222-228
ISSN:
1359-835X
Subject:
Raman spectroscopy; X-ray photoelectron spectroscopy; carbon nanotubes; composite materials; crosslinking; electrical conductivity; modulus of elasticity; polymers; tensile strength; thermogravimetry; transmission electron microscopy
Abstract:
... We report an effective post-treatment method to improve the mechanical and electrical properties of carbon nanotube fibers (CNTF) by using an aryl radical coupling reaction of polymers. The modified CNTF were analyzed using X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, thermogravimetric analysis (TGA) and transmission electron microscopy (TEM). The results demonstrated that chemical ...
DOI:
10.1016/j.compositesa.2016.10.016

21. Contamination patterns and molecular typing of Bacillus cereus in fresh-cut vegetable salad processing

Author:
Kim, Seung Min,   et al.   ; Kim, Hyun Jung; Koo, Minseon; Hwang, Daekeun; Choi, Jeong Hee; Oh, Se-Wook;     Show all 6 Authors
Source:
Han'guk Ŭngyong Saengmyŏng Hwahakhoe chi = 2016 v.59 no.4 pp. 573-577
Subject:
Bacillus cereus; business enterprises; clones; food pathogens; food safety; fresh-cut produce; genetic similarity; manufacturing; raw materials; raw vegetables; salads; washing; Korean Peninsula
Abstract:
... Microbiological contamination of fresh vegetables is a recent food safety concern. Bacillus cereus has been recognized as the most frequently detected foodborne pathogen in fresh-cut salads in Korea. Prevalence and level of contamination of B. cereus was determined in samples from processing lines of packaged fresh-cut vegetable salad manufacturing companies (A, B, C, and D). B. cereus was detecte ...
DOI:
10.1007/s13765-016-0198-z

22. Effects of a SiO₂ sub-supporting layer on the structure of a Al₂O₃ supporting layer, formation of Fe catalyst particles, and growth of carbon nanotube forests

Author:
Kim, Seung Min,   et al.   ; Lee, Jaegeun; Lee, Cheol Hun; Park, Junbeom; Lee, Dong-Myeong; Lee, Kun-Hong; Jo, Sae Byeok; Cho, Kilwon; Maruyama, Benji;     Show all 9 Authors
Source:
RSC advances 2016 v.6 no.72 pp. 68424-68432
ISSN:
2046-2069
Subject:
adhesion; aluminum oxide; atomic force microscopy; carbon nanotubes; catalysts; contact angle; iron; liquids; silica; silicon; transmission electron microscopy
Abstract:
... We investigate the effects of a SiO₂ sub-supporting layer on the growth of carbon nanotube (CNT) forests, especially on the spinnability of the CNT forest into a CNT yarn, which is one of the most promising application areas based on CNTs as a light-weight, strong, and electrically and thermally conductive macro-scale material. So far, most spinnable CNT forest growths have been performed using Fe ...
DOI:
10.1039/c6ra12250g

23. A facile method for transparent carbon nanosheets heater based on polyimide

Author:
Kim, Seung Min,   et al.   ; Souri, Hamid; Yu, Seong Jun; Yeo, Hyeonuk; Goh, Munju; Hwang, Jun-Yeon; Ku, Bon-Cheol; Jeong, Young Gyu; You, Nam-Ho;     Show all 9 Authors
Source:
RSC advances 2016 v.6 no.58 pp. 52509-52517
ISSN:
2046-2069
Subject:
carbonization; electric power; electrical conductivity; graphene; heat treatment; heaters; nanosheets; polymers; quartz; temperature
Abstract:
... In this work, a novel film heater in nanometer-scale thickness based on catalyst-free and transfer-free carbon nanosheets (CNSs) with properties similar to graphene is fabricated. Here, poly(amic acid) (PAA), which is composed of several aromatic hydrocarbon rings, is used as the carbon precursor of CNS films. Altering the polymer concentration easily controls the morphological, optical, and elect ...
DOI:
10.1039/c6ra07457j

24. A prebiotic effect of Ecklonia cava on the growth and mortality of olive flounder infected with pathogenic bacteria

Author:
Kim, Seung Min,   et al.   ; Lee, WonWoo; Ahn, Ginnae; Oh, Jae Young; Kang, Nalae; Kim, Eun A.; Kim, Kil-Nam; Jeong, Joon Bum; Jeon, You-Jin;     Show all 9 Authors
Source:
Fish & shellfish immunology 2016 v.51 pp. 313-320
ISSN:
1050-4648
Subject:
Ecklonia; Edwardsiella tarda; Lactobacillus plantarum; Paralichthys olivaceus; Streptococcus iniae; Vibrio harveyi; bacteria; blood serum; body weight; ethanol; flounder; immune response; innate immunity; lysozyme; marine fish; mortality; myeloperoxidase; prebiotics; probiotics; Japan; Korean Peninsula
Abstract:
... Olive flounder (Paralichthys olivaceus), also known as the Japanese flounder in Japan, is one of the most important commercial marine finfish species cultured in Korea and Japan. The purpose of this study was to evaluate how a species of brown algae (Ecklonia cava, E. cava) affects the growth rate of olive flounder and its immune response to pathogenic bacteria. First, the experimental fish were d ...
DOI:
10.1016/j.fsi.2016.02.030

25. Hydrogen-enriched porous carbon nanosheets with high sodium storage capacity

Author:
Kim, Seung Min,   et al.   ; Yoon, Dohyeon; Kim, Dong Hyun; Chung, Kyung Yoon; Chang, Wonyong; Kim, Jaehoon;     Show all 6 Authors
Source:
Carbon 2016 v.98 pp. 213-220
ISSN:
0008-6223
Subject:
batteries; carbon; electrochemistry; electrodes; hydrogen; ion transport; isopropyl alcohol; nanosheets; porosity; sodium; surface area
Abstract:
... A simple supercritical alcohol route was developed to fabricate hydrogen-enriched porous carbon nanosheets (H-PCNs). The as-prepared H-PCNs were tested as an anode active material for sodium ion batteries. Due to the unique hydrogen donation and alkoxylation ability associated with supercritical isopropanol, the hydrogen-to-carbon ratio of H-PCNs was as high as 2.3. The H-PCNs electrode exhibit an ...
DOI:
10.1016/j.carbon.2015.11.009

26. Antimicrobial potential of Leuconostoc species against E. coli O157:H7 in ground meat

Author:
Kim, Seung Min,   et al.   ; Koo, Ok Kyung; Kang, Sun-Hee;     Show all 3 Authors
Source:
Han'guk Ŭngyong Saengmyŏng Hwahakhoe chi = 2015 v.58 no.6 pp. 831-838
ISSN:
1738-2203
Subject:
Brochothrix thermosphacta; Escherichia coli O157; Leuconostoc; Listeria monocytogenes; Salmonella; Staphylococcus aureus; anti-infective agents; antibacterial properties; bacteria; bacterial contamination; cross contamination; food biopreservatives; food contamination; food pathogens; genes; grinding; ground beef; growth retardation; heat; loci; organic acids and salts; pH; spoilage bacteria; virulence
Abstract:
... Ground beef is risky by foodborne pathogens such as E. coli O157:H7 due to the cross-contamination during grinding. The objective of this study was to evaluate the antagonistic activities of Leuconostoc species isolated from ground beef product in order to limit the growth of E. coli O157:H7. While Leuconostoc has been known as spoilage bacteria, the Leuconostoc isolates showed antimicrobial activ ...
DOI:
10.1007/s13765-015-0112-0

27. Multiplex real-time PCR assay for Legionella species

Author:
Kim, Seung Min,   et al.   ; Jeong, Yoojung; Sohn, Jang Wook; Kim, Min Ja;     Show all 4 Authors
Source:
Molecular and cellular probes 2015 v.29 pp. 414-419
ISSN:
0890-8508
Subject:
DNA primers; Legionella pneumophila; comparative genomic hybridization; diagnostic techniques; epidemiological studies; human diseases; nucleotide sequences; quantitative polymerase chain reaction; rapid methods; serotypes
Abstract:
... Legionella pneumophila serogroup 1 (sg1) accounts for the majority of infections in humans, but other Legionella species are also associated with human disease. In this study, a new SYBR Green I-based multiplex real-time PCR assay in a single reaction was developed to allow the rapid detection and differentiation of Legionella species by targeting specific gene sequences. Candidate target genes we ...
DOI:
10.1016/j.mcp.2015.08.004

28. The influence of boundary layer on the growth kinetics of carbon nanotube forests

Author:
Kim, Seung Min,   et al.   ; Lee, Jaegeun; Oh, Eugene; Kim, Teawon; Sa, Jeong-Hoon; Lee, Sung-Hyun; Park, Junbeom; Moon, Dustin; Kang, In Seok; Kim, Myung Jong; Lee, Kun-Hong;     Show all 11 Authors
Source:
Carbon 2015 v.93 pp. 217-225
ISSN:
0008-6223
Subject:
carbon; carbon nanotubes; mass transfer; prediction
Abstract:
... The growth of carbon nanotube (CNT) forests has been limited to the centimeter scale due to insufficient understanding of their growth kinetics. To investigate the growth kinetics of CNT forests, we characterized the mass transport phenomena arising during CNT forest. We formulated the hypothesis that such growth is mass transport limited and proposed a model describing this mass transport. Accord ...
DOI:
10.1016/j.carbon.2015.05.080

29. Antimicrobial resistance, molecular, and phenotypic diversity of Escherichia coli isolates from fresh vegetable products in Korea

Author:
Kim, Seung Min,   et al.   ; Oh, Taeyoung; Kim, Hyun Jung;     Show all 3 Authors
Source:
Han'guk Ŭngyong Saengmyŏng Hwahakhoe chi = 2015 v.58 no.5 pp. 745-750
ISSN:
1738-2203
Subject:
Escherichia coli; antibiotic resistance; biofilm; food safety; genotype; multiple drug resistance; phenotypic variation; piperacillin; polymerase chain reaction; public health; public safety; vegetable products; virulence; Korean Peninsula
Abstract:
... Escherichia coli is generally considered as an indicator of antimicrobial resistance due to its genetic flexibility and adaptability. In the present study, antimicrobial resistance patterns, biofilm formation ability, and genotypes were assessed in E. coli isolates from fresh vegetable products in Korea. Among 120 isolates, 22 isolates (18.3 %) were resistant to one or more antimicrobials and 11 i ...
DOI:
10.1007/s13765-015-0104-0

30. Investigating Local Degradation and Thermal Stability of Charged Nickel-Based Cathode Materials through Real-Time Electron Microscopy

Author:
Kim, Seung Min,   et al.   ; Hwang, Sooyeon; Bak, Seong-Min; Cho, Byung-Won; Chung, Kyung Yoon; Lee, Jeong Yong; Chang, Wonyoung; Stach, Eric A.;     Show all 8 Authors
Source:
ACS Applied Materials & Interfaces 2014 v.6 no.17 pp. 15140-15147
ISSN:
1944-8252
Subject:
cathodes; energy; lithium batteries; oxygen; porosity; superoxide anion; temperature; thermal stability; transmission electron microscopy
Abstract:
... In this work, we take advantage of in situ transmission electron microscopy (TEM) to investigate thermally induced decomposition of the surface of LiₓNi₀.₈Co₀.₁₅Al₀.₀₅O₂ (NCA) cathode materials that have been subjected to different states of charge (SOC). While uncharged NCA is stable up to 400 °C, significant changes occur in charged NCA with increasing temperature. These include the development ...
DOI:
10.1021/am503278f

31. Regulatory characteristics of the Vibrio vulnificus rtxHCA operon encoding a MARTX toxin

Author:
Kim, Seung Min,   et al.   ; Park, Jinseo; Jeong, Hee Gon; Choi, Sang Ho;     Show all 4 Authors
Source:
The journal of microbiology 2012 v.50 no.5 pp. 878-881
ISSN:
1225-8873
Subject:
Vibrio vulnificus; mice; microbiology; open reading frames; operon; transcription (genetics); virulence
Abstract:
... Vibrio vulnificus MARTX encoded by rtxA, an open reading frame of the rtxHCA operon, is essential for virulence in vitro and in mice. In this study, a primer extension analysis revealed that transcription of the rtxHCA operon begins at a single site, and is under the direction of a single promoter, P rtxHCA . P rtxHCA activity appeared at the beginning of growth and reached a maximum in mid-expone ...
DOI:
10.1007/s12275-012-2479-5

32. Size and Support Effects for the Water–Gas Shift Catalysis over Gold Nanoparticles Supported on Model Al2O3 and TiO2

Author:
Kim, Seung Min,   et al.   ; Shekhar, Mayank; Wang, Jun; Lee, Wen-Sheng; Williams, W. Damion; Stach, Eric A.; Miller, Jeffrey T.; Delgass, W. Nicholas; Ribeiro, Fabio H.;     Show all 9 Authors
Source:
Journal of the American Chemical Society 2012 v.134 no.10 pp. 4700-4708
ISSN:
1520-5126
Subject:
Fourier transform infrared spectroscopy; activation energy; active sites; aluminum oxide; carbon dioxide; catalysts; catalytic activity; gold; hydrogen; image analysis; models; nanogold; particle size; particle size distribution; reflectance; titanium dioxide; transmission electron microscopy
Abstract:
... The water–gas shift (WGS) reaction rate per total mole of Au under 7% CO, 8.5% CO₂, 22% H₂O, and 37% H₂ at 1 atm for Au/Al₂O₃ catalysts at 180 °C and Au/TiO₂ catalysts at 120 °C varies with the number average Au particle size (d) as d–².²±⁰.² and d–².⁷±⁰.¹, respectively. The use of nonporous and crystalline, model Al₂O₃ and TiO₂ supports allowed the imaging of the active catalyst and enabled a pre ...
DOI:
10.1021/ja210083d

33. Compound mutations of PEO1 and TYMP in a progressive external ophthalmoplegia patient with incomplete mitochondrial neurogastrointestinal encephalomyopathy phenotype

Author:
Kim, Seung-Min,   et al.   ; Nakhro, Khriezhanuo; Chung, Ki Wha; Sunwoo, Il-Nam; Cho, Eun Min; Park, Sun Wha; Hwang, Jung Hee; Choi, Byung-Ok;     Show all 8 Authors
Source:
Genes & genomics 2011 v.33 no.4 pp. 431-437
ISSN:
1976-9571
Subject:
magnetic resonance imaging; neurophysiology; image analysis; muscle physiology; phenotype; mitochondrial DNA; patients; clinical examination; eye diseases; exons; point mutation
Abstract:
... The Mendelian inherited progressive external ophthalmoplegia (PEO) and mitochondrial neurogastrointestinal encephalomyopathy (MNGIE) are genetically heterogeneous mitochondrial diseases caused by nuclear-mitochondrial intergenomic defects. The PEO1 and TYMP nuclear genes are closely related in the machinery of the mitochondrial DNA (mtDNA) replication. Mutations in PEO1 and TYMP genes usually caus ...
DOI:
10.1007/s13258-011-0089-y

34. Surface functionalized silica as a toolkit for studying aqueous phase palladium adsorption and mineralization on thiol moiety in the absence of external reducing agents

Author:
Kim, Seung-Min,   et al.   ; Lim, Jung-Sun; Lee, Sang-Yup; Stach, Eric A.; Culver, James N.; Harris, Michael T.;     Show all 6 Authors
Source:
Journal of colloid and interface science 2011 v.356 no.1 pp. 31-36
ISSN:
0021-9797
Subject:
adsorption; amino acids; ion transport; mineralization; nanoparticles; palladium; reducing agents; silica; thiols; virion
Abstract:
... Biological templates such as virions or protein assemblies have several surface functional groups that can complicate the elucidation of the fundamental mechanism(s) governing the sorption and mineralization of metals on the surface of the template. Surface functionalized silica nanoclusters with hydroxyl, amine, or thiol groups serve as surrogates for understanding the interaction between individ ...
DOI:
10.1016/j.jcis.2010.12.064

35. Preferential Growth of Single-Walled Carbon Nanotubes with Metallic Conductivity

Author:
Kim, Seung Min,   et al.   ; Harutyunyan, Avetik R.; Chen, Gugang; Paronyan, Tereza M.; Pigos, Elena M.; Kuznetsov, Oleg A.; Hewaparakrama, Kapila; Zakharov, Dmitri; Stach, Eric A.; Sumanasekera, Gamini U.;     Show all 10 Authors
Source:
Science 2009 v.326 no.5949 pp. 116-120
ISSN:
0036-8075
Subject:
annealing; carbon nanotubes; catalysts; nanoparticles; stereoisomerism; transmission electron microscopy
Abstract:
... Single-walled carbon nanotubes can be classified as either metallic or semiconducting, depending on their conductivity, which is determined by their chirality. Existing synthesis methods cannot controllably grow nanotubes with a specific type of conductivity. By varying the noble gas ambient during thermal annealing of the catalyst, and in combination with oxidative and reductive species, we alter ...
DOI:
10.1126/science.1177599