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Study of complex electrodeposited thin film with multi-layer graphene-coated metal nanoparticles
Young-Lae Cho, Jung-woo Lee, Chan Park, Young-il Song, Su-Jeong Suh 한국탄소학회 Carbon Letters 6 Pages
한국탄소학회 Carbon Letters 2017, Vol.21 8 68-73 (6 pages)
have a core-shell structure with multi-layer graphene films. It was confirmed that there were 35 layers of graphene and the thickness of one layer was 0.34 nm. (d) Raman spectrum of the MGCNs. Raman shifts at 1348 cm 1, 1586 cm 1, and 2440 cm 1 are the D, G, and 2D peaks, respectively. Fig. 3. Particle size distribution for multilayer graphene-coated copper nanoparticles (MGCNs) by DLS. IPA,... We have demonstrated the production of thin films containing multilayer graphene-coated copper nanoparticles (MGCNs) by a commercial electrodeposition method. The MGCNs were produced by electrical wire explosion, an easily applied technique for creating hybrid metal nanoparticles. The nanoparticles had average diameters of 10?120 nm and quasispherical morphologies. We made a complex-electrodeposited copper thin film (CETF) with a thickness of 4.8 μm by adding 300 ppm MGCNs to the electrolyte... -
Activated carbons prepared from mixtures of coal tar pitch and petroleum pitch and their electrochemical performance as electrode materials for electric double-layer capacitor
Eunji Lee, Soon Hyung Kwon, Poo Reum Choi, Ji Chul Jung, Myung-Soo Kim 한국탄소학회 Carbon Letters 8 Pages
한국탄소학회 Carbon Letters 2015, Vol.16 No.2 2 78-85 (8 pages)
Introduction The electric double-layer capacitor (EDLC) is an energy storage device that is supe- rior to batteries in power density and life cycle. An EDLC stores electric energy by the adsorption-desorption of ions formed at an electric double layer between an electrode and electrolyte. Since the electrochemical performance of the EDLC changes dramati- cally depending on the electrode material... by a charge-discharge method in the voltage range of 0-2.7 V. In order to improve the performance of the electric double-layer capacitor electrode, various mixtures of CTP and petroleum pitch (PP) were activated at the optimal activation conditions previously determined for CTP. Although the specific capacitance of AC electrodes prepared from CTP only and the mixtures of CTP and PP was not significantly different at a current density of 1 A/g, the AC electrodes from CTP and PP mixtures showed... -
Multi-Homologous Recombination-Based Gene Manipulation in the Rice Pathogen Fusarium fujikuroi
한국식물병리학회 The Plant Pathology Journal 9 Pages
한국식물병리학회 The Plant Pathology Journal 2016, 32권 3호 1 173-181 (9 pages)
2 cm layer of vermiculite soil. Then, 5-day- old rice seedlings were placed on the upper layer of the soil to prevent direct contact between the inocula and plants. The test tubes were covered with a cap to main- tain the humidity for 7 days. Growing roots contacted the inocula within 2436 hours after inoculation. Five days after inoculation (dai), the seedling height was measured. Seedlings... Gene disruption by homologous recombination is widely used to investigate and analyze the function of genes in Fusarium fujikuroi, a fungus that causes bakanae disease and root rot symptoms in rice. To generate gene deletion constructs, the use of conventional cloning methods, which rely on restriction enzymes and ligases, has had limited success due to a lack of unique restriction enzyme sites. Although strategies that avoid the use of restriction enzymes have been employed to overcome this... -
High-energy-density activated carbon electrode for organic electric-double-layer-capacitor using carbonized petroleum pitch
Poo Reum Choi, Sang-Gil Kim, Ji Chul Jung, Myung-Soo Kim 한국탄소학회 Carbon Letters 11 Pages
한국탄소학회 Carbon Letters 2017, Vol.22 8 70-80 (11 pages)
..PAGE:1 70 High-energy-density activated carbon electrode for organic electric-double-layer-capacitor using carbonized petroleum pitch Poo Reum Choi 1, Sang-Gil Kim 2, Ji Chul Jung 1,♠ and Myung-Soo Kim 1,♠ 1Department of Chemical Engineering, Myongji University, Yongin 17058, Korea 2R&D Center, Vitzrocell Co. Ltd., Yesan 32417, Korea Received 1 February 2017 Accepted 8 March 2017... of electric double-layer capacitors (EDLC) due to their high specific surface areas (SSA), stability, and ecological advantages. In order to make high-energy-density ACs for EDLC, petroleum pitch (PP) precarbonized at 500?1000°C in N2 gas for 1 h was used as the electrode material of the EDLC after KOH activation. As the pre-carbonization temperature increased, the SSA, pore volume and gravimetric capacitance tended to decrease, but the crystallinity and electrode density tended to increase,... -
Kinetic and multi-parameter isotherm studies of picric acid removal from aqueous solutions by carboxylated multi-walled carbon nanotubes in the presence and absence of ultrasound
Soheila Gholitabar, Hasan Tahermansouri 한국탄소학회 Carbon Letters 11 Pages
한국탄소학회 Carbon Letters 2017, Vol.22 2 14-24 (11 pages)
mono- layer distribution. The Khan model presents a better adjustment for the in- terpretation of the obtained data from the stirring method. The maximum uptake values (q s) were well predicted by the model with high correlation coeffcients and minimum ARE and chi-square values. Of course, this model shows that the maximum adsorption capacities are lower than those of the Langmuir model for... Carboxylated multi-wall carbon nanotubes (MWCNTs-COOH) have been used as efficient adsorbents for the removal of picric acid from aqueous solutions under stirring and ultrasound conditions. Batch experiments were conducted to study the influence of the different parameters such as pH, amount of adsorbents, contact time and concentration of picric acid on the adsorption process. The kinetic data were fitted with pseudo-first order, pseudo-secondorder, Elovich and intra-particle diffusion models.... -
Improving dispersion of multi-walled carbon nanotubes and graphene using a common non-covalent modifier
Youbin Kwon, Wonbo Shim, Seung-Yeol Jeon, Ji-Ho Youk, Woong-Ryeol Yu 한국탄소학회 Carbon Letters 9 Pages
한국탄소학회 Carbon Letters 2016, Vol.20 8 53-61 (9 pages)
on its ability to interact with the graphene layer of the MW- CNTs and graphene via the cyano groups in its side branch. The physical wrapping of CNTs and graphene with PAN was investigated for various PAN concentrations, in an at- tempt to simplify and improve the polymer-wrapping pro- cess. Transmission electron microscopy (TEM) analysis confrmed wrapping of the MWCNTs and graphene with a... The reportedly synergistic effects of carbon nanotubes (CNTs) and graphene hybrids have prompted strong demand for an efficient modifier to enhance their dispersion. Here, we investigated the ability of poly(acrylonitrile) (PAN) to overcome the van der Waals interaction of multi-walled CNTs (MWCNTs) and graphene by employing a simple wrapping process involving ultrasonication and subsequent centrifugation of PAN/MWCNT/graphene solutions. The physical wrapping of MWCNTs and graphene with PAN was... -
Molecular Dynamics Simulations of Graphite-Vinylester Nanocomposites and Their Constituents
H. Alkhateb, A. Al-Ostaz, A. H.-D. Cheng 한국탄소학회 Carbon Letters 9 Pages
한국탄소학회 Carbon Letters 2010, Vol.11 No.4 7 316-324 (9 pages)
will not induce any mechanical property variation or improvement beyond the 2300 atom periodic cell. Fig. 15.Double layered graphite super cell (a) side view and (b) top view. Table 2.Double layer graphite engineering constants versus number of supercells Double Layer Graphite (NVT) Number of Supercells Eng. Constant 4×4 (64 atoms) 6×6 (144atoms) 8×8 (256atoms) 10×10 (400 atoms) 12×12 (576... -
Therapeutic effect of topical application of curcumin during treatment of radiation burns in a mini-pig model
Joongsun Kim, Sunhoo Park, Byung-Suk Jeon, Won-Seok Jang, Sun-Joo Lee, Yeonghoon Son, Kyung-Jin Rhim, Soong In Lee, Seung-Sook L 대한수의학회 Journal of Veterinary Science 10 Pages
대한수의학회 Journal of Veterinary Science 2016, 제 17권 제 4호 1 435-444 (10 pages)
longest rete ridge on each slide was selected and measured from the bottom of the basal layer to the bottom of the stratum corneum, avoiding the areas in which the inclusion appeared to be oblique. The mean values were then calculated based on the measurements of each section on each slide. The cell density of the basal layers was determined by counting the cells in the basement membrane at... Curcumin protects the skin against radiation-induced epidermal damage and prevents morphological changes induced by irradiation skin, thereby maintaining the epidermal thickness and cell density of basal layers. In this study, the effects of topical curcumin treatment on radiation burns were evaluated in a mini-pig model. Histological and clinical changes were observed five weeks after radiation exposure to the back (Co gamma-radiation, 50 Gy). Curcumin was applied topically to irradiated skin... -
Immunomodulatory effects of human amniotic membrane-derived mesenchymal stem cells
Jung Won Kang, Hye Cheong Koo*, Sun Young Hwang, Sung Keun Kang, Jeong Chan Ra, Moon Han Lee, Yong Ho Park* 대한수의학회 Journal of Veterinary Science 9 Pages
대한수의학회 Journal of Veterinary Science 2012, 제 13권 제 1호 4 23-31 (9 pages)
10 5 /100 μL) were added to the layer of hAM-MSCs and then cultured with concanavalin A (ConA, 5 μg/mL; Sigma-Aldrich, USA) for 72 h. For some experiments, PBMCs (1 × 10 5 cells/100 μL) were seeded in triplicate in 96-well round-bottom plates (Costar, USA) in the presence of supernatant obtained from hAM-MSCs (1 × 10 5 cells) cultured in 6-well plates (Costar, USA) for 72 h. Leukocyte... Human amniotic membrane-derived mesenchymal stem cells (hAM-MSCs) are capable of differentiating into several lineages and possess immunomodulatory properties. In this study, we investigated the soluble factor-mediated immunomodulatory effects of hAM-MSCs. Mitogen-induced peripheral blood mononuclear cell (PBMC) proliferation was suppressed by hAM-MSCs in a dose-dependent manner as well as hAM-MSC culture supernatant. Moreover, interferon-gamma and interleukin (IL)-17 production significantly... -
Effect of dihydrotestosterone on mouse embryonic stem cells exposed to H2O2-induced oxidative stress
Mi Na Lee, Sang Hun Lee, Min Young Lee, Yun Hee Kim, Jae Hong Park, Jung Min Ryu, Seung Pil Yun, Yu Jin Lee, Mi Ok Kim, Kwangsun 대한수의학회 Journal of Veterinary Science 10 Pages
대한수의학회 Journal of Veterinary Science 2008, 제 9권 제 3호 4 247-256 (10 pages)
min. The upper organic layer was measured using spectrofluorometry at an emission wavelength of 553 nm with an excitation wavelength of 515 nm. The 1,1,3,3-tetraethoxypropane was used as a standard, and the values of LPO for the samples were expressed as nmol/mg protein. Taurine was added to cell mixtures to prevent any initiation of membrane lipid peroxidation during the assay. An addition... Oxidative stresses induced by reactive oxygen species (ROS) have been shown to be involved in several physiological and pathophysiological processes, such as cell proliferation and differentiation. Steroid hormones can protect cells against apoptosis or induce cell proliferation by several mechanisms. Among androgenic hormones, dihydrotestosterone (DHT) is generated by a 5a- reduction of testosterone. Unlike testosterone, DHT cannot be aromatized to estradiol, therefore DHT is considered a pure...