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Mokpo National University is a national university located in Muan and Mokpo, South Korea. Wikipedia.

Rhim J.-W.,Mokpo National University
Carbohydrate Polymers | Year: 2011

Agar/clay (Cloisite Na +) nanocomposite films with different amount of the nanoclay (0, 2.5, 5, 10, 15, and 20 g clay/100 g agar) were prepared using a solution intercalation method. Results on X-ray diffraction (XRD) and scanning electron microscopy (SEM) revealed well developed intercalated nanocomposite films especially at low level of nanoclay addition, and their properties were greatly influenced with the clay content. Tensile strength (TS) increased with increase in the clay content up to 10%, and decreased with more than 10% of clay incorporation. Water vapor permeability (WVP), water vapor uptake ratio (WVUR 5), and water solubility (WS) decreased with increase in the nanoclay content due to the tortuous path for water vapor diffusion and strong structure formed between the intercalated silicate layers and the polymer matrix. Hydrophilicity of the nanocomposite films increased with increase in the hydrophilic nanoclay, resulted in decreased water contact angle (CA) and increased swelling ratio (SR). © 2011 Elsevier Ltd All rights reserved. Source

Kim S.C.,Mokpo National University | Shim W.G.,Chonnam National University
Applied Catalysis B: Environmental | Year: 2010

Catalytic combustion of volatile organic compounds (VOCs: benzene and toluene) was studied over manganese oxide catalysts (Mn3O4, Mn2O3 and MnO2) and over the promoted manganese oxide catalysts with alkaline metal and alkaline earth metal. Their properties and performance were characterized by using the Brunauer Emmett Teller (BET), temperature programmed reduction (TPR), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The sequence of catalytic activity was as follows: Mn3O4>Mn2O3>MnO2, which was correlated with the oxygen mobility on the catalyst. Each addition of potassium (K), calcium (Ca) and magnesium (Mg) to Mn3O4 catalyst enhanced the catalytic activity of Mn3O4 catalyst. Accordingly, K, Ca and Mg seemed to act as promoters, and the promoting effect might be ascribed to the defect-oxide or a hydroxyl-like group. A mutual inhibitory effect was observed between benzene and toluene in the binary mixture. In addition, the order of catalytic activity with respect to VOC molecules for single compound is benzene>toluene, and the binary mixture showed the opposite order of toluene>benzene. © 2010. Source

Mokpo National University | Date: 2013-07-23

The present invention relates to a food composition comprising

Mokpo National University | Date: 2011-12-14

Provided is a gastritis and gastric ulcer-treating agent, which is prepared and developed by processing solar salt and bamboo tree into heat-treated purple salt, in which the heat-treated salt, which is prepared by firstly heat-treating mineral rich solar salt and bamboo tree at a high temperature, that is, 1,100 C. or more; and two or more time repeating the heat-treating of the first heat-treated salt and bamboo tree under the above-described conditions, includes a large amount of hydrogen sulfide-producing material and has a purple color, and when the heat-treated salt is used along with aspirin, the heat-treated salt has an excellent effect on preventing stomach damage, thereby significantly reducing bleeding, ulcer, and the damage of mucous membrane, induced by aspirin.

Rhim J.-W.,Mokpo National University
Food Research International | Year: 2013

Multilayer films composed of PLA and agar/κ-carrageenan/clay (Cloisite® Na+) nanocomposite films were prepared, and the effect of lamination of PLA layers on the performance properties such as optical, mechanical, gas barrier, water resistance, and thermal stability properties was determined. The tensile strength (TS) of the agar/κ-carrageenan/clay nanocomposite films (67.8±2.1MPa) was greater than that of PLA films (43.3±3.6MPa), and the water vapor permeability (WVP), water uptake ratio (WUR), and water solubility (WS) of the nanocomposite films were higher than those of PLA films. The film properties of the multilayer films exhibited better properties of the component film layers. Especially, the WVP and water resistance of the bionanocomposite film were improved significantly, while the OTR of the PLA film decreased profoundly after lamination with PLA layers. Thermal stability of the bionanocomposite also increased after lamination with PLA layers. © 2013 Elsevier Ltd. Source

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