• Journal of the Korean Society of Food Science and Nutrition
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• v.33 no.7
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• pp.1126-1132
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• 2004

The present study was undertaken to evaluate the effect of functional food, which was processed with fermented soybean as main ingredient (FS), on the body weight, organ weight, plasma glucose, and plasma lipid in diabetic rats caused by streptozotocin (STZ). The body weight was decreased more slowly in the FS group than in the diabetic, and the food intake increased significantly in all diabetic groups. The food efficiency was very low in all diabetic groups, but increased significantly in the FS groups than diabetic control (p＜0.05). In comparing the weight of organ, the weight of liver and kidney were increased in all diabetic groups than in the control, and decreased slightly in FS groups. The weight of heart and spleen were not different among all test groups. In the oral glucose tolerance test, the blood glucose in the diabetic group was the highest in 60 minutes. And the blood glucose in the FS group was the highest in 30 minutes, and decreased significantly after 120 minutes to the level of fasting glucose. The glucose in serum was decreased significantly in the FS groups fed the functional food for 4 weeks, compared to the diabetic control (p＜0.05). Total cholesterol, triglyceride and atherogenic index (AI) in serum were significantly higher in diabetic control, compared to the normal (p＜0.05), and decreased by 16.4％, 15.4％ and 48.3％, respectively, in the FS fed 400 mg/kg of functional food. HDL-cholesterol was increased significantly in the FS-400, compared to the diabetic control. These results support that functional food using fermented soybean improve glucose and lipid metabolism in diabetic rats.

• 한국신재생에너지학회:학술대회논문집
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• 2010.06a
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• pp.229.1-229.1
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• 2010

We investigated the effect of chemical acid treatments on hydrogen storage behaviors of the ordered mesoporous carbons (MCs). The surface functional groups and specific elements of the MCs were characterized with Fourier Transform Infrared (FT-IR) spectrometry and X-ray photoelectron spectroscopy (XPS). Also, the changes in the surface functional groups of the MCs were quantitatively detected by Boehm's titration method. The structural properties of the MCs were investigated using X-ray diffraction (XRD). The hydrogen adsorption capacity of the MCs was evaluated by means of adsorption isotherms at 77 K/1 bar. The formation of surface functional groups by the acidic treatments could influence on the hydrogen storage capacity of the MCs.

• Advances in materials Research
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• v.3 no.2
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• pp.117-128
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• 2014

Processable conducting polyaniline derivative with free amine functional groups was successfully synthesized from the monomer o-phenylenediamine in aqueous hydrochloric acid medium using ammonium persulfate as an oxidative initiator. The synthesized poly(o-phenylenediamine) (PoPD) in critical condition was found to be completely soluble in common organic solvents like dimethyl sulfoxide, N,N-dimethyl formamide etc. From the intrinsic viscosity measurement, the optimum condition for the polymerization was established. The polymer was characterized by ultraviolet visible spectroscopy, Fourier transform infrared spectroscopy, proton magnetic resonance spectroscopy ($^1HNMR$) and thermogravimetric (TGA) analyses. The weight average molecular weights of the synthesized polymers were determined by the dynamic light scattering (DLS) method. From the spectroscopic analysis the structure was found to resemble that of polyaniline derivative with free amine functional groups attached to ortho/meta position in the phenyl ring. However, very little ladder unit was also present with in the polymer chain. The moderate thermal stability of the synthesized polymer could be found from the TGA analysis. The average DC conductivity of $2.8{\times}10^{-4}S/cm$ was observed for the synthesized polymer pellet after doping with hydrochloric acid.

• Proceedings of the Membrane Society of Korea Conference
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• 1995.09a
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• pp.39-55
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• 1995

Modified polycrylonitrile(PAN) membranes were prepared by emulsion or emulsifier-free emulsion polymerization technique. Separation capacity was determined at several operating temperatures(25, 40, 55 and 70 $^{\circ}$C) to dehydrate 56wt% pyridine aqueous solution through modified PAN membranes having different functional groups. All these PAN-based membranes were selective toward water to different degrees depending on the nature of functional groups present in the membranes. Pervaporation characteristics of PAN-based membranes are so different and classified into three categories depending on the type of the functional groups in PAN copolymers. Among PAN-based membranes, the in-situ complex membranes show the best separation capacity over the operating temperatures.

• BMB Reports
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• v.33 no.1
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• pp.43-48
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• 2000

4-Aminobutyrate aminotransferase is a key enzyme of the 4-aminobutyric acid shunt. It converts the neurotransmitter 4-aminobutyric acid to succinic semialdehyde. In order to study the structural and functional aspects of catalytically active Cys residues of pig brain 4-aminobutyrate aminotransferase, we purified the active form in E. coli by coproduction of thioredoxin. The structural arrangement for functional requirements of a dimeric protein using a bifunctional sultbydryl reagent was then characterized, and the spatial proximity between the essential SH groups and a cofactor (pyridoxal-5'-phosphate) binding site was determined. The bifunctional sultbydryl reagent DMDS reacted with the enzyme at the ratio of one molecule per enzyme dimer. This resulted in an approximately 50% loss of enzymatic activity. The spatial proximity of the distance between the essential SH groups and the cofactor-binding site was determined by the energy transfer measurement technique. The result (approximate 20 ${\AA}$) suggested that cross-linking of two sulfhydryl groups with DMDS is not near a PLP binding site.

• Journal of Information Display
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• v.11 no.3
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• pp.95-99
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• 2010

A series of new dielectric polymers with phenyl, epoxy, and carboxylicacid functional groups was prepared via free-radical polymerization. The effect of such dielectric polymers with various functional groups on the performance of OTFT was investigated. The nonpolar groups of terpolymer made the surface of the dielectric layer more hydrophobic and improved the crystal growth of pentacene on the gate insulator, resulting in higher mobility. By controlling the functional group, the electric characteristics of OTFT performance was varied, with $0.00017-0.15\;cm^2/V{\cdot}s$ mobility.

• Carbon letters
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• v.5 no.3
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• pp.103-107
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• 2004

The atmospheric pressure plasma treatments ($Ar/O_2$ and $Ar/N_2$) of activated carbon fibers (ACFs) were carried out to introduce hydrophilic functional groups on carbon surfaces in order to enhance the hydrogen chloride gas (HCl) adsorption. Surface properties of the ACFs were determined by XPS and SEM. $N_2$/77 K adsorption isotherms were investigated by BET and D-R (Dubinin-Radushkevich) plot methods. The HCl removal efficiency was confirmed by HCl detecting tubes (range:1~40 or 40~1000 ppm). As experimental results, it was found that all plasma-treated ACFs showed the decrease in the pore volume, but the HCl removal efficiency showed higher level than that of the untreated ACFs. This result indicated that the plasma treatments led to the conformation of hydrophilic functional groups on the carbon surfaces, resulting in the increase of the interaction between the ACFs and HCl gas.

• Journal of the Korean Ceramic Society
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• v.40 no.9
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• pp.819-826
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• 2003

This article is concerned with the overview of activated carbons as electrode materials in electric double-layer capacitors. Firstly, this article introduced various types of activated carbons with their precursors and manufacturing conditions which can be divided into two main steps of the carbonization and activation processes. Secondly, the present article gave the detailed discussion about the porous structures and examined previous works on the electrochemical behaviors of activated carbons in relation to their porous structures, along with our recent works. Finally, this article characterized the surface oxygen functional groups and presented their influence on the electrochemical properties of activated carbons by reviewing our recent results.

• The Journal of Internal Korean Medicine
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• v.29 no.3
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• pp.574-581
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• 2008

Objective : Functional dyspepsia is a common disease impeding subjective quality of life. The present study aimed to analyze syndrome differentiation of functional dyspepsia to help with development of oriental therapeutics. Methods : Sixty-eight subjects diagnosed with functional dyspepsia were analyzed and classified into one of five syndrome differentiations. We compared symptomatic characteristics according to the Nepean Dyspepsia Index (NDI), such as severity, kinds of dyspepsia-related complaints and functional dyspepsia quality of life (QOL) among groups. Results : Patients with disharmony between liver and stomach were most prevalent (52.9%), but no patients with complex of fever and cold. The scores of symptom severity and QOL were not significantly different between groups. Each group had a specified pattern of complaints. Conclusions : Clinical-study based analysis of functional dyspepsia constructed by this study, could be useful in objectively developing Oriental medicines for this disease.

• Journal of Acupuncture Research
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• v.31 no.3
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• pp.19-24
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• 2014

Objectives : The purpose of this study is to investigate the efficacy of the electroacupuncture with different frequency on functional dyspepsia. Methods : We observed 30 functional dyspepsia patients from May, 2013 to June, 2014. This study was randomized and double blinded. The patients were divided into two groups. One group(group A) was treated with 3 Hz electroacupuncture and the other group(group B) was treated with 300 Hz electroacupuncture. We evaluated the treatment effect of each group by using visual analogue scale(VAS) and pressure algometer. Results : 1. Functional dyspepsia was significantly improved in group treated with 3 Hz electroacupuncture. 2. Functional dyspepsia was significantly improved in group treated with 300 Hz electroacupuncture. 3. As a result of evaluation there were no statistical significance between two groups. Conclusion : Both 3 Hz and 300 Hz electroacupuncture has significant effect on functional dyspepsia. But there is no significant difference between 3 Hz and 300 Hz electroacupuncture.