• Macromolecular Research
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• v.17 no.10
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• pp.770-775
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• 2009

$\omega$-Anhydride-functionalized poly(ethylene oxide) (PEO) obtained from chain-end functionalization and anionic ring-opening polymerization of ethylene oxide using n-butyllithium with potassium t-butoxide in the presence of dimethylsulfoxide (DMSO) was found to be an efficient material for the preparation of water-soluble, polymeric pro-drugs. The reaction of $\omega$-anhydride-functionalized PEO with sulfonamide or with vancomycin provided an efficient method to produce corresponding, water-soluble, PEO-conjugated sulfonamide or PEO-conjugated, vancomycin pro-drugs. These were used successfully to prepare water-dispersible, silver nanoparticles. In this study, the particle sizes were in the range of $5{\sim}40$ nm. The resulting products were characterized by $^1H$ NMR spectroscopy, transmission electron microscopy, electron and X-ray diffraction, size exclusion chromatography, and UV/Visible spectroscopy.

• Journal of the Korean Society of Tobacco Science
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• v.3 no.1
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• pp.20-24
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• 1981

This experiment was carried out to determine the relationships between maturity and content of the chemical components in flue-cured tobacco. The results were as follows : 1) Among the chemical components, the contents of total nitrogen, ammonia nitrogen, total alkaloids, nicotine, total volatile base, petroleum-ether extract, crude fiber, crude ash, water soluble ash, and chlorine decreased significantly, and those of total sugar, reducing sugar, and starch increased as leaf maturity progressed until the stage of ripeness, but, afterwards, a reverse tendency appeared. 2) There was a significant relationship between maturity and the contents of chemical components, such as total nitrogen, protein nitrogen, ammonia nitrogen, total volatile base, and the correlation coefficients of them were -0.743, -0.789, -0.797, and -0.642, respectively.

• The Journal of Korea Robotics Society
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• v.13 no.3
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• pp.157-163
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• 2018

This paper deals with the development and application of control algorithms for series elastic relief robots for rescue operations in harsh environment like disasters or battlefield. The joint controller applied in this paper has a cascade structure combining inner loop for torque control and outer loop for position control. The torque loop contains feedforward and feedback controller and disturbance observer for independent, decentralized joint control. The effect of the elastic component and motor dynamics are treated as the nonlinear disturbance and compensated with the disturbance observer of torque controller. For the collision detection, Band Designed Disturbance Observer is configured to recognize/respond to external disturbance robustly in the continuously changing environment. The controller is applied to a 7-dof series elastic manipulator to evaluate the torque tracking and collision detection/response performance.

• 한국신재생에너지학회:학술대회논문집
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• 2008.05a
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• pp.471-474
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• 2008

The pyrolytic behavior of waste tire under microwave heating was investigated. Experiments were conducted using a lab- and bench-scale system to delineate the effects of microwave output power on the response. As the results of experiments, it was found that as the microwave output power was increased between 0.84 and 3.04 kW/kg, the oil yield and required time rapidly increased and decreased, respectively. With further increase of the microwave output power, the oil yield and required time did not change significantly.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2007.11a
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• pp.1490-1493
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• 2007

Aerodynamic noise generated from wind turbines is predicted by it's classified source mechanisms using computational method. BPF noise according to the blade passing motion, is modelled on monopole and dipole sources. They are predicted by Farassat 1A equation. Airfoil self noise and turbulence ingestion noise are modelled upon quadrupole sources and are predicted by semi-empirical formulas composed on the groundwork of Brooks et al. and Lowson. Retarded time is considered, not only in low frequency noise prediction but also in turbulence ingestion noise and airfoil self noise prediction. Wind turbine noise emission of a 3MW wind turbine and a 600 kW wind turbine, standing for large and middle sized wind turbines, is analyzed.

• 한국약용작물학회:학술대회논문집
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• 2008.11a
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• pp.177-178
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• 2008

• 한국약용작물학회:학술대회논문집
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• 2008.11a
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• pp.205-206
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• 2008

• 한국약용작물학회:학술대회논문집
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• 2011.09a
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• pp.286-287
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• 2011

• Proceedings of the Korean Society of Toxicology Conference
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• 2001.05a
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• pp.139-139
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• 2001

Arctigenin and demethyltraxillagenin, dibenzylbutyrolactone lignans, are phenylpropanoid plant metabolites with antioxidative and anti-inflammatory activities. The effects of arctigenin and demethyltraxillagenin on the nuclear factor-kB (NF-kB)-mediated inducible nitric oxide synthase (iNOS) gene expression were studied in Raw264.7 cells.(omitted)

• Journal of Veterinary Clinics
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• v.35 no.5
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• pp.226-228
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• 2018

We generated a transgenic male cloned pig which was derived from fibroblast of white Yucatan miniature pig. After 2 weeks of birth, umbilical hernia which was not easily reduced was identified. Considering the usefulness of cloned pig, surgical treatment for umbilical hernia correction was performed and a cloned pig has been maintained healthy. This is the first report and can be useful for the treatments of umbilical hernia of cloned piglets.