• 한국초전도학회:학술대회논문집
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• 2008.08a
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• pp.76-76
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• 2008

• 한국초전도학회:학술대회논문집
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• 2008.08a
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• pp.80-80
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• 2008

• Proceedings of the Korean Ceranic Society Conference
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• 2002.10a
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• pp.171.1-171
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• 2002

• Proceedings of the Korean Magnestics Society Conference
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• 2005.06a
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• pp.34-35
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• 2005

• Culinary science and hospitality research
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• v.22 no.8
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• pp.219-225
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• 2016

This study was conducted to investigate the amount of fat, vitamins and minerals in milk can be affected by hydrodynamic cavitation since cavitation is recently focused on as one of the sterilization methods. Vitamins (vitamin A, $B_2$), minerals (Ca, P, Mg, Zn) and fat contents were measured according to Ministry of Food and Drug Safety's Processing Standards and Component Specifications of Animal Product. Vitamin A & $B_2$ contents decreased approximately 23% & 19%, respectively after cavitation. Minerals content showed no change after cavitation. Also, P and Mg contents were reduced after cavitation to 2 mg/100g and 0.1 mg/100g, showing no change. Milk fat content was 3.46% before cavitation and 3.41% after cavitation, displaying no difference. Hydrodynamic cavitation process displays a possibility to replace existing pasteurizing method, as it does not change vitamin or mineral contents in milk. Therefore, a more clear and systematic research on hydrodynamic cavitation pasteurization is needed to distribute excellent quality milk and to emphasize physiochemical properties and quality change of existing heat pasteurization process.

• Progress in Superconductivity and Cryogenics
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• v.21 no.3
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• pp.18-21
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• 2019

We studied the effect of Fe ion irradiation on the upper critical field ($H_{c2}$) of 410 nm single-crystalline $MgB_2$ thin films. The irradiation energy was fixed at 140 keV when we increased the irradiation doses from $1{\times}10^{14}ion/cm^2$ to $4{\times}10^{14}ion/cm^2$. We found that $H_{c2}$ significantly increase with increasing irradiation dose, despite the low irradiation energy. The enhancement of $H_{c2}$ could be explained by the reduction of electron mean free path caused by defects induced from irradiation, leading to a decrease of coherence length (${\xi}$). We also discussed the effect of irradiation on temperature-dependent resistivity in details.

• Progress in Superconductivity
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• v.7 no.2
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• pp.103-108
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• 2006

We have measured the Hall resistivity (${\rho}_{xy}$) and the longitudinal resistivity (${\rho}_{xy}$) on superconducting $MgB_2$ thin films in extended fields up to 18 T. We found a universal scaling behavior between the Hall resistivity and the longitudinal resistivity, which is independent of the temperature and the magnetic field. At a wide magnetic field region from 1 to 18T, a universal power law of ${\beta}=2.0{\pm}0.1$ in a scaling relation, ${\rho}_{xy}={A{\rho}_{xx}}^{\beta}$, was observed in c-axis-oriented $MgB_2$ thin films. These results can be well interpreted by using recent models.

• The Korean Journal of Physiology and Pharmacology
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• v.25 no.4
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• pp.321-331
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• 2021

Vancomycin, an antibiotic used occasionally as a last line of treatment for methicillin-resistant Staphylococcus aureus, is reportedly associated with nephrotoxicity. This study aimed at evaluating the protective effects of lutein against vancomycin-induced acute renal injury. Peroxisome proliferator-activated receptor gamma (PPARγ) and its associated role in renoprotection by lutein was also examined. Male BALB/c mice were divided into six treatment groups: control with normal saline, lutein (200 mg/kg), vancomycin (250 mg/kg), vancomycin (500 mg/kg), vancomycin (250 mg/kg) with lutein, and vancomycin (500 mg/kg) with lutein groups; they were euthanized after 7 days of treatment. Thereafter, samples of blood, urine, and kidney tissue of the mice were analyzed, followed by the determination of levels of N-acetyl-β-D-glucosaminidase (NAG) in the urine, renal creatine kinase; protein carbonyl, malondialdehyde, and caspase-3 in the kidney; and the expression of PPARγ, nuclear factor erythroid 2-related factor 2 (Nrf2), and nuclear factor-kappaB (NF-κB) in renal tissue. Results showed that the levels of protein carbonyl and malondialdehyde, and the activity of NAG, creatine kinase and caspase-3, were significantly increased in the vancomycin-treatment groups. Moreover, the levels of Nrf2 significantly decreased, while NF-κB expression increased. Lutein ameliorated these effects, and significantly increased PPARγ expression. Furthermore, it attenuated vancomycin-induced histological alterations such as, tissue necrosis and hypertrophy. Therefore, we conclude that lutein protects against vancomycin-induced renal injury by potentially upregulating PPARγ/Nrf2 expression in the renal tissues, and consequently downregulating the pathways: inflammation by NF-κB and apoptosis by caspase-3.

• Proceedings of the Korean Society for Technology of Plasticity Conference
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• 2003.10a
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• pp.281-284
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• 2003

The microstructural changes of Al-Zn-Mg-Cu alloy containing Sc during hot extrusion and post heat treatment is investigated. Two kinds of Al-Sc alloys with different alloying elements (B1, B2) are hot extruded to make I-shape bars at 380$^{\circ}C$, then the bars are solution treated at 480$^{\circ}C$ for 2hrs followed by artificial aging at 120$^{\circ}C$ for 24hrs. The interior microstructure of as extruded bar consists of elongated grains, however, fine equiaxed grains are mainly observed around surface. The microstructural gradient suggests that different restoration process can proceed during the hot extrusion. For B1 and B2, different grain growth behaviors are found around the surface during the post heat treatment. Rapid grain growth behavior around the surface is discussed related with the crystallographic orientation of the grain.

• 한국초전도학회:학술대회논문집
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• 2009.07a
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• pp.39-39
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• 2009