• Journal of the Korean association of regional geographers
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• v.19 no.4
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• pp.627-640
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• 2013

Cette $\acute{e}$tude a pour objet d'analyser le processus de morphogen$\grave{e}$se de l'$\hat{I}$le rocheuse de Baek. Nous y voyons une cl$\acute{e}$ pour apprendre son relief marin et le processus de morphogen$\grave{e}$se des l'$\hat{I}$les m$\acute{e}$ridionales de Cor$\acute{e}$e du Sud. Le granit porphorique qui compose l'$\hat{I}$le rocheuse de Baek est une roche magmatique qui s'est form$\acute{e}$e il y a 60 million d'ann$\acute{e}$es. La cause principale de formation de l'$\hat{I}$le rocheuse de Baek, est une ligne de d$\acute{e}$lit vers le NE-SO et l'ENE-OSO, un soul$\grave{e}$vement de la plaque tectonique et une $\acute{e}$rosion par les vagues. L'$\hat{I}$le rocheuse de Baek pr$\acute{e}$sente un caract$\grave{e}$re d'$\acute{e}$ruption de magma de calc-alcalin par analyse g$\acute{e}$ochimique de son granit porphorique et fait partie du granit de l'arc volcanique. Il s'agit d'un magma qui s'est form$\acute{e}$ dans la subduction pr$\grave{e}$s du continent. Il est aussi n$\acute{e}$ssaire d'examiner un soul$\grave{e}$vement qui est plus $\acute{e}$lev$\acute{e}$ qu' un mouvement ascendant de la surface de la mer $\grave{a}$ l'$\grave{e}$re quaternaire environ de l'$\hat{I}$le rocheuse de Baek malgr$\acute{e}$ que, selon nous, nous y trouvions une faille et une terrasse marine.

• Proceedings of the Korean Magnestics Society Conference
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• 2003.06a
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• pp.138-139
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• 2003

• Journal of Nutrition and Health
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• v.37 no.9
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• pp.817-824
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• 2004

The purpose of this study was to analyze the intake of antioxidant vitamins and plasma TRAP concentrations of 60 maternal-infant pairs (30 in normal term delivery group, NT; 30 in preform group, PT) We also investigated the relationship between plasma TRAP levels of maternal-umbilical cord blood and pregnancy outcomes. Mean energy intakes of NT and PT pregnant women were 93.2% and 85.4% and their protein intakes were 113.3% and 110.9% of the recommended dietary allowance (RDA), respectively. The vitamin A intakes of NT and W pregnant women were 559.7 RE and 497.8 RE, which were less than RDA. While the vitamin E and C intakes of both NT and PT pregnant women were more than RDA. The maternal plasma TRAP level of PT was 1.41 mmol/l and that of was 1.50 mmol/l, which was significantly higher than TRAP level of PT (p < 0.05) . The umblical cord plasma TRAP levels of NT and PT were 1.44 mmol/l and 1.23 mmol/l, which indicates the significant difference between those two groups (p < 0.001) . In case of comparing the TRAP level of maternal and umbilical cord blood, there was no significant difference in NT pregnant women, however, in PT group maternal the TRAP level significant higher than that of umbilical cord (p < 0.001). The length of gestation and plasma TRAP level of maternal and umbilical cord showed a positive correlation. However, other parameters of pregnancy outcomes such as birth weight, weight gain, and Apgar score were not affected by the plasma TRAP levels. Based on these results, preform infants could have a risk of oxidative stress because of low plasma TRAP level.

• Culinary science and hospitality research
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• v.20 no.1
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• pp.133-142
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• 2014

The aim of this study was to evaluate the total phenol, total flavonoids contents and antioxidant activity of 80% ethanolic extract from Ixeris dentata Nakai(IDE) as well as to assess the lipid accumulation during adipogenesis of 3T3-L1 cells. The results demonstrated that the total phenolic and flavonoids contents of the IDE were $4.01{\pm}0.63$ GAE mg/g and $0.05{\pm}0.01$ RE mg/g, respectively. The antioxidative activities of the IDE were significantly increased in a dose dependent manner on DPPH(1,1-Diphenyl-2-picrylhydrazyl) radical scavenging, ABTS(2,2'-Azino-bis(3-ethylbenzothiazoline-6-sulfonic acid)diammonium salt) radical scavenging, reducing power value. During adipocyte differentiation, IDE significantly inhibited lipid accumulation compared with the control cells. These results indicated that the anti-adipogenesis effect of Ixeris dentata Nakai could be attributed to phenolic compounds that may potentially inhibit ROS(reactive oxygen species) production.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.39 no.12
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• pp.913-919
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• 2015

A supercavitating vehicle has a speed of more than 300 km/h in water. A numerical analysis of the flow around a supercavitating vehicle must deal with a multiphase flow consisting of the water, vapor and exhaust gas because the vehicle is powered by roket propulsion. The effect of the exhaust gas on the vehicle is an important part in the study of the performance of the supercavitating vehicle. In the present study, the effect of the exhaust gas on the drag of vehicle was investigated by conducting numerical analysis. When there is no exhaust gas, drag of vehicle is affected by re-entrant. In the case with rocket propulsion, the exhaust gas reduces the influence of re-entrant. The exhaust gas also creates Mach disk and it changes drag profile.

• The Korean Journal of Food And Nutrition
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• v.28 no.4
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• pp.643-649
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• 2015

This study was performed to determine the optimal month of harvest between May and July for wild peach (Prunus davidiana) by comparison of functional materials. The general composition, amino acid and vitamin (A, C, and E) content, and antioxidant activity were determined. With respect to the general composition of wild peach according to the month of harvest, wild peach harvested in May (HMP) and July (HJP) contained mostly carbohydrate, the contents of which amounted to 77.37 g/100 g and 77.92 g/100 g, respectively. The total amino acid content of HMP and HJP were 675.29 mg% and 573.25 mg%, respectively. Regarding the vitamin contents, vitamin A (retinol), E (${\alpha}-tocopherol$) and C in HMP were higher than those in HJP. The total polyphenol content of HMP (218.37 mg TAE/g) was higher than that of HJP (71.45 mg TAE/g). The total flavonoid content of HMP (64.95 mg RE/g) was also higher than that of HJP (32.67 mg RE/g). Moreover, the DPPH and ABTS radical scavenging activities ($IC_{50}$) were higher in HMP ($137.18{\mu}g/mL$ and $157.15{\mu}g/mL$) than those in HJP ($160.10 {\mu}g/mL$ and $186.01 {\mu}g/mL$), meaning that the former produces better antioxidant effects. It can be concluded that wild peach harvested in May contained higher functional materials such as vitamins and amino acids and had a higher antioxidant effect, than wild peach harvested in july.

• Membrane Journal
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• v.20 no.4
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• pp.342-350
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• 2010

Membrane distillation (MD) is a separation process which higher vapor pressure components are evaporated in mixed liquid solution through hydrophobic membrane with 0.1 or $0.5{\mu}m$ pore size. In this study, direct contact membrane distillation process for hollow fiber module were interpreted numerically using the "COMSOL Multiphysics" software. The variables for the system were temperatures and flow rates of lumen and shell side solutions. The permeate flux increased from 1.0 to $3.8L/m^2{\cdot}hr$ as temperature of the feed solution for lumen increased from 30 to $50^{\circ}C$. However the effect of shell solution temperature on permeate flux was relatively low. Also, the optimum velocity of lumen feed was obtained at 0.15 m/s ($Re_L=135$) by considering MD permeate flux as well as operating pressure loss.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.17 no.6
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• pp.144-150
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• 2018

In this study, the freezing process of L-shaped pipe exposed to the outside was investigated numerically by considering the mushy zone of freezing water. From the numerical results, it was found that the flow was outwardly directed due to the influence of the L-shaped bending part in the outside exposed part of the pipe, and the ice was formed in the shape of longitudinal corrugation on the wall surface of the pipe after the bending part. It is confirmed that this phenomenon is caused by the venturi effect due to the freezing as seen in connection with the velocity distribution in the pipe. It is found that the remelting phenomenon at the end of the freezing section occur simultaneously during the process of forming the ice in the pipe section. In regard of the factors affecting freezing, it was found that the thickness of the freezing layer is increased as the exposed pipe surface temperature is decreased, and the pipe surface temperature had a significant effect on the change of the freezing layer thickness. At the same time, it was found that the freezing layer becomes relatively thin when the water inflow rate is increased. This phenomenon was caused by reducing the exposure time of freezing water due to the vigorous flow convection of the water fluid.

• Korean Journal of Veterinary Service
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• v.45 no.1
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• pp.39-45
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• 2022

The total bacteria count is significantly important factor for hygienic quality in raw milk. BactoScan FM^TM and BactoCount IBC^TM are the automated instruments for the determination of the total bacterial count in raw milk. They have been used after calibration by standard plate count (SPC) method in South Korea since 2000. It is necessary to re-evaluate for total bacterial counter according to the improvement of milk quality and the change of milk quality grade. Therefore, this study was evaluated the conversion mode of the two machines by SPC method. We collected 921 bulk-tank milk samples throughout the concentration range of 1,000~1,000,000 CFU/mL from June 2020 to October 2021. As a result, when compared by the SPC value, there was a slight difference in total bacterial count in BactoScan below 10,000 CFU/mL and above 200,000 CFU/mL and in BactoCount above 100,000 CFU/mL, respectively. Therefore, the conversion factor for BactoScan and the conversion equation for BactoCount were newly adjusted based on SPC value, and then the correlation coefficients (R²) was 0.85 or higher. In addition, the correlation (R²) between BactoScan and BactoCount was 0.91, which means the results were high positive correlation. These results are expected to contribute to improving the accuracy of the automated instruments for determining of total bacterial count in raw milk.

• Bulletin of the Korean Mathematical Society
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• v.57 no.4
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• pp.1003-1031
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• 2020

We consider the following Dirichlet initial boundary value problem with a gradient absorption and a nonlocal source $$\frac{{\partial}u}{{\partial}t}-div({\mid}{\nabla}u{\mid}^{p-2}{\nabla}u)={\lambda}u^k{\displaystyle\smashmargin{2}{\int\nolimits_{\Omega}}}u^sdx-{\mu}u^l{\mid}{\nabla}u{\mid}^q$$ in a bounded domain Ω ⊂ ℝ^N, where p > 1, the parameters k, s, l, q, λ > 0 and µ ≥ 0. Firstly, we establish local existence for weak solutions; the aim of this part is to prove a crucial priori estimate on |∇u|. Then, we give appropriate conditions in order to have existence and uniqueness or nonexistence of a global solution in time. Finally, depending on the choices of the initial data, ranges of the coefficients and exponents and measure of the domain, we show that the non-negative global weak solution, when it exists, must extinct after a finite time.