• Asian-Australasian Journal of Animal Sciences
• /
• 제18권4호
• /
• pp.567-573
• /
• 2005

This study aims to evaluate the antioxidative activities of cow-milk kefir and goat-milk kefir. Antioxidative mechanisms, including radical-scavenging effects, ferrous-ion chelating ability, reducing power and antioxidant activity, were investigated herein. Kefirs demonstrated significantly greater scavenging effects upon 1,1-diphenyl-2-picrylhydrazyl (DPPH) and superoxide radicals, an inhibition effect upon linoleic-acid peroxidation, and more substantial reducing power, but reduced glutathione peroxidase (GSH-Px) activity than was the case for milks. There was no significant difference between milks and kefirs as regards ferrous-ion chelating ability and superoxide dismutase (SOD) activity. These findings have demonstrated that kefirs possess antioxidant activity, thereby suggesting that kefirs are potential candidates for the role of useful natural antioxidant supplements for the human diet.

• 동력기계공학회지
• /
• 제17권5호
• /
• pp.38-43
• /
• 2013

In order to design a wave energy generating system, a 6-DOF analysis technique is applied to CFD analysis on of a floating body and the behavior is interpreted according to the nature of the incoming waves. A spring constant is adopted to control the motion of multi floating bodies and to calculate the total average power absorption. Three cases of different wavelengths namely 20D, 30D and 40D have been modeled to analyze the total average power absorption. The average power absorption not only varies with the position of the floating body but also varies with wavelength. From the results obtained, it is concluded that the maximum total average power absorption is 9W approximately in wavelength 30D and the minimum total average power absorption is 4.3W approximately in wavelength 40D.

• 한국정보디스플레이학회:학술대회논문집
• /
• 한국정보디스플레이학회 2007년도 7th International Meeting on Information Display 제7권1호
• /
• pp.882-885
• /
• 2007

This study discussed the effect of ink adhesion on color filter glass after different kinds of plasma treatment. From contact angle analysis, we could get different ink adhesion results after HMDSZ, $O_2$, IPA, and $CF_4$ plasma treatment. Substrates after PFMCH plasma treatment have good surface hydrophobic property, and contact angle raise from $<10^{\circ}\;to\;50^{\circ}$.

• Advances in environmental research
• /
• 제1권3호
• /
• pp.191-199
• /
• 2012

A kinetic study of the transesterification of soybean oil was conducted using microwaves under various temperatures, power densities, and reaction times. Results show that power density affects the kinetics and yield. The biodiesel yield increased with increasing microwave power density. The non-thermal effects of microwave irradiation on transesterification reactions were evaluated at a constant reaction temperature ($65^{\circ}C$) and power density (0.204 $Wg^{-1}$). Microwave irradiation was found to increase the reaction rates by 3.52-7.06 fold.

• Membrane and Water Treatment
• /
• 제3권1호
• /
• pp.51-62
• /
• 2012

The permeate flux declination along an ultrafilter membrane is due mainly to the concentration-polarization resistance increment and the decline in transmembrane pressure. It was found in previous works that the concentration polarization resistance could be reduced in a ring-rod tubular membrane ultrafilter using the turbulent behavior. In the present study, the performance was further improved by properly and gradually decreasing the baffled-ring distance along the cross-flow channel coupled with properly adjusting the number of baffled rings. This theoretical analysis is based on the mass and momentum balances as well as the application of the resistance-in-series model. The correlation predictions are confirmed with the experimental results for dextran T500 aqueous solution ultrafiltration.

• Geomechanics and Engineering
• /
• 제21권6호
• /
• pp.527-536
• /
• 2020

An elastic-plastic solution for cavity expansion problem considering strength degradation, undrained condition and initial anisotropic in-situ stress is established based on the Tresca yield criterion and cavity expansion theory. Assumptions of large-strain for plastic region and small-strain for elastic region are adopted, respectively. The initial in-situ stress state of natural soil mass may be anisotropic caused by consolidation history, and the strength degradation of soil mass is caused by structural damage of soil mass in the process of loading analysis (cavity expansion process). Finally, the published solutions are conducted to verify the suitability of this elastic-plastic solution, and the parametric studies are investigated in order to the significance of this study for in-situ soil test.

• JSTS:Journal of Semiconductor Technology and Science
• /
• 제15권3호
• /
• pp.356-364
• /
• 2015

The transmission performance of TSV considering the effect of electronic-thermal coupling is an new challenge in three dimension integrated circuit. This paper presents the thermal equivalent circuit (TEC) model of the TSV, and discussed the thermal equivalent parameters for TSV. Si layer is equivalent to transmission line according to its thermal characteristic. Thermal transient response (TTR) of TSV considering electronic-thermal coupling effects are proposed, iteration flow electronic-thermal coupling for TSV is analyzed. Furthermore, the influences of TTR are investigated with the non-coupling and considering coupling for TSV. Finally, the relationship among temperature, thickness of $SiO_2$, radius of via and frequency of excitation source are addressed, which are verified by the simulation.

• International Journal of Advanced Culture Technology
• /
• 제11권1호
• /
• pp.74-81
• /
• 2023

Based on the hypothesized model and the data obtained from the questionnaire, this paper analyzed the data using the statistical analysis software SPSS 25.0 and AMOS 20.0 to empirically prove the relationship between the variables of transformational leadership, organizational support, organizational justice, and employee engagement. It was found that: First, transformational leadership has a significant positive effect on employee commitment; Second, transformational leadership has a significant positive effect on perceived organizational support. Third, perceived organizational support has a significant effect on employee commitment; Fourth, in the relationship between transformational leadership and employee commitment, the mediating effect of perceived organizational support on them holds; At last, organizational justice plays a moderating role in the relationship between transformational leadership and the perceived organizational support. This study enriches and integrates the theoretical systems and research categories of employee engagement, organizational justice, transformational leadership, and perceived organizational support.

• 한국의사학회지
• /
• 제34권1호
• /
• pp.1-9
• /
• 2021

Uihakyimmun (醫學入門) was written around 1580 by Li Ting (李梴) during the Ming Dynasty of China. Later, during the mid-Joseon period, Uihakyimmun (醫學入門) was introduced to Joseon and is believed to have contributed to the development of Joseon medicine. The importance of this Uihakyimmun (醫學入門) was especially evident as it was designated as a textbook for medical examination in the late Joseon Dynasty. This paper examines the process of Uihakyimmun (醫學入門) being introduced into Joseon based on historical records. It also considered the reason why Medical Education was selected as the textbook for the medical examination instead of Donguibogam (東醫寶鑑). As a result, it was widely read by court doctors before being selected as a test textbook, and gradually became a formal textbook after being used in informal tests. In addition, it was revealed through historical records that the reason why Uihakyimmun (醫學入門) was chosen instead of Donguibogam (東醫寶鑑) was because Uihakyimmun (醫學入門) fit better with Confucian values.

• Asian-Australasian Journal of Animal Sciences
• /
• 제28권12호
• /
• pp.1774-1783
• /
• 2015

Milk lysozyme is the ubiquitous enzyme in milk of mammals. In this study, the cDNA sequence of a new chicken-type (c-type) milk lysozyme gene (YML), was cloned from yak mammary gland tissue. A 444 bp open reading frames, which encodes 148 amino acids (16.54 kDa) with a signal peptide of 18 amino acids, was sequenced. Further analysis indicated that the nucleic acid and amino acid sequences identities between yak and cow milk lysozyme were 89.04% and 80.41%, respectively. Recombinant yak milk lysozyme (rYML) was produced by Escherichia coli BL21 and Pichia pastoris X33. The highest lysozyme activity was detected for heterologous protein rYML5 (M = 1,864.24 U/mg, SD = 25.75) which was expressed in P. pastoris with expression vector $pPICZ{\alpha}A$ and it clearly inhibited growth of Staphylococcus aureus. Result of the YML gene expression using quantitative polymerase chain reaction showed that the YML gene was up-regulated to maximum at 30 day postpartum, that is, comparatively high YML can be found in initial milk production. The phylogenetic tree indicated that the amino acid sequence was similar to cow kidney lysozyme, which implied that the YML may have diverged from a different ancestor gene such as cow mammary glands. In our study, we suggest that YML be a new c-type lysozyme expressed in yak mammary glands that plays a role as host immunity.