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DNA 분석을 통한 한우 , 연변황우 및 화우의 유전적 특성
신원집,여정수,김재우,신수길,정진우,이지홍 한국축산학회 1999 한국축산학회지 Vol.41 No.4
This study was conducted to identify the genetic parameters and genetic relationships among 3 cattle breeds of Hanwoo (Korea), Yanbian yellow cattle (China), and Wagyu (Japan). DNA fingerprinting was prepared using M13 probe and Pst 1 enzyme. Genetic homogencities of Hanwoo and Yanbian yellow cattle were comparatively lower than that of Wagyu, suggesting genetic improvement by active breeding program for Wagyu compared to Hanwoo and Yanbian yellow cattle and possibility of improvement capacity for Hanwoo and Yanbian yellow cattle. Genetic similarities between breeds were not significantly different among them, suggesting that these 3 breeds have been raised independently without any inflow or outflow of gene source for a while.
Cha, J. W.,Piao, M. J.,Kim, K. C.,Zheng, J.,Yao, C. W.,Hyun, C. L.,Kang, H. K.,Yoo, E. S.,Koh, Y. S.,Lee, N. H. HUMANA PRESS INC 2014 Applied biochemistry and biotechnology Vol.172 No.5
The aim of the present study was to elucidate the protective properties of 3,4-dihydroxybenzoic acid (DBA) isolated from Cladophora wrightiana Harvey (a green alga) against ultraviolet B (UVB)-induced damage to human HaCaT keratinocytes. DBA exhibited scavenging actions against the 1,1-diphenyl-2-picrylhydrazyl radical, the superoxide anion, and the hydroxyl radical. Furthermore, DBA decreased the levels of intracellular reactive oxygen species generated by hydrogen peroxide or UVB treatment of the cells. DBA also decreased the UVB-augmented levels of phospho-histone H2A.X and the extent of comet tail formation, which are both indications of DNA damage. In addition, the compound safeguarded keratinocytes from UVB-induced injury by reversing the production of apoptotic bodies, overturning the disruption of mitochondrial membrane potential, increasing the expression of the anti-apoptotic protein, B-cell lymphoma 2, and decreasing the expression of the pro-apoptotic proteins, Bcl-2-associated X and cleaved caspase-3. Taken together, these results demonstrate that DBA isolated from a green alga protects human keratinocytes against UVB-induced oxidative stress and apoptosis.
POSTERS / PW-093 : GLUCOCORTICOID ENHANCES TPA - DEPENDENT INDUCTION OF VIMENTIN mRNA IN HL-60 CELLS
(Y . C . Lee),(K . A . Yun),(T . W . Kang),(M . Y . Son),(M . Z . Zheng),(B . D . Hwang),(K . Lim),(W . H . Yoon),(Y . J . Jung),(S . I . Jung),(B . H . Lee) 한국생화학분자생물학회 (구 한국생화학회) 1999 6th IUBMB SEOUL CONFERENCE Vol.- No.-
The classification construction and the non-isomorphism counting of symmetric Latin square
H. Meng,Y. Zheng,Y. Zheng 장전수학회 2008 Advanced Studies in Contemporary Mathematics Vol.17 No.2
In this paper, some characters of symmetric Latin square of even order are studied , and the classification construction methods are provided. At the same time, it introduce the definition of isomorphism of Latin square. Isomorphism classes and count for non-isomorphism to symmetric Latin square. It has been written the program of this algorithm by C++ language. In this algorithm. Backtracking is used to generate the symmetric Latin square. Especially, the special properties on the main diagonal line is used, which speed the algorithm. And it got all of the isomorphism classes elements of representative and the number of non-isomorphism classes.
EXPERIMENTAL STUDY ON REGENERATING FOULED EGR COOLER BY NTPI TECHNOLOGY
Y. Y. CHEN,Y. X. CAI,X. H. LI,Y. X. SHI,Y. ZHENG 한국자동차공학회 2015 International journal of automotive technology Vol.16 No.2
In order to investigate the regeneration effect of non-thermal plasma injection (NTPI) technology on fouled exhaust gas recirculation (EGR) cooler, NTPI regeneration apparatus and EGR cooler performance test system were built up. Results showed that non-thermal plasma (NTP) could peel off the deposit layer and improve the heat exchange performance effectively. The carbon removal energy efficiency of this NTPI regeneration setup was 22.46 g/kWh and the O3 utilization ratio was 96.50%. To get a deeper understanding of the regeneration effect, thermo-gravimetric analysis (TGA) and Fourier transform infrared spectroscopy (FTIR) were introduced to investigate the variation of deposit layer’s physical and chemical characteristics before and after regeneration. Results showed that the content of soluble organic fraction (SOF) in deposit specimen decreased obviously, mainly because the carbonyls were effectively removed by NTP. Moreover, soot in deposit specimen was successfully activated by NTP.
EXPERIMENTAL STUDY OF EGR COOLER REGENERATION AIDED BY OXYGEN-FED NTP AND AIR-FED NTP
Y. X. SHI,Y. ZHENG,Y. X. CAI,W. J. LI,H. XU 한국자동차공학회 2016 International journal of automotive technology Vol.17 No.3
Based on non-thermal plasma (NTP) technology fed by oxygen and air as the gas source respectively, the experimental system of exhaust gas recirculation (EGR) cooler regeneration was built to do a study at different regeneration temperatures. By measuring the concentration of main active substance and COx in regeneration process, the influence of temperature on regeneration aided by oxygen-fed NTP and air-fed NTP was investigated. The experimental results indicate that EGR cooler can be regenerated both by air-fed NTP and oxygen-fed NTP at a wide temperature range of 18 oC ~ 300 oC. By comparison of the regeneration with oxygen-fed NTP and air-fed NTP, it can be easily known that the regeneration effect is most remarkable at 150 oC with oxygen-fed NTP and at 120 oC with air-fed NTP. In addition, when the temperature is below 150 oC especially at 120 oC, the regeneration efficiency of air-fed NTP is lower than oxygen-fed NTP, nevertheless, when the temperature is above 150 oC, air-fed NTP has a superiority in regeneration and the higher the temperature is, the more obvious the superiority will be.
A Numerical Method to Optimize the Structure of a Magneto-Optical Disk
Y.-X. Zheng,J. H. Qiu,L. Y. Chen,. Y. Wang 한국물리학회 2005 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.46 No.2
In magneto-optical (MO) data storage, data are recorded by different magnetization directions of magnetic domains and reproduced by the magneto-optical Kerr effect. Recently, the areal density of MO storage has been demonstrated to reach 100 Gbit/in2. In order to achieve high performance for an MO disk, it is required to get a high MO signal by carefully choosing the structure parameters and material parameters. In this paper, we propose a numerical method to optimize the structure parameters for an MO disk.
Reflective metamaterial polarization converter in a broad frequency range
Zheng, H. Y.,Yoo, Y. J.,Kim, Y. J.,Lee, Y. P.,Kang, J. H.,Kim, K. W.,Nikitov, S. A. 한국물리학회 2014 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol. No.
We propose a broadband reflective metamaterial polarization converter which is composed of arrays of split-ring resonators (SRRs), a dielectric layer and a continuous metallic layer. For the case of a loss-free dielectric layer, the average transformation rate is around 90% at frequencies from 6.68 to 10.91 GHz, and the bandwidth is 56.66% of the central wavelength. The increased loss tangent of the dielectric layer is shown to induce a reduced transformation rate due to enhanced absorption.