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Rat H-Y 항체에 의한 생쥐 Embryo 의 성 조절에 관한 연구 1 . H-Y 항체의 처리가 생쥐 상실배 (桑實胚) 의 발달에 미치는 영향 및 세포독성시험
정장용(J . Y . Jeung),박충생(C . S . Park),박희성(H . S . Park) 한국축산학회 1989 한국축산학회지 Vol.31 No.8
This experiment was carried out to develop a new technique by immunological method. H-Y antiserum was prepared in inbred Wistar female rats by repeated immunization with new-born testis supernatant and spleen cells from males of the same strain. The activity of H-Y antibody in antiserum was tested by cytotoxicity and biological tests. The results obtained in this experiment. are as follows: In the sperm cytotoxicity test it was showed about 70% of the sperm were dead in the 1/2 to 1/8 dilution of H-Y antiserum immunized with spleen cells, new-born testis or the compound of both antigens. As the dilution increased, the death rate of sperm decreased markedly. H-Y antibody absorbed with female-rat spleen cells showed higher death-rate of sperm than that with male-rat spleen cells. The normal female-rat serum showed the sperm death-rate of 14.6 to 27.9% irrespective of the dilution rate. The difference between the two sperm death-rates was significant. The embryos cultured in the medium of complement and H-Y antiserum immunized with male-rat spleen, new-born testis or the compound of both antigens showed the lysis-rates of 48.9, 50.0 and 46.3% respectively. There was no significant difference among each lysis-rate. But the lysis-rate of the embryos cultured in the medium of complement and normal female rat serum was 5.1% and it was markedly different from the above lysis rates(p $lt;0.001).
Rat H - Y 항체에 의한 생쥐 Embryo 의 성 조절에 관한 연구 Ⅲ. H - Y 항혈청에 의한 BALB c 생쥐 상실배의 성 판별
정장용(J . Y . Jeung),박충생(C . S . Park),박희성(H . S . Park) 한국축산학회 1989 한국축산학회지 Vol.31 No.10
This experiment was carried out to develop a new technique by identifying XX-bearing embryos prior to implantation by immunological method. H-Y antiserum was prepared in inbred Wistar female rats by repeated immunization with spleen cells from males of the same strain. The reactivity of H-Y antibody was confirmed by culturing mouse embryos in the medium containing H-Y antiserum and complement obtained from the guinea pig. The optimal condition for the activity of H-Y antibody was also investigated by culturing embryos under the various conditions of equilibration times, complement concentrations and various media. The results obtained in this experiment are as follows: When the embryos were cultured in the medium of H-Y antiserum and complement which was given the equilibration time of less than 30 minutes in CO₂ incubator, the lysis-rate of embryo was 89.3%. The embryo lysis-rates in the equilibration time of 1-1.5, 3-3.5, or 24-26 hours were 48.1, 47.7 and 48.2%, respectively. When the concentration rate of complement to H-Y antiserum varied from 0.25 - 4.0, the lysis-rate of embryo was 43.2 to 52.7%. The concentration rate of complement did not influence the lysis-rate of embryos. The meda of D-PBS + 0.3% BSA, D-PBS + 20% FCS, Ham`s F-10 + 0.3% BSA and Ham`s F-10 + 20% FCS showed the embryo lysis-rate of 46.4, 57.4, 49.3 and 49.1%, respectively. The culture media used in this experiment did not show any significant difference in the embryo lysis-rate. After the embryos were cultured to the late blastocyst in the media of D-PBS + NGPS + H-Y antiserum or D-PBS + NGPS + normal female rat serum the normally developed embryos were selected and transferred to the pseudo pregnant recipients. The percentages of their female offspring were 82.3%(14/17) in H-Y antiserum treatment and 53.6%(15/28) in normal serum treatment and showed a significant difference between the two treatments(p $lt;0.001).
Machining of the KSTAR TF coil structure
K. H. Hong,C. H. Choi,D. H. Park,D. K. Hur,H. Sin,H. K. Park,H. T. Kim,J. H. Won,J. H. Lim,J. M. Chung,박주식,J. W. Sa,J. Y. Song,N. G. Kim,S. H. Hwang,Y. D. Chu,Y. G. Song 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.III
The KSTAR Toroidal Field (TF) magnet system consists of 16 TF structures. Each structure must be machined for precise assembly and reducing error field. Dimensions of the structure are a height of 4.5 m and a width of 3.2 m. The allowable tolerance of the structure is ±1 2 mm, and that of the bolt hole for Poloidal Field (PF) coil basement is ±0.5 mm. The final machining of the structure is also important for assembly of the interface structures such as toroidal ring, PF coil structures, and Central Solenoid (CS) structure. Before coil encasing, the inside surface of the structure is machined. Most of the outer surface of the structure, except for the surface of the intercoil structure (ICS), is machined after final welding. In particular, the side surface of an inboard leg, the connection plate of the ICS, the toroidal ring basement, the PF structure basements, shear key holes, and conical bolt holes are precisely machined. Fabrication and assembly tolerances are absorbed by the thickness of the electrical insulation, the spacer of the shear key, and the taper ring of the conical bolt. Six TF coil structures have been assembled and two structures are waiting for assembly. Another three structures are under final machining. A laser tracker is used for three dimensional survey and measurement of the structure.
박석인(S. Park),한수빈(S. Han),정학근(H. Jeong),정봉만(B. Jung),유승원(S. Yu),송유진(Y. Song) 한국조명·전기설비학회 2005 한국조명·전기설비학회 학술대회논문집 Vol.2005 No.5월
Offline switching power supplies have high voltage and high current switching waveforms that generate Electromagnetic Interference(EMI) in the form of both conducted and radiated emissions. Consequently, all off-line power supplies must be designed to attenuate or suppress EMI emissions below commonly acceptable limits. Electrodeless fluorescent lamp"s ballasts have AC/DC flyback converter, so we must control the EMI emissions.
전자식 커플링 Wheel Shaft의 랙 전조 유한요소해석
박세제(S. J. Park),김동환(D. H. Kim),김영환(Y. H. Kim),박인돈(I. D. Park),김병민(B. M. Kim) 한국소성가공학회 2012 한국소성가공학회 학술대회 논문집 Vol.2012 No.10
This paper research interpretive method about thread rolling for wheel shaft. Firstly, the analysis is focused on the effective analysis conditions that guarantee the reliability of the analysis time. The investigated parameters are the shape of modeling and the analysis method. Using the results, capable of reducing for analysis time to optimum of form rolling that guarantee the results are found. This paper presented thread rolling process analysis of method that has not been much research on the domestic.