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김재윤,서용원,장철성,D. S. Kim,김대연,J. B. Kim,K-R Kim 한국물리학회 2007 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.50 No.I
Wheat mutants generated from a cultivar ``Geumgangmil"by using a $^{60}$Co source (gamma-ray) were developed for bentazone (3-isopropyl-2,1,3-benzo-thiadiazin-4-one-2,2-dioxide) resistance. Resistant M$_2$ plants were selected from seedlings and adult plants consecutively. Bentazone-resistant wheat plants were able to survive at up to 10 times (1,600 ppm) the commercially recommended concentration. The four plants with the highest bentazone resistance were selected. An AFLP (amplified fragment length polymorphism) analysis was applied to identify molecular markers for bentazone-resistant wheat mutants. Twelve polymorphic products, which were unique to bentazone-resistant plants, were identified, cloned, and sequenced. Among the twelve polymorphic bands, eight Sequence-tagged Sites (STS) primer sets were designed. Only one STS primer set (HRMW-08) was converted a ``Bentazone-resistant wheat-specific" STS marker. The wheat mutants and markers that we obtained could be employed in a cross-breeding program incorporated with marker assisted selection (MAS) in the early stages of population segregation.
김재윤,김경식,김석윤 ( J . Y . Kim,K . S . Kim,S . Y . Kim ) 한국열처리공학회 1996 熱處理工學會誌 Vol.9 No.4
The direct reaction method has been used for the fabrication of Al-Mg/Al₂O₃functionally gradient materials. It was found that the reaction layer of the Al-Mg/Al₂O₃powder compact at 900℃ under air atmosphere led to the formation of reaction layers with varying ceramic phase contents. As the results of experiments by using the TGA system, the characteristics and growth behavior of the reaction layers were affected by the reaction temperature, the gas flow rate, the Mg contents and the Al₂O₃contents.
미끄럼 거리에 따른 STS 304 스테인리스강의 마멸기구 변화
김재윤(J. -Y. Kim),권혁우(H. Gwon),정영중(Y. -J. Jeong),김고남(G. Kim),김명곤(M. G. Kim),김용석(Y. -S. Kim) 한국소성가공학회 2012 한국소성가공학회 학술대회 논문집 Vol.2012 No.10
In this paper, sliding wear tests of the 304 stainless steels were performed at room temperature varying sliding distance and applied load using a pin-on-disk wear tester. Worn surfaces and wear debris were analyzed using an XRD and observed by an SEM. Micro Vickers hardness was also measured as a function of depth from the worn surface to evaluate work hardening during the wear. Test results showed that the wear mode changed from mild wear to severe plasticity dominated wear (metallic particle oxidation, adhesive wear) as the sliding distance and the applied load increased. The change in the wear mechanism was associated with subsurface plastic deformation and work-hardening. Strain-induced martensitic transformation was observed on the sliding surface of the austenitic stainless steel. Relationship between the transformation and the work-hardening was explored and discussed.