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Brazing in SiH4-doped inert gases: A new approach to an environment friendly production process
Ulrich Holländer,Daniel Wulff,André Langohr,Kai Möhwald,Hans Jürgen Maier 한국정밀공학회 2020 International Journal of Precision Engineering and Vol.7 No.6
Engineering under protective atmospheres or in vacuum allows the production of materials and components, where the absence of oxygen is an essential requirement for a successful processing. Ideally, joining or coating of (and with) metallic materials needs oxide free material surfaces, in order to achieve durable joints or coatings. Using the established technology of brazing in controlled atmosphere, fundamental physical mechanisms for deoxidation of metal surfaces are presented and the role of oxygen and water residue in the process atmosphere is analyzed. Furthermore, the doping of gases with monosilane for generating virtually oxygen-free process atmospheres is introduced and its advantages for an oxygen-free production are discussed.
Sejla Abdic,Nicholas J. Van Osch,Daniel G. Langohr,James A. Johnson,George S. Athwal 대한견주관절의학회 2023 대한견주관절의학회지 Vol.26 No.2
Background: Preoperative traditional software planning (TSP) is a method used to assist surgeons with implant selection and glenoid guide-pin insertion in shoulder arthroplasty. Mixed reality (MR) is a new technology that uses digital holograms of the preoperative plan and guide-pin trajectory projected into the operative field. The purpose of this study was to compare TSP to MR in a simulated surgical environment involving insertion of guide-pins into models of severely deformed glenoids. Methods: Eight surgeons inserted guide-pins into eight randomized three-dimensional-printed severely eroded glenoid models in a simulated surgical environment using either TSP or MR. In total, 128 glenoid models were used and statistically compared. The outcomes compared between techniques included procedural time, difference in guide-pin start point, difference in version and inclination, and surgeon confidence via a confidence rating scale. Results: When comparing traditional preoperative software planning to MR visualization as techniques to assist surgeons in glenoid guide pin insertion, there were no statistically significant differences in terms of mean procedure time (P=0.634), glenoid start-point (TSP=2.2±0.2 ㎜, MR=2.1±0.1 ㎜; P=0.760), guide-pin orientation (P=0.586), or confidence rating score (P=0.850). Conclusions: The results demonstrate that there were no significant differences between traditional preoperative software planning and MR visualization for guide-pin placement into models of eroded glenoids. A perceived benefit of MR is the real-time intraoperative visibility of the surgical plan and the patient’s anatomy; however, this did not translate into decreased procedural time or improved guide-pin position.
A case of canine leishmaniasis in Korea
Hyunkyoung Lee,Kyunghyun Lee,Jae-Won Byun,Soon-Seek Yoon,Jung-Won Park,MyoungHeon Lee,Eun-Jin Choi,ByungJae So,Dae-Young Kim,Matti Kiupel,Ingeborg M. Langohr,You-Chan Bae 한국예방수의학회 2015 예방수의학회지 Vol.39 No.3
A 26-month-old male mixed-breed dog of Korean origin was subjected to necropsy following death after a history of decreased appetite and weight loss. Necropsy revealed generalized lymphadenopathy and splenomegaly. Histopathological examination of samples from the spleen, mandibular lymph nodes, liver, kidney, and large intestine showed granulomas with numerous macrophages containing intracytoplasmic Leishmania amastigotes. Transmission electron microscopy revealed Leishmania amastigotes in the macrophage cytoplasm. All tissues with granulomas were positive for Leishmania spp, which was confirmed to be Leishmania infantum by conventional polymerase chain reaction (PCR), real-time PCR, and in situ hybridization. To our knowledge, this is the second case of canine visceral leishmaniasis in Korea.
Congenital Neosporosis in Goats from the State of Minas Gerais, Brazil
Mary S. Varaschin,Christian Hirsch,Flademir Wouters,Karen Y. Nakagaki,Antonio M. Guimaraes,Domingos S. Santos,Pedro S. Bezerra Jr,Rafael C. Costa,Ana P. Peconick,Ingeborg M. Langohr 대한기생충학열대의학회 2012 The Korean Journal of Parasitology Vol.50 No.1
Short communication : A case of canine leishmaniasis in Korea
( Hyunkyoung Lee ),( Kyung Hyun Lee ),( Jae Won Byun ),( Soon Seek Yoon ),( Jung Won Park ),( Myoungheon Lee ),( Eun Jin Choi ),( Byungjae So ),( Dae Young Kim ),( Matti Kiupel ),( Ingeborg M. Langohr 한국예방수의학회(구 한국수의공중보건학회) 2015 예방수의학회지 Vol.39 No.3
A 26-month-old male mixed-breed dog of Korean origin was subjected to necropsy following death after a history of decreased appetite and weight loss. Necropsy revealed generalized lymphadenopathy and splenomegaly. Histopathological examination of samples from the spleen, mandibular lymph nodes, liver, kidney, and large intestine showed granulomas with numerous macrophages containing intracytoplasmic Leishmania amastigotes. Transmission electron microscopy revealed Leishmania amastigotes in the macrophage cytoplasm. All tissues with granulomas were positive for Leishmania spp, which was confirmed to be Leishmania infantum by conventional polymerase chain reaction (PCR), real-time PCR, and in situ hybridization. To our knowledge, this is the second case of canine visceral leishmaniasis in Korea.