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고속액체크로마토그래피를 이용한 항원충제 분석법 개발: 톨트라주릴 및 디클라주릴
정경훈,정미영,박해철,아킬후세인,김대균,이광직,강정우,Jeong, Kyung Hun,Jeong, Miyoung,Park, Hae-Chul,Hossain, Md Akil,Kim, Daegyun,Lee, Kwang-Jick,Kang, Jeong Woo 대한수의학회 2017 大韓獸醫學會誌 Vol.57 No.4
This study was undertaken to develop new analytical methods for assessment of anticoccidials. High-performance liquid chromatography (HPLC) was found to be a fast, reliable, and practical method. The anticoccidials used in this experiment were toltrazuril and diclazuril, and the analysis factors were specificity, linearity, accuracy, repeatability, and intermediate precision. The linearity of each anticoccidial was better than 0.99, and the accuracies were 99.5% and 99.1% with relative SD of 0.5 and 0.4, respectively. To assess whether the developed HPLC method could be effectively applied, toltrazuril and diclazuril post-market veterinary products (five products) that are currently sold were tested. The results revealed no non-compliant items and the method was applied successfully. Therefore, the newly developed HPLC method for anticoccidial assessment described in this study may be useful as a reference method in the Korean Standards of Veterinary Pharmaceuticals for the analysis of toltrazuril and diclazuril.
Taewon Kang(강태원),Changwoo Kim(김창우),Yongsug Suh(서용석),Hyeoncheol Park(박현철),Byungil Kang(강병익),Daegyun Kim(김대균) 전력전자학회 2011 전력전자학술대회 논문집 Vol.2011 No.7
This paper presents a simple and cost-effective stand-alone rapid battery charging system of 30kW for electric vehicles. The proposed system mainly consists of active front-end rectifier of neutral point clamped 3-level type and non-isolated bi-directional dc-dc converter of multi-phase interleaved half-bridge topology with coupled inductors. The charging system is designed to operate for both lithium-polymer and lithium-ion batteries. The complete charging sequence is made up of three sub-interval operating modes; pre-charging mode, constant-current mode, and constant-voltage mode. The pre-charging mode employs the staircase shaped current profile to accomplish shorter charging time while maintaining the reliable operation of the battery. The proposed system is able to reach the full-charge state within less than 16min for the battery capacity of 8kWh by supplying the charging current of 67A. The optimal discharging algorithm for Vehicle to the Grid (V2G) operation has been adopted to maintain the discharging current of 1C. Owing to the simple and compact power conversion scheme, the proposed solution has superior module-friendly mechanical structure which is absolutely required to realize flexible power expansion capability in a very highcurrent rapid charging system.