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항균제로서 Sulfa - drug dl 치환된 Chitosan 유도체 합성에 관한 연구
류성렬(Seong Ryeol Ryu),김종식(Jong Sik Kim),박노동(Ro Dong Park) 한국키틴키토산학회 2001 한국키틴키토산학회지 Vol.6 No.2
N/A Highly efficient method for synthesis of antibacterial chitosan polymer drugs that is suitable for treatment agent of fish disease. This drug was prepared from the reaction of sulfa-drug derivatives which corresponds with chloroacetaldehyde and methylenediphenyl 4,4`-diisocyanate. The sulfa-drugs derivatives in 2% acetic acid solution were stirring with alcolic condition for 6hrs under nitrogen to give sulfa-drug contained considered chitosan derivatives chitosan-N-methyleneylsulfadiazine derivatives(2,3,4) were isolation by recrystallization. We considered chitosan derivatives were useful especially for antibacterial drugs and agricultural part.
이일규,류성렬,오승엽,홍헌진,Lee, Il-Kyoo,Ryu, Seong-Ryeol,Oh, Seung-Hyeub,Hong, Heon-Jin The Korea Institute of Information and Commucation 2007 정보와 통신 Vol.24 No.3
This paper describes the RF performance issues of UE RF Transceiver for W-CDMA system based on 3GPP specifications. the parameters of transmitter and receiver are derived from the viewpoint of RF performance. In order for UE to achieve high performance, the transceiver performance requirements such as ACIR, EVM, Peak Code Domain Error, spectrum emission mask, frequency error stability and TX power control dynamic range for transmitter and reference sensitivity level, blocking characteristics, noise figure, ACS, linearity, AGC dynamic range for receiver are considered. On the basis of the required parameters, the UE RF transceiver is designed and then implemented. The evaluation of RF performance is accomplished through practical test scenarios.