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Jingbin Zeng,Jinmei Chen,Wenfeng Chen,Xiaoli Huang,Liangbi Chen,Xi Chen 한국식품과학회 2009 Food Science and Biotechnology Vol.18 No.3
Solid-phase microextraction (SPME) has gained widespread acceptance in sample pretreatment due to its solventfree and easy-to-operate properties. SPME fibers are considered as a key part of SPME technique, since it primarily determines the extraction performance of the method including sensitivity, selectivity, and reproducibility. Generally speaking, target analyte with different chemical property requires fiber coating that has the best affinity towards it. Due to the lack of varieties of commercial fibers available currently, considerable efforts have been recently made to develop tailor-made fibers to fulfill increasing demands of different analysis. This paper concisely classify some SPME fiber preparation approaches such as solgel technology, physical deposition, molecularly imprinted technique, and their respective application in food safety analysis.
THE PROBLEM SEVING ENERGY ABOUT INDUCTION MOTOR BY VECTOR CONTROL
Jiaju WU,Niubao WANG,Chenggong ZHAN,Yian ZHANG,Wenfeng ZENG 전력전자학회 1995 ICPE(ISPE)논문집 Vol.1995 No.10
In this article we disscuss energy saving problems, about Induction motor by vector control system based on siip -angular frequency control type. We should consider comprehensive factors such as load current,velocity and so on in order to optimum energy saving effects.