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C−N bond formation is regarded as a very useful and fundamental reaction for the synthesis of nitrogen‐containing molecules in both organic and pharmaceutical chemistry. Noble‐metal and homogeneous catalysts have frequently been used for C−N bond formation, however, these catalysts have a number of disadvantages, such as high cost, toxicity, and low atom economy. In this work, a low‐toxic and cheap...
LTE-Advanced technology is required to support 100MHz channel bandwidth and transfer rates in excess of 1Gbps. The 2.6GHz band is one of the core band of LTE-Advanced technology. This paper provide the detailed design of the RF front-end. The receiver uses the traditional double-conversion superheterodyne structure, while transmitter uses a zero-IF structure, able to obtain high receiver sensitivity...
This paper is concerned with the adsorption of Cr(III) by natural zeolite and polymeric Al/Fe (PAFC) modified one. The effects of the kind of zeolite, surging time, initial concentration of Cr(III), pH and ionic strength on the adsorption performance were investigated. Meanwhile, the adsorption capacities of zeolite were discussed. The results showed that the amount of saturated adsorption of PAFC...
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