A review of the recent progress in biotrickling filters: packing materials, gases, micro-organisms, and CFD.

Organic pollutants in the air have serious consequences on both human health and the environment. Among the various methods for removing organic pollution gas, biotrickling filters (BTFs) are becoming more and more popular due to their cost-effective advantages. BTF can effectively degrade organic pollutants without producing secondary pollutants.

[Innovation of key technologies in fermentative production of L-glutamate and industrial application].

The fermentative production of L-glutamate is by far the largest among the amino acids commercially produced. L-glutamate is also the largest fermentation product in China in terms of the production scale. With the rapid development in synthetic biotechnology, production equipment and process technologies, the performance of industrial strains and the production technology of L-glutamate have been advanced remarkably in recent years.

Novel two-tone measurement of the nonlinearity and memory effects of mixers in different amplitude regions of large carrier signals.

The conventional two-tone test method cannot measure the amplitude and phase of IM3 products under different operating conditions. The nonlinearity and memory effects of mixers under different operating conditions have not been characterized in existing research. This paper presents a new two-tone measurement method for characterizing the nonlinearity and memory effects of mixers under the excitation of large carrier signals of different amplitudes.