In the study, a train of thoughts was put forward with the purpose of achieving the N_2O production decrement control by using DNA probe and PCR technology for quantitative analysis on nitrous oxide reductase in biological denitrification.

Nitrous oxide in atmosphere has been increasing continuously due to human activity and it will influence the environment severely, so study on the emission of nitrous oxide is more and more important.

Flux of nitrous oxide and methane were measured in the lower reaches of Liaohe Plain by using static chamber-gas chromatographic techniques in thawing period.

Emissions of NO,N_2O and SO_2 during coal combustion in a 30kW scale circulating fluidized bed(CFB) combustor were experimentally investigated.

N_2O is the most important trace gas, that greatly influences atmosphere chemistry and greenhouse effect.

The application of nitrous oxide-ethane flame atomic absorption spectrometry method to measure tin in the high temperature nickel base superalloy was studied.

The application of nitrous oxide-ethane flame atomic absorption spectrometry to measure Tin in Wrought titanium alloy is stueide.

The nitrous oxide-ethane flame atomic absorbing spectral method to measure the content of Titanium in stainless steel is studied .

In order to reduce nitrous oxide(N_2O) production from real wastewater and optimize the DO concentration and the aeration mode,nitrification efficiency and N_2O production from nitrification treating domestic wastewater under difference DO concentrations were investigated using lab-scale SBR.