The effects of different concentrations of CdCl2 and AlCl3 on NH4+ and NO2? oxidation in an aqueous system were investigated. AlCl3 had no effect on NH4+ removal and its oxidation to NO2?, whereas NO2? disappearance was greatly enhanced by AlCl3. In contrast, CdCl2 delayed removal of NH4+ and its subsequent oxidation to NO2? and also decreased the rate of NO2? disappearance. When compared to th...

The molecular characteristics and formation mechanism of biogenic secondary organic aerosols (BSOAs) in the forested atmosphere are poorly known. Here, we report temporal variations processes BSOA tracers derived from isoprene, monoterpenes, β caryophyllene PM2.5 samples collected at foot Mt. Huang (483 m a. s. l) East China during summer 2019 with a 3 h time resolution. concentrations nearly a...

The study was conducted to spatiotemporally analyze the quality, location and critical water variables influencing quality using monitoring data from Department of Environment Natural Resources, Dong Thap province in 2019. parameters including turbidity, pH, temperature, dissolved oxygen (DO), total suspended solids (TSS), biological demand (BOD), chemical (COD), nitrite (N-NO2?), nitrate (N-NO...

Abstract. We developed a top-down methodology combining the inversed chemistry transport modeling and satellite-derived tropospheric vertical column of NO2 estimated NOx emissions Yangtze River Delta (YRD) region at horizontal resolution 9 km for January, April, July, October 2016. The effect emission estimation on air quality response ambient ozone (O3) inorganic aerosols (SO42-, NO3-, NH4+, S...

From extraction experiments and gamma-activity measurements, the extraction constan corresponding to the equilibrium NH4(+)(aq) + 1*Na(+)(nb) <=> 1*NH4(+)(nb) + Na(+)(aq) taking place in the two-phase water - nitrobenzene system (1 = dibenzo-18-crown-6, aq = aqueous phase, nb = nitrobenzene phase) was evaluated as log K(ex) (NH4(+),1*Na(+)) = -0.1 +/- 0.1. Further, the stability constant of the...

NH4 uptake capacity of loblolly pine (Pinus taeda L.) and ponderosa pine (Pinus ponderosa Douglas. Ex Laws.) seedlings that were grown in pots in a phytotron at CO2 partial pressures of 35 or 70 Pa with NH4 + as the sole N source. Kinetics of N-labeled NH4 + uptake were determined in excised roots, whereas total NH4 + uptake and uptake rates were determined in intact root systems following a 48...

This paper reports a case of squamous cell carcinoma of middle ear that appeared after lacrimal sac malignant with an unusual clinical course. Correspondence to: Dr. Hongqun Jiang, Department of OtolaryngologyHead and Neck Surgery, The First Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi, P. R. China; Tel: 0086-13870950313; Fax: +86-7918869-2519; E-mail: [email protected]

Ambient aerosol samples were collected over the tropical northern Atlantic Ocean during the month of April 1996 onboard the R/V Seward Johnson. Dichotomous high-volume collector samples were analyzed for ferrous iron immediately after collection, while trace metals, anions, and cations were determined upon return to the laboratory. Data are analyzed with the aid of enrichment factor, principal ...