Measurements of HNO3 and N2O5 using Ion drift – Chemical Ionization Mass Spectrometry during the MCMA – 2006 Campaign J. Zheng, R. Zhang, E. C. Fortner, L. Molina, A. C. Aiken, J. L. Jimenez, K. Gäggeler, J. Dommen, S. Dusanter, P. S .Stevens, and X. Tie Dept. Atmospheric Sciences, Texas A & M University, College Station, Texas 77843, TX, USA Molina Center for Energy and the Environment, La Jol...

Complexation between hexavalent neptunium and nitrate was studied in aqueous nitric acid solution using optical absorption, vibrational and X-ray absorption spectroscopies. Distributions of aqueous [NpO2](2+), [NpO2(NO3)](+) and [NpO2(NO3)2] species were obtained as a function of nitric acid concentration between 0 and 14 M. The crystal structure of [NpO2(NO3)2(H2O)2]·H2O was determined.

It is little more than jifty years since the Jirst manufacture of nitric acid by the oxidation of ammonia over a platinum catalyst. Ostwald’s original industrial plant had an output of some 100 tons of acid a year; today the world capacity for nitric acid manufacture by this process is about ten million tons a year. This article traces the beginnings and early developments of the process until ...

Airway nitric oxide production is decreased in cystic fibrosis. As growth hormone therapy has been shown to increase nitric oxide production in growth hormone-deficient patients, it may also affect nitric oxide production in patients with cystic fibrosis. The objective of the present study was to investigate the effect of growth hormone therapy on systemic and airway nitric oxide formation in p...

The study aimed to determine the influence of nitric oxide (NO) on the action of histamine and carbachol on acid secretion in the common African toad - Bufo regularis. Gastric acidity was determined by titration method. The acid secretion was determined when nitric oxide was absent following administration of NO synthase inhibitor; N-nitro-L-arginine methyl ester (L-NAME) and when nitric oxide ...

Multi-Walled Carbon Nanotubes (MWCNTs) surfaces were serially modified by the annealing treatment under Helium flow at 1000oC, the nitric acid treatment and again the annealing treatment under same conditions and their maximum adsorption capacities for benzene and toluene were measured and analyzed. The unmodified and modified MWCNTs werecharacterized by Fourier Tr...

Abstract According to the characteristics of stainless steel material and scale composition condenser in a power plant, nitric acid was used as cleaning medium, corrosion inhibitor added inhibit on steel. On line chemical carried out without shutdown. The removal efficiency rate met requirements DL/T957-2017, terminal difference recovered optimal value after cleaning.

The aim of the present work is to study processes oxidative destruction waste vulcanizates (flakes) with nitric acid. composition particles main reaction product was determined (oxidized vulcanized). IR spectra hexane and acetone extracts oxidized are also presented. It found that rubber component undergoes deep structural changes leading formation products characterized by chemical heterogeneity

       This study was designed to explore the protective effects of ascorbic acid and water extract of Spirulina platensis (blue green algae) on methotrexate-induced lipid peroxidation using goat liver as the lipid source. This in vitro evaluation was done by measuring the malondialdehyde, 4-hydroxy-2-nonenal, reduced glutathione and nitric oxide content of tissue homogenates....