The purposes of this study were to prove that ammonia can be present in biogas from anaerobic digestion and to control this ammonia by reducing the reactor pH. Ammonia containing biogas was produced for a period of more than 100 days, with a maximum of 332 ppm. Especially during periods of high free ammonia concentrations in the reactor was ammonia present in biogas. The free ammonia was effect...

*Correspondence: Shanwen Tao, Department of Chemical & Process Engineering, University of Strathclyde, Glasgow G1 1XJ, UK e-mail: [email protected] Ammonia, an important basic chemical, is produced at a scale of 150 million tons per year. Half of hydrogen produced in chemical industry is used for ammonia production. Ammonia containing 17.5 wt% hydrogen is an ideal carbon-free fuel for fu...

Monodispersed tetragonal barium titanate (BaTiO3) nanopowders were synthesized by a convenient hydrothermal route at low temperature of 200?C in only 24 h. The key point this method is to promote the generation ultrafine titanium hydroxide precipitation precursors with help absolute ethyl alcohol and ammonia solution during hydrolysis Ti(OC4H9)4. results X-ray diffraction Raman spectra show tha...

Inflow of preformed ammonia in arterial blood, renal production of ammonia, outflow of ammonia in renal venous blood, and urinary excretion of ammonia were measured during the infusion of (15)NH(4)Cl into one renal artery of dogs with chronic metabolic acidosis. Our results show that the specific activity of ammonia measured in the urine and that calculated in the renal pool agree within 95%. P...

The article presents the results of a study processes obtaining magnesium oxide by fusing serpentinites Arvaten deposit in presence ammonium sulfate, followed grinding and treatment with water to separate silica from suspension, neutralizing filtrate ammonia pH 8.5 for precipitation separation impurity metal ions, ions solution using carbonate, thermal decomposition corbanate obtain oxide. It h...

Resurgence of interest in ammonia metabolism in liver disease has resulted in extensive use of the blood ammonia determination as a clinical and investigative tool. Almost all methods for the determination of ammonia in blood are based on the liberation of ammonia by alkalinization, diffusion of the ammonia into an acid medium, followed by titrimetric or colorimetric quantitation. Although wide...

This review will briefly summarize current knowledge on the basolateral ammonia transport mechanisms in the thick ascending limb (TAL) of the loop of Henle. This segment transports ammonia against a concentration gradient and is responsible for the accumulation of ammonia in the medullary interstitium, which, in turn, favors ammonia secretion across the collecting duct. Experimental data indica...

Glutamine synthetase (GS) catalyzes the recycling of NH4 (+) with glutamate to form glutamine. GS is highly expressed in the renal proximal tubule (PT), suggesting ammonia recycling via GS could decrease net ammoniagenesis and thereby limit ammonia available for net acid excretion. The purpose of the present study was to determine the role of PT GS in ammonia metabolism under basal conditions a...

We report laboratory experiments and modeling calculations investigating the effect of a hydrocarbon coating on ammonia ice spectral signatures. Observational evidence and thermochemical models indicate an abundance of ammonia ice clouds in Jupiter’s atmosphere. However, spectrally identifiable ammonia ice clouds are found covering less than 1% of Jupiter’s atmosphere, notably in areas of stron...