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...

CMK-8, a mesoporous carbon material, was activated using different methods for the adsorption of low-concentration airborne formaldehyde. KOH and ammonia treatments were used to activate CMK-8. A CMK-8 sample was treated with KOH first followed by an ammonia-treatment at 700 degrees C to determine the effect of a combination of the two treatment methods. The adsorbents prepared were characteriz...

The ice nucleation characteristics of montmorillonite mineral dust aerosols with and without exposure to ammonia gas were measured at different atmospheric temperatures and relative humidities with a continuous flow diffusion chamber. The montmorillonite particles were exposed to pure (100%) and diluted ammonia gas (25 ppm) at room temperature in a stainless steel chamber. There was no signific...

Methods: Ammonia concentrations in farrowing, nursery, finisher, and gestating barns were monitored for 8 weeks using both the pHydrionTM test strips and the DraegerTM unit. The ammonia measurements were compared using bivariate correlation analysis. Average ammonia concentrations in each barn type were compared using an ANOVA. The precision and costeffectiveness of each assay were demonstrated...

In 2004,ammonia concentration in raw water of Sitalakhya River at the eastern periphery of Dhaka was found higher than the expected rate of 4 mg/Lforecasted in feasibility studies,with a value of about 8 mg/L, which could not be removed by conventional treatment chain employed at Dhaka, hence, recentlyan ammonia removal plant has been constructed. This important background has ledto the current...

The model rumen Firmicutes organism Ruminococcus albus 8 was grown using ammonia, urea, or peptides as the sole nitrogen source; growth was not observed with amino acids as the sole nitrogen source. Growth of R. albus 8 on ammonia and urea showed the same growth rate (0.08 h(-1)) and similar maximum cell densities (for ammonia, the optical density at 600 nm [OD600] was 1.01; and for urea, the O...

Most investigators who have studied ammonia metabolism in liver disease have measured the concentration of ammoniat in whole blood.1'° Only a few authors have used the plasma ammonia concentration.ll" Recently, several cation exchange techniques have been developed that measure the ammonia concentration of plasma.1" There are several theoretical advantages to the use of plasma which compensate ...

A simple,rapidmethod was developed foraccurate determinationof ammonia inwhole blood.Blood proteins were precipitated with perchioric acid (8 g/dl) and the free ammonia liberatedinthe supernateon alkalinization was measured directlywithan ammonia-specific electrode after adjusting the sample temperature to 25 #{176}C. Some variablesaffectingprecision,accuracy, and electrodeperformance were stud...

The transport of ammonia/ammonium is fundamental to nitrogen metabolism in all forms of life. So far, no clear picture has emerged as to whether a protein channel is capable of transporting exclusively neutral NH(3) while excluding H(+) and NH(4)(+). Our research is the first stoichiometric study to show the selective transport of NH(3) by a membrane channel. The purified water channel protein ...