odor emission is a common environmental problem in septic tank. the feasibility of using trickling filter to eliminate the malodorous gases from the septic tank was studied. a trickling filter is set up at the outlet of the waste gases of the septic tank, which was attached to the university's cafeteria. in this investigation, the trickling filter system was used, measuring the hydrogen sulfide...

rumen is a persistent and specific ecosystem consists of bacteria, protozoa and fungus where feed fermentation takes place in it. produced hydrogen in rumen can be used in the synthesis of the volatile fatty acids and the microbial protein and its excess would be eliminated through the production of methane by methanogenesis. nutritionists have tried to find ways to decrease loss and energy and...

The role of the gastrointestinal tract as a major source of blood ammonia has been extensively studied in animals and in patients with liver disease. Less information is available concerning the relative contribution to the blood ammonia by other organs, such as muscle, liver, brain and kidney, which are known to be concerned with ammonia metabolism (1). The renal release of ammonia into the sy...

The kidney consistently releases ammonia into the renal venous circulation of normal subjects and patients with compensated liver disease (1-4). Under conditions of normal acid-base balance, the quantity released usually approximates the amount of ammonia excreted into urine (3, 4). From determinations of arteriovenous ammonia differences across various organs, it has become apparent that the r...

Abstract Lightning has been directly observed or inferred on all giant planets, generally accepted to be occurring in their water clouds. However, much as Earth both cloud–cloud and cloud–ground lightning, this does not mean flashes occur a narrow altitude range: Jupiter, the Galileo spacecraft detected lightning apparently below cloud base, explicable due precipitation, Juno SRU small far abov...

Glutamine synthetase (GSase), the enzyme that catalyses the conversion of glutamate and ammonia to glutamine, is present at high levels in vertebrate brain tissue and is thought to protect the brain from elevated ammonia concentrations. We tested the hypothesis that high brain GSase activity is critical in preventing accumulation of brain ammonia and glutamate during ammonia loading in the ammo...

In this study, a newly developed nitrogen (N) and phosphorus (P) recovery process using membrane contactor termed NPHarvest was tested with different liquid waste streams in large-scale trials. Ammonia captured ammonium sulfate form hydrophobic membrane, while precipitated as sludge alkali precipitation coagulation processes. The were selected to cover the potential for included two mesophilic ...

Ammonia has been suggested as a carbon-free hydrogen source, but a convenient method for producing hydrogen from ammonia with rapid initiation has not been developed. Ideally, this method would require no external energy input. We demonstrate hydrogen production by exposing ammonia and O2 at room temperature to an acidic RuO2/γ-Al2O3 catalyst. Because adsorption of ammonia onto the catalyst is ...

Silver nanoparticles were synthesized in the presence of saccharides and ammonia (NH3) in the concentration range from 10-2 to 103 ppm to develop an optical sensor for NH3 in aqueous solutions. Ammonia affects the features of the nanoparticles obtained in a concentration-dependent manner as determined by UV-vis absorption analysis and TEM observations. Structural and morphological analysis prov...