Carbamyl phosphate synthetase (from Escherichia coli) consists of a 7.3S protomeric unit that contains one heavy polypeptide chain (molecular weight about 130,000) and one light chain (molecular weight about 42,000). The heavy and light chains were separated by gel filtration in the presence of 1 M potassium thiocyanate. In contrast to the native enzyme and the reconstituted enzyme (prepared by...

Tannins in forages complex with protein and reduce the availability of nitrogen to ruminants. Ruminal bacteria that ferment protein or peptides in the presence of tannins may benefit digestion of these diets. Bacteria from the rumina of sheep and goats fed Calliandra calothyrsus (3.6% N and 6% condensed tannin) were isolated on proteinaceous agar medium overlaid with either condensed (calliandr...

Brazil is the largest broiler meat exporter in world. This important economic activity generates income different branches of production chain. However, decomposition residues incorporated poultry litter several gases, among them ammonia. When emitted from to air, ammonia can cause damages animals and man, addition being able convert into a greenhouse gas. Thus, aim this article was carry out r...

backgrounds and aims: ammonia removal from air to prevent severe damage to the environment and living organisms is very important. biofiltration is an efficient, easy, cost-effective, and environmentally friendly process for degradation of ammonia from waste air. the aim of this study is to investigate the efficiency of biological filtration using a compost and scallop bed for ammonia removal. ...

The application of partial nitritation and anammox processes (PN/A) to remove nitrogen can improve the energy efficiency wastewater treatment plants (WWTPs) as well diminish their operational costs. However, there are still several limitations that preventing widespread PN/A in urban WWTPs such as: (a) loss performance stability units operated at sludge line, when is thermally pretreated increa...

This study develops system-level models of ammonia-fuelled powertrains that reflect the characteristics four oceangoing vessels to evaluate efficacy ammonia as an alternative fuel in marine environment. Relying on thermodynamics, heat transfer, and chemical engineering, adequately capture behaviour internal combustion engines, gas turbines, processing equipment, exhaust aftertreatment component...

Agrotechnical assessment of struvite produced by a lab-scale sedimentation unit is performed. As source phosphates and ammonia, liquor obtained through dewatering ?unicipal wastewater treatment plant sludge was in use. The range ammonia the 130 - 250 380 560 mg/L, respectively. Seawater brine with magnesium concentration around 60 g Mg2+/L applied as magnesium. agrotechnical characteristics wer...

natural gas is often associated with nitrogen and heavy compounds. the heavy components in the natural gas not only can feed downstream units, owing to the low temperature process may be formed solid as well. therefore, heavy components separation can be a necessity and produce useful products. virtually, all natural gases are containing nitrogen ​​that would lower the heating value of natural ...