Cobalt molybdenum nitrides are one of the most promising ammonia-synthesis catalysts future. However, selection optimal promoter composition is a challenging task. In this paper, structure–property relationship ternary cobalt as ammonia synthesis promoted with potassium was studied. A series containing 0.2–3.5 wt% analyzed by means X-ray diffraction, volumetric gas adsorption, and activity test...

in many hydroelectric dams, when the inflows are greater than the demand for energy, a portion of the water that could be used to generate electricity is diverted to the spillway and literally wasted. this energy,designated as “spilled turbinable energy”, could be used advantageously to generate other products or an energy vector that could be stored for later use, since in these situations the...

The objective was to determine whether ruminant gut tissues have the capability to synthesize urea in a short-term incubation. Mixed primary cell cultures containing ruminal epithelial (REC) or duodenal mucosal cells (DMC) were isolated from growing sheep (n = 4) fed a mixed forage-concentrate diet. Cells were incubated (90 min) in a Krebs salts-based buffer with either acetate (5 mM) or propio...

It has been proposed that key enzymes of ureagenesis and the alanine aminotransferase activity predominate in periportal hepatocytes. However, ureagenesis from alanine, when measured in the perfused liver, did not show periportal predominance and even the release of the direct products of alanine transformation, lactate and pyruvate, was higher in perivenous cells. An alternative way of analyzi...

Epidermal growth factor (EGF) causes proliferation in renal tubular cells but, when it is combined with transforming growth factor-beta1, it causes hypertrophy by a mechanism that requires the activity of the retinoblastoma family of proteins. In contrast, ammonia causes hypertrophy by decreasing lysosomal proteolysis; in some cell types, it also decreases cellular proliferation. These studies ...

Portal systemic encephalopathy (PSE) comprises of five major features, of which ammonia intoxication of the central nervous system is the only specific feature. Ammonia is a key intermediate in the metabolism of nitrogen. Oxidative deamination of aminoacids is one of the major ammonia producing pathways. It occurs predominantly in the liver, to a lesser extent kidneys and also in the brain. The...

Ammonia may be one of the energy carriers in hydrogen economy. Although research has mostly focused on electrochemical ammonia synthesis, this however remains a scientific challenge. In current article, we discuss feasibility single-pass thermochemical synthesis as an alternative to high-temperature, high-pressure Haber-Bosch loop. We provide overview recently developed low temperature catalyst...

Intensive efforts have been devoted to the development of new materials for safe and efficient hydrogen storage. Among them, ammonia-borane appears to be a promising candidate due to its high gravimetric hydrogen storage capacity. Ammonia-borane can release hydrogen on hydrolysis in aqueous solution under mild conditions in the presence of a suitable catalyst. Herein, we report the synthesis of...

In this paper, we report the status of our investigation into the feasibility of introducing a chemical agent into agricultural grade anhydrous ammonia that will render the ammonia useless for methamphetamine synthesis. Our goal is to provide a means to reduce the number, ease, and stealth that clandestine methamphetamine laboratories using the dissolving metal, or Nazi, synthetic method curren...