The hypothesis that life originated by a process of slow chemical evolution has been the basis of many attempts to synthesize biochemical molecules under simulated primitive earth conditions. Since the primitive atmosphere is believed to have been strongly reducing, consisting essentially of the hydrides of hydrogen, carbon, nitrogen, and oxygen,'-3 experiments have been directed toward the syn...

A procedure for the quantitative and qualitative analysis of cyanide (HCN) in biological material using gas chromatography with thermoionic detection (NPD) and the headspace technique was proposed. The distribution of cyanides in individual organs was established in a group of experimental animals (Wistar strain rats, sacrificed due to termination of reproduction). The suitability of the techni...

Positioning the catalysts in front of turbocharger has gained interest over recent years due to earlier onset temperature and positive effect elevated pressure. However, several challenges must be overcome, like presence higher pollutant concentrations absence or insufficient diesel oxidation catalyst volume at this location. In context, our study reports a systematic investigation on pressure ...

A simple equation is developed between the total cyanide contents of cassava root parenchyma and the processed product with the % retention of cyanide on processing. This equation is applied to different methods of processing used worldwide. Thus to produce cassava flour of 10mg HCN equivalents/kg flour (ppm), the WHO safe level, by sun drying or heap fermentation requires starting with sweet c...

Cyanide (CN) is considered to be a terrorist chemical weapon due to its ready availability in multi-kilogram quantities and multi-modal means of intoxication. The body uses the sulfur transferase enzyme rhodanese to detoxify cyanide via conversion of cyanide to thiocyanate. This paper explores the potential energy surfaces for the conversion of cyanide anion and hydrogen cyanide to thiocyanate ...

The emissions of NOx (defined as NO (nitric oxide) + NO2 (nitrogen dioxide)) and hydrogen cyanide (HCN), per unit amount of fuel burned, from fires in the pine forests that dominate the mountains surrounding Mexico City (MC) are about 2 times higher than normally observed for forest burning. The ammonia (NH3) emissions are about average for forest burning. The upper limit for the mass ratio of ...

Cyanide is a valuable tool for studying respiratory mechanisms and their rôle in embryonic development: it is relatively specific in its action, penetrates cell membranes readily, is active in low concentration, and may be controlled quantitatively (page 217). Echinarachnius is extremely sensitive to cyanide and the oxygen consumption of both eggs and of sperm is almost completely inhibited by ...

Effect of subcutaneously (s.c.) administered potassium cyanide (0.5 and 1.0 LD50) and inhalation of hydrogen cyanide (55 ppm or 60.6 mg/m3) for 30 minutes was studied on various physiological parameters related to dynamic pulmonary mechanics in anaesthetized rats. Total pulmonary phospholipid with its fractions were also estimated. Both s.c. (1.0 LD50) and inhalation exposures increased air flo...

In this work, the recycling of nitrogen and hydrogen from nitrogen-rich (N-rich) biological residues via autothermal gasification has been proposed as a process suitable for sustainable production ammonia (NH3). Two N-rich residues, sewage sludge meat bone meal, were used analyzed in work glutamic acid was selected model compound protein-fuel-N these residues. Glutamic experiments carried out o...