A numerical model was used to investigate the effect of acetylene concentration in feed gas on molecular growth and solid particle nucleation argon-acetylene CCRF discharges. Results showed that for large conversion yields small concentrations discharge, ionization kinetic is driven by Penning process governed neutral polyynes. The cluster size distribution predicted shows unlikely this situati...

The production of nitrogenase enzyme and auxins by free living diazotrophs has the potential to influence the growth of host plants. In this study, diazotrophs were grown in the presence of various concentrations of nitogen (N) to determine the optimal concentration of N for microbial growth stimulation, promotion of gaseous N (N2) fixation, and phytohormone production. Therefore, we investigat...

Extracts of Closfridium pasfeurianum have been separated into five protein fractions, which are necessary for nitrogen fixation when pyruvate is used as the source of energy and electrons. Pyruvate oxidase is shown to be heat-stable and to have gel filtration properties corresponding to a molecular weight of 100,000 or greater. The function of ferredoxin as an electron carrier for nitrogen fixa...

The tungsten iron-sulfur enzyme acetylene hydratase catalyzes the conversion of acetylene to acetaldehyde by addition of one water molecule to the C-C triple bond. For a member of the dimethylsulfoxide (DMSO) reductase family this is a rather unique reaction, since it does not involve a net electron transfer. The acetylene hydratase from the strictly anaerobic bacterium Pelobacter acetylenicus ...

The mass specific extinction coefficient, rs, of smoke produced from acetylene and ethene fuel burned under laminar and turbulent conditions was measured using the Large Agglomerate Optics Facility. Key design features that enable a threefold reduction in the uncertainty compared with previous measurements include a 10-times longer pathlength, less than 0.05% drift in the light intensity ratio,...

We have analysed the ISO-SWS spectrum of Jupiter in the 12–16 μm range, where several hydrocarbons exhibit rovibrational bands. Using temperature information from the methane and hydrogen emissions, we derive the mixing ratios (q) of acetylene and ethane at two independent pressure levels. For acetylene, we find q = (8.9 −0.6)× 10 −7 at 0.3 mbar and q = (1.1 −0.1)× 10 −7 at 4 mbar, giving a slo...

Extracts of Closfridium pasfeurianum have been separated into five protein fractions, which are necessary for nitrogen fixation when pyruvate is used as the source of energy and electrons. Pyruvate oxidase is shown to be heat-stable and to have gel filtration properties corresponding to a molecular weight of 100,000 or greater. The function of ferredoxin as an electron carrier for nitrogen fixa...

Physiological and biochemical markers of metabolic competence were assayed in bacteroids isolated from root nodules of control, dark-stressed, and recovered plants of Glycine max Merr. cv ;Woodworth.' Nitrogenase-dependent acetylene reduction by the whole plant decreased to 8% of control rates after 4 days of dark stress and could not be detected in plants dark stressed for 8 days. However, in ...

Energy transfer via bath gas collisions is an important factor in controlling the kinetics of many combustion reactions. Previous work [1, 2] demonstrated the feasibility and accuracy of trajectory calculations for predicting energy transfer parameters for use in the master equation calculations of pressure dependent rate coefficients. Here we use these methods to study collisions between acety...