53 research outputs found
Process simulation and optimal design of membrane separation system for CO2 capture from natural gas
Chemical characterization of cloud episodes at a ridge site in Tuscan Appennines, Italy
Cloudwater samples were collected from November 1992 to March 1995 in Vallombrosa, a mountain site of the Tuscan Apennines (central Italy). Chemical analyses show that all examined inorganic ions contributed significantly to the total ionic content (TIC). The ratio SO4/NO4 ranged from 0.92 to 3.46 and was > 1 for 86% of samples. There is a wide range in the chemical composition of the cloudwater. The total ionic content ranged from 640 to 7476 Aeq l 1 and pH from 3.17 to 6.22. The liquid water content (LWC) ranged from 0.06 to 0.94 g m 3 and electrical conductivity from 47 to 485 AV 1. The total ionic content decreases while the liquid water content increases. Also analyzed were soluble trace metals (Fe, Pb, Cu, Mn, Cd, Al), synthetic anionic surfactants and the methanesulphonic acid. Chemical analyses evidenced in some cases a high concentration of organic matter. The meteorological analysis for a few samples of individual passages was carried out for the possibility of establishing a correspondence between meteorological events and chemical composition. The sources (marine, crustal and anthropogenic) of chemical components were deduced
Diversity and changes in the horizontal distribution of crustaceans and rotifers in an episodic wetland of the central region of Argentina
Second-harmonic conical refraction:observation of free and forced harmonic waves
Observation of second-harmonic conical refraction in KTiOPO4 crystal is reported. Two second-harmonic conical patterns, namely forced and free harmonic waves, are identified and registered with exceptional clarity and level of details. The forced second-harmonic wave evolves into the characteristic ring intensity distribution while the free-harmonic wave gives a single ray direction, resulting in a spot
The dependence of the nanostructure of magnetron sputtered Cu–Ag alloy films on composition and temperature
Removal of CO2 from Natural Gas Using Membrane Separation System: Modeling and Process Design
Is Elicitation of the Autonomic Orienting Response Associated With Allocation of Processing Resources?
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