application of cogeneration systems based gas turbine for heat and power production is increasing. because of finite natural energy resources and increasing energy demand the cost effective design of energy systems is essential. cgam problem as a cogeneration system is considered here for analyzing. two new approaches are considered, first in thermodynamic model of gas turbine and cogeneration ...

ON T H E HUSTINGS—Three Rice students prepare a mailing fo r the Professors fo r Johnson-Humphrey-Yarborough (see p. 6). Elsewhere, a national group, "Scientists and Engineers fo r Johnson-Humphrey" will fo rm a local chapter this Monday a t 8 pm a t the Houston Theatre Center. Rice president K. S. Pitzer, TSU President Nabr i t and hear t surgeon Michael DeBakey were among the founders of the ...

The Mars Global Surveyor, Mars Exploration Rover, and Mars Express missions have stimulated considerable thinking about the surficial geochemical evolution of Mars. Among the major recent mission findings are the presence of jarosite (a ferric sulfate salt), which requires formation from an acid-sulfate brine, and the occurrence of hematite and goethite on Mars. Recent ferric iron models have l...

Major uncertainties exist with respect to the aqueous geochemical evolution of the Martian surface. Considering the prevailing cryogenic climates and the abundance of salts and iron minerals on Mars, any attempt at comprehensive modeling of Martian aqueous chemistry should include iron chemistry and be valid at low temperatures and high solution concentrations. The objectives of this paper were...

Janis L. Dickinson,a Çağlar Akçay,b Elise Ferree,c and Caitlin Sternd aCornell Lab of Ornithology, 159 Sapsucker Woods Road, Ithaca, NY 14850, USA, bDepartment of Biological Sciences, Virginia Tech, Derring Hall, 1405 Perry Street, Blacksburg, VA 24061, USA, cKeck Science Department, Claremont-McKenna, Scripps and Pitzer Colleges, Keck Science Center, 925 North MMills Avenue, Claremont, CA 9171...

In this work, the results concerning to the mean activity coefficient measurements for NaCl in the (glycerol + water) system using the potentiometric method are reported. The potentiometric measurements were performed on the galvanic cells without liquid junction of the type: Ag|AgCl|NaCl (m), glycerol (wt%), H2O (1 - wt)%|Na-ISE, in various mixed solvent systems containing 0, 5, 10,...

abstractin this work, the micro powder was the product of cedar leaf (mpcl) is used as a low-cost adsorbent for the removal of pb2+ ions from aqueous solutions. bath experiments were used to determine the best adsorption conditions the adsorption percentage of pb2+ ions mpcl samples at different initial ph, contact time (tc), adsorbent dosage and temperature (t) were investigated. effective rem...

Surfactant-dye interactions are very important in chemical and dyeing processes. The dyes interact strongly with surfactant and show new spectrophotometric properties, so the UV-vis absorption spectrophotometric method has been used to study this process and extract some thermodynamic parameters. In this work, the association equilibrium between ionic dyes and ionic surfactant were studied by a...