868 resultados para binary soliton


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Mode of access: Internet.

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"Supported in part...under Grant No. US NSF GJ812 and Grant No. US NSF GJ813."

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Bibliography: p. 26.

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"UILU-ENG 84 1703"--Cover.

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"Supported by Contract AT (11-1)-1018 with the U.S. Atomic Engery Commission."

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Thesis (M.S.)--University of Illinois at Urbana-Champaign.

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Includes bibliographical references (leaves 132-134).

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Includes bibliographical references.

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"Materials Laboratory, Contract No. AF33(616)-5771, Project No. 7021."

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"Prepared under the sponsorship of Rome Air Development Center, Air Research and Development Command, United States Air Force, Griffiss Air Force Base, New York, Advanced Development Laboratory. Contract no. AF 30 (602)-1702, project no. 4519, task no. 45232."

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"Materials Central, Contract no. 33(616)-5995. Project no. 7351.

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Adsorption of p-cresol, nitrobenzene and p-nitrophenol on treated and untreated carbons is investigated systematically. The effects of carbon surface chemistry and solution pH are studied and discussed. All adsorption experiments were carried out in pH-controlled solutions to examine the adsorption properties of the adsorption systems where the solutes are in molecular as well as ionic forms. Using the homogeneous Langmuir equation, the single solute parameters are determined. These parameters are then used to predict the binary solute adsorption isotherms and gain further insights into the adsorption process. (C) 2002 Elsevier Science Ltd. All rights reserved.

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High-quality nanometer thick ultramicroporous membranes were prepared from silica sol-gel processes and tested for the permeation of binary gas mixtures of He, H-2, CO2, and CH4 across different temperature and partial pressure regimens. Pore size distribution by molecular probing showed that the majority of pore sizes had dimensions below 2.9 Angstrom. In 50:50 binary mixtures, the fluxes of gases increased as a function of temperature, indicating an activated transport mechanism. The ultramicroporous membranes showed high selectivities at 150 degreesC for He/CO2 (30), He/CH4 (93), H-2/CO2 (10), and H-2/CH4 (9) with lower selectivities for CO2/CH4 (5). High activation energies (E-a) were observed for the permeance of 50:50 binary mixtures containing He and H-2 of 22.1-27.5 and 17.6-23.1 kJ.mol(-1), respectively. The E-a for the permeance of the total mixture approached the E-a for the permeance of the molecule with the smaller kinetic diameter (He or H-2).