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Sorption and chemical transformation of PAH`s on coal fly ash

Description: The major objective of this work was to characterize the interactions of coal fly ash with polycyclic aromatic hydrocarbons (PAHS) and their derivatives, and to attempt to understand the influence of the surface properties of coal ash (and other atmospheric particles) on the chemical transformations of polycyclic aromatic compounds. Our studies have concentrated on the photochemical behavior of PAHs sorbed form the vapor phase on coal fly ashes, and compositional subfractions obtained therefrom… more
Date: May 9, 1995
Creator: Mamantov, G. & Wehry, E. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effect of a fluorinated nickel surface on the decomposition of perfluorodiethoxymethane

Description: Perfluoropolyethers (PFPEs) are a commercial class of lubricants widely used in computer and aerospace industries. This is a study of the degradation of a perfluorinated ether in the presence of a metal fluoride. Perfluorodiethoxymethane (PFDEM) is a PFPE analog. Temperature programmed desorption shows no contribution of PFDEM toward nickel fluoride on an NiF{sub 2} surface obtained by CF{sub 3}I adsorption. Higher coverages of nickel fluoride do not show any evidence of NiF{sub 2} contribution… more
Date: November 9, 1995
Creator: Sreevidya, S.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
open access

Capacitive deionization of water: An innovative new process

Description: The capacitive deionization of water with a stack of carbon aerogel electrodes has been successfully demonstrated for the first time. Unlike ion exchange, one of the more conventional deionization processes, no chemicals were required for regeneration of the system. Electricity was used instead. Water with various anions and cations was pumped through the electrochemical cell. After polarization, ions were electrostatically removed from the water and held in the electric double layers formed at… more
Date: January 9, 1995
Creator: Farmer, J.; Fix, D. & Mack, G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Direct aromatization of methane. Quarterly technical progress report No. 12, July 1, 1995--September 30, 1995

Description: Further investigations of the initiation of pyrolysis by a solid surface using a variety of catalysts with different surface areas and compositions were carried out during this reporting period. The effects of catalyst surface area, reaction temperature, and presence of ethane have been addressed. In general, catalysts such as {alpha}-A1{sub 2}O{sub 3},SiC, or hexaaluminates were found able to lower the reaction temperature but led to increased {open_quotes}tar{close_quotes} formation. The addi… more
Date: November 9, 1995
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A neutron method for NDA analysis in the SAPPHIRE Project

Description: The implementation of Project SAPPHIRE, the top secret mission to the Republic of Kazakhstan to recover weapons grade nuclear materials, consisted of four major elements: (1) the re-packing of fissile material from Kazakh containers into suitable US containers; (2) nondestructive analyses (NDA) to quantify the U-235 content of each container for Nuclear Criticality Safety and compliance purposes; (3) the packaging of the fissile material containers into 6M/2R drums, which are internationally ap… more
Date: January 9, 1995
Creator: Lewis, K. D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

National Institute for Global Environmental Change. Final Report

Description: Over the past decade or so the evolution and equilibria of persistent decks of stratocumulus climatologically clinging to the edge of summertime subtropical highs has been an issue of increased scientific inquiry. The particular interest in the microphysical structure of these clouds stems from a variety of hypotheses which suggest that anthropogenic influences or biogenic feedbacks may alter the structure of these clouds in a manner which may be climatically significant. Most hypotheses regard… more
Date: March 9, 1995
Creator: Cotton, W.R.; Stevens, B.; Duda, D.; Richardson, W. & Feingold, G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Synthesis, characterization and physical properties of Al-Cu-Fe quasicrystalline plasma sprayed coatings

Description: Our lab has been working with plasma spraying of both high pressure gas atomized (HPGA) and cast and crushed quasicrystal powders. A major component of this research includes comparative studies of PAS coatings formed with starting powders prepared by both techniques. In addition, a thorough investigation of the effects of starting powder particle size on coating microstructure is included. During the course of the overall research, an interest developed in forming Al-Cu-Fe materials with finer… more
Date: November 9, 1995
Creator: Daniel, S.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
open access

Multi-Function Waste Tank Facility phase out basis. Revision 2

Description: Additional double-shell tank storage capacity is not needed until FY 2004 or later. The waste volume in the current baseline program can be managed within the existing tank capacity. However, this requires implementation of some risk management actions and significant investment in software and hardware to accomplish the actions necessary to maximize use of existing storage tank space.
Date: June 9, 1995
Creator: Awadalla, N. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Tank characterization report for Double-Shell Tank 241-SY-102

Description: This tank characterization report presents an overview of Double-Shell Tank 241-SY-102 (hereafter, Tank 241-SY-102) and its waste contents. It provides estimated concentrations and inventories for the waste components based on the latest sampling and analysis activities and background tank information. This report describes the results of three sampling events. The first core sample was taken in October 1988. The tank supernate and sludge were next core sampled in February and March of 1990 (Ti… more
Date: June 9, 1995
Creator: DiCenso, A.T.; Amato, L. C. & Winters, W. I.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Glow discharge optical emission of plutonium and plutonium waste

Description: The application of glow discharges to the analysis of nonconducting materials such as glasses and ceramics is of great interest due to the number of advantages afforded by their direct solids capabilities. These types of samples, by their chemical nature, pose difficulties in dissolution for their subsequent analysis by common spectroscopic instrumental methods such as inductively coupled plasma atomic emission (ICP-AES). The ability of the glow discharge to sputter-atomize and excite solid non… more
Date: November 9, 1995
Creator: Marcus, R. K. & Spencer, W. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Interim-status groundwater monitoring plan for the 216-B-63 trench

Description: This document outlines the groundwater monitoring plan, under RCRA regulations in 40 CFR 265 Subpart F and WAC173-300-400, for the 216-B-63 Trench. This interim status facility is being sampled under detection monitoring criteria and this plan provides current program conditions and requirements.
Date: February 9, 1995
Creator: Sweeney, M.D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The advantages of including professionals from different fields of study in the solution of today`s water-related problems

Description: This report presents the details of a meeting of the American Society of Civil Engineers pertaining to water resources and quality. This report suggests an interdisciplinary approach to solving today`s problems dealing with water resources.
Date: May 9, 1995
Creator: Renshaw, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Yb{sup 3+}:BaCaBO{sub 3}F: A potential new self-frequency-doubling laser material

Description: Yb:BaCaBO{sub 3}F (Yb:BCBF) has been investigated as a new laser crystal with potential for self-frequency-doubling. An YB:BCBF laser has been pumped at 912 mm, and a measured slope efficiency of 38% has been obtained for the fundamental laser output at 1034 nm. Single crystal powders of BCBF have been compared with K*P for a relative measure of the second harmonic generating potential, yielding d{sub eff}[BCBF]= (0-66)d{sub eff}[K*P]. The growth, spectroscopy, laser performance, and linear and… more
Date: March 9, 1995
Creator: Schaffers, K. I.; DeLoach, L. D.; Ebbers, C. A. & Payne, S. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Electrically conductive adhesive Flip Chip Attach Project. Annual report, October 1, 1994--October 1, 1995

Description: This annual report details activities for TRP Flip Chip Attached Project. The IBM/Universal Instruments team has completed the first year effort on the Electrically Conductive Adhesive Flip Chip Attach project. IBM-Yorktown has worked closely with IBM Endicott to develop a Polymer Metal Solvent Paste (PMSP) that can be processed to form a cylindrically shaped deposit. IBM Endicott has done extensive work on bonding. This work has identified the key parameters to bond a Polymer Metal Composite (… more
Date: November 9, 1995
Creator: Woychik, C.G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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