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High octane ethers from synthesis gas-derived alcohols

Description: Catalytic testing of inorganic catalysts was continued with the highly active sulfate-modified zirconia catalyst prepared here. Using isobutanol as the only reactant over this catalyst, it was demonstrated that high conversion and selectivity to isobutene was achieved at 175[degrees]C. In addition, the high selectivity to isobutene, i.e. 79--86 mol%, was maintained at higher space velocities and higher temperatures. A high productivity of 11.35 mol isobutene was achieved at 225[degrees]C. Utili… more
Date: October 1, 1992
Creator: Klier, Kamil; Herman, Richard G.; Feeley, Owen C. & Johansson, Marie A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The interactions of water and perfluorodiethyl ether on Ru(100)

Description: We have studied the interactions of water and perfluorodiethyl ether on Ru(100) in order to model the effects of surface structure and humidity on the bonding and decomposition of perfluoroalkyl ether lubricants with metal surfaces. In order to understand the interactions on Ru(100), we have first investigated the interactions of each of these adsorbates alone on the clean surface. The interactions of water with Ru(100) have been studied using both thermal desorption spectroscopy (TDS) and elec… more
Date: September 21, 1990
Creator: Leavitt, Pam
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
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Weathering characteristics of potential solar reflector materials: a survey of the literature

Description: A review of the available literature on the weatherability/durability of materials with possible applications in solar reflectors is summarized. A number of techniques used to weather solar materials are reviewed. These include both natural and simulated weathering. Little correlation has been shown to exist between natural and accelerated weathering, and much work needs to be done before results of accelerated aging tests can be used with confidence to predict material lifetimes under outdoors… more
Date: September 1, 1978
Creator: Hampton, H. L. & Lind, M. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The insulation irradiation test program for the Compact Ignition Tokamak

Description: The electrical insulation for the toroidal field coils of the Compact Ignition Tokamak (CIT) is expected to be exposed to radiation doses on the order of 10{sup 10} rad with {approx}90% of the dose from neutrons. The coils are cooled to liquid nitrogen temperature and then heated during the pulse to a peak temperature >300 K. In a program to evaluate the effects of radiation exposure on the insulators, three types of boron-free insulation were irradiated at room temperature in the Advanced Tech… more
Date: January 1, 1990
Creator: McManamy, T.J. (Oak Ridge National Lab., TN (USA)); Kanemoto, G. (EG and G Idaho, Inc., Idaho Falls, ID (USA)) & Snook, P. (Princeton Univ., NJ (USA))
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A drift-tube linac incorporating a ramped accelerating field

Description: A short, high-power linac structure has been designed and is being built; it incorporates a ramped accelerating field for matching a radio-frequency quadrupole (RFQ) to a high-gradient drift-tube linac (DTL). The tank is made of aluminum and can operate at high duty factor. The drift tubes are copper and use new neodymium-iron-boron quadrupoles. The linac is tuned using conical-sweep post couplers and is driven by multiple rf loops. Rapid acceleration of the beam occurs from low to high gradien… more
Date: January 1, 1987
Creator: Liska, D.J. & Dauelsberg, L.B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Genes and gene expression: Localization, damage and control -- A multi-level and interdisciplinary study

Description: This progress report describes gains made in three projects entitled (1) 3-Dimensional nuclear topography of genes and chromosomes in interphase nuclei, (2) Sequence specific identification and perturbation of the genomic DNA in living cells by nonionic oligonucleotide analogs (Matagen), and Resolution and isolation of specific DNA restriction fragments.(DT)
Date: August 1, 1992
Creator: Ts'o, P.O.P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effects of butylated hydroxyanisole on the metabolism and mutagenic and transformation potentials of benzo(a)-pyrene in cultured mammalian cells

Description: The mechanism by which butylated hydroxyanisole (BHA) inhibits benzo(a)pyrene (BaP)-induced neoplasia in vivo and mutagenicity in vitro has been the subject of a number of investigations. In this study the effect of BHA on BaP metabolism in Syrian hamster embryonic (SHE) cells was studied. In addition, a SHE cell-mediated Chinese hamster ovary (CHO) cell mutagenesis and a SHE cell transformation assay have been used to study the biological effects of BHA. The results indicate that BHA reduces t… more
Date: January 1, 1982
Creator: Chen, D.J.; Okinaka, R.T. & Strniste, G.F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A Technique for Epoxy Free Winding and Assembly of COS θ Coils for Accelerator Magnets

Description: Traditional methods of magnet construction (wet winding) use molded coil subassemblies bonded together with epoxy impregnated fiberglass tape. This is a highly labor intensive process involving redundant operations for each of the four coils. The epoxy free winding technique (dry winding) eliminates the epoxy curing steps and also allows all four coils to be wound on 3 common winding mandrel, thereby reducing winding stations and handling. The tooling required for dry winding is a radical depar… more
Date: September 30, 1986
Creator: Carson, J. A. & Bossert, R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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High resolution photoelectron spectroscopy and femtosecond intramolecular dynamics using supersonic molecular beams

Description: High resolution He I[alpha] photoelectron spectroscopy of formaldehyde and ketene and their deuterated compounds, are reported. The combination of a (H2CO) double-pass high-resolution electron-energy analyzer and effective rotational cooling of the sample by supersonic expansion enable the spectroscopy of these molecular cations. The vibrational autocorrelation functions are calculated from the high-resolution photoelectron spectra, shedding light on the ultrafast intramolecular dynamics of the… more
Date: September 1, 1992
Creator: Niu, B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Shelf-life determination of epoxy prepregs and film adhesives

Description: Epoxy prepregs and film adhesives are composed of partially cured (''B'' staged) epoxy resins and, in the case of the prepregs, a fiber matrix. Purchased epoxy prepreg lots typically are accepted or rejected on the basis of resin content, gel time, and resin flow. The shelf-life storage conditions of both materials generally are based on vendor recommendation. At The Bendix Corporation, Kansas City Division, there has been concern recently with shelf-life aging of a Kevlar/epoxy prepreg. At pre… more
Date: January 1, 1978
Creator: Parker, B. G. & Smith, C. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Organic constituents in process water from the in-situ retorting of oil from oil-shale kerogen

Description: Capillary-column gas-chromatography/mass-spectrometry (GC/MS) was performed on the acid, base, and neutral fractions of liquid- and particulate-phase methylene chloride extracts of a composite sample of raw process water collected from separator Tank 6 by the Laramie Energy Technology Center. Of the 160 extractable and chromatographable organic compounds tentatively identified, the following compound classes were found (listed in decreasing order of abundance): quinolines and lower fatty acids,… more
Date: February 1, 1981
Creator: Raphaelian, L A & Harrison, W
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Synthesis and reactivity of ultra-fine coal liquefaction catalysts

Description: The Pacific Northwest Laboratory is currently developing ultra-fine iron-based coal liquefaction catalysts using two new particle production technologies: (1) modified reverse micelles (MRM) and (2) rapid thermal decomposition of solutes (RTDS). These methodologies have been shown to allow control over both particle size (from 1 nm to 60 nm) and composition when used to produce ultra-fine iron-based materials. Powders produced using these methods are found to be selective catalysts for carbon-c… more
Date: October 1, 1992
Creator: Linehan, J. C.; Matson, D. W.; Fulton, J. L.; Bean, R. M. & Darab, J. G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Chlorophyll-quinone photochemistry in liposomes: mechanisms of radical formation and decay

Description: Laser flash photolysis has been used to investigate the mechanism of formation and decay of the radical species generated by light induced electron transfer from chlorophyll a triplet to quinone in egg phosphatidyl choline bilayer vesicles. Chlorophyll triplet quenching by quinone is controlled by diffusion occurring within the bilayer membrane and reflects bilayer viscosity. Radical formation via separation of the intermediate ion pair is also inhibited by increased bilayer viscosity. Cooperat… more
Date: January 1, 1980
Creator: Hurley, J.K. & Tollin, G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Electron flow through plastoquinone and cytochromes b/sub 6/ and f in chloroplasts

Description: With dark-adapted chlorplasts in which the plastoquinone is oxidized a partial reduction of cytochrome b/sub 6/ is obtained upon illumination with a pair of short saturating flashes. The second flash of the pair is much more effective than the first flash, and the reduction is inhibited by the system II inhibitor diuron. When the plastoquinone pool is reduced both the reduction and the oxidation of cytochrome b/sub 6/ are accelerated. The cytochrome b/sub 6/ oxidation appears to proceed in asso… more
Date: January 1, 1978
Creator: Velthuys, B.R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Epoxy replication for Wolter x-ray microscope fabrication

Description: An epoxy replica of a test piece designed to simulate a Wolter x-ray microscope geometry showed no loss of x-ray reflectivity or resolution, compared to the original. The test piece was a diamond-turned cone with 1.5/sup 0/ half angle. A flat was fly-cut on one side, then super- and conventionally polished. The replica was separated at the 1.5/sup 0/-draft angle, simulating a shallow angle Wolter microscope geometry. A test with 8.34 A x rays at 0.9/sup 0/ grazing angle showed a reflectivity of… more
Date: January 1, 1981
Creator: Priedhorsky, W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Biodegradation of hazardous waste using white rot fungus: Project planning and concept development document

Description: The white rot fungus Phanerochaete chrysosporium has been shown to effectively degrade pollutants such as trichlorophenol, polychlorinated biphenyls (PCBs), dioxins and other halogenated aromatic compounds. These refractory organic compounds and many others have been identified in the tank waste, groundwater and soil of various US Department of Energy (DOE) sites. The treatment of these refractory organic compounds has been identified as a high priority for DOE's Research, Development, Demonstr… more
Date: November 1, 1990
Creator: Luey, J.; Brouns, T. M. & Elliott, M. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Oak Ridge Flywheel Evaluation Laboratory. Annual report, October 1, 1979-September 30, 1980

Description: The purpose of the Oak Ridge Flywheel Evaluation Laboratory Annual Report is to present work performed for and funded by the Mechanical Energy Storage Technology Project at Lawrence Livermore National Laboratory (LLNL). In addition to the management sections (schedules, budgets, and facility accomplishments), summaries are given for the ultimate speed evaluations of one flywheel built by Union Carbide Corporation, Nuclear Division (UCC-ND); four flywheels constructed under subcontracts from San… more
Date: April 30, 1981
Creator: Steele, Jr., R. S.; Babelay, Jr., E. F. & Sutton, B. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Coal Liquefaction Process Streams Characterization and Evaluation: The Use of Selective Chemical Reactions and Carbon NMR Spectroscopy in the Speciation and Quantification of Oxygen Functional Groups in Coal Resids

Description: This study demonstrated the feasibility of using phase-transfer methylation reactions for the derivatization of hydroxyl functionalities and single-electron transfer reactions to cleave ether groups in distillation resid materials derived from direct coal liquefaction. {sup 13}C-NMR was used to analyze the reaction products. It was demonstrated that the techniques can be used to speciate and quantify about half of the oxygen in resids. The remaining half of the oxygen is presumed to be present … more
Date: November 1, 1992
Creator: Stock, L. M. & Cheng, C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Behavior of Kevlar 49 fabric/epoxy laminates subjected to pin bearing loads

Description: The low compressive strength of Kevlar reinforced composites causes concern about the ability of these materials to withstand bearing loads in bolted joints. This paper presents the results of an experimental investigation of the pin bearing load-deflection response of (0/90/+-45), (0/90) and (+-45) Kevlar 49 fabric/epoxy laminates. Laminate thicknesses from 0.075 in. to 0.300 in. were examined for pin diameters ranging from 0.125 in. to 0.500 in. Results of this study revealed three significan… more
Date: April 1, 1977
Creator: Allred, R. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Photosensitization in biological systems

Description: Our symposium examines the current status of our knowledge of the photosensitized reactions of nucleic acids and proteins. Significant advances have been made in this area of photobiology since the last international Congress. The first paper will explore the role of molecular oxygen in photosensitized reactions of proteins and nucleic acids. The last three papers are concerned primarily with photosensitized reactions of nucleic acids and their components in which the sensitizer is consumed by … more
Date: January 1, 1976
Creator: Spikes, J. D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Laminated beams: deflection and stress as a function of epoxy shear modulus

Description: The large toroidal field coil deflections observed during the PLT power test are due to the poor shear behavior of the insulation material used between layers of copper. Standard techniques for analyzing such laminated structures do not account for this effect. This paper presents an analysis of laminated beams that corrects this deficiency. The analysis explicitly models the mechanical behavior of each layer in a laminated beam and hence avoids the pitfalls involved in any averaging technique.… more
Date: January 1, 1976
Creator: Bialek, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Heterogeneous catalytic process for alcohol fuels from syngas. Sixth quarterly technical progress report, April--June 1993

Description: The principal objectives of this project are to discover and evaluate novel heterogeneous catalysts for conversion of syngas to oxygenates having use as fuel enhancers, to explore novel reactor and process concepts applicable in this process, and to develop the best total process for converting syngas to liquid fuels. The project is being pursued as two concurrent tasks. Task 1 involves catalyst research and development and is being largely conducted by catalyst chemists and analytical speciali… more
Date: November 1, 1993
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Variations in organic oxygen structures in the Argonne premium coals as a function of rank

Description: It has been found that MS and NMR results on oxygenated species in coal correlate quite nicely. As expected, from previous studies, structures related to lignin dominate in the lower rank coals. However, benzofurans and dibenzofurans make an important contribution to the overall distribution. Singly and multiply hydroxylated benzene rings are the major oxygen structures in the low rank coals. In addition, carboxylic acids are quite abundant. In the bituminous coals, carboxylic acids are absent … more
Date: September 1, 1993
Creator: Winans, R. E.; McBeth, R. L.; Melnikov, P. E. & Botto, R. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Low temperature lithium/sulfur secondary battery. Annual progress report, December 1, 1974--December 1, 1975. [Ambient-temperature battery with dissolved S]

Description: The purpose of this program is to develop an ambient-temperature Li/S secondary battery. The proposed configuration is Li/organic electrolyte, dissolved S/catalytic electrode or current collector. This battery will have an energy density of 100 Wh/lb, including the weight of cell hardware. Investigations of S solubility and electrochemistry have been undertaken in polar, aprotic nonaqueous solvents, chosen for their stability toward Li. Highest S solubility was achieved if S was dissolved in th… more
Date: April 1, 1976
Creator: Brummer, S. B.; Rauh, R. D.; Marston, J. M. & Shuker, F. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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