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Molecular Dynamics Studies on the Effects of Water Speciation on Interfacial Structure and Dynamics in Silica-Filled PDMS Composites

Description: Significant changes in materials properties of siloxane based polymers can be obtained by the addition of inorganic fillers. In silica-filled polydimethylsiloxane (PDMS) based composites the mechanism of this reinforcing behavior is presumably hydrogen bonding between surface hydroxyls and backbone siloxane species. We have chosen to investigate in detail the effect of chemisorbed and physisorbed water on the interfacial structure and dynamics in silica-filled PDMS based composites. Toward this… more
Date: November 21, 2001
Creator: Gee, R H; Maxwell, R S; Dinh, L N & Balazs, B
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Wairakite: A Potential Indicator of Fluid Mixing

Description: Wairakite is a common geothermal mineral. Detailed paragenetic studies indicate that wairakite typically forms after the deposition of epidote {plus_minus} prehnite and later anhydrite + calcite. Epidote and prehnite are interpreted as products of early, high temperature alteration associated with upswelling reservoir fluids whereas calcite and anhydrite are related to descending acidic condensates. Calculated stability relationships among the calc silicate minerals indicates that cooling and/o… more
Date: January 28, 2005
Creator: Moore, J; Bruton, C & Powell, T
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Partner: UNT Libraries Government Documents Department
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Solubility of Anthracene in Binary and Ternary Mixtures of Cyclohexanone, Ethyl Acetate, and Methanol at 298.2 K

Description: This article discusses the solubility of anthracene in binary and ternary mixtures of cyclohexanone, ethyl acetate, and methanol at 298.2 K.
Date: May 10, 2010
Creator: Jouyban, Abolghasem; Manzoori, Jamshid L.; Panahi-Azar, Vahid; Soleymani, Jafar; Fakhree, Mohammad Amin Abolghassemi; Shayanfar, Ali et al.
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Partner: UNT College of Arts and Sciences
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Predicting the Rate by which Suspended Solids Plug Geothermal Injection Wells

Description: Standard membrane filtration tests have been used by the oil industry for more than 20 years to evaluate injection well performance. Published analytical models are also available fore relating filtration data to injector lifetimes. We have utilized these techniques to evaluate injection at the Salton Sea Geothermal Field, Southern California. Results indicate that direct injection into reservoir zones with primary porosity is not feasible unless 1-micrometer or larger particulates formed durin… more
Date: December 14, 1977
Creator: Owen, L.B.; Kasameyer, P.W.; Netherton, R. & Thorson, L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Pilot plant studies of the bioconversion of cellulose and production of ethanol

Description: Work for the period July 1 to September 30, 1977 is summarized briefly. Results of the following studies are reported: analysis and evaluation of potential raw materials--chemical analysis of the Kudzu plant and effect of NO/sub x/ pretreatments on the hydrolysis of wheat straw; utilization of hemicellulose sugars; process design and economic studies--hydrolysis process and ethanol fermentation; pilot plant process development and design studies--enhanced cellulase production and continuous hyd… more
Date: September 30, 1977
Creator: Wilke, C. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Distribution of energy in bimolecular chemiluminescent reactions involving hydrogen atoms. Progress report, May 1, 1973--April 30, 1974

Description: The final stages of development of a crossed molecular beam apparatus for the study of bimolecular chemiluminescent reactions involving hydrogen atoms are described. A stable, high intensity, high energy source of H atoms is operating and its intensity was estimated by two different methods to be ~10/sup 15/ H atoms/cm/sup 2/-sec at 1 meter. The determination of the velocity distribution of H atoms from this source is the only remaining major project planned prior to observation of chemilumines… more
Date: January 1, 1974
Creator: Stwalley, W.C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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ICP dry etching of III-V nitrides

Description: Inductively coupled plasma etching of GaN, AlN, InN, InGaN and InAlN was investigated in CH{sub 4}/H{sub 2}/Ar plasmas as a function of dc bias, and ICP power. The etch rates were generally quite low, as is common for III-nitrides in CH{sub 4} based chemistries. The etch rates increased with increasing dc bias. At low rf power (150 W), the etch rates increased with increasing ICP power, while at 350 W rf power, a peak was found between 500 and 750 W ICP power. The etched surfaces were found to … more
Date: October 1, 1997
Creator: Vartuli, C. B.; Lee, J. W. & MacKenzie, J. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Hydrothermal interaction of Topopah Spring tuff with J-13 water as a function of temperature

Description: In support of the Nevada Nuclear Waste Storage Investigations Project experiments were conducted to study the hydrothermal interaction of rock and water representative of a potential repository in tuff. These experiments provided data relevant to near-field repository conditions that can be used to: assess the ability to use accelerated tests based on the SA/V (surface area/volume) parameter and temperature; allow the measurement of chemical changes in phases present in the tuff before reaction… more
Date: November 30, 1984
Creator: Knauss, K. G.; Delany, J. M.; Beiriger, W. J. & Peifer, D. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Trace elements in coal: Modes of occurrence analysis. Technical progress report, October 5, 1995--March 31, 1996

Description: CQ, Inc. proposed to quantify the relationship between the modes of occurrence of twelve trace hazardous air pollutants (HAP`s) elements in coal and the degree that each element can be removed by existing and advanced physical and chemical coal cleaning processes. They also proposed to investigate new chemical and biological trace element removal processes, and estimate the concentration and stability of trace elements in coal preparation plant tailings. The ultimate goal of this effort is to p… more
Date: October 1, 1996
Creator: Palmer, C.A.; Findelman, R.B.; Belkin, H.E. & Crowley, S.S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Separation of flue-gas scrubber sludge into marketable products. Quarterly technical progress report No. 12, June 1, 1996--August 30, 1996

Description: To reduce their sulfur emissions, many coal-fired electric power plants use wet flue-gas scrubbers. These scrubbers convert sulfur oxides into solid sulfate and sulfite sludge, which must then be disposed of. This sludge is a result of reacting limestone with sulfur dioxide to precipitate calcium sulfite and calcium sulfate. It consists of calcium sulfite, gypsum, and unreacted limestone or lime, with miscellaneous objectionable impurities such as iron oxides, silicates, and magnesium, sodium, … more
Date: September 1, 1996
Creator: Kawatra, S. K. & Eisele, T. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Diffusive transport in modern polymeric materials

Description: This is the final report of a one-year, Laboratory-Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). Polymers, composites, and synthetic modern materials are replacing traditional materials in many older scientific, engineering, commercial, and military applications. This project sought to focus on the new polymeric materials, deriving and analyzing models that predict their seemingly mysterious transport properties. It sought to identify the dominan… more
Date: October 1, 1996
Creator: Doering, C.; Bier, M. & Christodoulou, K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Fractal analysis of granular activated carbons using isotherm data

Description: Utilization of adsorption on solid surfaces was exercised for the first time in 1785. Practical application of unactivated carbon filters, and powdered carbon were first demonstrated in the American water treatment plant, and a municipal treatment plant in New Jersey, in 1883 and 1930, respectively. The use of activated carbon became widespread in the next few decades. At present, adsorption on carbons has a wide spread application in water treatment and removal of taste, odor, removal of synth… more
Date: August 1, 1997
Creator: Khalili, N. R.; Pan, M. & Sandi, G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Critical scientific issues in the demonstration of WIPP compliance with EPA repository standards

Description: The Department of Energy submitted a Compliance Certification Application for the Waste Isolation Pilot Plant to the Environmental Protection Agency (EPA) in October, 1996. A critical part of this application was a Performance Assessment which predicts the cumulative radioactive release to the accessible environment over a time period of 10,000 years. Comparison of this predicted release to the EPA standard shows a comfortable margin of compliance. The scientific understanding that was critical… more
Date: December 1, 1997
Creator: Weart, W. D. & Chu, M. S. Y.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Induced biochemical interactions in crude oils

Description: In the evolution of oil from sedimentary to reservoir conditions, the hydrogen to carbon ratios decrease while the oxygen, nitrogen, and sulfur to carbon ratios increase. During this process, the oils become heavier and richer in asphaltenes. In terms of chemical composition, the oils become enriched in resins, asphaltenes, and polar compounds containing the heteroatoms and metals. Over the geological periods of time, the chemical and physical changes have been brought about by chemical, biolog… more
Date: August 1, 1996
Creator: Premuzic, E.T. & Lin, M.S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Initial investigations of SNS target facility accident source terms

Description: The Spallation Neutron Source (SNS) is a Department of Energy, accelerator-based neutron source proposed for construction at the Oak Ridge National Laboratory. The project is currently nearing the end of the conceptual design stage. The objective of the target facility is to provide beams of pulsed thermal and sub-thermal neutrons for research purposes. The neutrons are created by the action of highly energetic protons ({approximately} 1 GeV) on a mercury target. The proton beam power will be 1… more
Date: July 1, 1998
Creator: Harrington, R. M.; Devore, J. R.; Beahm, E. C.; Weber, C. F. & Johnson, J. O.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Flibe assessments.

Description: An assessment of the issues on using flibe for fusion applications has been made. It is concluded that sufficient tritium breeding can be achieved for a flibe blanket, especially if a few cm of Be is include in the blanket design. A key issue is the control of the transmutation products such as TF and F{sub 2}. A REDOX (Reducing-Oxidation) reaction has to be demonstrated which is compatible to the blanket design. Also, MHD may have strong impact on heat transfer if the flow is perpendicular to … more
Date: November 15, 2000
Creator: Sze, D. K.; McCarthy, K.; Sawan, M.; Tillack, M.; Ying, A. & Zinkle, S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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High real-space resolution structure of materials by high-energy x-ray diffraction

Description: Results of high-energy synchrotrons radiation experiments are presented demonstrating the advantages of the atomic Pair Distribution Function technique in determining the structure of materials with high resolution.
Date: December 10, 1999
Creator: Petkov, V.; Billinge, S. J. L.; Heising, J.; Kanatzidis, M. G.; Shastri, S. & Kycia, S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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