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Enzymology of acetone-butanol-isopropanol formation

Description: The long-term goal of the project is to understand the fundamental properties of biological solvent production. Our approach is to elucidate first the molecular properties of solvent-producing enzymes and then to apply to information gained from the enzymological study to investigate control mechanisms for the solvent-producing pathways and the expression of solvent-production genes. Our research primarily involves two strains of Clostridium beijerinckii: C. Beijerinckii NRRL B593 which produce… more
Date: January 1, 1992
Creator: Chen, Jiann-Shin
Partner: UNT Libraries Government Documents Department
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Unravelling lignin formation and structure

Description: During this study, we established that the Fagaceae exclusively accumulate Z-monolignois/glucosides, and not the E-isomers. Evidence for the presence of a novel E{yields}Z isomerse has been obtained. Our pioneering work in lignin biosynthesis and structure in situ has also progressed smoothly. We established the bonding environments of a woody angiosperm, Leucanea leucocephala, as well as wheat (T. aestivum) and tobacco (N. tabacum). A cell culture system from Pinus taeda was developed which se… more
Date: January 1, 1991
Creator: Lewis, N. G.
Partner: UNT Libraries Government Documents Department
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STI-2062-1

Description: This project investigated solar variability, power conversion and electric power grid response aspects of high penetration solar PV. These are the primary determining factors for acceptable penetration levels. Therefore, the study not only focused on the power system interactions, but also on the design of advanced power conditioners to explore more efficient design options and to look into advanced control impacts to the higher penetration PV deployment systems. Through extensive laboratory an… more
Date: March 31, 2012
Creator: Lai, Jason; Yu, Wensong; Meehan, Kathleen; Key, Tom; Huque, Aminul; Smith, Jeff et al.
Partner: UNT Libraries Government Documents Department
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High Temperature, Low Relative Humidity, Polymer-type Membranes Based on Disulfonated Poly(arylene ether) Block and Random Copolymers Optionally Incorporating Protonic Conducting Layered Water insoluble Zirconium Fillers

Description: Our research group has been engaged in the past few years in the synthesis of biphenol based partially disulfonated poly(arylene ether sulfone) random copolymers as potential PEMs. This series of polymers are named as BPSH-xx, where BP stands for biphenol, S stands for sulfonated, H stands for acidified and xx represents the degree of disulfonation. All of these sulfonated copolymers phase separate to form nano scale hydrophilic and hydrophobic morphological domains. The hydrophilic phase conta… more
Date: June 3, 2010
Creator: McGrath, James E. & Baird, Donald G.
Partner: UNT Libraries Government Documents Department
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On-Line Self-Calibrating Single Crystal Sapphire Optical Sensor Instrumentation for Accurate and Reliable Coal Gasifier Temperature Measurement

Description: This report summarizes technical progress October 2006 - March 2007 on the Phase II program ''On-Line Self-Calibrating Single Crystal Sapphire Optical Sensor Instrumentation for Accurate and Reliable Coal Gasifier Temperature Measurement'', funded by the Federal Energy Technology Center of the U.S. Department of Energy, and performed by the Center for Photonics Technology of the Bradley Department of Electrical and Computer Engineering at Virginia Tech. The outcome of the first phase of this pr… more
Date: March 31, 2007
Creator: Cooper, Kristie & Wang, Anbo
Partner: UNT Libraries Government Documents Department
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Crosscutting Technology Development at the Center for Advanced Separation Technologies

Description: This Technical Progress Report describes progress made on the twenty nine subprojects awarded in the second year of Cooperative Agreement DE-FC26-02NT41607: Crosscutting Technology Development at the Center for Advanced Separation Technologies. This work is summarized in the body of the main report: the individual sub-project Technical Progress Reports are attached as Appendices.
Date: November 4, 2005
Creator: Hull, Christopher E.
Partner: UNT Libraries Government Documents Department
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In-Plant Testing of High-Efficiency Hydraulic Separators

Description: Hydraulic separators are commonly used for particle size classification and gravity concentration of minerals and coal. Unfortunately, the efficiency of these processes can be quite low due to poor equipment design and variations in feed consistency. To help alleviate these problems, an industry-driven R&D program has been undertaken to develop a new generation of hydraulic separators that are more efficient and less costly to operate and maintain. These units, which are commercially called… more
Date: June 30, 2006
Creator: Luttrell, G. H.; Honaker, R. Q.; Bratton, R. C.; Westerfield, T. C. & Kohmuench, J. N.
Partner: UNT Libraries Government Documents Department
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Single Crystal Sapphire Optical Fiber Sensor Instrumentation

Description: The goal of this 30 month program is to develop reliable accurate temperature sensors based on single crystal sapphire materials that can withstand the temperatures and corrosive agents present within the gasifier environment. The research for this reporting period has been segregated into two parallel paths--corrosion resistance measurements for single crystal sapphire fibers and investigation of single crystal sapphire sensor configurations. The ultimate goal of this phase one segment is to d… more
Date: October 28, 2000
Creator: Wang, Anbo; May, Russell & Pickrell, Gary R.
Partner: UNT Libraries Government Documents Department
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Dense Medium Cyclone Optimizaton: Final Technical Report

Description: Dense medium cyclones (DMCs) are known to be efficient, high-tonnage devices suitable for upgrading particles in the 50 to 0.5 mm size range. This versatile separator, which uses centrifugal forces to enhance the separation of fine particles that cannot be upgraded in static dense medium separators, can be found in most modern coal plants and in a variety of mineral plants treating iron ore, dolomite, diamonds, potash and lead-zinc ores. Due to the high tonnage, a small increase in DMC efficien… more
Date: June 30, 2005
Creator: Luttrell, Gerald H.; Barbee, Chris J.; Bethell, Peter J. & Wood, Chris J.
Partner: UNT Libraries Government Documents Department
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In-Plant Testing of High-Efficiency Hydraulic Separators

Description: The mineral processing industry has commonly utilized hydraulic separators throughout history for classification and gravity concentration of various minerals. More commonly referred to as hindered-bed or fluidized-bed separators, these units make use of differential particle settling rates to segregate particles according to shape, size, and/or density. As with any equipment, there are inefficiencies associated with its operation, which prompted an industry driven research program to further e… more
Date: July 20, 2004
Creator: Luttrell, G. H.; Honaker, R. Q.; Bratton, R. C.; Westerfield, T. C. & Kohmuench, J. N.
Partner: UNT Libraries Government Documents Department
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Establishment of the Center for Advanced Separation Technologies

Description: This Final Technical Report covers the eight sub-projects awarded in the first year and the five projects awarded in the second year of Cooperative Agreement DE-FC26-01NT41091: Establishment of the Center for Advanced Separation Technologies. This work is summarized in the body of the main report: the individual sub-project Technical Progress Reports are attached as Appendices.
Date: September 30, 2006
Creator: Hull, Christopher E.
Partner: UNT Libraries Government Documents Department
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Optical Fiber High Temperature Sensor Instrumentation for Energy Intensive Industries

Description: This report summarizes technical progress during the program “Optical Fiber High Temperature Sensor Instrumentation for Energy Intensive Industries”, performed by the Center for Photonics Technology of the Bradley Department of Electrical and Computer Engineering at Virginia Tech. The objective of this program was to use technology recently invented at Virginia Tech to develop and demonstrate the application of self-calibrating optical fiber temperature and pressure sensors to several key energ… more
Date: November 14, 2006
Creator: Cooper, Kristie L.; Wang, Anbo & Pickrell, Gary R.
Partner: UNT Libraries Government Documents Department
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Development of enhanced sulfur rejection processes

Description: Research at Virginia Tech led to the development of two complementary concepts for improving the removal of inorganic sulfur from many eastern U.S. coals. These concepts are referred to as Electrochemically Enhanced Sulfur Rejection (EESR) and Polymer Enhanced Sulfur Rejection (PESR) processes. The EESR process uses electrochemical techniques to suppress the formation of hydrophobic oxidation products believed to be responsible for the floatability of coal pyrite. The PESR process uses polymeri… more
Date: March 1996
Creator: Yoon, R. H.; Luttrell, G. H.; Adel, G. T. & Richardson, P. E.
Partner: UNT Libraries Government Documents Department
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Advanced Materials for PEM-Based Fuel Cell Systems

Description: Proton exchange membrane fuel cells (PEMFCs) are quickly becoming attractive alternative energy sources for transportation, stationary power, and small electronics due to the increasing cost and environmental hazards of traditional fossil fuels. Two main classes of PEMFCs include hydrogen/air or hydrogen/oxygen fuel cells and direct methanol fuel cells (DMFCs). The current benchmark membrane for both types of PEMFCs is Nafion, a perfluorinated sulfonated copolymer made by DuPont. Nafion copolym… more
Date: October 26, 2005
Creator: McGrath, James E.; Baird, Donald G. & Spakovsky, Michael von
Partner: UNT Libraries Government Documents Department
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Restoring Sustainable Forests on Appalachian Mined Lands for Wood Products, Renewable Energy, Carbon Sequestration, and Other Ecosystem Services Quarterly Report: July-September 2005

Description: The overall purpose of this project is to evaluate the biological and economic feasibility of restoring high-quality forests on mined land, and to measure carbon sequestration and wood production benefits that would be achieved from forest restoration procedures. We are currently estimating the acreage of lands in Virginia, West Virginia, Kentucky, Ohio, and Pennsylvania mined under SMCRA and reclaimed to non-forested post-mining land uses that are not currently under active management, and the… more
Date: December 1, 2005
Creator: Burger, James A.; Galbraith, J.; Fox, T.; Amacher, G.; Sullivan, J. & Zipper, C.
Partner: UNT Libraries Government Documents Department
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Appalachian Clean Coal Technology Consortium. Technical progress report, October 10, 1994--December 31, 1994

Description: The Appalachian Clean Coal Technology Consortium (ACCTC) has been established to help U.S. Coal producers, particularly those in the Appalachian region, increase the production of lower-sulfur coal. The cooperative research conducted as part of the consortium activities will help utilities meet the emissions standards established by the 1990 Clean Air Act Amendments, enhance the competitiveness of U.S. coals in the world market, create jobs in economically-depressed coal producing regions, and … more
Date: June 26, 1995
Creator: Feeley, T. J., III
Partner: UNT Libraries Government Documents Department
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Research and development of methods and tools for achieving and maintaining consensus processes in the face of change within and among government oversight agencies. Papers, presentations, and conferences for period October 1, 1992--March 31, 1994, Volume II

Description: In this paper, we describe a new research effort on consensus tied to the Environmental Restoration Program (ERP) within the U.S. Department of Energy`s Office of Defense Waste and Transportation Management (DWTM). We define consensus and explain why consensus decisions are not merely desirable but necessary in furthering ERP activities. As examples of our planned applied research, we first discuss Nominal Group Technique as a representative consensus-generating tool, and we conclude by describ… more
Date: June 1994
Partner: UNT Libraries Government Documents Department
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Enzymology of acetone-butanol-isopropanol formation. Progress report, June 16, 1990--June 15, 1993

Description: During the current project period, alcohol dehydrogenases (ADH) and acetoacetyl-CoA-reacting enzymes of C. beijerinckii were purified to homogeneity. Structural and catalytic properties of the purged enzymes were determined. A range of conditions was used to investigate the activity and stability of each enzyme. This information will facilitate the selection of differential assays and handling conditions for the unequivocal determination of the activity of a specific enzyme in crude extracts. I… more
Date: June 1993
Creator: Chen, Jiann-Shin
Partner: UNT Libraries Government Documents Department
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Research and development of methods and tools for achieving and maintaining consensus processes in the face of change within and among government oversight agencies. Progress report, October 1, 1992--March 31, 1994, Volume I

Description: This progress report summarizes our research activities under our consensus grant. In year five, we devoted much of our activities to completing fundamental research projects delayed because of the considerably stepped-up effort in consensus processes efforts during development of DOE`s Five Year Waste Plan (FYWP). Following our work on various procedures for bringing together groups such as the State and Tribal Government Working Group and the Stakeholders` Forum (both of which provide input t… more
Date: June 1994
Partner: UNT Libraries Government Documents Department
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Bench-scale testing of the Multi-Gravity Separator in combination with Microcel. Fifth quarterly report, October 1, 1993--December 31, 1993

Description: During the quarter ending December, 31, 1993, the independent, combined and long duration testing were completed for both the Pittsburgh No. 8 coal and the Illinois No. 6 coal. Overall, the project is on schedule and the bulk of the critical work, from a timing perspective, is complete. Table 1 summarizes the status of major project tasks as of December 31, 1993. Preliminary results provide strong evidence that combining the Microcel flotation column with the Multi-Gravity Separator has a syner… more
Date: January 1994
Partner: UNT Libraries Government Documents Department
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Engineering development of advanced physical fine coal cleaning for premium fuel applications: Subtask 3.3 - dewatering studies

Description: If successful, the novel Hydrophobic Dewatering (HD) process being developed in this project will be capable of efficiently removing moisture from fine coal without the expense and other related drawbacks associated with mechanical dewatering or thermal drying. In the HD process, a hydrophobic substance is added to a coal-water slurry to displace water from the surface of coal, while the spent hydrophobic substance is recovered for recycling. For this process to have commercialization potential… more
Date: October 1996
Creator: Yoon, R. H.; Phillips, D. I.; Sohn, S. M. & Luttrell, G. H.
Partner: UNT Libraries Government Documents Department
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Theoretical studies in few-body intermediate energy physics

Description: This report discusses: the pi-N-N system with two-term interactions in P(33) and P(11) partial wave channels; P-P reactions yielding a pions plus, a neutron and a proton at 800 Mev; N-N reactions yielding a nucleon and a delta particle; pion-nucleon-delta vertex; pion production from the isospin zero N-N channel; and pion and kaon electromagnetic polarizability. (LSP).
Date: August 1, 1991
Creator: Mizutani, T.
Partner: UNT Libraries Government Documents Department
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