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Development of BEACON technology. Quarterly report, October-December 1982

Description: The BEACON process involves the catalytic deposition of a highly reactive form of carbon from a gas stream which contains carbon monoxide. The carbon-depleted gas is combusted with air to produce power, and the carbon is reacted with steam to produce methane or hydrogen. During the quarter both SOHIO and TRW worked on catalysts which would suppress methane formation during steaming thus increasing the amount of hydrogen formed. At SOHIO a C77-K2 catalyst promoted with a Class II compound showed… more
Date: April 1, 1983
Partner: UNT Libraries Government Documents Department
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Study of the mechanism of carcinogenesis by carcinogens which are negative in the Ames test. Progress report. [ICE; TUMOR PROMOTERS; PROGESTERONE; QUANTITY RATIO; RATS]

Description: Research progress for 1980 is reported. The role of tRNA methyltransferases in two-1 stage carcinogenesis of mice by phorbol esters has been investigated. The mechanisms of elevation of progesterone levels in the rat by ethionine have also beed studied. (ACR)
Date: unknown
Creator: Borek, E.
Partner: UNT Libraries Government Documents Department
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Comparison of in-vitro and in-vivo studies with coal liquids from the SRC-II process

Description: Coal liquids obtained from the SRC-II process and fractions prepared from these liquids have been assayed in a number of in vivo and in vitro systems for biological activity. The in vitro systems includes: (1) the standard Ames Salmonella typhimurium reverse mutation assay, (2) the S. typhimurium fluctuation test; (3) forward mutation assay in S. typhimurium (8-Ag) test; (4) prophage induction (INDUCTEST); (5) Syrian hamster ovary (SHE) cell transformation assay; and (6) Chinese hamster ovary (… more
Date: September 1, 1983
Creator: Mahlum, D. D.; Frazier, M. E.; Pelroy, R. A. & Renne, R. A.
Partner: UNT Libraries Government Documents Department
open access

The Role of Multiple Transcription Factors In Archaeal Gene Expression

Description: Since the inception of this research program, the project has focused on two central questions: What is the relationship between the 'eukaryal-like' transcription machinery of archaeal cells and its counterparts in eukaryal cells? And, how does the archaeal cell control gene expression using its mosaic of eukaryal core transcription machinery and its bacterial-like transcription regulatory proteins? During the grant period we have addressed these questions using a variety of in vivo approaches … more
Date: September 23, 2008
Creator: Daniels, Charles J.
Partner: UNT Libraries Government Documents Department
open access

Final Technical Report

Description: P. fluorescens PfO-1 is a soil bacterium isolated by this laboratory from sandy loam soil (4). Because of the importance of adhesion for persistence in natural environments, we utilized adherence to sand as an assay to screen a library of PfO-1 mutants for defects in adhesion. Three adhesion defective mutants, PfO-5, PfO-10, and PfO-15 were recovered. PfO-5 and PfO-10 had different insertions in the same gene, which we called adnA, and also showed motility defects (3). PfO-15 was motile, but wa… more
Date: July 7, 2008
Creator: Stuart B. Levy, M.D.
Partner: UNT Libraries Government Documents Department
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Rapid detection of biothreat agents based on cellular machinery.

Description: This research addresses rapid and sensitive identification of biological agents in a complex background. We attempted to devise a method by which the specificity of the cellular transcriptional machinery could be used to detect and identify bacterial bio-terror agents in a background of other organisms. Bacterial cells contain RNA polymerases and transcription factors that transcribe genes into mRNA for translation into proteins. RNA polymerases in conjunction with transcription factors recogni… more
Date: December 1, 2004
Creator: Lane, Todd W. & Gantt, Richard W.
Partner: UNT Libraries Government Documents Department
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Evaluation of Promoters for Rhodium-Based Catalysts for Mixed Alcohol Synthesis

Description: Pacific Northwest National Laboratory (PNNL) and National Renewable Energy Laboratory (NREL) are conducting research to investigate the feasibility of producing mixed alcohols from biomass-derived synthesis gas (syngas). PNNL is tasked with obtaining commercially-available catalysts or preparing promising mixed-alcohol catalysts and screening them in a laboratory-scale reactor system. Commercially-available catalysts and the most promising experimental catalysts are provided to NREL for testing… more
Date: December 8, 2008
Creator: Gerber, Mark A.; White, James F.; Gray, Michel J. & Stevens, Don J.
Partner: UNT Libraries Government Documents Department
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Review of Novel Catalysts for Biomass Tar Cracking and Methane Reforming

Description: A review of the literature was conducted to examine the performance of catalysts other than conventional nickel catalysts, and alkaline earth and olivine based catalysts for treating hot raw product gas from a biomass gasifier to convert methane and tars into synthesis gas. Metal catalysts other than Ni included precious metals Rh, Ru, Ir, Pt, and Pd, as well as Cu, Co, and Fe in limited testing. Nickel catalysts promoted with Rh, Zr, Mn, Mo, Ti, Ag, or Sn were also examined, as were Ni catalys… more
Date: October 10, 2007
Creator: Gerber, Mark A.
Partner: UNT Libraries Government Documents Department
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Mixed Alcohol Synthesis Catalyst Screening 2007 Progress Report

Description: Pacific Northwest National Laboratory (PNNL) and National Renewable Energy Laboratory (NREL) are researching the feasibility of producing mixed alcohols from biomass-derived synthesis gas (syngas). PNNL is obtaining commercially available mixed alcohol or preparing promising mixed-alcohol catalysts and screening them in a laboratory-scale reactor system. The most promising catalysts are provided to NREL for testing using a slipstream from a pilot-scale biomass gasifier. After a review of the li… more
Date: November 1, 2007
Creator: Gerber, Mark A.; White, J. F.; Gray, Michel J. & Stevens, Don J.
Partner: UNT Libraries Government Documents Department
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The Forcing of Mercury Oxidation as a Means of Promoting Low-Cost Capture

Description: Trace amounts of mercury are found in all coals. During combustion this mercury is vaporized and can be released to the atmosphere. This has been a cause for concern for a number of years, and has resulted in a determination by the EPA to regulate and control these emissions. Present technology does not, however, provide inexpensive ways to capture or remove mercury from flue gases. The mercury that exits the furnace in the oxidized form (HgCl{sub 2}) is known to much more easily captured in ex… more
Date: March 30, 2003
Creator: Kramlich, John C. & Castiglone, Linda
Partner: UNT Libraries Government Documents Department
open access

Annual progress report

Description: Emphasis during the past year has been on studies of the effects of potential promoting agents on radiation transformation, and of transformation by internal radionuclides emitting high LET radiation. We have also carried out a detailed investigation of the dosimetry of our alpha radiation source. Preliminary studies on the mechanisms of radiation transformation have been initiated as described in the previous proposal. Studies on promotion have focused on the effects of: (1) the endogenous ste… more
Date: June 1, 1981
Creator: Little, J. B.
Partner: UNT Libraries Government Documents Department
open access

Coal-derived promoters for the liquefaction of Illinois coal

Description: The objective of this program is to investigate the use of liquids derived from coal either by mild gasification or supercritical extraction (SCE) to promote direct liquefaction of Illinois coal. Some organic sulfur-, nitrogen-, and oxygen-containing compounds have been found to enhance liquefaction reactions. The use of Illinois coal to produce liquid fractions rich in these types of compounds could increase the rates of liquefaction reactions, thus improving the process economics. An integrat… more
Date: January 1, 1991
Creator: Carty, R. H.
Partner: UNT Libraries Government Documents Department
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Genetic analysis of photoreceptor action pathways in Arabidopsis thaliana

Description: The specific strategies and long-term goals of this proposal remain intact relative to the original proposal. We continue to isolate and characterize photomorphogenic mutants of Arabidopsis thaliana. The molecular and biochemical characterization of one of these mutants, det1, has led to one publication of original data and to one Society for Experimental Biology Symposium paper (see below). The phenotype of a second mutant, det2, has also been studied during this funding period. In addition, w… more
Date: January 1, 1991
Partner: UNT Libraries Government Documents Department
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Effect of LET and microdistribution of radiation on the transformation in vitro and in vivo. Comprehensive progress report

Description: Work has involved the following three areas: (1) an investigation of the mechanisms of radiation carcinogenesis by studying the events involved in the process of malignant transformation of mouse 10 T-1/2 cells; (2) an investigation of the effects of promoting agents on radiation-induced transformation in vitro; and (3) an investigation of the induction of transformation by internally emitting radionuclides incorporated into cellular DNA. The latter area has been extended to include studies of … more
Date: September 1, 1983
Creator: Little, J. B.
Partner: UNT Libraries Government Documents Department
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Partial control of complex processing systems

Description: The past year saw substantial advances in the development of a model of Fluidized Catalytic Crackers, which now allows one to calculate both steady state and dynamic behavior of the system as basis for control studies. The first goal was to elucidate nonlinear features using the model. The model shows that adding a combustion promoter that catalyzes the CO-CO[sub 2] reaction reduces chances for multiple steady states within the range of desirable operating conditions; by adding enough promoter,… more
Date: January 1, 1993
Creator: Shinnar, R.
Partner: UNT Libraries Government Documents Department
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Chemical interactions in multimetal/zeolite catalysts

Description: Research is proposed on two groups of zeolite based catalysts that contain two transition elements. In one group both metals are fully reduced, in the other group one element is left as a positive ion; it can act as a chemical anchor'', or as a catalyst promoter for the reduced metal. The objective is to explore the potential of such materials for designing superior catalysts for synthesis and conversion of hydrocarbons and other energy carriers. ENDOR, EXAFS, CO-FTIR and TPD will be used to id… more
Date: December 21, 1992
Creator: Sachtler, W.M.H.
Partner: UNT Libraries Government Documents Department
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Deactivation by Carbon of Iron Catalysts for Indirect Liquefaction

Description: This report describes recent progress in a fundamental, three-year investigation of carbon formation and its effects on the activity and selectivity of promoted iron catalysts for Fischer-Tropsch (FT) synthesis, the objectives of which are: determine rates and mechanisms of carbon deactivation of unsupported Fe and Fe/K catalysts during CO hydrogenation over a range of CO concentrations, CO:H{sub 2} ratios, and temperatures; model the rates of deactivation of the same catalysts in fixed-bed rea… more
Date: October 11, 1990
Creator: Bartholomew, C. H.
Partner: UNT Libraries Government Documents Department
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Development of a stable cobalt-ruthenium Fischer-Tropsch catalyst

Description: The work performed in the program suggests that cobalt catalytic performance is a complex function of crystallite size, crystallite composition, and cobalt-support interaction. These properties are determined by the nature of support, the bimetallic component, the promoters, and the method of preparation. Results so far indicate that the lowest methane selectivity occurs on support No. 8, and the highest activity is obtained on support No. 10. Also, promoters 2 and 3 may help lower the formatio… more
Date: August 26, 1992
Creator: Abrevaya, H.
Partner: UNT Libraries Government Documents Department
open access

Coal-derived promoters for the liquefaction of Illinois coal. Technical report, September 1, 1991--November 30, 1991

Description: The objective of this program is to investigate the use of liquids derived from coal either by mild gasification or supercritical extraction (SCE) to promote direct liquefaction of Illinois coal. Some organic sulfur-, nitrogen-, and oxygen-containing compounds have been found to enhance liquefaction reactions. The use of Illinois coal to produce liquid fractions rich in these types of compounds could increase the rates of liquefaction reactions, thus improving the process economics. An integrat… more
Date: December 31, 1991
Creator: Carty, R. H.
Partner: UNT Libraries Government Documents Department
open access

Technology development for iron Fischer-Tropsch catalysts. Technical progress report No. 8, July 1, 1992--September 30, 1992

Description: The objectives of this contract are to develop a technology for the production of active and stable iron Fischer-Tropsch catalysts for use in slurry-phase synthesis reactors and to develop a scaleup procedure for large-scale synthesis of such catalysts for process development and long-term testing in slurry bubble-column reactors. With a feed containing hydrogen and carbon monoxide in the molar ratio of 0.5 to 1.0 to the slurry bubble-column reactor, the catalyst performance target is 88% CO + … more
Date: December 31, 1992
Creator: Frame, R. R. & Gala, H. B.
Partner: UNT Libraries Government Documents Department
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Development of improved iron Fischer-Tropsch catalysts. Final technical report: Project 6464

Description: Despite the current worldwide oil glut, the United States will ultimately require large-scale production of liquid (transportation) fuels from coal. Slurry phase Fischer Tropsch (FT) technology, with its versatile product slate, may be expected to play a major role in production of transportation fuels via indirect coal liquefaction. Texas A&M University (TAMU) with sponsorship from the US Department of Energy, Center for Energy and Mineral Resources at TAMU, Texas Higher Education Coordinating… more
Date: February 28, 1994
Creator: Bukur, D. B.; Ledakowicz, S. & Koranne, M.
Partner: UNT Libraries Government Documents Department
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Characterization of embryo-specific genes. Final report, April 1, 1987--March 31, 1992

Description: The objective of the proposed research is to characterize the function and regulation of a set of embryonic genes which are expressed in the embryos, not in the plants. 22 cDNA clones were isolated from a cDNA library we constructed using mRNAS of -carrot somatic embryos. These cDNA clones identified mRNA species that are present in the somatic and zygotic embryos, but not in adult plants. The sequence of all 22cDNA clones were determined; genomic clones for three cDNA clones, DC8, DC59, and DC… more
Date: June 12, 1992
Creator: Sung, R.
Partner: UNT Libraries Government Documents Department
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Methyl chloride via oxyhydrochlorination of methane. Quarterly technical progress report No. 7, April--June 1993

Description: The purpose of this contract is to develop a process for converting light alkane gases to methyl chloride via oxyhydrochlorination using highly selective, stable catalysts in fixed-bed reactors designed to remove the large amount of heat generated, so as to control the reaction temperature. Further, the objective is to obtain the engineering data base necessary for developing a commercially feasible process and to evaluate the economics of the process. Several key technology areas were evaluate… more
Date: January 1, 1994
Partner: UNT Libraries Government Documents Department
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Development of vanadium-phosphate catalysts for methanol production by selective oxidation of methane. Quarterly technical progress report No.2, January--March 1993

Description: During the second quarter, we initiated Task 2 (Process and Catalyst Variable Study). This task involves an investigation of methods for vanadium phosphate (VPO) catalyst synthesis and activation as well as detailed testing of the catalysts produced for activity and selectivity in methane selective oxidation. As we initiated work on Task 2, three problem areas were identified: Preparation of catalysts with P:V ratio greater than 1. Activation of the precursor to produce the B-phase described in… more
Date: May 11, 1993
Creator: McCormick, Robert L. & Jha, Mahesh C.
Partner: UNT Libraries Government Documents Department
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