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Quantitative Microanalysis with high Spatial Resolution: Application of FEG-DTEM XEDS Microanalysis to the Characterization of Complex Microstructures in Irradiated Low Alloy Steet

Description: To assist in the characterization of microstructural changes associated with irradiation damage in low alloy steels, the technique of quantitative x-ray mapping using a field emission gun scanning transmission electron microscope (FEG-STEM) equipped with an x-ray energy Dispersive spectrometer (XEDS) has been employed. Quantitative XEDS microanalyses of the matrix and grain boundaries of irradiated specimens have been compared with previous quantitative analyses obtained using 3D-Atom Probe Fie… more
Date: November 14, 2001
Creator: Williams, D.B., Watanabe, M. and Burke, M.G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Symposium on microscale separations and analysis. Final Technical Report

Description: The ''Symposium on Microscale Separations and Analysis'' event, held as a section of the American Chemical Society Annual meeting on 27 August 2001, brought together engineers, physicists, and chemists from both academia and industry to discuss the latest research in the area of biomolecule analysis on microfluidic devices for genomic and proteomic applications.
Date: August 27, 2001
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Final technical report for Interagency Agreement No. DE-AI02-98ER62683: Development of a functional genomics approach to use radiation-induced changes in gene expression to monitor for low dose and low dose-rate exposures

Description: Microarray analysis and other molecular biology techniques were used to investigate the regulation of gene expression following ionizing radiation exposure.
Date: October 23, 2001
Creator: Albert J. Fornace, Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Defects Induced in Fused Silica by High Power UV Laser Pulses at 355 nm

Description: Point defects induced in high quality optical-grade based silica by high power (>30 J/cm{sup 2}) 355 nm laser pulses have been investigated to elucidate the nature of laser damage in transparent optics designed for use at the National Ignition Facility (NIF). Six defects have been identified: the NBOHC (non-bridging oxygen hole center), a STE (self-trapped exciton), an ODC (oxygen-deficient center), interstitial oxygen, the E'{sub {gamma}}, and E'{sub 74}. The former four defects were identi… more
Date: March 23, 2001
Creator: Stevens-Kalceff, M A; Stesmans, A & Wong, J
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Corrosion resistance of stainless steels during thermal cycling in alkali nitrate molten salts.

Description: The corrosion behavior of three austenitic stainless steels was evaluated during thermal cycling in molten salt mixtures consisting of NaNO{sub 3} and KNO{sub 3}. Corrosion tests were conducted with Types 316, 316L and 304 stainless steels for more than 4000 hours and 500 thermal cycles at a maximum temperature of 565 C. Corrosion rates were determined by chemically descaling coupons. Metal losses ranged from 5 to 16 microns and thermal cycling resulted in moderately higher corrosion rates comp… more
Date: September 1, 2001
Creator: Bradshaw, Robert W. & Goods, Steven Howard
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Toxic Substances From Coal Combustion - A Comprehensive Assessment

Description: The Clean Air Act Amendments of 1990 identify a number of hazardous air pollutants (HAPs) as candidates for regulation. Should regulations be imposed on HAP emissions from coal-fired power plants, a sound understanding of the fundamental principles controlling the formation and partitioning of toxic species during coal combustion will be needed. With support from the National Energy Technology Laboratory (NETL), the Electric Power Research Institute, and VTT (Finland), Physical Sciences Inc. (P… more
Date: June 30, 2001
Creator: Senior, C. L.; Huggins, F.; Huffman, G. P.; Shah, N.; Yap, N.; Wendt, J. O. L. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Mass Sensor

Description: The purpose of this CRADA was to use Honeywell's experience in low temperature cofire ceramics and traditional ceramics to assemble a relatively low-cost, mass-producible miniature mass analyzer. The specific design, given to us by Mass Sensors, LLC, was used to test for helium. The direct benefit for the participant was to have a prototype unit assembled for the purpose of proof of concept and the ability to secure venture capital investors. From that, the company would begin producing their o… more
Date: January 18, 2001
Creator: Adams, B.E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A Case Study in Competitive Technical and Market Intelligence Support and Lessons Learned for the uChemLab LDRD Grand Challenge Project

Description: The {mu}ChemLab{trademark} Laboratory Directed Research and Development (LDRD) Grand Challenge project began in October 1996 and ended in September 2000. The technical managers of the {mu}ChemLab{trademark} project and the LDRD office, with the support of a consultant, conducted a competitive technical and market demand intelligence analysis of the {mu}ChemLab{trademark}. The managers used this knowledge to make project decisions and course adjustments. CTI/MDI positively impacted the project's… more
Date: November 1, 2001
Creator: SOUTHWELL, EDWIN T.; GARCIA, MARIE L. & MEYERS, CHARLES E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Sub-Angstrom transmission electron microscopy at 300keV

Description: We have demonstrated sub-Angstrom TEM to a resolution of 0.78 Angstrom with the one-Angstrom microscope (OAM) project at the National Center for Electron Microscopy. The OAM combines a modified CM300FEG-UT with computer software able to generate sub-Angstrom images from experimental image series. We achieved sub-Angstrom resolution with the OAM by paying close attention to detail. We placed the TEM in a favorable environment. We reduced its three-fold astigmatism A2 from 2.46mm to 300 Angstrom … more
Date: February 14, 2001
Creator: O'Keefe, Michael A.; Nelson, E. Christian; Turner, John H. & Thust, Andreas
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Modeling of the Microchemistry for Diffusion of Selected Impurities in Uranium

Description: Unalloyed metallic uranium used in some work done at Y-12 contains small quantities of impurities, the three most significant of which are carbon, iron, and silicon. During metallurgical processing, as the metal cools from a molten condition towards room temperature, the metallic matrix solution becomes supersaturated in each of the impurities whose concentration exceeds the solubility limit. Many impurity atoms form compounds with uranium that precipitate out of the solution, thus creating and… more
Date: September 1, 2001
Creator: Kirkpatrick, J. R. & Bullock, J. S., IV
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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