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in subjects: "37 Inorganic, Organic, Physical And Analytical Chemistry"  
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Method to prepare Semtex

Description: This procedure requires the binder and uncoated RDX be prepared in separate steps, see Figure 1: (1) The binder and dye are mixed by agitation with a water-insoluble organic solvent (e.g., toluene), I; (2) The RDX/PETN is agitated thoroughly with water, II; (3) The binder solution I is added to the RDX/water mixture at II with thorough mixing to form a slurry III; (4) In the next step the solvent is distilled off at IV leaving resulting granules; (5) The next step is followed by filtration at V… more
Date: November 26, 2006
Creator: Alcaraz, A. & Dougan, A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Evaluating GC/MS Performance

Description: Evaluating the chemical background in the GC/MS system (system background) and solvent purity. This procedure will allow the analyst to verify that the GC/MS is free of chemical interferences or contamination and verify the solvent being utilized is free of interferences - Conduct a GC/MS analysis without injecting a solvent (system background) and Conduct a GC/MS analysis inject 1uL of CH2Cl2 solvent (Solvent background). GC conditions: (1) Injector Temperature (C): Injector Temperature is typ… more
Date: November 26, 2006
Creator: Alcaraz, A. & Dougan, A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Final Technical Report: A Paradigm Shift in Chemical Processing: New Sustainable Chemistries for Low-VOC Coatings

Description: The project employed new processes to make emulsion polymers from reduced levels of petroleum-derived chemical feedstocks. Most waterborne paints contain spherical, emulsion polymer particles that serve as the film-forming binder phase. Our goal was to make emulsion polymer particles containing 30 percent feedstock that would function as effectively as commercial emulsions made from higher level feedstock. The processes developed yielded particles maintained their film formation capability and … more
Date: July 26, 2006
Creator: Smith, Kenneth F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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ALE3D Simulation of Heating and Violence in a Fast Cookoff Experiment with LX-10

Description: We performed a computational and experimental analysis of fast cookoff of LX-10 (94.7% HMX, 5.3% Viton A) confined in a 2 kbar steel tube with reinforced end caps. A Scaled-Thermal-Explosion-eXperiment (STEX) was completed in which three radiant heaters were used to heat the vessel until ignition, resulting in a moderately violent explosion after 20.4 minutes. Thermocouple measurements showed tube temperatures as high as 340 C at ignition and LX-10 surface temperatures as high as 279 C, which i… more
Date: June 26, 2006
Creator: McClelland, M. A.; Maienschein, J. L.; Howard, W. M.; Nichols, A. L.; deHaven, M. R. & Strand, O. T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Chemical Reaction Dynamics in Nanoscle Environments

Description: The major focus of the research in this program is the study of the behavior of molecular systems confined in nanoscale environments. The goal is to develop a theoretical framework for predicting how chemical reactions occur in nanoscale environments. To achieve this goal we have employed ab initio quantum chemistry, classical dynamics and quantum dynamics methods. Much of the research has focused on the behavior of molecules confined within single-walled carbon nanotubes (SWCNTs). We have also… more
Date: September 26, 2006
Creator: Goldfield, Evelyn M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

APPLICATION OF THE EMBEDDED FIBER OPTIC PROBE IN HIGH EXPLOSIVE DETONATION STUDIES: PBX-9502 AND LX-17

Description: The Embedded Fiber Optic probe directly measures detonation speed continuously in time, without the need to numerically differentiate data, and is a new tool for measuring time-dependent as well as steady detonation speed to high accuracy. It consists of a custom-design optical fiber probe embedded in high explosive. The explosive is detonated and a refractive index discontinuity is produced in the probe at the location of the detonation front by the compression of the detonation. Because this … more
Date: September 26, 2006
Creator: Hare, D; Goosman, D; Lorenz, K & Lee, E
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Human Vitamin B12 Absorption and Metabolism are Measured by Accelerator Mass Spectrometry Using Specifically Labeled 14C-Cobalamin

Description: There is need for an improved test of human ability to assimilate dietary vitamin B{sub 12}. Assaying and understanding absorption and uptake of B{sub 12} is important because defects can lead to hematological and neurological complications. Accelerator mass spectrometry (AMS) is uniquely suited for assessing absorption and kinetics of {sup 14}C-labeled substances after oral ingestion because it is more sensitive than decay counting and can measure levels of carbon-14 ({sup 14}C) in microliter … more
Date: January 26, 2006
Creator: Carkeet, C.; Dueker, S. R.; Lango, J.; Buchholz, B. A.; Miller, J. W.; Green, R. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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