| Geochemical Characterization of Concentrated Gas Hydrate Deposits on the Hikurangi Margin, New Zealand: Preliminary Geochemical Cruise Report |
29 FEB 2008 |
44 pages |
| Authors:
Richard B. Coffin; LeiLa Hamdan; John Pohlman; Warren Wood; Ingo Pecher; Stuart Henrys; Jens Greinert; Kevin Faure; Andrew Gorman; Alan Orpin; NAVAL RESEARCH LAB WASHINGTON DC CHEMISTRY DIV
|
 | This report provides a preliminary summary of geochemical contribution to methane hydrate research and exploration on the Hikurangi Margin, off the northeastern coast of New Zealand from June 20 to July 3, 2006. Geochemical porewater profiles taken from shallow piston cores and vertical fluid migration measured with heatflow probing were compared with seismic summaries of potential deep sediment hydrates deposits. Research goals for this expedition include: (1) Refine geophysical, geochemical, ... |
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| Chemistry in Action: Space Shuttle Fuel Chemistry |
AUG 2005 |
32 pages |
| Authors:
Ghanshyam L. Vaghjiani; AIR FORCE RESEARCH LAB EDWARDS AFB CA SPACE AND MISSILE PROPULSION DIV
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| Developmental Toxicity of Drinking Water Disinfection By-Products to Embryos of the African Clawed Frog (Xenopus laevis) |
10 JUN 2005 |
8 pages |
| Authors:
L. M. Brennan; M. W. Toussaint; D. M. Kumsher; W. E. Dennis; A. B. Rosencrance; C. Brown; W. H. VAN DER Schalie; H. S. Gardner; GEO-CENTERS INC FREDERICK MD
|
| Water chlorination is a standard treatment for ensuring the safety of public drinking water. One drawback to this beneficial practice is the generation of drinking water disinfection by-products (DWDB), some of which have been implicated as causing adverse human health outcomes. In this article, we report the results of 96 hours of developmental toxicity tests with embryos of the South African clawed frog 'Xenopus laevis' used to evaluate four individual ... |
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| Studies of Electron-Ion Interactions Using the CRYRING Heavy-Ion Storage Ring Facility |
AUG 2002 |
12 pages |
| Authors:
Mats Larsson; STOCKHOLM UNIV (SWEDEN)
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| This report results from a contract tasking Stockholm University as follows: CRYRING, a synchrotron/heavy-ion storage ring facility, has proved to be a powerful tool for measurements of branching ratios in recombination of polyatomic molecular ions. However, there are important questions that still need to be addressed for organic ions such as: 1)Is there a mass limit at which fragmentation decreases or even vanishes and most or all of the electron ... |
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| An ab Initio Study of the Kinetics of the Reactions of Halomethanes withthe Hydroxyl Radical. Part 1: CH2Br2 |
06 APR 2000 |
25 pages |
| Authors:
Florent Lous; Robert E. Huie; Michael J. Kurylo; NATIONAL INST OF STANDARDS AND TECHNOLOGY GAITHERSBURG MD PHYSICAL AND CHEMICAL PROPERTIES DIV
|
| Ab initio calculations using the Molier-plesser perturbation theory were carried out on the H-atom abstraction reaction from dibromomethane by hydroxyl radical attack. Geometry optimization and vibrational frequency calculations at the MP2 level were performed on all reactants, products and the transition state with both the 6-311G(d,p) and 6-311G(2d,2p) basis sets. Utilizing the geometry parameters optimized at the MP2/6-311G(2d,2p) level of theory, single point energy ... |
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| Model Based Control of Combustion |
07 MAY 1999 |
64 pages |
| Authors:
Nicholas G. Osburn; NAVAL ACADEMY ANNAPOLIS MD
|
| This project investigates the use of mathematical modeling to design a closed-loop system for the control of combustion of a methane burner. Regulation of the air-to-fuel ratio for lean or rich combustion, depending on fuel efficiency or power requirements, is pivotal in applications such as internal combustion engines or fossil fuel power plants. Existing model-free approaches use means of limited capacity and require individual tuning ... |
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| Chemical Fire Suppressants: How Can We Replace Halon? |
1999 |
9 pages |
| Authors:
James W. Fleming; NAVY TECHNOLOGY CENTER FOR SAFETY AND SURVIVABILITY WASHINGTON DC
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| Halons, halogenated hydrocarbons containing bromine, appeared on the scene for fire suppression in the late 1940's following a U.S. Army study to identify effective agents. Halon 1301, bromotrifluoromethane, with its low boiling point is extremely effective in total flooding applications, which rely on the agent completely filling the space to be protected. Halons that exhibit good fire suppression properties but have boiling points closer to ... |
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| A Mechanistic Study of the Influence of Proton Transfer Processes on the Behavior of Thiol/Disulfide Redox Couples |
29 JUN 1998 |
25 pages |
| Authors:
Eiichi Shouji; Daniel A. Buttry; WYOMING UNIV LARAMIE DEPT OF CHEMISTRY
|
| The mechanism of the oxidation of 2-mercapto-5-methyl-1,3,4- thiadiazole (McMT) to its disulfide dimer (BMT) and its subsequent reduction has been examined with a combined approach employing experimental data and digital simulation. In order to elucidate the influence of proton transfers on these redox processes, special attention has been paid to the influence of various bases, including triethylamine, pyridine, 3-chloro-pyridine, lutidine and 2,6- di-tert-butyl- pyridine, and proton donors, including methanesulfonic acid ... |
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| Chemical Kinetics and Atmospheric Modification |
01 MAY 94 |
36 pages |
| Authors:
David L. McFadden; BOSTON COLL CHESTNUT HILL MA
|
| Electron attachment rate constants were obtained and negative ion product analysis was performed over the temperature between 300 and 1200 degrees range for a series of seventeen halomethane molecules that undergo dissociative electron attachment. The reactant molecules include CH3Cl, CH3Br,CH3I,CF3Cl, CF3Br,CF3I,CF2Cl2,CFC13,CC14,CF3H,CF2H2,CH3F,CF2HC1, CHFC12,CH2Br2,CC12H2, and CC13H. Positive activation energies were observed for most of the reactions. The results of molecular structure calculations for both the neutral and anionic species suggest that the ... |
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| Molecular Surface Electrostatic Potentials in the Analysis of Non- Hydrogen-Bonding Noncovalent Interactions |
27 DEC 93 |
16 pages |
| Authors:
Jane S. Murray; Kim Paulsen; Peter Politzer; NEW ORLEANS UNIV LA DEPT OF CHEMISTRY
|
| Electrostatic potentials computed on molecular surfaces are used to analyze some noncovalent interactions that are not in the category of hydrogen bonding, e.g. halogen bonding . The systems examined include halogenated methanes, substituted benzenes, s-tetrazine and 1,3-bisphenylurea. The data were obtained by ab initio SCF calculations. Electrostatic potentials, Non-hydrogen- bonding noncovalent interactions, Molecular surfaces |
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| Quantum Dynamics of Shock Waves in Molecular Crystals |
30 SEP 92 |
4 pages |
| Authors:
TEXAS UNIV AT AUSTIN
|
| Objective: This research has focused upon theoretical studies of shock wave transport in model molecular lattices via both classical and quantal techniques. In the previous grant period, the cluster model was developed and applied to model harmonic and cubic anharmonic molecular lattices. During this grant period, the cluster method has been extended to three more complex and physically significant situations. These are: (1) shock wave propagation in a linear chain ... |
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| Informal Conference on Photochemistry Held in Atlanta, Georgia on 26 April-1 May, 1992 |
01 MAY 92 |
|
| Authors:
Paul H. Wins; GEORGIA TECH RESEARCH CORP ATLANTA
|
 | The XXth Informal Conference on Photochemistry was held at the Colony Square Hotel in Atlanta, Georgia during the period April 26 - May 1, 1992. A total of 74 oral papers and 105 poster papers were presented. Most participants agreed that the scientific level of the conference was very high. One of the goals of this conference was to bring together leading researchers in a variety of basic and applied ... |
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| Synthesis and Properties of Rigid-Rod Benzobisazole Polymers Containing Benzothiazole Pendent Groups |
16 NOV 90 |
24 pages |
| Authors:
Tsu-Tzu Tsai; Fred E. Arnold; WRIGHT RESEARCH AND DEVELOPMENT CENTER WRIGHT-PATTERSON AFB OH
|
| Novel polybenzobisazoles containing benzothiazole pendents were prepared by the reaction of 2-benzothiazole or 2,5-dibenzothiazole terephthalic acids with the appropriate aminomercapto, aminohydroxy or tetraamino monomers in polyphosphoric acid at elevated temperatures. The polymerizations were carried out at concentrations (10-18%) which would promote anistropic reaction mixtures. Intrinsic viscosities in range of 4-19d1/g were measured in methanesulfonic acid at 30 C. Thermogravimetric-mass spectral analysis in vacuo showed that the pendent benzothiazole group was ... |
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| Recovery/Recharge and Recycle System for Bromochlorodifluoromethane (HALON 1211) |
03 NOV 90 |
60 pages |
| Authors:
Harold D. Beeson; Billy R. Dees; Jimmy D. Watson; Thomas J. Stepetic; NEW MEXICO ENGINEERING RESEARCH INST ALBUQUERQUE
|
| The Air Force has an extensive inventory of Halon fire extinguishers, all of which require service and maintenance. When these operations are performed, halon is vented to the atmosphere, resulting in an estimated loss of up to 250,000 pounds of halon per year at a value approaching $500,000. Additionally, these emissions have a significant impact on stratospheric ozone. This project developed a recharge/recovery system for Halon 1211 to move the ... |
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| Molecular Composites Processing and Properties I |
JAN 88 |
|
| Authors:
Charles C. Lee; T. E. Helminiak; H. Chuah; DAYTON UNIV OH RESEARCH INST
|
| This report identifies a new approach to process thick molecular composites by non-melt consolidation. The process involves the coagulation of the PBT/Nylon 66 dope from methane sulfonic acid into a block of required dimensions using a specially designed mold. The coagulant diffused into the mold through a porous stainless steel plate while a constant pressure is applied to contain the volume changes during coagulation, thus giving a void-free coagulated block. ... |
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| Dredging of Polluted Sediment in the First Petroleum Harbor, Rotterdam, |
MAR 1987 |
|
| Authors:
Kees D'Angremond; Andries J. De Jong; Cornelis P. De Waard; VOLKER STEVIN BAGGERMAATSCHAPPIJ NEDERLAND BV ROTTERDAM
|
| Papers previously published by the Municipality of Rotterdam on the removal of polluted bottom sediments from the First Petroleum Harbor explain that after long consideration it was decided that polluted material would be buried in deep pits in the bottom of the same harbor. Actual dredging operations in the First Petroleum Harbor have to fulfill some very strict requirements. First, the sediment has to be dredged, transported, and dumped with ... |
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| Chemical Kinetics of Nitramine Propellants |
NOV 86 |
|
| Authors:
Melvyn Branch; COLORADO UNIV AT BOULDER DEPT OF MECHANICAL ENGINEERING
|
| This paper describes experimental measurements of the structure of a lean, premixed, laminar, flat flame of methane/nitrogen oxide/oxygen. The composition of stable species in the flame was measured by a cooled quartz sampling microprobe and gas chromatographic analysis. The composition of the intermediates CN, Ch, NH and NH2 was measured by laser-induced fluorescence spectroscopy using an excimer laser pumped tunable dye laser system. The flame has two luminous zones, one ... |
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| A Facile, High Yield Synthesis of 2,3-Diphenyl-1,3-Butadiene. |
20 OCT 1986 |
|
| Authors:
James H. Bentley; DEPARTMENT OF THE ARMY WASHINGTON DC
|
| A high yield. four step synthesis process is disclosed for producing the monomer, 2,3-diphenyl-1,3-butadiene, wherein in step 1 acetophone pinacol is produced from the dimerization of acetophenone in 96% yield; in step 2 acetophenone pinacol is reacted with triethoxymethane and benzoic acid to produce 2,3-diphenyl-2-butene in about 88-96% yield. The 2,3-diphenyl-2-butene and N-bromosuccinimide (NBS) are reacted together in step 3 in an ultra violet reactor and in a CCL4 reaction ... |
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| Synthesis and Characterization of New Low-Dimensional Metal Complex Conductors |
01 OCT 86 |
|
| Authors:
William E. Hatfield; NORTH CAROLINA UNIV AT CHAPEL HILL DEPT OF CHEMISTRY
|
| This research program was devoted to the synthesis and characterization of new transition metal compounds which had the potential of high electrical conductivities. Since band formation and electrical conductivity is enhanced by strong intermolecular interactions fully and partially oxidized metallomacrocyclic complexes were synthesized and characterized. Electrochemical methods were developed for crystal growth to overcome solubility problems which led to mixed phase products in earlier studies. These principles were extended to ... |
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| Hydrocarbon Group-Type Analyzer System. |
09 SEP 1986 |
|
| Authors:
Paul C. Hayes; DEPARTMENT OF THE AIR FORCE WASHINGTON DC
|
| One aspect of this invention relates to the high performance liquid chromatographic separation of a liquid hydrocarbon mixture into three components, namely saturates, alkyl benzenes and polynuclear aromatics. In another aspect this invention relates to the high performance liquid chromatographic separation of a liquid hydrocarbon mixture into three components, namely saturates, olefins, and total aromatics. |
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| Electrochemistry in Liquid Crystals: Orientational Effects in Electrochemical Processes |
11 FEB 86 |
|
| Authors:
Angela M. Serra; Robert D. Mariani; Hector D. Abruna; CORNELL UNIV ITHACA NY DEPT OF CHEMISTRY
|
| The electrochemical characterization of the room temperature nematic phases MBBA (p-methoxybenzilidene p-butyl aniline), MBAB (methoxy-butyl azoxybenzene) and K-15 (4-pentyl-4' cyano-biphenyl) has been performed in acetonitrile as well as in the neat phases and it is found that they all possess a wide range of potenitals over which electrochemical experiments can be carried out. MBBA and MBAB exhibit large ohmic drops making experimentation difficult. K-15, on the other hand, proved to ... |
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| Metabolism of Inhaled Dihalomethanes in Vivo: Differentiation of Kinetic Constants for Two Independent Pathways |
86 |
|
| Authors:
Michael L. Gargas; Harvey J. Clewell III; Melvin E. Andersen; HARRY G ARMSTRONG AEROSPACE MEDICAL RESEARCH LAB WRIGHT- PATTERSON AFB OH
|
| Dihalomethanes are metabolized by two major pathways: an oxidative, cytochrome P-450-mediated pathway that has been previously thought to yield only CO, and a glutathione (GSH)-dependent one that yields CO2. Both give 2 mol of halide ion. We studied the kinetic properties of the two pathways in vivo by exposing male rats to various inhaled concentrations of CH2Cl2,CH2F2,CH2FCl, CH2BrCl, and CH2Br2 and determining end-exposure carboxyhemoglobin (HbCO) and plasma bromide (where appropriate). ... |
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| Part A. Molecular Dynamics and Ionic Associations of LiAsF6 in 4- Butyrolactone Mixtures with 2-Methyl Tetrahydrofuran. Part B. Molecular Dynamics and Ionic Associations of LiBF4 in 1,2-Dimethoxymethane |
30 JUN 85 |
|
| Authors:
Y. Harada; M. Salomon; S. Petrucci; M. Delsignore; H. Farber; POLYTECHNIC INST OF NEW YORK FARMINGDALE
|
| Solutions of LiAsF6 at 298.2 K were studied by audiofrequency conductance in the concentrations range .0001-.01 Mol/Cu dm and by radiofrequency ultrasonic absorption in the concentration range 0.05 - 0.5 mol/ cu dm. The solvents employed were mixtures of 4-butyrolactone with 2-methyl tetrahydrofuran varying in compositions from mole fractions X subscript BL = 0. 10 X subscript BL = 0.75. In dilute solutions the audiofrequency conductivity data yield ion association ... |
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| Percutaneous Absorption of Chemical Vapors |
MAY 1985 |
10 pages |
| Authors:
James N. McDougal; Gary W. Jepson; Harvey J. Clewell III; Melvin E. Andersen; AIR FORCE AEROSPACE MEDICAL RESEARCH LAB WRIGHT-PATTERSON AFB OH
|
| Some military and industrial chemical vapor exposure situations require determination of the hazard involved in skin exposures even when respiratory protection is provided. Hydrazine fuels have been identified as suspect carcinogens, and human exposure limits have been set at very low levels. Protection from hydrazine vapor inhalation and liquid hydrazine contact is essential to the long term health of military and civilian workers. Rates of penetration of hydrazine vapor through ... |
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| Some Addition and Complexation Reactions of a Silylated Amino(Methylene) Phosphine |
12 DEC 1984 |
|
| Authors:
R. R. Ford; B. L. Li; R. H. Neilson; R. J. Thoma; TEXAS CHRISTIAN UNIV FORT WORTH DEPT OF CHEMISTRY
|
| The chemistry of phosphorus compounds containing Si-N-P and/or Si-C-P linkages is usually quite different from that of the nonsilylated analogues. On the one hand, the steric bulk and Pi acceptor properties of silyl groups can be used to kinetically stabilize a variety of low-coordinate phosphorus systems. Alternatively, the Si-N or Si-C bonds may serve as reactive sites so that processes such as intramolecular silyl group rearrangements and condensation reactions due ... |
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| Electrochemistry of Polymer Films. Applications to Chemical Analysis and Energy Conversion |
17 OCT 1984 |
|
| Authors:
J. Q. Chambers; TENNESSEE UNIV KNOXVILLE
|
| Electroactive polymers containing the widely studied electron acceptor, tetracyanoquinodimethane or TCNQ, in the polymer backbone have been synthesized. The charge transport processes through thin films of these TCNQ polymers and related materials have been thoroughly studied leading to new insight at the molecular level. Chemical reactions coupled to the electron hopping steps can profoundly influence the rate of charge transport in fixed site polymer films. Methodology and techniques have been ... |
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| Database Assessment of the Health and Environmental Effects of Munition Production Waste Products |
AUG 1984 |
218 pages |
| Authors:
M. G. Ryon; B. C. Pal; S. S. Talmage; R. H. Ross; OAK RIDGE NATIONAL LAB TN
|
| A database on the health and environmental aspects of munition production waste products is presented. Information on production processes and waste treatement methods is also presented. |
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| Exciplex Ionic Dissociation in Non-Polar Solvent Induced by Multipolar Salt Complexes |
26 APR 1984 |
|
| Authors:
B. E. Goodson; G. B. Schuster; ILLINOIS UNIV AT URBANA DEPT OF CHEMISTRY
|
| The exciplex formed from pyrene and 1,4-dicyanobenzene in dimethoxy- ethane solution is quenched by tetra-n-butylammonium tetrafluoroborate. Stern- Volmer analysis reveals that the salt is a more effective quencher at low concentrations than at high concentrations. Related non-linear effects are observed when the yield of radical ions formed by reaction of the salt with the exciplex is determ ined by laser transient absorption spectroscopy. Very little pyrene radical cation is formed ... |
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| Synthesis of a Series of Acetylene Terminated Oligomers: Structure Property Relationships |
MAR 1984 |
|
| Authors:
J. J. Kane; WRIGHT STATE UNIV DAYTON OHIO DEPT OF CHEMISTRY
|
| Key intermediates for the synthesis of a series of four bisacetylene aryl ether sulfones have been synthesized. The intermediates are the oligomeric bis-phenols resulting from nucleophilic aromatic substitution of 4,4'- dichlorodiphenyl sulfone with an excess of the salts of each of the following bis-phenols: 2,2-di-(4-hydroxyphenyl)perfluoropropane (IV), 4,4'- dihydroxybenzophenone (V), 4,4'-dihydroxydiphenyl ether (VI), and 4,4- dihydroxydiphenyl methane (VII). Two of the resulting oligomeric bis-phenols (those arising from IV and VI were ... |
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| Low Cost Acetylene Terminated Polymers |
FEB 1984 |
|
| Authors:
J. F. Prescott; S. P. Lee; R. Ippolito; CANADIAN COMMERCIAL CORP OTTAWA (ONTARIO)
|
| A three step procedure for the synthesis of acetylene terminated polymers was studied. The meta- and para- ATB systems, made from Bis Phenol A, were used to develop a process which would be amenable to large scale production. Several changes in the work-up of the reactions were made to reduce the use of carcinogenic solvents and to eliminate costly and unwieldy chromatography columns. The use of toluene as a solvent ... |
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| Landfill Gas Control at Military Installations |
JAN 1984 |
|
| Authors:
R. A. Shafer; A. Renta-Babb; J. T. Bandy; E. D. Smith; P. Malone; CONSTRUCTION ENGINEERING RESEARCH LAB (ARMY) CHAMPAIGN IL
|
| This report provides information useful to Army personnel responsible for recognizing and solving potential problems from gas generated by landfills. Information is provided on recognizing and gauging the magnitude of landfill gas problems; selecting appropriate gas control strategies, procedures, and equipment; use of computer modeling to predict gas production and migration and the success of gas control devices; and safety considerations. (Author) |
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| Research in Energetic Compounds |
JAN 1984 |
42 pages |
| Authors:
T. G. Archibald; K. Baum; FLUOROCHEM INC AZUSA CA
|
| The synthesis of 1,3,3-trinitroazetidine was carried out by means of the reaction of 1-t-butyl-3-methanesulfonatoazetidine with sodium nitrite to give 1-t-butyl-3-nitroazetidine. Oxidative nitration gave 1-t-butyl-3,3- dinitroazetidine, and nitrolysis with acetyl nitrate gave 1,3,3- trinitroazetidine. Other routes were explored. 1-Benzhydryl-3,3-dinitroazetidine was obtained by nitrite displacement of 1-benzhy-dryl-3- methanesulfonatoazetidine, followed by oxidative nitration, but attempts to replace the benzhydryl group by nitrolysis, hydrogenation or bromination were unsuccessful. Nitration of 1-t-butyl-3-hydroxyazetidine, 3- methanesulfonatoazetidine, 3-carboxyazetidine ... |
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| N-Bromodifluoromethanimine |
1984 |
|
| Authors:
B. A. O'Brien; J. S. Thrasher; C. W. Bauknight Jr.; M. L. Robin; D. D. DesMarteau; CLEMSON UNIV SC DEPT OF CHEMISTRY
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| Oxidative-Addition Processes in the Reactions of (OC)4Fe(-). with XCY3 Molecules |
1984 |
|
| Authors:
R. N. McDonald; P. L. Schell; W. D. McGhee; KANSAS STATE UNIV MANHATTAN DEPT OF CHEMISTRY
|
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| Spectroelectrochemistry of Tetracyanoquinodimethane Modified Electrodes |
1984 |
|
| Authors:
G. Inzelt; R. W. Day; J. F. Kinstle; J. Q. Chambers; TENNESSEE UNIV KNOXVILLE DEPT OF CHEMISTRY
|
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| Properties of Three Dimensional Energetic Solids and Molecular Crystals |
01 JUN 1983 |
|
| Authors:
A. Barry Kunz; MICHIGAN TECHNOLOGICAL UNIV HOUGHTON
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| The effect of exciton formation upon combustion of solid fuels is examined by applying ab initio theory to solid methane and nitric oxide. (Author) |
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| Polycyclic High Energy Oxidizers |
APR 1983 |
|
| Authors:
J. C. Hinshaw; MORTON THIOKOL INC BRIGHAM CITY UT WASATCH DIV
|
| Efforts toward the synthesis of polycyclic high density, high energy oxidizers have involved examination of synthetic paths to the hexaazaadamantane framework. Routes examined include condensation of amides with an orthoformate, reaction of tris(acylamino) methanes with orthoformate and cylizations based on acylated perhydrotriazines. The cyclization chemistry of a pentaazabicyclononadiene is also under investigation. (Author) |
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| Fuel Sediment Analysis by ESCA |
25 FEB 1983 |
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| Authors:
Margaret Wechter; Robert N. Hazlett; NAVAL RESEARCH LAB WASHINGTON DC
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| The technique of x-ray photoelectron spectroscopy (XPS, ESCA) was applied to the analysis of sediments which are formed in fuel and which degrade fuel storage stability. Samples studied included sediments formed in a Navy Paraho Shale II DFM fuel by doping fuel samples with 2,5-dimethylpyrrole and stressing the mixtures for periods of 4 to 28 days at 80 C. Several naturally occurring sediments were also investigated. Carbon, oxygen, nitrogen, and ... |
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| Flexible Semiconductive Polymers. |
16 NOV 1982 |
|
| Authors:
Oh-Kil Kim; Robert B. Fox; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| An electrically conductive polymeric composition is fabricated by dispersing polymeric ether complexes of TCNQ salts within a flexible, thermoplastic polymer matrix. The compositions form flexible, homogeneous, films which exhibit substantially superior properties over currently available TCNQ salt based systems. |
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| The Displacement of Water from a Steel Surface |
08 NOV 1982 |
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| Authors:
Charles R. Hegedus; NAVAL AIR DEVELOPMENT CENTER WARMINSTER PA AIRCRAFT AND CREW SYSTEMS TECHNOLOGY DIRECTORATE
|
| A quantitative test to evaluate liquid compounds for their ability to displace water droplets from a steel surface has been developed and a study of the water displacement mechanism has been made. The test method consists of placing water droplets onto an inclined steel surface, followed by the application of a test agent. The agent flows down the surface, contacting the water drops. The water may either remain on the ... |
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| Gas-Solid Chromatography Studies Using Activated Charcoals Treated With 4-Vinylpyridine |
OCT 1982 |
25 pages |
| Authors:
Gerhard Magin; Edward J. Poziomek; James A. Baker; William S. Magee Jr; ARMY ARMAMENT RESEARCH AND DEVELOPMENT COMMAND ABERDEEN PROVING GROUND MD CHEMICAL SYSTEMS LAB
|
| The present paper reports the performance of a series of 4- vinylpyridine-impregnated charcoals as gas-solid chromatograph columns in the retention of water, a series of alcohols (methanol, ethanol, n-propanol, iso- propanol, n-butanol, tert-butanol), and several hydrocarbons (methane, ethane, propane, cyclopropane). The 4-vinylpyridine loading ranged up to 30% by weight. The activated charcoal was a coal-based one with a surface area of about 1000 sq m/gm. The use of activated charcoal ... |
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| Thermochemical Energy Transport Process. |
07 SEP 1982 |
|
| Authors:
Talbot A. Chubb; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| The CO2-CH4 reforming-methanation chemical cycle provides and attractive means of transporting energy, such as solar energy, from the place of generation to the place of use. CO2/CH4 molar ratios of 2.0-7.0 permit the use of low-temperature pipelines, while lowering the carbon removal temperature of the system. Catalyst specificity is required to provide high methanation reaction temperature without carbon deposition. (Author) |
|
| Submillimeter Wave Frequency Shifter. |
30 AUG 1982 |
|
| Authors:
George A. Tanton; Harry C. Meyer; James F. Osmundsen; DEPARTMENT OF THE ARMY WASHINGTON DC
|
| Laser radiation whose wavelength is in the submillimeter wave spectral region is sent through an intercavity dielectric tube positioned inside a coil. The tube contains a gas having large dipole moments and which may be of the same kind as the input beams lasing gas. In response to current there through the coil produces an axial magnetic field. The direction of the magnetic field is parallel to the propagation of ... |
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| Synthesis and Properties of Model Aromatic Polyimide Systems |
AUG 1982 |
26 pages |
| Authors:
B. A. Reinhardt; F. E. Arnold; AIR FORCE WRIGHT AERONAUTICAL LABS WRIGHT-PATTERSON AFB OH
|
| In an effort to investigate the hydrolytic stability of completely aromatic polymides a series of model polymeric imide structures have been synthesized. The materials consist of oligomeric thermoset systems and high molecular polymers. Equivalent backbone structures were synthesized differing only in respect to the size of the imide ring. It is anticipated that the utilization of the model systems prepared will establish the hydrolytic stability of aromatic polyimides. (Author) ... |
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| Time Scale and Product Energy for the IRMPD of CF2HC1 at Steady State |
09 JUN 1982 |
|
| Authors:
John C. Stephenson; NATIONAL BUREAU OF STANDARDS WASHINGTON DC MOLECULAR SPECTROSCOPY DIV
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|
| Lithium Cycling in Polymethoxymethane Solvents |
JUN 1982 |
|
| Authors:
J. S. Foos; J. McVeigh; EIC LABS INC NEWTON MA
|
| Solutions of LiAsF6 in dimethoxymethane (DMM) and trimethoxymethane (TMM) are shown to be conductive and capable of cycling Li in high efficiency in half-cells. Inspection of electrolytes stored at 70 C in the presence and absence of Li indicated that TMM is more stable than DMM. However, DMM cycles Li much better than TMM after storage. |
|
| Thermal Decomposition of Dimethoxymethane Electrolyte Solution |
JUN 1982 |
|
| Authors:
J. S. Foos; V. Meltz; EIC LABS INC NEWTON MA
|
| The electrolyte solution prepared from LiAsF6 and dimethoxymethane (DMM) has been investigated for use in secondary lithium batteries. Storage tests were conducted at 70 C. In the presence of Li the best samples of electrolyte were stable to Li for more than one month. In the absence of Li, the electrolyte solution decomposed within days with loss of DMM, and formation of methyl formate and dimethyl ether in a 1:2 ... |
|
| Polycyclic High Energy Oxidizers |
MAR 1982 |
|
| Authors:
J. C. Hinshaw; THIOKOL CORP BRIGHAM CITY UT WASATCH DIV
|
| Efforts toward the synthesis of polycyclic high density, high energy oxidizers have involved examination of synthetic paths to the hexaazaadamantane framework. Routes examined include condensation of amides with an orthoformate, reaction of tris(acylamino) methanes with orthoformate and cyclizations based on acylated perhydrotriazines. The cyclization chemistry of a pentaazabicyclononadiene is also under investigation. Several routes to tetranitrazabicyclooctane ('bicyclic HMX') have also been examined including modification of the preformed tetraazabicyclooctane ring system ... |
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| Ideal Gas Thermodynamic Properties of CH3, CD3, CD4, C2D2, C2D4, C2D6, C2H6, CH3N2CH3, and CD3N2CD3, |
1982 |
|
| Authors:
K. M. Pamidimukkala; D. Rogers; G. B. Skinner; NATIONAL STANDARD REFERENCE DATA SYSTEM
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| Ideal gas thermodynamic properties for CH3, CD3, CD4, C2D2, C2D4, C2D6, C2H6, CH3N2CH3 and CD3N2CD3 in the temperature range 0 - 3000 K and at 1 atmosphere have calculated by statistical thermodynamic methods employing spectroscopic and other molecular constants. The rigid rotor-harmonic oscillator model has been used. Estimated uncertainties in the thermodynamic properties due to uncertainties in the molecular properties and estimates of the effects of vibrational anharmonicities are also ... |
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| Detection of Nascent NO in a Methane/Air Flame by Multiphoton Ionization |
09 DEC 1981 |
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| Authors:
Bennett H. Rockney; Terrill A. Cool; Edward R. Grant; CORNELL UNIV ITHACA NY
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Reports by Keyword(s)
METHANES
