scholarly journals Characterization of mock high-explosive powder

1979 ◽  
Author(s):  
C.R. Schmitt ◽  
G.F. Dorsey
Keyword(s):  
High Explosive

scholarly journals Characterization of detonation soot produced during steady and overdriven conditions for three high explosive formulations

2017 ◽  
Author(s):  
David W. Podlesak ◽  
Rachel C. Huber ◽  
Ronald S. Amato ◽  
Dana M. Dattelbaum ◽  
Millicent A. Firestone ◽  
...  
Keyword(s):  
High Explosive

scholarly journals Cloning, Sequencing, and Characterization of the Hexahydro-1,3,5-Trinitro-1,3,5-Triazine Degradation Gene Cluster from Rhodococcus rhodochrous

2002 ◽  
Vol 68 (10) ◽  
pp. 4764-4771 ◽  
Author(s):  
Helena M. B. Seth-Smith ◽  
Susan J. Rosser ◽  
Amrik Basran ◽  
Emma R. Travis ◽  
Eric R. Dabbs ◽  
...  
Keyword(s):  
Cytochrome P450 ◽  
Gene Cluster ◽  
High Explosive ◽  
Sole Source ◽  
Ring Cleavage ◽  
Rhodococcus Rhodochrous ◽  
Resting Cell ◽  
Dead End ◽  
Adrenodoxin Reductase

ABSTRACT Hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) is a high explosive which presents an environmental hazard as a major land and groundwater contaminant. Rhodococcus rhodochrous strain 11Y was isolated from explosive contaminated land and is capable of degrading RDX when provided as the sole source of nitrogen for growth. Products of RDX degradation in resting-cell incubations were analyzed and found to include nitrite, formaldehyde, and formate. No ammonium was excreted into the medium, and no dead-end metabolites were observed. The gene responsible for the degradation of RDX in strain 11Y is a constitutively expressed cytochrome P450-like gene, xplA, which is found in a gene cluster with an adrenodoxin reductase homologue, xplB. The cytochrome P450 also has a flavodoxin domain at the N terminus. This study is the first to present a gene which has been identified as being responsible for RDX biodegradation. The mechanism of action of XplA on RDX is thought to involve initial denitration followed by spontaneous ring cleavage and mineralization.

scholarly journals Estimating Physics Models and Quantifying Their Uncertainty Using Optimization With a Bayesian Objective Function

2019 ◽  
Vol 4 (1) ◽  
Author(s):  
Stephen A. Andrews ◽  
Andrew M. Fraser
Keyword(s):  
High Explosive ◽  
Random Noise ◽  
Posteriori Probability ◽  
Data Sets ◽  
A Posteriori ◽  
Probability Estimate ◽  
Quantitative Characterization ◽  
A Posteriori Probability ◽  
Wide Range

This paper reports a verification study for a method that fits functions to sets of data from several experiments simultaneously. The method finds a maximum a posteriori probability estimate of a function subject to constraints (e.g., convexity in the study), uncertainty about the estimate, and a quantitative characterization of how data from each experiment constrains that uncertainty. While this work focuses on a model of the equation of state (EOS) of gasses produced by detonating a high explosive, the method can be applied to a wide range of physics processes with either parametric or semiparametric models. As a verification exercise, a reference EOS is used and artificial experimental data sets are created using numerical integration of ordinary differential equations and pseudo-random noise. The method yields an estimate of the EOS that is close to the reference and identifies how each experiment most constrains the result.

Characterization of high explosive particles using cluster secondary ion mass spectrometry

2006 ◽  
Vol 20 (12) ◽  
pp. 1949-1953 ◽  
Author(s):  
Greg Gillen ◽  
Christine Mahoney ◽  
Scott Wight ◽  
Richard Lareau
Keyword(s):  
Mass Spectrometry ◽  
Secondary Ion Mass Spectrometry ◽  
High Explosive ◽  
Ion Mass Spectrometry ◽  
Secondary Ion

Electron Microscopy of Diamond Synthesized by Explosive Shock

1968 ◽  
Vol 26 ◽  
pp. 444-445
Author(s):  
Lucien F. Trueb
Keyword(s):  
Single Crystals ◽  
High Explosive ◽  
Average Width ◽  
Metal Mixtures ◽  
Flat Surfaces ◽  
Large Numbers ◽  
Diamond Single Crystals ◽  
New Type ◽  
Polycrystalline Aggregates

The microstructure of early shock-synthesized diamond was discussed in a previous report; this paper is concerned with the characterization of improved material which is now available from E. I. du Pont de Nemours & Company in various size ranges suitable for lapping and polishing.This new type of synthetic industrial diamond is produced by shocking dense graphite-metal mixtures at high explosive pressures. It consists of two types of particles which are shown in Figure 1; polycrystalline aggregates which are rounded and have a mottled surface, and single crystals or fragments thereof which have straight edges and flat surfaces. Figure 2 shows the two types of particles in transmission; they both partly consist of the hexagonal modification of diamond. Single crystals have either a cubic or a hexagonal habit and they often contain large numbers of stacking faults. Polycrystalline particles consist of densely aggregated bundles of acicular crystallites having an average width of 150 A and a length varying between 0.05 and 0.3 p.; a strong preferred orientation is invariably present (Figure 3).

scholarly journals Characterization of laser-induced plasmas as a complement to high-explosive large-scale detonations

AIP Advances ◽  
2017 ◽  
Vol 7 (9) ◽  
pp. 095208 ◽  
Author(s):  
Clare Kimblin ◽  
Rusty Trainham ◽  
Gene A. Capelle ◽  
Xianglei Mao ◽  
Richard E. Russo
Keyword(s):  
Large Scale ◽  
High Explosive

scholarly journals Characterization of high-explosive detonations using broadband infrared external cavity quantum cascade laser absorption spectroscopy

2019 ◽  
Vol 126 (9) ◽  
pp. 093102 ◽  
Author(s):  
Mark C. Phillips ◽  
Bruce E. Bernacki ◽  
Sivanandan S. Harilal ◽  
Brian E. Brumfield ◽  
Joel M. Schwallier ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Quantum Cascade Laser ◽  
High Explosive ◽  
External Cavity ◽  
Laser Absorption Spectroscopy ◽  
Quantum Cascade ◽  
Laser Absorption

Morphological Characterization of Mycobacteriophage R1

1974 ◽  
Vol 32 ◽  
pp. 254-255
Author(s):  
B. L. Soloff ◽  
T. A. Rado
Keyword(s):  
Carbon Source ◽  
Stationary Phase ◽  
Growth Phase ◽  
Minimal Medium ◽  
Morphological Characterization ◽  
Logarithmic Growth Phase ◽  
Complete Lysis ◽  
Lysogenic Culture ◽  
Logarithmic Growth

Mycobacteriophage R1 was originally isolated from a lysogenic culture of M. butyricum. The virus was propagated on a leucine-requiring derivative of M. smegmatis, 607 leu−, isolated by nitrosoguanidine mutagenesis of typestrain ATCC 607. Growth was accomplished in a minimal medium containing glycerol and glucose as carbon source and enriched by the addition of 80 μg/ ml L-leucine. Bacteria in early logarithmic growth phase were infected with virus at a multiplicity of 5, and incubated with aeration for 8 hours. The partially lysed suspension was diluted 1:10 in growth medium and incubated for a further 8 hours. This permitted stationary phase cells to re-enter logarithmic growth and resulted in complete lysis of the culture.

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