Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 40 for “"RDX"”.
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Biodegradation of RDX in Rhodococcus spp.
… (Royal Demolition Explosive - RDX) is one of the most widely used explosives. RDX is a man-made compound, recalcitrant to degradation and proven to be toxic to organisms. Bacteria capable of utilising RDX as a sole nitrogen source for growth have been isolated from RDX polluted …
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Production of nanocrystalline rdx by ress : development and material characterization
… initiation. An improved form of the explosive RDX with a significantly reduced sensitivity to stimuli including shock and impact was sought. The direction of this research was to investigate the effect of RDX crystal size reduction down to nano-scale dimensions on the sensitivity …
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Experimental analysis and modeling of transient dissolution of RDX through mass transfer processes
… of hexahydro-1, 3,5-trinitro-1, 3,5-triazine (RDX) in Composition B. Composition B, also referred to as CompB. CompB is made up of three parts: 54% RDX, 6% HMX and 40% TNT. A numerical simulation was employed to model the overall solute transport equation. The solute transport equation takes …
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Materials far from equilibrium : shock-induced deformation and chemistry in RDX and experimental development
… 1,3,5-triaza-1,3,5-trinitrocyclohexane (RDX), using new multiobservables techniques and algorithms developed here and elsewhere. RDX has many known crystal phases and decomposition mechanisms, but how shock waves induce decomposition remains poorly understood. With in-situ single-shot …
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IMPACTS OF RDX SOIL CONTAMINATION ACROSS AN AGE GRADIENT FOR THE NATIVE SHRUB MORELLA CERIFERA.
… to 1,3,5-trinitroperhydro-1,35-triazine (RDX) soil contamination across three life stages and I hypothesized that RDX would have the greatest impact on seed germination. Morella cerifera seeds were germinated on soils amended with RDX up to 1500 mg RDX kg-1 dry soil. Juvenile and adult …
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Induction of growth and pigmentation changes by hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) in angiosperms
… of Hexahydro- 1,3,5-trinitro-1,3,5-triazine (RDX). Plants were grown in RDX soil treatments of 100, 500, and 1000 mg per kg for 60 days. Tolerance of RDX, expressed as a mean percentage of control dry mass, was greatest for Amaranthus retroflexus L. (pigweed) (110%-166%), Ipomoea jaegeri Pilg …
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Formation of RDX nanoparticles by rapid expansion of supercritical solution : in situ characterization by laser scattering
Cyclo-1,3,5-trimethylene-2,4,6-trinitramine (RDX), a well-known energetic material, is highly explosive. Reduction of the sensitivity of RDX is desired for safe handling and storage in military applications. Data on the sensitivity of RDX in the 10-1000 um crystal size range suggested that the …
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Extracellular Electron Shuttle Mediated Biodegradation of Hexahydro-1,3,5-trinitro-1,3,5-triazine
… for hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX), as well as alternate explosive contaminants. The potential use of extracellular electron shuttling compounds to mediate electron transfer between iron (hydr)oxides and Fe(III)-reducing microorganisms was investigated for decontaminating RDX. …
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Production and characterization of composite nano/micro sized particles by rapid expansion of supercritical solutions (ress) co-precipitation
… of hexahydro-1, 3, 5-trinitro-1, 3, 5-triazine (RDX) and polymer binders were produced by co-precipitation using rapid expansion of supercritical solutions (RESS). The binders used in this study are poly (vinylidene fluoride-co-hexafluoropropylene) (VDF-HFP22), polystyrene (PS) and …
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Extracellular Electron Shuttle Mediated Biodegradation of Hexahydro-1,3,5-Trinitro-1,3,5-Triazine
… for hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX), as well as alternate explosive contaminants. The potential use of extracellular electron shuttling compounds to mediate electron transfer between iron (hydr)oxides and Fe(III)-reducing microorganisms was investigated for decontaminating RDX. …
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Electrochemical techniques for detection of Tnt and other explosives using disposable screen-printed carbon electrodes
… and Hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX). The square wave voltammetric (SWV) scan technique can be used to measure TNT and RDX in as little as 50 muL sample volumes applied to the electrode surface within minutes. The detection limit of this electrochemical assay can also be …
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Design and synthesis of organic chromophores for imaging, lithography and organic electronics
… a hydride ion equivalent to the high explosives RDX and PETN upon irradiation at 313 nm in degassed acetonitrile solutions. Mechanistic photophysical studies indicated that the photoreduction of RDX proceeded via a two-step electron-hydrogen atom transfer reaction, whereas PETN photoreduction …
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An explosive vapor generator based on capillary gas chromatography
… and 1,3,5-trinitro-1,3,5- triazacyclohexane (RDX). The chemical composition of the output was confirmed by both ion mobility spectrometry, and quadrupole mass spectrometry. Adsorptive effects of TNT and RDX were studied in order to optimize the injection parameters, achieving detection limits …
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Two-Dimensional Modeling of AP/HTPB Utilizing a Vorticity Formulation and One-Dimensional Modeling of AP and ADN
… previously applied to combustion models of HMX, RDX, GAP, GAP/RDX, GAP/HMX, NG, BTTN, TMETN, GAP/BTTN, and GAP/RDX/BTTN. The universal kinetic mechanism has been expanded to include chlorine reactions, thus allowing the numerical modeling of AP. This is seen as a further step in developing a …
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Multispectral optical depth measurements in post-detonation high explosive fireballs
… high explosives. PETN, HMX-based PBXN-5, RDX, an 80% RDX/20% aluminum mixture, and PETN-based Primasheet 1000 explosives were detonated in a 2.18L explosive test chamber. Charges were 125mg or 250mg explosive output pellets, each detonated by an 80mg low density PETN initiating charge. The …
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Near-infrared emission spectroscopy of explosive breakout
… high explosives. Explosives tested include RDX, Composition B, HMX, and PETN, along with RP1 and RP80 detonators in air and nitrogen environments. The first 20 microseconds after detonation were examined using a combination of a rotating filter disk and shutter to gate the exposure after the …
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Materials in extreme conditions : experimental developments and studies of systems far from equilibrium
… 1,3,5-triaza-1,3,5-trinitrocyclohexane (RDX), has been used for almost a century, questions remain about its initiation, reactivity, and interaction with shock waves. Very little work has directly addressed the coupling between mechanical deformation and chemistry in this system. Further, …
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Examination of the small scale slow cookoff behavior of a cast modified double base propellant
… sealed blast chamber and was compared to HMX and RDX detonations. Morphological behavior was examined using X-ray computed tomography to provide qualitative information on void formation due to gradual heating.
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