... Title : A Comparison of Isothermal Differential Scanning Calorimetry Accelerating Rate Calorimetry, and the Henkin Test in Thermal Hazards ...
DTIC Science & Technology
... Accession Number : ADP005388. Title : Hazard Analysis of Explosives by Accelerating Rate Calorimetry,. Corporate Author ...
... and S&T - Allows users to query the DoD laboratory community or ... Rate Calorimetry for the Characterization of Energetic Materials at MRC-Mound,. ...
Mar 1, 2011 ... Microcalorimetry is approximately 1000 times more sensitive than accelerating rate calorimetry (ARC) or differential scanning calorimetry ...
NASA Website
WSTF utilizes accelerating rate calorimetry (ARC) and differential ... when heat generated by a reaction is not removed fast enough. ... limits for fuels as a function of concentration, temperature, pressure, and partial pressures of ...
... accelerating rate calorimetry (ARC), ion chromatography (IC), inductively coupled plasma (ICP) spectrometry, thermogravimetric analysis (TGA) coupled to ...
This work aims at one important aspect of hazard analysis: compatibility testing of explosives with other materials. We discuss preliminary testing of the Accelerating Rate Calorimeter (ARC) for use in determining compatibility of a widely used military p...
National Technical Information Service (NTIS)
The role of exothermic reactions in battery test modes is discussed. The exothermic reactions are characterized with respect to their time-temperature and time-pressure behavior. Reactions occuring for any major exotherm were examined. The accelerating rate calorimetry methods was developed to study lithium cells susceptibility to ...
NASA Astrophysics Data System (ADS)
This report documents the results of applying thermal analysis methods to the characterization of the properties of Slurry Mix Evaporator (SME) product samples as a function of temperature. The goal of the research program was to determine if various thermal analysis methods could aid in measuring melter feed melt rate, study the impact of post SME additions of formic acid, ...
Energy Citations Database
... Title : COOLING GRADIENT CALORIMETRY, V. RELATIONSHIP BETWEEN CALORIMETER HEAT REMOVAL AND THE RATE OF HEAT LOSS ...
requirement ARBI adjusted running book inventory ARC accelerating rate calorimetry ARC Ames Research Center bomb ASC administrative safety control ASC Albuquerque Service Center (also NNSA Service Center) (NNSA, drawing no. prefix) AYS at your service B B bandwidth B- bomb (weapon designator) B-1 (NCSC software
E-print Network
The purpose of this study was to develop and validate an algorithm for estimating energy expenditure during the daily military routine on the basis of data collected using body-fixed sensors. First, 8 volunteers completed isolated physical activities according to an established protocol, and the resulting data were used to develop activity-class-specific multiple linear regressions for physical ...
PubMed
... Title : Using Dewar-Flask Calorimetry and Rectal Temperatures to Determine the Specific Absorption Rates of Small Rodents. ...
Accelerating rate calorimetry (ARC) has been used to define the thermal and pressure behavior of Li/SO2 cells during overdischarge as a function of cell balance and operating temperature. Lithium-limited cells are shown to be intrinsically safe while cells containing excess lithium at end of life have been shown to be capable of ...
It is apparent that the ever increasing rates and radiation levels found in high-energy physics are excluding more and more instrumental techniques. Those techniques that are remaining are often pushed to their theoretical limits. This situation reaches an extreme at the proposed luminosity of the SSC. Also, it is fair to say that at the SSC, after the ...
PNNL has demonstrated that cellulose effectively reduces the amount of molten ionic salt during Bulk Vitrification of simulated Hanford Low Level Waste (LLW). To address concerns about the potential reactivity of cellulose-LLW, PNNL used thermogravimetric analysis, differential thermal analysis, and accelerating rate calorimetry to ...
DOE Information Bridge
The aging kinetics of a composite of an Al-Zn-Mg-Cu powder (CW67) combined with a varied volume fraction of a particulate silicon carbide were investigated by means of differential scanning calorimetry (DSC), X-ray diffraction (XRD) and transmission electron microscopy (TEM). DSC revealed that the maximum rate of precipitation of the metastable ...
The influence of nanoconfinement on the free radical polymerization of methyl methacrylate is investigated. Nanoporous controlled pore glass (CPG) is used as a nanoconfining matrix for the polymerization. The reaction is followed by measuring heat flow as a function of reaction time during isothermal polymerization using differential scanning calorimetry (DSC). Preliminary ...
Nanoconfinement generally results not only in a Tg depression, but also in changes in reactivity. Recently, we showed that the polymerization reaction of bisphenol M dicyanate ester is enhanced in nanopores and that the Tg of the resulting polycyanurate product is depressed relative to the bulk. In order to examine the importance of an intracyclization side reaction, in this work we investigate ...
rate calorimetry to determine the reactivity of a material with a propellant. Immersion testing can be performed at specified use temperatures or the ...
... HEAT EXCHANGE DURING ENCAPSULATION ... Metabolic rate MY was easured during encapsulation by partitional calorimetry. ...
Kinetics of decomposition of 2-(5-Cyanotetrazolato) Pentaammine Cobalt (III) Perchlorate, CP, at constant pressure and constant volume were determined with isothermal and dynamic differential scanning calorimetry (DSC). The critical explosion temperature (T/sub c/ = 508K) for cylindrical CP pellets with radii of 0.238 cm was determined with accelerating ...
Calorimetry was used to study the kinetics of the irreversible reaction between hydrogen sulfide and sulfur dioxide in mixtures of N,N-dimethylaniline (DMA) and diethylene glycol monomethyl ether (DGM) and of DMA and triethylene glycol dimethyl ether (triglyne). The reaction was found to be first order in both H/sub 2/S and SO/sub 2/ in the presence of DMA. The approximate ...
The effect of nano-scale non-reactive anatase titanium dioxide (TiO2) on early age hydration of cement was experimentally studied. Isothermal calorimetry was performed on cement pastes with two different particle sizes of TiO2 at replacement levels of 5, 7.5 and 10%. The addition of TiO2 to cement increased the heat of hydration and accelerated the ...
This study found that 4 - 48 part per thousand (ppth) of Caustic Side Solvent Extraction (CSSX) solvent without extractant in caustic salt solution at evaporator-relevant temperatures result in no process-significant energetic events. However, the data suggest a chemical reaction (possible decomposition) in the CSSX solvent near 140 C. This concentration of entrained solvent is believed to ...
An extrusion line has been installed and successfully operated at FNAL (Fermi National Accelerator Laboratory) in collaboration with NICADD (Northern Illinois Center for Accelerator and Detector Development). This new Facility will serve to further develo...
To estimate the proficiency of inorganic pyrophosphatase as a catalyst, (31)P NMR was used to determine rate constants and thermodynamics of activation for the spontaneous hydrolysis of inorganic pyrophosphate (PP(i)) in the presence and absence of Mg(2+) at elevated temperatures. These values were compared with rate constants and activation parameters ...
The amorphous ? metastable and metastable ? stable crystalline phase transitions of nifedipine and their relationship with polymorph composition during storage at controlled temperature/humidity conditions were investigated. Metastable form C was produced from both differential scanning calorimetry (DSC) thermal treatment and storage [22 �C/0% and 75% relative humidity (RH)] ...
To evaluate cell safety in sonobuoy-type applications involving intermittent high-rate pulsed loads, the effect of partial discharge on the safety characteristics of stored Li/SO2 cells was investigated using an accelerating rate calorimeter (ARC) for hazard analyses. In addition, the effect of forced overdischarge at low temperature ...
Chronic acceleration effects on animals, considering growth rate, food intake, oxygen metabolism and
NASA Technical Reports Server (NTRS)
... Accession Number : AD0863519. Title : An Investigation of the Effects of Acceleration on the Burning Rates of Solid Propellants. ...
... Title : AN INVESTIGATION OF THE EFFECT OF ACCELERATION ON THE BURNING RATE OF COMPOSITE PROPELLANTS. ...
An extrusion line has been installed and successfully operated at FNAL (Fermi National Accelerator Laboratory) in collaboration with NICADD (Northern Illinois Center for Accelerator and Detector Development). This new Facility will serve to further develop and improve extruded plastic scintillator. Recently progress has been made in producing co-extruded ...
The thermal stability of Li-ion cells with intercalating carbon anodes and metal oxide cathodes was measured as a function of state of charge and temperature for two advanced cell chemistries. Cells of the 18650 design with Li{sub x}CoO{sub 2} cathodes (commercial SONY cells) and Li{sub x}Ni{sub 0.8}Co{sub 0.2}O{sub 2} cathodes were measured for thermal reactivity in the open circuit cell ...
The effects of nanoconfinement on the reaction kinetics and properties of a monocyanate ester and the resulting cyanurate trimer are studied using differential scanning calorimetry (DSC). On the basis of both dynamic heating scans and isothermal reaction studies, the reaction rate is found to increase with decreasing nanopore size without a change in ...
The chemistry and thermal behavior of Li/SO/sub 2/ cells have been investigated under conditions of discharge, storage and/or overdischarge. In situ spectroelectrochemical studies have been carried out on anode limited cells at room temperature and at -22/sup 0/C. Accelerating Rate Calorimetry has been used to study Li/SO/sub 2/ cells ...
Thermal property measurements of 18650 cells for the Space Shuttle Orbiter Advanced Hydraulic Power System (AHPS, formerly known as EAPU) have been performed. Cells were measured from three commercial manufacturers: E-One MOLI (12 cells), Panasonic (5 cells) and Sanyo (5 cells). Thermal property measurements of the MOLI 18650 cells included measurements of specific heat, self discharge ...
Effect of alpha-crystallin on thermal inactivation, denaturation and aggregation of aspartate aminotransferase from pig heart mitochondria (mAAT) has been in the focus of this study. Acceleration of heat-induced inactivation of mAAT was demonstrated in the presence of alpha-crystallin. According to the data of differential scanning calorimetry, ...
The rate law equation for reversible bimolecular reactions, which are describable by association and dissociation rate constants (k1 and k-1), is not solvable to a plain formula under stoichiometric reaction conditions. Therefore, it is a general technique to observe such reactions under pseudo first-order conditions, which make the reactions a ...
... calorimetry apparatus at a heating rate of 20 K/min show that zirconium additions of the order of 0.1 mass% slow down precipitation phenomena in ...
... The total body losses of heat via radiation and convection from the skin cannot be obtained from the sum of the weighted regional rates. ...
Binary and ternary electrolytes containing solvent mixtures of cyclic esters and cyclic ethers and lithium hexafluoroarsenate (LiAsF[sub 6]) as the electrolyte salt have been popular for some time for use in secondary lithium batteries because of their good conductivity and lithium cycling efficiency. The main concern regarding safety of lithium batteries is the initiation of self-heating when the ...
Differential scanning calorimetry (DSC) at high pressure was used to measure oxidation onset temperature and gum-forming tendency of shale derived diesel and jet fuels. Less than 1 mg of fuel was required for each test. For measuring oxidation onset temperature the scanning mode of the DSC instrument was used, with a heating rate of 40/sup 0/C per minute ...
Sediments held at constant temperature evolve heat at rates that can be measured by direct calorimetry. The heat production rates decrease with depth from the surface layer. Total heat flux is an indication of the rate of degradation of potential chemical energy originally fixed by photosynthesis and represents ...
Groundwater depletion rate accelerating worldwide. WASHINGTONIn recent decades, the rate at which humans worldwide are pumping dry the vast ...
The average burning rates of composite solid rocket propellant were measured in acceleration fields up to 2000 times the standard acceleration of gravity. The acceleration vector was perpendicular to and into the burning surface. Propellant strands were b...
The average burning rates of composite solid rocket propellants were measured in acceleration fields up to 2000 times the standard acceleration of gravity. The acceleration vector was perpendicular to and into the burning surface. Propellant strands were ...
We developed a new technique, Ice Box Calorimetry, for estimating heat discharge rates through steaming ground. Ice within an aluminum box provides a powerful tool for measuring the total heat transfer from the ground surface, including conductive heat, convective heat, and latent heat within vapor. Using this method, we are able to rapidly measure heat ...
... 34) fuel. Data specifically desired included startability and idle quality, acceleration rates, and fuel consumption. Also, a ...
... in high onset rate, high sustained +GZ ... SURVIVAL KITS, *LIFE SUPPORT SYSTEMS, ACCELERATION, ACCELERATION TOLERANCE ...
This paper shows that translational acceleration derivatives, such as pitching moment due to rate of
... The data that these evaluations would yield included startability and idle quality, acceleration rates, and fuel consumption. ...
... ACCELERATION, RESISTANCE, ENERGY, NUMERICAL ANALYSIS, CAVITIES, FREE ELECTRONS, ELECTRON ENERGY, PUMPING ...
... Descriptors : *BLOOD CIRCULATION, *BLOOD ANALYSIS, BRAIN, PULSE RATE, WOUNDS AND INJURIES, PATHOLOGY, ACCELERATED ...
... Descriptors : *CURING, *EPOXY COMPOUNDS, *EPOXY RESINS, SCANNING, METHYLAMINE, ACCELERATION, RATES, CYCLES, MIXTURES ...
... Wave Generation Via a Free Electron Laser. ... Wave Gain; Solenoid; Accelerator; Harmonic ... FREE ELECTRON LASERS, ACCELERATED TESTING ...
A student experiment on dynamic calorimetry is described. Dynamic calorimetry is a powerful technique for calorimetric studies, especially at high temperatures and pressures. A low-power incandescent lamp serves as the sample. The ScienceWorkshop data-acquisition system with DataStudio software from PASCO Scientific displays the results of the measurements ...
ERIC Educational Resources Information Center
A very high event rate Data Acquisition System is described. This DAS is planned for NA36, an SPS heavy ion experiment at CERN that uses calorimetry, wire chambers and a TPC to look for strangeness production enhancement as a signature of the quark-gluon ...
... individual was used only for one experiment. Calorimetry. Heat production rates of overwintering adults of C. lapponica were ... vials from the total weight. To determine the heat production rates, bee...
NBII National Biological Information Infrastructure
Guidelines are given for an interactive computer program that will analyze thermochemical decomposition rate data obtained by isothermal differential-scanning calorimetry. Data from any portion of the rate curve may be analyzed, and either normal or autoc...
One factor which has a significant effect on vehicle fuel consumption is the rate at which the vehicle is accelerated. Quantitative and qualitative studies have shown that more rapid and/or more frequent accelerations result in increased fuel consumption. The EPA has conducted a study to quantify the effects of operating a vehicle at ...
An investigation of the diffusional mobility of a bioactive compound (caffeine) within the high-solid (80.0% w/w) matrices of glucose syrup, and kappa-carrageenan plus glucose syrup exhibiting distinct mechanical glass-transition properties is reported. Experimental temperature range was from 20�C to -60�C and the techniques of modulated differential scanning calorimetry, ...
This work was conducted to define further the effects of propellant composition variables on the acceleration-induced burning rate augmentation of solid propellants. The rate augmentation at a given acceleration was found to be a nonlinear inverse functio...
