Stability and performance

PEP-3. One of the US plastic high expls developed during WWII, consisting of PETN 86 and Gulf Crown E Oil 14%. Its sensitivity, stability and performance properties are detailed below ... 

The performance should be evaluated in terms of drug and component physical and chemical compatibilities. Particle size and emitted dose determinations are required. Through-life performance should be evaluated as this is a multidosing reservoir system. The influence of temperature and humidity on stability and performance of the product should also be considered. 

Understanding the condensed-phase properties of HE materials is important for determining stability and performance. Information regarding HE material properties [such as the physical, chemical, and mechanical behaviors of the constituents in plastic-bonded explosive (PBX) formulations] is necessary for efficiently building the next generation of explosives as the quest for more powerful energetic materials (in terms of energy per volume) moves forward.1... 

Stability and Performance of Bound En me. The stability of the IME was determined by two methods. One measurement of bound activity was obtained using traditional cellulose hydrolysis experiments (described below). In the other method, direct kinetic parameter measurements were obtained using a recirculating differential (RDR) reactor system following the method of Ford et al. (46). 

In view of this, a robust scheme based on the Hoo control theory [24] is developed in the present work. The algorithm guarantees both stability and performance for a family of perturbed plants with model uncertainties and exogenous inputs (i.e., chamber disturbances and sensor noises) over a wide range of operating conditions, an advantage especially desired for combustion dynamics problems. 

Johnson, R.A., and Mullay, J.J. (1992) Stability and performance characterization of NENA materials and formulations. Joint Inti Symposium on Energetic Materials Technology, New Orleans, Louisiana, U.S.A., Oct. 05-07, 1992, pp. 116-121. 

The parietal lobes are responsible for integrating the sensory input from touch, taste, smell, etc. The complex organization of this section of the brain allows us to recognize patterns in our experience, maintain physical orientation and stability, and perform more intricate intellectual tasks such as math and chemistry. 

The various preparation processes and technologies used in drug product manufacture also can effect product safely, stability, and performance, e.g., compression during tablet manufacture. The principal processes used in dosage form manufacture arc as follows. 

An excess of phosgene is used during the initial reaction of amine and phosgene to retard the formation of substituted ureas. Ureas are undesirable because they serve as a source for secondary product formation which adversely affects isocyanate stability and performance. By-products, such as biurets (23) and triurets (24), are formed via the reaction of the labile hydrogens of the urea with excess isocyanate. Isocyanurates (25, R = phenyl, toluyl) may subsequendy be formed from the urea oligomers via ring closure. 

Its sensitivity, stability and performance properties are detailed below ... 

The stability of foams in constraining media, such as porous media, is much more complicated. Some combination of surface elasticity, surface viscosity and disjoining pressure is still needed, but the specific requirements for an effective foam in porous media remain elusive, partly because little relevant information is available and partly because what information there is appears to be somewhat conflicting. For example, both direct [304] and inverse [305] correlations have been found between surface elasticity and foam stability and performance in porous media. Overall, it is generally found that the effectiveness of foams in porous media is not reliably predicted based on bulk physical properties or on bulk foam measurements. Instead, it tends to be more useful to study the foaming properties in porous media at various laboratory scales micro-, meso-, and macro-scale. 

Edens, F.W. 2001. Involvement of Sel-Plex in physiological stability and performance of broiler chickens. In Science and Technology in the Feed Industry (T.P. Lyons and K.A. Jacques, eds), pp. 349-376. Nottingham University Press, Nottingham, UK. 

The detection systems first must be calibrated for counting efficiency to permit conversion of the sample count rate to the disintegration rate. These systems are monitored periodically for their stability and performance by measuring the count rates of reliable radionuclide sources and the radiation background. Records are maintained for each instrument to comply with quality assurance specifications. Graphs of count rates recorded at frequent intervals for periods of months or years provide a visual record of detector and background stability and indicate deviations from the norm. 

Although it is possible to some extent to predict the stability and performance of certain types of perfumery material in any base—for example, the instability of esters in acid media—perfumers must usually rely on the experience gained from the testing of individual perfumery materials. This is a laborious undertaking and one that occupies much of the time of both the perfumer and the application chemist. As has been mentioned earlier, such testing is normally carried out at elevated temperature as well as at ambient temperature and in the cold. 

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