Physical and Chemical Properties of Fluids, Lubricants and Related Materials

Abstract

Spontaneous ignition phenomena have been evaluated for eight experimental hydraulic fluids. The technique of thermo-electric flame detection has been us-J to determine the minimum spontaneous ignition temperature for each system ii air at one atmosphere pressure. Differential thermal analysis has been employed for the study of the thermal and oxidative degradation of two experimental lubricants in the presence of several metal oxide catalysts. Six other lubricant systems without added catalytic agents have been subjected to This document is subject to special export controls and each transmittal to foreign governments or foreign nationals may be made only with prior approval of the Fluid and Lubricant Materials Branch,

Picosecond Pulse Radiolysis Study of Highly Concentrated Nitric Acid Solutions: Formation Mechanism of NO3• Radical

“…At first, let us consider the reaction of OH • radical with undissociated nitric acid through reaction. If we consider the same value of the rate constant of reaction and an equilibrium constant for a 7 M nitric acid solution ( K = 12 M –1 ), , the reaction between OH • and undissociated nitric acid can occur partially, and the slight increase of the signal within the first 4 ns could be to that reaction (Figure ). Nevertheless, we cannot exclude a very low contribution of the reaction .…”

A Pitzer Parametrization To Predict Solution Properties and Salt Solubility in the H–Na–K–Ca–Mg–NO3–H2O System at 298.15 K

“…For the HNO 3 –H 2 O binary system, experimental measurements of the HNO 3 dissociation rate in water exist. − These measurements prove the existence of a neutral species, which is therefore integrated in the model. Consequently, we used these data, in addition to the osmotic and activity coefficient data, to constrain the determination of a relevant set of binary interaction parameters (Table ) and the equilibrium constant of the formation reaction of the HNO 3 0 ion pair.…”

A Brief Overview of Multivariate Data Analysis in Biological Sciences

“…Recently an emerging field named executable biology or integrative biology (Krawetz, 2009;Chen et al, 2009;Aderem, 2007;Fisher and Henzinger 2007) that integrate different datasets by multivariate statistical tools to understand biological systems. Some methods have already been developed for modelling, network and integration for individual gene specific analysis.…”