Fireset materials aging study

Polymer concrete: A potential construction material for desalination plants. Part I

In this paper I discuss the influence of electron correlation effects in solids of current interest in solid state physics and chemistry and some experimental techniques which have been used to determine the magnitude of the electron-electron interactions. Of course the things we are really interested in solids are their physical properties such as the electrical, magnetic, thermal etc. properties and the effects of electron correlation on these. The measurement of these properties in themselves seldom contain enough detailed information to draw conclusions as to the origin of a discrepancy with conventional one particle like theory. For example we want to know why La2CuO4 is an antiferromagnetic insulator with a 2 eV band gap. The measurements of physical properties are usually macroscopic in character and in many cases boil down to the determination of a few quantities like the linear temperature coefficient of the specific heat or the power law dependence of the electrical conductivity at low temperatures or the temperature dependence of the specific heat, or the temperature dependence of the magnetic susceptibility.

Increasing efforts have been spent in the past two decades on field measurement of soil physical properties and on the development of transport models. Here a summary is given of the characteristics of field soils gleaned from such measurements. The principle feature of field soils is their variability over many length and time scales. Issues involved in measurements in a heterogeneous environment are considered. These include the interaction of measurement scale with perceived variability, soil-imposed weighting of measurements, the Heisenberg uncertainty principle, the use of correlations, inverse measurement techniques, and soil macrostructure and biological activity. Some criteria for field measurements are identified. Predictive frameworks for interpreting and using field data are discussed. These range from the fully deterministic to stochastic theories. The successes and limitations of these are considered. Finally, some remaining problem areas are identified.

Solute transport and dispersion.- Solute transport and dispersion - Commentary.- Quasianalytic and analytic approaches to unsaturated flow.- Quasianalytic and analytic approaches to unsaturated flow - Commentary.- Measurement of soil physical properties in the field.- Measurement of soil physical properties in the field - Commentary.- Canopy transport processes.- Canopy transport processes - Commentary.- Surface temperature and the surface energy balance.- Surface temperature and the surface energy balance - Commentary.- Stomatal physiology and gas exchange in the field.- Stomatal physiology and gas exchange in the field - Commentary.- Air flow over complex terrain.- Air flow over complex terrain - Commentary.- Convective processes in the lower atmosphere.- Convective processes in the lower atmosphere - Commentary.- Turbulent wakes in the atmospheric boundary layer.- Turbulent wakes in the atmospheric boundary layer - Commentary.- Particulate transport in the atmosphere: wind erosion.- Processes of water erosion.- One-dimensional solid-liquid separation.- One-dimensional solid-liquid separation - Commentary.- Atmospheric dispersion - Observations and Models.- Atmospheric dispersion - Observations and Models - Commentary.

Measurements of physical properties during transesterification of soybean oil to biodiesel for prediction of reaction progress

Research trends and strategies for the improvement of anaerobic digestion of food waste in psychrophilic temperatures conditions

Evaluation of cement matrices for the immobilization of polychlorinated benzenes

By measurement of physical properties and microscopic examination it was found that the phase Al4Ca undergoes a martensitic transformation with Ms≃130° C. The low temperature structure is monoclinic, a=0.6158 nm, b=0.6175 nm, c=1.118 nm, β=88.9°. The Dl3 structure ascribed to Al4Ca hitherto is valid only above Ms. Orientation relationships indicate that the transformation proceeds by a shear of 1.1° on (1 1 0) planes of the Dl3 structure.

Effect of concentration and temperature on apparent molar properties of homologous α-amino acids in aqueous-semicarbazide hydrochloride solutions: A quest on the concept of kosmotropic/chaotropic behaviour of amino acids

Exhaustion of fossil fuels, tremendous increase of materials demand, and unpredictable prices of petroleum based products urge upon the sustainable development. Three different epoxy resins have been synthesized from monoglyceride of Mesua ferrea L. seed oil and epichlorohydrin with and without other dihydroxy compound like tetrabromobisphenol-A (TBPA) and bisphenol-A (BPA). The synthesized epoxy resin were characterized by measurement of physical properties like epoxy equivalent, viscosity, hydroxyl value, saponification value, acid value, etc., and spectroscopic techniques like FTIR and 1H NMR. High thermostability with initial decompositions temperature of 225–265°C was observed for the cured resins and 75 mol % BPA based resin exhibits the highest thermostability. Newtonian flow behavior was observed for all resins as indicated by the rheometric study (CVO 100). The flame retardency rating of TBPA based epoxy was found to be V1 as tested by UL 94. The performance characteristics as coating materials were studied by the measurement of gloss, impact resistance, scratch hardness, tensile strength, elongation at break, adhesive strength, and chemical resistance. The results indicate the suitability of the synthesized resins as coating materials. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010

Control and assessment of plugging of mesopores in SBA-15 materials

The present study investigates a Blasius-Rayleigh-Stokes flow with melting heat transfer across a semi-infinite hot plate. The base fluid included SAE50 motor oil, and the nanoparticle was zinc oxide (ZnO). The similarity variable is used to convert the nonlinear differential equations to ODEs. The RKF-45 MATLAB algorithm is used to solve these nonlinear equations numerically. In order to demonstrate the effect of the many variables in the issue, the findings are shown visually. Different parameters on fluid velocity and energy profiles may be offered in graphs for the nanofluid phase (ZnO+SAE50) and the fluid phase, which show the effects on physical aspects of fluid behaviour. Measurements of physical properties are recorded and observed. With the addition of base fluid, the nanofluid (ZnO+SAE50) becomes more effective. Moreover, it is also observed that the higher Ec values benefit from a boost from the temperature field. Additionally, the thickness of the momentum layer is lowered for values of ω that are rapidly rising. Greater Pr is made possible by an increase in thermal layer thickness as a result of melting.

We present the preparation and characterization of an $\mathrm{E}{\mathrm{r}}_{2}\mathrm{Z}{\mathrm{r}}_{2}{\mathrm{O}}_{7}$ single crystal. The material was studied by means of x-ray and neutron diffraction, magnetization, AC susceptibility, and specific heat measurements. The defect-fluorite type of cubic structure, previously reported as the crystal structure of $\mathrm{E}{\mathrm{r}}_{2}\mathrm{Z}{\mathrm{r}}_{2}{\mathrm{O}}_{7}$, is consistent with our x-ray powder diffraction data. The measurements of physical properties were performed in magnetic field applied along principal crystallographic directions. A negligible directional dependence of physical properties is observed at temperatures down to 3 K, and only minor differences can be traced at lower temperatures. A low-temperature anomaly in magnetization and specific heat data and its evolution with applied magnetic field is followed. A frequency-dependent shift of freezing temperature was observed in AC susceptibility. Several origins of the observed anomaly are discussed, leaving a spin-glass state as the most probable explanation.

A new low global warming potential (GWP) fluid hydrochlorofluoroolefin trans-isomer of 1-chloro-3,3,3-trifluoro-propene (HCFO-1233zd(E)) has been developed in our laboratory. HCFO-1233zd(E) has a very short atmospheric lifetime of 26 days and a global warming potential (GWP) of less than 5 (Wong et al., http://www.honeywell-solsticelba.com.product-info/environmental-regulatory/#atmospheric-impact, 2012). This makes it an excellent environmentally friendly candidate for many applications including refrigeration, foam expansion agents, and as solvents. In this work we have presented our measurements of physical properties like the boiling point, critical temperature, vapor pressure, liquid density, and surface tension of HCFO-1233zd(E). We have also provided our calculated ideal gas heat capacity at constant pressure using quantum mechanical theory. Temperature-dependent properties are correlated with standard forms of equations and described in the paper.

There are several advantages in using an autographic method of recording changes of physical properties with temperature; the article describes methods of employing the wellknown Thread Recorder for recording changes of (a) dilatation and (b) resistivity of metals and alloys with temperature. A method is also described of combining recorded time-temperature and time-property curves to give a single temperature-property curve.