The effect of Mo on the microstructure evolution and coarsening kinetics of c0 precipitates in the Ni–Al–Mo system is studied using phase-field simulations with inputs from thermodynamic, kinetic and lattice parameter databases. For alloys of different compositions, the precipitate morphology and the statistical information of precipitate sizes are predicted as a function of annealing time. It ...

Precipitation process in an A1-0.25 wt.%Sc alloy aged at 573 K has been investigated by resistivity and hardness measurements, transmission electron microscopy, and atom-probe field ion microscopy. It was found that the equilibrium A13Sc phase particles precipitate homogeneously from the begining. The particles coarsen following the Lifschitz-Wagner rule after the completion of the nucleation-a...

1. Salt-soluble rat skin collagen was precipitated from solution at neutral pH and 37 degrees . On cooling, a portion of the collagen returned into solution. The fractions were separated, the supernatant was concentrated and the precipitate was redissolved in dilute acetic acid. 2. Solutions of supernatant and precipitate were subjected to the same fractionation procedure, giving four fractions...

This paper focuses on the modeling of heat and mass transfer in precursor containing droplets injected into a plasma jet and the estimation of precipitate formation in these droplets from the solute. A hybrid model is employed where the plasma temperature and velocity fields are obtained from previous experimental results and the heat and mass transfer around droplets are modeled. The precipita...

The critical resolved shear stress of an Al 4 wt. % Cu alloy containing a homogeneous distribution θ′′ precipitates was determined by means dislocation dynamics simulations. size distribution, shape, orientation and volume fraction the in were obtained from transmission electron microscopy observations while parameters controlling dislocation/precipitate interactions (elastic mismatch, transfor...

The purpose of this study was to obtain an amorphous system with minimum unit operations that will prevent recrystallization of amorphous drugs since preparation, during processing (compression) and further storage. Amorphous celecoxib, solid dispersion (SD) of celecoxib with polyvinyl pyrrollidone (PVP) and co-precipitate with PVP and carrageenan (CAR) in different ratios were prepared by the ...

The localization of Ca-accumulating structures in the longitudinal body wall muscle (LBWM) of the opisthobranch mollusc Dolabella auricularia and their role in the contraction-relaxation cycle were studied by fixing the LBWM fibers at rest and during mechanical response to 400 mM K or to 10(-4)--10(-3) M acetylcholine in a 1% OsO4 solution containing 2% K pyroantimonate. In the resting fibers, ...

A range of 22 mouse anti-P. falciparum monoclonal antibodies have been characterized by indirect immunofluorescence and immunoprecipitation. On the basis of these studies, 5 groups of antibodies and 6 classes of antigen were defined. Group I antibodies give, bright, uniform, generalised staining of all blood stages including gametocytes. Three of these antibodies precipitate a metabolically lab...