In this study, the crystallization behavior of melt-spun Al87Ni10La3 amorphous phase was investigated by using X-ray diffraction and non-isothermal differential thermal analysis techniques. The results demonstrated that the amorphous phase exhibited two-stage crystallization on heating, i.e., at first step the amorphous phase transforms into α-Al phase and at second step Al11La3 and Al3Ni inter...

Crystallization processes in the pharmaceutical industry are usually designed to obtain crystals with controlled size, shape, purity, and polymorphic form. Knowledge of the process conditions required to fabricate crystals with controlled characteristics is critical during process development. In this work, continuous crystallization of Ketoconazole, Flufenamic Acid, and L-Glutamic Acid in a no...

A new synthesis approach has been developed to control the morphology of Mn- and Ni-containing carbonate precursors. Through a controlled release of the precipitate, the carbonate precursors form in a "non-classical crystallization" process similar to the natural crystallization of CaCO3, resulting in shapes tunable from microcubes to microspheres. The oriented attachment in the mesocrystal pre...

Many instrumentation developments in crystallization have concentrated on massive parallelization assays and reduction of sample volume per experiment to find initial crystallization conditions. Yet improving the size and diffraction quality of the crystals for diffraction studies often requires decoupling of crystal nucleation and growth. This in turn requires the control of variables such as ...

Four amphiphilic peptides with designed hairpin structure were synthesized and their monolayers were employed as model systems to study biologically inspired calcium carbonate crystallization. Langmuir monolayers of hairpin peptides were investigated by surface pressure area isotherms, surface potential isotherms, Brewster angle microscopy (BAM), atomic force microscopy (AFM) and Fourier transf...

An approach to rapid protein crystallization using very small samples is described. A computer controlled microdispenser is used to make crystallization samples as microbatch droplets under oil. Samples of 1—2 ~l are dispensed ready-mixed and with good precision. The samples are protected from evaporation, contamination and physical shock by the oil. When favourable conditions for crystallizati...

The problem of crystal sizes is one of the central problems of differentiation of a terrestrial magma ocean and it has been an arbitrary parameter in previous models. The crystal sizes are controlled by kinetics of nucleation and crystal growth in a convective magma ocean. In contrast with crystallization in magma chambers, volcanic lavas, dikes, and other relatively well studied systems, nucle...

A new method is described for studying reproducibly, the kinetics of crystallization of calcium fluoride under conditions of constant solution composition. The method can be used even at very low supersaturation. The rate is proportional to the square of the supersaturation, over the range of relative supersaturation, S = 0.20 1.66. The results point to a surface controlled crystallization. The...

Soluble additives are widely used to control crystallization processes, modifying the morphologies, sizes, polymorphs, and physical properties of product crystals. Here, a simple versatile strategy is shown significantly enhance potency soluble additives, ranging from ions amino acids large dye molecules, enabling them be effective even at low concentrations. Addition small amounts miscible org...