Spherulitic growth of hen egg-white lysozyme crystals

Article Abstract:

An in situ study, using optical microscopy is employed to investigate the morphology and growth kinetics of the lysozyme spherulites that are grown from sodium nitrate and sodium thiocyanate solutions through heterogeneous nucleation. The analysis of the spherulitic growth of hen egg-white lysozyme crystals reveal that the surface processes act as the late-limiting step, hence proving that polymorphic forms of the spherulites are less stable than the monoclinic form.

Sodium Nitrate, Lysozyme, Thiocyanates

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Polymorph formation studied by 3D nucleation simulations: Application to a yellow isoxazolone dye, paracetamol, and L-glutamic acid

Article Abstract:

A combination of the growth probability method and several three-dimensional (3D) nucleation simulations is used to study the formation of polymorphs, wherein the nucleus size acts as a function of the driving force for crystallization. The study has found application in a large number of fields that includes a yellow isoxazolone dye, paracetamol and L-glutamic acid, as they show dominant nucleation of their stable form at all driving forces.

Pharmaceutical Preparation Manufacturing, Pharmaceutical preparations, Acetaminophen-Based Analgesics, Usage, Glutamate, Acetaminophen, Probabilities, Probability theory, Oxazoles

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Atomistic mechanisms of phase separation and formation of solid solutions: Model studies of NaCl, Nacl-NaF, and Na([Cl.sub.1-x][Br.sub.x]) crystallization from the melt

Article Abstract:

The transition path sampling molecular dynamics simulations are used to investigate the crystallization of sodium chloride from melt and mixtures with other sodium halides. The nucleation mechanisms of both the solidification and the melting process at the atomic level are explored.

Sodium Fluoride, Structure, Sodium chloride

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