Experimental and model-based approach to evaluate solvent effects on the solubility of the pharmaceutical artemisinin.

The separation and purification of plant-based Active Pharmaceutical Ingredients (API) from extracts is a crucial part in pharmaceutical process development. For the purification of the antimalarial drug component artemisinin (ARTE) from an Artemisia anna L. toluene extract, antisolvent crystallization is considered.

Real-Time Crystal Growth Monitoring of Boric Acid from Sodium or Lithium Sulfate Containing Aqueous Solutions by Atomic Force Microscopy.

The crystal growth of boric acid from an aqueous solution in the absence and presence of sodium and lithium sulfate was studied by real-time monitoring. For this purpose, atomic force microscopy in situ has been used. The results show that the growth mechanism of boric acid from its pure and impure solutions is spiral growth driven by screw dislocation and that the velocity of advancement of steps on the crystal surface, and the relative growth rate (ratio of the growth rate in presence and absence of a salt) is reduced in the presence of salts.

Shortcut Model for Batch Preferential Crystallization Coupled with Racemization for Conglomerate-Forming Chiral Systems.

Kinetically controlled preferential crystallization (PC) is a well-established elegant concept to separate mixtures of enantiomers of conglomerate-forming systems. Based on a smaller number of laboratory investigations, the key parameters of an available shortcut model (SCM) can be estimated, allowing for a rapid and reliable process design. This paper addresses a severe limitation of the method, namely, the limitation of the yield to 50%.

Cell-Free Multi-Enzyme Synthesis and Purification of Uridine Diphosphate Galactose.

High costs and low availability of UDP-galactose hampers the enzymatic synthesis of valuable oligosaccharides such as human milk oligosaccharides. Here, we report the development of a platform for the scalable, biocatalytic synthesis and purification of UDP-galactose. UDP-galactose was produced with a titer of 48 mM (27.

A Contribution to the Solid State Forms of Bis(demethoxy)curcumin: Co-Crystal Screening and Characterization.

Bis(demethoxy)curcumin (BDMC) is one of the main active components found in turmeric. Major drawbacks for its usage are its low aqueous solubility, and the challenging separation from other curcuminoids present in turmeric. Co-crystallization can be applied to alter the physicochemical properties of BDMC in a desired manner.