Rina Netzwerk Rna Technologien Gmbh

Xtal Concepts Gmbh

Rapp Optoelectronic Gmbh

Christian Betzel

Karsten Dierks

Peter Muehlig

Rolf Hilgenfeld

Thomas Klupsch

Arne Meyer

Dierk Hilterhaus

Gert Rapp

Peter MÜHLIG

A method for crystallizing a substance dissolved in a solvent, including the following steps: introducing a solvent volume containing the substance into a chamber having a preset temperature, humidity, and gas composition, adding a predetermined volume of a precipitant to the solvent volume containing the substance, allowing the solvent to evaporate while simultaneously observing structural changes in the solvent volume containing the substance and the precipitant by means of dynamic light scattering, detecting weight changes and determining the molarities, making an association with the location in the phase diagram on the basis of the DLS measurement and the results of the molarity determination, allowing a predetermined number of crystal nuclei to form by adding solvent or adding precipitant, putting the solvent volume containing the substance and the precipitant into a metastable state by adding solvent and/or protein solution or by allowing the concentration of the dissolved substance to decrease by allowing nucleation cores to form, maintaining the metastable state by adding a predetermined amount of the substance to the solvent volume containing the substance and the precipitant or allowing the solvent to evaporate until at least one crystal of a predetermined size is formed.

Device and method for monitoring crystallization

The invention relates to a method for monitoring the production of macromolecule crystals containing at least one fluorescence emitter, comprising the following steps: a) a solution volume with dissolved macromolecules of a molecule species containing at least one fluorescence emitter is subjected to conditions, which cause the macromolecules to crystallize to macromolecule crystals or which are expected to cause the macromolecules to crystallize to macromolecule crystals, b) the solution volume of step a is irradiated with coherent light, and the light scattered by the macromolecule crystals is detected in at least one defined spatial angle range by means for the detection scattered light, c) before, simultaneously with or after step b, the solution volume is irradiated with a light source, the light emission of which is suitable for exciting the fluorescence emitter, and the fluorescence light is detected by means for the detection of fluorescence light, and to a device for carrying-out the method.

Method for monitoring the production of biomolecule crystals

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Schenefeld, Germany

Christian Betzel