Abstract:
The present invention relates to a method for production of separation media using a so called Spinning Disc technology wherein the porosities of the beads are optimized in such a way that a desired biomolecule may be separated from a complex sample. The method comprises the following steps: a) feeding a 4-8% polysaccharide solution, which has a viscosity within 350-450 mPas, at 65-75°C to one or more spinning discs at 3001-3010 rpm to form polysaccharide beads; b) capturing said formed polysaccharide beads in a capturing bath; wherein the porosity of the polysaccharide beads is controlled by varying the temperature of the capturing between 15 and 27°C, preferably between 17.5 and 24.6°C. The method yields porosities that prevent molecules larger than 150 000 g/mol to diffuse into the beads. The invention also relates to separation media produced by the method and use thereof for purification of biomolecules, in particular monoclonal antibodies.
Abstract:
This invention concerns the preparation and use of novel polymeric chromatographic media and preferably mixed mode polymeric chromatographic media. In accordance with the present invention, polymeric media is prepared using polymeric particles derivatized with polyethyleneimine, and preferably such polyethyleneimine derivatized polymeric particles further functionalized with appropriate reactants. The polymeric chromatographic media is especially useful for bioseparations.
Abstract:
The invention relates to novel inorganic absorbent composites consisting of an open-pore, solid, inorganic matrix, comprising cucurbiturils of general formula (I) which are chemically linked in the matrix. Said cucurbiturils form a macrocycle having a cage structure, consisting of n repeating units, wherein n is a whole number 5, 6, 7 or 8, R represents hydrogen or C1-C5 alkyl, and X represents O, S or N. X and R can be the same or different. Said composites are produced by reacting cucurbituril with an inorganic matrix-forming agent, such as silica gel, at 15 to 90°C in a liquid medium. The inventive composites can be used as absorption materials and catalyst supports.
Abstract:
A microchip-based electrospray ionization device and column with affinity adsorbents is disclosed. The invention includes a microchip array.(2) and a capillary tube (1) or alone or attached in combination. At least a portion of the device or column has immobilized affinity adsorbents. Methods for using the device are provided as well for affinity capture of biomolecules to meet the needs for the modern life sciences such as proteomics and drug discover.
Abstract:
Separation devices and systems are described which have a stationary phase and a mobile phase, wherein the stationary phase contains carbon-clad zirconium dioxide particles having attached at least one organic group. The stationary phase which is used in the present invention has the ability to dial in the selectivity by attaching the proper organic groups onto the carbon-clad zirconium dioxide particles in order to achieve the desired separation. Various separation processes are described such as chromatography, electrophoresis, magnetic separations, membrane separations, and the like. The processes to accomplish these types of separations are also described.
Abstract:
A porous, molecularly imprinted polymer and a process for its preparation are described. The porous, molecularly imprinted polymer is characterised in that it is obtainable by providing a porous silica; attaching a molecular template to the surface of the porous silica; filling the pores of the porous silica with a polymer; removing the silica and the molecular template, thereby leaving a porous, molecularly imprinted polymer. The process is characterised by the above defined process steps. Also described are a porous polymer vesicle and its preparation with the same features as defined for the porous, molecularly imprinted polymer and its preparation, except for the lack of the molecular template and thus the lack of the molecular imprint in the porous polymer.
Abstract:
A matrix comprising: a) a polymeric base matrix comprising macropores (pore system 1) and b) an interior material, possibly porous (pore system 2), retained within the macropores. The matrix is characterized in that there is a continuous free volume between the interior material and the pore walls of the macropores. A method for manufacturing a matrix comprising a base matrix having macropores in which an interior material is located. The method is characterized in comprising the steps: (i) providing a base matrix having macropores; (ii) filling the macropores with a soluble form of the interior material; (iii) transforming the insoluble form to an insoluble form; (iv) shrinking the insoluble form; and (v) irreversibly stabilising the material in its shrinked form. The matrix can be used in separation methods, cell culturing, solid phase synthesis of organic molecules, and in catalytic reactions (such as enzyme reactions) and other uses in which porous support matrices are used.