Bio-rad Laboratories, Inc.

Biosearch Technologies, Inc.

Rand Dill

Ronald M Cook

Christopher J Siebert

Samuel Burd

Arnie Baltzley

The present invention is directed to an improved column for use in solid phase synthesis or purification. In a specific embodiment, the column is a disposable plastic column for use in solid phase synthesis or purification of complex chemicals, such as biomolecules and more specifically oligonucleotides. In some embodiments, the column has a top orifice with a sufficient diameter so that a fluid line or a multiple fluid line bundle may dispense fluids into the column with great efficiency. The column has an upper cavity portion configured and sized to render it compatible with dispensing pippetors, so that it can be used as a pipette tip or a pipettor can be used to aspirate the column. The column has a lower cavity portion with a shoulder for ready placement of a lower frit to contain the solid support in a central cavity portion of the column. An upper frit can be conveniently placed in the central cavity portion to seal the solid phase resin. The lower end tip of the column is configured as a luer-type fitting to provide a male luer connection. The upper cavity portion is configured to interface with the male luer of another column, so that two or more columns to be connected in series.

Column for solid phase processing

Embodiments of the present invention are directed to an improved chemical synthesis apparatus for performing chemical synthesis such as nuclei acid synthesis in a plurality of reaction wells or cells in an efficient manner. The apparatus employs dispenser heads that each include a cluster of nozzles which are fluidicly coupled to a plurality of reagent sources for dispensing different reagents through the single dispenser head. Because each dispenser head is capable of dispensing a plurality of different reagents, the apparatus can perform simultaneous synthesis in a plurality of cells at a high throughput without complex and elaborate control of movement of the dispenser heads relative to the cells.

Multi-channel reagent dispensing apparatus

A cartridge for high performance capillary electrophoresis is constructed to accommodate a capillary with a flexible length of tubing surrounding it for the passage of a liquid coolant. Connections and fittings in the cartridge permit quick insertion and removal of the capillary and coolant tube so that capillaries of different lengths can be used with the same cartridge. Apertures in the cartridge body permit the capillary and tubing to be looped outside the cartridge so that different lengths can be connected without the need to coil the capillary inside the cartridge body. A removable capillary aligning device is also disclosed, which fits in the cartridge in a fixed orientation and holds the capillary in alignment with lenses if used and a light beam passing through the cartridge.

Capillary aligning device for on-line optical detection

HPCE capillary cartridge for uncoiled capillaries with liquid coolant

A capillary cartridge for high performance electrophoresis is constructed in two parts--an internal cooling block and an external housing, both constructed to permit sliding of the cooling block within the housing to provide two positions, one of which is a retracted position in which the exposed ends of the capillary, which protrude from the cooling block, are protected by the housing, and the other an extended position in which the exposed ends of the capillary extend beyond the cooling block for access for sample loading and connections to electrode buffers. An improved coolant flow channel inside the cartridge is also included.

Growing community of inventors

Corte Madera, CA, United States of America

Rand Dill