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A compound handling system handles a multiplicity of chemical or biological compounds or samples, and is especially adapted for high throughput screening of compounds that are stored and handled in aliquotted form. Aliquots are contained in individual containers and the containers are arranged in ra

A compound handling system handles a multiplicity of chemical or biological compounds or samples, and is especially adapted for high throughput screening of compounds that are stored and handled in aliquotted form. Aliquots are contained in individual containers and the containers are arranged in racks having holding spaces open at opposite ends. Insertion and removal of the containers is effected in either direction of movement, and each container may be sealed with foil to protect its integrity.

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1. A rack for use in a compound handling system for handling a multiplicity of tubes containing aliquots of chemical or biological samples, which comprises:a peripheral frame, said frame having a top side and a bottom side;grid-like separation walls that define a plurality of rows of storage compart

1. A rack for use in a compound handling system for handling a multiplicity of tubes containing aliquots of chemical or biological samples, which comprises:a peripheral frame, said frame having a top side and a bottom side;grid-like separation walls that define a plurality of rows of storage compartments within said frame, each compartment being configured and dimensioned for receiving a substantial part of a sample tube, said storage compartments being adjacent to each other and defined by separation walls between them, each of said storage compartments having an inner wall and a top opening at the top side of the frame and a bottom opening at the bottom side of the frame so that a sample tube is insertable into the storage compartment from both the top side of the frame and the bottom side of the frame and is removable from the storage compartment through both the top opening and the bottom opening of the storage compartment,the cross-section of each of said storage compartment being constant over the entire length of the storage compartment, whereby a sample to be inserted into the storage compartment through the top opening thereof can be removed from the storage through the bottom opening of the storage compartment, andmeans for retaining a sample tube within each of said storage compartments, said retaining means comprising a projection of the inner surface of the wall of each storage compartment, said projection being suitable for snapping between two ridges of the outer wall of a sample tube that is positioned within said compartment. 2. A rack according to claim 1, wherein each of said compartments suitable for receiving and holding an entire sample tube. 3. A rack according to claim 1, wherein each of said storage compartment is rectangular. 4. A system for handling a plurality of sample tubes, said system comprising(a) A rack for use in a compound handling system for handling a multiplicity of tubes containing aliquots of chemical or biological samples, which comprises:a peripheral frame, said frame having a top side and a bottom side;grid-like separation walls that define a plurality of rows of storage compartments within said frame, each compartment being configured and dimensioned for receiving a substantial part of a sample tube, said storage compartments being adjacent to each other and defined by separation walls between them, each of said storage compartments having an inner wall and a top opening at the top side of the frame and a bottom opening at the bottom side of the frame so that a sample tube is insertable into the storage compartment from both the top side of the frame and the bottom side of the frame and is removable from the storage compartment through both the top opening and the bottom opening of the storage compartment,the cross-section of each of said storage compartment being constant over the entire length of the storage compartment, whereby a sample to be inserted into a storage compartment through the top opening thereof can be removed from the storage through the bottom opening of the storage compartment, andmeans for retaining a sample tube within each of said storage compartments, said retaining means comprising a projection of the inner surface of the wall of each storage compartment, said projection being suitable for snapping between two ridges of the outer wall of a sample tube that is positioned within said compartment; and(b) a plurality of sample tubes each of which contains an aliquot of a chemical or biological sample, each of said sample tubes having a shape that fits into a storage chamber of said rack and that enables insertion of the sample tube into one of said storage compartments from both the top side of the frame and the bottom side of the frame with one and the same orientation of the sample tube with respect to the frame, the outer wall of each of said sample tubes having two annular ridges located in planes which are parallel to other and normal to the length axis of the sample tube. 5. A system according to claim 4, wherein each of said compartment is suitable for receiving and holding an entire sample tube. 6. A system according to claim 1, wherein each of said storage compartment is rectangular.