| http://www.w3.org/ns/prov#value | - Preferably, one or more segments of the sample vessel 16 are constructed of a flexible, compressible material, such as, for example, polyethylene or polyurethane, to allow selective compression, and preferably flattening, of the sample vessel to move the sample, or other contents of the sample vessel, within the sample vessel, preferably while the sample vessel 16 remains in the device 10.
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