A storage device is provided for direct memory access. A section of the sampling-electrode channel located in front of the sampling-electrode head and extending up to the interior of the measuring conduit is left as a free space. The invention also relates to a method of cleaning sand and a method of increasing the flow rate of sand through a hydrocyclone cleaning system such as that described above. Alternately, the plate and the gasket are combined into a single plate formed of a flexible material having an adhesive on one surface. The process according to the invention starts from economical starting materials, provides good yields and allows the production of perbenzylated saccharides with 1-O-functionalized side chains on an enlarged scale. The invention also relates to methods for use of such polymorphic markers for predicting drug response to drugs for treating cardiovascular disease, or for monitoring the effectiveness of such drugs.