Automatic fluid-composition control machines and instruments; DNA chips; laboratory apparatus and computer systems for use in protein purification; magnetic separators for scientific use; medical laboratory research instruments for DNA analysis; medical laboratory research instruments for RNA analysis; medical laboratory research instruments for nucleic acid isolation; scientific apparatus and instruments, namely, fluid handling device used for disposable bioprocessing applications and parts and fittings therefor; scientific instruments, namely, electronic analyzers for testing and analyzing chemical and biological substances for the presence, absence, or quantity of contaminants.