5 Diagnostic agents, namely for detection of nucleic acids in clinical, scientific or forensic laboratories; array based diagnostic agents namely colloidal nano-sized metal particles, pre-hybridization buffer solutions, hybridization buffer solutions,washing buffer solutions, blocking buffer solutions, dilution solutions,archiving/storing solutions, nucleic acid detection reagents, namely nano-sized metal colloidal particles, pre-hybridization buffer solutions, hybridization buffer solutions, washing buffer solutions, blocking buffer solutions, dilution buffer solutions, archiving/storing buffer solutions; buffer solutions namely pre-hybridization solutions, hybridization solutions, washing solutions, blocking solutions, dilution solutions archiving/storing solutions; nucleic acid detection kits comprised of nano-sized metal colloidal particles, pre-hybridization solutions, hybridization solutions, washing solutions, blocking solutions, dilution solution, archiving/storing solution, incubation and hybridization chambers,archiving containers, lifter slips, for diagnostic use on the basis of biological interactions