Patent ID: 8211385

Claim:
An apparatus adapted for nucleic acid denaturization and hybridization of at least one biological sample on at least one carrier member in a chamber, said apparatus comprising: a bottom member of said chamber supporting said at least one carrier member; a hydrophilic porous solid reservoir configured to sorb and desorb water and water vapor, said reservoir disposed inside said chamber; a lid for the chamber configured to position the reservoir directly above the at least one biological sample such that the reservoir does not touch said at least one biological sample, when said lid is positioned to form a closed chamber; and a sample temperature controlling device below said at least one carrier member controlling the temperature of said carrier member and said at least one biological sample, wherein said reservoir either sorbs or desorbs water and water vapor so as to control relative humidity within said closed chamber at above 85% relative humidity, when said lid is positioned to form the closed chamber.