Chemical compounds used in industry and science, in particular chemical compounds for conducting gene amplification reactions, also called polymerase chain reactions, in particular nucleic acids, oligonucleotides and polymerases; reagent kits comprising generic DNA, DNA primers, oligonucleotides, polymerase and buffers for use in biotechnology fields for conducting the polymerase chain reaction; preparations for purifying foodstuffs or components thereof, in particular silica gels, namely, ch...