Abstract: The present invention relates to a method for liquefying respiratory samples, such as sputum samples. Samples of this type are characterized in that they can be highly viscous or semisolid, which means that to detect pathogenic microorganisms in them, they require prior treatment in order to make them more liquid and homogeneous. The liquefaction method proposed in the present innovation enables pathogenic microorganisms that cause respiratory infections to be subsequently detected.

Abstract: The invention relates to a process for storing protein-decorated nanoparticles on paper substrates without irreversible binding, and particularly for storing protein-decorated nanoparticles within paper substrates modified with a polymer. The invention also relates to a reservoir containing protein-decorated nanoparticle capable of stablishing biological interactions obtained by the process and its use in biosensors made of paper.