Abstract: A relay of the present disclosure includes an insulation cover, a first yoke plate, a contact assembly, a driving assembly and a pressure relief valve assembly. The first yoke plate is connected with the insulation cover and encloses a contact chamber with the insulation cover. The first yoke plate is provided with a pressure relief hole. The driving assembly is connected with the movable contact piece and configured to drive the movable contact piece move. The pressure relief valve assembly is arranged on the first yoke plate and configured to close the pressure relief hole when a gas pressure in the contact chamber is less than a threshold and configured to be broken to open the pressure relief hole when the gas pressure in the contact chamber is greater than or equal to the threshold.

Abstract: A method for stabilizing cell-free nucleic acids. The method includes providing a composition and applying the composition to a biological sample as a stabilizing agent for the cell-free nucleic acids contained in the biological sample. The composition includes at least one buffering compound that buffers to a pH value of 7 or below, at least one anticoagulant and urotropin in aqueous solution.

Abstract: The invention relates to a composition for use as a stabilizer and a method for stabilizing biological samples, in particular of whole blood, in particular for stabilizing the content and the integrity of cell-free nucleic acids. The composition has, in aqueous solution, at least one buffer substance, which buffers to a pH value of 7 or less, preferably 3.5 to 7.0, at least one chelating agent for divalent cations and urotropine, optionally PEG, or consists thereof.