Abstract: A method of detecting a nucleic acid including a) mixing a solution containing a carboxylic acid and/or a salt thereof, a cerium oxide support and a sample containing a nucleic acid to adsorb said nucleic acid to said cerium oxide support, b) separating said cerium oxide support on which said nucleic acid was adsorbed from the mixture obtained in a), c) collecting said nucleic acid by adding an eluent to said cerium oxide support on which said nucleic acid was adsorbed and separated in b), and d) detecting said nucleic acid collected in c) by a hybridization reaction or a nucleic acid amplification reaction.

Abstract: A method of detecting a nucleic acid including a) mixing a solution containing a carboxylic acid and/or a salt thereof, a cerium oxide support and a sample containing a nucleic acid to adsorb said nucleic acid to said cerium oxide support, b) separating said cerium oxide support on which said nucleic acid was adsorbed from the mixture obtained in a), c) collecting said nucleic acid by adding an eluent to said cerium oxide support on which said nucleic acid was adsorbed and separated in b), and d) detecting said nucleic acid collected in c) by a hybridization reaction or a nucleic acid amplification reaction.

Abstract: A method of collecting cell-free DNA from a body fluid sample includes step a) of mixing an aluminum oxide support including a water-soluble neutral polymer adsorbed on a surface thereof with the body fluid sample to adsorb the cell-free DNA onto the support, step b) separating the support on which the cell-free DNA was adsorbed from the mixture mixed in the step a), and step c) collecting the cell-free DNA by adding an eluent to the support on which the cell-free DNA was adsorbed and which was separated in the step b).

Abstract: A method collects a nucleic acid from a biological sample and includes the steps of: a) mixing a support including a water-soluble neutral polymer adsorbed on a cerium oxide surface thereof with a solution containing a nucleic acid to adsorb the nucleic acid to the support; b) separating the support on which the nucleic acid was adsorbed from the solution mixed in step a); and c) collecting the nucleic acid by adding an eluent to the support on which the nucleic acid was adsorbed and which is separated in step b).

Abstract: According to an aspect of the invention, a data relay system includes: a plurality of server devices which manages data transmitted and received by a client device; and a relay device which relays communication between the client device and each of the plurality of server devices. Each of the plurality of server devices includes: a data storage unit that stores data and a request processing unit that performs processing corresponding to a received request. The relay device includes: a synchronization unit that synchronizes the data in the data storage unit of each of the plurality of server devices; an identification information registration unit that acquires identification information, and a relay processing unit that performs relay processing of receiving a request sent to the server devices by the client device.