Abstract: A concentration device that concentrates a solution containing a biological substance includes: a first chamber into which the solution is to be introduced; a second chamber to be filled with a drawing agent; and a film that separates a space of the first chamber and a space of the second chamber. The film has a first region and a second region. The first region is semipermeable in that the first region is permeable to a solvent of the solution but impermeable to the biological substance and the drawing agent. The second region is impermeable to the solution, the biological substance, and the drawing agent. When the solution is introduced into the first chamber, the film is positioned to incline with respect to a surface of the solution. The second region is positioned below the first region with respect to the surface of the solution.

Abstract: A gas sensor includes: a sensing unit; and a first electrode and a second electrode that are a pair of electrodes each electrically connected to the sensing unit. The sensing unit has a conductive material and a polymer having a siloxane bond as a main chain structure. The polymer has a cyano group in a side chain.

Abstract: Provided is a thin layer chromatography plate that makes it possible to separate a plurality of components from each other more simply and more quickly. Thin layer chromatography plate includes substrate and separation layer that is disposed on substrate for separating multiple components included in a sample from each other. Separation layer has first layer that has a band shape and extends in first development direction and second layer that extends in second development direction orthogonal to first development direction. Second layer is in contact with first layer. First layer includes a hydrophilic porous body. Second layer includes a hydrophobic porous body.

Abstract: An object of the present disclosure is to provide a method and a system capable of extracting biomolecules simply and highly reproducibly by using skin tissue collected with a tape stripping method. The biomolecule extraction method according to the present disclosure is a method for extracting biomolecules contained in skin tissue by using an extraction reagent and a magnetic substance in an extraction container, and has the following features. That is, a tape that has collected the skin tissue is brought into contact with the extraction reagent and the magnetic substance, the magnetic substance in the extraction container is moved by magnetic force generated from a magnet provided outside the extraction container, and the biomolecules are extracted from the skin tissue into the extraction reagent by mechanical friction between the magnetic substance and the tape adhered with the skin tissue.