Abstract: The present invention is a film having at least one reflection band in which the reflectance is 30% or greater continuously in at least a 100-nm range in a wavelength range of 1200-1800 nm when light is incident from at least one side, the mean transmittance in a wavelength range of 430-600 nm is 70% or greater, and the average value of the axial rigidity of the film in the principal orientation axis direction of the film and in the direction orthogonal thereto is 45 N/m or less.

Abstract: The present invention is a film having at least one reflection band in which the reflectance is 30% or greater continuously in at least a 100-nm range in a wavelength range of 1200-1800 nm when light is incident from at least one side, the mean transmittance in a wavelength range of 430-600 nm is 70% or greater, and the average value of the axial rigidity of the film in the principal orientation axis direction of the film and in the direction orthogonal thereto is 45 N/m or less.

Abstract: Disclosed is a method for detecting a nucleic acid using a substance that suppresses, in the labeling step of the post-staining method, detachment of a target nucleic acid that has once hybridized with a capture probe immobilized on a support, which method enables detection of the target nucleic acid with a sensitivity equivalent to or higher than that achieved by a method using sodium ion even in cases where the substance is used at a lower concentration. The method for detecting a nucleic acid comprises the steps of: (1) hybridizing a capture probe with a target nucleic acid to form a double-stranded nucleic acid; bringing the formed double-stranded nucleic acid into contact with a solution containing a labeling substance and a divalent metal cation at a concentration of not less than 10 mM to introduce the labeling substance into the double-stranded nucleic acid; and detecting the labeling substance introduced into the double-stranded nucleic acid.

Abstract: Disclosed is a method for detecting a nucleic acid using a substance that suppresses, in the labeling step of the post-staining method, detachment of a target nucleic acid that has once hybridized with a capture probe immobilized on a support, which method enables detection of the target nucleic acid with a sensitivity equivalent to or higher than that achieved by a method using sodium ion even in cases where the substance is used at a lower concentration. The method for detecting a nucleic acid comprises the steps of: (1) hybridizing a capture probe with a target nucleic acid to form a double-stranded nucleic acid; bringing the formed double-stranded nucleic acid into contact with a solution containing a labeling substance and a divalent metal cation at a concentration of not less than 10 mM to introduce the labeling substance into the double-stranded nucleic acid; and detecting the labeling substance introduced into the double-stranded nucleic acid.