Abstract: The invention relates to a method for determining the amount of nucleic acid present in a sample, wherein:—a fluorophore is added to the sample,—fluorescence intensities emitted by the fluorophore at least two emission wavelengths in response to light stimulations at least two excitation wavelengths respectively are measured, and—the amount of nucleic acid present in the sample is deduced from the measured fluorescence intensities.

Abstract: In one aspect, the present invention concerns methods and kits for quantifying a target nucleic acid in a sample. In embodiments, a method comprises sequestrating the target nucleic acid by one or more interactors to form a sequestered conjugate that will be further labeled to form a labeled conjugate. The signal produced by the labeled conjugate is measured and correlated to the amount of the target nucleic acid. In another aspect, the present invention concerns a method for quantifying a target nucleic acid in a sample by a reaction of the nucleic acids in the sample with a nucleic acid interactor or set of interactors to form a conjugate. The conjugate is then sequestered from the rest of the sample with a molecule bound to a support, to form a sequestered conjugate. The sequestered conjugate is labeled to form a labeled conjugate. The signal produced by the labeled conjugate is measured and correlated to the amount of the target nucleic acid.

Abstract: A method for labeling a product includes a step of adding on or in the product a plurality of single-stranded polynucleotides, which plurality of polynucleotides includes at least one target polynucleotide constituted of a single-stranded polynucleotide of predetermined length and sequence, and decoy polynucleotides which have identical or different predetermined lengths and identical or different predetermined sequence, which decoy polynucleotides have a length or lengths identical to or different from and sequences different from the sequence of the at least one target polynucleotide, wherein each of the target and decoy polynucleotides does not hybridize with any of the other polynucleotides of the plurality of polynucleotides and wherein the polynucleotides of the plurality of polynucleotides are deoxyribonucleic or ribonucleic acid sequences, respectively having the same proportion of the four, natural or modified, bases A, C, G, and T, or A, C, G and U.

Abstract: The invention relates to a method for determining the amount of nucleic acid present in a sample, wherein:—a fluorophore is added to the sample,—fluorescence intensities emitted by the fluorophore at least two emission wavelengths in response to light stimulations at least two excitation wavelengths respectively are measured, and—the amount of nucleic acid present in the sample is deduced from the measured fluorescence intensities.