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  2. Electroanalytical methods - Wikipedia

    en.wikipedia.org/wiki/Electroanalytical_methods

    In these experiments, the total current passed is measured directly or indirectly to determine the number of electrons passed. Knowing the number of electrons passed can indicate the concentration of the analyte or when the concentration is known, the number of electrons transferred in the redox reaction.

  3. Biosensor - Wikipedia

    en.wikipedia.org/wiki/Biosensor

    Biosensors used for screening combinatorial DNA libraries. In a biosensor, the bioreceptor is designed to interact with the specific analyte of interest to produce an effect measurable by the transducer. High selectivity for the analyte among a matrix of other chemical or biological components is a key requirement of the bioreceptor.

  4. Bio-FET - Wikipedia

    en.wikipedia.org/wiki/Bio-FET

    Bio-FETs couple a transistor device with a bio-sensitive layer that can specifically detect bio-molecules such as nucleic acids and proteins. A Bio-FET system consists of a semiconducting field-effect transistor that acts as a transducer separated by an insulator layer (e.g. SiO 2) from the biological recognition element (e.g. receptors or probe molecules) which are selective to the target ...

  5. Nicotinamide adenine dinucleotide - Wikipedia

    en.wikipedia.org/wiki/Nicotinamide_adenine_di...

    The actual concentration of NAD + in cell cytosol is harder to measure, with recent estimates in animal cells ranging around 0.3 mM, [18] [19] and approximately 1.0 to 2.0 mM in yeast. [20] However, more than 80% of NADH fluorescence in mitochondria is from bound form, so the concentration in solution is much lower. [21]

  6. Bio-layer interferometry - Wikipedia

    en.wikipedia.org/wiki/Bio-layer_interferometry

    To prepare for BLI analysis between two unique biomolecules, the ligand is first immobilized onto a bio compatible biosensor while the analyte is in solution. [5] Shortly after this, the biosensor tip is dipped into the solution and the target molecule will begin to associate with the analyte, producing a layer on top of the biosensor tip.

  7. Fluorescence in the life sciences - Wikipedia

    en.wikipedia.org/wiki/Fluorescence_in_the_life...

    A simplified Jablonski diagram illustrating the change of energy levels.. The principle behind fluorescence is that the fluorescent moiety contains electrons which can absorb a photon and briefly enter an excited state before either dispersing the energy non-radiatively or emitting it as a photon, but with a lower energy, i.e., at a longer wavelength (wavelength and energy are inversely ...

  8. Nassau County flags not lowered to half-staff for Jimmy Carter

    www.aol.com/news/nassau-county-flags-not-lowered...

    A Republican county official on Long Island is refusing to lower flags to half-staff following the death of former President Jimmy Carter.

  9. Immunoassay - Wikipedia

    en.wikipedia.org/wiki/Immunoassay

    The active enzyme reduces NAD (no signal) to NADH (which absorbs at 340 nm), so absorbance is monitored at 340 nm. When the labeled analyte binds to the Ab, the enzyme becomes inactive, and a signal is generated by the free label. The signal intensity is directly proportional to the analyte concentration. [19]

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