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  2. Ultraviolet–visible spectroscopy - Wikipedia

    en.wikipedia.org/wiki/Ultraviolet–visible...

    UV-Vis can be used to monitor structural changes in DNA. [8] UV-Vis spectroscopy is routinely used in analytical chemistry for the quantitative determination of diverse analytes or sample, such as transition metal ions, highly conjugated organic compounds, and biological macromolecules. Spectroscopic analysis is commonly carried out in ...

  3. Variable pathlength cell - Wikipedia

    en.wikipedia.org/wiki/Variable_pathlength_cell

    In ultraviolet-visible spectroscopy or spectroscopy in general a 1 cm pathlength cuvette is used to measure samples. The cuvette is filled with sample, light is passed through the sample and intensity readings are taken. The slope spectroscopy technique can be applied using the same methods as in absorption spectroscopy.

  4. Nucleic acid quantitation - Wikipedia

    en.wikipedia.org/wiki/Nucleic_acid_quantitation

    Spectrophotometric analysis is based on the principles that nucleic acids absorb ultraviolet light in a specific pattern. In the case of DNA and RNA, a sample is exposed to ultraviolet light at a wavelength of 260 nanometres (nm) and a photo-detector measures the light that passes through the sample. Some of the ultraviolet light will pass ...

  5. Deuterium arc lamp - Wikipedia

    en.wikipedia.org/wiki/Deuterium_arc_lamp

    This is similar to the situation in a hydrogen flame. Arc lamps made with ordinary light-hydrogen provide a very similar UV spectrum to deuterium, and have been used in UV spectroscopes. However, lamps using deuterium have a longer life span and an emissivity (intensity) at the far end of their UV range which is three to five times that of an ...

  6. Ultraviolet photoelectron spectroscopy - Wikipedia

    en.wikipedia.org/wiki/Ultraviolet_photoelectron...

    With this source, Turner's group obtained an energy resolution of 0.02 eV. Turner referred to the method as "molecular photoelectron spectroscopy", now usually "ultraviolet photoelectron spectroscopy" or UPS. As compared to XPS, UPS is limited to energy levels of valence electrons, but measures them more accurately.

  7. DOGE tracker: A running list of what Elon Musk and Vivek ...

    www.aol.com/doge-tracker-running-list-elon...

    Once Musk and Ramaswamy step into their roles, they'll have to answer for commitments they've made, such as firing employees and deleting departments. DOGE tracker: A running list of what Elon ...

  8. Top industrial CEOs warn Trump's tariff and budget plans ...

    www.aol.com/finance/top-industrial-ceos-warn...

    President-elect Donald Trump’s policy agenda is generally good for business, top executives and analysts told me at the Goldman Sachs Industrial and Materials conference this week. “It’s ...

  9. Molecular electronic transition - Wikipedia

    en.wikipedia.org/wiki/Molecular_electronic...

    In theoretical chemistry, molecular electronic transitions take place when electrons in a molecule are excited from one energy level to a higher energy level. The energy change associated with this transition provides information on the structure of the molecule and determines many of its properties, such as colour.