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  2. Ultraviolet-sensitive bead - Wikipedia

    en.wikipedia.org/wiki/Ultraviolet-sensitive_bead

    Ultraviolet-sensitive beads (UV beads) are beads that are colorful in the presence of ultraviolet radiation. Ultraviolet rays are present in sunlight and light from various artificial sources and can cause sunburn or skin cancer. [1] The color change in the beads alerts the wearer to the presence of the radiation. When changing colour they ...

  3. Microbead (research) - Wikipedia

    en.wikipedia.org/wiki/Microbead_(research)

    Microbead (research) Microbeads, also called Ugelstad particles[1][2][3] after the Norwegian chemist, professor John Ugelstad, who invented them in 1977 and patented the method in 1978, [4] are uniform polymer particles, typically 0.5 to 500 microns in diameter. Bio-reactive molecules can be absorbed or coupled to their surface, and used to ...

  4. Cell disruption - Wikipedia

    en.wikipedia.org/wiki/Cell_disruption

    A common laboratory-scale mechanical method for cell disruption uses glass, ceramic, or steel beads, 0.1–2 mm (0.004–0.08 in) in diameter, mixed with a sample suspended in an aqueous solution. First developed by Tim Hopkins in the late 1970s, the sample and bead mix is subjected to high level agitation by stirring or shaking.

  5. Optical tweezers - Wikipedia

    en.wikipedia.org/wiki/Optical_tweezers

    Optical tweezers (originally called single-beam gradient force trap) are scientific instruments that use a highly focused laser beam to hold and move microscopic and sub-microscopic objects like atoms, nanoparticles and droplets, in a manner similar to tweezers.

  6. New health warning issued about the dangers of water bead toys

    www.aol.com/news/health-warning-issued-dangers...

    One maker, Buffalo Games, also recalled more than 50,000 of its water bead activity kits in September after a 10-month-old in Wisconsin died after swallowing the beads.

  7. Photolithography - Wikipedia

    en.wikipedia.org/wiki/Photolithography

    Photolithography is the most common method for the semiconductor fabrication of integrated circuits ("ICs" or "chips"), such as solid-state memories and microprocessors. It can create extremely small patterns, down to a few nanometers in size. It provides precise control of the shape and size of the objects it creates.

  8. Photochromism - Wikipedia

    en.wikipedia.org/wiki/Photochromism

    Photochromism. A photochromic eyeglass lens, after exposure to sunlight while part of the lens remained covered by paper. Photochromism is the reversible change of color upon exposure to light. It is a transformation of a chemical species (photoswitch) between two forms by the absorption of electromagnetic radiation (photoisomerization), where ...

  9. CubeSat UV Experiment - Wikipedia

    en.wikipedia.org/wiki/CubeSat_UV_Experiment

    CubeSat UV Experiment (CUVE) is a space mission concept to study the atmospheric processes of the planet Venus with a small satellite. Specifically, the orbiter mission would study an enigmatic ultraviolet light absorber of unknown composition situated within the planet's uppermost cloud layer that absorbs about half the solar radiation downwelling in the planet's atmosphere.

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