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  2. Spot analysis - Wikipedia

    en.wikipedia.org/wiki/Spot_analysis

    Spot analysis, spot test analysis, or spot test is a chemical test, a simple and efficient technique where analytic assays are executed in only one, or a few drops, of a chemical solution, preferably in a great piece of filter paper, without using any sophisticated instrumentation. The development and popularization of the test is credited to ...

  3. File:Steeping workshop whiteboard.pdf - Wikipedia

    en.wikipedia.org/wiki/File:Steeping_workshop...

    You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made.

  4. Flip chart - Wikipedia

    en.wikipedia.org/wiki/Flip_chart

    Flip chart. A flip chart is a stationery item consisting of a pad of large paper sheets. It is typically fixed to the upper edge of a whiteboard, or supported on a tripod or four-legged easel. Such charts are commonly used for presentations .

  5. Whiteboard - Wikipedia

    en.wikipedia.org/wiki/Whiteboard

    Whiteboard with marker and eraser. A whiteboard (also known by the terms marker board, dry-erase board, dry-wipe board, and pen-board) is a glossy, usually white surface for making non-permanent markings. Whiteboards are analogous to blackboards, but with a smoother surface allowing for rapid marking and erasing of markings on their surface.

  6. BDA (TSA program) - Wikipedia

    en.wikipedia.org/wiki/BDA_(TSA_program)

    BDA (TSA program) Behavior Detection and Analysis ( BDA ), until 2016 called Screening of Passengers by Observation Techniques ( SPOT ), is a program launched in the United States by the Transportation Security Administration to identify potential terrorists among people at an airport by a set of 94 objective criteria, all of which are signs ...

  7. Arago spot - Wikipedia

    en.wikipedia.org/wiki/Arago_spot

    Notation for calculating the wave amplitude at point P 1 from a spherical point source at P 0.. At the heart of Fresnel's wave theory is the Huygens–Fresnel principle, which states that every unobstructed point of a wavefront becomes the source of a secondary spherical wavelet and that the amplitude of the optical field E at a point on the screen is given by the superposition of all those ...

  8. Spot test (lichen) - Wikipedia

    en.wikipedia.org/wiki/Spot_test_(lichen)

    A spot test in lichenology is a spot analysis used to help identify lichens. It is performed by placing a drop of a chemical reagent on different parts of the lichen and noting the colour change (or lack thereof) associated with application of the chemical. The tests are routinely encountered in dichotomous keys for lichen species, and they ...

  9. Low-energy electron diffraction - Wikipedia

    en.wikipedia.org/wiki/Low-energy_electron...

    Low-energy electron diffraction ( LEED) is a technique for the determination of the surface structure of single-crystalline materials by bombardment with a collimated beam of low-energy electrons (30–200 eV) [ 1] and observation of diffracted electrons as spots on a fluorescent screen.

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