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  2. Pneumatic trough - Wikipedia

    en.wikipedia.org/wiki/Pneumatic_trough

    Four items are required for gas collection with a pneumatic trough: [2] The trough itself, which is a large glass dish or a similar container. A gas bottle (or bulb), to hold the gas collected. A way to support the gas bottle or bulb, such as a beehive shelf or a hanger (as with Stephen Hales' design). A liquid in the trough.

  3. Langmuir–Blodgett trough - Wikipedia

    en.wikipedia.org/wiki/Langmuir–Blodgett_trough

    For example, through devices fabricated from an LB trough Lee et al. [17] showed in 2006 that direct electron tunneling was the mode of transportation in alkanethiol self-assembled monolayers [18] Langmuir-Blodgett Troughs have unique advantages in nanoparticle deposition, making them capable of creating highly sophisticated coatings with ...

  4. Trough (geology) - Wikipedia

    en.wikipedia.org/wiki/Trough_(geology)

    Satellite image of the Cayman Trough Bathymetric features of the Rockall Trough northwest of Scotland and Ireland. In geology, a trough is a linear structural depression that extends laterally over a distance. Although it is less steep than a trench, a trough can be a narrow basin or a geologic rift. These features often form at the rim of ...

  5. Oceanic trench - Wikipedia

    en.wikipedia.org/wiki/Oceanic_trench

    Some troughs look similar to oceanic trenches but possess other tectonic structures. One example is the Lesser Antilles Trough, which is the forearc basin of the Lesser Antilles subduction zone. [8] Also not a trench is the New Caledonia trough, which is an extensional sedimentary basin related to the Tonga-Kermadec subduction zone. [9]

  6. Sag (geology) - Wikipedia

    en.wikipedia.org/wiki/Sag_(geology)

    In geology a sag, or trough, is a depressed, persistent, low area; the opposite of an arch, or ridge, a raised, persistent, high area.The terms sag and arch were used historically to describe very large features, for example, characterizing North America as two arches with a sag between them.

  7. Beehive shelf - Wikipedia

    en.wikipedia.org/wiki/Beehive_shelf

    The right-hand drawing is about half the scale of the others and shows the shelf in use inside a pneumatic trough. A beehive shelf is a piece of laboratory equipment, usually of pottery, used to support a receiving jar or tube while a gas is being collected over water with a pneumatic trough. It is used so that when the gas emerges from the ...

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