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  2. Molecular-weight size marker - Wikipedia

    en.wikipedia.org/wiki/Molecular-weight_size_marker

    A molecular-weight size marker, also referred to as a protein ladder, DNA ladder, or RNA ladder, is a set of standards that are used to identify the approximate size of a molecule run on a gel during electrophoresis, using the principle that molecular weight is inversely proportional to migration rate through a gel matrix.

  3. Ladder - Wikipedia

    en.wikipedia.org/wiki/Ladder

    An extension ladder. A ladder is a vertical or inclined set of rungs or steps commonly used for climbing or descending. There are two types: rigid ladders that are self-supporting or that may be leaned against a vertical surface such as a wall, and rollable ladders, such as those made of rope or aluminium, that may be hung from the top.

  4. How To Create a CD Ladder That Functions as Emergency ... - AOL

    www.aol.com/finance/create-cd-ladder-functions...

    Hopkins said your contributions to a CD ladder depend on your personal saving goals and needs. “For emergency savings, it is recommended to keep at least six months’ worth of living expenses ...

  5. Helicopter flight rescue system - Wikipedia

    en.wikipedia.org/wiki/Helicopter_Flight_Rescue...

    A stretcher carriage device is used for carriage of an injured subject unable to use a rescue harness (due to the nature of injury or ailment). The subject is (usually) secured to a stretcher and the stretcher is placed and secured inside the device. The device is then attached to the main load line.

  6. How to use the ladder strategy to save on life insurance - AOL

    www.aol.com/finance/ladder-strategy-save-life...

    The ladder strategy involves stacking multiple term life insurance policies to match changing financial needs. Laddering typically saves money over time compared to one large policy.

  7. Firefighters use ladder to pull person from Wichita apartment ...

    www.aol.com/firefighters-ladder-pull-person...

    Firefighters used a ladder to pull one unresponsive person from an east Wichita apartment building fire that injured four people early Friday morning, battalion chief Jose Ocadiz said.

  8. Cosmic distance ladder - Wikipedia

    en.wikipedia.org/wiki/Cosmic_distance_ladder

    The cosmic distance ladder (also known as the extragalactic distance scale) is the succession of methods by which astronomers determine the distances to celestial objects. A direct distance measurement of an astronomical object is possible only for those objects that are "close enough" (within about a thousand parsecs ) to Earth.

  9. Step stool - Wikipedia

    en.wikipedia.org/wiki/Step_stool

    However, they have the disadvantage of being less stable than a "normal ladder resting on the wall" so care should be taken when using a high step stool (or folding ladder) instead of a normal ladder placed against the wall, because with an imbalance it could tip over, someone holding it would be advisable. [5]