Staircase Pattern

A descriptive term for a pattern seen when a multimeric protein is separated into lanes in an electrophoretic gel—each step corresponds to a different length of protein, as may be seen with von Willebrand factor multimers
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Stepped gears, which have gears of different diameters layered in a staircase pattern, and pinion gears with shafts are machinable thanks to the prevention of interference between grinding wheels and workpieces.
It's the most striking experimental demonstration so far of the extremely general devil's staircase pattern, he says.
The technique involves etching a lens surface to create a staircase pattern of notches that scatter light in just the right way.