The droplets travel through tiny channels filled with water or oil — whichever fluid the droplets don't dissolve in — and switch paths automatically based on subtle differences in their mass or diameter. (sciencemag.org)
The newly described nemertides attack tiny channels in cell walls that control the amount of sodium flowing in and out of the cell. (sciencenews.org)
The approach consists of a device filled with tiny channels and cavities that DNA molecules can move in and out of, resulting in some of the familiar Tetris shapes, like the «L,» the square, and the zigzag (illustrated above: a DNA molecule, in red, occupies four cavities in a zigzag). (sciencemag.org)