Natural channel proteins are integrated into artificial membranes to facilitate the transport of ions and molecules. (sciencedaily.com)
This course teaches you about using natural channels to get out back, reading ho (surflodgelimasan.com)
The Surface Mining Control and Reclamation Act imposes requirements to minimize impacts on the land and on natural channels, such as requiring that water discharged from mines will not degrade stream water quality below established standards. (dotearth.blogs.nytimes.com)