1 Stock number stamps contain movable bands with the numbers 0 - 9. 2  Choose between a sturdy metal core frame or sleek, economical plastic frame number stamp.
The channel has a large diameter of 0.8x1.1nm, and is non-selective for small ions. However, it has an upper exclusion size limit corresponding to molecular weights of about 600 Dalton of permeants. Because most metabolites have molecular weights lower than 600 Da and have been shown to pass through porin channels, porins are called general diffusion pores.
English Channel, Fr. La Manche [the sleeve], arm of the Atlantic Ocean, c.350 (560 km) long, between France and Great Britain. It is 112 mi (180 km) wide at its west entrance, between Land's End, England, and Ushant, France. Its greatest width, c.150 mi (240 km) is between Lyme Bay and the Gulf of St.-Malo; at the east, between Dover and Cape Gris-Nez, it is 21 mi (34 km) wide. The Strait of Dover connects the Channel with the North Sea.