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.
The diameter of an atomic nucleus is only about 10 - 14 m so a wavelength of 10 -38 m is immeasurably small! We can never expect to measure anything this small. What is the deBroglie wavelength of a 20 keV electron? Such electrons are typical in the electron guns of color TVs or color computer monitors.