Electron microscopes have certain advantages over optical microscopes: The biggest advantage is that they have a higher resolution and are therefore also able of a higher magnification (up to 2 million times). Light microscopes can show a useful magnification only up to 1000-2000 times. This is a physical limit imposed by the wavelength of the light. Electron microscopes therefore allow for the visualization of structures that would normally be not visible by optical microscopy.
berm (plural berms) A narrow ledge or shelf, as along the top or bottom of a slope. A raised bank or path, especially the bank of a canal opposite the towpath. A terrace formed by wave action along a beach. A mound or bank of earth, used especially as a barrier or to provide insulation.
Beba. The action of squeezing/caressing a person's cheek with your first and thumb fingers, similar to what an aunt does when she hasn't seen you in awhile. The action is followed by proclaiming Beba! with a happy voice.The word is also used to describe someone's cheek in itself.This isn't a greeting, it's usually done after at least ten minutes of conversing. A Beba is basically performed to let the person know you're connected to them in some way, whether it be acquaintance, good friend or significant other.he action of squeezing/caressing a person's cheek with your first and thumb fingers, similar to what an aunt does when she hasn't seen you in awhile.