Jack Pine Pollen - 3 kV
This image is an Environmental Scanning Electron Microscope (ESEM) image of some air-dried Jack Pine pollen grains collected from near Mio in Michigan. The 3 kV electrons do not penetrate far into the pollen grains. The image has a much more solid appearance than the images at higher voltage. The internal structure of the grains cannot be detected, and the image is dominated by the surface structure of the pollen grains. The quality of the image is a little poorer than the 5 kV image because the system is not optimized for low voltage work.