Each year Colorado Counties are required to submit to the Division of Property Taxation, the Property Tax Administrator, the State Board of Equalization and the County Board of Equalization (the Board of County Commissioners) an Abstract of Assessment.
Nageli and Cramer in 1855 had already suggested that biological cells are separated from their environment by a membrane possessing special characteristics, and in 1900 Overton performed some simple but classical experiments which proposed that cell membranes were composed of lipids (1).
Lipid membranes do not only form the outer layer of cells. Cell organelles, such as the Golgi complex, mitochondria, chloroplasts, lysosomes, the endoplasmic reticula and the nucleus, are also enclosed by membranes.