Cellulose triacetate is a similar cellulose derivative to acetate. Cellulose is used vastly in the form of nano-fibrils called nano-cellulose. Bioplastics are usually derived from sugar derivatives, including starch, cellulose, and lactic acid. Jute fibers are composed primarily of the plant materials cellulose and lignin. The insoluble carbohydrates in soybeans consist of the complex polysaccharides cellulose, hemicellulose, and pectin. Examples are starch, cellulose, and glycogen. Methyl cellulose (or methylcellulose) is a chemical compound derived from cellulose. Wood is primarily composed of xylem cells with cell walls made of cellulose and lignin. Doron was made of fiberglass fibers placed in an ethyl cellulose resin under high pressure. This occurs through an insoluble matrix such as chromatographic medium like cellulose or polyacrylamide. Carbon forms the backbone of most plant biomolecules, including proteins, starches and cellulose. Accordis was a major manufacturer of cellulose based fibers and yarns. The theca is a secreted covering predominately composed of cellulose or other polysaccharides. These enzymes hydrolyse the substrate carboxymethyl cellulose. Dialyzer membranes used to be made primarily of cellulose (derived from cotton linter).