In 2003, the FDA approved generic gabapentin, and it's now made by several drug companies. An extended-release form of gabapentin is available under the brand name Horizant. In 2004, the drug maker Pfizer settled charges for marketing Neurontin for unapproved uses, and agreed to pay $430 million.
Although most diatoms are autotrophic, some heterotrophic or symbiotic species can be found in particular habitats. The living matter of each diatom is enclosed in a shell of silica that it secretes. These shells are marked by minute pores or depressions that allow the living organism access to its environment.iatom (dÄªËÉtÅmË, âtÅmË) [ key ], unicellular organism of the kingdom Protista, characterized by a silica shell of often intricate and beautiful sculpturing. Most diatoms exist singly, although some join to form colonies.
Diatoms are a protist (single cell organism) which is part of the family of eucaryotic (Cells that have nuclei) algae. There are two types of diatoms, pennales (pennate shaped), and centrales (circular shaped).Diatoms like all plant cells are photosynthetic, meaning they make their own sucrose (sugar) from light, water, and nutrients. Diatoms use oils to store sugar. The oil also keeps the diatoms afloat.here are two types of diatoms, pennales (pennate shaped), and centrales (circular shaped). Diatoms like all plant cells are photosynthetic, meaning they make their own sucrose (sugar) from light, water, and nutrients. Diatoms use oils to store sugar.