These super absorbents typically are cross-linked acrylic homo-polymers (usually sodium neutralized). Trifluoroacetyl chloride also reacts with soil, cellulose-based absorbents, and clay-based absorbents. Other ionic liquids have been simulated or experimentally tested for potential use as CO absorbents. Carbon dioxide (which bananas produce) and ethylene absorbents extend fruit life even at high temperatures. Liquids with these reactive groups have been known to react with mineral-based and clay-based absorbents. Ethylene absorbents extend storage time of bananas even at high temperatures. Approximately 477,234 pounds of oil absorbents and other contaminated solids were removed during the cleanup. Some absorbents made from lithium hydroxide (LiOH) are also available for this purpose. Natural fibers are good sweat absorbents and can be found in a variety of textures. The silk is used in thermal insulation, acoustic insulation, and oil absorbents. The SNOX process is based on catalytic reactions and does not consume water or absorbents. Also, the gel did not release liquid water the way that fiber-based absorbents do. Efficient new absorbents to capture atmospheric CO are being developed, mimicking plants' ability. David Green and Cope ran one race each with sponsorship from JPO Absorbents. In developing countries, the use of absorbents in pit toilets is not commonly practiced.