Controlled Substances Act. An Act to amend the Public Health Service Act and other laws to provide increased research into, and prevention of, drug abuse and drug dependence; to provide for treatment and rehabilitation of drug abusers and drug dependent persons; and to strengthen existing law enforcement authority in the field of drug abuse.
What Is Polycarbonate ? The Stuff They Use For The Lenses In Sunglasses, Safety Glasses And Goggles. Polycarbonates are a particular group of thermoplastics. They are easily worked, molded, and thermoformed; as such, these plastics are very widely used in modern manufacturing.
Hard contact lenses are often made of PMMA. As an injectable filler, PMMA is formulated into microscopic spheres that are suspended in a carrier of collagen with a small amount of the anesthetic lidocaine. It is used to permanently raise indented scars and fill in folds like the nasolabial folds.