Zirconium dioxide coating on particles of titanium dioxide pigments, as a refractory material, in insulation, abrasives and enamels. Stabilized zirconia is used in oxygen sensors and fuel cell membranes because it has the ability to allow oxygen ions to move freely through the crystal structure at high temperatures. This high ionic conductivity (and a low electronic conductivity) makes it one of the most useful electroceramics. Zirconium dioxide is also used as the solid electrolyte in electrochromic devices. Zirconia is a precursor to the electroceramic lead zirconate titanate ("PZT"), which is a high-K dielectric, which is found in myriad components. The very low
Synthetic cannabinoids were originally used for cannabinoid research focusing on tetrahydrocannabinol (THC), the main psychoactive and analgesic compound found in the cannabis plant. Synthetic cannabinoids were used in part due to legal restrictions on natural cannabinoids, which make them very hard to obtain for research. Tritium-labelled cannabinoids such as CP-55,940 were instrumental in discovering the cannabinoid receptors in the early 1990s. Some early synthetic cannabinoids were also used in clinics. Nabilone, a first generation synthetic THC analog, has been used as an antiemetic, a drug to combat vomiting and nausea, since 1981. Synthetic THC (marinol, dronabinol) has been used as an antiemetic