CAUTION: Federal (U.S.A.) law restricts this drug to use by or on the order of a licensed veterinarian. DrontalÂ® Plus Taste TabsÂ® (praziquantel/pyrantel pamoate/febantel) Broad Spectrum Chewable Anthelmintic Tablets for Dogs are available in three tablet sizes. Each size is scored for convenient oral administration.
Ozone is also destroyed naturally in the stratosphere, being dissociated by ultraviolet radiation: This is the reaction that is responsible for O3's absorbtion of uv radiation that would otherwise reach earth.
As in the stratosphere, ozone in the troposphere is destroyed by naturally occurring chemical reactions and by reactions involving human-produced chemicals. Tropo-spheric ozone can also be destroyed when ozone reacts with a Ozone is formed throughout the atmosphere in multistep chemical processes that require sunlight.In the stratosphere, the process begins with an oxygen molecule (O 2) being broken apart by ultraviolet radiation from the Sun.In the lower atmos phere (troposphere), ozone is formed by a different set of chemical reactions that involve naturally occurring gases and those from pollution sources.ropospheric ozone. Near Earthâs surface, ozone is produced by chemical reactions involving naturally occur-ring gases and gases from pollution sources. Ozone produc-tion reactions primarily involve hydrocarbon and nitrogen oxide gases, as well as ozone itself, and all require sunlight for completion.