If you want to change dentists during a course of treatment, you may have to pay the first dentist for the treatment to date. It is always sensible to find a second dentist in advance who is prepared to complete a course of treatment already started by another dentist.
Oxide definition: An oxide is a compound of oxygen and another chemical element. | Meaning, pronunciation, translations and examples English Dictionary | Thesaurus | Translator | Grammar | Scrabble | Blog
Nitrogen oxides, or NOx, is the generic term for a group of highly reactive gases, all of which contain nitrogen and oxygen in varying amounts. Many of the nitrogen oxides are colorless and odorless. However, one common pollutant, nitrogen dioxide (NO2) along with particles in the air can often be seen as a reddish-brown layer over many urban areas. Nitrogen oxides form when fuel is burned at high temperatures, as in a combustion process.