2. Any substance having a defined molecular composition.
For a greater understanding of the chemical elements, see this extensive list.
This may be accomplished in the form of an injection of a local anesthetic into the ganglia concerned for temporary inducement or the injection of alcohol or phenol for permanent inducement.
This resource includes: chemical words and definitions and a great deal of knowledge about chemical elements that are described at this chemical elements list; as well as, a Chemical-Elements Chart History; Part 1 and Part 2, both of which are available here.
With this method, a substrate is exposed to one or more vaporized compounds, one or more of which contain desirable constituents.
A chemical reaction is initiated, at or near the substrate surface, to produce the desired material that will condense on the substrate.
- Carbonation, the breakdown of calcite by reaction with carbonic acid in rainwater.
- Hydrolysis, a breakdown of feldspar into china clay by reaction with carbonic aid in rainwater.
- Oxidation, the breakdown of iron-rich minerals due to rusting.
- Hydration, an expansion certain minerals due to the uptake of water.