You will learn and practice how to: 1  determine thunderstorm base, top, and the trigger needed to get the storm started. 2  identify the boundary layer, cap, troposphere, tropopause, and stratosphere. 3  use the thermo diagram to help calculate various humidities. 4  determine temperature change of vertically moving air parcels.
The term ''immediate precursor'' means a substance 1  -. (A) which the Attorney General has found to be and by regulation designated as being the principal compound used, or produced primarily for use, in the manufacture of a controlled substance; (B) which is an immediate chemical intermediary used or likely to be used in the manufacture of such controlled substance; and.
From Wikipedia, the free encyclopedia. In chemistry, a precursor is a compound that participates in the chemical reaction that produces another compound. In biochemistry, the term precursor is used more specifically to refer to a chemical compound preceding another in a metabolic pathway.aman spectroscopy has been successfully tested to detect explosives and their precursors. A portable, advanced sensor based on infrared spectroscopy in a hollow fiber matched to a silicon-micromachined fast gas chromatography column can analyze illegal stimulants and precursors with nanogram-level sensitivity.