From 1858 to 1906, the opium trade market in Jiangsu formed its own characters, generally concluded as "late starting, much change, fast development and middle scale".
Emotional evaluation of short musical fragments was compared for healthy people, patients with endogenous or neurotic depression, and opium addicts with affective disorders.
Using gas chromatography, the alkaloids morphine, codeine, thebaine, papaverine and narcotine contained in opium extract have been identified and quanti-fied as free bases in one step without derivation.
For this purpose, accurately weighed amounts of opium extract and internal standard are prepared according to the method described, and an aliquot part of the resultant solution is subjected to gas chromatography under defined conditions.