Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Experimental apparatus for the recrystallization of ampicillin by GAS process: 1 CO2 cylinder, 2 molecular sieve column, 3 cooler, 4 HPLC pump, 5 valve, 6 spiral heat exchanger, 7 precipitation vessel, 8 sinter metal filter, 9 oven, 10 back pressure valve, 11 organic solvent collection vessel
