after control observations ( 20 to 80 min ) were made , purified lps from e. coli was added ( n = 4 ) to the perfusate to achieve [ endotoxin ] of 0.01 micrograms/ml ( 80 to 120 min ) and 0.1 micrograms/ml ( 120 to 160 min ) .
C0023810
lps
C0014264
endotoxin