The reddish-brown color of human feces is derived from stercobilin, a tetrapyrrole[?] chemical compound created by bacterial action on bilirubin and subsequent oxidation.
... them as follows: British Aerospace (33%), Daimler-Benz (33%), Alenia[?] of Italy (21%), and CASA of Spain (13%).
Over the next five years, design work continued, aided by ...