title: A collaborative study on the determination of tryptophan in feedingstuffs.
mesh_terms: D000821:Animal Feed / Q000032:analysis*; D010367:Arachis / Q000032:analysis; D003369:Cottonseed Oil / Q000032:analysis; D005069:Evaluation Studies as Topic; D013025:Glycine max / Q000032:analysis; D014364:Tryptophan / Q000032:analysis*
chemical_list: D003369:Cottonseed Oil; D014364:Tryptophan