Fig. 3From: The pH-Dependent Stucture and Properties of Au and Ag Nanoparticles Produced by Tryptophan ReductionRepresentative fragment of mass spectra of gold colloids under consideration in mass range 40 to 1000 Da for positive (a) and negative (b) ions (reflectron). Plus sign corresponds to observed tryptophan fragments, equal sign corresponds to kynurenine fragmentsBack to article page