Beetroot-Pigment-Derived Colorimetric Sensor for Detection of Calcium Dipicolinate in Bacterial Spores Gonçalves, Letícia Christina Pires ; Da Silva, Sandra Maria ; DeRose, Paul C. ; Ando, Rômulo Augusto ; Bastos, Erick Leite Abstract Publication: PLoS ONE Pub Date: September 2013 DOI: 10.1371/journal.pone.0073701 Bibcode: 2013PLoSO...873701G