Enhanced bioconversion of potato byproducts into natural blue pigments by Streptomyces lydicus PM7: bioprocess optimization and biochemical insight insights - Astudillo, Álvaro; Hormazábal, Emilio; Diez, María Cristina; Rubilar, Olga; Alencar, Severino Matias; Scheuermann, Erick; Briceño, Gabriela; Schalchli, Heidi (Chemical and Biological Technologies in Agriculture, 2026)