Microbiology, Biochemistry, and Volatile Composition of Tulum Cheese Ripened in Goat's Skin or Plastic Bags

Formation of total free AA (FAA) during ripening of Tulum cheese ripened in plastic (P1, ▴; P2, ▵) and goat's skin (T1, ■ T2, □). P and T refer to the cheeses ripened in plastic or tulum materials, respectively; 1 and 2 refer to the cheeses manufactured in dairies 1 and 2, respectively.

Individual free AA (FAA) concentrations at 30 and 120 d in Tulum cheese ripened in plastic or goat's skin bags. P and T refer to the cheeses ripened in plastic or tulum materials, respectively; 1 refers to the cheeses manufactured in dairy 1.

Urea-PAGE electrophoretograms of the pH 4.6-insoluble fractions of Tulum cheeses ripened in plastic or goat's skin bags after ripening for 30, 60, 90, and 120 d. STD = sodium caseinate; P and T refer to the cheeses ripened in plastic or tulum materials, respectively; 1 and 2 refer to the cheeses manufactured in dairies 1 and 2, respectively.

Reversed phase-HPLC peptide profiles of the pH 4.6-soluble fractions from Tulum cheeses ripened in plastic or goat's skin bags after 30 (A), 60 (B), 90 (C), and 120 d (D) of ripening. P and T refer to the cheeses ripened in plastic or tulum materials, respectively; 1 and 2 refer to the cheeses manufactured in dairies 1 and 2, respectively. AU = absorbance units. Reversed phase-HPLC peptide profiles of the pH 4.6-soluble fractions from Tulum cheeses ripened in plastic or goat's skin bags after 30 (A), 60 (B), 90 (C), and 120 d (D) of ripening. P and T refer to the cheeses ripened in plastic or tulum materials, respectively; 1 and 2 refer to the cheeses manufactured in dairies 1 and 2, respectively. AU = absorbance units.

Reversed-phase HPLC peptide profiles of the 70% ethanol-soluble fractions from Tulum cheeses ripened in plastic or goat's skin bags after 30 (A) and 120 d (B) of ripening. P and T refer to the cheeses ripened in plastic or tulum materials, respectively; 1 and 2 refer to the cheeses manufactured in dairies 1 and 2, respectively. AU = absorbance units.

Reversed-phase HPLC peptide profiles of the 70% ethanol-insoluble fractions from Tulum cheeses ripened in plastic or goat's skin bags after 30 (A) and 120 d (B) of ripening. P and T refer to the cheeses ripened in plastic or tulum materials, respectively; 1 and 2 refer to the cheeses manufactured in dairies 1 and 2, respectively. AU = absorbance units.