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Nitrite content (nmol/mL of digest) in digest at the end of the oral (2 min), gastric (120 min), and intestinal phase (240 min). n.s.: not significant; *: p ≤ 0.05; **: p ≤ 0.01; ***: p ≤ 0.001. a,b: Values for the same time of sampling bearing different letters are significantly different at p ≤ 0.05, Tukey’s test.
