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Total Acidity (A), tartaric acid (B), ammonium-nitrogen (C), total phenolic content (D) and O.D. 420 nm (E). Distinct letters are significantly different by the Tukey test (P ≤ 0.05). AT = Total Acidity (expressed as tartaric acid); A.N. = Ammonium Nitrogen; C4H6O6 = tartaric acid chemical formula; O.D. 420 nm = absorbance at 420 nm in spectrophotometer.
