Efecto de la adición de harina de melloco (Ullucus Tuberosus) variedad amarillo (INIAP-Quillu) en las propiedade fisicoquímicas y reológicas del yogurt bajo en grasa

Abstract

The objective of the present investigation was to evaluate the effect of inclusion of yellow melloco flour (INIAP-Quillu) in physicochemical and rheological properties of lown fat yogurt. In the initial phase, yogurts were developed with the inclusion of three percentages of melloco flour at 0.3 percent, 0,6 percent, and 0,9 percent and one control; the percentage of fat in the starting milk was adjusted to 2 percent. The samples of yogurt were subjected to a sensorial analysis to determine acceptability. The results obtained indicate that the product with the best acceptance was yogurt with 0,9 percent melloco flour. The physicochemical properties (pH and titratable acidity) as well as rheological and microbiological parameters (viscosity) of the yogurt were evaluated both on the initial and final day during storage. The proximal composition was evaluated both at the beginning and at the end of storage. At the end of the storage period, pH and acidity were similar in all treatments; the rheological characteristics were affected, increasing its viscosity in the yogurt with the presence of flour, Finally, in the microbiological analysis allowed for the observation of greater growth of lactic acid bacteria (LAB) in the sample in which melloco flour was added, in relation to its homologue without the inclusion of melloco flour.