Abstract

AGUDELO, CLAUDIA; ORTEGA, RODRIGO  and  HOYOS, JOSÉ LUIS. DETERMINARON OF KINETIC PARAMETERS OF TWO LACTIC INOCULUMS: Lactobacillus plantarum A6 AND LACTIC ACID BACTERIAS OF YOGURT. Rev.Bio.Agro [online]. 2010, vol.8, n.2, pp.08-16. ISSN 1692-3561.

A comparison was made of the kinetic behavior of two inoculums of lactic acid bacteria (LAB) developed from Lactobacillus plantarum A6 and commercial yogurt. They were incubated at 35°C during 48 hours and were replicated after 24 hours of fermentaron in liquid medium forits possible application in the fermentaron of fishing residues. For each strain was measured the biomass through plate count according to the NTC 5034 of 2002, the total sugars consumption by the antrona method and the lactic acid by titulation under the NTC 4978 of 2001 during the incubation time. The results showed a better development for Lactobacillus plantarum A6 with meaningful differences (α = 0,05) in the performances Yx/s y Yp/s of 0,401 and 0,34 respectively to the first stage, and of Yx/s= 0,39 and Yp/s = 0,36 in the second stage unlike those of LAB of the yogurt which displayed lower performances. Other kinetic parameters like máximum speed growth and duplication time for both strains do not show meaningful differences (α = 0,05).

Keywords : Acid; Kinetic; Lactobacillus plantarum A6; Lactobacillus delbrueckii; Streptococcus thermophilus.

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