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Foram isoladas leveduras prevalescentes de dois alambiques, em Betim e Rio Manso/MG, por meio de plaqueamento (WLN) e caracterizadas segundo a macromorfologia de colônias, após 8 dias de incubação a 32ºC. A amostra de Rio Manso apresentou 4 linhagens dominantes, com concentrações entre 2,0 x 10(7) e 4,0 x 10(5) UFC/mL. No alambique de Betim foram isoladas três linhagens dominantes, com contagens entre 1,3 x 10(8) e 2,0 x 10(4) UFC/mL. Foram determinados a velocidade específica máxima de crescimento (µmax) e o fator de conversão de substrato em biomassa (Yx/s) para dois isolados. Os valores de &#956;max foram 0,24 e 0,4 h-1, sendo que a linhagem RM01 apresentou maior valor. Para Yx/s, os resultados obtidos pelas linhagens RM01 e CV01 foram 0,179 e 0,185 g.g-1, respectivamente. Verificou-se uma semelhança nos resultados entre as linhagens RM01 e CV01. Concluiu-se que, do ponto de vista de &#956;max e de Yx/s, a melhor linhagem para produção de cachaça é a RM01. Predominant yeasts of two cachaça distilleries were isolated in the cities of Betim and Rio Manso, in the State of Minas Gerais and characterized using WLN agar, according to colony morphology, after 8 days of imcubation at 32ºC. The sample from Rio Manso presented 4 dominant yeasts with concentrations between 2.0 x 10(7) and 4.0 x 10(5) CFU/mL. At Betim distillery, three dominant yeasts were isolated with cell density between 1.3 x 10(8) and 2.0 x 10(4) CFU/mL. The values of the maximum specific velocity for growth (µmax) and the conversion factor for substrate into cells (Yx/s) were determined for two isolates. The &#956;max values were 0.24 and 0.4 h-1, being RM01 strain the one with the highest value. Regarding to Yx/s, the results obtained by strains RM01 and CV01 were 0.179 and 0.185 g.g-1, respectively. Resemblances of results were observed between strains RM01 and CV01. It was concluded that, as far as &#956;max and Yx/s are concerned, the best strain to produce cachaça is RM01

Parâmetros cinéticos de linhagens de levedura isoladas de alambiques mineiros