Lactic acid production rates during the different growth phases of Lactobacillus helveticus cultivated on whey supplemented with yeast extract

acide lactique azote biomasa biomass biomasse crecimiento croissance culture media extractos de levadura extrait de levure fermentation growth growth rate lactic acid lactobacillus helveticus lactosa lactose lactosuero medio de cultivo milieu de culture nitrogen production taux de croissance whey yeast extracts