The utilization of the response surface methodology for the optimization of cultivation medium and growth parameters in the cultivation of the yeast strain S. cerevisiae 3.20 on ethanol

A mutant strain of the yeast Saccharomyces cerevisiae growing on ethanol as single source of carbon and energy was used in optimization experiments at laboratory and micropilot scale, following the surface response methodology. The cultivation medium optimization was performed on the basis of maximization of dry cell weight and the process parameters optimization on the basis of substrate yield maximization

Isolation of a Lactobacillus plantarum strain used for obtaining a product for the preservation of fodders

An important problem in the field of animal nutrition is the preservation of fodder, which is done in silos for maintaining the nutritive value of the fodders. In anaerobic conditions, the lactic bacteria ferment the glucosides in the silo, leading to the formation of lactic acid and acetic acid, which cause the pH to decrease and inhibit the development of butyric bacteria. The enrichment of the ensiled fodders with probiotic products confers on them the role of maintaining a microbial flora inside the digestive tract favourable to animal health.African Journal of Biotechnology Vol. 4 (5), pp. 403-408, 200