Combined effects of pH, yeast extract, carbohydrates and di-ammonium hydrogen citrate on the biomass production and acidifying ability of a probiotic Lactobacillus plantarum strain, isolated from table olives, in a batch system

摘要: A four variables-five levels Central Composite Design (CCD) was developed to model the individual and interactive effects of carbohydrates (lactose or maltose), yeast extract, di-ammonium hydrogen citrate pH on biomass production (Abs600 nm), viable cultivable cell number acidifying ability a probiotic strain Lactobacillus plantarum, isolated from table olives “Bella di Cerignola”. values were modeled through negative Gompertz equation, in order obtain parameter α (metabolic adaptation time). This value submitted stepwise procedure second polynomial equations derived. The affected by initial lactose; effect maltose, however, not significant. increased with increasing maltose concentrations maximum at 6.0 20 g l−1 lactose.