| study on streptococcus thermophilus isolated from qula and associated characteristic of acetaldehyde and diacetyl in their fermented milk. | in this study, the lactic acid bacterial population of qula cheese from the gansu and sichuan provinces of china were isolated and identified. eight strains of streptococcus thermophilus were isolated, of which five strains were selected for further characterization based on their fermentation properties. the changes in a number of parameters, including titration acidity, ph, viable counts, prts protease activity and the production of acetaldehyde, diacetyl and organic acid, were monitored durin ... | 2015 | 26018501 |