At what temperature and for how long is the pasteurization of active brewers yeast carried out so as to render it inactive?

Pasteurization of active brewer's yeast is typically carried out at a temperature of around 60-70°C (140-158°F) for about 10-30 minutes. This process effectively kills the yeast cells, rendering them inactive while preserving some of their nutritional properties. The exact temperature and time can vary depending on the specific strain of yeast and desired outcome.