Beer Carbonation Comparison (image) Indiana University Share Print E-Mail Caption The two strains of brewer's yeast on the left failed to carbonate without treatment with nutrient-rich compound. The right two samples show successful carbonation with the same yeast strains after treatment. Credit Matthew Bochman Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.