Microscopic images of soft and stiff foam (IMAGE) University of Copenhagen - Faculty of Science Caption Microscopic images of soft (left) and stiff (right) foam. The green/yellow areas are networks of bacteria and milk protein. The hydrophobic bacteria adhere to the surface of the round air bubbles (red particles) in the stiff foam, while very few of the hydrophilic bacteria are shown on the bubbles in the soft foam. Credit From the article "Lactic acid bacteria as structural building blocks in non-fat whipping cream analogues" in Food Hydrocolloids. Usage Restrictions The image may be used with appropriate caption and credit. License Original content 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.