Green Alga Cultures (image) Bielefeld University Caption Biologists at Bielefeld University have added cellulose to green alga cultures and used biochemical and molecular-biological methods to show that the algae break down the cellulose into simple sugars and can use this as a source of energy. Credit Bielefeld University Usage Restrictions The image may only be used with appropriate caption or credit. 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.