Making Biofilm (IMAGE) Penn State Caption Researchers Ehsan Mahdinia (left) and Ali Demirci, in the College of Agricultural Sciences, are shown feeding microorganisms that produce the most potent form of vitamin K in a laboratory biofilm reactor in research that promises to reduce production costs and perhaps prices. Credit Amy Duke/Penn State Usage Restrictions Non commercial use only License Licensed 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.