Flotation Using Biotechnology (IMAGE) Helmholtz-Zentrum Dresden-Rossendorf Caption Bioactive substances derived from bacteria will adhere to the surfaces of ore minerals in targeted fashion, harvesting valuable metal particles and leaving the worthless components as a residue. Scientists from the Helmholtz Institute Freiberg for Resource Technology (HIF) are researching this with partners from Chile. Credit C) HZDR / 3Dkosmos Usage Restrictions None 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.